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//
// Copyright 2014 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// test_utils_win32.cpp: Implementation of OS-specific functions for Win32 (Windows)
#ifdef UNSAFE_BUFFERS_BUILD
# pragma allow_unsafe_buffers
#endif
#include "util/test_utils.h"
#include <windows.h>
#include <array>
#include "util/windows/third_party/StackWalker/src/StackWalker.h"
namespace angle
{
namespace
{
static const struct
{
const char *name;
const DWORD code;
} kExceptions[] = {
#define _(E) \
{ \
# E, E \
}
_(EXCEPTION_ACCESS_VIOLATION),
_(EXCEPTION_BREAKPOINT),
_(EXCEPTION_INT_DIVIDE_BY_ZERO),
_(EXCEPTION_STACK_OVERFLOW),
#undef _
};
class CustomStackWalker : public StackWalker
{
public:
CustomStackWalker() {}
~CustomStackWalker() override {}
void OnCallstackEntry(CallstackEntryType eType, CallstackEntry &entry) override
{
char buffer[STACKWALK_MAX_NAMELEN];
size_t maxLen = _TRUNCATE;
if ((eType != lastEntry) && (entry.offset != 0))
{
if (entry.name[0] == 0)
strncpy_s(entry.name, STACKWALK_MAX_NAMELEN, "(function-name not available)",
_TRUNCATE);
if (entry.undName[0] != 0)
strncpy_s(entry.name, STACKWALK_MAX_NAMELEN, entry.undName, _TRUNCATE);
if (entry.undFullName[0] != 0)
strncpy_s(entry.name, STACKWALK_MAX_NAMELEN, entry.undFullName, _TRUNCATE);
if (entry.lineFileName[0] == 0)
{
strncpy_s(entry.lineFileName, STACKWALK_MAX_NAMELEN, "(filename not available)",
_TRUNCATE);
if (entry.moduleName[0] == 0)
strncpy_s(entry.moduleName, STACKWALK_MAX_NAMELEN,
"(module-name not available)", _TRUNCATE);
_snprintf_s(buffer, maxLen, " %s - %p (%s): %s\n", entry.name,
reinterpret_cast<void *>(entry.offset), entry.moduleName,
entry.lineFileName);
}
else
_snprintf_s(buffer, maxLen, " %s (%s:%d)\n", entry.name, entry.lineFileName,
entry.lineNumber);
buffer[STACKWALK_MAX_NAMELEN - 1] = 0;
printf("%s", buffer);
OutputDebugStringA(buffer);
}
}
};
void PrintBacktrace(CONTEXT *c)
{
printf("Backtrace:\n");
OutputDebugStringA("Backtrace:\n");
CustomStackWalker sw;
sw.ShowCallstack(GetCurrentThread(), c);
}
LONG WINAPI StackTraceCrashHandler(EXCEPTION_POINTERS *e)
{
const DWORD code = e->ExceptionRecord->ExceptionCode;
printf("\nCaught exception %lu", code);
for (size_t i = 0; i < ArraySize(kExceptions); i++)
{
if (kExceptions[i].code == code)
{
printf(" %s", kExceptions[i].name);
}
}
printf("\n");
PrintBacktrace(e->ContextRecord);
// Exit NOW. Don't notify other threads, don't call anything registered with atexit().
_exit(1);
// The compiler wants us to return something. This is what we'd do if we didn't _exit().
return EXCEPTION_EXECUTE_HANDLER;
}
CrashCallback *gCrashHandlerCallback;
LONG WINAPI CrashHandler(EXCEPTION_POINTERS *e)
{
if (gCrashHandlerCallback)
{
(*gCrashHandlerCallback)();
}
return StackTraceCrashHandler(e);
}
} // namespace
void SetLowPriorityProcess()
{
::SetPriorityClass(::GetCurrentProcess(), BELOW_NORMAL_PRIORITY_CLASS);
}
bool StabilizeCPUForBenchmarking()
{
if (::SetThreadAffinityMask(::GetCurrentThread(), 1) == 0)
{
return false;
}
if (::SetPriorityClass(::GetCurrentProcess(), REALTIME_PRIORITY_CLASS) == FALSE)
{
return false;
}
if (::SetThreadPriority(::GetCurrentThread(), THREAD_PRIORITY_TIME_CRITICAL) == FALSE)
{
return false;
}
return true;
}
void PrintStackBacktrace()
{
CONTEXT context;
ZeroMemory(&context, sizeof(CONTEXT));
RtlCaptureContext(&context);
PrintBacktrace(&context);
}
void InitCrashHandler(CrashCallback *callback)
{
if (callback)
{
gCrashHandlerCallback = callback;
}
SetUnhandledExceptionFilter(CrashHandler);
}
void TerminateCrashHandler()
{
gCrashHandlerCallback = nullptr;
SetUnhandledExceptionFilter(nullptr);
}
int NumberOfProcessors()
{
// A portable implementation could probably use GetLogicalProcessorInformation
return ::GetActiveProcessorCount(ALL_PROCESSOR_GROUPS);
}
} // namespace angle
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