1 //===-- StopInfo.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 "lldb/lldb-python.h" 11 12 #include "lldb/Target/StopInfo.h" 13 14 // C Includes 15 // C++ Includes 16 #include <string> 17 18 // Other libraries and framework includes 19 // Project includes 20 #include "lldb/Core/Log.h" 21 #include "lldb/Breakpoint/Breakpoint.h" 22 #include "lldb/Breakpoint/BreakpointLocation.h" 23 #include "lldb/Breakpoint/StoppointCallbackContext.h" 24 #include "lldb/Breakpoint/Watchpoint.h" 25 #include "lldb/Core/Debugger.h" 26 #include "lldb/Core/StreamString.h" 27 #include "lldb/Expression/ClangUserExpression.h" 28 #include "lldb/Target/Target.h" 29 #include "lldb/Target/Thread.h" 30 #include "lldb/Target/ThreadPlan.h" 31 #include "lldb/Target/Process.h" 32 #include "lldb/Target/UnixSignals.h" 33 34 using namespace lldb; 35 using namespace lldb_private; 36 37 StopInfo::StopInfo (Thread &thread, uint64_t value) : 38 m_thread (thread), 39 m_stop_id (thread.GetProcess()->GetStopID()), 40 m_resume_id (thread.GetProcess()->GetResumeID()), 41 m_value (value) 42 { 43 } 44 45 bool 46 StopInfo::IsValid () const 47 { 48 return m_thread.GetProcess()->GetStopID() == m_stop_id; 49 } 50 51 void 52 StopInfo::MakeStopInfoValid () 53 { 54 m_stop_id = m_thread.GetProcess()->GetStopID(); 55 m_resume_id = m_thread.GetProcess()->GetResumeID(); 56 } 57 58 bool 59 StopInfo::HasTargetRunSinceMe () 60 { 61 lldb::StateType ret_type = m_thread.GetProcess()->GetPrivateState(); 62 if (ret_type == eStateRunning) 63 { 64 return true; 65 } 66 else if (ret_type == eStateStopped) 67 { 68 // This is a little tricky. We want to count "run and stopped again before you could 69 // ask this question as a "TRUE" answer to HasTargetRunSinceMe. But we don't want to 70 // include any running of the target done for expressions. So we track both resumes, 71 // and resumes caused by expressions, and check if there are any resumes NOT caused 72 // by expressions. 73 74 uint32_t curr_resume_id = m_thread.GetProcess()->GetResumeID(); 75 uint32_t last_user_expression_id = m_thread.GetProcess()->GetLastUserExpressionResumeID (); 76 if (curr_resume_id == m_resume_id) 77 { 78 return false; 79 } 80 else if (curr_resume_id > last_user_expression_id) 81 { 82 return true; 83 } 84 } 85 return false; 86 } 87 88 //---------------------------------------------------------------------- 89 // StopInfoBreakpoint 90 //---------------------------------------------------------------------- 91 92 namespace lldb_private 93 { 94 class StopInfoBreakpoint : public StopInfo 95 { 96 public: 97 98 StopInfoBreakpoint (Thread &thread, break_id_t break_id) : 99 StopInfo (thread, break_id), 100 m_description(), 101 m_should_stop (false), 102 m_should_stop_is_valid (false), 103 m_should_perform_action (true), 104 m_address (LLDB_INVALID_ADDRESS), 105 m_break_id(LLDB_INVALID_BREAK_ID), 106 m_was_one_shot (false) 107 { 108 StoreBPInfo(); 109 } 110 111 StopInfoBreakpoint (Thread &thread, break_id_t break_id, bool should_stop) : 112 StopInfo (thread, break_id), 113 m_description(), 114 m_should_stop (should_stop), 115 m_should_stop_is_valid (true), 116 m_should_perform_action (true), 117 m_address (LLDB_INVALID_ADDRESS), 118 m_break_id(LLDB_INVALID_BREAK_ID), 119 m_was_one_shot (false) 120 { 121 StoreBPInfo(); 122 } 123 124 void StoreBPInfo () 125 { 126 BreakpointSiteSP bp_site_sp (m_thread.GetProcess()->GetBreakpointSiteList().FindByID (m_value)); 127 if (bp_site_sp) 128 { 129 if (bp_site_sp->GetNumberOfOwners() == 1) 130 { 131 BreakpointLocationSP bp_loc_sp = bp_site_sp->GetOwnerAtIndex(0); 132 if (bp_loc_sp) 133 { 134 m_break_id = bp_loc_sp->GetBreakpoint().GetID(); 135 m_was_one_shot = bp_loc_sp->GetBreakpoint().IsOneShot(); 136 } 137 } 138 m_address = bp_site_sp->GetLoadAddress(); 139 } 140 } 141 142 virtual ~StopInfoBreakpoint () 143 { 144 } 145 146 virtual StopReason 147 GetStopReason () const 148 { 149 return eStopReasonBreakpoint; 150 } 151 152 virtual bool 153 ShouldStopSynchronous (Event *event_ptr) 154 { 155 if (!m_should_stop_is_valid) 156 { 157 // Only check once if we should stop at a breakpoint 158 BreakpointSiteSP bp_site_sp (m_thread.GetProcess()->GetBreakpointSiteList().FindByID (m_value)); 159 if (bp_site_sp) 160 { 161 ExecutionContext exe_ctx (m_thread.GetStackFrameAtIndex(0)); 162 StoppointCallbackContext context (event_ptr, exe_ctx, true); 163 m_should_stop = bp_site_sp->ShouldStop (&context); 164 } 165 else 166 { 167 LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 168 169 if (log) 170 log->Printf ("Process::%s could not find breakpoint site id: %" PRId64 "...", __FUNCTION__, m_value); 171 172 m_should_stop = true; 173 } 174 m_should_stop_is_valid = true; 175 } 176 return m_should_stop; 177 } 178 179 virtual bool 180 ShouldNotify (Event *event_ptr) 181 { 182 BreakpointSiteSP bp_site_sp (m_thread.GetProcess()->GetBreakpointSiteList().FindByID (m_value)); 183 if (bp_site_sp) 184 { 185 bool all_internal = true; 186 187 for (uint32_t i = 0; i < bp_site_sp->GetNumberOfOwners(); i++) 188 { 189 if (!bp_site_sp->GetOwnerAtIndex(i)->GetBreakpoint().IsInternal()) 190 { 191 all_internal = false; 192 break; 193 } 194 } 195 return all_internal == false; 196 } 197 return true; 198 } 199 200 virtual const char * 201 GetDescription () 202 { 203 if (m_description.empty()) 204 { 205 BreakpointSiteSP bp_site_sp (m_thread.GetProcess()->GetBreakpointSiteList().FindByID (m_value)); 206 if (bp_site_sp) 207 { 208 StreamString strm; 209 strm.Printf("breakpoint "); 210 bp_site_sp->GetDescription(&strm, eDescriptionLevelBrief); 211 m_description.swap (strm.GetString()); 212 } 213 else 214 { 215 StreamString strm; 216 if (m_break_id != LLDB_INVALID_BREAK_ID) 217 { 218 if (m_was_one_shot) 219 strm.Printf ("one-shot breakpoint %d", m_break_id); 220 else 221 strm.Printf ("breakpoint %d which has been deleted.", m_break_id); 222 } 223 else if (m_address == LLDB_INVALID_ADDRESS) 224 strm.Printf("breakpoint site %" PRIi64 " which has been deleted - unknown address", m_value); 225 else 226 strm.Printf("breakpoint site %" PRIi64 " which has been deleted - was at 0x%" PRIx64, m_value, m_address); 227 228 m_description.swap (strm.GetString()); 229 } 230 } 231 return m_description.c_str(); 232 } 233 234 protected: 235 bool 236 ShouldStop (Event *event_ptr) 237 { 238 // This just reports the work done by PerformAction or the synchronous stop. It should 239 // only ever get called after they have had a chance to run. 240 assert (m_should_stop_is_valid); 241 return m_should_stop; 242 } 243 244 virtual void 245 PerformAction (Event *event_ptr) 246 { 247 if (!m_should_perform_action) 248 return; 249 m_should_perform_action = false; 250 251 LogSP log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_BREAKPOINTS); 252 253 BreakpointSiteSP bp_site_sp (m_thread.GetProcess()->GetBreakpointSiteList().FindByID (m_value)); 254 255 if (bp_site_sp) 256 { 257 size_t num_owners = bp_site_sp->GetNumberOfOwners(); 258 259 if (num_owners == 0) 260 { 261 m_should_stop = true; 262 } 263 else 264 { 265 // We go through each location, and test first its condition. If the condition says to stop, 266 // then we run the callback for that location. If that callback says to stop as well, then 267 // we set m_should_stop to true; we are going to stop. 268 // But we still want to give all the breakpoints whose conditions say we are going to stop a 269 // chance to run their callbacks. 270 // Of course if any callback restarts the target by putting "continue" in the callback, then 271 // we're going to restart, without running the rest of the callbacks. And in this case we will 272 // end up not stopping even if another location said we should stop. But that's better than not 273 // running all the callbacks. 274 275 m_should_stop = false; 276 277 ExecutionContext exe_ctx (m_thread.GetStackFrameAtIndex(0)); 278 StoppointCallbackContext context (event_ptr, exe_ctx, false); 279 280 for (size_t j = 0; j < num_owners; j++) 281 { 282 lldb::BreakpointLocationSP bp_loc_sp = bp_site_sp->GetOwnerAtIndex(j); 283 284 // First run the condition for the breakpoint. If that says we should stop, then we'll run 285 // the callback for the breakpoint. If the callback says we shouldn't stop that will win. 286 287 bool condition_says_stop = true; 288 if (bp_loc_sp->GetConditionText() != NULL) 289 { 290 // We need to make sure the user sees any parse errors in their condition, so we'll hook the 291 // constructor errors up to the debugger's Async I/O. 292 293 ValueObjectSP result_valobj_sp; 294 295 ExecutionResults result_code; 296 ValueObjectSP result_value_sp; 297 const bool discard_on_error = true; 298 Error error; 299 result_code = ClangUserExpression::EvaluateWithError (exe_ctx, 300 eExecutionPolicyOnlyWhenNeeded, 301 lldb::eLanguageTypeUnknown, 302 ClangUserExpression::eResultTypeAny, 303 discard_on_error, 304 bp_loc_sp->GetConditionText(), 305 NULL, 306 result_value_sp, 307 error, 308 true, 309 ClangUserExpression::kDefaultTimeout); 310 if (result_code == eExecutionCompleted) 311 { 312 if (result_value_sp) 313 { 314 Scalar scalar_value; 315 if (result_value_sp->ResolveValue (scalar_value)) 316 { 317 if (scalar_value.ULongLong(1) == 0) 318 condition_says_stop = false; 319 else 320 condition_says_stop = true; 321 if (log) 322 log->Printf("Condition successfully evaluated, result is %s.\n", 323 m_should_stop ? "true" : "false"); 324 } 325 else 326 { 327 condition_says_stop = true; 328 if (log) 329 log->Printf("Failed to get an integer result from the expression."); 330 } 331 } 332 } 333 else 334 { 335 Debugger &debugger = exe_ctx.GetTargetRef().GetDebugger(); 336 StreamSP error_sp = debugger.GetAsyncErrorStream (); 337 error_sp->Printf ("Stopped due to an error evaluating condition of breakpoint "); 338 bp_loc_sp->GetDescription (error_sp.get(), eDescriptionLevelBrief); 339 error_sp->Printf (": \"%s\"", 340 bp_loc_sp->GetConditionText()); 341 error_sp->EOL(); 342 const char *err_str = error.AsCString("<Unknown Error>"); 343 if (log) 344 log->Printf("Error evaluating condition: \"%s\"\n", err_str); 345 346 error_sp->PutCString (err_str); 347 error_sp->EOL(); 348 error_sp->Flush(); 349 // If the condition fails to be parsed or run, we should stop. 350 condition_says_stop = true; 351 } 352 } 353 354 // If this location's condition says we should aren't going to stop, 355 // then don't run the callback for this location. 356 if (!condition_says_stop) 357 continue; 358 359 bool callback_says_stop; 360 361 // FIXME: For now the callbacks have to run in async mode - the first time we restart we need 362 // to get out of there. So set it here. 363 // When we figure out how to nest breakpoint hits then this will change. 364 365 Debugger &debugger = m_thread.CalculateTarget()->GetDebugger(); 366 bool old_async = debugger.GetAsyncExecution(); 367 debugger.SetAsyncExecution (true); 368 369 callback_says_stop = bp_loc_sp->InvokeCallback (&context); 370 371 debugger.SetAsyncExecution (old_async); 372 373 if (callback_says_stop) 374 m_should_stop = true; 375 376 // If we are going to stop for this breakpoint, then remove the breakpoint. 377 if (callback_says_stop && bp_loc_sp && bp_loc_sp->GetBreakpoint().IsOneShot()) 378 { 379 m_thread.GetProcess()->GetTarget().RemoveBreakpointByID (bp_loc_sp->GetBreakpoint().GetID()); 380 } 381 382 // Also make sure that the callback hasn't continued the target. 383 // If it did, when we'll set m_should_start to false and get out of here. 384 if (HasTargetRunSinceMe ()) 385 { 386 m_should_stop = false; 387 break; 388 } 389 } 390 } 391 // We've figured out what this stop wants to do, so mark it as valid so we don't compute it again. 392 m_should_stop_is_valid = true; 393 394 } 395 else 396 { 397 m_should_stop = true; 398 m_should_stop_is_valid = true; 399 LogSP log_process(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 400 401 if (log_process) 402 log_process->Printf ("Process::%s could not find breakpoint site id: %" PRId64 "...", __FUNCTION__, m_value); 403 } 404 if (log) 405 log->Printf ("Process::%s returning from action with m_should_stop: %d.", __FUNCTION__, m_should_stop); 406 } 407 408 private: 409 std::string m_description; 410 bool m_should_stop; 411 bool m_should_stop_is_valid; 412 bool m_should_perform_action; // Since we are trying to preserve the "state" of the system even if we run functions 413 // etc. behind the users backs, we need to make sure we only REALLY perform the action once. 414 lldb::addr_t m_address; // We use this to capture the breakpoint site address when we create the StopInfo, 415 // in case somebody deletes it between the time the StopInfo is made and the 416 // description is asked for. 417 lldb::break_id_t m_break_id; 418 bool m_was_one_shot; 419 }; 420 421 422 //---------------------------------------------------------------------- 423 // StopInfoWatchpoint 424 //---------------------------------------------------------------------- 425 426 class StopInfoWatchpoint : public StopInfo 427 { 428 public: 429 // Make sure watchpoint is properly disabled and subsequently enabled while performing watchpoint actions. 430 class WatchpointSentry { 431 public: 432 WatchpointSentry(Process *p, Watchpoint *w): 433 process(p), 434 watchpoint(w) 435 { 436 if (process && watchpoint) 437 { 438 watchpoint->TurnOnEphemeralMode(); 439 process->DisableWatchpoint(watchpoint); 440 } 441 } 442 ~WatchpointSentry() 443 { 444 if (process && watchpoint) 445 { 446 if (!watchpoint->IsDisabledDuringEphemeralMode()) 447 process->EnableWatchpoint(watchpoint); 448 watchpoint->TurnOffEphemeralMode(); 449 } 450 } 451 private: 452 Process *process; 453 Watchpoint *watchpoint; 454 }; 455 456 StopInfoWatchpoint (Thread &thread, break_id_t watch_id) : 457 StopInfo(thread, watch_id), 458 m_description(), 459 m_should_stop(false), 460 m_should_stop_is_valid(false) 461 { 462 } 463 464 virtual ~StopInfoWatchpoint () 465 { 466 } 467 468 virtual StopReason 469 GetStopReason () const 470 { 471 return eStopReasonWatchpoint; 472 } 473 474 virtual const char * 475 GetDescription () 476 { 477 if (m_description.empty()) 478 { 479 StreamString strm; 480 strm.Printf("watchpoint %" PRIi64, m_value); 481 m_description.swap (strm.GetString()); 482 } 483 return m_description.c_str(); 484 } 485 486 protected: 487 virtual bool 488 ShouldStop (Event *event_ptr) 489 { 490 // ShouldStop() method is idempotent and should not affect hit count. 491 // See Process::RunPrivateStateThread()->Process()->HandlePrivateEvent() 492 // -->Process()::ShouldBroadcastEvent()->ThreadList::ShouldStop()-> 493 // Thread::ShouldStop()->ThreadPlanBase::ShouldStop()-> 494 // StopInfoWatchpoint::ShouldStop() and 495 // Event::DoOnRemoval()->Process::ProcessEventData::DoOnRemoval()-> 496 // StopInfoWatchpoint::PerformAction(). 497 if (m_should_stop_is_valid) 498 return m_should_stop; 499 500 WatchpointSP wp_sp = 501 m_thread.CalculateTarget()->GetWatchpointList().FindByID(GetValue()); 502 if (wp_sp) 503 { 504 // Check if we should stop at a watchpoint. 505 ExecutionContext exe_ctx (m_thread.GetStackFrameAtIndex(0)); 506 StoppointCallbackContext context (event_ptr, exe_ctx, true); 507 m_should_stop = wp_sp->ShouldStop (&context); 508 } 509 else 510 { 511 LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 512 513 if (log) 514 log->Printf ("Process::%s could not find watchpoint location id: %" PRId64 "...", 515 __FUNCTION__, GetValue()); 516 517 m_should_stop = true; 518 } 519 m_should_stop_is_valid = true; 520 return m_should_stop; 521 } 522 523 virtual void 524 PerformAction (Event *event_ptr) 525 { 526 LogSP log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_WATCHPOINTS); 527 // We're going to calculate if we should stop or not in some way during the course of 528 // this code. Also by default we're going to stop, so set that here. 529 m_should_stop = true; 530 531 WatchpointSP wp_sp = 532 m_thread.CalculateTarget()->GetWatchpointList().FindByID(GetValue()); 533 if (wp_sp) 534 { 535 ExecutionContext exe_ctx (m_thread.GetStackFrameAtIndex(0)); 536 Process* process = exe_ctx.GetProcessPtr(); 537 538 // This sentry object makes sure the current watchpoint is disabled while performing watchpoint actions, 539 // and it is then enabled after we are finished. 540 WatchpointSentry sentry(process, wp_sp.get()); 541 542 { 543 // check if this process is running on an architecture where watchpoints trigger 544 // before the associated instruction runs. if so, disable the WP, single-step and then 545 // re-enable the watchpoint 546 if (process) 547 { 548 uint32_t num; bool wp_triggers_after; 549 if (process->GetWatchpointSupportInfo(num, wp_triggers_after).Success()) 550 { 551 if (!wp_triggers_after) 552 { 553 ThreadPlan *new_plan = m_thread.QueueThreadPlanForStepSingleInstruction(false, // step-over 554 false, // abort_other_plans 555 true); // stop_other_threads 556 new_plan->SetIsMasterPlan (true); 557 new_plan->SetOkayToDiscard (false); 558 process->GetThreadList().SetSelectedThreadByID (m_thread.GetID()); 559 process->Resume (); 560 process->WaitForProcessToStop (NULL); 561 process->GetThreadList().SetSelectedThreadByID (m_thread.GetID()); 562 MakeStopInfoValid(); // make sure we do not fail to stop because of the single-step taken above 563 } 564 } 565 } 566 } 567 568 if (m_should_stop && wp_sp->GetConditionText() != NULL) 569 { 570 // We need to make sure the user sees any parse errors in their condition, so we'll hook the 571 // constructor errors up to the debugger's Async I/O. 572 ExecutionResults result_code; 573 ValueObjectSP result_value_sp; 574 const bool discard_on_error = true; 575 Error error; 576 result_code = ClangUserExpression::EvaluateWithError (exe_ctx, 577 eExecutionPolicyOnlyWhenNeeded, 578 lldb::eLanguageTypeUnknown, 579 ClangUserExpression::eResultTypeAny, 580 discard_on_error, 581 wp_sp->GetConditionText(), 582 NULL, 583 result_value_sp, 584 error, 585 true, 586 ClangUserExpression::kDefaultTimeout); 587 if (result_code == eExecutionCompleted) 588 { 589 if (result_value_sp) 590 { 591 Scalar scalar_value; 592 if (result_value_sp->ResolveValue (scalar_value)) 593 { 594 if (scalar_value.ULongLong(1) == 0) 595 { 596 // We have been vetoed. This takes precedence over querying 597 // the watchpoint whether it should stop (aka ignore count and 598 // friends). See also StopInfoWatchpoint::ShouldStop() as well 599 // as Process::ProcessEventData::DoOnRemoval(). 600 m_should_stop = false; 601 } 602 else 603 m_should_stop = true; 604 if (log) 605 log->Printf("Condition successfully evaluated, result is %s.\n", 606 m_should_stop ? "true" : "false"); 607 } 608 else 609 { 610 m_should_stop = true; 611 if (log) 612 log->Printf("Failed to get an integer result from the expression."); 613 } 614 } 615 } 616 else 617 { 618 Debugger &debugger = exe_ctx.GetTargetRef().GetDebugger(); 619 StreamSP error_sp = debugger.GetAsyncErrorStream (); 620 error_sp->Printf ("Stopped due to an error evaluating condition of watchpoint "); 621 wp_sp->GetDescription (error_sp.get(), eDescriptionLevelBrief); 622 error_sp->Printf (": \"%s\"", 623 wp_sp->GetConditionText()); 624 error_sp->EOL(); 625 const char *err_str = error.AsCString("<Unknown Error>"); 626 if (log) 627 log->Printf("Error evaluating condition: \"%s\"\n", err_str); 628 629 error_sp->PutCString (err_str); 630 error_sp->EOL(); 631 error_sp->Flush(); 632 // If the condition fails to be parsed or run, we should stop. 633 m_should_stop = true; 634 } 635 } 636 637 // If the condition says to stop, we run the callback to further decide whether to stop. 638 if (m_should_stop) 639 { 640 StoppointCallbackContext context (event_ptr, exe_ctx, false); 641 bool stop_requested = wp_sp->InvokeCallback (&context); 642 // Also make sure that the callback hasn't continued the target. 643 // If it did, when we'll set m_should_stop to false and get out of here. 644 if (HasTargetRunSinceMe ()) 645 m_should_stop = false; 646 647 if (m_should_stop && !stop_requested) 648 { 649 // We have been vetoed by the callback mechanism. 650 m_should_stop = false; 651 } 652 } 653 // Finally, if we are going to stop, print out the new & old values: 654 if (m_should_stop) 655 { 656 wp_sp->CaptureWatchedValue(exe_ctx); 657 658 Debugger &debugger = exe_ctx.GetTargetRef().GetDebugger(); 659 StreamSP output_sp = debugger.GetAsyncOutputStream (); 660 wp_sp->DumpSnapshots(output_sp.get()); 661 output_sp->EOL(); 662 output_sp->Flush(); 663 } 664 665 } 666 else 667 { 668 LogSP log_process(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 669 670 if (log_process) 671 log_process->Printf ("Process::%s could not find watchpoint id: %" PRId64 "...", __FUNCTION__, m_value); 672 } 673 if (log) 674 log->Printf ("Process::%s returning from action with m_should_stop: %d.", __FUNCTION__, m_should_stop); 675 676 } 677 678 private: 679 std::string m_description; 680 bool m_should_stop; 681 bool m_should_stop_is_valid; 682 }; 683 684 685 686 //---------------------------------------------------------------------- 687 // StopInfoUnixSignal 688 //---------------------------------------------------------------------- 689 690 class StopInfoUnixSignal : public StopInfo 691 { 692 public: 693 694 StopInfoUnixSignal (Thread &thread, int signo) : 695 StopInfo (thread, signo) 696 { 697 } 698 699 virtual ~StopInfoUnixSignal () 700 { 701 } 702 703 704 virtual StopReason 705 GetStopReason () const 706 { 707 return eStopReasonSignal; 708 } 709 710 virtual bool 711 ShouldStop (Event *event_ptr) 712 { 713 return m_thread.GetProcess()->GetUnixSignals().GetShouldStop (m_value); 714 } 715 716 717 // If should stop returns false, check if we should notify of this event 718 virtual bool 719 ShouldNotify (Event *event_ptr) 720 { 721 return m_thread.GetProcess()->GetUnixSignals().GetShouldNotify (m_value); 722 } 723 724 725 virtual void 726 WillResume (lldb::StateType resume_state) 727 { 728 if (m_thread.GetProcess()->GetUnixSignals().GetShouldSuppress(m_value) == false) 729 m_thread.SetResumeSignal(m_value); 730 } 731 732 virtual const char * 733 GetDescription () 734 { 735 if (m_description.empty()) 736 { 737 StreamString strm; 738 const char *signal_name = m_thread.GetProcess()->GetUnixSignals().GetSignalAsCString (m_value); 739 if (signal_name) 740 strm.Printf("signal %s", signal_name); 741 else 742 strm.Printf("signal %" PRIi64, m_value); 743 m_description.swap (strm.GetString()); 744 } 745 return m_description.c_str(); 746 } 747 }; 748 749 //---------------------------------------------------------------------- 750 // StopInfoTrace 751 //---------------------------------------------------------------------- 752 753 class StopInfoTrace : public StopInfo 754 { 755 public: 756 757 StopInfoTrace (Thread &thread) : 758 StopInfo (thread, LLDB_INVALID_UID) 759 { 760 } 761 762 virtual ~StopInfoTrace () 763 { 764 } 765 766 virtual StopReason 767 GetStopReason () const 768 { 769 return eStopReasonTrace; 770 } 771 772 virtual const char * 773 GetDescription () 774 { 775 if (m_description.empty()) 776 return "trace"; 777 else 778 return m_description.c_str(); 779 } 780 }; 781 782 783 //---------------------------------------------------------------------- 784 // StopInfoException 785 //---------------------------------------------------------------------- 786 787 class StopInfoException : public StopInfo 788 { 789 public: 790 791 StopInfoException (Thread &thread, const char *description) : 792 StopInfo (thread, LLDB_INVALID_UID) 793 { 794 if (description) 795 SetDescription (description); 796 } 797 798 virtual 799 ~StopInfoException () 800 { 801 } 802 803 virtual StopReason 804 GetStopReason () const 805 { 806 return eStopReasonException; 807 } 808 809 virtual const char * 810 GetDescription () 811 { 812 if (m_description.empty()) 813 return "exception"; 814 else 815 return m_description.c_str(); 816 } 817 }; 818 819 820 //---------------------------------------------------------------------- 821 // StopInfoThreadPlan 822 //---------------------------------------------------------------------- 823 824 class StopInfoThreadPlan : public StopInfo 825 { 826 public: 827 828 StopInfoThreadPlan (ThreadPlanSP &plan_sp, ValueObjectSP &return_valobj_sp) : 829 StopInfo (plan_sp->GetThread(), LLDB_INVALID_UID), 830 m_plan_sp (plan_sp), 831 m_return_valobj_sp (return_valobj_sp) 832 { 833 } 834 835 virtual ~StopInfoThreadPlan () 836 { 837 } 838 839 virtual StopReason 840 GetStopReason () const 841 { 842 return eStopReasonPlanComplete; 843 } 844 845 virtual const char * 846 GetDescription () 847 { 848 if (m_description.empty()) 849 { 850 StreamString strm; 851 m_plan_sp->GetDescription (&strm, eDescriptionLevelBrief); 852 m_description.swap (strm.GetString()); 853 } 854 return m_description.c_str(); 855 } 856 857 ValueObjectSP 858 GetReturnValueObject() 859 { 860 return m_return_valobj_sp; 861 } 862 863 private: 864 ThreadPlanSP m_plan_sp; 865 ValueObjectSP m_return_valobj_sp; 866 }; 867 868 class StopInfoExec : public StopInfo 869 { 870 public: 871 872 StopInfoExec (Thread &thread) : 873 StopInfo (thread, LLDB_INVALID_UID), 874 m_performed_action (false) 875 { 876 } 877 878 virtual 879 ~StopInfoExec () 880 { 881 } 882 883 virtual StopReason 884 GetStopReason () const 885 { 886 return eStopReasonExec; 887 } 888 889 virtual const char * 890 GetDescription () 891 { 892 return "exec"; 893 } 894 protected: 895 protected: 896 897 virtual void 898 PerformAction (Event *event_ptr) 899 { 900 // Only perform the action once 901 if (m_performed_action) 902 return; 903 m_performed_action = true; 904 m_thread.GetProcess()->DidExec(); 905 } 906 907 bool m_performed_action; 908 }; 909 910 } // namespace lldb_private 911 912 StopInfoSP 913 StopInfo::CreateStopReasonWithBreakpointSiteID (Thread &thread, break_id_t break_id) 914 { 915 return StopInfoSP (new StopInfoBreakpoint (thread, break_id)); 916 } 917 918 StopInfoSP 919 StopInfo::CreateStopReasonWithBreakpointSiteID (Thread &thread, break_id_t break_id, bool should_stop) 920 { 921 return StopInfoSP (new StopInfoBreakpoint (thread, break_id, should_stop)); 922 } 923 924 StopInfoSP 925 StopInfo::CreateStopReasonWithWatchpointID (Thread &thread, break_id_t watch_id) 926 { 927 return StopInfoSP (new StopInfoWatchpoint (thread, watch_id)); 928 } 929 930 StopInfoSP 931 StopInfo::CreateStopReasonWithSignal (Thread &thread, int signo) 932 { 933 return StopInfoSP (new StopInfoUnixSignal (thread, signo)); 934 } 935 936 StopInfoSP 937 StopInfo::CreateStopReasonToTrace (Thread &thread) 938 { 939 return StopInfoSP (new StopInfoTrace (thread)); 940 } 941 942 StopInfoSP 943 StopInfo::CreateStopReasonWithPlan (ThreadPlanSP &plan_sp, ValueObjectSP return_valobj_sp) 944 { 945 return StopInfoSP (new StopInfoThreadPlan (plan_sp, return_valobj_sp)); 946 } 947 948 StopInfoSP 949 StopInfo::CreateStopReasonWithException (Thread &thread, const char *description) 950 { 951 return StopInfoSP (new StopInfoException (thread, description)); 952 } 953 954 StopInfoSP 955 StopInfo::CreateStopReasonWithExec (Thread &thread) 956 { 957 return StopInfoSP (new StopInfoExec (thread)); 958 } 959 960 ValueObjectSP 961 StopInfo::GetReturnValueObject(StopInfoSP &stop_info_sp) 962 { 963 if (stop_info_sp && stop_info_sp->GetStopReason() == eStopReasonPlanComplete) 964 { 965 StopInfoThreadPlan *plan_stop_info = static_cast<StopInfoThreadPlan *>(stop_info_sp.get()); 966 return plan_stop_info->GetReturnValueObject(); 967 } 968 else 969 return ValueObjectSP(); 970 } 971