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mini_dump: Check for debugger before spawning a child

Browse source 
mini_dump: Clean up

mini_dump: Fix MSVC error

mini_dump: Silence MSVC warning C4700

Zero initialize deb_ev.

mini_dump: Add license info
This commit is contained in:
lat9nq 2022-07-18 21:36:26 -04:00
parent 3dbaafe1f3
commit e339ec0e00
2 changed files with 40 additions and 66 deletions
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81
src/yuzu/mini_dump.cpp
View file

@ -1,3 +1,6 @@
// SPDX-FileCopyrightText: 2022 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <cstdio>
#include <cstring>
#include <ctime>
@ -16,28 +19,28 @@ void CreateMiniDump(HANDLE process_handle, DWORD process_id, MINIDUMP_EXCEPTION_
std::strftime(file_name, 255, "yuzu-crash-%Y%m%d%H%M%S.dmp", std::localtime(&the_time));
// Open the file
HANDLE file_handle = CreateFile(file_name, GENERIC_READ | GENERIC_WRITE, 0, nullptr,
HANDLE file_handle = CreateFileA(file_name, GENERIC_READ | GENERIC_WRITE, 0, nullptr,
CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, nullptr);
if ((file_handle != nullptr) && (file_handle != INVALID_HANDLE_VALUE)) {
if (file_handle == nullptr || file_handle == INVALID_HANDLE_VALUE) {
std::fprintf(stderr, "CreateFileA failed. Error: %d\n", GetLastError());
return;
}
// Create the minidump
const MINIDUMP_TYPE dump_type = MiniDumpNormal;
const bool write_dump_status = MiniDumpWriteDump(process_handle, process_id, file_handle,
dump_type, (pep != 0) ? info : 0, 0, 0);
if (!write_dump_status) {
std::fprintf(stderr, "MiniDumpWriteDump failed. Error: %d\n", GetLastError());
} else {
if (write_dump_status) {
std::fprintf(stderr, "MiniDump created: %s\n", file_name);
} else {
std::fprintf(stderr, "MiniDumpWriteDump failed. Error: %d\n", GetLastError());
}
// Close the file
CloseHandle(file_handle);
} else {
std::fprintf(stderr, "CreateFile failed. Error: %d\n", GetLastError());
}
}
void DumpFromDebugEvent(DEBUG_EVENT& deb_ev, PROCESS_INFORMATION& pi) {
@ -77,13 +80,13 @@ void DumpFromDebugEvent(DEBUG_EVENT& deb_ev, PROCESS_INFORMATION& pi) {
bool SpawnDebuggee(const char* arg0, PROCESS_INFORMATION& pi) {
std::memset(&pi, 0, sizeof(pi));
if (!SpawnChild(arg0, &pi, 0)) {
std::fprintf(stderr, "warning: continuing without crash dumps\n");
// Don't debug if we are already being debugged
if (IsDebuggerPresent()) {
return false;
}
// Don't debug if we are already being debugged
if (IsDebuggerPresent()) {
if (!SpawnChild(arg0, &pi, 0)) {
std::fprintf(stderr, "warning: continuing without crash dumps\n");
return false;
}
@ -100,8 +103,7 @@ bool SpawnDebuggee(const char* arg0, PROCESS_INFORMATION& pi) {
void DebugDebuggee(PROCESS_INFORMATION& pi) {
DEBUG_EVENT deb_ev;
const std::time_t start_time = std::time(nullptr);
//~ bool seen_nonzero_thread_exit = false;
std::memset(&deb_ev, 0, sizeof(deb_ev));
while (deb_ev.dwDebugEventCode != EXIT_PROCESS_DEBUG_EVENT) {
const bool wait_success = WaitForDebugEvent(&deb_ev, INFINITE);
@ -119,60 +121,29 @@ void DebugDebuggee(PROCESS_INFORMATION& pi) {
case LOAD_DLL_DEBUG_EVENT:
case RIP_EVENT:
case UNLOAD_DLL_DEBUG_EVENT:
// Continue on all other debug events
ContinueDebugEvent(deb_ev.dwProcessId, deb_ev.dwThreadId, DBG_CONTINUE);
break;
//~ case EXIT_THREAD_DEBUG_EVENT: {
//~ const DWORD& exit_code = deb_ev.u.ExitThread.dwExitCode;
//~ // Generate a crash dump on the first abnormal thread exit.
//~ // We don't want to generate on every abnormal thread exit since ALL the other
// threads ~ // in the application will follow by exiting with the same code. ~ if
//(!seen_nonzero_thread_exit && exit_code != 0) { ~ seen_nonzero_thread_exit = true; ~
// std::fprintf(stderr, ~ "Creating MiniDump on first non-zero thread exit: code
// 0x%08x\n", ~ exit_code);
//~ DumpFromDebugEvent(deb_ev, pi);
//~ }
//~ ContinueDebugEvent(deb_ev.dwProcessId, deb_ev.dwThreadId, DBG_CONTINUE);
//~ break;
//~ }
case EXCEPTION_DEBUG_EVENT: {
case EXCEPTION_DEBUG_EVENT:
EXCEPTION_RECORD& record = deb_ev.u.Exception.ExceptionRecord;
const std::time_t now = std::time(nullptr);
const std::time_t delta = now - start_time;
if (ExceptionName(record.ExceptionCode) == nullptr) {
int record_count = 0;
EXCEPTION_RECORD* next_record = &deb_ev.u.Exception.ExceptionRecord;
while (next_record != nullptr) {
std::fprintf(stderr,
"[%d] code(%d): 0x%08x\n\tflags: %08x %s\n\taddress: "
"0x%08x\n\tparameters: %d\n",
delta, record_count, next_record->ExceptionCode,
next_record->ExceptionFlags,
next_record->ExceptionFlags == EXCEPTION_NONCONTINUABLE
? "noncontinuable"
: "",
next_record->ExceptionAddress, next_record->NumberParameters);
for (int i = 0; i < static_cast<int>(next_record->NumberParameters); i++) {
std::fprintf(stderr, "\t\t%0d: 0x%08x\n", i,
next_record->ExceptionInformation[i]);
}
record_count++;
next_record = next_record->ExceptionRecord;
}
}
// We want to generate a crash dump if we are seeing the same exception again.
if (!deb_ev.u.Exception.dwFirstChance) {
std::fprintf(stderr, "Creating MiniDump on ExceptionCode: 0x%08x %s\n",
record.ExceptionCode, ExceptionName(record.ExceptionCode));
DumpFromDebugEvent(deb_ev, pi);
}
// Continue without handling the exception.
// Lets the debuggee use its own exception handler.
// - If one does not exist, we will see the exception once more where we make a minidump
// for. Then when it reaches here again, yuzu will probably crash.
// - DBG_CONTINUE on an exception that the debuggee does not handle can set us up for an
// infinite loop of exceptions.
ContinueDebugEvent(deb_ev.dwProcessId, deb_ev.dwThreadId, DBG_EXCEPTION_NOT_HANDLED);
break;
}
}
}
}
const char* ExceptionName(DWORD exception) {

3
src/yuzu/mini_dump.h
View file

@ -1,3 +1,6 @@
// SPDX-FileCopyrightText: 2022 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <windows.h>