blob: 99735fdead52127ccd9d20ac86655f19d9ecc301 [file] [log] [blame]
// Copyright (c) 2011 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/app/breakpad_win.h"
#include <windows.h>
#include <shellapi.h>
#include <tchar.h>
#include <algorithm>
#include <vector>
#include "base/base_switches.h"
#include "base/command_line.h"
#include "base/environment.h"
#include "base/file_util.h"
#include "base/file_version_info.h"
#include "base/memory/scoped_ptr.h"
#include "base/string_split.h"
#include "base/string_util.h"
#include "base/stringprintf.h"
#include "base/utf_string_conversions.h"
#include "base/win/registry.h"
#include "base/win/win_util.h"
#include "breakpad/src/client/windows/handler/exception_handler.h"
#include "chrome/app/hard_error_handler_win.h"
#include "chrome/common/child_process_logging.h"
#include "chrome/common/chrome_result_codes.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/env_vars.h"
#include "chrome/installer/util/google_chrome_sxs_distribution.h"
#include "chrome/installer/util/google_update_settings.h"
#include "chrome/installer/util/install_util.h"
#include "policy/policy_constants.h"
namespace {
// Minidump with stacks, PEB, TEB, and unloaded module list.
const MINIDUMP_TYPE kSmallDumpType = static_cast<MINIDUMP_TYPE>(
MiniDumpWithProcessThreadData | // Get PEB and TEB.
MiniDumpWithUnloadedModules); // Get unloaded modules when available.
// Minidump with all of the above, plus memory referenced from stack.
const MINIDUMP_TYPE kLargerDumpType = static_cast<MINIDUMP_TYPE>(
MiniDumpWithProcessThreadData | // Get PEB and TEB.
MiniDumpWithUnloadedModules | // Get unloaded modules when available.
MiniDumpWithIndirectlyReferencedMemory); // Get memory referenced by stack.
// Large dump with all process memory.
const MINIDUMP_TYPE kFullDumpType = static_cast<MINIDUMP_TYPE>(
MiniDumpWithFullMemory | // Full memory from process.
MiniDumpWithProcessThreadData | // Get PEB and TEB.
MiniDumpWithHandleData | // Get all handle information.
MiniDumpWithUnloadedModules); // Get unloaded modules when available.
const wchar_t kGoogleUpdatePipeName[] = L"\\\\.\\pipe\\GoogleCrashServices\\";
const wchar_t kChromePipeName[] = L"\\\\.\\pipe\\ChromeCrashServices";
// This is the well known SID for the system principal.
const wchar_t kSystemPrincipalSid[] =L"S-1-5-18";
google_breakpad::ExceptionHandler* g_breakpad = NULL;
// A pointer to the custom entries that we send in the event of a crash. We need
// this pointer, along with the offsets into it below, so that we can keep the
// data updated as the state of the browser changes.
static std::vector<google_breakpad::CustomInfoEntry>* g_custom_entries = NULL;
static size_t g_url_chunks_offset;
static size_t g_num_of_extensions_offset;
static size_t g_extension_ids_offset;
static size_t g_client_id_offset;
static size_t g_gpu_info_offset;
static size_t g_num_of_views_offset;
static size_t g_num_switches_offset;
static size_t g_switches_offset;
// Maximum length for plugin path to include in plugin crash reports.
const size_t kMaxPluginPathLength = 256;
// Dumps the current process memory.
extern "C" void __declspec(dllexport) __cdecl DumpProcess() {
if (g_breakpad)
g_breakpad->WriteMinidump();
}
// Reduces the size of the string |str| to a max of 64 chars. Required because
// breakpad's CustomInfoEntry raises an invalid_parameter error if the string
// we want to set is longer.
std::wstring TrimToBreakpadMax(const std::wstring& str) {
std::wstring shorter(str);
return shorter.substr(0,
google_breakpad::CustomInfoEntry::kValueMaxLength - 1);
}
static void SetIntegerValue(size_t offset, int value) {
if (!g_custom_entries)
return;
base::wcslcpy((*g_custom_entries)[offset].value,
base::StringPrintf(L"%d", value).c_str(),
google_breakpad::CustomInfoEntry::kValueMaxLength);
}
bool IsBoringCommandLineSwitch(const std::wstring& flag) {
return StartsWith(flag, L"--channel=", true) ||
// No point to including this since we already have a ptype field.
StartsWith(flag, L"--type=", true) ||
// Not particularly interesting
StartsWith(flag, L"--flash-broker=", true) ||
// Just about everything has this, don't bother.
StartsWith(flag, L"/prefetch:", true) ||
// We handle the plugin path separately since it is usually too big
// to fit in the switches (limited to 63 characters).
StartsWith(flag, L"--plugin-path=", true) ||
// This is too big so we end up truncating it anyway.
StartsWith(flag, L"--force-fieldtest=", true) ||
// These surround the flags that were added by about:flags, it lets
// you distinguish which flags were added manually via the command
// line versus those added through about:flags. For the most part
// we don't care how an option was enabled, so we strip these.
// (If you need to know can always look at the PEB).
flag == L"--flag-switches-begin" ||
flag == L"--flag-switches-end";
}
extern "C" void __declspec(dllexport) __cdecl SetCommandLine(
const CommandLine* command_line) {
if (!g_custom_entries)
return;
const CommandLine::StringVector& argv = command_line->argv();
// Copy up to the kMaxSwitches arguments into the custom entries array. Skip
// past the first argument, as it is just the executable path.
size_t argv_i = 1;
size_t num_added = 0;
for (; argv_i < argv.size() && num_added < kMaxSwitches; ++argv_i) {
// Don't bother including boring command line switches in crash reports.
if (IsBoringCommandLineSwitch(argv[argv_i]))
continue;
base::wcslcpy((*g_custom_entries)[g_switches_offset + num_added].value,
argv[argv_i].c_str(),
google_breakpad::CustomInfoEntry::kValueMaxLength);
num_added++;
}
// Make note of the total number of switches. This is useful in case we have
// truncated at kMaxSwitches, to see how many were unaccounted for.
SetIntegerValue(g_num_switches_offset, static_cast<int>(argv.size()) - 1);
}
// Appends the plugin path to |g_custom_entries|.
void SetPluginPath(const std::wstring& path) {
DCHECK(g_custom_entries);
if (path.size() > kMaxPluginPathLength) {
// If the path is too long, truncate from the start rather than the end,
// since we want to be able to recover the DLL name.
SetPluginPath(path.substr(path.size() - kMaxPluginPathLength));
return;
}
// The chunk size without terminator.
const size_t kChunkSize = static_cast<size_t>(
google_breakpad::CustomInfoEntry::kValueMaxLength - 1);
int chunk_index = 0;
size_t chunk_start = 0; // Current position inside |path|
for (chunk_start = 0; chunk_start < path.size(); chunk_index++) {
size_t chunk_length = std::min(kChunkSize, path.size() - chunk_start);
g_custom_entries->push_back(google_breakpad::CustomInfoEntry(
base::StringPrintf(L"plugin-path-chunk-%i", chunk_index + 1).c_str(),
path.substr(chunk_start, chunk_length).c_str()));
chunk_start += chunk_length;
}
}
// Returns the custom info structure based on the dll in parameter and the
// process type.
google_breakpad::CustomClientInfo* GetCustomInfo(const std::wstring& dll_path,
const std::wstring& type,
const std::wstring& channel) {
scoped_ptr<FileVersionInfo>
version_info(FileVersionInfo::CreateFileVersionInfo(FilePath(dll_path)));
std::wstring version, product;
std::wstring special_build;
if (version_info.get()) {
// Get the information from the file.
version = version_info->product_version();
if (!version_info->is_official_build())
version.append(L"-devel");
const CommandLine& command = *CommandLine::ForCurrentProcess();
if (command.HasSwitch(switches::kChromeFrame)) {
product = L"ChromeFrame";
} else {
product = version_info->product_short_name();
}
special_build = version_info->special_build();
} else {
// No version info found. Make up the values.
product = L"Chrome";
version = L"0.0.0.0-devel";
}
// We only expect this method to be called once per process.
DCHECK(!g_custom_entries);
g_custom_entries = new std::vector<google_breakpad::CustomInfoEntry>;
// Common g_custom_entries.
g_custom_entries->push_back(
google_breakpad::CustomInfoEntry(L"ver", version.c_str()));
g_custom_entries->push_back(
google_breakpad::CustomInfoEntry(L"prod", product.c_str()));
g_custom_entries->push_back(
google_breakpad::CustomInfoEntry(L"plat", L"Win32"));
g_custom_entries->push_back(
google_breakpad::CustomInfoEntry(L"ptype", type.c_str()));
g_custom_entries->push_back(
google_breakpad::CustomInfoEntry(L"channel", channel.c_str()));
if (!special_build.empty())
g_custom_entries->push_back(
google_breakpad::CustomInfoEntry(L"special", special_build.c_str()));
g_num_of_extensions_offset = g_custom_entries->size();
g_custom_entries->push_back(
google_breakpad::CustomInfoEntry(L"num-extensions", L"N/A"));
g_extension_ids_offset = g_custom_entries->size();
for (int i = 0; i < kMaxReportedActiveExtensions; ++i) {
g_custom_entries->push_back(google_breakpad::CustomInfoEntry(
base::StringPrintf(L"extension-%i", i + 1).c_str(), L""));
}
// Add empty values for the gpu_info. We'll put the actual values
// when we collect them at this location.
g_gpu_info_offset = g_custom_entries->size();
g_custom_entries->push_back(
google_breakpad::CustomInfoEntry(L"gpu-venid", L""));
g_custom_entries->push_back(
google_breakpad::CustomInfoEntry(L"gpu-devid", L""));
g_custom_entries->push_back(
google_breakpad::CustomInfoEntry(L"gpu-driver", L""));
g_custom_entries->push_back(
google_breakpad::CustomInfoEntry(L"gpu-psver", L""));
g_custom_entries->push_back(
google_breakpad::CustomInfoEntry(L"gpu-vsver", L""));
// Read the id from registry. If reporting has never been enabled
// the result will be empty string. Its OK since when user enables reporting
// we will insert the new value at this location.
std::wstring guid;
GoogleUpdateSettings::GetMetricsId(&guid);
g_client_id_offset = g_custom_entries->size();
g_custom_entries->push_back(
google_breakpad::CustomInfoEntry(L"guid", guid.c_str()));
// Add empty values for the command line switches. We will fill them with
// actual values as part of SetCommandLine().
g_num_switches_offset = g_custom_entries->size();
g_custom_entries->push_back(
google_breakpad::CustomInfoEntry(L"num-switches", L""));
g_switches_offset = g_custom_entries->size();
for (int i = 0; i < kMaxSwitches; ++i) {
g_custom_entries->push_back(google_breakpad::CustomInfoEntry(
base::StringPrintf(L"switch-%i", i + 1).c_str(), L""));
}
// Fill in the command line arguments using CommandLine::ForCurrentProcess().
// The browser process may call SetCommandLine() again later on with a command
// line that has been augmented with the about:flags experiments.
SetCommandLine(CommandLine::ForCurrentProcess());
if (type == L"renderer" || type == L"plugin" || type == L"gpu-process") {
g_num_of_views_offset = g_custom_entries->size();
g_custom_entries->push_back(
google_breakpad::CustomInfoEntry(L"num-views", L""));
// Create entries for the URL. Currently we only allow each chunk to be 64
// characters, which isn't enough for a URL. As a hack we create 8 entries
// and split the URL across the g_custom_entries.
g_url_chunks_offset = g_custom_entries->size();
for (int i = 0; i < kMaxUrlChunks; ++i) {
g_custom_entries->push_back(google_breakpad::CustomInfoEntry(
base::StringPrintf(L"url-chunk-%i", i + 1).c_str(), L""));
}
if (type == L"plugin") {
std::wstring plugin_path =
CommandLine::ForCurrentProcess()->GetSwitchValueNative("plugin-path");
if (!plugin_path.empty())
SetPluginPath(plugin_path);
}
} else {
g_custom_entries->push_back(
google_breakpad::CustomInfoEntry(L"num-views", L"N/A"));
}
static google_breakpad::CustomClientInfo custom_client_info;
custom_client_info.entries = &g_custom_entries->front();
custom_client_info.count = g_custom_entries->size();
return &custom_client_info;
}
// Contains the information needed by the worker thread.
struct CrashReporterInfo {
google_breakpad::CustomClientInfo* custom_info;
std::wstring dll_path;
std::wstring process_type;
};
// This callback is executed when the browser process has crashed, after
// the crash dump has been created. We need to minimize the amount of work
// done here since we have potentially corrupted process. Our job is to
// spawn another instance of chrome which will show a 'chrome has crashed'
// dialog. This code needs to live in the exe and thus has no access to
// facilities such as the i18n helpers.
bool DumpDoneCallback(const wchar_t*, const wchar_t*, void*,
EXCEPTION_POINTERS* ex_info,
MDRawAssertionInfo*, bool) {
// If the exception is because there was a problem loading a delay-loaded
// module, then show the user a dialog explaining the problem and then exit.
if (DelayLoadFailureExceptionMessageBox(ex_info))
return true;
// We set CHROME_CRASHED env var. If the CHROME_RESTART is present.
// This signals the child process to show the 'chrome has crashed' dialog.
scoped_ptr<base::Environment> env(base::Environment::Create());
if (!env->HasVar(env_vars::kRestartInfo)) {
return true;
}
env->SetVar(env_vars::kShowRestart, "1");
// Now we just start chrome browser with the same command line.
STARTUPINFOW si = {sizeof(si)};
PROCESS_INFORMATION pi;
if (::CreateProcessW(NULL, ::GetCommandLineW(), NULL, NULL, FALSE,
CREATE_UNICODE_ENVIRONMENT, NULL, NULL, &si, &pi)) {
::CloseHandle(pi.hProcess);
::CloseHandle(pi.hThread);
}
// After this return we will be terminated. The actual return value is
// not used at all.
return true;
}
// flag to indicate that we are already handling an exception.
volatile LONG handling_exception = 0;
// This callback is executed when the Chrome process has crashed and *before*
// the crash dump is created. To prevent duplicate crash reports we
// make every thread calling this method, except the very first one,
// go to sleep.
bool FilterCallback(void*, EXCEPTION_POINTERS*, MDRawAssertionInfo*) {
// Capture every thread except the first one in the sleep. We don't
// want multiple threads to concurrently report exceptions.
if (::InterlockedCompareExchange(&handling_exception, 1, 0) == 1) {
::Sleep(INFINITE);
}
return true;
}
// Previous unhandled filter. Will be called if not null when we
// intercept a crash.
LPTOP_LEVEL_EXCEPTION_FILTER previous_filter = NULL;
// Exception filter used when breakpad is not enabled. We just display
// the "Do you want to restart" message and then we call the previous filter.
long WINAPI ChromeExceptionFilter(EXCEPTION_POINTERS* info) {
DumpDoneCallback(NULL, NULL, NULL, info, NULL, false);
if (previous_filter)
return previous_filter(info);
return EXCEPTION_EXECUTE_HANDLER;
}
// Exception filter for the service process used when breakpad is not enabled.
// We just display the "Do you want to restart" message and then die
// (without calling the previous filter).
long WINAPI ServiceExceptionFilter(EXCEPTION_POINTERS* info) {
DumpDoneCallback(NULL, NULL, NULL, info, NULL, false);
return EXCEPTION_EXECUTE_HANDLER;
}
extern "C" void __declspec(dllexport) __cdecl SetActiveURL(
const wchar_t* url_cstring) {
DCHECK(url_cstring);
if (!g_custom_entries)
return;
std::wstring url(url_cstring);
size_t chunk_index = 0;
size_t url_size = url.size();
// Split the url across all the chunks.
for (size_t url_offset = 0;
chunk_index < kMaxUrlChunks && url_offset < url_size; ++chunk_index) {
size_t current_chunk_size = std::min(url_size - url_offset,
static_cast<size_t>(
google_breakpad::CustomInfoEntry::kValueMaxLength - 1));
wchar_t* entry_value =
(*g_custom_entries)[g_url_chunks_offset + chunk_index].value;
url._Copy_s(entry_value,
google_breakpad::CustomInfoEntry::kValueMaxLength,
current_chunk_size, url_offset);
entry_value[current_chunk_size] = L'\0';
url_offset += current_chunk_size;
}
// And null terminate any unneeded chunks.
for (; chunk_index < kMaxUrlChunks; ++chunk_index)
(*g_custom_entries)[g_url_chunks_offset + chunk_index].value[0] = L'\0';
}
extern "C" void __declspec(dllexport) __cdecl SetClientId(
const wchar_t* client_id) {
if (client_id == NULL)
return;
if (!g_custom_entries)
return;
base::wcslcpy((*g_custom_entries)[g_client_id_offset].value,
client_id,
google_breakpad::CustomInfoEntry::kValueMaxLength);
}
extern "C" void __declspec(dllexport) __cdecl SetNumberOfExtensions(
int number_of_extensions) {
SetIntegerValue(g_num_of_extensions_offset, number_of_extensions);
}
extern "C" void __declspec(dllexport) __cdecl SetExtensionID(
int index, const wchar_t* id) {
DCHECK(id);
DCHECK(index < kMaxReportedActiveExtensions);
if (!g_custom_entries)
return;
base::wcslcpy((*g_custom_entries)[g_extension_ids_offset + index].value,
id,
google_breakpad::CustomInfoEntry::kValueMaxLength);
}
extern "C" void __declspec(dllexport) __cdecl SetGpuInfo(
const wchar_t* vendor_id, const wchar_t* device_id,
const wchar_t* driver_version, const wchar_t* pixel_shader_version,
const wchar_t* vertex_shader_version) {
if (!g_custom_entries)
return;
base::wcslcpy((*g_custom_entries)[g_gpu_info_offset].value,
vendor_id,
google_breakpad::CustomInfoEntry::kValueMaxLength);
base::wcslcpy((*g_custom_entries)[g_gpu_info_offset+1].value,
device_id,
google_breakpad::CustomInfoEntry::kValueMaxLength);
base::wcslcpy((*g_custom_entries)[g_gpu_info_offset+2].value,
driver_version,
google_breakpad::CustomInfoEntry::kValueMaxLength);
base::wcslcpy((*g_custom_entries)[g_gpu_info_offset+3].value,
pixel_shader_version,
google_breakpad::CustomInfoEntry::kValueMaxLength);
base::wcslcpy((*g_custom_entries)[g_gpu_info_offset+4].value,
vertex_shader_version,
google_breakpad::CustomInfoEntry::kValueMaxLength);
}
extern "C" void __declspec(dllexport) __cdecl SetNumberOfViews(
int number_of_views) {
SetIntegerValue(g_num_of_views_offset, number_of_views);
}
} // namespace
bool WrapMessageBoxWithSEH(const wchar_t* text, const wchar_t* caption,
UINT flags, bool* exit_now) {
// We wrap the call to MessageBoxW with a SEH handler because it some
// machines with CursorXP, PeaDict or with FontExplorer installed it crashes
// uncontrollably here. Being this a best effort deal we better go away.
__try {
*exit_now = (IDOK != ::MessageBoxW(NULL, text, caption, flags));
} __except(EXCEPTION_EXECUTE_HANDLER) {
// Its not safe to continue executing, exit silently here.
::ExitProcess(chrome::RESULT_CODE_RESPAWN_FAILED);
}
return true;
}
// This function is executed by the child process that DumpDoneCallback()
// spawned and basically just shows the 'chrome has crashed' dialog if
// the CHROME_CRASHED environment variable is present.
bool ShowRestartDialogIfCrashed(bool* exit_now) {
if (!::GetEnvironmentVariableW(ASCIIToWide(env_vars::kShowRestart).c_str(),
NULL, 0)) {
return false;
}
DWORD len = ::GetEnvironmentVariableW(
ASCIIToWide(env_vars::kRestartInfo).c_str(), NULL, 0);
if (!len)
return true;
wchar_t* restart_data = new wchar_t[len + 1];
::GetEnvironmentVariableW(ASCIIToWide(env_vars::kRestartInfo).c_str(),
restart_data, len);
restart_data[len] = 0;
// The CHROME_RESTART var contains the dialog strings separated by '|'.
// See PrepareRestartOnCrashEnviroment() function for details.
std::vector<std::wstring> dlg_strings;
base::SplitString(restart_data, L'|', &dlg_strings);
delete[] restart_data;
if (dlg_strings.size() < 3)
return true;
// If the UI layout is right-to-left, we need to pass the appropriate MB_XXX
// flags so that an RTL message box is displayed.
UINT flags = MB_OKCANCEL | MB_ICONWARNING;
if (dlg_strings[2] == ASCIIToWide(env_vars::kRtlLocale))
flags |= MB_RIGHT | MB_RTLREADING;
return WrapMessageBoxWithSEH(dlg_strings[1].c_str(), dlg_strings[0].c_str(),
flags, exit_now);
}
// Crashes the process after generating a dump for the provided exception. Note
// that the crash reporter should be initialized before calling this function
// for it to do anything.
extern "C" int __declspec(dllexport) CrashForException(
EXCEPTION_POINTERS* info) {
if (g_breakpad) {
g_breakpad->WriteMinidumpForException(info);
::ExitProcess(content::RESULT_CODE_KILLED);
}
return EXCEPTION_CONTINUE_SEARCH;
}
// Determine whether configuration management allows loading the crash reporter.
// Since the configuration management infrastructure is not initialized at this
// point, we read the corresponding registry key directly. The return status
// indicates whether policy data was successfully read. If it is true, |result|
// contains the value set by policy.
static bool MetricsReportingControlledByPolicy(bool* result) {
std::wstring key_name = UTF8ToWide(policy::key::kMetricsReportingEnabled);
DWORD value = 0;
// TODO(joshia): why hkcu_policy_key opens HKEY_LOCAL_MACHINE?
base::win::RegKey hkcu_policy_key(HKEY_LOCAL_MACHINE,
policy::kRegistrySubKey, KEY_READ);
if (hkcu_policy_key.ReadValueDW(key_name.c_str(), &value) == ERROR_SUCCESS) {
*result = value != 0;
return true;
}
base::win::RegKey hklm_policy_key(HKEY_CURRENT_USER,
policy::kRegistrySubKey, KEY_READ);
if (hklm_policy_key.ReadValueDW(key_name.c_str(), &value) == ERROR_SUCCESS) {
*result = value != 0;
return true;
}
return false;
}
static DWORD __stdcall InitCrashReporterThread(void* param) {
scoped_ptr<CrashReporterInfo> info(
reinterpret_cast<CrashReporterInfo*>(param));
bool is_per_user_install =
InstallUtil::IsPerUserInstall(info->dll_path.c_str());
std::wstring channel_string;
GoogleUpdateSettings::GetChromeChannelAndModifiers(!is_per_user_install,
&channel_string);
// GetCustomInfo can take a few milliseconds to get the file information, so
// we do it here so it can run in a separate thread.
info->custom_info = GetCustomInfo(info->dll_path, info->process_type,
channel_string);
google_breakpad::ExceptionHandler::MinidumpCallback callback = NULL;
LPTOP_LEVEL_EXCEPTION_FILTER default_filter = NULL;
// We install the post-dump callback only for the browser and service
// processes. It spawns a new browser/service process.
if (info->process_type == L"browser") {
callback = &DumpDoneCallback;
default_filter = &ChromeExceptionFilter;
} else if (info->process_type == L"service") {
callback = &DumpDoneCallback;
default_filter = &ServiceExceptionFilter;
}
// Check whether configuration management controls crash reporting.
bool crash_reporting_enabled = true;
bool controlled_by_policy =
MetricsReportingControlledByPolicy(&crash_reporting_enabled);
const CommandLine& command = *CommandLine::ForCurrentProcess();
bool use_crash_service = !controlled_by_policy &&
((command.HasSwitch(switches::kNoErrorDialogs) ||
GetEnvironmentVariable(
ASCIIToWide(env_vars::kHeadless).c_str(), NULL, 0)));
std::wstring pipe_name;
if (use_crash_service) {
// Crash reporting is done by crash_service.exe.
const wchar_t* var_name = L"CHROME_BREAKPAD_PIPE_NAME";
DWORD value_length = ::GetEnvironmentVariableW(var_name, NULL, 0);
if (value_length == 0) {
pipe_name = kChromePipeName;
} else {
scoped_array<wchar_t> value(new wchar_t[value_length]);
::GetEnvironmentVariableW(var_name, value.get(), value_length);
pipe_name = value.get();
}
} else {
// We want to use the Google Update crash reporting. We need to check if the
// user allows it first (in case the administrator didn't already decide
// via policy).
if (!controlled_by_policy)
crash_reporting_enabled = GoogleUpdateSettings::GetCollectStatsConsent();
if (!crash_reporting_enabled) {
// Configuration managed or the user did not allow Google Update to send
// crashes, we need to use our default crash handler instead, but only
// for the browser/service processes.
if (default_filter)
InitDefaultCrashCallback(default_filter);
return 0;
}
// Build the pipe name. It can be either:
// System-wide install: "NamedPipe\GoogleCrashServices\S-1-5-18"
// Per-user install: "NamedPipe\GoogleCrashServices\<user SID>"
std::wstring user_sid;
if (is_per_user_install) {
if (!base::win::GetUserSidString(&user_sid)) {
if (default_filter)
InitDefaultCrashCallback(default_filter);
return -1;
}
} else {
user_sid = kSystemPrincipalSid;
}
pipe_name = kGoogleUpdatePipeName;
pipe_name += user_sid;
}
// Get the alternate dump directory. We use the temp path.
wchar_t temp_dir[MAX_PATH] = {0};
::GetTempPathW(MAX_PATH, temp_dir);
MINIDUMP_TYPE dump_type = kSmallDumpType;
// Capture full memory if explicitly instructed to.
if (command.HasSwitch(switches::kFullMemoryCrashReport)) {
dump_type = kFullDumpType;
} else {
// Capture more detail in crash dumps for beta and dev channel builds.
if (channel_string == L"dev" || channel_string == L"beta" ||
channel_string == GoogleChromeSxSDistribution::ChannelName())
dump_type = kLargerDumpType;
}
g_breakpad = new google_breakpad::ExceptionHandler(temp_dir, &FilterCallback,
callback, NULL,
google_breakpad::ExceptionHandler::HANDLER_ALL,
dump_type, pipe_name.c_str(), info->custom_info);
if (!g_breakpad->IsOutOfProcess()) {
// The out-of-process handler is unavailable.
scoped_ptr<base::Environment> env(base::Environment::Create());
env->SetVar(env_vars::kNoOOBreakpad, WideToUTF8(info->process_type));
} else {
// Tells breakpad to handle breakpoint and single step exceptions.
// This might break JIT debuggers, but at least it will always
// generate a crashdump for these exceptions.
g_breakpad->set_handle_debug_exceptions(true);
}
return 0;
}
void InitDefaultCrashCallback(LPTOP_LEVEL_EXCEPTION_FILTER filter) {
previous_filter = SetUnhandledExceptionFilter(filter);
}
void InitCrashReporterWithDllPath(const std::wstring& dll_path) {
const CommandLine& command = *CommandLine::ForCurrentProcess();
if (!command.HasSwitch(switches::kDisableBreakpad)) {
// Disable the message box for assertions.
_CrtSetReportMode(_CRT_ASSERT, 0);
// Query the custom_info now because if we do it in the thread it's going to
// fail in the sandbox. The thread will delete this object.
CrashReporterInfo* info(new CrashReporterInfo);
info->process_type = command.GetSwitchValueNative(switches::kProcessType);
if (info->process_type.empty())
info->process_type = L"browser";
info->dll_path = dll_path;
// If this is not the browser, we can't be sure that we will be able to
// initialize the crash_handler in another thread, so we run it right away.
// This is important to keep the thread for the browser process because
// it may take some times to initialize the crash_service process. We use
// the Windows worker pool to make better reuse of the thread.
if (info->process_type != L"browser") {
InitCrashReporterThread(info);
} else {
if (QueueUserWorkItem(
&InitCrashReporterThread,
info,
WT_EXECUTELONGFUNCTION) == 0) {
// We failed to queue to the worker pool, initialize in this thread.
InitCrashReporterThread(info);
}
}
}
}