forked from OSchip/llvm-project
728 lines
27 KiB
Python
Executable File
728 lines
27 KiB
Python
Executable File
#!/usr/bin/python
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#----------------------------------------------------------------------
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# Be sure to add the python path that points to the LLDB shared library.
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#
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# To use this in the embedded python interpreter using "lldb":
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#
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# cd /path/containing/crashlog.py
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# lldb
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# (lldb) script import crashlog
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# "crashlog" command installed, type "crashlog --help" for detailed help
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# (lldb) crashlog ~/Library/Logs/DiagnosticReports/a.crash
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#
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# The benefit of running the crashlog command inside lldb in the
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# embedded python interpreter is when the command completes, there
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# will be a target with all of the files loaded at the locations
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# described in the crash log. Only the files that have stack frames
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# in the backtrace will be loaded unless the "--load-all" option
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# has been specified. This allows users to explore the program in the
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# state it was in right at crash time.
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#
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# On MacOSX csh, tcsh:
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# ( setenv PYTHONPATH /path/to/LLDB.framework/Resources/Python ; ./crashlog.py ~/Library/Logs/DiagnosticReports/a.crash )
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#
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# On MacOSX sh, bash:
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# PYTHONPATH=/path/to/LLDB.framework/Resources/Python ./crashlog.py ~/Library/Logs/DiagnosticReports/a.crash
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#----------------------------------------------------------------------
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import lldb
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import commands
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import optparse
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import os
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import plistlib
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import re
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import shlex
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import sys
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import time
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import uuid
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class Address:
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"""Class that represents an address that will be symbolicated"""
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def __init__(self, target, load_addr):
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self.target = target
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self.load_addr = load_addr # The load address that this object represents
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# the resolved lldb.SBAddress (if any), named so_addr for
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# section/offset address
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self.so_addr = None
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self.sym_ctx = None # The cached symbol context for this address
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# Any original textual description of this address to be used as a
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# backup in case symbolication fails
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self.description = None
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self.symbolication = None # The cached symbolicated string that describes this address
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self.inlined = False
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def __str__(self):
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s = "%#16.16x" % (self.load_addr)
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if self.symbolication:
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s += " %s" % (self.symbolication)
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elif self.description:
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s += " %s" % (self.description)
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elif self.so_addr:
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s += " %s" % (self.so_addr)
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return s
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def resolve_addr(self):
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if self.so_addr is None:
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self.so_addr = self.target.ResolveLoadAddress(self.load_addr)
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return self.so_addr
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def is_inlined(self):
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return self.inlined
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def get_symbol_context(self):
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if self.sym_ctx is None:
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sb_addr = self.resolve_addr()
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if sb_addr:
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self.sym_ctx = self.target.ResolveSymbolContextForAddress(
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sb_addr, lldb.eSymbolContextEverything)
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else:
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self.sym_ctx = lldb.SBSymbolContext()
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return self.sym_ctx
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def get_instructions(self):
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sym_ctx = self.get_symbol_context()
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if sym_ctx:
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function = sym_ctx.GetFunction()
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if function:
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return function.GetInstructions(self.target)
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return sym_ctx.GetSymbol().GetInstructions(self.target)
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return None
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def symbolicate(self, verbose=False):
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if self.symbolication is None:
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self.symbolication = ''
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self.inlined = False
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sym_ctx = self.get_symbol_context()
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if sym_ctx:
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module = sym_ctx.GetModule()
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if module:
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# Print full source file path in verbose mode
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if verbose:
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self.symbolication += str(module.GetFileSpec()) + '`'
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else:
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self.symbolication += module.GetFileSpec().GetFilename() + '`'
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function_start_load_addr = -1
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function = sym_ctx.GetFunction()
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block = sym_ctx.GetBlock()
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line_entry = sym_ctx.GetLineEntry()
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symbol = sym_ctx.GetSymbol()
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inlined_block = block.GetContainingInlinedBlock()
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if function:
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self.symbolication += function.GetName()
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if inlined_block:
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self.inlined = True
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self.symbolication += ' [inlined] ' + \
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inlined_block.GetInlinedName()
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block_range_idx = inlined_block.GetRangeIndexForBlockAddress(
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self.so_addr)
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if block_range_idx < lldb.UINT32_MAX:
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block_range_start_addr = inlined_block.GetRangeStartAddress(
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block_range_idx)
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function_start_load_addr = block_range_start_addr.GetLoadAddress(
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self.target)
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if function_start_load_addr == -1:
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function_start_load_addr = function.GetStartAddress().GetLoadAddress(self.target)
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elif symbol:
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self.symbolication += symbol.GetName()
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function_start_load_addr = symbol.GetStartAddress().GetLoadAddress(self.target)
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else:
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self.symbolication = ''
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return False
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# Dump the offset from the current function or symbol if it
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# is non zero
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function_offset = self.load_addr - function_start_load_addr
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if function_offset > 0:
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self.symbolication += " + %u" % (function_offset)
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elif function_offset < 0:
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self.symbolication += " %i (invalid negative offset, file a bug) " % function_offset
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# Print out any line information if any is available
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if line_entry.GetFileSpec():
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# Print full source file path in verbose mode
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if verbose:
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self.symbolication += ' at %s' % line_entry.GetFileSpec()
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else:
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self.symbolication += ' at %s' % line_entry.GetFileSpec().GetFilename()
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self.symbolication += ':%u' % line_entry.GetLine()
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column = line_entry.GetColumn()
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if column > 0:
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self.symbolication += ':%u' % column
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return True
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return False
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class Section:
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"""Class that represents an load address range"""
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sect_info_regex = re.compile('(?P<name>[^=]+)=(?P<range>.*)')
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addr_regex = re.compile('^\s*(?P<start>0x[0-9A-Fa-f]+)\s*$')
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range_regex = re.compile(
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'^\s*(?P<start>0x[0-9A-Fa-f]+)\s*(?P<op>[-+])\s*(?P<end>0x[0-9A-Fa-f]+)\s*$')
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def __init__(self, start_addr=None, end_addr=None, name=None):
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self.start_addr = start_addr
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self.end_addr = end_addr
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self.name = name
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@classmethod
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def InitWithSBTargetAndSBSection(cls, target, section):
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sect_load_addr = section.GetLoadAddress(target)
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if sect_load_addr != lldb.LLDB_INVALID_ADDRESS:
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obj = cls(
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sect_load_addr,
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sect_load_addr +
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section.size,
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section.name)
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return obj
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else:
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return None
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def contains(self, addr):
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return self.start_addr <= addr and addr < self.end_addr
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def set_from_string(self, s):
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match = self.sect_info_regex.match(s)
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if match:
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self.name = match.group('name')
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range_str = match.group('range')
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addr_match = self.addr_regex.match(range_str)
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if addr_match:
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self.start_addr = int(addr_match.group('start'), 16)
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self.end_addr = None
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return True
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range_match = self.range_regex.match(range_str)
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if range_match:
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self.start_addr = int(range_match.group('start'), 16)
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self.end_addr = int(range_match.group('end'), 16)
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op = range_match.group('op')
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if op == '+':
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self.end_addr += self.start_addr
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return True
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print 'error: invalid section info string "%s"' % s
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print 'Valid section info formats are:'
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print 'Format Example Description'
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print '--------------------- -----------------------------------------------'
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print '<name>=<base> __TEXT=0x123000 Section from base address only'
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print '<name>=<base>-<end> __TEXT=0x123000-0x124000 Section from base address and end address'
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print '<name>=<base>+<size> __TEXT=0x123000+0x1000 Section from base address and size'
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return False
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def __str__(self):
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if self.name:
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if self.end_addr is not None:
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if self.start_addr is not None:
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return "%s=[0x%16.16x - 0x%16.16x)" % (
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self.name, self.start_addr, self.end_addr)
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else:
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if self.start_addr is not None:
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return "%s=0x%16.16x" % (self.name, self.start_addr)
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return self.name
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return "<invalid>"
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class Image:
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"""A class that represents an executable image and any associated data"""
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def __init__(self, path, uuid=None):
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self.path = path
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self.resolved_path = None
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self.resolved = False
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self.unavailable = False
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self.uuid = uuid
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self.section_infos = list()
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self.identifier = None
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self.version = None
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self.arch = None
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self.module = None
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self.symfile = None
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self.slide = None
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@classmethod
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def InitWithSBTargetAndSBModule(cls, target, module):
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'''Initialize this Image object with a module from a target.'''
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obj = cls(module.file.fullpath, module.uuid)
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obj.resolved_path = module.platform_file.fullpath
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obj.resolved = True
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obj.arch = module.triple
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for section in module.sections:
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symb_section = Section.InitWithSBTargetAndSBSection(
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target, section)
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if symb_section:
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obj.section_infos.append(symb_section)
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obj.arch = module.triple
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obj.module = module
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obj.symfile = None
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obj.slide = None
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return obj
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def dump(self, prefix):
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print "%s%s" % (prefix, self)
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def debug_dump(self):
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print 'path = "%s"' % (self.path)
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print 'resolved_path = "%s"' % (self.resolved_path)
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print 'resolved = %i' % (self.resolved)
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print 'unavailable = %i' % (self.unavailable)
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print 'uuid = %s' % (self.uuid)
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print 'section_infos = %s' % (self.section_infos)
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print 'identifier = "%s"' % (self.identifier)
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print 'version = %s' % (self.version)
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print 'arch = %s' % (self.arch)
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print 'module = %s' % (self.module)
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print 'symfile = "%s"' % (self.symfile)
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print 'slide = %i (0x%x)' % (self.slide, self.slide)
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def __str__(self):
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s = ''
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if self.uuid:
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s += "%s " % (self.get_uuid())
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if self.arch:
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s += "%s " % (self.arch)
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if self.version:
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s += "%s " % (self.version)
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resolved_path = self.get_resolved_path()
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if resolved_path:
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s += "%s " % (resolved_path)
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for section_info in self.section_infos:
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s += ", %s" % (section_info)
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if self.slide is not None:
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s += ', slide = 0x%16.16x' % self.slide
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return s
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def add_section(self, section):
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# print "added '%s' to '%s'" % (section, self.path)
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self.section_infos.append(section)
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def get_section_containing_load_addr(self, load_addr):
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for section_info in self.section_infos:
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if section_info.contains(load_addr):
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return section_info
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return None
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def get_resolved_path(self):
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if self.resolved_path:
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return self.resolved_path
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elif self.path:
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return self.path
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return None
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def get_resolved_path_basename(self):
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path = self.get_resolved_path()
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if path:
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return os.path.basename(path)
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return None
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def symfile_basename(self):
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if self.symfile:
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return os.path.basename(self.symfile)
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return None
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def has_section_load_info(self):
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return self.section_infos or self.slide is not None
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def load_module(self, target):
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if self.unavailable:
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return None # We already warned that we couldn't find this module, so don't return an error string
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# Load this module into "target" using the section infos to
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# set the section load addresses
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if self.has_section_load_info():
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if target:
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if self.module:
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if self.section_infos:
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num_sections_loaded = 0
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for section_info in self.section_infos:
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if section_info.name:
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section = self.module.FindSection(
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section_info.name)
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if section:
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error = target.SetSectionLoadAddress(
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section, section_info.start_addr)
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if error.Success():
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num_sections_loaded += 1
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else:
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return 'error: %s' % error.GetCString()
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else:
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return 'error: unable to find the section named "%s"' % section_info.name
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else:
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return 'error: unable to find "%s" section in "%s"' % (
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range.name, self.get_resolved_path())
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if num_sections_loaded == 0:
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return 'error: no sections were successfully loaded'
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else:
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err = target.SetModuleLoadAddress(
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self.module, self.slide)
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if err.Fail():
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return err.GetCString()
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return None
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else:
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return 'error: invalid module'
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else:
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return 'error: invalid target'
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else:
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return 'error: no section infos'
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def add_module(self, target):
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'''Add the Image described in this object to "target" and load the sections if "load" is True.'''
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if target:
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# Try and find using UUID only first so that paths need not match
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# up
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uuid_str = self.get_normalized_uuid_string()
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if uuid_str:
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self.module = target.AddModule(None, None, uuid_str)
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if not self.module:
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self.locate_module_and_debug_symbols()
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if self.unavailable:
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return None
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resolved_path = self.get_resolved_path()
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self.module = target.AddModule(
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resolved_path, self.arch, uuid_str, self.symfile)
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if not self.module:
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return 'error: unable to get module for (%s) "%s"' % (
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self.arch, self.get_resolved_path())
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if self.has_section_load_info():
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return self.load_module(target)
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else:
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return None # No sections, the module was added to the target, so success
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else:
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return 'error: invalid target'
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def locate_module_and_debug_symbols(self):
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# By default, just use the paths that were supplied in:
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# self.path
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# self.resolved_path
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# self.module
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# self.symfile
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# Subclasses can inherit from this class and override this function
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self.resolved = True
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return True
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def get_uuid(self):
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if not self.uuid and self.module:
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self.uuid = uuid.UUID(self.module.GetUUIDString())
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return self.uuid
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def get_normalized_uuid_string(self):
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if self.uuid:
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return str(self.uuid).upper()
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return None
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def create_target(self):
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'''Create a target using the information in this Image object.'''
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if self.unavailable:
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return None
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if self.locate_module_and_debug_symbols():
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resolved_path = self.get_resolved_path()
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path_spec = lldb.SBFileSpec(resolved_path)
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#result.PutCString ('plist[%s] = %s' % (uuid, self.plist))
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error = lldb.SBError()
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target = lldb.debugger.CreateTarget(
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resolved_path, self.arch, None, False, error)
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if target:
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self.module = target.FindModule(path_spec)
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if self.has_section_load_info():
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err = self.load_module(target)
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if err:
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print 'ERROR: ', err
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return target
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else:
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print 'error: unable to create a valid target for (%s) "%s"' % (self.arch, self.path)
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else:
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print 'error: unable to locate main executable (%s) "%s"' % (self.arch, self.path)
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return None
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class Symbolicator:
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def __init__(self):
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"""A class the represents the information needed to symbolicate addresses in a program"""
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self.target = None
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self.images = list() # a list of images to be used when symbolicating
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self.addr_mask = 0xffffffffffffffff
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@classmethod
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def InitWithSBTarget(cls, target):
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obj = cls()
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obj.target = target
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obj.images = list()
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triple = target.triple
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if triple:
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arch = triple.split('-')[0]
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if "arm" in arch:
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obj.addr_mask = 0xfffffffffffffffe
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for module in target.modules:
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image = Image.InitWithSBTargetAndSBModule(target, module)
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obj.images.append(image)
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return obj
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def __str__(self):
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s = "Symbolicator:\n"
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if self.target:
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s += "Target = '%s'\n" % (self.target)
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s += "Target modules:\n"
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for m in self.target.modules:
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s += str(m) + "\n"
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s += "Images:\n"
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for image in self.images:
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s += ' %s\n' % (image)
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return s
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def find_images_with_identifier(self, identifier):
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images = list()
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for image in self.images:
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if image.identifier == identifier:
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images.append(image)
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if len(images) == 0:
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regex_text = '^.*\.%s$' % (re.escape(identifier))
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regex = re.compile(regex_text)
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for image in self.images:
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if regex.match(image.identifier):
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images.append(image)
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return images
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def find_image_containing_load_addr(self, load_addr):
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for image in self.images:
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if image.get_section_containing_load_addr(load_addr):
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return image
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return None
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def create_target(self):
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if self.target:
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return self.target
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if self.images:
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for image in self.images:
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self.target = image.create_target()
|
|
if self.target:
|
|
if self.target.GetAddressByteSize() == 4:
|
|
triple = self.target.triple
|
|
if triple:
|
|
arch = triple.split('-')[0]
|
|
if "arm" in arch:
|
|
self.addr_mask = 0xfffffffffffffffe
|
|
return self.target
|
|
return None
|
|
|
|
def symbolicate(self, load_addr, verbose=False):
|
|
if not self.target:
|
|
self.create_target()
|
|
if self.target:
|
|
live_process = False
|
|
process = self.target.process
|
|
if process:
|
|
state = process.state
|
|
if state > lldb.eStateUnloaded and state < lldb.eStateDetached:
|
|
live_process = True
|
|
# If we don't have a live process, we can attempt to find the image
|
|
# that a load address belongs to and lazily load its module in the
|
|
# target, but we shouldn't do any of this if we have a live process
|
|
if not live_process:
|
|
image = self.find_image_containing_load_addr(load_addr)
|
|
if image:
|
|
image.add_module(self.target)
|
|
symbolicated_address = Address(self.target, load_addr)
|
|
if symbolicated_address.symbolicate(verbose):
|
|
if symbolicated_address.so_addr:
|
|
symbolicated_addresses = list()
|
|
symbolicated_addresses.append(symbolicated_address)
|
|
# See if we were able to reconstruct anything?
|
|
while True:
|
|
inlined_parent_so_addr = lldb.SBAddress()
|
|
inlined_parent_sym_ctx = symbolicated_address.sym_ctx.GetParentOfInlinedScope(
|
|
symbolicated_address.so_addr, inlined_parent_so_addr)
|
|
if not inlined_parent_sym_ctx:
|
|
break
|
|
if not inlined_parent_so_addr:
|
|
break
|
|
|
|
symbolicated_address = Address(
|
|
self.target, inlined_parent_so_addr.GetLoadAddress(
|
|
self.target))
|
|
symbolicated_address.sym_ctx = inlined_parent_sym_ctx
|
|
symbolicated_address.so_addr = inlined_parent_so_addr
|
|
symbolicated_address.symbolicate(verbose)
|
|
|
|
# push the new frame onto the new frame stack
|
|
symbolicated_addresses.append(symbolicated_address)
|
|
|
|
if symbolicated_addresses:
|
|
return symbolicated_addresses
|
|
else:
|
|
print 'error: no target in Symbolicator'
|
|
return None
|
|
|
|
|
|
def disassemble_instructions(
|
|
target,
|
|
instructions,
|
|
pc,
|
|
insts_before_pc,
|
|
insts_after_pc,
|
|
non_zeroeth_frame):
|
|
lines = list()
|
|
pc_index = -1
|
|
comment_column = 50
|
|
for inst_idx, inst in enumerate(instructions):
|
|
inst_pc = inst.GetAddress().GetLoadAddress(target)
|
|
if pc == inst_pc:
|
|
pc_index = inst_idx
|
|
mnemonic = inst.GetMnemonic(target)
|
|
operands = inst.GetOperands(target)
|
|
comment = inst.GetComment(target)
|
|
#data = inst.GetData (target)
|
|
lines.append("%#16.16x: %8s %s" % (inst_pc, mnemonic, operands))
|
|
if comment:
|
|
line_len = len(lines[-1])
|
|
if line_len < comment_column:
|
|
lines[-1] += ' ' * (comment_column - line_len)
|
|
lines[-1] += "; %s" % comment
|
|
|
|
if pc_index >= 0:
|
|
# If we are disassembling the non-zeroeth frame, we need to backup the
|
|
# PC by 1
|
|
if non_zeroeth_frame and pc_index > 0:
|
|
pc_index = pc_index - 1
|
|
if insts_before_pc == -1:
|
|
start_idx = 0
|
|
else:
|
|
start_idx = pc_index - insts_before_pc
|
|
if start_idx < 0:
|
|
start_idx = 0
|
|
if insts_before_pc == -1:
|
|
end_idx = inst_idx
|
|
else:
|
|
end_idx = pc_index + insts_after_pc
|
|
if end_idx > inst_idx:
|
|
end_idx = inst_idx
|
|
for i in range(start_idx, end_idx + 1):
|
|
if i == pc_index:
|
|
print ' -> ', lines[i]
|
|
else:
|
|
print ' ', lines[i]
|
|
|
|
|
|
def print_module_section_data(section):
|
|
print section
|
|
section_data = section.GetSectionData()
|
|
if section_data:
|
|
ostream = lldb.SBStream()
|
|
section_data.GetDescription(ostream, section.GetFileAddress())
|
|
print ostream.GetData()
|
|
|
|
|
|
def print_module_section(section, depth):
|
|
print section
|
|
if depth > 0:
|
|
num_sub_sections = section.GetNumSubSections()
|
|
for sect_idx in range(num_sub_sections):
|
|
print_module_section(
|
|
section.GetSubSectionAtIndex(sect_idx), depth - 1)
|
|
|
|
|
|
def print_module_sections(module, depth):
|
|
for sect in module.section_iter():
|
|
print_module_section(sect, depth)
|
|
|
|
|
|
def print_module_symbols(module):
|
|
for sym in module:
|
|
print sym
|
|
|
|
|
|
def Symbolicate(command_args):
|
|
|
|
usage = "usage: %prog [options] <addr1> [addr2 ...]"
|
|
description = '''Symbolicate one or more addresses using LLDB's python scripting API..'''
|
|
parser = optparse.OptionParser(
|
|
description=description,
|
|
prog='crashlog.py',
|
|
usage=usage)
|
|
parser.add_option(
|
|
'-v',
|
|
'--verbose',
|
|
action='store_true',
|
|
dest='verbose',
|
|
help='display verbose debug info',
|
|
default=False)
|
|
parser.add_option(
|
|
'-p',
|
|
'--platform',
|
|
type='string',
|
|
metavar='platform',
|
|
dest='platform',
|
|
help='Specify the platform to use when creating the debug target. Valid values include "localhost", "darwin-kernel", "ios-simulator", "remote-freebsd", "remote-macosx", "remote-ios", "remote-linux".')
|
|
parser.add_option(
|
|
'-f',
|
|
'--file',
|
|
type='string',
|
|
metavar='file',
|
|
dest='file',
|
|
help='Specify a file to use when symbolicating')
|
|
parser.add_option(
|
|
'-a',
|
|
'--arch',
|
|
type='string',
|
|
metavar='arch',
|
|
dest='arch',
|
|
help='Specify a architecture to use when symbolicating')
|
|
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)
|
|
parser.add_option(
|
|
'--section',
|
|
type='string',
|
|
action='append',
|
|
dest='section_strings',
|
|
help='specify <sect-name>=<start-addr> or <sect-name>=<start-addr>-<end-addr>')
|
|
try:
|
|
(options, args) = parser.parse_args(command_args)
|
|
except:
|
|
return
|
|
symbolicator = Symbolicator()
|
|
images = list()
|
|
if options.file:
|
|
image = Image(options.file)
|
|
image.arch = options.arch
|
|
# Add any sections that were specified with one or more --section
|
|
# options
|
|
if options.section_strings:
|
|
for section_str in options.section_strings:
|
|
section = Section()
|
|
if section.set_from_string(section_str):
|
|
image.add_section(section)
|
|
else:
|
|
sys.exit(1)
|
|
if options.slide is not None:
|
|
image.slide = options.slide
|
|
symbolicator.images.append(image)
|
|
|
|
target = symbolicator.create_target()
|
|
if options.verbose:
|
|
print symbolicator
|
|
if target:
|
|
for addr_str in args:
|
|
addr = int(addr_str, 0)
|
|
symbolicated_addrs = symbolicator.symbolicate(
|
|
addr, options.verbose)
|
|
for symbolicated_addr in symbolicated_addrs:
|
|
print symbolicated_addr
|
|
print
|
|
else:
|
|
print 'error: no target for %s' % (symbolicator)
|
|
|
|
if __name__ == '__main__':
|
|
# Create a new debugger instance
|
|
lldb.debugger = lldb.SBDebugger.Create()
|
|
Symbolicate(sys.argv[1:])
|