And*_*zos 1 c++ windows winapi c++17
有什么方法可以获取.what()未捕获的 C++ 异常,同时还安装了 Windows 未处理的异常过滤器?
为了演示,以下程序...
#include <windows.h>
#include <iostream>
static LONG WINAPI WindowsExceptionHandler(LPEXCEPTION_POINTERS ep) {
std::cerr << "FOO" << std::endl;
return EXCEPTION_EXECUTE_HANDLER;
}
void TerminateHandler() {
std::exception_ptr exception_ptr = std::current_exception();
try {
if (exception_ptr) std::rethrow_exception(exception_ptr);
} catch (const std::exception& e) {
std::cerr << e.what() << std::endl;
}
}
int main() {
SetUnhandledExceptionFilter(WindowsExceptionHandler);
std::set_terminate(TerminateHandler);
throw std::runtime_error("BAR");
}
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输出:
FOO
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我希望它输出BAR或者FOOBAR
注释掉SetUnhandledExceptionFilter使其工作(但这是不可接受的,因为它不会捕获其他 Windows 异常类型)。
显然以某种方式SetUnhandledExceptionFilter覆盖std::set_terminate?
所有 C++ 异常内部都使用throw关键字。它内部使用_CxxThrowException此 api 调用RaiseException函数并0xE06D7363就地dwExceptionCode。因此,SetUnhandledExceptionFilter如果想用TerminateHandler.
g_prevlpTopLevelExceptionFilter = SetUnhandledExceptionFilter(WindowsExceptionHandler);
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和
if (ExceptionRecord->ExceptionCode == 0xE06D7363) {
return g_prevlpTopLevelExceptionFilter(ep);
}
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LPTOP_LEVEL_EXCEPTION_FILTER g_prevlpTopLevelExceptionFilter;
LONG WINAPI WindowsExceptionHandler(LPEXCEPTION_POINTERS ep) {
PEXCEPTION_RECORD ExceptionRecord = ep->ExceptionRecord;
printf("%s: %x at %p", __FUNCTION__,
ExceptionRecord->ExceptionCode, ExceptionRecord->ExceptionAddress);
if (ULONG NumberParameters = ExceptionRecord->NumberParameters)
{
printf(" { ");
PULONG_PTR ExceptionInformation = ExceptionRecord->ExceptionInformation;
do
{
printf(" %p", (void*)*ExceptionInformation++);
} while (--NumberParameters);
printf(" } ");
}
printf("\n");
if (ExceptionRecord->ExceptionCode == 0xE06D7363) {
return g_prevlpTopLevelExceptionFilter(ep);
}
return EXCEPTION_EXECUTE_HANDLER;
}
void TerminateHandler() {
MessageBoxW(0, 0, __FUNCTIONW__, MB_ICONWARNING);
exit(-1);
}
void main() {
g_prevlpTopLevelExceptionFilter =
SetUnhandledExceptionFilter(WindowsExceptionHandler);
set_terminate(TerminateHandler);
throw "888";
}
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