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Print stack trace on program crash

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This commit is contained in:
f4exb
2026-02-13 21:46:22 +01:00
parent 3ecf974f88
commit 3ac0dabaa2
5 changed files with 307 additions and 82 deletions
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app/crashhandlerwin.cpp
+116 -82
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@@ -38,6 +38,102 @@ static HWND hExitButton;
static qtwebapp::LoggerWithFile *crashLogger;
static void appendStackTrace(char *&reportBufferPtr, int &reportBufferRemaining)
{
STACKFRAME64 stack;
CONTEXT context;
HANDLE process;
DWORD64 displacement;
ULONG frame;
BOOL symInit;
char symName[(MAX_PATH * sizeof(TCHAR))];
char storage[sizeof(IMAGEHLP_SYMBOL64) + (sizeof(symName))];
IMAGEHLP_SYMBOL64* symbol;
RtlCaptureContext(&context);
memset(&stack, 0, sizeof(STACKFRAME64));
#if defined(_AMD64_)
stack.AddrPC.Offset = context.Rip;
stack.AddrPC.Mode = AddrModeFlat;
stack.AddrStack.Offset = context.Rsp;
stack.AddrStack.Mode = AddrModeFlat;
stack.AddrFrame.Offset = context.Rbp;
stack.AddrFrame.Mode = AddrModeFlat;
#else
stack.AddrPC.Offset = context.Eip;
stack.AddrPC.Mode = AddrModeFlat;
stack.AddrStack.Offset = context.Esp;
stack.AddrStack.Mode = AddrModeFlat;
stack.AddrFrame.Offset = context.Ebp;
stack.AddrFrame.Mode = AddrModeFlat;
#endif
displacement = 0;
process = GetCurrentProcess();
symInit = SymInitialize(process, "plugins", TRUE);
symbol = (IMAGEHLP_SYMBOL64*) storage;
if (!symInit)
{
int written = snprintf(reportBufferPtr, reportBufferRemaining, "(symbol init failed)\r\n");
if (written > 0)
{
reportBufferPtr += written;
reportBufferRemaining -= written;
}
return;
}
for (frame = 0; reportBufferRemaining > 0; frame++)
{
BOOL result = StackWalk(IMAGE_FILE_MACHINE_AMD64,
process,
GetCurrentThread(),
&stack,
&context,
NULL,
SymFunctionTableAccess64,
SymGetModuleBase64,
NULL);
if (result)
{
symbol->SizeOfStruct = sizeof(storage);
symbol->MaxNameLength = sizeof(symName);
BOOL symResult = SymGetSymFromAddr64(process, (ULONG64)stack.AddrPC.Offset, &displacement, symbol);
if (symResult) {
UnDecorateSymbolName(symbol->Name, (PSTR)symName, sizeof(symName), UNDNAME_COMPLETE);
}
int written = snprintf(
reportBufferPtr,
reportBufferRemaining,
"%02u 0x%p %s\r\n",
frame,
stack.AddrPC.Offset,
symResult ? symbol->Name : "Unknown"
);
if (written > 0)
{
if (written <= reportBufferRemaining)
{
reportBufferPtr += written;
reportBufferRemaining -= written;
}
else
{
reportBufferPtr += reportBufferRemaining;
reportBufferRemaining = 0;
}
}
}
else
{
break;
}
}
}
static void ScaleWindow(HWND wnd, int x, int y, int w, int h)
{
int dpi = GetDpiForWindow(wnd);
@@ -273,88 +369,7 @@ static LONG crashHandler(struct _EXCEPTION_POINTERS *ExceptionInfo)
reportBufferRemaining -= written;
// Create stack trace
STACKFRAME64 stack;
CONTEXT context;
HANDLE process;
DWORD64 displacement;
ULONG frame;
BOOL symInit;
char symName[(MAX_PATH * sizeof(TCHAR))];
char storage[sizeof(IMAGEHLP_SYMBOL64) + (sizeof(symName))];
IMAGEHLP_SYMBOL64* symbol;
RtlCaptureContext(&context);
memset(&stack, 0, sizeof(STACKFRAME64));
#if defined(_AMD64_)
stack.AddrPC.Offset = context.Rip;
stack.AddrPC.Mode = AddrModeFlat;
stack.AddrStack.Offset = context.Rsp;
stack.AddrStack.Mode = AddrModeFlat;
stack.AddrFrame.Offset = context.Rbp;
stack.AddrFrame.Mode = AddrModeFlat;
#else
stack.AddrPC.Offset = context.Eip;
stack.AddrPC.Mode = AddrModeFlat;
stack.AddrStack.Offset = context.Esp;
stack.AddrStack.Mode = AddrModeFlat;
stack.AddrFrame.Offset = context.Ebp;
stack.AddrFrame.Mode = AddrModeFlat;
#endif
displacement = 0;
process = GetCurrentProcess();
symInit = SymInitialize(process, "plugins", TRUE);
symbol = (IMAGEHLP_SYMBOL64*) storage;
for (frame = 0; reportBufferRemaining > 0; frame++)
{
BOOL result = StackWalk(IMAGE_FILE_MACHINE_AMD64,
process,
GetCurrentThread(),
&stack,
&context,
NULL,
SymFunctionTableAccess64,
SymGetModuleBase64,
NULL);
if (result)
{
symbol->SizeOfStruct = sizeof(storage);
symbol->MaxNameLength = sizeof(symName);
BOOL symResult = SymGetSymFromAddr64(process, (ULONG64)stack.AddrPC.Offset, &displacement, symbol);
if (symResult) {
UnDecorateSymbolName(symbol->Name, (PSTR)symName, sizeof(symName), UNDNAME_COMPLETE);
}
written = snprintf(
reportBufferPtr,
reportBufferRemaining,
"%02u 0x%p %s\r\n",
frame,
stack.AddrPC.Offset,
symResult ? symbol->Name : "Unknown"
);
if (written > 0)
{
if (written <= reportBufferRemaining)
{
reportBufferPtr += written;
reportBufferRemaining -= written;
}
else
{
reportBufferPtr += reportBufferRemaining;
reportBufferRemaining = 0;
}
}
}
else
{
break;
}
}
appendStackTrace(reportBufferPtr, reportBufferRemaining);
// Append log file
if (crashLogger)
@@ -432,3 +447,22 @@ void installCrashHandler(qtwebapp::LoggerWithFile *logger)
crashLogger = logger;
SetUnhandledExceptionFilter(crashHandler);
}
void logWindowsStackTrace()
{
const int reportBufferSize = 64 * 1024;
char *reportBuffer = new char[reportBufferSize];
char *reportBufferPtr = reportBuffer;
int reportBufferRemaining = reportBufferSize;
int written = snprintf(reportBufferPtr, reportBufferRemaining, "Stack trace (DbgHelp):\r\n");
if (written > 0)
{
reportBufferPtr += written;
reportBufferRemaining -= written;
}
appendStackTrace(reportBufferPtr, reportBufferRemaining);
qCritical("%s", reportBuffer);
delete[] reportBuffer;
}