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cStack.py
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cStack.py
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import re;
from cStackFrame import cStackFrame;
from dxBugIdConfig import dxBugIdConfig;
class cStack(object):
def __init__(oStack, asCdbLines):
oStack.asCdbLines = asCdbLines;
oStack.aoFrames = [];
oStack.bPartialStack = True;
oStack.uHashFramesCount = dxBugIdConfig["uStackHashFramesCount"];
def fCreateAndAddStackFrame(oStack,
uNumber,
sCdbSymbolOrAddress,
uInstructionPointer, uReturnAddress,
uAddress,
sUnloadedModuleFileName,
oModule, uModuleOffset,
oFunction, uFunctionOffset,
sSourceFilePath = None, uSourceFileLineNumber = None,
):
# frames must be created in order:
assert uNumber == len(oStack.aoFrames), \
"Unexpected frame number %d vs %d" % (uNumber, len(oStack.aoFrames));
uMaxStackFramesCount = dxBugIdConfig["uMaxStackFramesCount"];
oStackFrame = cStackFrame(
oStack,
uNumber,
sCdbSymbolOrAddress,
uInstructionPointer, uReturnAddress,
uAddress,
sUnloadedModuleFileName,
oModule, uModuleOffset,
oFunction, uFunctionOffset,
sSourceFilePath, uSourceFileLineNumber,
);
oStack.aoFrames.append(oStackFrame);
@classmethod
def foCreateFromAddress(cStack, oCdbWrapper, pAddress, uSize):
# Get information on all modules in the current process
doModules_by_sCdbId = oCdbWrapper.fdoGetModulesByCdbIdForCurrentProcess();
if not oCdbWrapper.bCdbRunning: return None;
# Create the stack object
uStackFramesCount = min(dxBugIdConfig["uMaxStackFramesCount"], uSize);
asStack = oCdbWrapper.fasGetStack("dps 0x%X L0x%X" % (pAddress, uStackFramesCount + 1));
if not asStack: return None;
oStack = cStack(asStack);
# Here are some lines you might expect to parse:
# |TODO put something here...
uFrameNumber = 0;
uInstructionPointer = None; # Unknown for first frame.
for sLine in asStack:
if uFrameNumber == uStackFramesCount:
break;
oMatch = re.match(r"^\s*%s\s*$" % (
r"[0-9A-F`]+" r"\s+" # stack_address whitespace
r"([0-9A-F`]+)" r"\s+" # (return_address) whitespace
r"(.+?)" # (Symbol or address)
r"(?: \[(.+) @ (\d+)\])?" # [ "[" (source_file_path) " @ " (line_number) "]" ]
), sLine, re.I);
assert oMatch, "Unknown stack output: %s" % sLine;
sReturnAddress, sCdbSymbolOrAddress, sSourceFilePath, sSourceFileLineNumber = oMatch.groups();
(
uAddress,
sUnloadedModuleFileName, oModule, uModuleOffset,
oFunction, uFunctionOffset
) = oCdbWrapper.ftxSplitSymbolOrAddress(sCdbSymbolOrAddress, doModules_by_sCdbId);
uSourceFileLineNumber = sSourceFileLineNumber and long(sSourceFileLineNumber);
uReturnAddress = sReturnAddress and long(sReturnAddress.replace("`", ""), 16);
oStack.fCreateAndAddStackFrame(
uNumber = uFrameNumber,
sCdbSymbolOrAddress = sCdbSymbolOrAddress,
uInstructionPointer = uInstructionPointer,
uReturnAddress = uReturnAddress,
uAddress = uAddress,
sUnloadedModuleFileName = sUnloadedModuleFileName,
oModule = oModule, uModuleOffset = uModuleOffset,
oFunction = oFunction, uFunctionOffset = uFunctionOffset,
sSourceFilePath = sSourceFilePath, uSourceFileLineNumber = uSourceFileLineNumber,
);
if uReturnAddress: # Last frame's return address is next frame's instruction pointer.
uInstructionPointer = uReturnAddress;
uFrameNumber += 1;
oStack.bPartialStack = uFrameNumber == uStackFramesCount;
return oStack;
@classmethod
def foCreate(cStack, oCdbWrapper, uStackFramesCount):
# Get information on all modules in the current process
doModules_by_sCdbId = oCdbWrapper.fdoGetModulesByCdbIdForCurrentProcess();
if not oCdbWrapper.bCdbRunning: return None;
# First frame's instruction pointer is exactly that:
uInstructionPointer = oCdbWrapper.fuGetValue("@$ip");
# Create the stack object
asStack = oCdbWrapper.fasGetStack("kn 0x%X" % (uStackFramesCount + 1));
if not asStack: return None;
oStack = cStack(asStack);
sHeader = asStack.pop(0);
assert re.sub(r"\s+", " ", sHeader.strip()) in ["# ChildEBP RetAddr", "# Child-SP RetAddr Call Site", "Could not allocate memory for stack trace"], \
"Unknown stack header: %s" % repr(sHeader);
# Here are some lines you might expect to parse:
# |00 (Inline) -------- chrome_child!WTF::RawPtr<blink::Document>::operator*+0x11
# |03 0082ec08 603e2568 chrome_child!blink::XMLDocumentParser::startElementNs+0x105
# |33 0082fb50 0030d4ba chrome!wWinMain+0xaa
# |23 0a8cc578 66629c9b 0x66cf592a
# |13 0a8c9cc8 63ea124e IEFRAME!Ordinal231+0xb3c83
# |36 0a19c854 77548e71 MSHTML+0x8d45e
# |1b 0000008c`53b2c650 00007ffa`4631cfba ntdll!KiUserCallbackDispatcherContinue
# |22 00000040`0597b770 00007ffa`36ddc0e3 0x40`90140fc3
# |WARNING: Frame IP not in any known module. Following frames may be wrong.
# |WARNING: Stack unwind information not available. Following frames may be wrong.
# |Could not allocate memory for stack trace
uFrameNumber = 0;
for sLine in asStack:
if not re.match(r"^(?:%s)$" % "|".join([
# These warnings and errors are ignored:
r"WARNING: Frame IP not in any known module\. Following frames may be wrong\.",
r"WARNING: Stack unwind information not available\. Following frames may be wrong\.",
r"\*\*\* ERROR: Module load completed but symbols could not be loaded for .*",
r"\*\*\* WARNING: Unable to verify checksum for .*",
r"Unable to read dynamic function table list head",
]), sLine):
if uFrameNumber == uStackFramesCount:
break;
oMatch = re.match(r"^\s*%s\s*$" % (
r"([0-9A-F]+)" r"\s+" # (frame_number) whitespace
r"(?:" # either {
r"[0-9A-F`]+" r"\s+" # stack_address whitespace
r"([0-9A-F`]+)" r"\s+" # (return_address) whitespace
r"|" # } or {
r"\(Inline(?: Function)?\)" r"\s+" # "(Inline" [" Function"] ")" whitespace
r"\-{8}(?:`\-{8})?" r"\s+" # "--------" [`--------] whitespace
r")" # }
r"(.+?)" # Symbol or address
r"(?: \[(.+) @ (\d+)\])?" # [ "[" (source_file_path) " @ " (line_number) "]" ]
), sLine, re.I);
assert oMatch, "Unknown stack output: %s\r\n%s" % (repr(sLine), "\r\n".join(asStack));
(sFrameNumber, sReturnAddress, sCdbSymbolOrAddress, sSourceFilePath, sSourceFileLineNumber) = oMatch.groups();
assert uFrameNumber == int(sFrameNumber, 16), "Unexpected frame number: %s vs %d" % (sFrameNumber, uFrameNumber);
(
uAddress,
sUnloadedModuleFileName, oModule, uModuleOffset,
oFunction, uFunctionOffset
) = oCdbWrapper.ftxSplitSymbolOrAddress(sCdbSymbolOrAddress, doModules_by_sCdbId);
uSourceFileLineNumber = sSourceFileLineNumber and long(sSourceFileLineNumber);
uReturnAddress = sReturnAddress and long(sReturnAddress.replace("`", ""), 16);
oStack.fCreateAndAddStackFrame(
uNumber = uFrameNumber,
sCdbSymbolOrAddress = sCdbSymbolOrAddress,
uInstructionPointer = uInstructionPointer,
uReturnAddress = uReturnAddress,
uAddress = uAddress,
sUnloadedModuleFileName = sUnloadedModuleFileName,
oModule = oModule, uModuleOffset = uModuleOffset,
oFunction = oFunction, uFunctionOffset = uFunctionOffset,
sSourceFilePath = sSourceFilePath, uSourceFileLineNumber = uSourceFileLineNumber,
);
if uReturnAddress: # Last frame's return address is next frame's instruction pointer.
uInstructionPointer = uReturnAddress;
uFrameNumber += 1;
oStack.bPartialStack = uFrameNumber == uStackFramesCount;
return oStack;