1 //===-- ObjectFileMachO.cpp -------------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "llvm/ADT/StringRef.h" 11 12 #include "lldb/Core/ArchSpec.h" 13 #include "lldb/Core/DataBuffer.h" 14 #include "lldb/Core/Debugger.h" 15 #include "lldb/Core/Error.h" 16 #include "lldb/Core/FileSpecList.h" 17 #include "lldb/Core/Log.h" 18 #include "lldb/Core/Module.h" 19 #include "lldb/Core/ModuleSpec.h" 20 #include "lldb/Core/PluginManager.h" 21 #include "lldb/Core/RangeMap.h" 22 #include "lldb/Core/Section.h" 23 #include "lldb/Core/StreamFile.h" 24 #include "lldb/Core/StreamString.h" 25 #include "lldb/Core/Timer.h" 26 #include "lldb/Core/UUID.h" 27 #include "lldb/Host/Host.h" 28 #include "lldb/Host/FileSpec.h" 29 #include "lldb/Symbol/ClangNamespaceDecl.h" 30 #include "lldb/Symbol/DWARFCallFrameInfo.h" 31 #include "lldb/Symbol/ObjectFile.h" 32 #include "lldb/Target/MemoryRegionInfo.h" 33 #include "lldb/Target/Platform.h" 34 #include "lldb/Target/Process.h" 35 #include "lldb/Target/SectionLoadList.h" 36 #include "lldb/Target/Target.h" 37 #include "lldb/Target/Thread.h" 38 #include "lldb/Target/ThreadList.h" 39 #include "Plugins/Process/Utility/RegisterContextDarwin_arm.h" 40 #include "Plugins/Process/Utility/RegisterContextDarwin_arm64.h" 41 #include "Plugins/Process/Utility/RegisterContextDarwin_i386.h" 42 #include "Plugins/Process/Utility/RegisterContextDarwin_x86_64.h" 43 44 #include "lldb/Utility/SafeMachO.h" 45 46 #include "ObjectFileMachO.h" 47 48 #if defined (__APPLE__) && (defined (__arm__) || defined (__arm64__) || defined (__aarch64__)) 49 // GetLLDBSharedCacheUUID() needs to call dlsym() 50 #include <dlfcn.h> 51 #endif 52 53 #ifndef __APPLE__ 54 #include "Utility/UuidCompatibility.h" 55 #endif 56 57 using namespace lldb; 58 using namespace lldb_private; 59 using namespace llvm::MachO; 60 61 class RegisterContextDarwin_x86_64_Mach : public RegisterContextDarwin_x86_64 62 { 63 public: 64 RegisterContextDarwin_x86_64_Mach (lldb_private::Thread &thread, const DataExtractor &data) : 65 RegisterContextDarwin_x86_64 (thread, 0) 66 { 67 SetRegisterDataFrom_LC_THREAD (data); 68 } 69 70 virtual void 71 InvalidateAllRegisters () 72 { 73 // Do nothing... registers are always valid... 74 } 75 76 void 77 SetRegisterDataFrom_LC_THREAD (const DataExtractor &data) 78 { 79 lldb::offset_t offset = 0; 80 SetError (GPRRegSet, Read, -1); 81 SetError (FPURegSet, Read, -1); 82 SetError (EXCRegSet, Read, -1); 83 bool done = false; 84 85 while (!done) 86 { 87 int flavor = data.GetU32 (&offset); 88 if (flavor == 0) 89 done = true; 90 else 91 { 92 uint32_t i; 93 uint32_t count = data.GetU32 (&offset); 94 switch (flavor) 95 { 96 case GPRRegSet: 97 for (i=0; i<count; ++i) 98 (&gpr.rax)[i] = data.GetU64(&offset); 99 SetError (GPRRegSet, Read, 0); 100 done = true; 101 102 break; 103 case FPURegSet: 104 // TODO: fill in FPU regs.... 105 //SetError (FPURegSet, Read, -1); 106 done = true; 107 108 break; 109 case EXCRegSet: 110 exc.trapno = data.GetU32(&offset); 111 exc.err = data.GetU32(&offset); 112 exc.faultvaddr = data.GetU64(&offset); 113 SetError (EXCRegSet, Read, 0); 114 done = true; 115 break; 116 case 7: 117 case 8: 118 case 9: 119 // fancy flavors that encapsulate of the above 120 // flavors... 121 break; 122 123 default: 124 done = true; 125 break; 126 } 127 } 128 } 129 } 130 131 132 static size_t 133 WriteRegister (RegisterContext *reg_ctx, const char *name, const char *alt_name, size_t reg_byte_size, Stream &data) 134 { 135 const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoByName(name); 136 if (reg_info == NULL) 137 reg_info = reg_ctx->GetRegisterInfoByName(alt_name); 138 if (reg_info) 139 { 140 lldb_private::RegisterValue reg_value; 141 if (reg_ctx->ReadRegister(reg_info, reg_value)) 142 { 143 if (reg_info->byte_size >= reg_byte_size) 144 data.Write(reg_value.GetBytes(), reg_byte_size); 145 else 146 { 147 data.Write(reg_value.GetBytes(), reg_info->byte_size); 148 for (size_t i=0, n = reg_byte_size - reg_info->byte_size; i<n; ++ i) 149 data.PutChar(0); 150 } 151 return reg_byte_size; 152 } 153 } 154 // Just write zeros if all else fails 155 for (size_t i=0; i<reg_byte_size; ++ i) 156 data.PutChar(0); 157 return reg_byte_size; 158 } 159 160 static bool 161 Create_LC_THREAD (Thread *thread, Stream &data) 162 { 163 RegisterContextSP reg_ctx_sp (thread->GetRegisterContext()); 164 if (reg_ctx_sp) 165 { 166 RegisterContext *reg_ctx = reg_ctx_sp.get(); 167 168 data.PutHex32 (GPRRegSet); // Flavor 169 data.PutHex32 (GPRWordCount); 170 WriteRegister (reg_ctx, "rax", NULL, 8, data); 171 WriteRegister (reg_ctx, "rbx", NULL, 8, data); 172 WriteRegister (reg_ctx, "rcx", NULL, 8, data); 173 WriteRegister (reg_ctx, "rdx", NULL, 8, data); 174 WriteRegister (reg_ctx, "rdi", NULL, 8, data); 175 WriteRegister (reg_ctx, "rsi", NULL, 8, data); 176 WriteRegister (reg_ctx, "rbp", NULL, 8, data); 177 WriteRegister (reg_ctx, "rsp", NULL, 8, data); 178 WriteRegister (reg_ctx, "r8", NULL, 8, data); 179 WriteRegister (reg_ctx, "r9", NULL, 8, data); 180 WriteRegister (reg_ctx, "r10", NULL, 8, data); 181 WriteRegister (reg_ctx, "r11", NULL, 8, data); 182 WriteRegister (reg_ctx, "r12", NULL, 8, data); 183 WriteRegister (reg_ctx, "r13", NULL, 8, data); 184 WriteRegister (reg_ctx, "r14", NULL, 8, data); 185 WriteRegister (reg_ctx, "r15", NULL, 8, data); 186 WriteRegister (reg_ctx, "rip", NULL, 8, data); 187 WriteRegister (reg_ctx, "rflags", NULL, 8, data); 188 WriteRegister (reg_ctx, "cs", NULL, 8, data); 189 WriteRegister (reg_ctx, "fs", NULL, 8, data); 190 WriteRegister (reg_ctx, "gs", NULL, 8, data); 191 192 // // Write out the FPU registers 193 // const size_t fpu_byte_size = sizeof(FPU); 194 // size_t bytes_written = 0; 195 // data.PutHex32 (FPURegSet); 196 // data.PutHex32 (fpu_byte_size/sizeof(uint64_t)); 197 // bytes_written += data.PutHex32(0); // uint32_t pad[0] 198 // bytes_written += data.PutHex32(0); // uint32_t pad[1] 199 // bytes_written += WriteRegister (reg_ctx, "fcw", "fctrl", 2, data); // uint16_t fcw; // "fctrl" 200 // bytes_written += WriteRegister (reg_ctx, "fsw" , "fstat", 2, data); // uint16_t fsw; // "fstat" 201 // bytes_written += WriteRegister (reg_ctx, "ftw" , "ftag", 1, data); // uint8_t ftw; // "ftag" 202 // bytes_written += data.PutHex8 (0); // uint8_t pad1; 203 // bytes_written += WriteRegister (reg_ctx, "fop" , NULL, 2, data); // uint16_t fop; // "fop" 204 // bytes_written += WriteRegister (reg_ctx, "fioff", "ip", 4, data); // uint32_t ip; // "fioff" 205 // bytes_written += WriteRegister (reg_ctx, "fiseg", NULL, 2, data); // uint16_t cs; // "fiseg" 206 // bytes_written += data.PutHex16 (0); // uint16_t pad2; 207 // bytes_written += WriteRegister (reg_ctx, "dp", "fooff" , 4, data); // uint32_t dp; // "fooff" 208 // bytes_written += WriteRegister (reg_ctx, "foseg", NULL, 2, data); // uint16_t ds; // "foseg" 209 // bytes_written += data.PutHex16 (0); // uint16_t pad3; 210 // bytes_written += WriteRegister (reg_ctx, "mxcsr", NULL, 4, data); // uint32_t mxcsr; 211 // bytes_written += WriteRegister (reg_ctx, "mxcsrmask", NULL, 4, data);// uint32_t mxcsrmask; 212 // bytes_written += WriteRegister (reg_ctx, "stmm0", NULL, sizeof(MMSReg), data); 213 // bytes_written += WriteRegister (reg_ctx, "stmm1", NULL, sizeof(MMSReg), data); 214 // bytes_written += WriteRegister (reg_ctx, "stmm2", NULL, sizeof(MMSReg), data); 215 // bytes_written += WriteRegister (reg_ctx, "stmm3", NULL, sizeof(MMSReg), data); 216 // bytes_written += WriteRegister (reg_ctx, "stmm4", NULL, sizeof(MMSReg), data); 217 // bytes_written += WriteRegister (reg_ctx, "stmm5", NULL, sizeof(MMSReg), data); 218 // bytes_written += WriteRegister (reg_ctx, "stmm6", NULL, sizeof(MMSReg), data); 219 // bytes_written += WriteRegister (reg_ctx, "stmm7", NULL, sizeof(MMSReg), data); 220 // bytes_written += WriteRegister (reg_ctx, "xmm0" , NULL, sizeof(XMMReg), data); 221 // bytes_written += WriteRegister (reg_ctx, "xmm1" , NULL, sizeof(XMMReg), data); 222 // bytes_written += WriteRegister (reg_ctx, "xmm2" , NULL, sizeof(XMMReg), data); 223 // bytes_written += WriteRegister (reg_ctx, "xmm3" , NULL, sizeof(XMMReg), data); 224 // bytes_written += WriteRegister (reg_ctx, "xmm4" , NULL, sizeof(XMMReg), data); 225 // bytes_written += WriteRegister (reg_ctx, "xmm5" , NULL, sizeof(XMMReg), data); 226 // bytes_written += WriteRegister (reg_ctx, "xmm6" , NULL, sizeof(XMMReg), data); 227 // bytes_written += WriteRegister (reg_ctx, "xmm7" , NULL, sizeof(XMMReg), data); 228 // bytes_written += WriteRegister (reg_ctx, "xmm8" , NULL, sizeof(XMMReg), data); 229 // bytes_written += WriteRegister (reg_ctx, "xmm9" , NULL, sizeof(XMMReg), data); 230 // bytes_written += WriteRegister (reg_ctx, "xmm10", NULL, sizeof(XMMReg), data); 231 // bytes_written += WriteRegister (reg_ctx, "xmm11", NULL, sizeof(XMMReg), data); 232 // bytes_written += WriteRegister (reg_ctx, "xmm12", NULL, sizeof(XMMReg), data); 233 // bytes_written += WriteRegister (reg_ctx, "xmm13", NULL, sizeof(XMMReg), data); 234 // bytes_written += WriteRegister (reg_ctx, "xmm14", NULL, sizeof(XMMReg), data); 235 // bytes_written += WriteRegister (reg_ctx, "xmm15", NULL, sizeof(XMMReg), data); 236 // 237 // // Fill rest with zeros 238 // for (size_t i=0, n = fpu_byte_size - bytes_written; i<n; ++ i) 239 // data.PutChar(0); 240 241 // Write out the EXC registers 242 data.PutHex32 (EXCRegSet); 243 data.PutHex32 (EXCWordCount); 244 WriteRegister (reg_ctx, "trapno", NULL, 4, data); 245 WriteRegister (reg_ctx, "err", NULL, 4, data); 246 WriteRegister (reg_ctx, "faultvaddr", NULL, 8, data); 247 return true; 248 } 249 return false; 250 } 251 252 protected: 253 virtual int 254 DoReadGPR (lldb::tid_t tid, int flavor, GPR &gpr) 255 { 256 return 0; 257 } 258 259 virtual int 260 DoReadFPU (lldb::tid_t tid, int flavor, FPU &fpu) 261 { 262 return 0; 263 } 264 265 virtual int 266 DoReadEXC (lldb::tid_t tid, int flavor, EXC &exc) 267 { 268 return 0; 269 } 270 271 virtual int 272 DoWriteGPR (lldb::tid_t tid, int flavor, const GPR &gpr) 273 { 274 return 0; 275 } 276 277 virtual int 278 DoWriteFPU (lldb::tid_t tid, int flavor, const FPU &fpu) 279 { 280 return 0; 281 } 282 283 virtual int 284 DoWriteEXC (lldb::tid_t tid, int flavor, const EXC &exc) 285 { 286 return 0; 287 } 288 }; 289 290 291 class RegisterContextDarwin_i386_Mach : public RegisterContextDarwin_i386 292 { 293 public: 294 RegisterContextDarwin_i386_Mach (lldb_private::Thread &thread, const DataExtractor &data) : 295 RegisterContextDarwin_i386 (thread, 0) 296 { 297 SetRegisterDataFrom_LC_THREAD (data); 298 } 299 300 virtual void 301 InvalidateAllRegisters () 302 { 303 // Do nothing... registers are always valid... 304 } 305 306 void 307 SetRegisterDataFrom_LC_THREAD (const DataExtractor &data) 308 { 309 lldb::offset_t offset = 0; 310 SetError (GPRRegSet, Read, -1); 311 SetError (FPURegSet, Read, -1); 312 SetError (EXCRegSet, Read, -1); 313 bool done = false; 314 315 while (!done) 316 { 317 int flavor = data.GetU32 (&offset); 318 if (flavor == 0) 319 done = true; 320 else 321 { 322 uint32_t i; 323 uint32_t count = data.GetU32 (&offset); 324 switch (flavor) 325 { 326 case GPRRegSet: 327 for (i=0; i<count; ++i) 328 (&gpr.eax)[i] = data.GetU32(&offset); 329 SetError (GPRRegSet, Read, 0); 330 done = true; 331 332 break; 333 case FPURegSet: 334 // TODO: fill in FPU regs.... 335 //SetError (FPURegSet, Read, -1); 336 done = true; 337 338 break; 339 case EXCRegSet: 340 exc.trapno = data.GetU32(&offset); 341 exc.err = data.GetU32(&offset); 342 exc.faultvaddr = data.GetU32(&offset); 343 SetError (EXCRegSet, Read, 0); 344 done = true; 345 break; 346 case 7: 347 case 8: 348 case 9: 349 // fancy flavors that encapsulate of the above 350 // flavors... 351 break; 352 353 default: 354 done = true; 355 break; 356 } 357 } 358 } 359 } 360 361 static size_t 362 WriteRegister (RegisterContext *reg_ctx, const char *name, const char *alt_name, size_t reg_byte_size, Stream &data) 363 { 364 const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoByName(name); 365 if (reg_info == NULL) 366 reg_info = reg_ctx->GetRegisterInfoByName(alt_name); 367 if (reg_info) 368 { 369 lldb_private::RegisterValue reg_value; 370 if (reg_ctx->ReadRegister(reg_info, reg_value)) 371 { 372 if (reg_info->byte_size >= reg_byte_size) 373 data.Write(reg_value.GetBytes(), reg_byte_size); 374 else 375 { 376 data.Write(reg_value.GetBytes(), reg_info->byte_size); 377 for (size_t i=0, n = reg_byte_size - reg_info->byte_size; i<n; ++ i) 378 data.PutChar(0); 379 } 380 return reg_byte_size; 381 } 382 } 383 // Just write zeros if all else fails 384 for (size_t i=0; i<reg_byte_size; ++ i) 385 data.PutChar(0); 386 return reg_byte_size; 387 } 388 389 static bool 390 Create_LC_THREAD (Thread *thread, Stream &data) 391 { 392 RegisterContextSP reg_ctx_sp (thread->GetRegisterContext()); 393 if (reg_ctx_sp) 394 { 395 RegisterContext *reg_ctx = reg_ctx_sp.get(); 396 397 data.PutHex32 (GPRRegSet); // Flavor 398 data.PutHex32 (GPRWordCount); 399 WriteRegister (reg_ctx, "eax", NULL, 4, data); 400 WriteRegister (reg_ctx, "ebx", NULL, 4, data); 401 WriteRegister (reg_ctx, "ecx", NULL, 4, data); 402 WriteRegister (reg_ctx, "edx", NULL, 4, data); 403 WriteRegister (reg_ctx, "edi", NULL, 4, data); 404 WriteRegister (reg_ctx, "esi", NULL, 4, data); 405 WriteRegister (reg_ctx, "ebp", NULL, 4, data); 406 WriteRegister (reg_ctx, "esp", NULL, 4, data); 407 WriteRegister (reg_ctx, "ss", NULL, 4, data); 408 WriteRegister (reg_ctx, "eflags", NULL, 4, data); 409 WriteRegister (reg_ctx, "eip", NULL, 4, data); 410 WriteRegister (reg_ctx, "cs", NULL, 4, data); 411 WriteRegister (reg_ctx, "ds", NULL, 4, data); 412 WriteRegister (reg_ctx, "es", NULL, 4, data); 413 WriteRegister (reg_ctx, "fs", NULL, 4, data); 414 WriteRegister (reg_ctx, "gs", NULL, 4, data); 415 416 // Write out the EXC registers 417 data.PutHex32 (EXCRegSet); 418 data.PutHex32 (EXCWordCount); 419 WriteRegister (reg_ctx, "trapno", NULL, 4, data); 420 WriteRegister (reg_ctx, "err", NULL, 4, data); 421 WriteRegister (reg_ctx, "faultvaddr", NULL, 4, data); 422 return true; 423 } 424 return false; 425 } 426 427 protected: 428 virtual int 429 DoReadGPR (lldb::tid_t tid, int flavor, GPR &gpr) 430 { 431 return 0; 432 } 433 434 virtual int 435 DoReadFPU (lldb::tid_t tid, int flavor, FPU &fpu) 436 { 437 return 0; 438 } 439 440 virtual int 441 DoReadEXC (lldb::tid_t tid, int flavor, EXC &exc) 442 { 443 return 0; 444 } 445 446 virtual int 447 DoWriteGPR (lldb::tid_t tid, int flavor, const GPR &gpr) 448 { 449 return 0; 450 } 451 452 virtual int 453 DoWriteFPU (lldb::tid_t tid, int flavor, const FPU &fpu) 454 { 455 return 0; 456 } 457 458 virtual int 459 DoWriteEXC (lldb::tid_t tid, int flavor, const EXC &exc) 460 { 461 return 0; 462 } 463 }; 464 465 class RegisterContextDarwin_arm_Mach : public RegisterContextDarwin_arm 466 { 467 public: 468 RegisterContextDarwin_arm_Mach (lldb_private::Thread &thread, const DataExtractor &data) : 469 RegisterContextDarwin_arm (thread, 0) 470 { 471 SetRegisterDataFrom_LC_THREAD (data); 472 } 473 474 virtual void 475 InvalidateAllRegisters () 476 { 477 // Do nothing... registers are always valid... 478 } 479 480 void 481 SetRegisterDataFrom_LC_THREAD (const DataExtractor &data) 482 { 483 lldb::offset_t offset = 0; 484 SetError (GPRRegSet, Read, -1); 485 SetError (FPURegSet, Read, -1); 486 SetError (EXCRegSet, Read, -1); 487 bool done = false; 488 489 while (!done) 490 { 491 int flavor = data.GetU32 (&offset); 492 uint32_t count = data.GetU32 (&offset); 493 lldb::offset_t next_thread_state = offset + (count * 4); 494 switch (flavor) 495 { 496 case GPRRegSet: 497 for (uint32_t i=0; i<count; ++i) 498 { 499 gpr.r[i] = data.GetU32(&offset); 500 } 501 502 // Note that gpr.cpsr is also copied by the above loop; this loop technically extends 503 // one element past the end of the gpr.r[] array. 504 505 SetError (GPRRegSet, Read, 0); 506 offset = next_thread_state; 507 break; 508 509 case FPURegSet: 510 { 511 uint8_t *fpu_reg_buf = (uint8_t*) &fpu.floats.s[0]; 512 const int fpu_reg_buf_size = sizeof (fpu.floats); 513 if (data.ExtractBytes (offset, fpu_reg_buf_size, eByteOrderLittle, fpu_reg_buf) == fpu_reg_buf_size) 514 { 515 offset += fpu_reg_buf_size; 516 fpu.fpscr = data.GetU32(&offset); 517 SetError (FPURegSet, Read, 0); 518 } 519 else 520 { 521 done = true; 522 } 523 } 524 offset = next_thread_state; 525 break; 526 527 case EXCRegSet: 528 if (count == 3) 529 { 530 exc.exception = data.GetU32(&offset); 531 exc.fsr = data.GetU32(&offset); 532 exc.far = data.GetU32(&offset); 533 SetError (EXCRegSet, Read, 0); 534 } 535 done = true; 536 offset = next_thread_state; 537 break; 538 539 // Unknown register set flavor, stop trying to parse. 540 default: 541 done = true; 542 } 543 } 544 } 545 546 static size_t 547 WriteRegister (RegisterContext *reg_ctx, const char *name, const char *alt_name, size_t reg_byte_size, Stream &data) 548 { 549 const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoByName(name); 550 if (reg_info == NULL) 551 reg_info = reg_ctx->GetRegisterInfoByName(alt_name); 552 if (reg_info) 553 { 554 lldb_private::RegisterValue reg_value; 555 if (reg_ctx->ReadRegister(reg_info, reg_value)) 556 { 557 if (reg_info->byte_size >= reg_byte_size) 558 data.Write(reg_value.GetBytes(), reg_byte_size); 559 else 560 { 561 data.Write(reg_value.GetBytes(), reg_info->byte_size); 562 for (size_t i=0, n = reg_byte_size - reg_info->byte_size; i<n; ++ i) 563 data.PutChar(0); 564 } 565 return reg_byte_size; 566 } 567 } 568 // Just write zeros if all else fails 569 for (size_t i=0; i<reg_byte_size; ++ i) 570 data.PutChar(0); 571 return reg_byte_size; 572 } 573 574 static bool 575 Create_LC_THREAD (Thread *thread, Stream &data) 576 { 577 RegisterContextSP reg_ctx_sp (thread->GetRegisterContext()); 578 if (reg_ctx_sp) 579 { 580 RegisterContext *reg_ctx = reg_ctx_sp.get(); 581 582 data.PutHex32 (GPRRegSet); // Flavor 583 data.PutHex32 (GPRWordCount); 584 WriteRegister (reg_ctx, "r0", NULL, 4, data); 585 WriteRegister (reg_ctx, "r1", NULL, 4, data); 586 WriteRegister (reg_ctx, "r2", NULL, 4, data); 587 WriteRegister (reg_ctx, "r3", NULL, 4, data); 588 WriteRegister (reg_ctx, "r4", NULL, 4, data); 589 WriteRegister (reg_ctx, "r5", NULL, 4, data); 590 WriteRegister (reg_ctx, "r6", NULL, 4, data); 591 WriteRegister (reg_ctx, "r7", NULL, 4, data); 592 WriteRegister (reg_ctx, "r8", NULL, 4, data); 593 WriteRegister (reg_ctx, "r9", NULL, 4, data); 594 WriteRegister (reg_ctx, "r10", NULL, 4, data); 595 WriteRegister (reg_ctx, "r11", NULL, 4, data); 596 WriteRegister (reg_ctx, "r12", NULL, 4, data); 597 WriteRegister (reg_ctx, "sp", NULL, 4, data); 598 WriteRegister (reg_ctx, "lr", NULL, 4, data); 599 WriteRegister (reg_ctx, "pc", NULL, 4, data); 600 WriteRegister (reg_ctx, "cpsr", NULL, 4, data); 601 602 // Write out the EXC registers 603 // data.PutHex32 (EXCRegSet); 604 // data.PutHex32 (EXCWordCount); 605 // WriteRegister (reg_ctx, "exception", NULL, 4, data); 606 // WriteRegister (reg_ctx, "fsr", NULL, 4, data); 607 // WriteRegister (reg_ctx, "far", NULL, 4, data); 608 return true; 609 } 610 return false; 611 } 612 613 protected: 614 virtual int 615 DoReadGPR (lldb::tid_t tid, int flavor, GPR &gpr) 616 { 617 return -1; 618 } 619 620 virtual int 621 DoReadFPU (lldb::tid_t tid, int flavor, FPU &fpu) 622 { 623 return -1; 624 } 625 626 virtual int 627 DoReadEXC (lldb::tid_t tid, int flavor, EXC &exc) 628 { 629 return -1; 630 } 631 632 virtual int 633 DoReadDBG (lldb::tid_t tid, int flavor, DBG &dbg) 634 { 635 return -1; 636 } 637 638 virtual int 639 DoWriteGPR (lldb::tid_t tid, int flavor, const GPR &gpr) 640 { 641 return 0; 642 } 643 644 virtual int 645 DoWriteFPU (lldb::tid_t tid, int flavor, const FPU &fpu) 646 { 647 return 0; 648 } 649 650 virtual int 651 DoWriteEXC (lldb::tid_t tid, int flavor, const EXC &exc) 652 { 653 return 0; 654 } 655 656 virtual int 657 DoWriteDBG (lldb::tid_t tid, int flavor, const DBG &dbg) 658 { 659 return -1; 660 } 661 }; 662 663 class RegisterContextDarwin_arm64_Mach : public RegisterContextDarwin_arm64 664 { 665 public: 666 RegisterContextDarwin_arm64_Mach (lldb_private::Thread &thread, const DataExtractor &data) : 667 RegisterContextDarwin_arm64 (thread, 0) 668 { 669 SetRegisterDataFrom_LC_THREAD (data); 670 } 671 672 virtual void 673 InvalidateAllRegisters () 674 { 675 // Do nothing... registers are always valid... 676 } 677 678 void 679 SetRegisterDataFrom_LC_THREAD (const DataExtractor &data) 680 { 681 lldb::offset_t offset = 0; 682 SetError (GPRRegSet, Read, -1); 683 SetError (FPURegSet, Read, -1); 684 SetError (EXCRegSet, Read, -1); 685 bool done = false; 686 while (!done) 687 { 688 int flavor = data.GetU32 (&offset); 689 uint32_t count = data.GetU32 (&offset); 690 lldb::offset_t next_thread_state = offset + (count * 4); 691 switch (flavor) 692 { 693 case GPRRegSet: 694 // x0-x29 + fp + lr + sp + pc (== 33 64-bit registers) plus cpsr (1 32-bit register) 695 if (count >= (33 * 2) + 1) 696 { 697 for (uint32_t i=0; i<33; ++i) 698 gpr.x[i] = data.GetU64(&offset); 699 gpr.cpsr = data.GetU32(&offset); 700 SetError (GPRRegSet, Read, 0); 701 } 702 offset = next_thread_state; 703 break; 704 case FPURegSet: 705 { 706 uint8_t *fpu_reg_buf = (uint8_t*) &fpu.v[0]; 707 const int fpu_reg_buf_size = sizeof (fpu); 708 if (fpu_reg_buf_size == count 709 && data.ExtractBytes (offset, fpu_reg_buf_size, eByteOrderLittle, fpu_reg_buf) == fpu_reg_buf_size) 710 { 711 SetError (FPURegSet, Read, 0); 712 } 713 else 714 { 715 done = true; 716 } 717 } 718 offset = next_thread_state; 719 break; 720 case EXCRegSet: 721 if (count == 4) 722 { 723 exc.far = data.GetU64(&offset); 724 exc.esr = data.GetU32(&offset); 725 exc.exception = data.GetU32(&offset); 726 SetError (EXCRegSet, Read, 0); 727 } 728 offset = next_thread_state; 729 break; 730 default: 731 done = true; 732 break; 733 } 734 } 735 } 736 737 static size_t 738 WriteRegister (RegisterContext *reg_ctx, const char *name, const char *alt_name, size_t reg_byte_size, Stream &data) 739 { 740 const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoByName(name); 741 if (reg_info == NULL) 742 reg_info = reg_ctx->GetRegisterInfoByName(alt_name); 743 if (reg_info) 744 { 745 lldb_private::RegisterValue reg_value; 746 if (reg_ctx->ReadRegister(reg_info, reg_value)) 747 { 748 if (reg_info->byte_size >= reg_byte_size) 749 data.Write(reg_value.GetBytes(), reg_byte_size); 750 else 751 { 752 data.Write(reg_value.GetBytes(), reg_info->byte_size); 753 for (size_t i=0, n = reg_byte_size - reg_info->byte_size; i<n; ++ i) 754 data.PutChar(0); 755 } 756 return reg_byte_size; 757 } 758 } 759 // Just write zeros if all else fails 760 for (size_t i=0; i<reg_byte_size; ++ i) 761 data.PutChar(0); 762 return reg_byte_size; 763 } 764 765 static bool 766 Create_LC_THREAD (Thread *thread, Stream &data) 767 { 768 RegisterContextSP reg_ctx_sp (thread->GetRegisterContext()); 769 if (reg_ctx_sp) 770 { 771 RegisterContext *reg_ctx = reg_ctx_sp.get(); 772 773 data.PutHex32 (GPRRegSet); // Flavor 774 data.PutHex32 (GPRWordCount); 775 WriteRegister (reg_ctx, "x0", NULL, 8, data); 776 WriteRegister (reg_ctx, "x1", NULL, 8, data); 777 WriteRegister (reg_ctx, "x2", NULL, 8, data); 778 WriteRegister (reg_ctx, "x3", NULL, 8, data); 779 WriteRegister (reg_ctx, "x4", NULL, 8, data); 780 WriteRegister (reg_ctx, "x5", NULL, 8, data); 781 WriteRegister (reg_ctx, "x6", NULL, 8, data); 782 WriteRegister (reg_ctx, "x7", NULL, 8, data); 783 WriteRegister (reg_ctx, "x8", NULL, 8, data); 784 WriteRegister (reg_ctx, "x9", NULL, 8, data); 785 WriteRegister (reg_ctx, "x10", NULL, 8, data); 786 WriteRegister (reg_ctx, "x11", NULL, 8, data); 787 WriteRegister (reg_ctx, "x12", NULL, 8, data); 788 WriteRegister (reg_ctx, "x13", NULL, 8, data); 789 WriteRegister (reg_ctx, "x14", NULL, 8, data); 790 WriteRegister (reg_ctx, "x15", NULL, 8, data); 791 WriteRegister (reg_ctx, "x16", NULL, 8, data); 792 WriteRegister (reg_ctx, "x17", NULL, 8, data); 793 WriteRegister (reg_ctx, "x18", NULL, 8, data); 794 WriteRegister (reg_ctx, "x19", NULL, 8, data); 795 WriteRegister (reg_ctx, "x20", NULL, 8, data); 796 WriteRegister (reg_ctx, "x21", NULL, 8, data); 797 WriteRegister (reg_ctx, "x22", NULL, 8, data); 798 WriteRegister (reg_ctx, "x23", NULL, 8, data); 799 WriteRegister (reg_ctx, "x24", NULL, 8, data); 800 WriteRegister (reg_ctx, "x25", NULL, 8, data); 801 WriteRegister (reg_ctx, "x26", NULL, 8, data); 802 WriteRegister (reg_ctx, "x27", NULL, 8, data); 803 WriteRegister (reg_ctx, "x28", NULL, 8, data); 804 WriteRegister (reg_ctx, "fp", NULL, 8, data); 805 WriteRegister (reg_ctx, "lr", NULL, 8, data); 806 WriteRegister (reg_ctx, "sp", NULL, 8, data); 807 WriteRegister (reg_ctx, "pc", NULL, 8, data); 808 WriteRegister (reg_ctx, "cpsr", NULL, 4, data); 809 810 // Write out the EXC registers 811 // data.PutHex32 (EXCRegSet); 812 // data.PutHex32 (EXCWordCount); 813 // WriteRegister (reg_ctx, "far", NULL, 8, data); 814 // WriteRegister (reg_ctx, "esr", NULL, 4, data); 815 // WriteRegister (reg_ctx, "exception", NULL, 4, data); 816 return true; 817 } 818 return false; 819 } 820 821 protected: 822 virtual int 823 DoReadGPR (lldb::tid_t tid, int flavor, GPR &gpr) 824 { 825 return -1; 826 } 827 828 virtual int 829 DoReadFPU (lldb::tid_t tid, int flavor, FPU &fpu) 830 { 831 return -1; 832 } 833 834 virtual int 835 DoReadEXC (lldb::tid_t tid, int flavor, EXC &exc) 836 { 837 return -1; 838 } 839 840 virtual int 841 DoReadDBG (lldb::tid_t tid, int flavor, DBG &dbg) 842 { 843 return -1; 844 } 845 846 virtual int 847 DoWriteGPR (lldb::tid_t tid, int flavor, const GPR &gpr) 848 { 849 return 0; 850 } 851 852 virtual int 853 DoWriteFPU (lldb::tid_t tid, int flavor, const FPU &fpu) 854 { 855 return 0; 856 } 857 858 virtual int 859 DoWriteEXC (lldb::tid_t tid, int flavor, const EXC &exc) 860 { 861 return 0; 862 } 863 864 virtual int 865 DoWriteDBG (lldb::tid_t tid, int flavor, const DBG &dbg) 866 { 867 return -1; 868 } 869 }; 870 871 static uint32_t 872 MachHeaderSizeFromMagic(uint32_t magic) 873 { 874 switch (magic) 875 { 876 case MH_MAGIC: 877 case MH_CIGAM: 878 return sizeof(struct mach_header); 879 880 case MH_MAGIC_64: 881 case MH_CIGAM_64: 882 return sizeof(struct mach_header_64); 883 break; 884 885 default: 886 break; 887 } 888 return 0; 889 } 890 891 #define MACHO_NLIST_ARM_SYMBOL_IS_THUMB 0x0008 892 893 void 894 ObjectFileMachO::Initialize() 895 { 896 PluginManager::RegisterPlugin (GetPluginNameStatic(), 897 GetPluginDescriptionStatic(), 898 CreateInstance, 899 CreateMemoryInstance, 900 GetModuleSpecifications, 901 SaveCore); 902 } 903 904 void 905 ObjectFileMachO::Terminate() 906 { 907 PluginManager::UnregisterPlugin (CreateInstance); 908 } 909 910 911 lldb_private::ConstString 912 ObjectFileMachO::GetPluginNameStatic() 913 { 914 static ConstString g_name("mach-o"); 915 return g_name; 916 } 917 918 const char * 919 ObjectFileMachO::GetPluginDescriptionStatic() 920 { 921 return "Mach-o object file reader (32 and 64 bit)"; 922 } 923 924 ObjectFile * 925 ObjectFileMachO::CreateInstance (const lldb::ModuleSP &module_sp, 926 DataBufferSP& data_sp, 927 lldb::offset_t data_offset, 928 const FileSpec* file, 929 lldb::offset_t file_offset, 930 lldb::offset_t length) 931 { 932 if (!data_sp) 933 { 934 data_sp = file->MemoryMapFileContentsIfLocal(file_offset, length); 935 data_offset = 0; 936 } 937 938 if (ObjectFileMachO::MagicBytesMatch(data_sp, data_offset, length)) 939 { 940 // Update the data to contain the entire file if it doesn't already 941 if (data_sp->GetByteSize() < length) 942 { 943 data_sp = file->MemoryMapFileContentsIfLocal(file_offset, length); 944 data_offset = 0; 945 } 946 std::unique_ptr<ObjectFile> objfile_ap(new ObjectFileMachO (module_sp, data_sp, data_offset, file, file_offset, length)); 947 if (objfile_ap.get() && objfile_ap->ParseHeader()) 948 return objfile_ap.release(); 949 } 950 return NULL; 951 } 952 953 ObjectFile * 954 ObjectFileMachO::CreateMemoryInstance (const lldb::ModuleSP &module_sp, 955 DataBufferSP& data_sp, 956 const ProcessSP &process_sp, 957 lldb::addr_t header_addr) 958 { 959 if (ObjectFileMachO::MagicBytesMatch(data_sp, 0, data_sp->GetByteSize())) 960 { 961 std::unique_ptr<ObjectFile> objfile_ap(new ObjectFileMachO (module_sp, data_sp, process_sp, header_addr)); 962 if (objfile_ap.get() && objfile_ap->ParseHeader()) 963 return objfile_ap.release(); 964 } 965 return NULL; 966 } 967 968 size_t 969 ObjectFileMachO::GetModuleSpecifications (const lldb_private::FileSpec& file, 970 lldb::DataBufferSP& data_sp, 971 lldb::offset_t data_offset, 972 lldb::offset_t file_offset, 973 lldb::offset_t length, 974 lldb_private::ModuleSpecList &specs) 975 { 976 const size_t initial_count = specs.GetSize(); 977 978 if (ObjectFileMachO::MagicBytesMatch(data_sp, 0, data_sp->GetByteSize())) 979 { 980 DataExtractor data; 981 data.SetData(data_sp); 982 llvm::MachO::mach_header header; 983 if (ParseHeader (data, &data_offset, header)) 984 { 985 size_t header_and_load_cmds = header.sizeofcmds + MachHeaderSizeFromMagic(header.magic); 986 if (header_and_load_cmds >= data_sp->GetByteSize()) 987 { 988 data_sp = file.ReadFileContents(file_offset, header_and_load_cmds); 989 data.SetData(data_sp); 990 data_offset = MachHeaderSizeFromMagic(header.magic); 991 } 992 if (data_sp) 993 { 994 ModuleSpec spec; 995 spec.GetFileSpec() = file; 996 spec.SetObjectOffset(file_offset); 997 spec.SetObjectSize(length); 998 999 if (GetArchitecture (header, data, data_offset, spec.GetArchitecture())) 1000 { 1001 if (spec.GetArchitecture().IsValid()) 1002 { 1003 GetUUID (header, data, data_offset, spec.GetUUID()); 1004 specs.Append(spec); 1005 } 1006 } 1007 } 1008 } 1009 } 1010 return specs.GetSize() - initial_count; 1011 } 1012 1013 1014 1015 const ConstString & 1016 ObjectFileMachO::GetSegmentNameTEXT() 1017 { 1018 static ConstString g_segment_name_TEXT ("__TEXT"); 1019 return g_segment_name_TEXT; 1020 } 1021 1022 const ConstString & 1023 ObjectFileMachO::GetSegmentNameDATA() 1024 { 1025 static ConstString g_segment_name_DATA ("__DATA"); 1026 return g_segment_name_DATA; 1027 } 1028 1029 const ConstString & 1030 ObjectFileMachO::GetSegmentNameOBJC() 1031 { 1032 static ConstString g_segment_name_OBJC ("__OBJC"); 1033 return g_segment_name_OBJC; 1034 } 1035 1036 const ConstString & 1037 ObjectFileMachO::GetSegmentNameLINKEDIT() 1038 { 1039 static ConstString g_section_name_LINKEDIT ("__LINKEDIT"); 1040 return g_section_name_LINKEDIT; 1041 } 1042 1043 const ConstString & 1044 ObjectFileMachO::GetSectionNameEHFrame() 1045 { 1046 static ConstString g_section_name_eh_frame ("__eh_frame"); 1047 return g_section_name_eh_frame; 1048 } 1049 1050 bool 1051 ObjectFileMachO::MagicBytesMatch (DataBufferSP& data_sp, 1052 lldb::addr_t data_offset, 1053 lldb::addr_t data_length) 1054 { 1055 DataExtractor data; 1056 data.SetData (data_sp, data_offset, data_length); 1057 lldb::offset_t offset = 0; 1058 uint32_t magic = data.GetU32(&offset); 1059 return MachHeaderSizeFromMagic(magic) != 0; 1060 } 1061 1062 1063 ObjectFileMachO::ObjectFileMachO(const lldb::ModuleSP &module_sp, 1064 DataBufferSP& data_sp, 1065 lldb::offset_t data_offset, 1066 const FileSpec* file, 1067 lldb::offset_t file_offset, 1068 lldb::offset_t length) : 1069 ObjectFile(module_sp, file, file_offset, length, data_sp, data_offset), 1070 m_mach_segments(), 1071 m_mach_sections(), 1072 m_entry_point_address(), 1073 m_thread_context_offsets(), 1074 m_thread_context_offsets_valid(false) 1075 { 1076 ::memset (&m_header, 0, sizeof(m_header)); 1077 ::memset (&m_dysymtab, 0, sizeof(m_dysymtab)); 1078 } 1079 1080 ObjectFileMachO::ObjectFileMachO (const lldb::ModuleSP &module_sp, 1081 lldb::DataBufferSP& header_data_sp, 1082 const lldb::ProcessSP &process_sp, 1083 lldb::addr_t header_addr) : 1084 ObjectFile(module_sp, process_sp, header_addr, header_data_sp), 1085 m_mach_segments(), 1086 m_mach_sections(), 1087 m_entry_point_address(), 1088 m_thread_context_offsets(), 1089 m_thread_context_offsets_valid(false) 1090 { 1091 ::memset (&m_header, 0, sizeof(m_header)); 1092 ::memset (&m_dysymtab, 0, sizeof(m_dysymtab)); 1093 } 1094 1095 ObjectFileMachO::~ObjectFileMachO() 1096 { 1097 } 1098 1099 bool 1100 ObjectFileMachO::ParseHeader (DataExtractor &data, 1101 lldb::offset_t *data_offset_ptr, 1102 llvm::MachO::mach_header &header) 1103 { 1104 data.SetByteOrder (lldb::endian::InlHostByteOrder()); 1105 // Leave magic in the original byte order 1106 header.magic = data.GetU32(data_offset_ptr); 1107 bool can_parse = false; 1108 bool is_64_bit = false; 1109 switch (header.magic) 1110 { 1111 case MH_MAGIC: 1112 data.SetByteOrder (lldb::endian::InlHostByteOrder()); 1113 data.SetAddressByteSize(4); 1114 can_parse = true; 1115 break; 1116 1117 case MH_MAGIC_64: 1118 data.SetByteOrder (lldb::endian::InlHostByteOrder()); 1119 data.SetAddressByteSize(8); 1120 can_parse = true; 1121 is_64_bit = true; 1122 break; 1123 1124 case MH_CIGAM: 1125 data.SetByteOrder(lldb::endian::InlHostByteOrder() == eByteOrderBig ? eByteOrderLittle : eByteOrderBig); 1126 data.SetAddressByteSize(4); 1127 can_parse = true; 1128 break; 1129 1130 case MH_CIGAM_64: 1131 data.SetByteOrder(lldb::endian::InlHostByteOrder() == eByteOrderBig ? eByteOrderLittle : eByteOrderBig); 1132 data.SetAddressByteSize(8); 1133 is_64_bit = true; 1134 can_parse = true; 1135 break; 1136 1137 default: 1138 break; 1139 } 1140 1141 if (can_parse) 1142 { 1143 data.GetU32(data_offset_ptr, &header.cputype, 6); 1144 if (is_64_bit) 1145 *data_offset_ptr += 4; 1146 return true; 1147 } 1148 else 1149 { 1150 memset(&header, 0, sizeof(header)); 1151 } 1152 return false; 1153 } 1154 1155 bool 1156 ObjectFileMachO::ParseHeader () 1157 { 1158 ModuleSP module_sp(GetModule()); 1159 if (module_sp) 1160 { 1161 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 1162 bool can_parse = false; 1163 lldb::offset_t offset = 0; 1164 m_data.SetByteOrder (lldb::endian::InlHostByteOrder()); 1165 // Leave magic in the original byte order 1166 m_header.magic = m_data.GetU32(&offset); 1167 switch (m_header.magic) 1168 { 1169 case MH_MAGIC: 1170 m_data.SetByteOrder (lldb::endian::InlHostByteOrder()); 1171 m_data.SetAddressByteSize(4); 1172 can_parse = true; 1173 break; 1174 1175 case MH_MAGIC_64: 1176 m_data.SetByteOrder (lldb::endian::InlHostByteOrder()); 1177 m_data.SetAddressByteSize(8); 1178 can_parse = true; 1179 break; 1180 1181 case MH_CIGAM: 1182 m_data.SetByteOrder(lldb::endian::InlHostByteOrder() == eByteOrderBig ? eByteOrderLittle : eByteOrderBig); 1183 m_data.SetAddressByteSize(4); 1184 can_parse = true; 1185 break; 1186 1187 case MH_CIGAM_64: 1188 m_data.SetByteOrder(lldb::endian::InlHostByteOrder() == eByteOrderBig ? eByteOrderLittle : eByteOrderBig); 1189 m_data.SetAddressByteSize(8); 1190 can_parse = true; 1191 break; 1192 1193 default: 1194 break; 1195 } 1196 1197 if (can_parse) 1198 { 1199 m_data.GetU32(&offset, &m_header.cputype, 6); 1200 1201 1202 ArchSpec mach_arch; 1203 1204 if (GetArchitecture (mach_arch)) 1205 { 1206 // Check if the module has a required architecture 1207 const ArchSpec &module_arch = module_sp->GetArchitecture(); 1208 if (module_arch.IsValid() && !module_arch.IsCompatibleMatch(mach_arch)) 1209 return false; 1210 1211 if (SetModulesArchitecture (mach_arch)) 1212 { 1213 const size_t header_and_lc_size = m_header.sizeofcmds + MachHeaderSizeFromMagic(m_header.magic); 1214 if (m_data.GetByteSize() < header_and_lc_size) 1215 { 1216 DataBufferSP data_sp; 1217 ProcessSP process_sp (m_process_wp.lock()); 1218 if (process_sp) 1219 { 1220 data_sp = ReadMemory (process_sp, m_memory_addr, header_and_lc_size); 1221 } 1222 else 1223 { 1224 // Read in all only the load command data from the file on disk 1225 data_sp = m_file.ReadFileContents(m_file_offset, header_and_lc_size); 1226 if (data_sp->GetByteSize() != header_and_lc_size) 1227 return false; 1228 } 1229 if (data_sp) 1230 m_data.SetData (data_sp); 1231 } 1232 } 1233 return true; 1234 } 1235 } 1236 else 1237 { 1238 memset(&m_header, 0, sizeof(struct mach_header)); 1239 } 1240 } 1241 return false; 1242 } 1243 1244 1245 ByteOrder 1246 ObjectFileMachO::GetByteOrder () const 1247 { 1248 return m_data.GetByteOrder (); 1249 } 1250 1251 bool 1252 ObjectFileMachO::IsExecutable() const 1253 { 1254 return m_header.filetype == MH_EXECUTE; 1255 } 1256 1257 uint32_t 1258 ObjectFileMachO::GetAddressByteSize () const 1259 { 1260 return m_data.GetAddressByteSize (); 1261 } 1262 1263 AddressClass 1264 ObjectFileMachO::GetAddressClass (lldb::addr_t file_addr) 1265 { 1266 Symtab *symtab = GetSymtab(); 1267 if (symtab) 1268 { 1269 Symbol *symbol = symtab->FindSymbolContainingFileAddress(file_addr); 1270 if (symbol) 1271 { 1272 if (symbol->ValueIsAddress()) 1273 { 1274 SectionSP section_sp (symbol->GetAddress().GetSection()); 1275 if (section_sp) 1276 { 1277 const lldb::SectionType section_type = section_sp->GetType(); 1278 switch (section_type) 1279 { 1280 case eSectionTypeInvalid: 1281 return eAddressClassUnknown; 1282 1283 case eSectionTypeCode: 1284 if (m_header.cputype == llvm::MachO::CPU_TYPE_ARM) 1285 { 1286 // For ARM we have a bit in the n_desc field of the symbol 1287 // that tells us ARM/Thumb which is bit 0x0008. 1288 if (symbol->GetFlags() & MACHO_NLIST_ARM_SYMBOL_IS_THUMB) 1289 return eAddressClassCodeAlternateISA; 1290 } 1291 return eAddressClassCode; 1292 1293 case eSectionTypeContainer: 1294 return eAddressClassUnknown; 1295 1296 case eSectionTypeData: 1297 case eSectionTypeDataCString: 1298 case eSectionTypeDataCStringPointers: 1299 case eSectionTypeDataSymbolAddress: 1300 case eSectionTypeData4: 1301 case eSectionTypeData8: 1302 case eSectionTypeData16: 1303 case eSectionTypeDataPointers: 1304 case eSectionTypeZeroFill: 1305 case eSectionTypeDataObjCMessageRefs: 1306 case eSectionTypeDataObjCCFStrings: 1307 return eAddressClassData; 1308 1309 case eSectionTypeDebug: 1310 case eSectionTypeDWARFDebugAbbrev: 1311 case eSectionTypeDWARFDebugAranges: 1312 case eSectionTypeDWARFDebugFrame: 1313 case eSectionTypeDWARFDebugInfo: 1314 case eSectionTypeDWARFDebugLine: 1315 case eSectionTypeDWARFDebugLoc: 1316 case eSectionTypeDWARFDebugMacInfo: 1317 case eSectionTypeDWARFDebugPubNames: 1318 case eSectionTypeDWARFDebugPubTypes: 1319 case eSectionTypeDWARFDebugRanges: 1320 case eSectionTypeDWARFDebugStr: 1321 case eSectionTypeDWARFAppleNames: 1322 case eSectionTypeDWARFAppleTypes: 1323 case eSectionTypeDWARFAppleNamespaces: 1324 case eSectionTypeDWARFAppleObjC: 1325 return eAddressClassDebug; 1326 1327 case eSectionTypeEHFrame: 1328 case eSectionTypeCompactUnwind: 1329 return eAddressClassRuntime; 1330 1331 case eSectionTypeELFSymbolTable: 1332 case eSectionTypeELFDynamicSymbols: 1333 case eSectionTypeELFRelocationEntries: 1334 case eSectionTypeELFDynamicLinkInfo: 1335 case eSectionTypeOther: 1336 return eAddressClassUnknown; 1337 } 1338 } 1339 } 1340 1341 const SymbolType symbol_type = symbol->GetType(); 1342 switch (symbol_type) 1343 { 1344 case eSymbolTypeAny: return eAddressClassUnknown; 1345 case eSymbolTypeAbsolute: return eAddressClassUnknown; 1346 1347 case eSymbolTypeCode: 1348 case eSymbolTypeTrampoline: 1349 case eSymbolTypeResolver: 1350 if (m_header.cputype == llvm::MachO::CPU_TYPE_ARM) 1351 { 1352 // For ARM we have a bit in the n_desc field of the symbol 1353 // that tells us ARM/Thumb which is bit 0x0008. 1354 if (symbol->GetFlags() & MACHO_NLIST_ARM_SYMBOL_IS_THUMB) 1355 return eAddressClassCodeAlternateISA; 1356 } 1357 return eAddressClassCode; 1358 1359 case eSymbolTypeData: return eAddressClassData; 1360 case eSymbolTypeRuntime: return eAddressClassRuntime; 1361 case eSymbolTypeException: return eAddressClassRuntime; 1362 case eSymbolTypeSourceFile: return eAddressClassDebug; 1363 case eSymbolTypeHeaderFile: return eAddressClassDebug; 1364 case eSymbolTypeObjectFile: return eAddressClassDebug; 1365 case eSymbolTypeCommonBlock: return eAddressClassDebug; 1366 case eSymbolTypeBlock: return eAddressClassDebug; 1367 case eSymbolTypeLocal: return eAddressClassData; 1368 case eSymbolTypeParam: return eAddressClassData; 1369 case eSymbolTypeVariable: return eAddressClassData; 1370 case eSymbolTypeVariableType: return eAddressClassDebug; 1371 case eSymbolTypeLineEntry: return eAddressClassDebug; 1372 case eSymbolTypeLineHeader: return eAddressClassDebug; 1373 case eSymbolTypeScopeBegin: return eAddressClassDebug; 1374 case eSymbolTypeScopeEnd: return eAddressClassDebug; 1375 case eSymbolTypeAdditional: return eAddressClassUnknown; 1376 case eSymbolTypeCompiler: return eAddressClassDebug; 1377 case eSymbolTypeInstrumentation:return eAddressClassDebug; 1378 case eSymbolTypeUndefined: return eAddressClassUnknown; 1379 case eSymbolTypeObjCClass: return eAddressClassRuntime; 1380 case eSymbolTypeObjCMetaClass: return eAddressClassRuntime; 1381 case eSymbolTypeObjCIVar: return eAddressClassRuntime; 1382 case eSymbolTypeReExported: return eAddressClassRuntime; 1383 } 1384 } 1385 } 1386 return eAddressClassUnknown; 1387 } 1388 1389 Symtab * 1390 ObjectFileMachO::GetSymtab() 1391 { 1392 ModuleSP module_sp(GetModule()); 1393 if (module_sp) 1394 { 1395 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 1396 if (m_symtab_ap.get() == NULL) 1397 { 1398 m_symtab_ap.reset(new Symtab(this)); 1399 Mutex::Locker symtab_locker (m_symtab_ap->GetMutex()); 1400 ParseSymtab (); 1401 m_symtab_ap->Finalize (); 1402 } 1403 } 1404 return m_symtab_ap.get(); 1405 } 1406 1407 bool 1408 ObjectFileMachO::IsStripped () 1409 { 1410 if (m_dysymtab.cmd == 0) 1411 { 1412 ModuleSP module_sp(GetModule()); 1413 if (module_sp) 1414 { 1415 lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); 1416 for (uint32_t i=0; i<m_header.ncmds; ++i) 1417 { 1418 const lldb::offset_t load_cmd_offset = offset; 1419 1420 load_command lc; 1421 if (m_data.GetU32(&offset, &lc.cmd, 2) == NULL) 1422 break; 1423 if (lc.cmd == LC_DYSYMTAB) 1424 { 1425 m_dysymtab.cmd = lc.cmd; 1426 m_dysymtab.cmdsize = lc.cmdsize; 1427 if (m_data.GetU32 (&offset, &m_dysymtab.ilocalsym, (sizeof(m_dysymtab) / sizeof(uint32_t)) - 2) == NULL) 1428 { 1429 // Clear m_dysymtab if we were unable to read all items from the load command 1430 ::memset (&m_dysymtab, 0, sizeof(m_dysymtab)); 1431 } 1432 } 1433 offset = load_cmd_offset + lc.cmdsize; 1434 } 1435 } 1436 } 1437 if (m_dysymtab.cmd) 1438 return m_dysymtab.nlocalsym <= 1; 1439 return false; 1440 } 1441 1442 void 1443 ObjectFileMachO::CreateSections (SectionList &unified_section_list) 1444 { 1445 if (!m_sections_ap.get()) 1446 { 1447 m_sections_ap.reset(new SectionList()); 1448 1449 const bool is_dsym = (m_header.filetype == MH_DSYM); 1450 lldb::user_id_t segID = 0; 1451 lldb::user_id_t sectID = 0; 1452 lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); 1453 uint32_t i; 1454 const bool is_core = GetType() == eTypeCoreFile; 1455 //bool dump_sections = false; 1456 ModuleSP module_sp (GetModule()); 1457 // First look up any LC_ENCRYPTION_INFO load commands 1458 typedef RangeArray<uint32_t, uint32_t, 8> EncryptedFileRanges; 1459 EncryptedFileRanges encrypted_file_ranges; 1460 encryption_info_command encryption_cmd; 1461 for (i=0; i<m_header.ncmds; ++i) 1462 { 1463 const lldb::offset_t load_cmd_offset = offset; 1464 if (m_data.GetU32(&offset, &encryption_cmd, 2) == NULL) 1465 break; 1466 1467 // LC_ENCRYPTION_INFO and LC_ENCRYPTION_INFO_64 have the same sizes for 1468 // the 3 fields we care about, so treat them the same. 1469 if (encryption_cmd.cmd == LC_ENCRYPTION_INFO || encryption_cmd.cmd == LC_ENCRYPTION_INFO_64) 1470 { 1471 if (m_data.GetU32(&offset, &encryption_cmd.cryptoff, 3)) 1472 { 1473 if (encryption_cmd.cryptid != 0) 1474 { 1475 EncryptedFileRanges::Entry entry; 1476 entry.SetRangeBase(encryption_cmd.cryptoff); 1477 entry.SetByteSize(encryption_cmd.cryptsize); 1478 encrypted_file_ranges.Append(entry); 1479 } 1480 } 1481 } 1482 offset = load_cmd_offset + encryption_cmd.cmdsize; 1483 } 1484 1485 bool section_file_addresses_changed = false; 1486 1487 offset = MachHeaderSizeFromMagic(m_header.magic); 1488 1489 struct segment_command_64 load_cmd; 1490 for (i=0; i<m_header.ncmds; ++i) 1491 { 1492 const lldb::offset_t load_cmd_offset = offset; 1493 if (m_data.GetU32(&offset, &load_cmd, 2) == NULL) 1494 break; 1495 1496 if (load_cmd.cmd == LC_SEGMENT || load_cmd.cmd == LC_SEGMENT_64) 1497 { 1498 if (m_data.GetU8(&offset, (uint8_t*)load_cmd.segname, 16)) 1499 { 1500 bool add_section = true; 1501 bool add_to_unified = true; 1502 ConstString const_segname (load_cmd.segname, std::min<size_t>(strlen(load_cmd.segname), sizeof(load_cmd.segname))); 1503 1504 SectionSP unified_section_sp(unified_section_list.FindSectionByName(const_segname)); 1505 if (is_dsym && unified_section_sp) 1506 { 1507 if (const_segname == GetSegmentNameLINKEDIT()) 1508 { 1509 // We need to keep the __LINKEDIT segment private to this object file only 1510 add_to_unified = false; 1511 } 1512 else 1513 { 1514 // This is the dSYM file and this section has already been created by 1515 // the object file, no need to create it. 1516 add_section = false; 1517 } 1518 } 1519 load_cmd.vmaddr = m_data.GetAddress(&offset); 1520 load_cmd.vmsize = m_data.GetAddress(&offset); 1521 load_cmd.fileoff = m_data.GetAddress(&offset); 1522 load_cmd.filesize = m_data.GetAddress(&offset); 1523 if (m_length != 0 && load_cmd.filesize != 0) 1524 { 1525 if (load_cmd.fileoff > m_length) 1526 { 1527 // We have a load command that says it extends past the end of the file. This is likely 1528 // a corrupt file. We don't have any way to return an error condition here (this method 1529 // was likely invoked from something like ObjectFile::GetSectionList()) -- all we can do 1530 // is null out the SectionList vector and if a process has been set up, dump a message 1531 // to stdout. The most common case here is core file debugging with a truncated file. 1532 const char *lc_segment_name = load_cmd.cmd == LC_SEGMENT_64 ? "LC_SEGMENT_64" : "LC_SEGMENT"; 1533 module_sp->ReportWarning("load command %u %s has a fileoff (0x%" PRIx64 ") that extends beyond the end of the file (0x%" PRIx64 "), ignoring this section", 1534 i, 1535 lc_segment_name, 1536 load_cmd.fileoff, 1537 m_length); 1538 1539 load_cmd.fileoff = 0; 1540 load_cmd.filesize = 0; 1541 } 1542 1543 if (load_cmd.fileoff + load_cmd.filesize > m_length) 1544 { 1545 // We have a load command that says it extends past the end of the file. This is likely 1546 // a corrupt file. We don't have any way to return an error condition here (this method 1547 // was likely invoked from something like ObjectFile::GetSectionList()) -- all we can do 1548 // is null out the SectionList vector and if a process has been set up, dump a message 1549 // to stdout. The most common case here is core file debugging with a truncated file. 1550 const char *lc_segment_name = load_cmd.cmd == LC_SEGMENT_64 ? "LC_SEGMENT_64" : "LC_SEGMENT"; 1551 GetModule()->ReportWarning("load command %u %s has a fileoff + filesize (0x%" PRIx64 ") that extends beyond the end of the file (0x%" PRIx64 "), the segment will be truncated to match", 1552 i, 1553 lc_segment_name, 1554 load_cmd.fileoff + load_cmd.filesize, 1555 m_length); 1556 1557 // Tuncase the length 1558 load_cmd.filesize = m_length - load_cmd.fileoff; 1559 } 1560 } 1561 if (m_data.GetU32(&offset, &load_cmd.maxprot, 4)) 1562 { 1563 1564 const bool segment_is_encrypted = (load_cmd.flags & SG_PROTECTED_VERSION_1) != 0; 1565 1566 // Keep a list of mach segments around in case we need to 1567 // get at data that isn't stored in the abstracted Sections. 1568 m_mach_segments.push_back (load_cmd); 1569 1570 // Use a segment ID of the segment index shifted left by 8 so they 1571 // never conflict with any of the sections. 1572 SectionSP segment_sp; 1573 if (add_section && (const_segname || is_core)) 1574 { 1575 segment_sp.reset(new Section (module_sp, // Module to which this section belongs 1576 this, // Object file to which this sections belongs 1577 ++segID << 8, // Section ID is the 1 based segment index shifted right by 8 bits as not to collide with any of the 256 section IDs that are possible 1578 const_segname, // Name of this section 1579 eSectionTypeContainer, // This section is a container of other sections. 1580 load_cmd.vmaddr, // File VM address == addresses as they are found in the object file 1581 load_cmd.vmsize, // VM size in bytes of this section 1582 load_cmd.fileoff, // Offset to the data for this section in the file 1583 load_cmd.filesize, // Size in bytes of this section as found in the file 1584 0, // Segments have no alignment information 1585 load_cmd.flags)); // Flags for this section 1586 1587 segment_sp->SetIsEncrypted (segment_is_encrypted); 1588 m_sections_ap->AddSection(segment_sp); 1589 if (add_to_unified) 1590 unified_section_list.AddSection(segment_sp); 1591 } 1592 else if (unified_section_sp) 1593 { 1594 if (is_dsym && unified_section_sp->GetFileAddress() != load_cmd.vmaddr) 1595 { 1596 // Check to see if the module was read from memory? 1597 if (module_sp->GetObjectFile()->GetHeaderAddress().IsValid()) 1598 { 1599 // We have a module that is in memory and needs to have its 1600 // file address adjusted. We need to do this because when we 1601 // load a file from memory, its addresses will be slid already, 1602 // yet the addresses in the new symbol file will still be unslid. 1603 // Since everything is stored as section offset, this shouldn't 1604 // cause any problems. 1605 1606 // Make sure we've parsed the symbol table from the 1607 // ObjectFile before we go around changing its Sections. 1608 module_sp->GetObjectFile()->GetSymtab(); 1609 // eh_frame would present the same problems but we parse that on 1610 // a per-function basis as-needed so it's more difficult to 1611 // remove its use of the Sections. Realistically, the environments 1612 // where this code path will be taken will not have eh_frame sections. 1613 1614 unified_section_sp->SetFileAddress(load_cmd.vmaddr); 1615 1616 // Notify the module that the section addresses have been changed once 1617 // we're done so any file-address caches can be updated. 1618 section_file_addresses_changed = true; 1619 } 1620 } 1621 m_sections_ap->AddSection(unified_section_sp); 1622 } 1623 1624 struct section_64 sect64; 1625 ::memset (§64, 0, sizeof(sect64)); 1626 // Push a section into our mach sections for the section at 1627 // index zero (NO_SECT) if we don't have any mach sections yet... 1628 if (m_mach_sections.empty()) 1629 m_mach_sections.push_back(sect64); 1630 uint32_t segment_sect_idx; 1631 const lldb::user_id_t first_segment_sectID = sectID + 1; 1632 1633 1634 const uint32_t num_u32s = load_cmd.cmd == LC_SEGMENT ? 7 : 8; 1635 for (segment_sect_idx=0; segment_sect_idx<load_cmd.nsects; ++segment_sect_idx) 1636 { 1637 if (m_data.GetU8(&offset, (uint8_t*)sect64.sectname, sizeof(sect64.sectname)) == NULL) 1638 break; 1639 if (m_data.GetU8(&offset, (uint8_t*)sect64.segname, sizeof(sect64.segname)) == NULL) 1640 break; 1641 sect64.addr = m_data.GetAddress(&offset); 1642 sect64.size = m_data.GetAddress(&offset); 1643 1644 if (m_data.GetU32(&offset, §64.offset, num_u32s) == NULL) 1645 break; 1646 1647 // Keep a list of mach sections around in case we need to 1648 // get at data that isn't stored in the abstracted Sections. 1649 m_mach_sections.push_back (sect64); 1650 1651 if (add_section) 1652 { 1653 ConstString section_name (sect64.sectname, std::min<size_t>(strlen(sect64.sectname), sizeof(sect64.sectname))); 1654 if (!const_segname) 1655 { 1656 // We have a segment with no name so we need to conjure up 1657 // segments that correspond to the section's segname if there 1658 // isn't already such a section. If there is such a section, 1659 // we resize the section so that it spans all sections. 1660 // We also mark these sections as fake so address matches don't 1661 // hit if they land in the gaps between the child sections. 1662 const_segname.SetTrimmedCStringWithLength(sect64.segname, sizeof(sect64.segname)); 1663 segment_sp = unified_section_list.FindSectionByName (const_segname); 1664 if (segment_sp.get()) 1665 { 1666 Section *segment = segment_sp.get(); 1667 // Grow the section size as needed. 1668 const lldb::addr_t sect64_min_addr = sect64.addr; 1669 const lldb::addr_t sect64_max_addr = sect64_min_addr + sect64.size; 1670 const lldb::addr_t curr_seg_byte_size = segment->GetByteSize(); 1671 const lldb::addr_t curr_seg_min_addr = segment->GetFileAddress(); 1672 const lldb::addr_t curr_seg_max_addr = curr_seg_min_addr + curr_seg_byte_size; 1673 if (sect64_min_addr >= curr_seg_min_addr) 1674 { 1675 const lldb::addr_t new_seg_byte_size = sect64_max_addr - curr_seg_min_addr; 1676 // Only grow the section size if needed 1677 if (new_seg_byte_size > curr_seg_byte_size) 1678 segment->SetByteSize (new_seg_byte_size); 1679 } 1680 else 1681 { 1682 // We need to change the base address of the segment and 1683 // adjust the child section offsets for all existing children. 1684 const lldb::addr_t slide_amount = sect64_min_addr - curr_seg_min_addr; 1685 segment->Slide(slide_amount, false); 1686 segment->GetChildren().Slide(-slide_amount, false); 1687 segment->SetByteSize (curr_seg_max_addr - sect64_min_addr); 1688 } 1689 1690 // Grow the section size as needed. 1691 if (sect64.offset) 1692 { 1693 const lldb::addr_t segment_min_file_offset = segment->GetFileOffset(); 1694 const lldb::addr_t segment_max_file_offset = segment_min_file_offset + segment->GetFileSize(); 1695 1696 const lldb::addr_t section_min_file_offset = sect64.offset; 1697 const lldb::addr_t section_max_file_offset = section_min_file_offset + sect64.size; 1698 const lldb::addr_t new_file_offset = std::min (section_min_file_offset, segment_min_file_offset); 1699 const lldb::addr_t new_file_size = std::max (section_max_file_offset, segment_max_file_offset) - new_file_offset; 1700 segment->SetFileOffset (new_file_offset); 1701 segment->SetFileSize (new_file_size); 1702 } 1703 } 1704 else 1705 { 1706 // Create a fake section for the section's named segment 1707 segment_sp.reset(new Section (segment_sp, // Parent section 1708 module_sp, // Module to which this section belongs 1709 this, // Object file to which this section belongs 1710 ++segID << 8, // Section ID is the 1 based segment index shifted right by 8 bits as not to collide with any of the 256 section IDs that are possible 1711 const_segname, // Name of this section 1712 eSectionTypeContainer, // This section is a container of other sections. 1713 sect64.addr, // File VM address == addresses as they are found in the object file 1714 sect64.size, // VM size in bytes of this section 1715 sect64.offset, // Offset to the data for this section in the file 1716 sect64.offset ? sect64.size : 0, // Size in bytes of this section as found in the file 1717 sect64.align, 1718 load_cmd.flags)); // Flags for this section 1719 segment_sp->SetIsFake(true); 1720 1721 m_sections_ap->AddSection(segment_sp); 1722 if (add_to_unified) 1723 unified_section_list.AddSection(segment_sp); 1724 segment_sp->SetIsEncrypted (segment_is_encrypted); 1725 } 1726 } 1727 assert (segment_sp.get()); 1728 1729 lldb::SectionType sect_type = eSectionTypeOther; 1730 1731 if (sect64.flags & (S_ATTR_PURE_INSTRUCTIONS | S_ATTR_SOME_INSTRUCTIONS)) 1732 sect_type = eSectionTypeCode; 1733 else 1734 { 1735 uint32_t mach_sect_type = sect64.flags & SECTION_TYPE; 1736 static ConstString g_sect_name_objc_data ("__objc_data"); 1737 static ConstString g_sect_name_objc_msgrefs ("__objc_msgrefs"); 1738 static ConstString g_sect_name_objc_selrefs ("__objc_selrefs"); 1739 static ConstString g_sect_name_objc_classrefs ("__objc_classrefs"); 1740 static ConstString g_sect_name_objc_superrefs ("__objc_superrefs"); 1741 static ConstString g_sect_name_objc_const ("__objc_const"); 1742 static ConstString g_sect_name_objc_classlist ("__objc_classlist"); 1743 static ConstString g_sect_name_cfstring ("__cfstring"); 1744 1745 static ConstString g_sect_name_dwarf_debug_abbrev ("__debug_abbrev"); 1746 static ConstString g_sect_name_dwarf_debug_aranges ("__debug_aranges"); 1747 static ConstString g_sect_name_dwarf_debug_frame ("__debug_frame"); 1748 static ConstString g_sect_name_dwarf_debug_info ("__debug_info"); 1749 static ConstString g_sect_name_dwarf_debug_line ("__debug_line"); 1750 static ConstString g_sect_name_dwarf_debug_loc ("__debug_loc"); 1751 static ConstString g_sect_name_dwarf_debug_macinfo ("__debug_macinfo"); 1752 static ConstString g_sect_name_dwarf_debug_pubnames ("__debug_pubnames"); 1753 static ConstString g_sect_name_dwarf_debug_pubtypes ("__debug_pubtypes"); 1754 static ConstString g_sect_name_dwarf_debug_ranges ("__debug_ranges"); 1755 static ConstString g_sect_name_dwarf_debug_str ("__debug_str"); 1756 static ConstString g_sect_name_dwarf_apple_names ("__apple_names"); 1757 static ConstString g_sect_name_dwarf_apple_types ("__apple_types"); 1758 static ConstString g_sect_name_dwarf_apple_namespaces ("__apple_namespac"); 1759 static ConstString g_sect_name_dwarf_apple_objc ("__apple_objc"); 1760 static ConstString g_sect_name_eh_frame ("__eh_frame"); 1761 static ConstString g_sect_name_compact_unwind ("__unwind_info"); 1762 static ConstString g_sect_name_text ("__text"); 1763 static ConstString g_sect_name_data ("__data"); 1764 1765 1766 if (section_name == g_sect_name_dwarf_debug_abbrev) 1767 sect_type = eSectionTypeDWARFDebugAbbrev; 1768 else if (section_name == g_sect_name_dwarf_debug_aranges) 1769 sect_type = eSectionTypeDWARFDebugAranges; 1770 else if (section_name == g_sect_name_dwarf_debug_frame) 1771 sect_type = eSectionTypeDWARFDebugFrame; 1772 else if (section_name == g_sect_name_dwarf_debug_info) 1773 sect_type = eSectionTypeDWARFDebugInfo; 1774 else if (section_name == g_sect_name_dwarf_debug_line) 1775 sect_type = eSectionTypeDWARFDebugLine; 1776 else if (section_name == g_sect_name_dwarf_debug_loc) 1777 sect_type = eSectionTypeDWARFDebugLoc; 1778 else if (section_name == g_sect_name_dwarf_debug_macinfo) 1779 sect_type = eSectionTypeDWARFDebugMacInfo; 1780 else if (section_name == g_sect_name_dwarf_debug_pubnames) 1781 sect_type = eSectionTypeDWARFDebugPubNames; 1782 else if (section_name == g_sect_name_dwarf_debug_pubtypes) 1783 sect_type = eSectionTypeDWARFDebugPubTypes; 1784 else if (section_name == g_sect_name_dwarf_debug_ranges) 1785 sect_type = eSectionTypeDWARFDebugRanges; 1786 else if (section_name == g_sect_name_dwarf_debug_str) 1787 sect_type = eSectionTypeDWARFDebugStr; 1788 else if (section_name == g_sect_name_dwarf_apple_names) 1789 sect_type = eSectionTypeDWARFAppleNames; 1790 else if (section_name == g_sect_name_dwarf_apple_types) 1791 sect_type = eSectionTypeDWARFAppleTypes; 1792 else if (section_name == g_sect_name_dwarf_apple_namespaces) 1793 sect_type = eSectionTypeDWARFAppleNamespaces; 1794 else if (section_name == g_sect_name_dwarf_apple_objc) 1795 sect_type = eSectionTypeDWARFAppleObjC; 1796 else if (section_name == g_sect_name_objc_selrefs) 1797 sect_type = eSectionTypeDataCStringPointers; 1798 else if (section_name == g_sect_name_objc_msgrefs) 1799 sect_type = eSectionTypeDataObjCMessageRefs; 1800 else if (section_name == g_sect_name_eh_frame) 1801 sect_type = eSectionTypeEHFrame; 1802 else if (section_name == g_sect_name_compact_unwind) 1803 sect_type = eSectionTypeCompactUnwind; 1804 else if (section_name == g_sect_name_cfstring) 1805 sect_type = eSectionTypeDataObjCCFStrings; 1806 else if (section_name == g_sect_name_objc_data || 1807 section_name == g_sect_name_objc_classrefs || 1808 section_name == g_sect_name_objc_superrefs || 1809 section_name == g_sect_name_objc_const || 1810 section_name == g_sect_name_objc_classlist) 1811 { 1812 sect_type = eSectionTypeDataPointers; 1813 } 1814 1815 if (sect_type == eSectionTypeOther) 1816 { 1817 switch (mach_sect_type) 1818 { 1819 // TODO: categorize sections by other flags for regular sections 1820 case S_REGULAR: 1821 if (section_name == g_sect_name_text) 1822 sect_type = eSectionTypeCode; 1823 else if (section_name == g_sect_name_data) 1824 sect_type = eSectionTypeData; 1825 else 1826 sect_type = eSectionTypeOther; 1827 break; 1828 case S_ZEROFILL: sect_type = eSectionTypeZeroFill; break; 1829 case S_CSTRING_LITERALS: sect_type = eSectionTypeDataCString; break; // section with only literal C strings 1830 case S_4BYTE_LITERALS: sect_type = eSectionTypeData4; break; // section with only 4 byte literals 1831 case S_8BYTE_LITERALS: sect_type = eSectionTypeData8; break; // section with only 8 byte literals 1832 case S_LITERAL_POINTERS: sect_type = eSectionTypeDataPointers; break; // section with only pointers to literals 1833 case S_NON_LAZY_SYMBOL_POINTERS: sect_type = eSectionTypeDataPointers; break; // section with only non-lazy symbol pointers 1834 case S_LAZY_SYMBOL_POINTERS: sect_type = eSectionTypeDataPointers; break; // section with only lazy symbol pointers 1835 case S_SYMBOL_STUBS: sect_type = eSectionTypeCode; break; // section with only symbol stubs, byte size of stub in the reserved2 field 1836 case S_MOD_INIT_FUNC_POINTERS: sect_type = eSectionTypeDataPointers; break; // section with only function pointers for initialization 1837 case S_MOD_TERM_FUNC_POINTERS: sect_type = eSectionTypeDataPointers; break; // section with only function pointers for termination 1838 case S_COALESCED: sect_type = eSectionTypeOther; break; 1839 case S_GB_ZEROFILL: sect_type = eSectionTypeZeroFill; break; 1840 case S_INTERPOSING: sect_type = eSectionTypeCode; break; // section with only pairs of function pointers for interposing 1841 case S_16BYTE_LITERALS: sect_type = eSectionTypeData16; break; // section with only 16 byte literals 1842 case S_DTRACE_DOF: sect_type = eSectionTypeDebug; break; 1843 case S_LAZY_DYLIB_SYMBOL_POINTERS: sect_type = eSectionTypeDataPointers; break; 1844 default: break; 1845 } 1846 } 1847 } 1848 1849 SectionSP section_sp(new Section (segment_sp, 1850 module_sp, 1851 this, 1852 ++sectID, 1853 section_name, 1854 sect_type, 1855 sect64.addr - segment_sp->GetFileAddress(), 1856 sect64.size, 1857 sect64.offset, 1858 sect64.offset == 0 ? 0 : sect64.size, 1859 sect64.align, 1860 sect64.flags)); 1861 // Set the section to be encrypted to match the segment 1862 1863 bool section_is_encrypted = false; 1864 if (!segment_is_encrypted && load_cmd.filesize != 0) 1865 section_is_encrypted = encrypted_file_ranges.FindEntryThatContains(sect64.offset) != NULL; 1866 1867 section_sp->SetIsEncrypted (segment_is_encrypted || section_is_encrypted); 1868 segment_sp->GetChildren().AddSection(section_sp); 1869 1870 if (segment_sp->IsFake()) 1871 { 1872 segment_sp.reset(); 1873 const_segname.Clear(); 1874 } 1875 } 1876 } 1877 if (segment_sp && is_dsym) 1878 { 1879 if (first_segment_sectID <= sectID) 1880 { 1881 lldb::user_id_t sect_uid; 1882 for (sect_uid = first_segment_sectID; sect_uid <= sectID; ++sect_uid) 1883 { 1884 SectionSP curr_section_sp(segment_sp->GetChildren().FindSectionByID (sect_uid)); 1885 SectionSP next_section_sp; 1886 if (sect_uid + 1 <= sectID) 1887 next_section_sp = segment_sp->GetChildren().FindSectionByID (sect_uid+1); 1888 1889 if (curr_section_sp.get()) 1890 { 1891 if (curr_section_sp->GetByteSize() == 0) 1892 { 1893 if (next_section_sp.get() != NULL) 1894 curr_section_sp->SetByteSize ( next_section_sp->GetFileAddress() - curr_section_sp->GetFileAddress() ); 1895 else 1896 curr_section_sp->SetByteSize ( load_cmd.vmsize ); 1897 } 1898 } 1899 } 1900 } 1901 } 1902 } 1903 } 1904 } 1905 else if (load_cmd.cmd == LC_DYSYMTAB) 1906 { 1907 m_dysymtab.cmd = load_cmd.cmd; 1908 m_dysymtab.cmdsize = load_cmd.cmdsize; 1909 m_data.GetU32 (&offset, &m_dysymtab.ilocalsym, (sizeof(m_dysymtab) / sizeof(uint32_t)) - 2); 1910 } 1911 1912 offset = load_cmd_offset + load_cmd.cmdsize; 1913 } 1914 1915 1916 if (section_file_addresses_changed && module_sp.get()) 1917 { 1918 module_sp->SectionFileAddressesChanged(); 1919 } 1920 } 1921 } 1922 1923 class MachSymtabSectionInfo 1924 { 1925 public: 1926 1927 MachSymtabSectionInfo (SectionList *section_list) : 1928 m_section_list (section_list), 1929 m_section_infos() 1930 { 1931 // Get the number of sections down to a depth of 1 to include 1932 // all segments and their sections, but no other sections that 1933 // may be added for debug map or 1934 m_section_infos.resize(section_list->GetNumSections(1)); 1935 } 1936 1937 1938 SectionSP 1939 GetSection (uint8_t n_sect, addr_t file_addr) 1940 { 1941 if (n_sect == 0) 1942 return SectionSP(); 1943 if (n_sect < m_section_infos.size()) 1944 { 1945 if (!m_section_infos[n_sect].section_sp) 1946 { 1947 SectionSP section_sp (m_section_list->FindSectionByID (n_sect)); 1948 m_section_infos[n_sect].section_sp = section_sp; 1949 if (section_sp) 1950 { 1951 m_section_infos[n_sect].vm_range.SetBaseAddress (section_sp->GetFileAddress()); 1952 m_section_infos[n_sect].vm_range.SetByteSize (section_sp->GetByteSize()); 1953 } 1954 else 1955 { 1956 Host::SystemLog (Host::eSystemLogError, "error: unable to find section for section %u\n", n_sect); 1957 } 1958 } 1959 if (m_section_infos[n_sect].vm_range.Contains(file_addr)) 1960 { 1961 // Symbol is in section. 1962 return m_section_infos[n_sect].section_sp; 1963 } 1964 else if (m_section_infos[n_sect].vm_range.GetByteSize () == 0 && 1965 m_section_infos[n_sect].vm_range.GetBaseAddress() == file_addr) 1966 { 1967 // Symbol is in section with zero size, but has the same start 1968 // address as the section. This can happen with linker symbols 1969 // (symbols that start with the letter 'l' or 'L'. 1970 return m_section_infos[n_sect].section_sp; 1971 } 1972 } 1973 return m_section_list->FindSectionContainingFileAddress(file_addr); 1974 } 1975 1976 protected: 1977 struct SectionInfo 1978 { 1979 SectionInfo () : 1980 vm_range(), 1981 section_sp () 1982 { 1983 } 1984 1985 VMRange vm_range; 1986 SectionSP section_sp; 1987 }; 1988 SectionList *m_section_list; 1989 std::vector<SectionInfo> m_section_infos; 1990 }; 1991 1992 struct TrieEntry 1993 { 1994 TrieEntry () : 1995 name(), 1996 address(LLDB_INVALID_ADDRESS), 1997 flags (0), 1998 other(0), 1999 import_name() 2000 { 2001 } 2002 2003 void 2004 Clear () 2005 { 2006 name.Clear(); 2007 address = LLDB_INVALID_ADDRESS; 2008 flags = 0; 2009 other = 0; 2010 import_name.Clear(); 2011 } 2012 2013 void 2014 Dump () const 2015 { 2016 printf ("0x%16.16llx 0x%16.16llx 0x%16.16llx \"%s\"", 2017 static_cast<unsigned long long>(address), 2018 static_cast<unsigned long long>(flags), 2019 static_cast<unsigned long long>(other), name.GetCString()); 2020 if (import_name) 2021 printf (" -> \"%s\"\n", import_name.GetCString()); 2022 else 2023 printf ("\n"); 2024 } 2025 ConstString name; 2026 uint64_t address; 2027 uint64_t flags; 2028 uint64_t other; 2029 ConstString import_name; 2030 }; 2031 2032 struct TrieEntryWithOffset 2033 { 2034 lldb::offset_t nodeOffset; 2035 TrieEntry entry; 2036 2037 TrieEntryWithOffset (lldb::offset_t offset) : 2038 nodeOffset (offset), 2039 entry() 2040 { 2041 } 2042 2043 void 2044 Dump (uint32_t idx) const 2045 { 2046 printf ("[%3u] 0x%16.16llx: ", idx, 2047 static_cast<unsigned long long>(nodeOffset)); 2048 entry.Dump(); 2049 } 2050 2051 bool 2052 operator<(const TrieEntryWithOffset& other) const 2053 { 2054 return ( nodeOffset < other.nodeOffset ); 2055 } 2056 }; 2057 2058 static void 2059 ParseTrieEntries (DataExtractor &data, 2060 lldb::offset_t offset, 2061 std::vector<llvm::StringRef> &nameSlices, 2062 std::set<lldb::addr_t> &resolver_addresses, 2063 std::vector<TrieEntryWithOffset>& output) 2064 { 2065 if (!data.ValidOffset(offset)) 2066 return; 2067 2068 const uint64_t terminalSize = data.GetULEB128(&offset); 2069 lldb::offset_t children_offset = offset + terminalSize; 2070 if ( terminalSize != 0 ) { 2071 TrieEntryWithOffset e (offset); 2072 e.entry.flags = data.GetULEB128(&offset); 2073 const char *import_name = NULL; 2074 if ( e.entry.flags & EXPORT_SYMBOL_FLAGS_REEXPORT ) { 2075 e.entry.address = 0; 2076 e.entry.other = data.GetULEB128(&offset); // dylib ordinal 2077 import_name = data.GetCStr(&offset); 2078 } 2079 else { 2080 e.entry.address = data.GetULEB128(&offset); 2081 if ( e.entry.flags & EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER ) 2082 { 2083 //resolver_addresses.insert(e.entry.address); 2084 e.entry.other = data.GetULEB128(&offset); 2085 resolver_addresses.insert(e.entry.other); 2086 } 2087 else 2088 e.entry.other = 0; 2089 } 2090 // Only add symbols that are reexport symbols with a valid import name 2091 if (EXPORT_SYMBOL_FLAGS_REEXPORT & e.entry.flags && import_name && import_name[0]) 2092 { 2093 std::string name; 2094 if (!nameSlices.empty()) 2095 { 2096 for (auto name_slice: nameSlices) 2097 name.append(name_slice.data(), name_slice.size()); 2098 } 2099 if (name.size() > 1) 2100 { 2101 // Skip the leading '_' 2102 e.entry.name.SetCStringWithLength(name.c_str() + 1,name.size() - 1); 2103 } 2104 if (import_name) 2105 { 2106 // Skip the leading '_' 2107 e.entry.import_name.SetCString(import_name+1); 2108 } 2109 output.push_back(e); 2110 } 2111 } 2112 2113 const uint8_t childrenCount = data.GetU8(&children_offset); 2114 for (uint8_t i=0; i < childrenCount; ++i) { 2115 nameSlices.push_back(data.GetCStr(&children_offset)); 2116 lldb::offset_t childNodeOffset = data.GetULEB128(&children_offset); 2117 if (childNodeOffset) 2118 { 2119 ParseTrieEntries(data, 2120 childNodeOffset, 2121 nameSlices, 2122 resolver_addresses, 2123 output); 2124 } 2125 nameSlices.pop_back(); 2126 } 2127 } 2128 2129 size_t 2130 ObjectFileMachO::ParseSymtab () 2131 { 2132 Timer scoped_timer(__PRETTY_FUNCTION__, 2133 "ObjectFileMachO::ParseSymtab () module = %s", 2134 m_file.GetFilename().AsCString("")); 2135 ModuleSP module_sp (GetModule()); 2136 if (!module_sp) 2137 return 0; 2138 2139 struct symtab_command symtab_load_command = { 0, 0, 0, 0, 0, 0 }; 2140 struct linkedit_data_command function_starts_load_command = { 0, 0, 0, 0 }; 2141 struct dyld_info_command dyld_info = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; 2142 typedef AddressDataArray<lldb::addr_t, bool, 100> FunctionStarts; 2143 FunctionStarts function_starts; 2144 lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); 2145 uint32_t i; 2146 FileSpecList dylib_files; 2147 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_SYMBOLS)); 2148 static const llvm::StringRef g_objc_v2_prefix_class ("_OBJC_CLASS_$_"); 2149 static const llvm::StringRef g_objc_v2_prefix_metaclass ("_OBJC_METACLASS_$_"); 2150 static const llvm::StringRef g_objc_v2_prefix_ivar ("_OBJC_IVAR_$_"); 2151 2152 for (i=0; i<m_header.ncmds; ++i) 2153 { 2154 const lldb::offset_t cmd_offset = offset; 2155 // Read in the load command and load command size 2156 struct load_command lc; 2157 if (m_data.GetU32(&offset, &lc, 2) == NULL) 2158 break; 2159 // Watch for the symbol table load command 2160 switch (lc.cmd) 2161 { 2162 case LC_SYMTAB: 2163 symtab_load_command.cmd = lc.cmd; 2164 symtab_load_command.cmdsize = lc.cmdsize; 2165 // Read in the rest of the symtab load command 2166 if (m_data.GetU32(&offset, &symtab_load_command.symoff, 4) == 0) // fill in symoff, nsyms, stroff, strsize fields 2167 return 0; 2168 if (symtab_load_command.symoff == 0) 2169 { 2170 if (log) 2171 module_sp->LogMessage(log, "LC_SYMTAB.symoff == 0"); 2172 return 0; 2173 } 2174 2175 if (symtab_load_command.stroff == 0) 2176 { 2177 if (log) 2178 module_sp->LogMessage(log, "LC_SYMTAB.stroff == 0"); 2179 return 0; 2180 } 2181 2182 if (symtab_load_command.nsyms == 0) 2183 { 2184 if (log) 2185 module_sp->LogMessage(log, "LC_SYMTAB.nsyms == 0"); 2186 return 0; 2187 } 2188 2189 if (symtab_load_command.strsize == 0) 2190 { 2191 if (log) 2192 module_sp->LogMessage(log, "LC_SYMTAB.strsize == 0"); 2193 return 0; 2194 } 2195 break; 2196 2197 case LC_DYLD_INFO: 2198 case LC_DYLD_INFO_ONLY: 2199 if (m_data.GetU32(&offset, &dyld_info.rebase_off, 10)) 2200 { 2201 dyld_info.cmd = lc.cmd; 2202 dyld_info.cmdsize = lc.cmdsize; 2203 } 2204 else 2205 { 2206 memset (&dyld_info, 0, sizeof(dyld_info)); 2207 } 2208 break; 2209 2210 case LC_LOAD_DYLIB: 2211 case LC_LOAD_WEAK_DYLIB: 2212 case LC_REEXPORT_DYLIB: 2213 case LC_LOADFVMLIB: 2214 case LC_LOAD_UPWARD_DYLIB: 2215 { 2216 uint32_t name_offset = cmd_offset + m_data.GetU32(&offset); 2217 const char *path = m_data.PeekCStr(name_offset); 2218 if (path) 2219 { 2220 FileSpec file_spec(path, false); 2221 // Strip the path if there is @rpath, @executable, etc so we just use the basename 2222 if (path[0] == '@') 2223 file_spec.GetDirectory().Clear(); 2224 2225 if (lc.cmd == LC_REEXPORT_DYLIB) 2226 { 2227 m_reexported_dylibs.AppendIfUnique(file_spec); 2228 } 2229 2230 dylib_files.Append(file_spec); 2231 } 2232 } 2233 break; 2234 2235 case LC_FUNCTION_STARTS: 2236 function_starts_load_command.cmd = lc.cmd; 2237 function_starts_load_command.cmdsize = lc.cmdsize; 2238 if (m_data.GetU32(&offset, &function_starts_load_command.dataoff, 2) == NULL) // fill in symoff, nsyms, stroff, strsize fields 2239 memset (&function_starts_load_command, 0, sizeof(function_starts_load_command)); 2240 break; 2241 2242 default: 2243 break; 2244 } 2245 offset = cmd_offset + lc.cmdsize; 2246 } 2247 2248 if (symtab_load_command.cmd) 2249 { 2250 Symtab *symtab = m_symtab_ap.get(); 2251 SectionList *section_list = GetSectionList(); 2252 if (section_list == NULL) 2253 return 0; 2254 2255 const uint32_t addr_byte_size = m_data.GetAddressByteSize(); 2256 const ByteOrder byte_order = m_data.GetByteOrder(); 2257 bool bit_width_32 = addr_byte_size == 4; 2258 const size_t nlist_byte_size = bit_width_32 ? sizeof(struct nlist) : sizeof(struct nlist_64); 2259 2260 DataExtractor nlist_data (NULL, 0, byte_order, addr_byte_size); 2261 DataExtractor strtab_data (NULL, 0, byte_order, addr_byte_size); 2262 DataExtractor function_starts_data (NULL, 0, byte_order, addr_byte_size); 2263 DataExtractor indirect_symbol_index_data (NULL, 0, byte_order, addr_byte_size); 2264 DataExtractor dyld_trie_data (NULL, 0, byte_order, addr_byte_size); 2265 2266 const addr_t nlist_data_byte_size = symtab_load_command.nsyms * nlist_byte_size; 2267 const addr_t strtab_data_byte_size = symtab_load_command.strsize; 2268 addr_t strtab_addr = LLDB_INVALID_ADDRESS; 2269 2270 ProcessSP process_sp (m_process_wp.lock()); 2271 Process *process = process_sp.get(); 2272 2273 uint32_t memory_module_load_level = eMemoryModuleLoadLevelComplete; 2274 2275 if (process && m_header.filetype != llvm::MachO::MH_OBJECT) 2276 { 2277 Target &target = process->GetTarget(); 2278 2279 memory_module_load_level = target.GetMemoryModuleLoadLevel(); 2280 2281 SectionSP linkedit_section_sp(section_list->FindSectionByName(GetSegmentNameLINKEDIT())); 2282 // Reading mach file from memory in a process or core file... 2283 2284 if (linkedit_section_sp) 2285 { 2286 addr_t linkedit_load_addr = linkedit_section_sp->GetLoadBaseAddress(&target); 2287 if (linkedit_load_addr == LLDB_INVALID_ADDRESS) 2288 { 2289 // We might be trying to access the symbol table before the __LINKEDIT's load 2290 // address has been set in the target. We can't fail to read the symbol table, 2291 // so calculate the right address manually 2292 linkedit_load_addr = CalculateSectionLoadAddressForMemoryImage(m_memory_addr, GetMachHeaderSection(), linkedit_section_sp.get()); 2293 } 2294 2295 const addr_t linkedit_file_offset = linkedit_section_sp->GetFileOffset(); 2296 const addr_t symoff_addr = linkedit_load_addr + symtab_load_command.symoff - linkedit_file_offset; 2297 strtab_addr = linkedit_load_addr + symtab_load_command.stroff - linkedit_file_offset; 2298 2299 bool data_was_read = false; 2300 2301 #if defined (__APPLE__) && (defined (__arm__) || defined (__arm64__) || defined (__aarch64__)) 2302 if (m_header.flags & 0x80000000u && process->GetAddressByteSize() == sizeof (void*)) 2303 { 2304 // This mach-o memory file is in the dyld shared cache. If this 2305 // program is not remote and this is iOS, then this process will 2306 // share the same shared cache as the process we are debugging and 2307 // we can read the entire __LINKEDIT from the address space in this 2308 // process. This is a needed optimization that is used for local iOS 2309 // debugging only since all shared libraries in the shared cache do 2310 // not have corresponding files that exist in the file system of the 2311 // device. They have been combined into a single file. This means we 2312 // always have to load these files from memory. All of the symbol and 2313 // string tables from all of the __LINKEDIT sections from the shared 2314 // libraries in the shared cache have been merged into a single large 2315 // symbol and string table. Reading all of this symbol and string table 2316 // data across can slow down debug launch times, so we optimize this by 2317 // reading the memory for the __LINKEDIT section from this process. 2318 2319 UUID lldb_shared_cache(GetLLDBSharedCacheUUID()); 2320 UUID process_shared_cache(GetProcessSharedCacheUUID(process)); 2321 bool use_lldb_cache = true; 2322 if (lldb_shared_cache.IsValid() && process_shared_cache.IsValid() && lldb_shared_cache != process_shared_cache) 2323 { 2324 use_lldb_cache = false; 2325 ModuleSP module_sp (GetModule()); 2326 if (module_sp) 2327 module_sp->ReportWarning ("shared cache in process does not match lldb's own shared cache, startup will be slow."); 2328 2329 } 2330 2331 PlatformSP platform_sp (target.GetPlatform()); 2332 if (platform_sp && platform_sp->IsHost() && use_lldb_cache) 2333 { 2334 data_was_read = true; 2335 nlist_data.SetData((void *)symoff_addr, nlist_data_byte_size, eByteOrderLittle); 2336 strtab_data.SetData((void *)strtab_addr, strtab_data_byte_size, eByteOrderLittle); 2337 if (function_starts_load_command.cmd) 2338 { 2339 const addr_t func_start_addr = linkedit_load_addr + function_starts_load_command.dataoff - linkedit_file_offset; 2340 function_starts_data.SetData ((void *)func_start_addr, function_starts_load_command.datasize, eByteOrderLittle); 2341 } 2342 } 2343 } 2344 #endif 2345 2346 if (!data_was_read) 2347 { 2348 if (memory_module_load_level == eMemoryModuleLoadLevelComplete) 2349 { 2350 DataBufferSP nlist_data_sp (ReadMemory (process_sp, symoff_addr, nlist_data_byte_size)); 2351 if (nlist_data_sp) 2352 nlist_data.SetData (nlist_data_sp, 0, nlist_data_sp->GetByteSize()); 2353 // Load strings individually from memory when loading from memory since shared cache 2354 // string tables contain strings for all symbols from all shared cached libraries 2355 //DataBufferSP strtab_data_sp (ReadMemory (process_sp, strtab_addr, strtab_data_byte_size)); 2356 //if (strtab_data_sp) 2357 // strtab_data.SetData (strtab_data_sp, 0, strtab_data_sp->GetByteSize()); 2358 if (m_dysymtab.nindirectsyms != 0) 2359 { 2360 const addr_t indirect_syms_addr = linkedit_load_addr + m_dysymtab.indirectsymoff - linkedit_file_offset; 2361 DataBufferSP indirect_syms_data_sp (ReadMemory (process_sp, indirect_syms_addr, m_dysymtab.nindirectsyms * 4)); 2362 if (indirect_syms_data_sp) 2363 indirect_symbol_index_data.SetData (indirect_syms_data_sp, 0, indirect_syms_data_sp->GetByteSize()); 2364 } 2365 } 2366 2367 if (memory_module_load_level >= eMemoryModuleLoadLevelPartial) 2368 { 2369 if (function_starts_load_command.cmd) 2370 { 2371 const addr_t func_start_addr = linkedit_load_addr + function_starts_load_command.dataoff - linkedit_file_offset; 2372 DataBufferSP func_start_data_sp (ReadMemory (process_sp, func_start_addr, function_starts_load_command.datasize)); 2373 if (func_start_data_sp) 2374 function_starts_data.SetData (func_start_data_sp, 0, func_start_data_sp->GetByteSize()); 2375 } 2376 } 2377 } 2378 } 2379 } 2380 else 2381 { 2382 nlist_data.SetData (m_data, 2383 symtab_load_command.symoff, 2384 nlist_data_byte_size); 2385 strtab_data.SetData (m_data, 2386 symtab_load_command.stroff, 2387 strtab_data_byte_size); 2388 2389 if (dyld_info.export_size > 0) 2390 { 2391 dyld_trie_data.SetData (m_data, 2392 dyld_info.export_off, 2393 dyld_info.export_size); 2394 } 2395 2396 if (m_dysymtab.nindirectsyms != 0) 2397 { 2398 indirect_symbol_index_data.SetData (m_data, 2399 m_dysymtab.indirectsymoff, 2400 m_dysymtab.nindirectsyms * 4); 2401 } 2402 if (function_starts_load_command.cmd) 2403 { 2404 function_starts_data.SetData (m_data, 2405 function_starts_load_command.dataoff, 2406 function_starts_load_command.datasize); 2407 } 2408 } 2409 2410 if (nlist_data.GetByteSize() == 0 && memory_module_load_level == eMemoryModuleLoadLevelComplete) 2411 { 2412 if (log) 2413 module_sp->LogMessage(log, "failed to read nlist data"); 2414 return 0; 2415 } 2416 2417 2418 const bool have_strtab_data = strtab_data.GetByteSize() > 0; 2419 if (!have_strtab_data) 2420 { 2421 if (process) 2422 { 2423 if (strtab_addr == LLDB_INVALID_ADDRESS) 2424 { 2425 if (log) 2426 module_sp->LogMessage(log, "failed to locate the strtab in memory"); 2427 return 0; 2428 } 2429 } 2430 else 2431 { 2432 if (log) 2433 module_sp->LogMessage(log, "failed to read strtab data"); 2434 return 0; 2435 } 2436 } 2437 2438 const ConstString &g_segment_name_TEXT = GetSegmentNameTEXT(); 2439 const ConstString &g_segment_name_DATA = GetSegmentNameDATA(); 2440 const ConstString &g_segment_name_OBJC = GetSegmentNameOBJC(); 2441 const ConstString &g_section_name_eh_frame = GetSectionNameEHFrame(); 2442 SectionSP text_section_sp(section_list->FindSectionByName(g_segment_name_TEXT)); 2443 SectionSP data_section_sp(section_list->FindSectionByName(g_segment_name_DATA)); 2444 SectionSP objc_section_sp(section_list->FindSectionByName(g_segment_name_OBJC)); 2445 SectionSP eh_frame_section_sp; 2446 if (text_section_sp.get()) 2447 eh_frame_section_sp = text_section_sp->GetChildren().FindSectionByName (g_section_name_eh_frame); 2448 else 2449 eh_frame_section_sp = section_list->FindSectionByName (g_section_name_eh_frame); 2450 2451 const bool is_arm = (m_header.cputype == llvm::MachO::CPU_TYPE_ARM); 2452 2453 // lldb works best if it knows the start address of all functions in a module. 2454 // Linker symbols or debug info are normally the best source of information for start addr / size but 2455 // they may be stripped in a released binary. 2456 // Two additional sources of information exist in Mach-O binaries: 2457 // LC_FUNCTION_STARTS - a list of ULEB128 encoded offsets of each function's start address in the 2458 // binary, relative to the text section. 2459 // eh_frame - the eh_frame FDEs have the start addr & size of each function 2460 // LC_FUNCTION_STARTS is the fastest source to read in, and is present on all modern binaries. 2461 // Binaries built to run on older releases may need to use eh_frame information. 2462 2463 if (text_section_sp && function_starts_data.GetByteSize()) 2464 { 2465 FunctionStarts::Entry function_start_entry; 2466 function_start_entry.data = false; 2467 lldb::offset_t function_start_offset = 0; 2468 function_start_entry.addr = text_section_sp->GetFileAddress(); 2469 uint64_t delta; 2470 while ((delta = function_starts_data.GetULEB128(&function_start_offset)) > 0) 2471 { 2472 // Now append the current entry 2473 function_start_entry.addr += delta; 2474 function_starts.Append(function_start_entry); 2475 } 2476 } 2477 else 2478 { 2479 // If m_type is eTypeDebugInfo, then this is a dSYM - it will have the load command claiming an eh_frame 2480 // but it doesn't actually have the eh_frame content. And if we have a dSYM, we don't need to do any 2481 // of this fill-in-the-missing-symbols works anyway - the debug info should give us all the functions in 2482 // the module. 2483 if (text_section_sp.get() && eh_frame_section_sp.get() && m_type != eTypeDebugInfo) 2484 { 2485 DWARFCallFrameInfo eh_frame(*this, eh_frame_section_sp, eRegisterKindGCC, true); 2486 DWARFCallFrameInfo::FunctionAddressAndSizeVector functions; 2487 eh_frame.GetFunctionAddressAndSizeVector (functions); 2488 addr_t text_base_addr = text_section_sp->GetFileAddress(); 2489 size_t count = functions.GetSize(); 2490 for (size_t i = 0; i < count; ++i) 2491 { 2492 const DWARFCallFrameInfo::FunctionAddressAndSizeVector::Entry *func = functions.GetEntryAtIndex (i); 2493 if (func) 2494 { 2495 FunctionStarts::Entry function_start_entry; 2496 function_start_entry.addr = func->base - text_base_addr; 2497 function_starts.Append(function_start_entry); 2498 } 2499 } 2500 } 2501 } 2502 2503 const size_t function_starts_count = function_starts.GetSize(); 2504 2505 const user_id_t TEXT_eh_frame_sectID = 2506 eh_frame_section_sp.get() ? eh_frame_section_sp->GetID() 2507 : static_cast<user_id_t>(NO_SECT); 2508 2509 lldb::offset_t nlist_data_offset = 0; 2510 2511 uint32_t N_SO_index = UINT32_MAX; 2512 2513 MachSymtabSectionInfo section_info (section_list); 2514 std::vector<uint32_t> N_FUN_indexes; 2515 std::vector<uint32_t> N_NSYM_indexes; 2516 std::vector<uint32_t> N_INCL_indexes; 2517 std::vector<uint32_t> N_BRAC_indexes; 2518 std::vector<uint32_t> N_COMM_indexes; 2519 typedef std::multimap <uint64_t, uint32_t> ValueToSymbolIndexMap; 2520 typedef std::map <uint32_t, uint32_t> NListIndexToSymbolIndexMap; 2521 typedef std::map <const char *, uint32_t> ConstNameToSymbolIndexMap; 2522 ValueToSymbolIndexMap N_FUN_addr_to_sym_idx; 2523 ValueToSymbolIndexMap N_STSYM_addr_to_sym_idx; 2524 ConstNameToSymbolIndexMap N_GSYM_name_to_sym_idx; 2525 // Any symbols that get merged into another will get an entry 2526 // in this map so we know 2527 NListIndexToSymbolIndexMap m_nlist_idx_to_sym_idx; 2528 uint32_t nlist_idx = 0; 2529 Symbol *symbol_ptr = NULL; 2530 2531 uint32_t sym_idx = 0; 2532 Symbol *sym = NULL; 2533 size_t num_syms = 0; 2534 std::string memory_symbol_name; 2535 uint32_t unmapped_local_symbols_found = 0; 2536 2537 std::vector<TrieEntryWithOffset> trie_entries; 2538 std::set<lldb::addr_t> resolver_addresses; 2539 2540 if (dyld_trie_data.GetByteSize() > 0) 2541 { 2542 std::vector<llvm::StringRef> nameSlices; 2543 ParseTrieEntries (dyld_trie_data, 2544 0, 2545 nameSlices, 2546 resolver_addresses, 2547 trie_entries); 2548 2549 ConstString text_segment_name ("__TEXT"); 2550 SectionSP text_segment_sp = GetSectionList()->FindSectionByName(text_segment_name); 2551 if (text_segment_sp) 2552 { 2553 const lldb::addr_t text_segment_file_addr = text_segment_sp->GetFileAddress(); 2554 if (text_segment_file_addr != LLDB_INVALID_ADDRESS) 2555 { 2556 for (auto &e : trie_entries) 2557 e.entry.address += text_segment_file_addr; 2558 } 2559 } 2560 } 2561 2562 typedef std::set<ConstString> IndirectSymbols; 2563 IndirectSymbols indirect_symbol_names; 2564 2565 #if defined (__APPLE__) && (defined (__arm__) || defined (__arm64__) || defined (__aarch64__)) 2566 2567 // Some recent builds of the dyld_shared_cache (hereafter: DSC) have been optimized by moving LOCAL 2568 // symbols out of the memory mapped portion of the DSC. The symbol information has all been retained, 2569 // but it isn't available in the normal nlist data. However, there *are* duplicate entries of *some* 2570 // LOCAL symbols in the normal nlist data. To handle this situation correctly, we must first attempt 2571 // to parse any DSC unmapped symbol information. If we find any, we set a flag that tells the normal 2572 // nlist parser to ignore all LOCAL symbols. 2573 2574 if (m_header.flags & 0x80000000u) 2575 { 2576 // Before we can start mapping the DSC, we need to make certain the target process is actually 2577 // using the cache we can find. 2578 2579 // Next we need to determine the correct path for the dyld shared cache. 2580 2581 ArchSpec header_arch; 2582 GetArchitecture(header_arch); 2583 char dsc_path[PATH_MAX]; 2584 2585 snprintf(dsc_path, sizeof(dsc_path), "%s%s%s", 2586 "/System/Library/Caches/com.apple.dyld/", /* IPHONE_DYLD_SHARED_CACHE_DIR */ 2587 "dyld_shared_cache_", /* DYLD_SHARED_CACHE_BASE_NAME */ 2588 header_arch.GetArchitectureName()); 2589 2590 FileSpec dsc_filespec(dsc_path, false); 2591 2592 // We need definitions of two structures in the on-disk DSC, copy them here manually 2593 struct lldb_copy_dyld_cache_header_v0 2594 { 2595 char magic[16]; // e.g. "dyld_v0 i386", "dyld_v1 armv7", etc. 2596 uint32_t mappingOffset; // file offset to first dyld_cache_mapping_info 2597 uint32_t mappingCount; // number of dyld_cache_mapping_info entries 2598 uint32_t imagesOffset; 2599 uint32_t imagesCount; 2600 uint64_t dyldBaseAddress; 2601 uint64_t codeSignatureOffset; 2602 uint64_t codeSignatureSize; 2603 uint64_t slideInfoOffset; 2604 uint64_t slideInfoSize; 2605 uint64_t localSymbolsOffset; // file offset of where local symbols are stored 2606 uint64_t localSymbolsSize; // size of local symbols information 2607 }; 2608 struct lldb_copy_dyld_cache_header_v1 2609 { 2610 char magic[16]; // e.g. "dyld_v0 i386", "dyld_v1 armv7", etc. 2611 uint32_t mappingOffset; // file offset to first dyld_cache_mapping_info 2612 uint32_t mappingCount; // number of dyld_cache_mapping_info entries 2613 uint32_t imagesOffset; 2614 uint32_t imagesCount; 2615 uint64_t dyldBaseAddress; 2616 uint64_t codeSignatureOffset; 2617 uint64_t codeSignatureSize; 2618 uint64_t slideInfoOffset; 2619 uint64_t slideInfoSize; 2620 uint64_t localSymbolsOffset; 2621 uint64_t localSymbolsSize; 2622 uint8_t uuid[16]; // v1 and above, also recorded in dyld_all_image_infos v13 and later 2623 }; 2624 2625 struct lldb_copy_dyld_cache_mapping_info 2626 { 2627 uint64_t address; 2628 uint64_t size; 2629 uint64_t fileOffset; 2630 uint32_t maxProt; 2631 uint32_t initProt; 2632 }; 2633 2634 struct lldb_copy_dyld_cache_local_symbols_info 2635 { 2636 uint32_t nlistOffset; 2637 uint32_t nlistCount; 2638 uint32_t stringsOffset; 2639 uint32_t stringsSize; 2640 uint32_t entriesOffset; 2641 uint32_t entriesCount; 2642 }; 2643 struct lldb_copy_dyld_cache_local_symbols_entry 2644 { 2645 uint32_t dylibOffset; 2646 uint32_t nlistStartIndex; 2647 uint32_t nlistCount; 2648 }; 2649 2650 /* The dyld_cache_header has a pointer to the dyld_cache_local_symbols_info structure (localSymbolsOffset). 2651 The dyld_cache_local_symbols_info structure gives us three things: 2652 1. The start and count of the nlist records in the dyld_shared_cache file 2653 2. The start and size of the strings for these nlist records 2654 3. The start and count of dyld_cache_local_symbols_entry entries 2655 2656 There is one dyld_cache_local_symbols_entry per dylib/framework in the dyld shared cache. 2657 The "dylibOffset" field is the Mach-O header of this dylib/framework in the dyld shared cache. 2658 The dyld_cache_local_symbols_entry also lists the start of this dylib/framework's nlist records 2659 and the count of how many nlist records there are for this dylib/framework. 2660 */ 2661 2662 // Process the dsc header to find the unmapped symbols 2663 // 2664 // Save some VM space, do not map the entire cache in one shot. 2665 2666 DataBufferSP dsc_data_sp; 2667 dsc_data_sp = dsc_filespec.MemoryMapFileContentsIfLocal(0, sizeof(struct lldb_copy_dyld_cache_header_v1)); 2668 2669 if (dsc_data_sp) 2670 { 2671 DataExtractor dsc_header_data(dsc_data_sp, byte_order, addr_byte_size); 2672 2673 char version_str[17]; 2674 int version = -1; 2675 lldb::offset_t offset = 0; 2676 memcpy (version_str, dsc_header_data.GetData (&offset, 16), 16); 2677 version_str[16] = '\0'; 2678 if (strncmp (version_str, "dyld_v", 6) == 0 && isdigit (version_str[6])) 2679 { 2680 int v; 2681 if (::sscanf (version_str + 6, "%d", &v) == 1) 2682 { 2683 version = v; 2684 } 2685 } 2686 2687 UUID dsc_uuid; 2688 if (version >= 1) 2689 { 2690 offset = offsetof (struct lldb_copy_dyld_cache_header_v1, uuid); 2691 uint8_t uuid_bytes[sizeof (uuid_t)]; 2692 memcpy (uuid_bytes, dsc_header_data.GetData (&offset, sizeof (uuid_t)), sizeof (uuid_t)); 2693 dsc_uuid.SetBytes (uuid_bytes); 2694 } 2695 2696 bool uuid_match = true; 2697 if (dsc_uuid.IsValid() && process) 2698 { 2699 UUID shared_cache_uuid(GetProcessSharedCacheUUID(process)); 2700 2701 if (shared_cache_uuid.IsValid() && dsc_uuid != shared_cache_uuid) 2702 { 2703 // The on-disk dyld_shared_cache file is not the same as the one in this 2704 // process' memory, don't use it. 2705 uuid_match = false; 2706 ModuleSP module_sp (GetModule()); 2707 if (module_sp) 2708 module_sp->ReportWarning ("process shared cache does not match on-disk dyld_shared_cache file, some symbol names will be missing."); 2709 } 2710 } 2711 2712 offset = offsetof (struct lldb_copy_dyld_cache_header_v1, mappingOffset); 2713 2714 uint32_t mappingOffset = dsc_header_data.GetU32(&offset); 2715 2716 // If the mappingOffset points to a location inside the header, we've 2717 // opened an old dyld shared cache, and should not proceed further. 2718 if (uuid_match && mappingOffset >= sizeof(struct lldb_copy_dyld_cache_header_v0)) 2719 { 2720 2721 DataBufferSP dsc_mapping_info_data_sp = dsc_filespec.MemoryMapFileContentsIfLocal(mappingOffset, sizeof (struct lldb_copy_dyld_cache_mapping_info)); 2722 DataExtractor dsc_mapping_info_data(dsc_mapping_info_data_sp, byte_order, addr_byte_size); 2723 offset = 0; 2724 2725 // The File addresses (from the in-memory Mach-O load commands) for the shared libraries 2726 // in the shared library cache need to be adjusted by an offset to match up with the 2727 // dylibOffset identifying field in the dyld_cache_local_symbol_entry's. This offset is 2728 // recorded in mapping_offset_value. 2729 const uint64_t mapping_offset_value = dsc_mapping_info_data.GetU64(&offset); 2730 2731 offset = offsetof (struct lldb_copy_dyld_cache_header_v1, localSymbolsOffset); 2732 uint64_t localSymbolsOffset = dsc_header_data.GetU64(&offset); 2733 uint64_t localSymbolsSize = dsc_header_data.GetU64(&offset); 2734 2735 if (localSymbolsOffset && localSymbolsSize) 2736 { 2737 // Map the local symbols 2738 if (DataBufferSP dsc_local_symbols_data_sp = dsc_filespec.MemoryMapFileContentsIfLocal(localSymbolsOffset, localSymbolsSize)) 2739 { 2740 DataExtractor dsc_local_symbols_data(dsc_local_symbols_data_sp, byte_order, addr_byte_size); 2741 2742 offset = 0; 2743 2744 typedef std::map<ConstString, uint16_t> UndefinedNameToDescMap; 2745 typedef std::map<uint32_t, ConstString> SymbolIndexToName; 2746 UndefinedNameToDescMap undefined_name_to_desc; 2747 SymbolIndexToName reexport_shlib_needs_fixup; 2748 2749 2750 // Read the local_symbols_infos struct in one shot 2751 struct lldb_copy_dyld_cache_local_symbols_info local_symbols_info; 2752 dsc_local_symbols_data.GetU32(&offset, &local_symbols_info.nlistOffset, 6); 2753 2754 SectionSP text_section_sp(section_list->FindSectionByName(GetSegmentNameTEXT())); 2755 2756 uint32_t header_file_offset = (text_section_sp->GetFileAddress() - mapping_offset_value); 2757 2758 offset = local_symbols_info.entriesOffset; 2759 for (uint32_t entry_index = 0; entry_index < local_symbols_info.entriesCount; entry_index++) 2760 { 2761 struct lldb_copy_dyld_cache_local_symbols_entry local_symbols_entry; 2762 local_symbols_entry.dylibOffset = dsc_local_symbols_data.GetU32(&offset); 2763 local_symbols_entry.nlistStartIndex = dsc_local_symbols_data.GetU32(&offset); 2764 local_symbols_entry.nlistCount = dsc_local_symbols_data.GetU32(&offset); 2765 2766 if (header_file_offset == local_symbols_entry.dylibOffset) 2767 { 2768 unmapped_local_symbols_found = local_symbols_entry.nlistCount; 2769 2770 // The normal nlist code cannot correctly size the Symbols array, we need to allocate it here. 2771 sym = symtab->Resize (symtab_load_command.nsyms + m_dysymtab.nindirectsyms + unmapped_local_symbols_found - m_dysymtab.nlocalsym); 2772 num_syms = symtab->GetNumSymbols(); 2773 2774 nlist_data_offset = local_symbols_info.nlistOffset + (nlist_byte_size * local_symbols_entry.nlistStartIndex); 2775 uint32_t string_table_offset = local_symbols_info.stringsOffset; 2776 2777 for (uint32_t nlist_index = 0; nlist_index < local_symbols_entry.nlistCount; nlist_index++) 2778 { 2779 ///////////////////////////// 2780 { 2781 struct nlist_64 nlist; 2782 if (!dsc_local_symbols_data.ValidOffsetForDataOfSize(nlist_data_offset, nlist_byte_size)) 2783 break; 2784 2785 nlist.n_strx = dsc_local_symbols_data.GetU32_unchecked(&nlist_data_offset); 2786 nlist.n_type = dsc_local_symbols_data.GetU8_unchecked (&nlist_data_offset); 2787 nlist.n_sect = dsc_local_symbols_data.GetU8_unchecked (&nlist_data_offset); 2788 nlist.n_desc = dsc_local_symbols_data.GetU16_unchecked (&nlist_data_offset); 2789 nlist.n_value = dsc_local_symbols_data.GetAddress_unchecked (&nlist_data_offset); 2790 2791 SymbolType type = eSymbolTypeInvalid; 2792 const char *symbol_name = dsc_local_symbols_data.PeekCStr(string_table_offset + nlist.n_strx); 2793 2794 if (symbol_name == NULL) 2795 { 2796 // No symbol should be NULL, even the symbols with no 2797 // string values should have an offset zero which points 2798 // to an empty C-string 2799 Host::SystemLog (Host::eSystemLogError, 2800 "error: DSC unmapped local symbol[%u] has invalid string table offset 0x%x in %s, ignoring symbol\n", 2801 entry_index, 2802 nlist.n_strx, 2803 module_sp->GetFileSpec().GetPath().c_str()); 2804 continue; 2805 } 2806 if (symbol_name[0] == '\0') 2807 symbol_name = NULL; 2808 2809 const char *symbol_name_non_abi_mangled = NULL; 2810 2811 SectionSP symbol_section; 2812 uint32_t symbol_byte_size = 0; 2813 bool add_nlist = true; 2814 bool is_debug = ((nlist.n_type & N_STAB) != 0); 2815 bool demangled_is_synthesized = false; 2816 bool is_gsym = false; 2817 bool set_value = true; 2818 2819 assert (sym_idx < num_syms); 2820 2821 sym[sym_idx].SetDebug (is_debug); 2822 2823 if (is_debug) 2824 { 2825 switch (nlist.n_type) 2826 { 2827 case N_GSYM: 2828 // global symbol: name,,NO_SECT,type,0 2829 // Sometimes the N_GSYM value contains the address. 2830 2831 // FIXME: In the .o files, we have a GSYM and a debug symbol for all the ObjC data. They 2832 // have the same address, but we want to ensure that we always find only the real symbol, 2833 // 'cause we don't currently correctly attribute the GSYM one to the ObjCClass/Ivar/MetaClass 2834 // symbol type. This is a temporary hack to make sure the ObjectiveC symbols get treated 2835 // correctly. To do this right, we should coalesce all the GSYM & global symbols that have the 2836 // same address. 2837 2838 is_gsym = true; 2839 sym[sym_idx].SetExternal(true); 2840 2841 if (symbol_name && symbol_name[0] == '_' && symbol_name[1] == 'O') 2842 { 2843 llvm::StringRef symbol_name_ref(symbol_name); 2844 if (symbol_name_ref.startswith(g_objc_v2_prefix_class)) 2845 { 2846 symbol_name_non_abi_mangled = symbol_name + 1; 2847 symbol_name = symbol_name + g_objc_v2_prefix_class.size(); 2848 type = eSymbolTypeObjCClass; 2849 demangled_is_synthesized = true; 2850 2851 } 2852 else if (symbol_name_ref.startswith(g_objc_v2_prefix_metaclass)) 2853 { 2854 symbol_name_non_abi_mangled = symbol_name + 1; 2855 symbol_name = symbol_name + g_objc_v2_prefix_metaclass.size(); 2856 type = eSymbolTypeObjCMetaClass; 2857 demangled_is_synthesized = true; 2858 } 2859 else if (symbol_name_ref.startswith(g_objc_v2_prefix_ivar)) 2860 { 2861 symbol_name_non_abi_mangled = symbol_name + 1; 2862 symbol_name = symbol_name + g_objc_v2_prefix_ivar.size(); 2863 type = eSymbolTypeObjCIVar; 2864 demangled_is_synthesized = true; 2865 } 2866 } 2867 else 2868 { 2869 if (nlist.n_value != 0) 2870 symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value); 2871 type = eSymbolTypeData; 2872 } 2873 break; 2874 2875 case N_FNAME: 2876 // procedure name (f77 kludge): name,,NO_SECT,0,0 2877 type = eSymbolTypeCompiler; 2878 break; 2879 2880 case N_FUN: 2881 // procedure: name,,n_sect,linenumber,address 2882 if (symbol_name) 2883 { 2884 type = eSymbolTypeCode; 2885 symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value); 2886 2887 N_FUN_addr_to_sym_idx.insert(std::make_pair(nlist.n_value, sym_idx)); 2888 // We use the current number of symbols in the symbol table in lieu of 2889 // using nlist_idx in case we ever start trimming entries out 2890 N_FUN_indexes.push_back(sym_idx); 2891 } 2892 else 2893 { 2894 type = eSymbolTypeCompiler; 2895 2896 if ( !N_FUN_indexes.empty() ) 2897 { 2898 // Copy the size of the function into the original STAB entry so we don't have 2899 // to hunt for it later 2900 symtab->SymbolAtIndex(N_FUN_indexes.back())->SetByteSize(nlist.n_value); 2901 N_FUN_indexes.pop_back(); 2902 // We don't really need the end function STAB as it contains the size which 2903 // we already placed with the original symbol, so don't add it if we want a 2904 // minimal symbol table 2905 add_nlist = false; 2906 } 2907 } 2908 break; 2909 2910 case N_STSYM: 2911 // static symbol: name,,n_sect,type,address 2912 N_STSYM_addr_to_sym_idx.insert(std::make_pair(nlist.n_value, sym_idx)); 2913 symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value); 2914 type = eSymbolTypeData; 2915 break; 2916 2917 case N_LCSYM: 2918 // .lcomm symbol: name,,n_sect,type,address 2919 symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value); 2920 type = eSymbolTypeCommonBlock; 2921 break; 2922 2923 case N_BNSYM: 2924 // We use the current number of symbols in the symbol table in lieu of 2925 // using nlist_idx in case we ever start trimming entries out 2926 // Skip these if we want minimal symbol tables 2927 add_nlist = false; 2928 break; 2929 2930 case N_ENSYM: 2931 // Set the size of the N_BNSYM to the terminating index of this N_ENSYM 2932 // so that we can always skip the entire symbol if we need to navigate 2933 // more quickly at the source level when parsing STABS 2934 // Skip these if we want minimal symbol tables 2935 add_nlist = false; 2936 break; 2937 2938 2939 case N_OPT: 2940 // emitted with gcc2_compiled and in gcc source 2941 type = eSymbolTypeCompiler; 2942 break; 2943 2944 case N_RSYM: 2945 // register sym: name,,NO_SECT,type,register 2946 type = eSymbolTypeVariable; 2947 break; 2948 2949 case N_SLINE: 2950 // src line: 0,,n_sect,linenumber,address 2951 symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value); 2952 type = eSymbolTypeLineEntry; 2953 break; 2954 2955 case N_SSYM: 2956 // structure elt: name,,NO_SECT,type,struct_offset 2957 type = eSymbolTypeVariableType; 2958 break; 2959 2960 case N_SO: 2961 // source file name 2962 type = eSymbolTypeSourceFile; 2963 if (symbol_name == NULL) 2964 { 2965 add_nlist = false; 2966 if (N_SO_index != UINT32_MAX) 2967 { 2968 // Set the size of the N_SO to the terminating index of this N_SO 2969 // so that we can always skip the entire N_SO if we need to navigate 2970 // more quickly at the source level when parsing STABS 2971 symbol_ptr = symtab->SymbolAtIndex(N_SO_index); 2972 symbol_ptr->SetByteSize(sym_idx); 2973 symbol_ptr->SetSizeIsSibling(true); 2974 } 2975 N_NSYM_indexes.clear(); 2976 N_INCL_indexes.clear(); 2977 N_BRAC_indexes.clear(); 2978 N_COMM_indexes.clear(); 2979 N_FUN_indexes.clear(); 2980 N_SO_index = UINT32_MAX; 2981 } 2982 else 2983 { 2984 // We use the current number of symbols in the symbol table in lieu of 2985 // using nlist_idx in case we ever start trimming entries out 2986 const bool N_SO_has_full_path = symbol_name[0] == '/'; 2987 if (N_SO_has_full_path) 2988 { 2989 if ((N_SO_index == sym_idx - 1) && ((sym_idx - 1) < num_syms)) 2990 { 2991 // We have two consecutive N_SO entries where the first contains a directory 2992 // and the second contains a full path. 2993 sym[sym_idx - 1].GetMangled().SetValue(ConstString(symbol_name), false); 2994 m_nlist_idx_to_sym_idx[nlist_idx] = sym_idx - 1; 2995 add_nlist = false; 2996 } 2997 else 2998 { 2999 // This is the first entry in a N_SO that contains a directory or 3000 // a full path to the source file 3001 N_SO_index = sym_idx; 3002 } 3003 } 3004 else if ((N_SO_index == sym_idx - 1) && ((sym_idx - 1) < num_syms)) 3005 { 3006 // This is usually the second N_SO entry that contains just the filename, 3007 // so here we combine it with the first one if we are minimizing the symbol table 3008 const char *so_path = sym[sym_idx - 1].GetMangled().GetDemangledName().AsCString(); 3009 if (so_path && so_path[0]) 3010 { 3011 std::string full_so_path (so_path); 3012 const size_t double_slash_pos = full_so_path.find("//"); 3013 if (double_slash_pos != std::string::npos) 3014 { 3015 // The linker has been generating bad N_SO entries with doubled up paths 3016 // in the format "%s%s" where the first string in the DW_AT_comp_dir, 3017 // and the second is the directory for the source file so you end up with 3018 // a path that looks like "/tmp/src//tmp/src/" 3019 FileSpec so_dir(so_path, false); 3020 if (!so_dir.Exists()) 3021 { 3022 so_dir.SetFile(&full_so_path[double_slash_pos + 1], false); 3023 if (so_dir.Exists()) 3024 { 3025 // Trim off the incorrect path 3026 full_so_path.erase(0, double_slash_pos + 1); 3027 } 3028 } 3029 } 3030 if (*full_so_path.rbegin() != '/') 3031 full_so_path += '/'; 3032 full_so_path += symbol_name; 3033 sym[sym_idx - 1].GetMangled().SetValue(ConstString(full_so_path.c_str()), false); 3034 add_nlist = false; 3035 m_nlist_idx_to_sym_idx[nlist_idx] = sym_idx - 1; 3036 } 3037 } 3038 else 3039 { 3040 // This could be a relative path to a N_SO 3041 N_SO_index = sym_idx; 3042 } 3043 } 3044 break; 3045 3046 case N_OSO: 3047 // object file name: name,,0,0,st_mtime 3048 type = eSymbolTypeObjectFile; 3049 break; 3050 3051 case N_LSYM: 3052 // local sym: name,,NO_SECT,type,offset 3053 type = eSymbolTypeLocal; 3054 break; 3055 3056 //---------------------------------------------------------------------- 3057 // INCL scopes 3058 //---------------------------------------------------------------------- 3059 case N_BINCL: 3060 // include file beginning: name,,NO_SECT,0,sum 3061 // We use the current number of symbols in the symbol table in lieu of 3062 // using nlist_idx in case we ever start trimming entries out 3063 N_INCL_indexes.push_back(sym_idx); 3064 type = eSymbolTypeScopeBegin; 3065 break; 3066 3067 case N_EINCL: 3068 // include file end: name,,NO_SECT,0,0 3069 // Set the size of the N_BINCL to the terminating index of this N_EINCL 3070 // so that we can always skip the entire symbol if we need to navigate 3071 // more quickly at the source level when parsing STABS 3072 if ( !N_INCL_indexes.empty() ) 3073 { 3074 symbol_ptr = symtab->SymbolAtIndex(N_INCL_indexes.back()); 3075 symbol_ptr->SetByteSize(sym_idx + 1); 3076 symbol_ptr->SetSizeIsSibling(true); 3077 N_INCL_indexes.pop_back(); 3078 } 3079 type = eSymbolTypeScopeEnd; 3080 break; 3081 3082 case N_SOL: 3083 // #included file name: name,,n_sect,0,address 3084 type = eSymbolTypeHeaderFile; 3085 3086 // We currently don't use the header files on darwin 3087 add_nlist = false; 3088 break; 3089 3090 case N_PARAMS: 3091 // compiler parameters: name,,NO_SECT,0,0 3092 type = eSymbolTypeCompiler; 3093 break; 3094 3095 case N_VERSION: 3096 // compiler version: name,,NO_SECT,0,0 3097 type = eSymbolTypeCompiler; 3098 break; 3099 3100 case N_OLEVEL: 3101 // compiler -O level: name,,NO_SECT,0,0 3102 type = eSymbolTypeCompiler; 3103 break; 3104 3105 case N_PSYM: 3106 // parameter: name,,NO_SECT,type,offset 3107 type = eSymbolTypeVariable; 3108 break; 3109 3110 case N_ENTRY: 3111 // alternate entry: name,,n_sect,linenumber,address 3112 symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value); 3113 type = eSymbolTypeLineEntry; 3114 break; 3115 3116 //---------------------------------------------------------------------- 3117 // Left and Right Braces 3118 //---------------------------------------------------------------------- 3119 case N_LBRAC: 3120 // left bracket: 0,,NO_SECT,nesting level,address 3121 // We use the current number of symbols in the symbol table in lieu of 3122 // using nlist_idx in case we ever start trimming entries out 3123 symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value); 3124 N_BRAC_indexes.push_back(sym_idx); 3125 type = eSymbolTypeScopeBegin; 3126 break; 3127 3128 case N_RBRAC: 3129 // right bracket: 0,,NO_SECT,nesting level,address 3130 // Set the size of the N_LBRAC to the terminating index of this N_RBRAC 3131 // so that we can always skip the entire symbol if we need to navigate 3132 // more quickly at the source level when parsing STABS 3133 symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value); 3134 if ( !N_BRAC_indexes.empty() ) 3135 { 3136 symbol_ptr = symtab->SymbolAtIndex(N_BRAC_indexes.back()); 3137 symbol_ptr->SetByteSize(sym_idx + 1); 3138 symbol_ptr->SetSizeIsSibling(true); 3139 N_BRAC_indexes.pop_back(); 3140 } 3141 type = eSymbolTypeScopeEnd; 3142 break; 3143 3144 case N_EXCL: 3145 // deleted include file: name,,NO_SECT,0,sum 3146 type = eSymbolTypeHeaderFile; 3147 break; 3148 3149 //---------------------------------------------------------------------- 3150 // COMM scopes 3151 //---------------------------------------------------------------------- 3152 case N_BCOMM: 3153 // begin common: name,,NO_SECT,0,0 3154 // We use the current number of symbols in the symbol table in lieu of 3155 // using nlist_idx in case we ever start trimming entries out 3156 type = eSymbolTypeScopeBegin; 3157 N_COMM_indexes.push_back(sym_idx); 3158 break; 3159 3160 case N_ECOML: 3161 // end common (local name): 0,,n_sect,0,address 3162 symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value); 3163 // Fall through 3164 3165 case N_ECOMM: 3166 // end common: name,,n_sect,0,0 3167 // Set the size of the N_BCOMM to the terminating index of this N_ECOMM/N_ECOML 3168 // so that we can always skip the entire symbol if we need to navigate 3169 // more quickly at the source level when parsing STABS 3170 if ( !N_COMM_indexes.empty() ) 3171 { 3172 symbol_ptr = symtab->SymbolAtIndex(N_COMM_indexes.back()); 3173 symbol_ptr->SetByteSize(sym_idx + 1); 3174 symbol_ptr->SetSizeIsSibling(true); 3175 N_COMM_indexes.pop_back(); 3176 } 3177 type = eSymbolTypeScopeEnd; 3178 break; 3179 3180 case N_LENG: 3181 // second stab entry with length information 3182 type = eSymbolTypeAdditional; 3183 break; 3184 3185 default: break; 3186 } 3187 } 3188 else 3189 { 3190 //uint8_t n_pext = N_PEXT & nlist.n_type; 3191 uint8_t n_type = N_TYPE & nlist.n_type; 3192 sym[sym_idx].SetExternal((N_EXT & nlist.n_type) != 0); 3193 3194 switch (n_type) 3195 { 3196 case N_INDR: 3197 { 3198 const char *reexport_name_cstr = strtab_data.PeekCStr(nlist.n_value); 3199 if (reexport_name_cstr && reexport_name_cstr[0]) 3200 { 3201 type = eSymbolTypeReExported; 3202 ConstString reexport_name(reexport_name_cstr + ((reexport_name_cstr[0] == '_') ? 1 : 0)); 3203 sym[sym_idx].SetReExportedSymbolName(reexport_name); 3204 set_value = false; 3205 reexport_shlib_needs_fixup[sym_idx] = reexport_name; 3206 indirect_symbol_names.insert(ConstString(symbol_name + ((symbol_name[0] == '_') ? 1 : 0))); 3207 } 3208 else 3209 type = eSymbolTypeUndefined; 3210 } 3211 break; 3212 3213 case N_UNDF: 3214 if (symbol_name && symbol_name[0]) 3215 { 3216 ConstString undefined_name(symbol_name + ((symbol_name[0] == '_') ? 1 : 0)); 3217 undefined_name_to_desc[undefined_name] = nlist.n_desc; 3218 } 3219 // Fall through 3220 case N_PBUD: 3221 type = eSymbolTypeUndefined; 3222 break; 3223 3224 case N_ABS: 3225 type = eSymbolTypeAbsolute; 3226 break; 3227 3228 case N_SECT: 3229 { 3230 symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value); 3231 3232 if (symbol_section == NULL) 3233 { 3234 // TODO: warn about this? 3235 add_nlist = false; 3236 break; 3237 } 3238 3239 if (TEXT_eh_frame_sectID == nlist.n_sect) 3240 { 3241 type = eSymbolTypeException; 3242 } 3243 else 3244 { 3245 uint32_t section_type = symbol_section->Get() & SECTION_TYPE; 3246 3247 switch (section_type) 3248 { 3249 case S_CSTRING_LITERALS: type = eSymbolTypeData; break; // section with only literal C strings 3250 case S_4BYTE_LITERALS: type = eSymbolTypeData; break; // section with only 4 byte literals 3251 case S_8BYTE_LITERALS: type = eSymbolTypeData; break; // section with only 8 byte literals 3252 case S_LITERAL_POINTERS: type = eSymbolTypeTrampoline; break; // section with only pointers to literals 3253 case S_NON_LAZY_SYMBOL_POINTERS: type = eSymbolTypeTrampoline; break; // section with only non-lazy symbol pointers 3254 case S_LAZY_SYMBOL_POINTERS: type = eSymbolTypeTrampoline; break; // section with only lazy symbol pointers 3255 case S_SYMBOL_STUBS: type = eSymbolTypeTrampoline; break; // section with only symbol stubs, byte size of stub in the reserved2 field 3256 case S_MOD_INIT_FUNC_POINTERS: type = eSymbolTypeCode; break; // section with only function pointers for initialization 3257 case S_MOD_TERM_FUNC_POINTERS: type = eSymbolTypeCode; break; // section with only function pointers for termination 3258 case S_INTERPOSING: type = eSymbolTypeTrampoline; break; // section with only pairs of function pointers for interposing 3259 case S_16BYTE_LITERALS: type = eSymbolTypeData; break; // section with only 16 byte literals 3260 case S_DTRACE_DOF: type = eSymbolTypeInstrumentation; break; 3261 case S_LAZY_DYLIB_SYMBOL_POINTERS: type = eSymbolTypeTrampoline; break; 3262 default: 3263 switch (symbol_section->GetType()) 3264 { 3265 case lldb::eSectionTypeCode: 3266 type = eSymbolTypeCode; 3267 break; 3268 case eSectionTypeData: 3269 case eSectionTypeDataCString: // Inlined C string data 3270 case eSectionTypeDataCStringPointers: // Pointers to C string data 3271 case eSectionTypeDataSymbolAddress: // Address of a symbol in the symbol table 3272 case eSectionTypeData4: 3273 case eSectionTypeData8: 3274 case eSectionTypeData16: 3275 type = eSymbolTypeData; 3276 break; 3277 default: 3278 break; 3279 } 3280 break; 3281 } 3282 3283 if (type == eSymbolTypeInvalid) 3284 { 3285 const char *symbol_sect_name = symbol_section->GetName().AsCString(); 3286 if (symbol_section->IsDescendant (text_section_sp.get())) 3287 { 3288 if (symbol_section->IsClear(S_ATTR_PURE_INSTRUCTIONS | 3289 S_ATTR_SELF_MODIFYING_CODE | 3290 S_ATTR_SOME_INSTRUCTIONS)) 3291 type = eSymbolTypeData; 3292 else 3293 type = eSymbolTypeCode; 3294 } 3295 else if (symbol_section->IsDescendant(data_section_sp.get())) 3296 { 3297 if (symbol_sect_name && ::strstr (symbol_sect_name, "__objc") == symbol_sect_name) 3298 { 3299 type = eSymbolTypeRuntime; 3300 3301 if (symbol_name && 3302 symbol_name[0] == '_' && 3303 symbol_name[1] == 'O' && 3304 symbol_name[2] == 'B') 3305 { 3306 llvm::StringRef symbol_name_ref(symbol_name); 3307 if (symbol_name_ref.startswith(g_objc_v2_prefix_class)) 3308 { 3309 symbol_name_non_abi_mangled = symbol_name + 1; 3310 symbol_name = symbol_name + g_objc_v2_prefix_class.size(); 3311 type = eSymbolTypeObjCClass; 3312 demangled_is_synthesized = true; 3313 } 3314 else if (symbol_name_ref.startswith(g_objc_v2_prefix_metaclass)) 3315 { 3316 symbol_name_non_abi_mangled = symbol_name + 1; 3317 symbol_name = symbol_name + g_objc_v2_prefix_metaclass.size(); 3318 type = eSymbolTypeObjCMetaClass; 3319 demangled_is_synthesized = true; 3320 } 3321 else if (symbol_name_ref.startswith(g_objc_v2_prefix_ivar)) 3322 { 3323 symbol_name_non_abi_mangled = symbol_name + 1; 3324 symbol_name = symbol_name + g_objc_v2_prefix_ivar.size(); 3325 type = eSymbolTypeObjCIVar; 3326 demangled_is_synthesized = true; 3327 } 3328 } 3329 } 3330 else if (symbol_sect_name && ::strstr (symbol_sect_name, "__gcc_except_tab") == symbol_sect_name) 3331 { 3332 type = eSymbolTypeException; 3333 } 3334 else 3335 { 3336 type = eSymbolTypeData; 3337 } 3338 } 3339 else if (symbol_sect_name && ::strstr (symbol_sect_name, "__IMPORT") == symbol_sect_name) 3340 { 3341 type = eSymbolTypeTrampoline; 3342 } 3343 else if (symbol_section->IsDescendant(objc_section_sp.get())) 3344 { 3345 type = eSymbolTypeRuntime; 3346 if (symbol_name && symbol_name[0] == '.') 3347 { 3348 llvm::StringRef symbol_name_ref(symbol_name); 3349 static const llvm::StringRef g_objc_v1_prefix_class (".objc_class_name_"); 3350 if (symbol_name_ref.startswith(g_objc_v1_prefix_class)) 3351 { 3352 symbol_name_non_abi_mangled = symbol_name; 3353 symbol_name = symbol_name + g_objc_v1_prefix_class.size(); 3354 type = eSymbolTypeObjCClass; 3355 demangled_is_synthesized = true; 3356 } 3357 } 3358 } 3359 } 3360 } 3361 } 3362 break; 3363 } 3364 } 3365 3366 if (add_nlist) 3367 { 3368 uint64_t symbol_value = nlist.n_value; 3369 if (symbol_name_non_abi_mangled) 3370 { 3371 sym[sym_idx].GetMangled().SetMangledName (ConstString(symbol_name_non_abi_mangled)); 3372 sym[sym_idx].GetMangled().SetDemangledName (ConstString(symbol_name)); 3373 } 3374 else 3375 { 3376 bool symbol_name_is_mangled = false; 3377 3378 if (symbol_name && symbol_name[0] == '_') 3379 { 3380 symbol_name_is_mangled = symbol_name[1] == '_'; 3381 symbol_name++; // Skip the leading underscore 3382 } 3383 3384 if (symbol_name) 3385 { 3386 ConstString const_symbol_name(symbol_name); 3387 sym[sym_idx].GetMangled().SetValue(const_symbol_name, symbol_name_is_mangled); 3388 if (is_gsym && is_debug) 3389 N_GSYM_name_to_sym_idx[sym[sym_idx].GetMangled().GetName(Mangled::ePreferMangled).GetCString()] = sym_idx; 3390 } 3391 } 3392 if (symbol_section) 3393 { 3394 const addr_t section_file_addr = symbol_section->GetFileAddress(); 3395 if (symbol_byte_size == 0 && function_starts_count > 0) 3396 { 3397 addr_t symbol_lookup_file_addr = nlist.n_value; 3398 // Do an exact address match for non-ARM addresses, else get the closest since 3399 // the symbol might be a thumb symbol which has an address with bit zero set 3400 FunctionStarts::Entry *func_start_entry = function_starts.FindEntry (symbol_lookup_file_addr, !is_arm); 3401 if (is_arm && func_start_entry) 3402 { 3403 // Verify that the function start address is the symbol address (ARM) 3404 // or the symbol address + 1 (thumb) 3405 if (func_start_entry->addr != symbol_lookup_file_addr && 3406 func_start_entry->addr != (symbol_lookup_file_addr + 1)) 3407 { 3408 // Not the right entry, NULL it out... 3409 func_start_entry = NULL; 3410 } 3411 } 3412 if (func_start_entry) 3413 { 3414 func_start_entry->data = true; 3415 3416 addr_t symbol_file_addr = func_start_entry->addr; 3417 uint32_t symbol_flags = 0; 3418 if (is_arm) 3419 { 3420 if (symbol_file_addr & 1) 3421 symbol_flags = MACHO_NLIST_ARM_SYMBOL_IS_THUMB; 3422 symbol_file_addr &= 0xfffffffffffffffeull; 3423 } 3424 3425 const FunctionStarts::Entry *next_func_start_entry = function_starts.FindNextEntry (func_start_entry); 3426 const addr_t section_end_file_addr = section_file_addr + symbol_section->GetByteSize(); 3427 if (next_func_start_entry) 3428 { 3429 addr_t next_symbol_file_addr = next_func_start_entry->addr; 3430 // Be sure the clear the Thumb address bit when we calculate the size 3431 // from the current and next address 3432 if (is_arm) 3433 next_symbol_file_addr &= 0xfffffffffffffffeull; 3434 symbol_byte_size = std::min<lldb::addr_t>(next_symbol_file_addr - symbol_file_addr, section_end_file_addr - symbol_file_addr); 3435 } 3436 else 3437 { 3438 symbol_byte_size = section_end_file_addr - symbol_file_addr; 3439 } 3440 } 3441 } 3442 symbol_value -= section_file_addr; 3443 } 3444 3445 if (is_debug == false) 3446 { 3447 if (type == eSymbolTypeCode) 3448 { 3449 // See if we can find a N_FUN entry for any code symbols. 3450 // If we do find a match, and the name matches, then we 3451 // can merge the two into just the function symbol to avoid 3452 // duplicate entries in the symbol table 3453 std::pair<ValueToSymbolIndexMap::const_iterator, ValueToSymbolIndexMap::const_iterator> range; 3454 range = N_FUN_addr_to_sym_idx.equal_range(nlist.n_value); 3455 if (range.first != range.second) 3456 { 3457 bool found_it = false; 3458 for (ValueToSymbolIndexMap::const_iterator pos = range.first; pos != range.second; ++pos) 3459 { 3460 if (sym[sym_idx].GetMangled().GetName(Mangled::ePreferMangled) == sym[pos->second].GetMangled().GetName(Mangled::ePreferMangled)) 3461 { 3462 m_nlist_idx_to_sym_idx[nlist_idx] = pos->second; 3463 // We just need the flags from the linker symbol, so put these flags 3464 // into the N_FUN flags to avoid duplicate symbols in the symbol table 3465 sym[pos->second].SetExternal(sym[sym_idx].IsExternal()); 3466 sym[pos->second].SetFlags (nlist.n_type << 16 | nlist.n_desc); 3467 if (resolver_addresses.find(nlist.n_value) != resolver_addresses.end()) 3468 sym[pos->second].SetType (eSymbolTypeResolver); 3469 sym[sym_idx].Clear(); 3470 found_it = true; 3471 break; 3472 } 3473 } 3474 if (found_it) 3475 continue; 3476 } 3477 else 3478 { 3479 if (resolver_addresses.find(nlist.n_value) != resolver_addresses.end()) 3480 type = eSymbolTypeResolver; 3481 } 3482 } 3483 else if (type == eSymbolTypeData || 3484 type == eSymbolTypeObjCClass || 3485 type == eSymbolTypeObjCMetaClass || 3486 type == eSymbolTypeObjCIVar ) 3487 { 3488 // See if we can find a N_STSYM entry for any data symbols. 3489 // If we do find a match, and the name matches, then we 3490 // can merge the two into just the Static symbol to avoid 3491 // duplicate entries in the symbol table 3492 std::pair<ValueToSymbolIndexMap::const_iterator, ValueToSymbolIndexMap::const_iterator> range; 3493 range = N_STSYM_addr_to_sym_idx.equal_range(nlist.n_value); 3494 if (range.first != range.second) 3495 { 3496 bool found_it = false; 3497 for (ValueToSymbolIndexMap::const_iterator pos = range.first; pos != range.second; ++pos) 3498 { 3499 if (sym[sym_idx].GetMangled().GetName(Mangled::ePreferMangled) == sym[pos->second].GetMangled().GetName(Mangled::ePreferMangled)) 3500 { 3501 m_nlist_idx_to_sym_idx[nlist_idx] = pos->second; 3502 // We just need the flags from the linker symbol, so put these flags 3503 // into the N_STSYM flags to avoid duplicate symbols in the symbol table 3504 sym[pos->second].SetExternal(sym[sym_idx].IsExternal()); 3505 sym[pos->second].SetFlags (nlist.n_type << 16 | nlist.n_desc); 3506 sym[sym_idx].Clear(); 3507 found_it = true; 3508 break; 3509 } 3510 } 3511 if (found_it) 3512 continue; 3513 } 3514 else 3515 { 3516 // Combine N_GSYM stab entries with the non stab symbol 3517 ConstNameToSymbolIndexMap::const_iterator pos = N_GSYM_name_to_sym_idx.find(sym[sym_idx].GetMangled().GetName(Mangled::ePreferMangled).GetCString()); 3518 if (pos != N_GSYM_name_to_sym_idx.end()) 3519 { 3520 const uint32_t GSYM_sym_idx = pos->second; 3521 m_nlist_idx_to_sym_idx[nlist_idx] = GSYM_sym_idx; 3522 // Copy the address, because often the N_GSYM address has an invalid address of zero 3523 // when the global is a common symbol 3524 sym[GSYM_sym_idx].GetAddress().SetSection (symbol_section); 3525 sym[GSYM_sym_idx].GetAddress().SetOffset (symbol_value); 3526 // We just need the flags from the linker symbol, so put these flags 3527 // into the N_GSYM flags to avoid duplicate symbols in the symbol table 3528 sym[GSYM_sym_idx].SetFlags (nlist.n_type << 16 | nlist.n_desc); 3529 sym[sym_idx].Clear(); 3530 continue; 3531 } 3532 } 3533 } 3534 } 3535 3536 sym[sym_idx].SetID (nlist_idx); 3537 sym[sym_idx].SetType (type); 3538 if (set_value) 3539 { 3540 sym[sym_idx].GetAddress().SetSection (symbol_section); 3541 sym[sym_idx].GetAddress().SetOffset (symbol_value); 3542 } 3543 sym[sym_idx].SetFlags (nlist.n_type << 16 | nlist.n_desc); 3544 3545 if (symbol_byte_size > 0) 3546 sym[sym_idx].SetByteSize(symbol_byte_size); 3547 3548 if (demangled_is_synthesized) 3549 sym[sym_idx].SetDemangledNameIsSynthesized(true); 3550 ++sym_idx; 3551 } 3552 else 3553 { 3554 sym[sym_idx].Clear(); 3555 } 3556 3557 } 3558 ///////////////////////////// 3559 } 3560 break; // No more entries to consider 3561 } 3562 } 3563 3564 for (const auto &pos :reexport_shlib_needs_fixup) 3565 { 3566 const auto undef_pos = undefined_name_to_desc.find(pos.second); 3567 if (undef_pos != undefined_name_to_desc.end()) 3568 { 3569 const uint8_t dylib_ordinal = llvm::MachO::GET_LIBRARY_ORDINAL(undef_pos->second); 3570 if (dylib_ordinal > 0 && dylib_ordinal < dylib_files.GetSize()) 3571 sym[pos.first].SetReExportedSymbolSharedLibrary(dylib_files.GetFileSpecAtIndex(dylib_ordinal-1)); 3572 } 3573 } 3574 } 3575 } 3576 } 3577 } 3578 } 3579 3580 // Must reset this in case it was mutated above! 3581 nlist_data_offset = 0; 3582 #endif 3583 3584 if (nlist_data.GetByteSize() > 0) 3585 { 3586 3587 // If the sym array was not created while parsing the DSC unmapped 3588 // symbols, create it now. 3589 if (sym == NULL) 3590 { 3591 sym = symtab->Resize (symtab_load_command.nsyms + m_dysymtab.nindirectsyms); 3592 num_syms = symtab->GetNumSymbols(); 3593 } 3594 3595 if (unmapped_local_symbols_found) 3596 { 3597 assert(m_dysymtab.ilocalsym == 0); 3598 nlist_data_offset += (m_dysymtab.nlocalsym * nlist_byte_size); 3599 nlist_idx = m_dysymtab.nlocalsym; 3600 } 3601 else 3602 { 3603 nlist_idx = 0; 3604 } 3605 3606 typedef std::map<ConstString, uint16_t> UndefinedNameToDescMap; 3607 typedef std::map<uint32_t, ConstString> SymbolIndexToName; 3608 UndefinedNameToDescMap undefined_name_to_desc; 3609 SymbolIndexToName reexport_shlib_needs_fixup; 3610 for (; nlist_idx < symtab_load_command.nsyms; ++nlist_idx) 3611 { 3612 struct nlist_64 nlist; 3613 if (!nlist_data.ValidOffsetForDataOfSize(nlist_data_offset, nlist_byte_size)) 3614 break; 3615 3616 nlist.n_strx = nlist_data.GetU32_unchecked(&nlist_data_offset); 3617 nlist.n_type = nlist_data.GetU8_unchecked (&nlist_data_offset); 3618 nlist.n_sect = nlist_data.GetU8_unchecked (&nlist_data_offset); 3619 nlist.n_desc = nlist_data.GetU16_unchecked (&nlist_data_offset); 3620 nlist.n_value = nlist_data.GetAddress_unchecked (&nlist_data_offset); 3621 3622 SymbolType type = eSymbolTypeInvalid; 3623 const char *symbol_name = NULL; 3624 3625 if (have_strtab_data) 3626 { 3627 symbol_name = strtab_data.PeekCStr(nlist.n_strx); 3628 3629 if (symbol_name == NULL) 3630 { 3631 // No symbol should be NULL, even the symbols with no 3632 // string values should have an offset zero which points 3633 // to an empty C-string 3634 Host::SystemLog (Host::eSystemLogError, 3635 "error: symbol[%u] has invalid string table offset 0x%x in %s, ignoring symbol\n", 3636 nlist_idx, 3637 nlist.n_strx, 3638 module_sp->GetFileSpec().GetPath().c_str()); 3639 continue; 3640 } 3641 if (symbol_name[0] == '\0') 3642 symbol_name = NULL; 3643 } 3644 else 3645 { 3646 const addr_t str_addr = strtab_addr + nlist.n_strx; 3647 Error str_error; 3648 if (process->ReadCStringFromMemory(str_addr, memory_symbol_name, str_error)) 3649 symbol_name = memory_symbol_name.c_str(); 3650 } 3651 const char *symbol_name_non_abi_mangled = NULL; 3652 3653 SectionSP symbol_section; 3654 lldb::addr_t symbol_byte_size = 0; 3655 bool add_nlist = true; 3656 bool is_gsym = false; 3657 bool is_debug = ((nlist.n_type & N_STAB) != 0); 3658 bool demangled_is_synthesized = false; 3659 bool set_value = true; 3660 assert (sym_idx < num_syms); 3661 3662 sym[sym_idx].SetDebug (is_debug); 3663 3664 if (is_debug) 3665 { 3666 switch (nlist.n_type) 3667 { 3668 case N_GSYM: 3669 // global symbol: name,,NO_SECT,type,0 3670 // Sometimes the N_GSYM value contains the address. 3671 3672 // FIXME: In the .o files, we have a GSYM and a debug symbol for all the ObjC data. They 3673 // have the same address, but we want to ensure that we always find only the real symbol, 3674 // 'cause we don't currently correctly attribute the GSYM one to the ObjCClass/Ivar/MetaClass 3675 // symbol type. This is a temporary hack to make sure the ObjectiveC symbols get treated 3676 // correctly. To do this right, we should coalesce all the GSYM & global symbols that have the 3677 // same address. 3678 is_gsym = true; 3679 sym[sym_idx].SetExternal(true); 3680 3681 if (symbol_name && symbol_name[0] == '_' && symbol_name[1] == 'O') 3682 { 3683 llvm::StringRef symbol_name_ref(symbol_name); 3684 if (symbol_name_ref.startswith(g_objc_v2_prefix_class)) 3685 { 3686 symbol_name_non_abi_mangled = symbol_name + 1; 3687 symbol_name = symbol_name + g_objc_v2_prefix_class.size(); 3688 type = eSymbolTypeObjCClass; 3689 demangled_is_synthesized = true; 3690 3691 } 3692 else if (symbol_name_ref.startswith(g_objc_v2_prefix_metaclass)) 3693 { 3694 symbol_name_non_abi_mangled = symbol_name + 1; 3695 symbol_name = symbol_name + g_objc_v2_prefix_metaclass.size(); 3696 type = eSymbolTypeObjCMetaClass; 3697 demangled_is_synthesized = true; 3698 } 3699 else if (symbol_name_ref.startswith(g_objc_v2_prefix_ivar)) 3700 { 3701 symbol_name_non_abi_mangled = symbol_name + 1; 3702 symbol_name = symbol_name + g_objc_v2_prefix_ivar.size(); 3703 type = eSymbolTypeObjCIVar; 3704 demangled_is_synthesized = true; 3705 } 3706 } 3707 else 3708 { 3709 if (nlist.n_value != 0) 3710 symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value); 3711 type = eSymbolTypeData; 3712 } 3713 break; 3714 3715 case N_FNAME: 3716 // procedure name (f77 kludge): name,,NO_SECT,0,0 3717 type = eSymbolTypeCompiler; 3718 break; 3719 3720 case N_FUN: 3721 // procedure: name,,n_sect,linenumber,address 3722 if (symbol_name) 3723 { 3724 type = eSymbolTypeCode; 3725 symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value); 3726 3727 N_FUN_addr_to_sym_idx.insert(std::make_pair(nlist.n_value, sym_idx)); 3728 // We use the current number of symbols in the symbol table in lieu of 3729 // using nlist_idx in case we ever start trimming entries out 3730 N_FUN_indexes.push_back(sym_idx); 3731 } 3732 else 3733 { 3734 type = eSymbolTypeCompiler; 3735 3736 if ( !N_FUN_indexes.empty() ) 3737 { 3738 // Copy the size of the function into the original STAB entry so we don't have 3739 // to hunt for it later 3740 symtab->SymbolAtIndex(N_FUN_indexes.back())->SetByteSize(nlist.n_value); 3741 N_FUN_indexes.pop_back(); 3742 // We don't really need the end function STAB as it contains the size which 3743 // we already placed with the original symbol, so don't add it if we want a 3744 // minimal symbol table 3745 add_nlist = false; 3746 } 3747 } 3748 break; 3749 3750 case N_STSYM: 3751 // static symbol: name,,n_sect,type,address 3752 N_STSYM_addr_to_sym_idx.insert(std::make_pair(nlist.n_value, sym_idx)); 3753 symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value); 3754 type = eSymbolTypeData; 3755 break; 3756 3757 case N_LCSYM: 3758 // .lcomm symbol: name,,n_sect,type,address 3759 symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value); 3760 type = eSymbolTypeCommonBlock; 3761 break; 3762 3763 case N_BNSYM: 3764 // We use the current number of symbols in the symbol table in lieu of 3765 // using nlist_idx in case we ever start trimming entries out 3766 // Skip these if we want minimal symbol tables 3767 add_nlist = false; 3768 break; 3769 3770 case N_ENSYM: 3771 // Set the size of the N_BNSYM to the terminating index of this N_ENSYM 3772 // so that we can always skip the entire symbol if we need to navigate 3773 // more quickly at the source level when parsing STABS 3774 // Skip these if we want minimal symbol tables 3775 add_nlist = false; 3776 break; 3777 3778 3779 case N_OPT: 3780 // emitted with gcc2_compiled and in gcc source 3781 type = eSymbolTypeCompiler; 3782 break; 3783 3784 case N_RSYM: 3785 // register sym: name,,NO_SECT,type,register 3786 type = eSymbolTypeVariable; 3787 break; 3788 3789 case N_SLINE: 3790 // src line: 0,,n_sect,linenumber,address 3791 symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value); 3792 type = eSymbolTypeLineEntry; 3793 break; 3794 3795 case N_SSYM: 3796 // structure elt: name,,NO_SECT,type,struct_offset 3797 type = eSymbolTypeVariableType; 3798 break; 3799 3800 case N_SO: 3801 // source file name 3802 type = eSymbolTypeSourceFile; 3803 if (symbol_name == NULL) 3804 { 3805 add_nlist = false; 3806 if (N_SO_index != UINT32_MAX) 3807 { 3808 // Set the size of the N_SO to the terminating index of this N_SO 3809 // so that we can always skip the entire N_SO if we need to navigate 3810 // more quickly at the source level when parsing STABS 3811 symbol_ptr = symtab->SymbolAtIndex(N_SO_index); 3812 symbol_ptr->SetByteSize(sym_idx); 3813 symbol_ptr->SetSizeIsSibling(true); 3814 } 3815 N_NSYM_indexes.clear(); 3816 N_INCL_indexes.clear(); 3817 N_BRAC_indexes.clear(); 3818 N_COMM_indexes.clear(); 3819 N_FUN_indexes.clear(); 3820 N_SO_index = UINT32_MAX; 3821 } 3822 else 3823 { 3824 // We use the current number of symbols in the symbol table in lieu of 3825 // using nlist_idx in case we ever start trimming entries out 3826 const bool N_SO_has_full_path = symbol_name[0] == '/'; 3827 if (N_SO_has_full_path) 3828 { 3829 if ((N_SO_index == sym_idx - 1) && ((sym_idx - 1) < num_syms)) 3830 { 3831 // We have two consecutive N_SO entries where the first contains a directory 3832 // and the second contains a full path. 3833 sym[sym_idx - 1].GetMangled().SetValue(ConstString(symbol_name), false); 3834 m_nlist_idx_to_sym_idx[nlist_idx] = sym_idx - 1; 3835 add_nlist = false; 3836 } 3837 else 3838 { 3839 // This is the first entry in a N_SO that contains a directory or 3840 // a full path to the source file 3841 N_SO_index = sym_idx; 3842 } 3843 } 3844 else if ((N_SO_index == sym_idx - 1) && ((sym_idx - 1) < num_syms)) 3845 { 3846 // This is usually the second N_SO entry that contains just the filename, 3847 // so here we combine it with the first one if we are minimizing the symbol table 3848 const char *so_path = sym[sym_idx - 1].GetMangled().GetDemangledName().AsCString(); 3849 if (so_path && so_path[0]) 3850 { 3851 std::string full_so_path (so_path); 3852 const size_t double_slash_pos = full_so_path.find("//"); 3853 if (double_slash_pos != std::string::npos) 3854 { 3855 // The linker has been generating bad N_SO entries with doubled up paths 3856 // in the format "%s%s" where the first string in the DW_AT_comp_dir, 3857 // and the second is the directory for the source file so you end up with 3858 // a path that looks like "/tmp/src//tmp/src/" 3859 FileSpec so_dir(so_path, false); 3860 if (!so_dir.Exists()) 3861 { 3862 so_dir.SetFile(&full_so_path[double_slash_pos + 1], false); 3863 if (so_dir.Exists()) 3864 { 3865 // Trim off the incorrect path 3866 full_so_path.erase(0, double_slash_pos + 1); 3867 } 3868 } 3869 } 3870 if (*full_so_path.rbegin() != '/') 3871 full_so_path += '/'; 3872 full_so_path += symbol_name; 3873 sym[sym_idx - 1].GetMangled().SetValue(ConstString(full_so_path.c_str()), false); 3874 add_nlist = false; 3875 m_nlist_idx_to_sym_idx[nlist_idx] = sym_idx - 1; 3876 } 3877 } 3878 else 3879 { 3880 // This could be a relative path to a N_SO 3881 N_SO_index = sym_idx; 3882 } 3883 } 3884 3885 break; 3886 3887 case N_OSO: 3888 // object file name: name,,0,0,st_mtime 3889 type = eSymbolTypeObjectFile; 3890 break; 3891 3892 case N_LSYM: 3893 // local sym: name,,NO_SECT,type,offset 3894 type = eSymbolTypeLocal; 3895 break; 3896 3897 //---------------------------------------------------------------------- 3898 // INCL scopes 3899 //---------------------------------------------------------------------- 3900 case N_BINCL: 3901 // include file beginning: name,,NO_SECT,0,sum 3902 // We use the current number of symbols in the symbol table in lieu of 3903 // using nlist_idx in case we ever start trimming entries out 3904 N_INCL_indexes.push_back(sym_idx); 3905 type = eSymbolTypeScopeBegin; 3906 break; 3907 3908 case N_EINCL: 3909 // include file end: name,,NO_SECT,0,0 3910 // Set the size of the N_BINCL to the terminating index of this N_EINCL 3911 // so that we can always skip the entire symbol if we need to navigate 3912 // more quickly at the source level when parsing STABS 3913 if ( !N_INCL_indexes.empty() ) 3914 { 3915 symbol_ptr = symtab->SymbolAtIndex(N_INCL_indexes.back()); 3916 symbol_ptr->SetByteSize(sym_idx + 1); 3917 symbol_ptr->SetSizeIsSibling(true); 3918 N_INCL_indexes.pop_back(); 3919 } 3920 type = eSymbolTypeScopeEnd; 3921 break; 3922 3923 case N_SOL: 3924 // #included file name: name,,n_sect,0,address 3925 type = eSymbolTypeHeaderFile; 3926 3927 // We currently don't use the header files on darwin 3928 add_nlist = false; 3929 break; 3930 3931 case N_PARAMS: 3932 // compiler parameters: name,,NO_SECT,0,0 3933 type = eSymbolTypeCompiler; 3934 break; 3935 3936 case N_VERSION: 3937 // compiler version: name,,NO_SECT,0,0 3938 type = eSymbolTypeCompiler; 3939 break; 3940 3941 case N_OLEVEL: 3942 // compiler -O level: name,,NO_SECT,0,0 3943 type = eSymbolTypeCompiler; 3944 break; 3945 3946 case N_PSYM: 3947 // parameter: name,,NO_SECT,type,offset 3948 type = eSymbolTypeVariable; 3949 break; 3950 3951 case N_ENTRY: 3952 // alternate entry: name,,n_sect,linenumber,address 3953 symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value); 3954 type = eSymbolTypeLineEntry; 3955 break; 3956 3957 //---------------------------------------------------------------------- 3958 // Left and Right Braces 3959 //---------------------------------------------------------------------- 3960 case N_LBRAC: 3961 // left bracket: 0,,NO_SECT,nesting level,address 3962 // We use the current number of symbols in the symbol table in lieu of 3963 // using nlist_idx in case we ever start trimming entries out 3964 symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value); 3965 N_BRAC_indexes.push_back(sym_idx); 3966 type = eSymbolTypeScopeBegin; 3967 break; 3968 3969 case N_RBRAC: 3970 // right bracket: 0,,NO_SECT,nesting level,address 3971 // Set the size of the N_LBRAC to the terminating index of this N_RBRAC 3972 // so that we can always skip the entire symbol if we need to navigate 3973 // more quickly at the source level when parsing STABS 3974 symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value); 3975 if ( !N_BRAC_indexes.empty() ) 3976 { 3977 symbol_ptr = symtab->SymbolAtIndex(N_BRAC_indexes.back()); 3978 symbol_ptr->SetByteSize(sym_idx + 1); 3979 symbol_ptr->SetSizeIsSibling(true); 3980 N_BRAC_indexes.pop_back(); 3981 } 3982 type = eSymbolTypeScopeEnd; 3983 break; 3984 3985 case N_EXCL: 3986 // deleted include file: name,,NO_SECT,0,sum 3987 type = eSymbolTypeHeaderFile; 3988 break; 3989 3990 //---------------------------------------------------------------------- 3991 // COMM scopes 3992 //---------------------------------------------------------------------- 3993 case N_BCOMM: 3994 // begin common: name,,NO_SECT,0,0 3995 // We use the current number of symbols in the symbol table in lieu of 3996 // using nlist_idx in case we ever start trimming entries out 3997 type = eSymbolTypeScopeBegin; 3998 N_COMM_indexes.push_back(sym_idx); 3999 break; 4000 4001 case N_ECOML: 4002 // end common (local name): 0,,n_sect,0,address 4003 symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value); 4004 // Fall through 4005 4006 case N_ECOMM: 4007 // end common: name,,n_sect,0,0 4008 // Set the size of the N_BCOMM to the terminating index of this N_ECOMM/N_ECOML 4009 // so that we can always skip the entire symbol if we need to navigate 4010 // more quickly at the source level when parsing STABS 4011 if ( !N_COMM_indexes.empty() ) 4012 { 4013 symbol_ptr = symtab->SymbolAtIndex(N_COMM_indexes.back()); 4014 symbol_ptr->SetByteSize(sym_idx + 1); 4015 symbol_ptr->SetSizeIsSibling(true); 4016 N_COMM_indexes.pop_back(); 4017 } 4018 type = eSymbolTypeScopeEnd; 4019 break; 4020 4021 case N_LENG: 4022 // second stab entry with length information 4023 type = eSymbolTypeAdditional; 4024 break; 4025 4026 default: break; 4027 } 4028 } 4029 else 4030 { 4031 //uint8_t n_pext = N_PEXT & nlist.n_type; 4032 uint8_t n_type = N_TYPE & nlist.n_type; 4033 sym[sym_idx].SetExternal((N_EXT & nlist.n_type) != 0); 4034 4035 switch (n_type) 4036 { 4037 case N_INDR: 4038 { 4039 const char *reexport_name_cstr = strtab_data.PeekCStr(nlist.n_value); 4040 if (reexport_name_cstr && reexport_name_cstr[0]) 4041 { 4042 type = eSymbolTypeReExported; 4043 ConstString reexport_name(reexport_name_cstr + ((reexport_name_cstr[0] == '_') ? 1 : 0)); 4044 sym[sym_idx].SetReExportedSymbolName(reexport_name); 4045 set_value = false; 4046 reexport_shlib_needs_fixup[sym_idx] = reexport_name; 4047 indirect_symbol_names.insert(ConstString(symbol_name + ((symbol_name[0] == '_') ? 1 : 0))); 4048 } 4049 else 4050 type = eSymbolTypeUndefined; 4051 } 4052 break; 4053 4054 case N_UNDF: 4055 if (symbol_name && symbol_name[0]) 4056 { 4057 ConstString undefined_name(symbol_name + ((symbol_name[0] == '_') ? 1 : 0)); 4058 undefined_name_to_desc[undefined_name] = nlist.n_desc; 4059 } 4060 // Fall through 4061 case N_PBUD: 4062 type = eSymbolTypeUndefined; 4063 break; 4064 4065 case N_ABS: 4066 type = eSymbolTypeAbsolute; 4067 break; 4068 4069 case N_SECT: 4070 { 4071 symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value); 4072 4073 if (!symbol_section) 4074 { 4075 // TODO: warn about this? 4076 add_nlist = false; 4077 break; 4078 } 4079 4080 if (TEXT_eh_frame_sectID == nlist.n_sect) 4081 { 4082 type = eSymbolTypeException; 4083 } 4084 else 4085 { 4086 uint32_t section_type = symbol_section->Get() & SECTION_TYPE; 4087 4088 switch (section_type) 4089 { 4090 case S_CSTRING_LITERALS: type = eSymbolTypeData; break; // section with only literal C strings 4091 case S_4BYTE_LITERALS: type = eSymbolTypeData; break; // section with only 4 byte literals 4092 case S_8BYTE_LITERALS: type = eSymbolTypeData; break; // section with only 8 byte literals 4093 case S_LITERAL_POINTERS: type = eSymbolTypeTrampoline; break; // section with only pointers to literals 4094 case S_NON_LAZY_SYMBOL_POINTERS: type = eSymbolTypeTrampoline; break; // section with only non-lazy symbol pointers 4095 case S_LAZY_SYMBOL_POINTERS: type = eSymbolTypeTrampoline; break; // section with only lazy symbol pointers 4096 case S_SYMBOL_STUBS: type = eSymbolTypeTrampoline; break; // section with only symbol stubs, byte size of stub in the reserved2 field 4097 case S_MOD_INIT_FUNC_POINTERS: type = eSymbolTypeCode; break; // section with only function pointers for initialization 4098 case S_MOD_TERM_FUNC_POINTERS: type = eSymbolTypeCode; break; // section with only function pointers for termination 4099 case S_INTERPOSING: type = eSymbolTypeTrampoline; break; // section with only pairs of function pointers for interposing 4100 case S_16BYTE_LITERALS: type = eSymbolTypeData; break; // section with only 16 byte literals 4101 case S_DTRACE_DOF: type = eSymbolTypeInstrumentation; break; 4102 case S_LAZY_DYLIB_SYMBOL_POINTERS: type = eSymbolTypeTrampoline; break; 4103 default: 4104 switch (symbol_section->GetType()) 4105 { 4106 case lldb::eSectionTypeCode: 4107 type = eSymbolTypeCode; 4108 break; 4109 case eSectionTypeData: 4110 case eSectionTypeDataCString: // Inlined C string data 4111 case eSectionTypeDataCStringPointers: // Pointers to C string data 4112 case eSectionTypeDataSymbolAddress: // Address of a symbol in the symbol table 4113 case eSectionTypeData4: 4114 case eSectionTypeData8: 4115 case eSectionTypeData16: 4116 type = eSymbolTypeData; 4117 break; 4118 default: 4119 break; 4120 } 4121 break; 4122 } 4123 4124 if (type == eSymbolTypeInvalid) 4125 { 4126 const char *symbol_sect_name = symbol_section->GetName().AsCString(); 4127 if (symbol_section->IsDescendant (text_section_sp.get())) 4128 { 4129 if (symbol_section->IsClear(S_ATTR_PURE_INSTRUCTIONS | 4130 S_ATTR_SELF_MODIFYING_CODE | 4131 S_ATTR_SOME_INSTRUCTIONS)) 4132 type = eSymbolTypeData; 4133 else 4134 type = eSymbolTypeCode; 4135 } 4136 else 4137 if (symbol_section->IsDescendant(data_section_sp.get())) 4138 { 4139 if (symbol_sect_name && ::strstr (symbol_sect_name, "__objc") == symbol_sect_name) 4140 { 4141 type = eSymbolTypeRuntime; 4142 4143 if (symbol_name && 4144 symbol_name[0] == '_' && 4145 symbol_name[1] == 'O' && 4146 symbol_name[2] == 'B') 4147 { 4148 llvm::StringRef symbol_name_ref(symbol_name); 4149 if (symbol_name_ref.startswith(g_objc_v2_prefix_class)) 4150 { 4151 symbol_name_non_abi_mangled = symbol_name + 1; 4152 symbol_name = symbol_name + g_objc_v2_prefix_class.size(); 4153 type = eSymbolTypeObjCClass; 4154 demangled_is_synthesized = true; 4155 } 4156 else if (symbol_name_ref.startswith(g_objc_v2_prefix_metaclass)) 4157 { 4158 symbol_name_non_abi_mangled = symbol_name + 1; 4159 symbol_name = symbol_name + g_objc_v2_prefix_metaclass.size(); 4160 type = eSymbolTypeObjCMetaClass; 4161 demangled_is_synthesized = true; 4162 } 4163 else if (symbol_name_ref.startswith(g_objc_v2_prefix_ivar)) 4164 { 4165 symbol_name_non_abi_mangled = symbol_name + 1; 4166 symbol_name = symbol_name + g_objc_v2_prefix_ivar.size(); 4167 type = eSymbolTypeObjCIVar; 4168 demangled_is_synthesized = true; 4169 } 4170 } 4171 } 4172 else 4173 if (symbol_sect_name && ::strstr (symbol_sect_name, "__gcc_except_tab") == symbol_sect_name) 4174 { 4175 type = eSymbolTypeException; 4176 } 4177 else 4178 { 4179 type = eSymbolTypeData; 4180 } 4181 } 4182 else 4183 if (symbol_sect_name && ::strstr (symbol_sect_name, "__IMPORT") == symbol_sect_name) 4184 { 4185 type = eSymbolTypeTrampoline; 4186 } 4187 else 4188 if (symbol_section->IsDescendant(objc_section_sp.get())) 4189 { 4190 type = eSymbolTypeRuntime; 4191 if (symbol_name && symbol_name[0] == '.') 4192 { 4193 llvm::StringRef symbol_name_ref(symbol_name); 4194 static const llvm::StringRef g_objc_v1_prefix_class (".objc_class_name_"); 4195 if (symbol_name_ref.startswith(g_objc_v1_prefix_class)) 4196 { 4197 symbol_name_non_abi_mangled = symbol_name; 4198 symbol_name = symbol_name + g_objc_v1_prefix_class.size(); 4199 type = eSymbolTypeObjCClass; 4200 demangled_is_synthesized = true; 4201 } 4202 } 4203 } 4204 } 4205 } 4206 } 4207 break; 4208 } 4209 } 4210 4211 if (add_nlist) 4212 { 4213 uint64_t symbol_value = nlist.n_value; 4214 4215 if (symbol_name_non_abi_mangled) 4216 { 4217 sym[sym_idx].GetMangled().SetMangledName (ConstString(symbol_name_non_abi_mangled)); 4218 sym[sym_idx].GetMangled().SetDemangledName (ConstString(symbol_name)); 4219 } 4220 else 4221 { 4222 bool symbol_name_is_mangled = false; 4223 4224 if (symbol_name && symbol_name[0] == '_') 4225 { 4226 symbol_name_is_mangled = symbol_name[1] == '_'; 4227 symbol_name++; // Skip the leading underscore 4228 } 4229 4230 if (symbol_name) 4231 { 4232 ConstString const_symbol_name(symbol_name); 4233 sym[sym_idx].GetMangled().SetValue(const_symbol_name, symbol_name_is_mangled); 4234 } 4235 } 4236 4237 if (is_gsym) 4238 N_GSYM_name_to_sym_idx[sym[sym_idx].GetMangled().GetName(Mangled::ePreferMangled).GetCString()] = sym_idx; 4239 4240 if (symbol_section) 4241 { 4242 const addr_t section_file_addr = symbol_section->GetFileAddress(); 4243 if (symbol_byte_size == 0 && function_starts_count > 0) 4244 { 4245 addr_t symbol_lookup_file_addr = nlist.n_value; 4246 // Do an exact address match for non-ARM addresses, else get the closest since 4247 // the symbol might be a thumb symbol which has an address with bit zero set 4248 FunctionStarts::Entry *func_start_entry = function_starts.FindEntry (symbol_lookup_file_addr, !is_arm); 4249 if (is_arm && func_start_entry) 4250 { 4251 // Verify that the function start address is the symbol address (ARM) 4252 // or the symbol address + 1 (thumb) 4253 if (func_start_entry->addr != symbol_lookup_file_addr && 4254 func_start_entry->addr != (symbol_lookup_file_addr + 1)) 4255 { 4256 // Not the right entry, NULL it out... 4257 func_start_entry = NULL; 4258 } 4259 } 4260 if (func_start_entry) 4261 { 4262 func_start_entry->data = true; 4263 4264 addr_t symbol_file_addr = func_start_entry->addr; 4265 if (is_arm) 4266 symbol_file_addr &= 0xfffffffffffffffeull; 4267 4268 const FunctionStarts::Entry *next_func_start_entry = function_starts.FindNextEntry (func_start_entry); 4269 const addr_t section_end_file_addr = section_file_addr + symbol_section->GetByteSize(); 4270 if (next_func_start_entry) 4271 { 4272 addr_t next_symbol_file_addr = next_func_start_entry->addr; 4273 // Be sure the clear the Thumb address bit when we calculate the size 4274 // from the current and next address 4275 if (is_arm) 4276 next_symbol_file_addr &= 0xfffffffffffffffeull; 4277 symbol_byte_size = std::min<lldb::addr_t>(next_symbol_file_addr - symbol_file_addr, section_end_file_addr - symbol_file_addr); 4278 } 4279 else 4280 { 4281 symbol_byte_size = section_end_file_addr - symbol_file_addr; 4282 } 4283 } 4284 } 4285 symbol_value -= section_file_addr; 4286 } 4287 4288 if (is_debug == false) 4289 { 4290 if (type == eSymbolTypeCode) 4291 { 4292 // See if we can find a N_FUN entry for any code symbols. 4293 // If we do find a match, and the name matches, then we 4294 // can merge the two into just the function symbol to avoid 4295 // duplicate entries in the symbol table 4296 std::pair<ValueToSymbolIndexMap::const_iterator, ValueToSymbolIndexMap::const_iterator> range; 4297 range = N_FUN_addr_to_sym_idx.equal_range(nlist.n_value); 4298 if (range.first != range.second) 4299 { 4300 bool found_it = false; 4301 for (ValueToSymbolIndexMap::const_iterator pos = range.first; pos != range.second; ++pos) 4302 { 4303 if (sym[sym_idx].GetMangled().GetName(Mangled::ePreferMangled) == sym[pos->second].GetMangled().GetName(Mangled::ePreferMangled)) 4304 { 4305 m_nlist_idx_to_sym_idx[nlist_idx] = pos->second; 4306 // We just need the flags from the linker symbol, so put these flags 4307 // into the N_FUN flags to avoid duplicate symbols in the symbol table 4308 sym[pos->second].SetExternal(sym[sym_idx].IsExternal()); 4309 sym[pos->second].SetFlags (nlist.n_type << 16 | nlist.n_desc); 4310 if (resolver_addresses.find(nlist.n_value) != resolver_addresses.end()) 4311 sym[pos->second].SetType (eSymbolTypeResolver); 4312 sym[sym_idx].Clear(); 4313 found_it = true; 4314 break; 4315 } 4316 } 4317 if (found_it) 4318 continue; 4319 } 4320 else 4321 { 4322 if (resolver_addresses.find(nlist.n_value) != resolver_addresses.end()) 4323 type = eSymbolTypeResolver; 4324 } 4325 } 4326 else if (type == eSymbolTypeData || 4327 type == eSymbolTypeObjCClass || 4328 type == eSymbolTypeObjCMetaClass || 4329 type == eSymbolTypeObjCIVar ) 4330 { 4331 // See if we can find a N_STSYM entry for any data symbols. 4332 // If we do find a match, and the name matches, then we 4333 // can merge the two into just the Static symbol to avoid 4334 // duplicate entries in the symbol table 4335 std::pair<ValueToSymbolIndexMap::const_iterator, ValueToSymbolIndexMap::const_iterator> range; 4336 range = N_STSYM_addr_to_sym_idx.equal_range(nlist.n_value); 4337 if (range.first != range.second) 4338 { 4339 bool found_it = false; 4340 for (ValueToSymbolIndexMap::const_iterator pos = range.first; pos != range.second; ++pos) 4341 { 4342 if (sym[sym_idx].GetMangled().GetName(Mangled::ePreferMangled) == sym[pos->second].GetMangled().GetName(Mangled::ePreferMangled)) 4343 { 4344 m_nlist_idx_to_sym_idx[nlist_idx] = pos->second; 4345 // We just need the flags from the linker symbol, so put these flags 4346 // into the N_STSYM flags to avoid duplicate symbols in the symbol table 4347 sym[pos->second].SetExternal(sym[sym_idx].IsExternal()); 4348 sym[pos->second].SetFlags (nlist.n_type << 16 | nlist.n_desc); 4349 sym[sym_idx].Clear(); 4350 found_it = true; 4351 break; 4352 } 4353 } 4354 if (found_it) 4355 continue; 4356 } 4357 else 4358 { 4359 // Combine N_GSYM stab entries with the non stab symbol 4360 ConstNameToSymbolIndexMap::const_iterator pos = N_GSYM_name_to_sym_idx.find(sym[sym_idx].GetMangled().GetName(Mangled::ePreferMangled).GetCString()); 4361 if (pos != N_GSYM_name_to_sym_idx.end()) 4362 { 4363 const uint32_t GSYM_sym_idx = pos->second; 4364 m_nlist_idx_to_sym_idx[nlist_idx] = GSYM_sym_idx; 4365 // Copy the address, because often the N_GSYM address has an invalid address of zero 4366 // when the global is a common symbol 4367 sym[GSYM_sym_idx].GetAddress().SetSection (symbol_section); 4368 sym[GSYM_sym_idx].GetAddress().SetOffset (symbol_value); 4369 // We just need the flags from the linker symbol, so put these flags 4370 // into the N_GSYM flags to avoid duplicate symbols in the symbol table 4371 sym[GSYM_sym_idx].SetFlags (nlist.n_type << 16 | nlist.n_desc); 4372 sym[sym_idx].Clear(); 4373 continue; 4374 } 4375 } 4376 } 4377 } 4378 4379 sym[sym_idx].SetID (nlist_idx); 4380 sym[sym_idx].SetType (type); 4381 if (set_value) 4382 { 4383 sym[sym_idx].GetAddress().SetSection (symbol_section); 4384 sym[sym_idx].GetAddress().SetOffset (symbol_value); 4385 } 4386 sym[sym_idx].SetFlags (nlist.n_type << 16 | nlist.n_desc); 4387 4388 if (symbol_byte_size > 0) 4389 sym[sym_idx].SetByteSize(symbol_byte_size); 4390 4391 if (demangled_is_synthesized) 4392 sym[sym_idx].SetDemangledNameIsSynthesized(true); 4393 4394 ++sym_idx; 4395 } 4396 else 4397 { 4398 sym[sym_idx].Clear(); 4399 } 4400 } 4401 4402 for (const auto &pos :reexport_shlib_needs_fixup) 4403 { 4404 const auto undef_pos = undefined_name_to_desc.find(pos.second); 4405 if (undef_pos != undefined_name_to_desc.end()) 4406 { 4407 const uint8_t dylib_ordinal = llvm::MachO::GET_LIBRARY_ORDINAL(undef_pos->second); 4408 if (dylib_ordinal > 0 && dylib_ordinal < dylib_files.GetSize()) 4409 sym[pos.first].SetReExportedSymbolSharedLibrary(dylib_files.GetFileSpecAtIndex(dylib_ordinal-1)); 4410 } 4411 } 4412 4413 } 4414 4415 uint32_t synthetic_sym_id = symtab_load_command.nsyms; 4416 4417 if (function_starts_count > 0) 4418 { 4419 char synthetic_function_symbol[PATH_MAX]; 4420 uint32_t num_synthetic_function_symbols = 0; 4421 for (i=0; i<function_starts_count; ++i) 4422 { 4423 if (function_starts.GetEntryRef (i).data == false) 4424 ++num_synthetic_function_symbols; 4425 } 4426 4427 if (num_synthetic_function_symbols > 0) 4428 { 4429 if (num_syms < sym_idx + num_synthetic_function_symbols) 4430 { 4431 num_syms = sym_idx + num_synthetic_function_symbols; 4432 sym = symtab->Resize (num_syms); 4433 } 4434 uint32_t synthetic_function_symbol_idx = 0; 4435 for (i=0; i<function_starts_count; ++i) 4436 { 4437 const FunctionStarts::Entry *func_start_entry = function_starts.GetEntryAtIndex (i); 4438 if (func_start_entry->data == false) 4439 { 4440 addr_t symbol_file_addr = func_start_entry->addr; 4441 uint32_t symbol_flags = 0; 4442 if (is_arm) 4443 { 4444 if (symbol_file_addr & 1) 4445 symbol_flags = MACHO_NLIST_ARM_SYMBOL_IS_THUMB; 4446 symbol_file_addr &= 0xfffffffffffffffeull; 4447 } 4448 Address symbol_addr; 4449 if (module_sp->ResolveFileAddress (symbol_file_addr, symbol_addr)) 4450 { 4451 SectionSP symbol_section (symbol_addr.GetSection()); 4452 uint32_t symbol_byte_size = 0; 4453 if (symbol_section) 4454 { 4455 const addr_t section_file_addr = symbol_section->GetFileAddress(); 4456 const FunctionStarts::Entry *next_func_start_entry = function_starts.FindNextEntry (func_start_entry); 4457 const addr_t section_end_file_addr = section_file_addr + symbol_section->GetByteSize(); 4458 if (next_func_start_entry) 4459 { 4460 addr_t next_symbol_file_addr = next_func_start_entry->addr; 4461 if (is_arm) 4462 next_symbol_file_addr &= 0xfffffffffffffffeull; 4463 symbol_byte_size = std::min<lldb::addr_t>(next_symbol_file_addr - symbol_file_addr, section_end_file_addr - symbol_file_addr); 4464 } 4465 else 4466 { 4467 symbol_byte_size = section_end_file_addr - symbol_file_addr; 4468 } 4469 snprintf (synthetic_function_symbol, 4470 sizeof(synthetic_function_symbol), 4471 "___lldb_unnamed_function%u$$%s", 4472 ++synthetic_function_symbol_idx, 4473 module_sp->GetFileSpec().GetFilename().GetCString()); 4474 sym[sym_idx].SetID (synthetic_sym_id++); 4475 sym[sym_idx].GetMangled().SetDemangledName(ConstString(synthetic_function_symbol)); 4476 sym[sym_idx].SetType (eSymbolTypeCode); 4477 sym[sym_idx].SetIsSynthetic (true); 4478 sym[sym_idx].GetAddress() = symbol_addr; 4479 if (symbol_flags) 4480 sym[sym_idx].SetFlags (symbol_flags); 4481 if (symbol_byte_size) 4482 sym[sym_idx].SetByteSize (symbol_byte_size); 4483 ++sym_idx; 4484 } 4485 } 4486 } 4487 } 4488 } 4489 } 4490 4491 // Trim our symbols down to just what we ended up with after 4492 // removing any symbols. 4493 if (sym_idx < num_syms) 4494 { 4495 num_syms = sym_idx; 4496 sym = symtab->Resize (num_syms); 4497 } 4498 4499 // Now synthesize indirect symbols 4500 if (m_dysymtab.nindirectsyms != 0) 4501 { 4502 if (indirect_symbol_index_data.GetByteSize()) 4503 { 4504 NListIndexToSymbolIndexMap::const_iterator end_index_pos = m_nlist_idx_to_sym_idx.end(); 4505 4506 for (uint32_t sect_idx = 1; sect_idx < m_mach_sections.size(); ++sect_idx) 4507 { 4508 if ((m_mach_sections[sect_idx].flags & SECTION_TYPE) == S_SYMBOL_STUBS) 4509 { 4510 uint32_t symbol_stub_byte_size = m_mach_sections[sect_idx].reserved2; 4511 if (symbol_stub_byte_size == 0) 4512 continue; 4513 4514 const uint32_t num_symbol_stubs = m_mach_sections[sect_idx].size / symbol_stub_byte_size; 4515 4516 if (num_symbol_stubs == 0) 4517 continue; 4518 4519 const uint32_t symbol_stub_index_offset = m_mach_sections[sect_idx].reserved1; 4520 for (uint32_t stub_idx = 0; stub_idx < num_symbol_stubs; ++stub_idx) 4521 { 4522 const uint32_t symbol_stub_index = symbol_stub_index_offset + stub_idx; 4523 const lldb::addr_t symbol_stub_addr = m_mach_sections[sect_idx].addr + (stub_idx * symbol_stub_byte_size); 4524 lldb::offset_t symbol_stub_offset = symbol_stub_index * 4; 4525 if (indirect_symbol_index_data.ValidOffsetForDataOfSize(symbol_stub_offset, 4)) 4526 { 4527 const uint32_t stub_sym_id = indirect_symbol_index_data.GetU32 (&symbol_stub_offset); 4528 if (stub_sym_id & (INDIRECT_SYMBOL_ABS | INDIRECT_SYMBOL_LOCAL)) 4529 continue; 4530 4531 NListIndexToSymbolIndexMap::const_iterator index_pos = m_nlist_idx_to_sym_idx.find (stub_sym_id); 4532 Symbol *stub_symbol = NULL; 4533 if (index_pos != end_index_pos) 4534 { 4535 // We have a remapping from the original nlist index to 4536 // a current symbol index, so just look this up by index 4537 stub_symbol = symtab->SymbolAtIndex (index_pos->second); 4538 } 4539 else 4540 { 4541 // We need to lookup a symbol using the original nlist 4542 // symbol index since this index is coming from the 4543 // S_SYMBOL_STUBS 4544 stub_symbol = symtab->FindSymbolByID (stub_sym_id); 4545 } 4546 4547 if (stub_symbol) 4548 { 4549 Address so_addr(symbol_stub_addr, section_list); 4550 4551 if (stub_symbol->GetType() == eSymbolTypeUndefined) 4552 { 4553 // Change the external symbol into a trampoline that makes sense 4554 // These symbols were N_UNDF N_EXT, and are useless to us, so we 4555 // can re-use them so we don't have to make up a synthetic symbol 4556 // for no good reason. 4557 if (resolver_addresses.find(symbol_stub_addr) == resolver_addresses.end()) 4558 stub_symbol->SetType (eSymbolTypeTrampoline); 4559 else 4560 stub_symbol->SetType (eSymbolTypeResolver); 4561 stub_symbol->SetExternal (false); 4562 stub_symbol->GetAddress() = so_addr; 4563 stub_symbol->SetByteSize (symbol_stub_byte_size); 4564 } 4565 else 4566 { 4567 // Make a synthetic symbol to describe the trampoline stub 4568 Mangled stub_symbol_mangled_name(stub_symbol->GetMangled()); 4569 if (sym_idx >= num_syms) 4570 { 4571 sym = symtab->Resize (++num_syms); 4572 stub_symbol = NULL; // this pointer no longer valid 4573 } 4574 sym[sym_idx].SetID (synthetic_sym_id++); 4575 sym[sym_idx].GetMangled() = stub_symbol_mangled_name; 4576 if (resolver_addresses.find(symbol_stub_addr) == resolver_addresses.end()) 4577 sym[sym_idx].SetType (eSymbolTypeTrampoline); 4578 else 4579 sym[sym_idx].SetType (eSymbolTypeResolver); 4580 sym[sym_idx].SetIsSynthetic (true); 4581 sym[sym_idx].GetAddress() = so_addr; 4582 sym[sym_idx].SetByteSize (symbol_stub_byte_size); 4583 ++sym_idx; 4584 } 4585 } 4586 else 4587 { 4588 if (log) 4589 log->Warning ("symbol stub referencing symbol table symbol %u that isn't in our minimal symbol table, fix this!!!", stub_sym_id); 4590 } 4591 } 4592 } 4593 } 4594 } 4595 } 4596 } 4597 4598 4599 if (!trie_entries.empty()) 4600 { 4601 for (const auto &e : trie_entries) 4602 { 4603 if (e.entry.import_name) 4604 { 4605 // Only add indirect symbols from the Trie entries if we 4606 // didn't have a N_INDR nlist entry for this already 4607 if (indirect_symbol_names.find(e.entry.name) == indirect_symbol_names.end()) 4608 { 4609 // Make a synthetic symbol to describe re-exported symbol. 4610 if (sym_idx >= num_syms) 4611 sym = symtab->Resize (++num_syms); 4612 sym[sym_idx].SetID (synthetic_sym_id++); 4613 sym[sym_idx].GetMangled() = Mangled(e.entry.name); 4614 sym[sym_idx].SetType (eSymbolTypeReExported); 4615 sym[sym_idx].SetIsSynthetic (true); 4616 sym[sym_idx].SetReExportedSymbolName(e.entry.import_name); 4617 if (e.entry.other > 0 && e.entry.other <= dylib_files.GetSize()) 4618 { 4619 sym[sym_idx].SetReExportedSymbolSharedLibrary(dylib_files.GetFileSpecAtIndex(e.entry.other-1)); 4620 } 4621 ++sym_idx; 4622 } 4623 } 4624 } 4625 } 4626 4627 4628 4629 // StreamFile s(stdout, false); 4630 // s.Printf ("Symbol table before CalculateSymbolSizes():\n"); 4631 // symtab->Dump(&s, NULL, eSortOrderNone); 4632 // Set symbol byte sizes correctly since mach-o nlist entries don't have sizes 4633 symtab->CalculateSymbolSizes(); 4634 4635 // s.Printf ("Symbol table after CalculateSymbolSizes():\n"); 4636 // symtab->Dump(&s, NULL, eSortOrderNone); 4637 4638 return symtab->GetNumSymbols(); 4639 } 4640 return 0; 4641 } 4642 4643 4644 void 4645 ObjectFileMachO::Dump (Stream *s) 4646 { 4647 ModuleSP module_sp(GetModule()); 4648 if (module_sp) 4649 { 4650 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 4651 s->Printf("%p: ", static_cast<void*>(this)); 4652 s->Indent(); 4653 if (m_header.magic == MH_MAGIC_64 || m_header.magic == MH_CIGAM_64) 4654 s->PutCString("ObjectFileMachO64"); 4655 else 4656 s->PutCString("ObjectFileMachO32"); 4657 4658 ArchSpec header_arch; 4659 GetArchitecture(header_arch); 4660 4661 *s << ", file = '" << m_file << "', arch = " << header_arch.GetArchitectureName() << "\n"; 4662 4663 SectionList *sections = GetSectionList(); 4664 if (sections) 4665 sections->Dump(s, NULL, true, UINT32_MAX); 4666 4667 if (m_symtab_ap.get()) 4668 m_symtab_ap->Dump(s, NULL, eSortOrderNone); 4669 } 4670 } 4671 4672 bool 4673 ObjectFileMachO::GetUUID (const llvm::MachO::mach_header &header, 4674 const lldb_private::DataExtractor &data, 4675 lldb::offset_t lc_offset, 4676 lldb_private::UUID& uuid) 4677 { 4678 uint32_t i; 4679 struct uuid_command load_cmd; 4680 4681 lldb::offset_t offset = lc_offset; 4682 for (i=0; i<header.ncmds; ++i) 4683 { 4684 const lldb::offset_t cmd_offset = offset; 4685 if (data.GetU32(&offset, &load_cmd, 2) == NULL) 4686 break; 4687 4688 if (load_cmd.cmd == LC_UUID) 4689 { 4690 const uint8_t *uuid_bytes = data.PeekData(offset, 16); 4691 4692 if (uuid_bytes) 4693 { 4694 // OpenCL on Mac OS X uses the same UUID for each of its object files. 4695 // We pretend these object files have no UUID to prevent crashing. 4696 4697 const uint8_t opencl_uuid[] = { 0x8c, 0x8e, 0xb3, 0x9b, 4698 0x3b, 0xa8, 4699 0x4b, 0x16, 4700 0xb6, 0xa4, 4701 0x27, 0x63, 0xbb, 0x14, 0xf0, 0x0d }; 4702 4703 if (!memcmp(uuid_bytes, opencl_uuid, 16)) 4704 return false; 4705 4706 uuid.SetBytes (uuid_bytes); 4707 return true; 4708 } 4709 return false; 4710 } 4711 offset = cmd_offset + load_cmd.cmdsize; 4712 } 4713 return false; 4714 } 4715 4716 4717 bool 4718 ObjectFileMachO::GetArchitecture (const llvm::MachO::mach_header &header, 4719 const lldb_private::DataExtractor &data, 4720 lldb::offset_t lc_offset, 4721 ArchSpec &arch) 4722 { 4723 arch.SetArchitecture (eArchTypeMachO, header.cputype, header.cpusubtype); 4724 4725 if (arch.IsValid()) 4726 { 4727 llvm::Triple &triple = arch.GetTriple(); 4728 if (header.filetype == MH_PRELOAD) 4729 { 4730 // Set OS to "unknown" - this is a standalone binary with no dyld et al 4731 triple.setOS(llvm::Triple::UnknownOS); 4732 return true; 4733 } 4734 else 4735 { 4736 struct load_command load_cmd; 4737 4738 lldb::offset_t offset = lc_offset; 4739 for (uint32_t i=0; i<header.ncmds; ++i) 4740 { 4741 const lldb::offset_t cmd_offset = offset; 4742 if (data.GetU32(&offset, &load_cmd, 2) == NULL) 4743 break; 4744 4745 switch (load_cmd.cmd) 4746 { 4747 case LC_VERSION_MIN_IPHONEOS: 4748 triple.setOS (llvm::Triple::IOS); 4749 return true; 4750 4751 case LC_VERSION_MIN_MACOSX: 4752 triple.setOS (llvm::Triple::MacOSX); 4753 return true; 4754 4755 default: 4756 break; 4757 } 4758 4759 offset = cmd_offset + load_cmd.cmdsize; 4760 } 4761 4762 // Only set the OS to iOS for ARM, we don't want to set it for x86 and x86_64. 4763 // We do this because we now have MacOSX or iOS as the OS value for x86 and 4764 // x86_64 for normal desktop (MacOSX) and simulator (iOS) binaries. And if 4765 // we compare a "x86_64-apple-ios" to a "x86_64-apple-" triple, it will say 4766 // it is compatible (because the OS is unspecified in the second one and will 4767 // match anything in the first 4768 if (header.cputype == CPU_TYPE_ARM || header.cputype == CPU_TYPE_ARM64) 4769 triple.setOS (llvm::Triple::IOS); 4770 } 4771 } 4772 return arch.IsValid(); 4773 } 4774 4775 bool 4776 ObjectFileMachO::GetUUID (lldb_private::UUID* uuid) 4777 { 4778 ModuleSP module_sp(GetModule()); 4779 if (module_sp) 4780 { 4781 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 4782 lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); 4783 return GetUUID (m_header, m_data, offset, *uuid); 4784 } 4785 return false; 4786 } 4787 4788 4789 uint32_t 4790 ObjectFileMachO::GetDependentModules (FileSpecList& files) 4791 { 4792 uint32_t count = 0; 4793 ModuleSP module_sp(GetModule()); 4794 if (module_sp) 4795 { 4796 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 4797 struct load_command load_cmd; 4798 lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); 4799 std::vector<std::string> rpath_paths; 4800 std::vector<std::string> rpath_relative_paths; 4801 const bool resolve_path = false; // Don't resolve the dependent file paths since they may not reside on this system 4802 uint32_t i; 4803 for (i=0; i<m_header.ncmds; ++i) 4804 { 4805 const uint32_t cmd_offset = offset; 4806 if (m_data.GetU32(&offset, &load_cmd, 2) == NULL) 4807 break; 4808 4809 switch (load_cmd.cmd) 4810 { 4811 case LC_RPATH: 4812 case LC_LOAD_DYLIB: 4813 case LC_LOAD_WEAK_DYLIB: 4814 case LC_REEXPORT_DYLIB: 4815 case LC_LOAD_DYLINKER: 4816 case LC_LOADFVMLIB: 4817 case LC_LOAD_UPWARD_DYLIB: 4818 { 4819 uint32_t name_offset = cmd_offset + m_data.GetU32(&offset); 4820 const char *path = m_data.PeekCStr(name_offset); 4821 if (path) 4822 { 4823 if (load_cmd.cmd == LC_RPATH) 4824 rpath_paths.push_back(path); 4825 else 4826 { 4827 if (path[0] == '@') 4828 { 4829 if (strncmp(path, "@rpath", strlen("@rpath")) == 0) 4830 rpath_relative_paths.push_back(path + strlen("@rpath")); 4831 } 4832 else 4833 { 4834 FileSpec file_spec(path, resolve_path); 4835 if (files.AppendIfUnique(file_spec)) 4836 count++; 4837 } 4838 } 4839 } 4840 } 4841 break; 4842 4843 default: 4844 break; 4845 } 4846 offset = cmd_offset + load_cmd.cmdsize; 4847 } 4848 4849 if (!rpath_paths.empty()) 4850 { 4851 // Fixup all LC_RPATH values to be absolute paths 4852 FileSpec this_file_spec(m_file); 4853 this_file_spec.ResolvePath(); 4854 std::string loader_path("@loader_path"); 4855 std::string executable_path("@executable_path"); 4856 for (auto &rpath : rpath_paths) 4857 { 4858 if (rpath.find(loader_path) == 0) 4859 { 4860 rpath.erase(0, loader_path.size()); 4861 rpath.insert(0, this_file_spec.GetDirectory().GetCString()); 4862 } 4863 else if (rpath.find(executable_path) == 0) 4864 { 4865 rpath.erase(0, executable_path.size()); 4866 rpath.insert(0, this_file_spec.GetDirectory().GetCString()); 4867 } 4868 } 4869 4870 for (const auto &rpath_relative_path : rpath_relative_paths) 4871 { 4872 for (const auto &rpath : rpath_paths) 4873 { 4874 std::string path = rpath; 4875 path += rpath_relative_path; 4876 // It is OK to resolve this path because we must find a file on 4877 // disk for us to accept it anyway if it is rpath relative. 4878 FileSpec file_spec(path, true); 4879 // Remove any redundant parts of the path (like "../foo") since 4880 // LC_RPATH values often contain "..". 4881 file_spec.NormalizePath (); 4882 if (file_spec.Exists() && files.AppendIfUnique(file_spec)) 4883 { 4884 count++; 4885 break; 4886 } 4887 } 4888 } 4889 } 4890 } 4891 return count; 4892 } 4893 4894 lldb_private::Address 4895 ObjectFileMachO::GetEntryPointAddress () 4896 { 4897 // If the object file is not an executable it can't hold the entry point. m_entry_point_address 4898 // is initialized to an invalid address, so we can just return that. 4899 // If m_entry_point_address is valid it means we've found it already, so return the cached value. 4900 4901 if (!IsExecutable() || m_entry_point_address.IsValid()) 4902 return m_entry_point_address; 4903 4904 // Otherwise, look for the UnixThread or Thread command. The data for the Thread command is given in 4905 // /usr/include/mach-o.h, but it is basically: 4906 // 4907 // uint32_t flavor - this is the flavor argument you would pass to thread_get_state 4908 // uint32_t count - this is the count of longs in the thread state data 4909 // struct XXX_thread_state state - this is the structure from <machine/thread_status.h> corresponding to the flavor. 4910 // <repeat this trio> 4911 // 4912 // So we just keep reading the various register flavors till we find the GPR one, then read the PC out of there. 4913 // FIXME: We will need to have a "RegisterContext data provider" class at some point that can get all the registers 4914 // out of data in this form & attach them to a given thread. That should underlie the MacOS X User process plugin, 4915 // and we'll also need it for the MacOS X Core File process plugin. When we have that we can also use it here. 4916 // 4917 // For now we hard-code the offsets and flavors we need: 4918 // 4919 // 4920 4921 ModuleSP module_sp(GetModule()); 4922 if (module_sp) 4923 { 4924 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 4925 struct load_command load_cmd; 4926 lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); 4927 uint32_t i; 4928 lldb::addr_t start_address = LLDB_INVALID_ADDRESS; 4929 bool done = false; 4930 4931 for (i=0; i<m_header.ncmds; ++i) 4932 { 4933 const lldb::offset_t cmd_offset = offset; 4934 if (m_data.GetU32(&offset, &load_cmd, 2) == NULL) 4935 break; 4936 4937 switch (load_cmd.cmd) 4938 { 4939 case LC_UNIXTHREAD: 4940 case LC_THREAD: 4941 { 4942 while (offset < cmd_offset + load_cmd.cmdsize) 4943 { 4944 uint32_t flavor = m_data.GetU32(&offset); 4945 uint32_t count = m_data.GetU32(&offset); 4946 if (count == 0) 4947 { 4948 // We've gotten off somehow, log and exit; 4949 return m_entry_point_address; 4950 } 4951 4952 switch (m_header.cputype) 4953 { 4954 case llvm::MachO::CPU_TYPE_ARM: 4955 if (flavor == 1) // ARM_THREAD_STATE from mach/arm/thread_status.h 4956 { 4957 offset += 60; // This is the offset of pc in the GPR thread state data structure. 4958 start_address = m_data.GetU32(&offset); 4959 done = true; 4960 } 4961 break; 4962 case llvm::MachO::CPU_TYPE_ARM64: 4963 if (flavor == 6) // ARM_THREAD_STATE64 from mach/arm/thread_status.h 4964 { 4965 offset += 256; // This is the offset of pc in the GPR thread state data structure. 4966 start_address = m_data.GetU64(&offset); 4967 done = true; 4968 } 4969 break; 4970 case llvm::MachO::CPU_TYPE_I386: 4971 if (flavor == 1) // x86_THREAD_STATE32 from mach/i386/thread_status.h 4972 { 4973 offset += 40; // This is the offset of eip in the GPR thread state data structure. 4974 start_address = m_data.GetU32(&offset); 4975 done = true; 4976 } 4977 break; 4978 case llvm::MachO::CPU_TYPE_X86_64: 4979 if (flavor == 4) // x86_THREAD_STATE64 from mach/i386/thread_status.h 4980 { 4981 offset += 16 * 8; // This is the offset of rip in the GPR thread state data structure. 4982 start_address = m_data.GetU64(&offset); 4983 done = true; 4984 } 4985 break; 4986 default: 4987 return m_entry_point_address; 4988 } 4989 // Haven't found the GPR flavor yet, skip over the data for this flavor: 4990 if (done) 4991 break; 4992 offset += count * 4; 4993 } 4994 } 4995 break; 4996 case LC_MAIN: 4997 { 4998 ConstString text_segment_name ("__TEXT"); 4999 uint64_t entryoffset = m_data.GetU64(&offset); 5000 SectionSP text_segment_sp = GetSectionList()->FindSectionByName(text_segment_name); 5001 if (text_segment_sp) 5002 { 5003 done = true; 5004 start_address = text_segment_sp->GetFileAddress() + entryoffset; 5005 } 5006 } 5007 5008 default: 5009 break; 5010 } 5011 if (done) 5012 break; 5013 5014 // Go to the next load command: 5015 offset = cmd_offset + load_cmd.cmdsize; 5016 } 5017 5018 if (start_address != LLDB_INVALID_ADDRESS) 5019 { 5020 // We got the start address from the load commands, so now resolve that address in the sections 5021 // of this ObjectFile: 5022 if (!m_entry_point_address.ResolveAddressUsingFileSections (start_address, GetSectionList())) 5023 { 5024 m_entry_point_address.Clear(); 5025 } 5026 } 5027 else 5028 { 5029 // We couldn't read the UnixThread load command - maybe it wasn't there. As a fallback look for the 5030 // "start" symbol in the main executable. 5031 5032 ModuleSP module_sp (GetModule()); 5033 5034 if (module_sp) 5035 { 5036 SymbolContextList contexts; 5037 SymbolContext context; 5038 if (module_sp->FindSymbolsWithNameAndType(ConstString ("start"), eSymbolTypeCode, contexts)) 5039 { 5040 if (contexts.GetContextAtIndex(0, context)) 5041 m_entry_point_address = context.symbol->GetAddress(); 5042 } 5043 } 5044 } 5045 } 5046 5047 return m_entry_point_address; 5048 5049 } 5050 5051 lldb_private::Address 5052 ObjectFileMachO::GetHeaderAddress () 5053 { 5054 lldb_private::Address header_addr; 5055 SectionList *section_list = GetSectionList(); 5056 if (section_list) 5057 { 5058 SectionSP text_segment_sp (section_list->FindSectionByName (GetSegmentNameTEXT())); 5059 if (text_segment_sp) 5060 { 5061 header_addr.SetSection (text_segment_sp); 5062 header_addr.SetOffset (0); 5063 } 5064 } 5065 return header_addr; 5066 } 5067 5068 uint32_t 5069 ObjectFileMachO::GetNumThreadContexts () 5070 { 5071 ModuleSP module_sp(GetModule()); 5072 if (module_sp) 5073 { 5074 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 5075 if (!m_thread_context_offsets_valid) 5076 { 5077 m_thread_context_offsets_valid = true; 5078 lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); 5079 FileRangeArray::Entry file_range; 5080 thread_command thread_cmd; 5081 for (uint32_t i=0; i<m_header.ncmds; ++i) 5082 { 5083 const uint32_t cmd_offset = offset; 5084 if (m_data.GetU32(&offset, &thread_cmd, 2) == NULL) 5085 break; 5086 5087 if (thread_cmd.cmd == LC_THREAD) 5088 { 5089 file_range.SetRangeBase (offset); 5090 file_range.SetByteSize (thread_cmd.cmdsize - 8); 5091 m_thread_context_offsets.Append (file_range); 5092 } 5093 offset = cmd_offset + thread_cmd.cmdsize; 5094 } 5095 } 5096 } 5097 return m_thread_context_offsets.GetSize(); 5098 } 5099 5100 lldb::RegisterContextSP 5101 ObjectFileMachO::GetThreadContextAtIndex (uint32_t idx, lldb_private::Thread &thread) 5102 { 5103 lldb::RegisterContextSP reg_ctx_sp; 5104 5105 ModuleSP module_sp(GetModule()); 5106 if (module_sp) 5107 { 5108 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 5109 if (!m_thread_context_offsets_valid) 5110 GetNumThreadContexts (); 5111 5112 const FileRangeArray::Entry *thread_context_file_range = m_thread_context_offsets.GetEntryAtIndex (idx); 5113 if (thread_context_file_range) 5114 { 5115 5116 DataExtractor data (m_data, 5117 thread_context_file_range->GetRangeBase(), 5118 thread_context_file_range->GetByteSize()); 5119 5120 switch (m_header.cputype) 5121 { 5122 case llvm::MachO::CPU_TYPE_ARM64: 5123 reg_ctx_sp.reset (new RegisterContextDarwin_arm64_Mach (thread, data)); 5124 break; 5125 5126 case llvm::MachO::CPU_TYPE_ARM: 5127 reg_ctx_sp.reset (new RegisterContextDarwin_arm_Mach (thread, data)); 5128 break; 5129 5130 case llvm::MachO::CPU_TYPE_I386: 5131 reg_ctx_sp.reset (new RegisterContextDarwin_i386_Mach (thread, data)); 5132 break; 5133 5134 case llvm::MachO::CPU_TYPE_X86_64: 5135 reg_ctx_sp.reset (new RegisterContextDarwin_x86_64_Mach (thread, data)); 5136 break; 5137 } 5138 } 5139 } 5140 return reg_ctx_sp; 5141 } 5142 5143 5144 ObjectFile::Type 5145 ObjectFileMachO::CalculateType() 5146 { 5147 switch (m_header.filetype) 5148 { 5149 case MH_OBJECT: // 0x1u 5150 if (GetAddressByteSize () == 4) 5151 { 5152 // 32 bit kexts are just object files, but they do have a valid 5153 // UUID load command. 5154 UUID uuid; 5155 if (GetUUID(&uuid)) 5156 { 5157 // this checking for the UUID load command is not enough 5158 // we could eventually look for the symbol named 5159 // "OSKextGetCurrentIdentifier" as this is required of kexts 5160 if (m_strata == eStrataInvalid) 5161 m_strata = eStrataKernel; 5162 return eTypeSharedLibrary; 5163 } 5164 } 5165 return eTypeObjectFile; 5166 5167 case MH_EXECUTE: return eTypeExecutable; // 0x2u 5168 case MH_FVMLIB: return eTypeSharedLibrary; // 0x3u 5169 case MH_CORE: return eTypeCoreFile; // 0x4u 5170 case MH_PRELOAD: return eTypeSharedLibrary; // 0x5u 5171 case MH_DYLIB: return eTypeSharedLibrary; // 0x6u 5172 case MH_DYLINKER: return eTypeDynamicLinker; // 0x7u 5173 case MH_BUNDLE: return eTypeSharedLibrary; // 0x8u 5174 case MH_DYLIB_STUB: return eTypeStubLibrary; // 0x9u 5175 case MH_DSYM: return eTypeDebugInfo; // 0xAu 5176 case MH_KEXT_BUNDLE: return eTypeSharedLibrary; // 0xBu 5177 default: 5178 break; 5179 } 5180 return eTypeUnknown; 5181 } 5182 5183 ObjectFile::Strata 5184 ObjectFileMachO::CalculateStrata() 5185 { 5186 switch (m_header.filetype) 5187 { 5188 case MH_OBJECT: // 0x1u 5189 { 5190 // 32 bit kexts are just object files, but they do have a valid 5191 // UUID load command. 5192 UUID uuid; 5193 if (GetUUID(&uuid)) 5194 { 5195 // this checking for the UUID load command is not enough 5196 // we could eventually look for the symbol named 5197 // "OSKextGetCurrentIdentifier" as this is required of kexts 5198 if (m_type == eTypeInvalid) 5199 m_type = eTypeSharedLibrary; 5200 5201 return eStrataKernel; 5202 } 5203 } 5204 return eStrataUnknown; 5205 5206 case MH_EXECUTE: // 0x2u 5207 // Check for the MH_DYLDLINK bit in the flags 5208 if (m_header.flags & MH_DYLDLINK) 5209 { 5210 return eStrataUser; 5211 } 5212 else 5213 { 5214 SectionList *section_list = GetSectionList(); 5215 if (section_list) 5216 { 5217 static ConstString g_kld_section_name ("__KLD"); 5218 if (section_list->FindSectionByName(g_kld_section_name)) 5219 return eStrataKernel; 5220 } 5221 } 5222 return eStrataRawImage; 5223 5224 case MH_FVMLIB: return eStrataUser; // 0x3u 5225 case MH_CORE: return eStrataUnknown; // 0x4u 5226 case MH_PRELOAD: return eStrataRawImage; // 0x5u 5227 case MH_DYLIB: return eStrataUser; // 0x6u 5228 case MH_DYLINKER: return eStrataUser; // 0x7u 5229 case MH_BUNDLE: return eStrataUser; // 0x8u 5230 case MH_DYLIB_STUB: return eStrataUser; // 0x9u 5231 case MH_DSYM: return eStrataUnknown; // 0xAu 5232 case MH_KEXT_BUNDLE: return eStrataKernel; // 0xBu 5233 default: 5234 break; 5235 } 5236 return eStrataUnknown; 5237 } 5238 5239 5240 uint32_t 5241 ObjectFileMachO::GetVersion (uint32_t *versions, uint32_t num_versions) 5242 { 5243 ModuleSP module_sp(GetModule()); 5244 if (module_sp) 5245 { 5246 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 5247 struct dylib_command load_cmd; 5248 lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); 5249 uint32_t version_cmd = 0; 5250 uint64_t version = 0; 5251 uint32_t i; 5252 for (i=0; i<m_header.ncmds; ++i) 5253 { 5254 const lldb::offset_t cmd_offset = offset; 5255 if (m_data.GetU32(&offset, &load_cmd, 2) == NULL) 5256 break; 5257 5258 if (load_cmd.cmd == LC_ID_DYLIB) 5259 { 5260 if (version_cmd == 0) 5261 { 5262 version_cmd = load_cmd.cmd; 5263 if (m_data.GetU32(&offset, &load_cmd.dylib, 4) == NULL) 5264 break; 5265 version = load_cmd.dylib.current_version; 5266 } 5267 break; // Break for now unless there is another more complete version 5268 // number load command in the future. 5269 } 5270 offset = cmd_offset + load_cmd.cmdsize; 5271 } 5272 5273 if (version_cmd == LC_ID_DYLIB) 5274 { 5275 if (versions != NULL && num_versions > 0) 5276 { 5277 if (num_versions > 0) 5278 versions[0] = (version & 0xFFFF0000ull) >> 16; 5279 if (num_versions > 1) 5280 versions[1] = (version & 0x0000FF00ull) >> 8; 5281 if (num_versions > 2) 5282 versions[2] = (version & 0x000000FFull); 5283 // Fill in an remaining version numbers with invalid values 5284 for (i=3; i<num_versions; ++i) 5285 versions[i] = UINT32_MAX; 5286 } 5287 // The LC_ID_DYLIB load command has a version with 3 version numbers 5288 // in it, so always return 3 5289 return 3; 5290 } 5291 } 5292 return false; 5293 } 5294 5295 bool 5296 ObjectFileMachO::GetArchitecture (ArchSpec &arch) 5297 { 5298 ModuleSP module_sp(GetModule()); 5299 if (module_sp) 5300 { 5301 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 5302 return GetArchitecture (m_header, m_data, MachHeaderSizeFromMagic(m_header.magic), arch); 5303 } 5304 return false; 5305 } 5306 5307 5308 UUID 5309 ObjectFileMachO::GetProcessSharedCacheUUID (Process *process) 5310 { 5311 UUID uuid; 5312 if (process) 5313 { 5314 addr_t all_image_infos = process->GetImageInfoAddress(); 5315 5316 // The address returned by GetImageInfoAddress may be the address of dyld (don't want) 5317 // or it may be the address of the dyld_all_image_infos structure (want). The first four 5318 // bytes will be either the version field (all_image_infos) or a Mach-O file magic constant. 5319 // Version 13 and higher of dyld_all_image_infos is required to get the sharedCacheUUID field. 5320 5321 Error err; 5322 uint32_t version_or_magic = process->ReadUnsignedIntegerFromMemory (all_image_infos, 4, -1, err); 5323 if (version_or_magic != static_cast<uint32_t>(-1) 5324 && version_or_magic != MH_MAGIC 5325 && version_or_magic != MH_CIGAM 5326 && version_or_magic != MH_MAGIC_64 5327 && version_or_magic != MH_CIGAM_64 5328 && version_or_magic >= 13) 5329 { 5330 addr_t sharedCacheUUID_address = LLDB_INVALID_ADDRESS; 5331 int wordsize = process->GetAddressByteSize(); 5332 if (wordsize == 8) 5333 { 5334 sharedCacheUUID_address = all_image_infos + 160; // sharedCacheUUID <mach-o/dyld_images.h> 5335 } 5336 if (wordsize == 4) 5337 { 5338 sharedCacheUUID_address = all_image_infos + 84; // sharedCacheUUID <mach-o/dyld_images.h> 5339 } 5340 if (sharedCacheUUID_address != LLDB_INVALID_ADDRESS) 5341 { 5342 uuid_t shared_cache_uuid; 5343 if (process->ReadMemory (sharedCacheUUID_address, shared_cache_uuid, sizeof (uuid_t), err) == sizeof (uuid_t)) 5344 { 5345 uuid.SetBytes (shared_cache_uuid); 5346 } 5347 } 5348 } 5349 } 5350 return uuid; 5351 } 5352 5353 UUID 5354 ObjectFileMachO::GetLLDBSharedCacheUUID () 5355 { 5356 UUID uuid; 5357 #if defined (__APPLE__) && (defined (__arm__) || defined (__arm64__) || defined (__aarch64__)) 5358 uint8_t *(*dyld_get_all_image_infos)(void); 5359 dyld_get_all_image_infos = (uint8_t*(*)()) dlsym (RTLD_DEFAULT, "_dyld_get_all_image_infos"); 5360 if (dyld_get_all_image_infos) 5361 { 5362 uint8_t *dyld_all_image_infos_address = dyld_get_all_image_infos(); 5363 if (dyld_all_image_infos_address) 5364 { 5365 uint32_t *version = (uint32_t*) dyld_all_image_infos_address; // version <mach-o/dyld_images.h> 5366 if (*version >= 13) 5367 { 5368 uuid_t *sharedCacheUUID_address = 0; 5369 int wordsize = sizeof (uint8_t *); 5370 if (wordsize == 8) 5371 { 5372 sharedCacheUUID_address = (uuid_t*) ((uint8_t*) dyld_all_image_infos_address + 160); // sharedCacheUUID <mach-o/dyld_images.h> 5373 } 5374 else 5375 { 5376 sharedCacheUUID_address = (uuid_t*) ((uint8_t*) dyld_all_image_infos_address + 84); // sharedCacheUUID <mach-o/dyld_images.h> 5377 } 5378 uuid.SetBytes (sharedCacheUUID_address); 5379 } 5380 } 5381 } 5382 #endif 5383 return uuid; 5384 } 5385 5386 uint32_t 5387 ObjectFileMachO::GetMinimumOSVersion (uint32_t *versions, uint32_t num_versions) 5388 { 5389 if (m_min_os_versions.empty()) 5390 { 5391 lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); 5392 bool success = false; 5393 for (uint32_t i=0; success == false && i < m_header.ncmds; ++i) 5394 { 5395 const lldb::offset_t load_cmd_offset = offset; 5396 5397 version_min_command lc; 5398 if (m_data.GetU32(&offset, &lc.cmd, 2) == NULL) 5399 break; 5400 if (lc.cmd == LC_VERSION_MIN_MACOSX || lc.cmd == LC_VERSION_MIN_IPHONEOS) 5401 { 5402 if (m_data.GetU32 (&offset, &lc.version, (sizeof(lc) / sizeof(uint32_t)) - 2)) 5403 { 5404 const uint32_t xxxx = lc.version >> 16; 5405 const uint32_t yy = (lc.version >> 8) & 0xffu; 5406 const uint32_t zz = lc.version & 0xffu; 5407 if (xxxx) 5408 { 5409 m_min_os_versions.push_back(xxxx); 5410 m_min_os_versions.push_back(yy); 5411 m_min_os_versions.push_back(zz); 5412 } 5413 success = true; 5414 } 5415 } 5416 offset = load_cmd_offset + lc.cmdsize; 5417 } 5418 5419 if (success == false) 5420 { 5421 // Push an invalid value so we don't keep trying to 5422 m_min_os_versions.push_back(UINT32_MAX); 5423 } 5424 } 5425 5426 if (m_min_os_versions.size() > 1 || m_min_os_versions[0] != UINT32_MAX) 5427 { 5428 if (versions != NULL && num_versions > 0) 5429 { 5430 for (size_t i=0; i<num_versions; ++i) 5431 { 5432 if (i < m_min_os_versions.size()) 5433 versions[i] = m_min_os_versions[i]; 5434 else 5435 versions[i] = 0; 5436 } 5437 } 5438 return m_min_os_versions.size(); 5439 } 5440 // Call the superclasses version that will empty out the data 5441 return ObjectFile::GetMinimumOSVersion (versions, num_versions); 5442 } 5443 5444 uint32_t 5445 ObjectFileMachO::GetSDKVersion(uint32_t *versions, uint32_t num_versions) 5446 { 5447 if (m_sdk_versions.empty()) 5448 { 5449 lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); 5450 bool success = false; 5451 for (uint32_t i=0; success == false && i < m_header.ncmds; ++i) 5452 { 5453 const lldb::offset_t load_cmd_offset = offset; 5454 5455 version_min_command lc; 5456 if (m_data.GetU32(&offset, &lc.cmd, 2) == NULL) 5457 break; 5458 if (lc.cmd == LC_VERSION_MIN_MACOSX || lc.cmd == LC_VERSION_MIN_IPHONEOS) 5459 { 5460 if (m_data.GetU32 (&offset, &lc.version, (sizeof(lc) / sizeof(uint32_t)) - 2)) 5461 { 5462 const uint32_t xxxx = lc.sdk >> 16; 5463 const uint32_t yy = (lc.sdk >> 8) & 0xffu; 5464 const uint32_t zz = lc.sdk & 0xffu; 5465 if (xxxx) 5466 { 5467 m_sdk_versions.push_back(xxxx); 5468 m_sdk_versions.push_back(yy); 5469 m_sdk_versions.push_back(zz); 5470 } 5471 success = true; 5472 } 5473 } 5474 offset = load_cmd_offset + lc.cmdsize; 5475 } 5476 5477 if (success == false) 5478 { 5479 // Push an invalid value so we don't keep trying to 5480 m_sdk_versions.push_back(UINT32_MAX); 5481 } 5482 } 5483 5484 if (m_sdk_versions.size() > 1 || m_sdk_versions[0] != UINT32_MAX) 5485 { 5486 if (versions != NULL && num_versions > 0) 5487 { 5488 for (size_t i=0; i<num_versions; ++i) 5489 { 5490 if (i < m_sdk_versions.size()) 5491 versions[i] = m_sdk_versions[i]; 5492 else 5493 versions[i] = 0; 5494 } 5495 } 5496 return m_sdk_versions.size(); 5497 } 5498 // Call the superclasses version that will empty out the data 5499 return ObjectFile::GetSDKVersion (versions, num_versions); 5500 } 5501 5502 5503 bool 5504 ObjectFileMachO::GetIsDynamicLinkEditor() 5505 { 5506 return m_header.filetype == llvm::MachO::MH_DYLINKER; 5507 } 5508 5509 //------------------------------------------------------------------ 5510 // PluginInterface protocol 5511 //------------------------------------------------------------------ 5512 lldb_private::ConstString 5513 ObjectFileMachO::GetPluginName() 5514 { 5515 return GetPluginNameStatic(); 5516 } 5517 5518 uint32_t 5519 ObjectFileMachO::GetPluginVersion() 5520 { 5521 return 1; 5522 } 5523 5524 5525 Section * 5526 ObjectFileMachO::GetMachHeaderSection() 5527 { 5528 // Find the first address of the mach header which is the first non-zero 5529 // file sized section whose file offset is zero. This is the base file address 5530 // of the mach-o file which can be subtracted from the vmaddr of the other 5531 // segments found in memory and added to the load address 5532 ModuleSP module_sp = GetModule(); 5533 if (module_sp) 5534 { 5535 SectionList *section_list = GetSectionList (); 5536 if (section_list) 5537 { 5538 lldb::addr_t mach_base_file_addr = LLDB_INVALID_ADDRESS; 5539 const size_t num_sections = section_list->GetSize(); 5540 5541 for (size_t sect_idx = 0; 5542 sect_idx < num_sections && mach_base_file_addr == LLDB_INVALID_ADDRESS; 5543 ++sect_idx) 5544 { 5545 Section *section = section_list->GetSectionAtIndex (sect_idx).get(); 5546 if (section && 5547 section->GetFileSize() > 0 && 5548 section->GetFileOffset() == 0 && 5549 section->IsThreadSpecific() == false && 5550 module_sp.get() == section->GetModule().get()) 5551 { 5552 return section; 5553 } 5554 } 5555 } 5556 } 5557 return nullptr; 5558 } 5559 5560 lldb::addr_t 5561 ObjectFileMachO::CalculateSectionLoadAddressForMemoryImage(lldb::addr_t mach_header_load_address, const Section *mach_header_section, const Section *section) 5562 { 5563 ModuleSP module_sp = GetModule(); 5564 if (module_sp && mach_header_section && section && mach_header_load_address != LLDB_INVALID_ADDRESS) 5565 { 5566 lldb::addr_t mach_header_file_addr = mach_header_section->GetFileAddress(); 5567 if (mach_header_file_addr != LLDB_INVALID_ADDRESS) 5568 { 5569 if (section && 5570 section->GetFileSize() > 0 && 5571 section->IsThreadSpecific() == false && 5572 module_sp.get() == section->GetModule().get()) 5573 { 5574 // Ignore __LINKEDIT and __DWARF segments 5575 if (section->GetName() == GetSegmentNameLINKEDIT()) 5576 { 5577 // Only map __LINKEDIT if we have an in memory image and this isn't 5578 // a kernel binary like a kext or mach_kernel. 5579 const bool is_memory_image = (bool)m_process_wp.lock(); 5580 const Strata strata = GetStrata(); 5581 if (is_memory_image == false || strata == eStrataKernel) 5582 return LLDB_INVALID_ADDRESS; 5583 } 5584 return section->GetFileAddress() - mach_header_file_addr + mach_header_load_address; 5585 } 5586 } 5587 } 5588 return LLDB_INVALID_ADDRESS; 5589 } 5590 5591 bool 5592 ObjectFileMachO::SetLoadAddress (Target &target, 5593 lldb::addr_t value, 5594 bool value_is_offset) 5595 { 5596 ModuleSP module_sp = GetModule(); 5597 if (module_sp) 5598 { 5599 size_t num_loaded_sections = 0; 5600 SectionList *section_list = GetSectionList (); 5601 if (section_list) 5602 { 5603 const size_t num_sections = section_list->GetSize(); 5604 5605 if (value_is_offset) 5606 { 5607 // "value" is an offset to apply to each top level segment 5608 for (size_t sect_idx = 0; sect_idx < num_sections; ++sect_idx) 5609 { 5610 // Iterate through the object file sections to find all 5611 // of the sections that size on disk (to avoid __PAGEZERO) 5612 // and load them 5613 SectionSP section_sp (section_list->GetSectionAtIndex (sect_idx)); 5614 if (section_sp && 5615 section_sp->GetFileSize() > 0 && 5616 section_sp->IsThreadSpecific() == false && 5617 module_sp.get() == section_sp->GetModule().get()) 5618 { 5619 // Ignore __LINKEDIT and __DWARF segments 5620 if (section_sp->GetName() == GetSegmentNameLINKEDIT()) 5621 { 5622 // Only map __LINKEDIT if we have an in memory image and this isn't 5623 // a kernel binary like a kext or mach_kernel. 5624 const bool is_memory_image = (bool)m_process_wp.lock(); 5625 const Strata strata = GetStrata(); 5626 if (is_memory_image == false || strata == eStrataKernel) 5627 continue; 5628 } 5629 if (target.GetSectionLoadList().SetSectionLoadAddress (section_sp, section_sp->GetFileAddress() + value)) 5630 ++num_loaded_sections; 5631 } 5632 } 5633 } 5634 else 5635 { 5636 // "value" is the new base address of the mach_header, adjust each 5637 // section accordingly 5638 5639 Section *mach_header_section = GetMachHeaderSection(); 5640 if (mach_header_section) 5641 { 5642 for (size_t sect_idx = 0; sect_idx < num_sections; ++sect_idx) 5643 { 5644 SectionSP section_sp (section_list->GetSectionAtIndex (sect_idx)); 5645 5646 lldb::addr_t section_load_addr = CalculateSectionLoadAddressForMemoryImage(value, mach_header_section, section_sp.get()); 5647 if (section_load_addr != LLDB_INVALID_ADDRESS) 5648 { 5649 if (target.GetSectionLoadList().SetSectionLoadAddress (section_sp, section_load_addr)) 5650 ++num_loaded_sections; 5651 } 5652 } 5653 } 5654 } 5655 } 5656 return num_loaded_sections > 0; 5657 } 5658 return false; 5659 } 5660 5661 bool 5662 ObjectFileMachO::SaveCore (const lldb::ProcessSP &process_sp, 5663 const FileSpec &outfile, 5664 Error &error) 5665 { 5666 if (process_sp) 5667 { 5668 Target &target = process_sp->GetTarget(); 5669 const ArchSpec target_arch = target.GetArchitecture(); 5670 const llvm::Triple &target_triple = target_arch.GetTriple(); 5671 if (target_triple.getVendor() == llvm::Triple::Apple && 5672 (target_triple.getOS() == llvm::Triple::MacOSX || 5673 target_triple.getOS() == llvm::Triple::IOS)) 5674 { 5675 bool make_core = false; 5676 switch (target_arch.GetMachine()) 5677 { 5678 // arm64 core file writing is having some problem with writing down the 5679 // dyld shared images info struct and/or the main executable binary. May 5680 // turn out to be a debugserver problem, not sure yet. 5681 // case llvm::Triple::aarch64: 5682 5683 case llvm::Triple::arm: 5684 case llvm::Triple::x86: 5685 case llvm::Triple::x86_64: 5686 make_core = true; 5687 break; 5688 default: 5689 error.SetErrorStringWithFormat ("unsupported core architecture: %s", target_triple.str().c_str()); 5690 break; 5691 } 5692 5693 if (make_core) 5694 { 5695 std::vector<segment_command_64> segment_load_commands; 5696 // uint32_t range_info_idx = 0; 5697 MemoryRegionInfo range_info; 5698 Error range_error = process_sp->GetMemoryRegionInfo(0, range_info); 5699 const uint32_t addr_byte_size = target_arch.GetAddressByteSize(); 5700 const ByteOrder byte_order = target_arch.GetByteOrder(); 5701 if (range_error.Success()) 5702 { 5703 while (range_info.GetRange().GetRangeBase() != LLDB_INVALID_ADDRESS) 5704 { 5705 const addr_t addr = range_info.GetRange().GetRangeBase(); 5706 const addr_t size = range_info.GetRange().GetByteSize(); 5707 5708 if (size == 0) 5709 break; 5710 5711 // Calculate correct protections 5712 uint32_t prot = 0; 5713 if (range_info.GetReadable() == MemoryRegionInfo::eYes) 5714 prot |= VM_PROT_READ; 5715 if (range_info.GetWritable() == MemoryRegionInfo::eYes) 5716 prot |= VM_PROT_WRITE; 5717 if (range_info.GetExecutable() == MemoryRegionInfo::eYes) 5718 prot |= VM_PROT_EXECUTE; 5719 5720 // printf ("[%3u] [0x%16.16" PRIx64 " - 0x%16.16" PRIx64 ") %c%c%c\n", 5721 // range_info_idx, 5722 // addr, 5723 // size, 5724 // (prot & VM_PROT_READ ) ? 'r' : '-', 5725 // (prot & VM_PROT_WRITE ) ? 'w' : '-', 5726 // (prot & VM_PROT_EXECUTE) ? 'x' : '-'); 5727 5728 if (prot != 0) 5729 { 5730 uint32_t cmd_type = LC_SEGMENT_64; 5731 uint32_t segment_size = sizeof (segment_command_64); 5732 if (addr_byte_size == 4) 5733 { 5734 cmd_type = LC_SEGMENT; 5735 segment_size = sizeof (segment_command); 5736 } 5737 segment_command_64 segment = { 5738 cmd_type, // uint32_t cmd; 5739 segment_size, // uint32_t cmdsize; 5740 {0}, // char segname[16]; 5741 addr, // uint64_t vmaddr; // uint32_t for 32-bit Mach-O 5742 size, // uint64_t vmsize; // uint32_t for 32-bit Mach-O 5743 0, // uint64_t fileoff; // uint32_t for 32-bit Mach-O 5744 size, // uint64_t filesize; // uint32_t for 32-bit Mach-O 5745 prot, // uint32_t maxprot; 5746 prot, // uint32_t initprot; 5747 0, // uint32_t nsects; 5748 0 }; // uint32_t flags; 5749 segment_load_commands.push_back(segment); 5750 } 5751 else 5752 { 5753 // No protections and a size of 1 used to be returned from old 5754 // debugservers when we asked about a region that was past the 5755 // last memory region and it indicates the end... 5756 if (size == 1) 5757 break; 5758 } 5759 5760 range_error = process_sp->GetMemoryRegionInfo(range_info.GetRange().GetRangeEnd(), range_info); 5761 if (range_error.Fail()) 5762 break; 5763 } 5764 5765 StreamString buffer (Stream::eBinary, 5766 addr_byte_size, 5767 byte_order); 5768 5769 mach_header_64 mach_header; 5770 if (addr_byte_size == 8) 5771 { 5772 mach_header.magic = MH_MAGIC_64; 5773 } 5774 else 5775 { 5776 mach_header.magic = MH_MAGIC; 5777 } 5778 mach_header.cputype = target_arch.GetMachOCPUType(); 5779 mach_header.cpusubtype = target_arch.GetMachOCPUSubType(); 5780 mach_header.filetype = MH_CORE; 5781 mach_header.ncmds = segment_load_commands.size(); 5782 mach_header.flags = 0; 5783 mach_header.reserved = 0; 5784 ThreadList &thread_list = process_sp->GetThreadList(); 5785 const uint32_t num_threads = thread_list.GetSize(); 5786 5787 // Make an array of LC_THREAD data items. Each one contains 5788 // the contents of the LC_THREAD load command. The data doesn't 5789 // contain the load command + load command size, we will 5790 // add the load command and load command size as we emit the data. 5791 std::vector<StreamString> LC_THREAD_datas(num_threads); 5792 for (auto &LC_THREAD_data : LC_THREAD_datas) 5793 { 5794 LC_THREAD_data.GetFlags().Set(Stream::eBinary); 5795 LC_THREAD_data.SetAddressByteSize(addr_byte_size); 5796 LC_THREAD_data.SetByteOrder(byte_order); 5797 } 5798 for (uint32_t thread_idx = 0; thread_idx < num_threads; ++thread_idx) 5799 { 5800 ThreadSP thread_sp (thread_list.GetThreadAtIndex(thread_idx)); 5801 if (thread_sp) 5802 { 5803 switch (mach_header.cputype) 5804 { 5805 case llvm::MachO::CPU_TYPE_ARM64: 5806 RegisterContextDarwin_arm64_Mach::Create_LC_THREAD (thread_sp.get(), LC_THREAD_datas[thread_idx]); 5807 break; 5808 5809 case llvm::MachO::CPU_TYPE_ARM: 5810 RegisterContextDarwin_arm_Mach::Create_LC_THREAD (thread_sp.get(), LC_THREAD_datas[thread_idx]); 5811 break; 5812 5813 case llvm::MachO::CPU_TYPE_I386: 5814 RegisterContextDarwin_i386_Mach::Create_LC_THREAD (thread_sp.get(), LC_THREAD_datas[thread_idx]); 5815 break; 5816 5817 case llvm::MachO::CPU_TYPE_X86_64: 5818 RegisterContextDarwin_x86_64_Mach::Create_LC_THREAD (thread_sp.get(), LC_THREAD_datas[thread_idx]); 5819 break; 5820 } 5821 5822 } 5823 } 5824 5825 // The size of the load command is the size of the segments... 5826 if (addr_byte_size == 8) 5827 { 5828 mach_header.sizeofcmds = segment_load_commands.size() * sizeof (struct segment_command_64); 5829 } 5830 else 5831 { 5832 mach_header.sizeofcmds = segment_load_commands.size() * sizeof (struct segment_command); 5833 } 5834 5835 // and the size of all LC_THREAD load command 5836 for (const auto &LC_THREAD_data : LC_THREAD_datas) 5837 { 5838 ++mach_header.ncmds; 5839 mach_header.sizeofcmds += 8 + LC_THREAD_data.GetSize(); 5840 } 5841 5842 printf ("mach_header: 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x\n", 5843 mach_header.magic, 5844 mach_header.cputype, 5845 mach_header.cpusubtype, 5846 mach_header.filetype, 5847 mach_header.ncmds, 5848 mach_header.sizeofcmds, 5849 mach_header.flags, 5850 mach_header.reserved); 5851 5852 // Write the mach header 5853 buffer.PutHex32(mach_header.magic); 5854 buffer.PutHex32(mach_header.cputype); 5855 buffer.PutHex32(mach_header.cpusubtype); 5856 buffer.PutHex32(mach_header.filetype); 5857 buffer.PutHex32(mach_header.ncmds); 5858 buffer.PutHex32(mach_header.sizeofcmds); 5859 buffer.PutHex32(mach_header.flags); 5860 if (addr_byte_size == 8) 5861 { 5862 buffer.PutHex32(mach_header.reserved); 5863 } 5864 5865 // Skip the mach header and all load commands and align to the next 5866 // 0x1000 byte boundary 5867 addr_t file_offset = buffer.GetSize() + mach_header.sizeofcmds; 5868 if (file_offset & 0x00000fff) 5869 { 5870 file_offset += 0x00001000ull; 5871 file_offset &= (~0x00001000ull + 1); 5872 } 5873 5874 for (auto &segment : segment_load_commands) 5875 { 5876 segment.fileoff = file_offset; 5877 file_offset += segment.filesize; 5878 } 5879 5880 // Write out all of the LC_THREAD load commands 5881 for (const auto &LC_THREAD_data : LC_THREAD_datas) 5882 { 5883 const size_t LC_THREAD_data_size = LC_THREAD_data.GetSize(); 5884 buffer.PutHex32(LC_THREAD); 5885 buffer.PutHex32(8 + LC_THREAD_data_size); // cmd + cmdsize + data 5886 buffer.Write(LC_THREAD_data.GetData(), LC_THREAD_data_size); 5887 } 5888 5889 // Write out all of the segment load commands 5890 for (const auto &segment : segment_load_commands) 5891 { 5892 printf ("0x%8.8x 0x%8.8x [0x%16.16" PRIx64 " - 0x%16.16" PRIx64 ") [0x%16.16" PRIx64 " 0x%16.16" PRIx64 ") 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x]\n", 5893 segment.cmd, 5894 segment.cmdsize, 5895 segment.vmaddr, 5896 segment.vmaddr + segment.vmsize, 5897 segment.fileoff, 5898 segment.filesize, 5899 segment.maxprot, 5900 segment.initprot, 5901 segment.nsects, 5902 segment.flags); 5903 5904 buffer.PutHex32(segment.cmd); 5905 buffer.PutHex32(segment.cmdsize); 5906 buffer.PutRawBytes(segment.segname, sizeof(segment.segname)); 5907 if (addr_byte_size == 8) 5908 { 5909 buffer.PutHex64(segment.vmaddr); 5910 buffer.PutHex64(segment.vmsize); 5911 buffer.PutHex64(segment.fileoff); 5912 buffer.PutHex64(segment.filesize); 5913 } 5914 else 5915 { 5916 buffer.PutHex32(static_cast<uint32_t>(segment.vmaddr)); 5917 buffer.PutHex32(static_cast<uint32_t>(segment.vmsize)); 5918 buffer.PutHex32(static_cast<uint32_t>(segment.fileoff)); 5919 buffer.PutHex32(static_cast<uint32_t>(segment.filesize)); 5920 } 5921 buffer.PutHex32(segment.maxprot); 5922 buffer.PutHex32(segment.initprot); 5923 buffer.PutHex32(segment.nsects); 5924 buffer.PutHex32(segment.flags); 5925 } 5926 5927 File core_file; 5928 std::string core_file_path(outfile.GetPath()); 5929 error = core_file.Open(core_file_path.c_str(), 5930 File::eOpenOptionWrite | 5931 File::eOpenOptionTruncate | 5932 File::eOpenOptionCanCreate); 5933 if (error.Success()) 5934 { 5935 // Read 1 page at a time 5936 uint8_t bytes[0x1000]; 5937 // Write the mach header and load commands out to the core file 5938 size_t bytes_written = buffer.GetString().size(); 5939 error = core_file.Write(buffer.GetString().data(), bytes_written); 5940 if (error.Success()) 5941 { 5942 // Now write the file data for all memory segments in the process 5943 for (const auto &segment : segment_load_commands) 5944 { 5945 if (core_file.SeekFromStart(segment.fileoff) == -1) 5946 { 5947 error.SetErrorStringWithFormat("unable to seek to offset 0x%" PRIx64 " in '%s'", segment.fileoff, core_file_path.c_str()); 5948 break; 5949 } 5950 5951 printf ("Saving %" PRId64 " bytes of data for memory region at 0x%" PRIx64 "\n", segment.vmsize, segment.vmaddr); 5952 addr_t bytes_left = segment.vmsize; 5953 addr_t addr = segment.vmaddr; 5954 Error memory_read_error; 5955 while (bytes_left > 0 && error.Success()) 5956 { 5957 const size_t bytes_to_read = bytes_left > sizeof(bytes) ? sizeof(bytes) : bytes_left; 5958 const size_t bytes_read = process_sp->ReadMemory(addr, bytes, bytes_to_read, memory_read_error); 5959 if (bytes_read == bytes_to_read) 5960 { 5961 size_t bytes_written = bytes_read; 5962 error = core_file.Write(bytes, bytes_written); 5963 bytes_left -= bytes_read; 5964 addr += bytes_read; 5965 } 5966 else 5967 { 5968 // Some pages within regions are not readable, those 5969 // should be zero filled 5970 memset (bytes, 0, bytes_to_read); 5971 size_t bytes_written = bytes_to_read; 5972 error = core_file.Write(bytes, bytes_written); 5973 bytes_left -= bytes_to_read; 5974 addr += bytes_to_read; 5975 } 5976 } 5977 } 5978 } 5979 } 5980 } 5981 else 5982 { 5983 error.SetErrorString("process doesn't support getting memory region info"); 5984 } 5985 } 5986 return true; // This is the right plug to handle saving core files for this process 5987 } 5988 } 5989 return false; 5990 } 5991 5992