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debugger.py
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debugger.py
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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
import os
import gc
import re
import sys
import time
import struct
import signal
import pickle
import tempfile
import psutil
from Peach.agent import Monitor
try:
import comtypes
from ctypes import *
from comtypes import HRESULT, COMError
from comtypes.client import CreateObject, GetEvents, PumpEvents
from comtypes.hresult import S_OK, E_FAIL, E_UNEXPECTED, E_INVALIDARG
from comtypes.automation import IID
import PyDbgEng
from comtypes.gen import DbgEng
import win32serviceutil
import win32service
import win32api, win32con, win32process, win32pdh
from multiprocessing import *
class _DbgEventHandler(PyDbgEng.IDebugOutputCallbacksSink, PyDbgEng.IDebugEventCallbacksSink):
buff = ''
TakeStackTrace = True
def LocateWinDbg(self):
"""
This method also exists in process.PageHeap!
"""
try:
hkey = win32api.RegOpenKey(win32con.HKEY_CURRENT_USER, "Software\\Microsoft\\DebuggingTools")
except:
# Lets try a few common places before failing.
pgPaths = [
"c:\\",
os.environ["SystemDrive"] + "\\",
os.environ["ProgramFiles"],
]
if "ProgramW6432" in os.environ:
pgPaths.append(os.environ["ProgramW6432"])
if "ProgramFiles(x86)" in os.environ:
pgPaths.append(os.environ["ProgramFiles(x86)"])
dbgPaths = [
"Debuggers",
"Debugger",
"Debugging Tools for Windows",
"Debugging Tools for Windows (x64)",
"Debugging Tools for Windows (x86)",
]
for p in pgPaths:
for d in dbgPaths:
testPath = os.path.join(p, d)
if os.path.exists(testPath):
return testPath
return None
val, type = win32api.RegQueryValueEx(hkey, "WinDbg")
win32api.RegCloseKey(hkey)
return val
def Output(self, this, Mask, Text):
self.buff += Text
def LoadModule(self, unknown, imageFileHandle, baseOffset, moduleSize, moduleName, imageName, checkSum,
timeDateStamp=None):
if self.pid is None:
self.dbg.idebug_control.Execute(DbgEng.DEBUG_OUTCTL_THIS_CLIENT,
c_char_p("|."),
DbgEng.DEBUG_EXECUTE_ECHO)
match = re.search(r"\.\s+\d+\s+id:\s+([0-9a-fA-F]+)\s+\w+\s+name:\s", self.buff)
if match is not None:
self.pid = int(match.group(1), 16)
# Write out PID for main peach process
fd = open(self.TempfilePid, "wb+")
fd.write(str(self.pid))
fd.close()
def GetInterestMask(self):
return PyDbgEng.DbgEng.DEBUG_EVENT_EXCEPTION | PyDbgEng.DbgEng.DEBUG_FILTER_INITIAL_BREAKPOINT | \
PyDbgEng.DbgEng.DEBUG_EVENT_EXIT_PROCESS | PyDbgEng.DbgEng.DEBUG_EVENT_LOAD_MODULE
def ExitProcess(self, dbg, ExitCode):
print("_DbgEventHandler.ExitProcess: Target application has exitted")
self.quit.set()
return DEBUG_STATUS_NO_CHANGE
def Exception(self, dbg, ExceptionCode, ExceptionFlags, ExceptionRecord,
ExceptionAddress, NumberParameters, ExceptionInformation0, ExceptionInformation1,
ExceptionInformation2, ExceptionInformation3, ExceptionInformation4,
ExceptionInformation5, ExceptionInformation6, ExceptionInformation7,
ExceptionInformation8, ExceptionInformation9, ExceptionInformation10,
ExceptionInformation11, ExceptionInformation12, ExceptionInformation13,
ExceptionInformation14, FirstChance):
if self.IgnoreSecondChanceGardPage and ExceptionCode == 0x80000001:
return DbgEng.DEBUG_STATUS_NO_CHANGE
# Only capture dangerouse first chance exceptions
if FirstChance:
if self.IgnoreFirstChanceGardPage and ExceptionCode == 0x80000001:
# Ignore, sometimes used as anti-debugger
# by Adobe Flash.
return DbgEng.DEBUG_STATUS_NO_CHANGE
# Guard page or illegal op
elif ExceptionCode == 0x80000001 or ExceptionCode == 0xC000001D:
pass
elif ExceptionCode == 0xC0000005:
# is av on eip?
if ExceptionInformation0 == 0 and ExceptionInformation1 == ExceptionAddress:
pass
# is write a/v?
elif ExceptionInformation0 == 1 and ExceptionInformation1 != 0:
pass
# is DEP?
elif ExceptionInformation0 == 0:
pass
else:
# Otherwise skip first chance
return DbgEng.DEBUG_STATUS_NO_CHANGE
else:
# otherwise skip first chance
return DbgEng.DEBUG_STATUS_NO_CHANGE
if self.handlingFault.is_set() or self.handledFault.is_set():
# We are already handling, so skip
#sys.stdout.write("_DbgEventHandler::Exception(): handlingFault set, skipping.\n")
return DbgEng.DEBUG_STATUS_BREAK
try:
print("Exception: Found interesting exception")
self.crashInfo = {}
self.handlingFault.set()
## 1. Output registers
print("Exception: 1. Output registers")
dbg.idebug_control.Execute(DbgEng.DEBUG_OUTCTL_THIS_CLIENT,
c_char_p("r"),
DbgEng.DEBUG_EXECUTE_ECHO)
dbg.idebug_control.Execute(DbgEng.DEBUG_OUTCTL_THIS_CLIENT,
c_char_p("rF"),
DbgEng.DEBUG_EXECUTE_ECHO)
dbg.idebug_control.Execute(DbgEng.DEBUG_OUTCTL_THIS_CLIENT,
c_char_p("rX"),
DbgEng.DEBUG_EXECUTE_ECHO)
self.buff += "\n\n"
## 2. Ouput stack trace
if _DbgEventHandler.TakeStackTrace:
print("Exception: 2. Output stack trace")
dbg.idebug_control.Execute(DbgEng.DEBUG_OUTCTL_THIS_CLIENT,
c_char_p("kb"),
DbgEng.DEBUG_EXECUTE_ECHO)
self.buff += "\n\n"
else:
_DbgEventHandler.TakeStackTrace = True
self.buff += "\n[Peach] Error, stack trace failed.\n\n"
## 3. Write dump file
minidump = None
## 4. Bang-Exploitable
print("Exception: 3. Bang-Exploitable")
handle = None
try:
p = None
if not (hasattr(sys, "frozen") and sys.frozen == "console_exe"):
p = __file__[:-24] + "tools\\bangexploitable\\"
if sys.version.find("AMD64") != -1:
p += "x64"
else:
p += "x86"
else:
p = os.path.dirname(os.path.abspath(sys.executable))
dbg.idebug_control.Execute(DbgEng.DEBUG_OUTCTL_THIS_CLIENT, c_char_p(".load %s\\msec.dll" % p),
DbgEng.DEBUG_EXECUTE_ECHO)
dbg.idebug_control.Execute(DbgEng.DEBUG_OUTCTL_THIS_CLIENT, c_char_p("!exploitable -m"),
DbgEng.DEBUG_EXECUTE_ECHO)
dbg.idebug_control.Execute(DbgEng.DEBUG_OUTCTL_THIS_CLIENT, c_char_p("!msec.exploitable -m"),
DbgEng.DEBUG_EXECUTE_ECHO)
except:
raise
## Now off to other things...
print("Exception: Building crashInfo")
if minidump:
self.crashInfo = {'StackTrace.txt': self.buff.replace(chr(0x0a), "\r\n"), 'Dump.dmp': minidump}
else:
self.crashInfo = {'StackTrace.txt': self.buff.replace(chr(0x0a), "\r\n")}
# Build bucket string
try:
bucketId = re.compile("DEFAULT_BUCKET_ID:\s+([A-Za-z_]+)").search(self.buff).group(1)
exceptionAddress = re.compile("ExceptionAddress: ([^\s\b]+)").search(self.buff).group(1)
exceptionCode = re.compile("ExceptionCode: ([^\s\b]+)").search(self.buff).group(1)
exceptionType = "AV"
if re.compile("READ_ADDRESS").search(self.buff) is not None:
exceptionType = "ReadAV"
elif re.compile("WRITE_ADDRESS").search(self.buff) is not None:
exceptionType = "WriteAV"
bucket = "%s_at_%s" % (exceptionType, exceptionAddress)
except:
# Sometimes !analyze -v fails
bucket = "Unknown"
self.crashInfo["Bucket"] = bucket
## Do we have !exploitable?
try:
majorHash = re.compile("^MAJOR_HASH:(0x.*)$", re.M).search(self.buff).group(1)
minorHash = re.compile("^MINOR_HASH:(0x.*)$", re.M).search(self.buff).group(1)
classification = re.compile("^CLASSIFICATION:(.*)$", re.M).search(self.buff).group(1)
shortDescription = re.compile("^SHORT_DESCRIPTION:(.*)$", re.M).search(self.buff).group(1)
if majorHash is not None and minorHash is not None:
bucket = "%s_%s_%s_%s" % (classification,
shortDescription,
majorHash,
minorHash)
self.crashInfo["Bucket"] = bucket
except:
pass
# Done
except:
sys.stdout.write(repr(sys.exc_info()) + "\n")
raise
self.buff = ""
self.fault = True
print("Exception: Writing to file")
fd = open(self.Tempfile, "wb+")
fd.write(pickle.dumps(self.crashInfo))
fd.close()
self.handledFault.set()
return DbgEng.DEBUG_STATUS_BREAK
def WindowsDebugEngineProcess_run(*args, **kwargs):
started = kwargs['Started']
handlingFault = kwargs['HandlingFault']
handledFault = kwargs['HandledFault']
CommandLine = kwargs.get('CommandLine', None)
Service = kwargs.get('Service', None)
ProcessName = kwargs.get('ProcessName', None)
ProcessID = kwargs.get('ProcessID', None)
KernelConnectionString = kwargs.get('KernelConnectionString', None)
SymbolsPath = kwargs.get('SymbolsPath', None)
IgnoreFirstChanceGardPage = kwargs.get('IgnoreFirstChanceGardPage', None)
IgnoreSecondChanceGardPage = kwargs.get('IgnoreSecondChanceGardPage', None)
quit = kwargs['Quit']
Tempfile = kwargs['Tempfile']
WinDbg = kwargs['WinDbg']
TempfilePid = kwargs['TempfilePid']
FaultOnEarlyExit = kwargs['FaultOnEarlyExit']
dbg = None
print("WindowsDebugEngineProcess_run")
# Hack for comtypes early version
comtypes._ole32.CoInitializeEx(None, comtypes.COINIT_APARTMENTTHREADED)
try:
_eventHandler = _DbgEventHandler()
_eventHandler.pid = None
_eventHandler.handlingFault = handlingFault
_eventHandler.handledFault = handledFault
_eventHandler.IgnoreFirstChanceGardPage = IgnoreFirstChanceGardPage
_eventHandler.IgnoreSecondChanceGardPage = IgnoreSecondChanceGardPage
_eventHandler.quit = quit
_eventHandler.Tempfile = Tempfile
_eventHandler.TempfilePid = TempfilePid
_eventHandler.FaultOnEarlyExit = FaultOnEarlyExit
if KernelConnectionString:
dbg = PyDbgEng.KernelAttacher(connection_string=KernelConnectionString,
event_callbacks_sink=_eventHandler,
output_callbacks_sink=_eventHandler,
symbols_path=SymbolsPath,
dbg_eng_dll_path=WinDbg)
elif CommandLine:
dbg = PyDbgEng.ProcessCreator(command_line=CommandLine,
follow_forks=True,
event_callbacks_sink=_eventHandler,
output_callbacks_sink=_eventHandler,
symbols_path=SymbolsPath,
dbg_eng_dll_path=WinDbg)
elif ProcessName:
pid = None
for x in range(10):
print("WindowsDebugEngineThread: Attempting to locate process by name...")
pid = GetProcessIdByName(ProcessName)
if pid is not None:
break
time.sleep(0.25)
if pid is None:
raise Exception("Error, unable to locate process '%s'" % ProcessName)
dbg = PyDbgEng.ProcessAttacher(pid,
event_callbacks_sink=_eventHandler,
output_callbacks_sink=_eventHandler,
symbols_path=SymbolsPath,
dbg_eng_dll_path=WinDbg)
elif ProcessID:
print("Attaching by pid: %d" % ProcessID)
pid = ProcessID
dbg = PyDbgEng.ProcessAttacher(pid, event_callbacks_sink=_eventHandler,
output_callbacks_sink=_eventHandler, symbols_path=SymbolsPath,
dbg_eng_dll_path=WinDbg)
elif Service:
# Make sure service is running
if win32serviceutil.QueryServiceStatus(Service)[1] != 4:
try:
# Some services auto-restart, if they do
# this call will fail.
win32serviceutil.StartService(Service)
except:
pass
while win32serviceutil.QueryServiceStatus(Service)[1] == 2:
time.sleep(0.25)
if win32serviceutil.QueryServiceStatus(Service)[1] != 4:
raise Exception("WindowsDebugEngine: Unable to start service!")
# Determine PID of service
scm = win32service.OpenSCManager(None, None, win32service.SC_MANAGER_ALL_ACCESS)
hservice = win32service.OpenService(scm, Service, 0xF01FF)
status = win32service.QueryServiceStatusEx(hservice)
pid = status["ProcessId"]
win32service.CloseServiceHandle(hservice)
win32service.CloseServiceHandle(scm)
dbg = PyDbgEng.ProcessAttacher(pid,
event_callbacks_sink=_eventHandler,
output_callbacks_sink=_eventHandler,
symbols_path=SymbolsPath,
dbg_eng_dll_path=WinDbg)
else:
raise Exception("Didn't find way to start debugger... bye bye!!")
_eventHandler.dbg = dbg
started.set()
dbg.event_loop_with_quit_event(quit)
finally:
if dbg is not None:
if dbg.idebug_client is not None:
dbg.idebug_client.EndSession(DbgEng.DEBUG_END_ACTIVE_TERMINATE)
dbg.idebug_client.Release()
elif dbg.idebug_control is not None:
dbg.idebug_control.EndSession(DbgEng.DEBUG_END_ACTIVE_TERMINATE)
dbg.idebug_control.Release()
dbg = None
comtypes._ole32.CoUninitialize()
def GetProcessIdByName(procname):
"""
Try and get pid for a process by name.
"""
ourPid = -1
procname = procname.lower()
try:
ourPid = win32api.GetCurrentProcessId()
except:
pass
pids = win32process.EnumProcesses()
for pid in pids:
if ourPid == pid:
continue
try:
hPid = win32api.OpenProcess(win32con.PROCESS_QUERY_INFORMATION | win32con.PROCESS_VM_READ, 0, pid)
try:
mids = win32process.EnumProcessModules(hPid)
for mid in mids:
name = str(win32process.GetModuleFileNameEx(hPid, mid))
if name.lower().find(procname) != -1:
return pid
finally:
win32api.CloseHandle(hPid)
except:
pass
return None
class WindowsDebugEngine(Monitor):
"""
Windows debugger agent. This debugger agent is based on the windbg engine and
supports the following features:
* User mode debugging
* Kernel mode debugging
* x86 and x64
* Symbols and symbol server
"""
def __init__(self, args):
Monitor.__init__(self, args)
print("WindowsDebugEngine::__init__()")
self.started = None
# Set at start of exception handling
self.handlingFault = None
# Set when collection finished
self.handledFault = None
self.crashInfo = None
self.fault = False
self.thread = None
self.tempfile = None
self.WinDbg = None
if args.has_key('CommandLine'):
self.CommandLine = str(args['CommandLine']).replace("'''", "")
else:
self.CommandLine = None
if args.has_key('Service'):
self.Service = str(args['Service']).replace("'''", "")
else:
self.Service = None
if args.has_key('ProcessName'):
self.ProcessName = str(args['ProcessName']).replace("'''", "")
else:
self.ProcessName = None
if args.has_key('ProcessID'):
self.ProcessID = int(args['ProcessID'].replace("'''", ""))
else:
self.ProcessID = None
if args.has_key('KernelConnectionString'):
self.KernelConnectionString = str(args['KernelConnectionString']).replace("'''", "")
else:
self.KernelConnectionString = None
if args.has_key('SymbolsPath'):
self.SymbolsPath = str(args['SymbolsPath']).replace("'''", "")
else:
self.SymbolsPath = "SRV*http://msdl.microsoft.com/download/symbols"
if args.has_key("StartOnCall"):
self.StartOnCall = True
self.OnCallMethod = str(args['StartOnCall']).replace("'''", "").lower()
else:
self.StartOnCall = False
if args.has_key("WinDbg"):
self.WinDbg = str(args['WinDbg']).replace("'''", "").lower()
if args.has_key("IgnoreFirstChanceGardPage"):
self.IgnoreFirstChanceGardPage = True
else:
self.IgnoreFirstChanceGardPage = False
if args.has_key("IgnoreSecondChanceGardPage"):
self.IgnoreSecondChanceGardPage = True
else:
self.IgnoreSecondChanceGardPage = False
if args.has_key("NoCpuKill"):
self.NoCpuKill = True
else:
self.NoCpuKill = False
if args.has_key("FaultOnEarlyExit"):
self.FaultOnEarlyExit = True
else:
self.FaultOnEarlyExit = False
if self.Service is None and self.CommandLine is None and self.ProcessName is None \
and self.KernelConnectionString is None and self.ProcessID is None:
raise PeachException(
"Unable to create WindowsDebugEngine, missing Service, or CommandLine, or ProcessName, or ProcessID, or KernelConnectionString parameter.")
self.handlingFault = None
self.handledFault = None
def _StartDebugger(self):
try:
if self.cpu_hq is not None:
win32pdh.RemoveCounter(self.cpu_counter_handle)
win32pdh.CloseQuery(self.cpu_hq)
self.cpu_hq = None
self.cpu_counter_handle = None
except:
pass
# Clear all our event handlers
self.started = Event()
self.quit = Event()
self.handlingFault = Event()
self.handledFault = Event()
self.crashInfo = None
self.fault = False
self.pid = None
self.cpu_process = None
self.cpu_path = None
self.cpu_hq = None
self.cpu_counter_handle = None
(fd, self.tempfile) = tempfile.mkstemp()
os.close(fd)
(fd, self.tempfilepid) = tempfile.mkstemp()
os.close(fd)
try:
os.unlink(self.tempfile)
except:
pass
self.thread = Process(group=None, target=WindowsDebugEngineProcess_run, kwargs={
'Started': self.started,
'HandlingFault': self.handlingFault,
'HandledFault': self.handledFault,
'CommandLine': self.CommandLine,
'Service': self.Service,
'ProcessName': self.ProcessName,
'ProcessID': self.ProcessID,
'KernelConnectionString': self.KernelConnectionString,
'SymbolsPath': self.SymbolsPath,
'IgnoreFirstChanceGardPage': self.IgnoreFirstChanceGardPage,
'IgnoreSecondChanceGardPage': self.IgnoreSecondChanceGardPage,
'Quit': self.quit,
'Tempfile': self.tempfile,
'WinDbg': self.WinDbg,
'TempfilePid': self.tempfilepid,
'FaultOnEarlyExit': self.FaultOnEarlyExit
})
# Kick off our thread:
self.thread.start()
# Wait it...!
self.started.wait()
if not self.NoCpuKill:
# Make sure we wait at least 1 second
# for program to startup. Needed with new
# CPU killing k0de.
time.sleep(1)
def _StopDebugger(self, force=False):
if force == False and self.handledFault is not None and (
self.handlingFault.is_set() and not self.handledFault.is_set()):
print("_StopDebugger(): Not killing process due to fault handling")
return
print("_StopDebugger() - force:", force)
if self.thread is not None and self.thread.is_alive():
self.quit.set()
self.started.clear()
self.thread.join(5)
if force == False and self.handledFault is not None and (
self.handlingFault.is_set() and not self.handledFault.is_set()):
print("_StopDebugger(): Not killing process due to fault handling - 2")
return
if self.thread.is_alive():
# 1. Terminate child process
if self.pid is not None:
psutil.Process(self.pid).terminate()
# 2. Terminate debugger process
self.thread.terminate()
# 3. Join process to avoid ZOMBIES!
self.thread.join()
time.sleep(0.25) # Take a breath
elif self.thread is not None:
# quit could be set by event handler now
self.thread.join()
self.thread = None
def _IsDebuggerAlive(self):
return self.thread and self.thread.is_alive()
def OnTestStarting(self):
"""
Called right before start of test.
"""
if not self.StartOnCall and not self._IsDebuggerAlive():
self._StartDebugger()
elif self.StartOnCall:
self._StopDebugger()
def PublisherCall(self, method):
if not self.StartOnCall:
return None
if self.OnCallMethod == method.lower():
self._StartDebugger()
return True
if self.OnCallMethod + "_isrunning" == method.lower():
# Program has stopped if we are handling a fault.
if self.handlingFault.is_set() or self.handledFault.is_set():
return False
if not self.quit.is_set():
if self.pid is None:
fd = open(self.tempfilepid, "rb+")
pid = fd.read()
fd.close()
if len(pid) != 0:
self.pid = int(pid)
try:
os.unlink(self.tempfilepid)
except:
pass
if self.NoCpuKill == False and self.pid is not None:
try:
# Check and see if the CPU utilization is low
cpu = psutil.Process(self.pid).get_cpu_percent(interval=1.0)
if cpu is not None and cpu < 1.0:
cpu = psutil.Process(self.pid).get_cpu_percent(interval=1.0)
if cpu is not None and cpu < 1.0 and not self.quit.is_set():
print("PublisherCall: Stopping debugger, CPU: %f" % cpu)
self._StopDebugger()
return False
except psutil.NoSuchProcess as e:
pass
return not self.quit.is_set()
return None
def OnTestFinished(self):
if not self.StartOnCall or not self._IsDebuggerAlive():
return
self._StopDebugger()
def GetMonitorData(self):
"""
Get any monitored data.
"""
print("GetMonitorData(): Loading from file")
fd = open(self.tempfile, "rb+")
self.crashInfo = pickle.loads(fd.read())
fd.close()
try:
os.unlink(self.tempfile)
except:
pass
print("GetMonitorData(): Got it!")
if self.crashInfo is not None:
ret = self.crashInfo
self.crashInfo = None
return ret
return None
def RedoTest(self):
"""
Returns True if the current iteration should be repeated
"""
if self.handlingFault is None:
return False
if self.thread and self.thread.is_alive():
time.sleep(0.15)
if not self.handlingFault.is_set():
return False
print("RedoTest: Waiting for self.handledFault...")
t = 60.0 * 3
self.handledFault.wait(timeout=t)
if not self.handledFault.is_set():
print("RedoTest: Timmed out waiting for fault information")
print("RedoTest: Killing debugger and target")
self._StopDebugger(True)
_DbgEventHandler.TakeStackTrace = False
print("RedoTest: Attempting to re-run iteration")
return True
return False
def DetectedFault(self):
"""
Check if a fault was detected.
"""
if self.FaultOnEarlyExit and (self.thread is None or not self.thread.is_alive()) and \
(self.handledFault is None or not self.handledFault.is_set()):
print(">>>>>> RETURNING EARLY EXIT FAULT <<<<<<<<<")
return True
if self.handlingFault is None:
print("DetectedFault: Agent was re-set, returning false")
return False
if self.thread and self.thread.is_alive():
time.sleep(0.15)
if not self.handlingFault.is_set():
return False
print(">>>>>> RETURNING FAULT <<<<<<<<<")
return True
def OnFault(self):
"""
Called when a fault was detected.
"""
self._StopDebugger()
def OnShutdown(self):
"""
Called when Agent is shutting down.
"""
self._StopDebugger()
except:
# Only complain on Windows platforms.
#if sys.platform == 'win32':
# print "Warning: Windows debugger failed to load: ", sys.exc_info()
pass
try:
import vtrace, envi
import threading
class PeachNotifier(vtrace.Notifier):
def __init__(self):
pass
def notify(self, event, trace):
print("Got event: %d from pid %d, signal: %d" % (event, trace.getPid(), trace.getMeta("PendingSignal")))
UnixDebugger.handlingFault.set()
buff = ""
addr = None
# Stacktrace
buff += "\nStacktrace:\n"
buff += " [ PC ] [ Frame ] [ Location ]\n"
for frame in trace.getStackTrace():
buff += " 0x%.8x 0x%.8x %s\n" % (frame[0], frame[1], self.bestName(trace, frame[0]))
if addr is None:
addr = frame[0]
# Registers
buff += "\nRegisters:\n"
regs = trace.getRegisters()
rnames = regs.keys()
rnames.sort()
for r in rnames:
buff += " %s 0x%.8x\n" % (r, regs[r])
# Dissassembly
arch = trace.getMeta("Architecture")
arch = envi.getArchModule(arch)
mem = trace.readMemory(addr - 256, 512)
addrStart = addr - 256
offset = 0
count = 0
buff += "\nDisassembly:\n"
ops = []
while offset < 500 and count < 200:
va = addrStart + offset
op = arch.makeOpcode(mem[offset:])
if va == addr:
for i in ops[-20:]:
buff += i
buff += ">>>0x%.8x: %s\n" % (va, arch.reprOpcode(op, va=va))
count = 190
elif va < addr:
ops.append(" 0x%.8x: %s\n" % (va, arch.reprOpcode(op, va=va)))
else:
buff += " 0x%.8x: %s\n" % (va, arch.reprOpcode(op, va=va))
offset += len(op)
count += 1
print(buff)
UnixDebugger.lock.acquire()
UnixDebugger.crashInfo = {'DebuggerOutput.txt': buff, 'Bucket': "AV_at_%d" % addr}
UnixDebugger.fault = True
UnixDebugger.lock.release()
UnixDebugger.handledFault.set()
def bestName(self, trace, address):
"""
Return a string representing the best known name for
the given address
"""
if not address:
return "NULL"
match = trace.getSymByAddr(address)
if match is not None:
if int(match) == address:
return repr(match)
else:
return "%s+%d" % (repr(match), address - int(match))
map = trace.getMap(address)
if map:
return map[3]
return "Who knows?!?!!?"
class _TraceThread(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
def run(self):
self.trace = vtrace.getTrace()
self.trace.registerNotifier(vtrace.NOTIFY_SIGNAL, PeachNotifier())
self.trace.execute(self._command + " " + self._params)
UnixDebugger.started.set()
self.trace.run()
class UnixDebugger(Monitor):
"""
Unix GDB monitor. This debugger monitor uses the gdb
debugger via pygdb wrapper. Tested under Linux and OS X.
* Collect core files
* User mode debugging
* Capturing stack trace, registers, etc
* Symbols is available
"""
def __init__(self, args):
UnixDebugger.quit = threading.Event()
UnixDebugger.started = threading.Event()
UnixDebugger.handlingFault = threading.Event()
UnixDebugger.handledFault = threading.Event()
UnixDebugger.lock = threading.Lock()
UnixDebugger.crashInfo = None
UnixDebugger.fault = False
self.thread = None
if args.has_key('Command'):
self._command = str(args['Command']).replace("'''", "\"")
self._params = str(args['Params']).replace("'''", "\"")
self._pid = None
elif args.has_key('ProcessName'):
self._command = None
self._params = None
self._pid = self.GetProcessIdByName(str(args['ProcessName']).replace("'''", "\""))
else:
raise Exception("Unable to create UnixGdb! Error in params!")
if args.has_key("StartOnCall"):
self.StartOnCall = True
self.OnCallMethod = str(args['StartOnCall']).replace("'''", "").lower()
else:
self.StartOnCall = False
def PublisherCall(self, method):
if not self.StartOnCall:
return
if self.OnCallMethod == method.lower():
self._StartDebugger()
def _StartDebugger(self):
UnixDebugger.quit.clear()
UnixDebugger.started.clear()
UnixDebugger.handlingFault.clear()
UnixDebugger.handledFault.clear()
UnixDebugger.fault = False
UnixDebugger.crashInfo = None
self.thread = _TraceThread()
self.thread._command = self._command
self.thread._params = self._params
self.thread._pid = self._pid
self.thread.start()
UnixDebugger.started.wait()
time.sleep(2) # Let things spin up!
def _StopDebugger(self):
if self.thread is not None:
if self.thread.isAlive():
UnixDebugger.quit.set()
UnixDebugger.started.clear()
self.thread.trace.kill()
self.thread.join()
time.sleep(0.25) # Take a breath
self.thread.trace.release() # FIX
self.thread.trace.releaseMemory() # FIX fd
def _IsDebuggerAlive(self):
return self.thread is not None and self.thread.isAlive()
def OnTestStarting(self):
"""