244 lines
9.4 KiB
Python
Executable File
244 lines
9.4 KiB
Python
Executable File
#!/usr/bin/env python
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"""
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Run lldb to disassemble all the available functions for an executable image.
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"""
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import os
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import re
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import sys
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from optparse import OptionParser
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def setupSysPath():
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"""
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Add LLDB.framework/Resources/Python and the test dir to the sys.path.
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"""
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# Get the directory containing the current script.
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scriptPath = sys.path[0]
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if not scriptPath.endswith(os.path.join('utils', 'test')):
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print "This script expects to reside in lldb's utils/test directory."
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sys.exit(-1)
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# This is our base name component.
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base = os.path.abspath(os.path.join(scriptPath, os.pardir, os.pardir))
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# This is for the goodies in the test directory under base.
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sys.path.append(os.path.join(base,'test'))
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# These are for xcode build directories.
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xcode3_build_dir = ['build']
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xcode4_build_dir = ['build', 'lldb', 'Build', 'Products']
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dbg = ['Debug']
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rel = ['Release']
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bai = ['BuildAndIntegration']
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python_resource_dir = ['LLDB.framework', 'Resources', 'Python']
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dbgPath = os.path.join(base, *(xcode3_build_dir + dbg + python_resource_dir))
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dbgPath2 = os.path.join(base, *(xcode4_build_dir + dbg + python_resource_dir))
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relPath = os.path.join(base, *(xcode3_build_dir + rel + python_resource_dir))
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relPath2 = os.path.join(base, *(xcode4_build_dir + rel + python_resource_dir))
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baiPath = os.path.join(base, *(xcode3_build_dir + bai + python_resource_dir))
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baiPath2 = os.path.join(base, *(xcode4_build_dir + bai + python_resource_dir))
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lldbPath = None
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if os.path.isfile(os.path.join(dbgPath, 'lldb.py')):
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lldbPath = dbgPath
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elif os.path.isfile(os.path.join(dbgPath2, 'lldb.py')):
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lldbPath = dbgPath2
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elif os.path.isfile(os.path.join(relPath, 'lldb.py')):
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lldbPath = relPath
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elif os.path.isfile(os.path.join(relPath2, 'lldb.py')):
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lldbPath = relPath2
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elif os.path.isfile(os.path.join(baiPath, 'lldb.py')):
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lldbPath = baiPath
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elif os.path.isfile(os.path.join(baiPath2, 'lldb.py')):
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lldbPath = baiPath2
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if not lldbPath:
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print 'This script requires lldb.py to be in either ' + dbgPath + ',',
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print relPath + ', or ' + baiPath
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sys.exit(-1)
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# This is to locate the lldb.py module. Insert it right after sys.path[0].
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sys.path[1:1] = [lldbPath]
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#print "sys.path:", sys.path
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def run_command(ci, cmd, res, echo=True):
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if echo:
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print "run command:", cmd
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ci.HandleCommand(cmd, res)
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if res.Succeeded():
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if echo:
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print "run_command output:", res.GetOutput()
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else:
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if echo:
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print "run command failed!"
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print "run_command error:", res.GetError()
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def do_lldb_disassembly(lldb_commands, exe, disassemble_options, num_symbols,
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symbols_to_disassemble,
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re_symbol_pattern,
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quiet_disassembly):
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import lldb, atexit, re
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# Create the debugger instance now.
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dbg = lldb.SBDebugger.Create()
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if not dbg:
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raise Exception('Invalid debugger instance')
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# Register an exit callback.
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atexit.register(lambda: lldb.SBDebugger.Terminate())
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# We want our debugger to be synchronous.
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dbg.SetAsync(False)
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# Get the command interpreter from the debugger.
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ci = dbg.GetCommandInterpreter()
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if not ci:
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raise Exception('Could not get the command interpreter')
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# And the associated result object.
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res = lldb.SBCommandReturnObject()
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# See if there any extra command(s) to execute before we issue the file command.
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for cmd in lldb_commands:
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run_command(ci, cmd, res, not quiet_disassembly)
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# Now issue the file command.
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run_command(ci, 'file %s' % exe, res, not quiet_disassembly)
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# Create a target.
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#target = dbg.CreateTarget(exe)
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target = dbg.GetSelectedTarget()
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stream = lldb.SBStream()
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def IsCodeType(symbol):
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"""Check whether an SBSymbol represents code."""
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return symbol.GetType() == lldb.eSymbolTypeCode
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# Define a generator for the symbols to disassemble.
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def symbol_iter(num, symbols, re_symbol_pattern, target, verbose):
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# If we specify the symbols to disassemble, ignore symbol table dump.
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if symbols:
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for i in range(len(symbols)):
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if verbose:
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print "symbol:", symbols[i]
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yield symbols[i]
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else:
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limited = True if num != -1 else False
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if limited:
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count = 0
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if re_symbol_pattern:
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pattern = re.compile(re_symbol_pattern)
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stream = lldb.SBStream()
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for m in target.module_iter():
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if verbose:
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print "module:", m
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for s in m:
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if limited and count >= num:
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return
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# If a regexp symbol pattern is supplied, consult it.
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if re_symbol_pattern:
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# If the pattern does not match, look for the next symbol.
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if not pattern.match(s.GetName()):
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continue
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# If we come here, we're ready to disassemble the symbol.
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if verbose:
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print "symbol:", s.GetName()
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if IsCodeType(s):
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if limited:
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count = count + 1
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if verbose:
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print "returning symbol:", s.GetName()
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yield s.GetName()
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if verbose:
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print "start address:", s.GetStartAddress()
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print "end address:", s.GetEndAddress()
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s.GetDescription(stream)
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print "symbol description:", stream.GetData()
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stream.Clear()
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# Disassembly time.
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for symbol in symbol_iter(num_symbols, symbols_to_disassemble, re_symbol_pattern, target, not quiet_disassembly):
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cmd = "disassemble %s '%s'" % (disassemble_options, symbol)
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run_command(ci, cmd, res, not quiet_disassembly)
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def main():
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# This is to set up the Python path to include the pexpect-2.4 dir.
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# Remember to update this when/if things change.
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scriptPath = sys.path[0]
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sys.path.append(os.path.join(scriptPath, os.pardir, os.pardir, 'test', 'pexpect-2.4'))
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parser = OptionParser(usage="""\
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Run lldb to disassemble all the available functions for an executable image.
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Usage: %prog [options]
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""")
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parser.add_option('-C', '--lldb-command',
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type='string', action='append', metavar='COMMAND',
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default=[], dest='lldb_commands',
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help='Command(s) lldb executes after starting up (can be empty)')
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parser.add_option('-e', '--executable',
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type='string', action='store',
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dest='executable',
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help="""Mandatory: the executable to do disassembly on.""")
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parser.add_option('-o', '--options',
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type='string', action='store',
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dest='disassemble_options',
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help="""Mandatory: the options passed to lldb's 'disassemble' command.""")
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parser.add_option('-q', '--quiet-disassembly',
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action='store_true', default=False,
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dest='quiet_disassembly',
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help="""The symbol(s) to invoke lldb's 'disassemble' command on, if specified.""")
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parser.add_option('-n', '--num-symbols',
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type='int', action='store', default=-1,
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dest='num_symbols',
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help="""The number of symbols to disassemble, if specified.""")
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parser.add_option('-p', '--symbol_pattern',
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type='string', action='store',
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dest='re_symbol_pattern',
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help="""The regular expression of symbols to invoke lldb's 'disassemble' command.""")
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parser.add_option('-s', '--symbol',
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type='string', action='append', metavar='SYMBOL', default=[],
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dest='symbols_to_disassemble',
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help="""The symbol(s) to invoke lldb's 'disassemble' command on, if specified.""")
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opts, args = parser.parse_args()
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lldb_commands = opts.lldb_commands
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if not opts.executable or not opts.disassemble_options:
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parser.print_help()
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sys.exit(1)
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executable = opts.executable
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disassemble_options = opts.disassemble_options
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quiet_disassembly = opts.quiet_disassembly
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num_symbols = opts.num_symbols
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symbols_to_disassemble = opts.symbols_to_disassemble
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re_symbol_pattern = opts.re_symbol_pattern
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# We have parsed the options.
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if not quiet_disassembly:
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print "lldb commands:", lldb_commands
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print "executable:", executable
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print "disassemble options:", disassemble_options
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print "quiet disassembly output:", quiet_disassembly
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print "num of symbols to disassemble:", num_symbols
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print "symbols to disassemble:", symbols_to_disassemble
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print "regular expression of symbols to disassemble:", re_symbol_pattern
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setupSysPath()
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do_lldb_disassembly(lldb_commands, executable, disassemble_options,
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num_symbols,
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symbols_to_disassemble,
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re_symbol_pattern,
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quiet_disassembly)
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if __name__ == '__main__':
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main()
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