Function exception_filter

rpcs3/util/Thread.cpp:1803–1900

}

static LONG exception_filter(PEXCEPTION_POINTERS pExp) noexcept
{
	std::string msg = fmt::format("Unhandled Win32 exception 0x%08X.\n", pExp->ExceptionRecord->ExceptionCode);

	if (pExp->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION)
	{
		const auto cause =
			pExp->ExceptionRecord->ExceptionInformation[0] == 8 ? "executing" :
			pExp->ExceptionRecord->ExceptionInformation[0] == 1 ? "writing" :
																  "reading";

		fmt::append(msg, "Segfault %s location %p at %p.\n", cause, pExp->ExceptionRecord->ExceptionInformation[1], pExp->ExceptionRecord->ExceptionAddress);

		if (vm::try_get_addr(reinterpret_cast<u8*>(pExp->ExceptionRecord->ExceptionInformation[1])).second)
		{
			fmt::append(msg, "Sudo Addr: %p, VM Addr: %p\n", vm::g_sudo_addr, vm::g_base_addr);
		}
	}
	else
	{
		fmt::append(msg, "Exception address: %p.\n", pExp->ExceptionRecord->ExceptionAddress);

		for (DWORD i = 0; i < pExp->ExceptionRecord->NumberParameters; i++)
		{
			fmt::append(msg, "ExceptionInformation[0x%x]: %p.\n", i, pExp->ExceptionRecord->ExceptionInformation[i]);
		}
	}

	append_thread_name(msg);

	std::vector<HMODULE> modules;
	for (DWORD size = 256; modules.size() != size; size /= sizeof(HMODULE))
	{
		modules.resize(size);
		if (!EnumProcessModules(GetCurrentProcess(), modules.data(), size * sizeof(HMODULE), &size))
		{
			modules.clear();
			break;
		}
	}

#if defined(ARCH_X64)
	const auto exec_addr = pExp->ContextRecord->Rip;
#elif defined(ARCH_ARM64)
	const auto exec_addr = pExp->ContextRecord->Pc;
#else
#error "Unimplemented exception handling for this architecture"
#endif

	fmt::append(msg, "Instruction address: %p.\n", exec_addr);

	DWORD64 unwind_base;
	if (const auto rtf = RtlLookupFunctionEntry(exec_addr, &unwind_base, nullptr))
	{
		// Get function address
		const DWORD64 func_addr = rtf->BeginAddress + unwind_base;
		fmt::append(msg, "Function address: %p (base+0x%x).\n", func_addr, rtf->BeginAddress);