1#!/usr/bin/python 2 3#---------------------------------------------------------------------- 4# Be sure to add the python path that points to the LLDB shared library. 5# 6# To use this in the embedded python interpreter using "lldb": 7# 8# cd /path/containing/crashlog.py 9# lldb 10# (lldb) script import crashlog 11# "crashlog" command installed, type "crashlog --help" for detailed help 12# (lldb) crashlog ~/Library/Logs/DiagnosticReports/a.crash 13# 14# The benefit of running the crashlog command inside lldb in the 15# embedded python interpreter is when the command completes, there 16# will be a target with all of the files loaded at the locations 17# described in the crash log. Only the files that have stack frames 18# in the backtrace will be loaded unless the "--load-all" option 19# has been specified. This allows users to explore the program in the 20# state it was in right at crash time. 21# 22# On MacOSX csh, tcsh: 23# ( setenv PYTHONPATH /path/to/LLDB.framework/Resources/Python ; ./crashlog.py ~/Library/Logs/DiagnosticReports/a.crash ) 24# 25# On MacOSX sh, bash: 26# PYTHONPATH=/path/to/LLDB.framework/Resources/Python ./crashlog.py ~/Library/Logs/DiagnosticReports/a.crash 27#---------------------------------------------------------------------- 28 29import lldb 30import commands 31import optparse 32import os 33import plistlib 34import re 35import shlex 36import sys 37import time 38import uuid 39 40class Address: 41 """Class that represents an address that will be symbolicated""" 42 def __init__(self, target, load_addr): 43 self.target = target 44 self.load_addr = load_addr # The load address that this object represents 45 self.so_addr = None # the resolved lldb.SBAddress (if any), named so_addr for section/offset address 46 self.sym_ctx = None # The cached symbol context for this address 47 self.description = None # Any original textual description of this address to be used as a backup in case symbolication fails 48 self.symbolication = None # The cached symbolicated string that describes this address 49 self.inlined = False 50 def __str__(self): 51 s = "%#16.16x" % (self.load_addr) 52 if self.symbolication: 53 s += " %s" % (self.symbolication) 54 elif self.description: 55 s += " %s" % (self.description) 56 elif self.so_addr: 57 s += " %s" % (self.so_addr) 58 return s 59 60 def resolve_addr(self): 61 if self.so_addr == None: 62 self.so_addr = self.target.ResolveLoadAddress (self.load_addr) 63 return self.so_addr 64 65 def is_inlined(self): 66 return self.inlined 67 68 def get_symbol_context(self): 69 if self.sym_ctx == None: 70 sb_addr = self.resolve_addr() 71 if sb_addr: 72 self.sym_ctx = self.target.ResolveSymbolContextForAddress (sb_addr, lldb.eSymbolContextEverything) 73 else: 74 self.sym_ctx = lldb.SBSymbolContext() 75 return self.sym_ctx 76 77 def get_instructions(self): 78 sym_ctx = self.get_symbol_context() 79 if sym_ctx: 80 function = sym_ctx.GetFunction() 81 if function: 82 return function.GetInstructions(self.target) 83 return sym_ctx.GetSymbol().GetInstructions(self.target) 84 return None 85 86 def symbolicate(self, verbose = False): 87 if self.symbolication == None: 88 self.symbolication = '' 89 self.inlined = False 90 sym_ctx = self.get_symbol_context() 91 if sym_ctx: 92 module = sym_ctx.GetModule() 93 if module: 94 # Print full source file path in verbose mode 95 if verbose: 96 self.symbolication += str(module.GetFileSpec()) + '`' 97 else: 98 self.symbolication += module.GetFileSpec().GetFilename() + '`' 99 function_start_load_addr = -1 100 function = sym_ctx.GetFunction() 101 block = sym_ctx.GetBlock() 102 line_entry = sym_ctx.GetLineEntry() 103 symbol = sym_ctx.GetSymbol() 104 inlined_block = block.GetContainingInlinedBlock(); 105 if function: 106 self.symbolication += function.GetName() 107 108 if inlined_block: 109 self.inlined = True 110 self.symbolication += ' [inlined] ' + inlined_block.GetInlinedName(); 111 block_range_idx = inlined_block.GetRangeIndexForBlockAddress (self.so_addr) 112 if block_range_idx < lldb.UINT32_MAX: 113 block_range_start_addr = inlined_block.GetRangeStartAddress (block_range_idx) 114 function_start_load_addr = block_range_start_addr.GetLoadAddress (self.target) 115 if function_start_load_addr == -1: 116 function_start_load_addr = function.GetStartAddress().GetLoadAddress (self.target) 117 elif symbol: 118 self.symbolication += symbol.GetName() 119 function_start_load_addr = symbol.GetStartAddress().GetLoadAddress (self.target) 120 else: 121 self.symbolication = '' 122 return False 123 124 # Dump the offset from the current function or symbol if it is non zero 125 function_offset = self.load_addr - function_start_load_addr 126 if function_offset > 0: 127 self.symbolication += " + %u" % (function_offset) 128 elif function_offset < 0: 129 self.symbolication += " %i (invalid negative offset, file a bug) " % function_offset 130 131 # Print out any line information if any is available 132 if line_entry.GetFileSpec(): 133 # Print full source file path in verbose mode 134 if verbose: 135 self.symbolication += ' at %s' % line_entry.GetFileSpec() 136 else: 137 self.symbolication += ' at %s' % line_entry.GetFileSpec().GetFilename() 138 self.symbolication += ':%u' % line_entry.GetLine () 139 column = line_entry.GetColumn() 140 if column > 0: 141 self.symbolication += ':%u' % column 142 return True 143 return False 144 145class Section: 146 """Class that represents an load address range""" 147 sect_info_regex = re.compile('(?P<name>[^=]+)=(?P<range>.*)') 148 addr_regex = re.compile('^\s*(?P<start>0x[0-9A-Fa-f]+)\s*$') 149 range_regex = re.compile('^\s*(?P<start>0x[0-9A-Fa-f]+)\s*(?P<op>[-+])\s*(?P<end>0x[0-9A-Fa-f]+)\s*$') 150 151 def __init__(self, start_addr = None, end_addr = None, name = None): 152 self.start_addr = start_addr 153 self.end_addr = end_addr 154 self.name = name 155 156 def contains(self, addr): 157 return self.start_addr <= addr and addr < self.end_addr; 158 159 def set_from_string(self, s): 160 match = self.sect_info_regex.match (s) 161 if match: 162 self.name = match.group('name') 163 range_str = match.group('range') 164 addr_match = self.addr_regex.match(range_str) 165 if addr_match: 166 self.start_addr = int(addr_match.group('start'), 16) 167 self.end_addr = None 168 return True 169 170 range_match = self.range_regex.match(range_str) 171 if range_match: 172 self.start_addr = int(range_match.group('start'), 16) 173 self.end_addr = int(range_match.group('end'), 16) 174 op = range_match.group('op') 175 if op == '+': 176 self.end_addr += self.start_addr 177 return True 178 print 'error: invalid section info string "%s"' % s 179 print 'Valid section info formats are:' 180 print 'Format Example Description' 181 print '--------------------- -----------------------------------------------' 182 print '<name>=<base> __TEXT=0x123000 Section from base address only' 183 print '<name>=<base>-<end> __TEXT=0x123000-0x124000 Section from base address and end address' 184 print '<name>=<base>+<size> __TEXT=0x123000+0x1000 Section from base address and size' 185 return False 186 187 def __str__(self): 188 if self.name: 189 if self.end_addr != None: 190 if self.start_addr != None: 191 return "%s=[0x%16.16x - 0x%16.16x)" % (self.name, self.start_addr, self.end_addr) 192 else: 193 if self.start_addr != None: 194 return "%s=0x%16.16x" % (self.name, self.start_addr) 195 return self.name 196 return "<invalid>" 197 198class Image: 199 """A class that represents an executable image and any associated data""" 200 201 def __init__(self, path, uuid = None): 202 self.path = path 203 self.resolved_path = None 204 self.resolved = False 205 self.unavailable = False 206 self.uuid = uuid 207 self.section_infos = list() 208 self.identifier = None 209 self.version = None 210 self.arch = None 211 self.module = None 212 self.symfile = None 213 self.slide = None 214 215 def dump(self, prefix): 216 print "%s%s" % (prefix, self) 217 218 def debug_dump(self): 219 print 'path = "%s"' % (self.path) 220 print 'resolved_path = "%s"' % (self.resolved_path) 221 print 'resolved = %i' % (self.resolved) 222 print 'unavailable = %i' % (self.unavailable) 223 print 'uuid = %s' % (self.uuid) 224 print 'section_infos = %s' % (self.section_infos) 225 print 'identifier = "%s"' % (self.identifier) 226 print 'version = %s' % (self.version) 227 print 'arch = %s' % (self.arch) 228 print 'module = %s' % (self.module) 229 print 'symfile = "%s"' % (self.symfile) 230 print 'slide = %i (0x%x)' % (self.slide, self.slide) 231 232 def __str__(self): 233 s = "%s %s %s" % (self.get_uuid(), self.version, self.get_resolved_path()) 234 for section_info in self.section_infos: 235 s += ", %s" % (section_info) 236 if self.slide != None: 237 s += ', slide = 0x%16.16x' % self.slide 238 return s 239 240 def add_section(self, section): 241 #print "added '%s' to '%s'" % (section, self.path) 242 self.section_infos.append (section) 243 244 def get_section_containing_load_addr (self, load_addr): 245 for section_info in self.section_infos: 246 if section_info.contains(load_addr): 247 return section_info 248 return None 249 250 def get_resolved_path(self): 251 if self.resolved_path: 252 return self.resolved_path 253 elif self.path: 254 return self.path 255 return None 256 257 def get_resolved_path_basename(self): 258 path = self.get_resolved_path() 259 if path: 260 return os.path.basename(path) 261 return None 262 263 def symfile_basename(self): 264 if self.symfile: 265 return os.path.basename(self.symfile) 266 return None 267 268 def has_section_load_info(self): 269 return self.section_infos or self.slide != None 270 271 def load_module(self, target): 272 if self.unavailable: 273 return None # We already warned that we couldn't find this module, so don't return an error string 274 # Load this module into "target" using the section infos to 275 # set the section load addresses 276 if self.has_section_load_info(): 277 if target: 278 if self.module: 279 if self.section_infos: 280 num_sections_loaded = 0 281 for section_info in self.section_infos: 282 if section_info.name: 283 section = self.module.FindSection (section_info.name) 284 if section: 285 error = target.SetSectionLoadAddress (section, section_info.start_addr) 286 if error.Success(): 287 num_sections_loaded += 1 288 else: 289 return 'error: %s' % error.GetCString() 290 else: 291 return 'error: unable to find the section named "%s"' % section_info.name 292 else: 293 return 'error: unable to find "%s" section in "%s"' % (range.name, self.get_resolved_path()) 294 if num_sections_loaded == 0: 295 return 'error: no sections were successfully loaded' 296 else: 297 err = target.SetModuleLoadAddress(self.module, self.slide) 298 if err.Fail(): 299 return err.GetCString() 300 return None 301 else: 302 return 'error: invalid module' 303 else: 304 return 'error: invalid target' 305 else: 306 return 'error: no section infos' 307 308 def add_module(self, target): 309 '''Add the Image described in this object to "target" and load the sections if "load" is True.''' 310 if target: 311 # Try and find using UUID only first so that paths need not match up 312 uuid_str = self.get_normalized_uuid_string() 313 if uuid_str: 314 self.module = target.AddModule (None, None, uuid_str) 315 if not self.module: 316 self.locate_module_and_debug_symbols () 317 if self.unavailable: 318 return None 319 resolved_path = self.get_resolved_path() 320 self.module = target.AddModule (resolved_path, self.arch, uuid_str, self.symfile) 321 if not self.module: 322 return 'error: unable to get module for (%s) "%s"' % (self.arch, self.get_resolved_path()) 323 if self.has_section_load_info(): 324 return self.load_module(target) 325 else: 326 return None # No sections, the module was added to the target, so success 327 else: 328 return 'error: invalid target' 329 330 def locate_module_and_debug_symbols (self): 331 # By default, just use the paths that were supplied in: 332 # self.path 333 # self.resolved_path 334 # self.module 335 # self.symfile 336 # Subclasses can inherit from this class and override this function 337 self.resolved = True 338 return True 339 340 def get_uuid(self): 341 if not self.uuid and self.module: 342 self.uuid = uuid.UUID(self.module.GetUUIDString()) 343 return self.uuid 344 345 def get_normalized_uuid_string(self): 346 if self.uuid: 347 return str(self.uuid).upper() 348 return None 349 350 def create_target(self): 351 '''Create a target using the information in this Image object.''' 352 if self.unavailable: 353 return None 354 355 if self.locate_module_and_debug_symbols (): 356 resolved_path = self.get_resolved_path(); 357 path_spec = lldb.SBFileSpec (resolved_path) 358 #result.PutCString ('plist[%s] = %s' % (uuid, self.plist)) 359 error = lldb.SBError() 360 target = lldb.debugger.CreateTarget (resolved_path, self.arch, None, False, error); 361 if target: 362 self.module = target.FindModule(path_spec) 363 if self.has_section_load_info(): 364 err = self.load_module(target) 365 if err: 366 print 'ERROR: ', err 367 return target 368 else: 369 print 'error: unable to create a valid target for (%s) "%s"' % (self.arch, self.path) 370 else: 371 print 'error: unable to locate main executable (%s) "%s"' % (self.arch, self.path) 372 return None 373 374class Symbolicator: 375 376 def __init__(self): 377 """A class the represents the information needed to symbolicate addresses in a program""" 378 self.target = None 379 self.images = list() # a list of images to be used when symbolicating 380 381 382 def __str__(self): 383 s = "Symbolicator:\n" 384 if self.target: 385 s += "Target = '%s'\n" % (self.target) 386 s += "Target modules:'\n" 387 for m in self.target.modules: 388 print m 389 s += "Images:\n" 390 for image in self.images: 391 s += ' %s\n' % (image) 392 return s 393 394 def find_images_with_identifier(self, identifier): 395 images = list() 396 for image in self.images: 397 if image.identifier == identifier: 398 images.append(image) 399 return images 400 401 def find_image_containing_load_addr(self, load_addr): 402 for image in self.images: 403 if image.get_section_containing_load_addr (load_addr): 404 return image 405 return None 406 407 def create_target(self): 408 if self.target: 409 return self.target 410 411 if self.images: 412 for image in self.images: 413 self.target = image.create_target () 414 if self.target: 415 return self.target 416 return None 417 418 def symbolicate(self, load_addr, verbose = False): 419 if not self.target: 420 self.create_target() 421 if self.target: 422 live_process = False 423 process = self.target.process 424 if process: 425 state = process.state 426 if state > lldb.eStateUnloaded and state < eStateDetached: 427 live_process = True 428 # If we don't have a live process, we can attempt to find the image 429 # that a load address belongs to and lazily load its module in the 430 # target, but we shouldn't do any of this if we have a live process 431 if not live_process: 432 image = self.find_image_containing_load_addr (load_addr) 433 if image: 434 image.add_module (self.target) 435 symbolicated_address = Address(self.target, load_addr) 436 if symbolicated_address.symbolicate (verbose): 437 if symbolicated_address.so_addr: 438 symbolicated_addresses = list() 439 symbolicated_addresses.append(symbolicated_address) 440 # See if we were able to reconstruct anything? 441 while 1: 442 inlined_parent_so_addr = lldb.SBAddress() 443 inlined_parent_sym_ctx = symbolicated_address.sym_ctx.GetParentOfInlinedScope (symbolicated_address.so_addr, inlined_parent_so_addr) 444 if not inlined_parent_sym_ctx: 445 break 446 if not inlined_parent_so_addr: 447 break 448 449 symbolicated_address = Address(self.target, inlined_parent_so_addr.GetLoadAddress(self.target)) 450 symbolicated_address.sym_ctx = inlined_parent_sym_ctx 451 symbolicated_address.so_addr = inlined_parent_so_addr 452 symbolicated_address.symbolicate (verbose) 453 454 # push the new frame onto the new frame stack 455 symbolicated_addresses.append (symbolicated_address) 456 457 if symbolicated_addresses: 458 return symbolicated_addresses 459 else: 460 print 'error: no target in Symbolicator' 461 return None 462 463 464def disassemble_instructions (target, instructions, pc, insts_before_pc, insts_after_pc, non_zeroeth_frame): 465 lines = list() 466 pc_index = -1 467 comment_column = 50 468 for inst_idx, inst in enumerate(instructions): 469 inst_pc = inst.GetAddress().GetLoadAddress(target); 470 if pc == inst_pc: 471 pc_index = inst_idx 472 mnemonic = inst.GetMnemonic (target) 473 operands = inst.GetOperands (target) 474 comment = inst.GetComment (target) 475 #data = inst.GetData (target) 476 lines.append ("%#16.16x: %8s %s" % (inst_pc, mnemonic, operands)) 477 if comment: 478 line_len = len(lines[-1]) 479 if line_len < comment_column: 480 lines[-1] += ' ' * (comment_column - line_len) 481 lines[-1] += "; %s" % comment 482 483 if pc_index >= 0: 484 # If we are disassembling the non-zeroeth frame, we need to backup the PC by 1 485 if non_zeroeth_frame and pc_index > 0: 486 pc_index = pc_index - 1 487 if insts_before_pc == -1: 488 start_idx = 0 489 else: 490 start_idx = pc_index - insts_before_pc 491 if start_idx < 0: 492 start_idx = 0 493 if insts_before_pc == -1: 494 end_idx = inst_idx 495 else: 496 end_idx = pc_index + insts_after_pc 497 if end_idx > inst_idx: 498 end_idx = inst_idx 499 for i in range(start_idx, end_idx+1): 500 if i == pc_index: 501 print ' -> ', lines[i] 502 else: 503 print ' ', lines[i] 504 505def print_module_section_data (section): 506 print section 507 section_data = section.GetSectionData() 508 if section_data: 509 ostream = lldb.SBStream() 510 section_data.GetDescription (ostream, section.GetFileAddress()) 511 print ostream.GetData() 512 513def print_module_section (section, depth): 514 print section 515 if depth > 0: 516 num_sub_sections = section.GetNumSubSections() 517 for sect_idx in range(num_sub_sections): 518 print_module_section (section.GetSubSectionAtIndex(sect_idx), depth - 1) 519 520def print_module_sections (module, depth): 521 for sect in module.section_iter(): 522 print_module_section (sect, depth) 523 524def print_module_symbols (module): 525 for sym in module: 526 print sym 527 528def Symbolicate(command_args): 529 530 usage = "usage: %prog [options] <addr1> [addr2 ...]" 531 description='''Symbolicate one or more addresses using LLDB's python scripting API..''' 532 parser = optparse.OptionParser(description=description, prog='crashlog.py',usage=usage) 533 parser.add_option('-v', '--verbose', action='store_true', dest='verbose', help='display verbose debug info', default=False) 534 parser.add_option('-p', '--platform', type='string', metavar='platform', dest='platform', help='specify one platform by name') 535 parser.add_option('-f', '--file', type='string', metavar='file', dest='file', help='Specify a file to use when symbolicating') 536 parser.add_option('-a', '--arch', type='string', metavar='arch', dest='arch', help='Specify a architecture to use when symbolicating') 537 parser.add_option('-s', '--slide', type='int', metavar='slide', dest='slide', help='Specify the slide to use on the file specified with the --file option', default=None) 538 parser.add_option('--section', type='string', action='append', dest='section_strings', help='specify <sect-name>=<start-addr> or <sect-name>=<start-addr>-<end-addr>') 539 try: 540 (options, args) = parser.parse_args(command_args) 541 except: 542 return 543 symbolicator = Symbolicator() 544 images = list(); 545 if options.file: 546 image = Image(options.file); 547 image.arch = options.arch 548 # Add any sections that were specified with one or more --section options 549 if options.section_strings: 550 for section_str in options.section_strings: 551 section = Section() 552 if section.set_from_string (section_str): 553 image.add_section (section) 554 else: 555 sys.exit(1) 556 if options.slide != None: 557 image.slide = options.slide 558 symbolicator.images.append(image) 559 560 target = symbolicator.create_target() 561 if options.verbose: 562 print symbolicator 563 if target: 564 for addr_str in args: 565 addr = int(addr_str, 0) 566 symbolicated_addrs = symbolicator.symbolicate(addr, options.verbose) 567 for symbolicated_addr in symbolicated_addrs: 568 print symbolicated_addr 569 print 570 else: 571 print 'error: no target for %s' % (symbolicator) 572 573if __name__ == '__main__': 574 # Create a new debugger instance 575 lldb.debugger = lldb.SBDebugger.Create() 576 Symbolicate (sys.argv[1:]) 577