blob: f654119f8cf29fac7f06a6670ae7d2bb8da0f59f [file] [log] [blame]
// Copyright 2022 The Crashpad Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <string.h>
#include "base/check.h"
#include "base/files/file_path.h"
#include "base/logging.h"
#include "client/crashpad_client.h"
#include "util/misc/paths.h"
#include <Windows.h>
// We set up a program that crashes with a CFG exception so must be built and
// linked with /guard:cf. We register the crashpad runtime exception helper
// module to intercept and trigger the crashpad handler. Note that Windows only
// loads the module in WerFault after the crash for Windows 10 >= 20h1 (19041).
namespace crashpad {
namespace {
// This function should not be on our stack as CFG prevents the modified
// icall from happening.
int CallRffeManyTimes() {
RaiseFailFastException(nullptr, nullptr, 0);
RaiseFailFastException(nullptr, nullptr, 0);
RaiseFailFastException(nullptr, nullptr, 0);
RaiseFailFastException(nullptr, nullptr, 0);
return 1;
}
using FuncType = decltype(&CallRffeManyTimes);
void IndirectCall(FuncType* func) {
// This code always generates CFG guards.
(*func)();
}
void CfgCrash() {
// Call into the middle of the Crashy function.
FuncType func = reinterpret_cast<FuncType>(
(reinterpret_cast<uintptr_t>(CallRffeManyTimes)) + 16);
__try {
// Generates a STATUS_STACK_BUFFER_OVERRUN exception if CFG triggers.
IndirectCall(&func);
} __except (EXCEPTION_EXECUTE_HANDLER) {
// CFG fast fail should never be caught.
CHECK(false);
}
// Should only reach here if CFG is disabled.
abort();
}
void FastFailCrash() {
__fastfail(77);
}
int CrashyMain(int argc, wchar_t* argv[]) {
static CrashpadClient* client = new crashpad::CrashpadClient();
std::wstring type;
if (argc == 3) {
type = argv[2];
// We call this from end_to_end_test.py.
if (!client->SetHandlerIPCPipe(argv[1])) {
LOG(ERROR) << "SetHandler";
return EXIT_FAILURE;
}
} else if (argc == 4) {
type = argv[3];
// This is helpful for debugging.
if (!client->StartHandler(base::FilePath(argv[1]),
base::FilePath(argv[2]),
base::FilePath(),
std::string(),
std::map<std::string, std::string>(),
std::vector<std::string>(),
false,
true)) {
LOG(ERROR) << "StartHandler";
return EXIT_FAILURE;
}
// Got to have a handler & registration.
if (!client->WaitForHandlerStart(10000)) {
LOG(ERROR) << "Handler failed to start";
return EXIT_FAILURE;
}
} else {
fprintf(stderr, "Usage: %ls <server_pipe_name> [cf|ff]\n", argv[0]);
fprintf(
stderr, " %ls <handler_path> <database_path> [cf|ff]\n", argv[0]);
return EXIT_FAILURE;
}
base::FilePath exe_path;
if (!Paths::Executable(&exe_path)) {
LOG(ERROR) << "Failed getting path";
return EXIT_FAILURE;
}
// Find the module.
auto mod_path = exe_path.DirName().Append(L"crashpad_wer.dll");
// Make sure it is registered in the registry.
DWORD dwOne = 1;
LSTATUS reg_res =
RegSetKeyValueW(HKEY_CURRENT_USER,
L"Software\\Microsoft\\Windows\\Windows Error Reporting\\"
L"RuntimeExceptionHelperModules",
mod_path.value().c_str(),
REG_DWORD,
&dwOne,
sizeof(DWORD));
if (reg_res != ERROR_SUCCESS) {
LOG(ERROR) << "RegSetKeyValueW";
return EXIT_FAILURE;
}
if (!client->RegisterWerModule(mod_path.value())) {
LOG(ERROR) << "WerRegisterRuntimeExceptionModule";
return EXIT_FAILURE;
}
// Some versions of python call SetErrorMode() which extends to children, and
// prevents the WerFault infrastructure from running.
SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOOPENFILEERRORBOX);
if (type == L"cf")
CfgCrash();
if (type == L"ff")
FastFailCrash();
LOG(ERROR) << "Invalid type or exception failed.";
return EXIT_FAILURE;
}
} // namespace
} // namespace crashpad
int wmain(int argc, wchar_t* argv[]) {
return crashpad::CrashyMain(argc, argv);
}