blob: cd0db55e6a6d6402c7cee628d42af4f6ed75c935 [file] [log] [blame]
// Copyright 2015 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 "android_webview/common/crash_reporter/aw_crash_reporter_client.h"
#include <stdint.h>
#include "android_webview/common/aw_descriptors.h"
#include "android_webview/common/aw_paths.h"
#include "android_webview/common/aw_switches.h"
#include "android_webview/common/crash_reporter/crash_keys.h"
#include "base/android/build_info.h"
#include "base/base_paths_android.h"
#include "base/base_switches.h"
#include "base/command_line.h"
#include "base/lazy_instance.h"
#include "base/logging.h"
#include "base/path_service.h"
#include "base/scoped_native_library.h"
#include "build/build_config.h"
#include "components/crash/content/app/crash_reporter_client.h"
#include "components/crash/content/app/crashpad.h"
#include "components/version_info/android/channel_getter.h"
#include "components/version_info/version_info.h"
#include "components/version_info/version_info_values.h"
namespace android_webview {
constexpr unsigned int kCrashDumpPercentageForStable = 1;
namespace {
class AwCrashReporterClient : public crash_reporter::CrashReporterClient {
AwCrashReporterClient() {}
// crash_reporter::CrashReporterClient implementation.
bool IsRunningUnattended() override { return false; }
bool GetCollectStatsConsent() override {
// TODO(jperaza): Crashpad uses GetCollectStatsConsent() to enable or
// disable upload of crash reports. However, Crashpad does not yet support
// upload on Android, so this return value currently has no effect and
// WebView's own uploader will determine consent before uploading. If and
// when Crashpad supports upload on Android, consent can be determined here,
// or WebView can continue uploading reports itself.
return false;
void GetProductNameAndVersion(std::string* product_name,
std::string* version,
std::string* channel) override {
*product_name = "AndroidWebView";
*channel =
bool GetCrashDumpLocation(base::FilePath* crash_dir) override {
return base::PathService::Get(android_webview::DIR_CRASH_DUMPS, crash_dir);
void GetSanitizationInformation(const char* const** annotations_whitelist,
void** target_module,
bool* sanitize_stacks) override {
*annotations_whitelist = crash_keys::kWebViewCrashKeyWhiteList;
#if defined(COMPONENT_BUILD)
*target_module = nullptr;
*target_module = reinterpret_cast<void*>(&EnableCrashReporter);
*sanitize_stacks = true;
unsigned int GetCrashDumpPercentage() override {
if (base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kEnableCrashReporterForTesting)) {
return 100;
version_info::Channel channel = version_info::android::GetChannel();
// Downsample unknown channel as a precaution in case it ends up being
// shipped.
if (channel == version_info::Channel::STABLE ||
channel == version_info::Channel::UNKNOWN) {
return kCrashDumpPercentageForStable;
return 100;
bool GetBrowserProcessType(std::string* ptype) override {
*ptype = base::CommandLine::ForCurrentProcess()->HasSwitch(
? "browser"
: "webview";
return true;
base::LazyInstance<AwCrashReporterClient>::Leaky g_crash_reporter_client =
#if defined(ARCH_CPU_X86_FAMILY)
bool SafeToUseSignalHandler() {
// N+ shared library namespacing means that we are unable to dlopen
// libnativebridge (because it isn't in the NDK). However we know
// that, were we able to, the tests below would pass, so just return
// true here.
if (base::android::BuildInfo::GetInstance()->sdk_int() >=
base::android::SDK_VERSION_NOUGAT) {
return true;
// On X86/64 there are binary translators that handle SIGSEGV in userspace and
// may get chained after our handler - see
// We attempt to detect this to work out when it's safe to install breakpad.
// If anything doesn't seem right we assume it's not safe.
// type and mangled name of android::NativeBridgeInitialized
typedef bool (*InitializedFunc)();
const char kInitializedSymbol[] = "_ZN7android23NativeBridgeInitializedEv";
// type and mangled name of android::NativeBridgeGetVersion
typedef uint32_t (*VersionFunc)();
const char kVersionSymbol[] = "_ZN7android22NativeBridgeGetVersionEv";
base::ScopedNativeLibrary lib_native_bridge(
if (!lib_native_bridge.is_valid()) {
DLOG(WARNING) << "Couldn't load libnativebridge";
return false;
InitializedFunc NativeBridgeInitialized = reinterpret_cast<InitializedFunc>(
if (NativeBridgeInitialized == nullptr) {
DLOG(WARNING) << "Couldn't tell if native bridge initialized";
return false;
if (!NativeBridgeInitialized()) {
// Native process, safe to use breakpad.
return true;
VersionFunc NativeBridgeGetVersion = reinterpret_cast<VersionFunc>(
if (NativeBridgeGetVersion == nullptr) {
DLOG(WARNING) << "Couldn't get native bridge version";
return false;
uint32_t version = NativeBridgeGetVersion();
if (version >= 2) {
// Native bridge at least version 2, safe to use breakpad.
return true;
} else {
DLOG(WARNING) << "Native bridge ver=" << version << "; too low";
return false;
bool g_enabled;
} // namespace
void EnableCrashReporter(const std::string& process_type) {
if (g_enabled) {
NOTREACHED() << "EnableCrashReporter called more than once";
#if defined(ARCH_CPU_X86_FAMILY)
if (!SafeToUseSignalHandler()) {
LOG(WARNING) << "Can't use breakpad to handle WebView crashes";
AwCrashReporterClient* client = g_crash_reporter_client.Pointer();
crash_reporter::InitializeCrashpad(process_type.empty(), process_type);
g_enabled = true;
bool CrashReporterEnabled() {
return g_enabled;
} // namespace android_webview