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Windows: Try to fix backtraces in crash handling always only showing one entry on Windows 9x

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This commit is contained in:
UnknownShadow200 2023-09-28 22:15:08 +10:00
parent 899b66ae13
commit 000a74932b
2 changed files with 15 additions and 6 deletions
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2
misc/dreamcast/Makefile
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@ -24,7 +24,7 @@ $(BUILD_DIR)/%.o: third_party/bearssl/src/%.c
$(TARGET).elf: $(OBJS)
kos-cc $< -o $@
kos-cc $^ -o $@
$(TARGET).bin: $(TARGET).elf
sh-elf-objcopy -R .stack -O binary $(TARGET).elf $(TARGET).bin

19
src/Logger.c
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@ -273,10 +273,20 @@ static void DumpFrame(cc_string* trace, void* addr) {
*-------------------------------------------------------Backtracing-------------------------------------------------------*
*#########################################################################################################################*/
#if defined CC_BUILD_WIN
/* This callback function is used so stack Walking works using StackWalk properly on Windows 9x: */
/* - on Windows 9x process ID is passed instead of process handle as the "process" argument */
/* - the SymXYZ functions expect a process ID on Windows 9x, so that works fine */
/* - if NULL is passed as the "ReadMemory" argument, the default callback using ReadProcessMemory is used */
/* - however, ReadProcessMemory expects a process handle, and so that will fail since it's given a process ID */
/* So to work around this, instead manually call ReadProcessMemory with the current process handle */
static BOOL __stdcall ReadMemCallback(HANDLE process, DWORD_PTR baseAddress, PVOID buffer, DWORD size, PDWORD numBytesRead) {
return ReadProcessMemory(GetCurrentProcess(), (LPCVOID)baseAddress, buffer, size, numBytesRead);
}
static int GetFrames(CONTEXT* ctx, cc_uintptr* addrs, int max) {
STACKFRAME frame = { 0 };
HANDLE process, thread;
int count, type;
HANDLE thread;
frame.AddrPC.Mode = AddrModeFlat;
frame.AddrFrame.Mode = AddrModeFlat;
@ -296,12 +306,11 @@ static int GetFrames(CONTEXT* ctx, cc_uintptr* addrs, int max) {
/* Always available after XP, so use that */
return RtlCaptureStackBackTrace(0, max, (void**)addrs, NULL);
#endif
process = GetCurrentProcess();
thread = GetCurrentThread();
thread = GetCurrentThread();
for (count = 0; count < max; count++)
{
if (!StackWalk(type, process, thread, &frame, ctx, NULL, SymFunctionTableAccess, SymGetModuleBase, NULL)) break;
if (!StackWalk(type, curProcess, thread, &frame, ctx, ReadMemCallback, SymFunctionTableAccess, SymGetModuleBase, NULL)) break;
if (!frame.AddrFrame.Offset) break;
addrs[count] = frame.AddrPC.Offset;
}
@ -1029,7 +1038,7 @@ void Logger_Hook(void) {
DynamicLib_LoadAll(&imagehlp, funcs, Array_Elems(funcs), &lib);
/* Windows 9x requires process IDs instead - see old DBGHELP docs */
/* https://documentation.help/DbgHelp/documentation.pdf */
/* https://documentation.help/DbgHelp/documentation.pdf */
osInfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFOA);
osInfo.dwPlatformId = 0;
GetVersionExA(&osInfo);