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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/hang_monitor/hang_crash_dump_win.h"
#include "base/debug/crash_logging.h"
#include "base/logging.h"
#include "base/strings/string_util.h"
#include "chrome/common/chrome_constants.h"
#include "content/public/common/result_codes.h"
namespace {
// How long do we wait for the terminated thread or process to die (in ms)
static const int kTerminateTimeoutMS = 2000;
// How long do we wait for the crash to be generated (in ms).
static const int kGenerateDumpTimeoutMS = 10000;
enum NoCrashKeyReason {
kNoCrashKeyReasonVirtualAlloc = 1,
kNoCrashKeyReasonWriteProcessMemory,
kNoCrashKeyReasonNoKeys
};
} // namespace
void CrashDumpAndTerminateHungChildProcess(
HANDLE hprocess,
const base::StringPairs& additional_child_crash_keys) {
// Before terminating the process we try collecting a dump. Which
// a transient thread in the child process will do for us.
typedef HANDLE(__cdecl * DumpFunction)(HANDLE, void*);
typedef HANDLE(__cdecl * DumpFunctionNoCrashKeys)(HANDLE, int);
static DumpFunction request_dump = nullptr;
static DumpFunctionNoCrashKeys request_dump_no_crash_keys = nullptr;
if (!request_dump) {
request_dump = reinterpret_cast<DumpFunction>(GetProcAddress(
GetModuleHandle(chrome::kChromeElfDllName), "InjectDumpForHungInput"));
DCHECK(request_dump) << "Failed loading DumpProcessWithoutCrash: error " <<
GetLastError();
}
if (!request_dump_no_crash_keys) {
request_dump_no_crash_keys = reinterpret_cast<DumpFunctionNoCrashKeys>(
GetProcAddress(GetModuleHandle(chrome::kChromeElfDllName),
"InjectDumpForHungInputNoCrashKeys"));
DCHECK(request_dump_no_crash_keys)
<< "Failed loading DumpProcessWithoutCrash: error " << GetLastError();
}
DWORD crash_key_failure = 0;
void* remote_memory = nullptr;
bool send_remote_memory = false;
std::vector<std::string> keys;
for (const auto& crash_key : additional_child_crash_keys) {
DCHECK(base::debug::LookupCrashKey(crash_key.first));
std::string serialized_key = crash_key.first;
serialized_key.append(":");
serialized_key.append(crash_key.second);
keys.push_back(serialized_key);
}
std::string serialized_keys = base::JoinString(keys, ",");
if (!serialized_keys.empty()) {
size_t data_length = serialized_keys.length() + 1;
remote_memory = VirtualAllocEx(hprocess, nullptr, data_length,
MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
if (remote_memory) {
send_remote_memory =
!!WriteProcessMemory(hprocess, remote_memory, serialized_keys.c_str(),
data_length, nullptr);
crash_key_failure =
MAKELPARAM(kNoCrashKeyReasonWriteProcessMemory, GetLastError());
} else {
crash_key_failure =
MAKELPARAM(kNoCrashKeyReasonVirtualAlloc, GetLastError());
}
} else {
crash_key_failure = MAKELPARAM(kNoCrashKeyReasonNoKeys, 0);
}
HANDLE remote_thread = nullptr;
if (request_dump && send_remote_memory) {
remote_thread = request_dump(hprocess, remote_memory);
} else if (request_dump_no_crash_keys) {
remote_thread = request_dump_no_crash_keys(hprocess, crash_key_failure);
}
DCHECK(remote_thread) << "Failed creating remote thread: error "
<< GetLastError();
if (remote_thread) {
WaitForSingleObject(remote_thread, kGenerateDumpTimeoutMS);
CloseHandle(remote_thread);
}
TerminateProcess(hprocess, content::RESULT_CODE_HUNG);
WaitForSingleObject(hprocess, kTerminateTimeoutMS);
}
void CrashDumpForHangDebugging(HANDLE hprocess) {
if (hprocess == GetCurrentProcess()) {
typedef void (__cdecl *DumpFunction)();
DumpFunction request_dump = reinterpret_cast<DumpFunction>(GetProcAddress(
GetModuleHandle(chrome::kChromeElfDllName), "DumpProcessWithoutCrash"));
DCHECK(request_dump) << "Failed loading DumpProcessWithoutCrash: error " <<
GetLastError();
if (request_dump)
request_dump();
} else {
typedef HANDLE (__cdecl *DumpFunction)(HANDLE);
DumpFunction request_dump = reinterpret_cast<DumpFunction>(
GetProcAddress(GetModuleHandle(chrome::kChromeElfDllName),
"InjectDumpForHangDebugging"));
DCHECK(request_dump) << "Failed loading InjectDumpForHangDebugging: error "
<< GetLastError();
if (request_dump) {
HANDLE remote_thread = request_dump(hprocess);
DCHECK(remote_thread) << "Failed creating remote thread: error " <<
GetLastError();
if (remote_thread) {
WaitForSingleObject(remote_thread, kGenerateDumpTimeoutMS);
CloseHandle(remote_thread);
}
}
}
}
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