// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "android_webview/lib/aw_main_delegate.h"
#include <memory>
#include "android_webview/browser/aw_content_browser_client.h"
#include "android_webview/browser/aw_media_url_interceptor.h"
#include "android_webview/browser/gfx/aw_draw_fn_impl.h"
#include "android_webview/browser/gfx/browser_view_renderer.h"
#include "android_webview/browser/gfx/gpu_service_webview.h"
#include "android_webview/browser/gfx/viz_compositor_thread_runner_webview.h"
#include "android_webview/browser/tracing/aw_trace_event_args_allowlist.h"
#include "android_webview/common/aw_descriptors.h"
#include "android_webview/common/aw_features.h"
#include "android_webview/common/aw_paths.h"
#include "android_webview/common/aw_resource_bundle.h"
#include "android_webview/common/aw_switches.h"
#include "android_webview/common/crash_reporter/aw_crash_reporter_client.h"
#include "android_webview/common/crash_reporter/crash_keys.h"
#include "android_webview/gpu/aw_content_gpu_client.h"
#include "android_webview/renderer/aw_content_renderer_client.h"
#include "base/android/apk_assets.h"
#include "base/android/build_info.h"
#include "base/check_op.h"
#include "base/command_line.h"
#include "base/cpu.h"
#include "base/functional/bind.h"
#include "base/i18n/icu_util.h"
#include "base/i18n/rtl.h"
#include "base/posix/global_descriptors.h"
#include "base/scoped_add_feature_flags.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/threading/thread_restrictions.h"
#include "build/build_config.h"
#include "cc/base/switches.h"
#include "components/autofill/core/common/autofill_features.h"
#include "components/crash/core/common/crash_key.h"
#include "components/embedder_support/switches.h"
#include "components/memory_system/initializer.h"
#include "components/memory_system/parameters.h"
#include "components/metrics/unsent_log_store_metrics.h"
#include "components/safe_browsing/android/safe_browsing_api_handler_bridge.h"
#include "components/services/heap_profiling/public/cpp/profiling_client.h"
#include "components/spellcheck/spellcheck_buildflags.h"
#include "components/variations/variations_ids_provider.h"
#include "components/version_info/android/channel_getter.h"
#include "components/viz/common/features.h"
#include "content/public/app/initialize_mojo_core.h"
#include "content/public/browser/android/media_url_interceptor_register.h"
#include "content/public/browser/browser_main_runner.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/network_service_util.h"
#include "content/public/common/content_descriptor_keys.h"
#include "content/public/common/content_features.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/main_function_params.h"
#include "device/base/features.h"
#include "gin/public/isolate_holder.h"
#include "gin/v8_initializer.h"
#include "gpu/command_buffer/service/gpu_switches.h"
#include "gpu/config/gpu_finch_features.h"
#include "media/media_buildflags.h"
#include "net/base/features.h"
#include "third_party/abseil-cpp/absl/types/variant.h"
#include "third_party/blink/public/common/features.h"
#include "third_party/blink/public/common/switches.h"
#include "tools/v8_context_snapshot/buildflags.h"
#include "ui/base/ui_base_paths.h"
#include "ui/base/ui_base_switches.h"
#include "ui/events/gesture_detection/gesture_configuration.h"
#include "ui/gl/gl_switches.h"
#if BUILDFLAG(ENABLE_SPELLCHECK)
#include "components/spellcheck/common/spellcheck_features.h"
#endif // ENABLE_SPELLCHECK
namespace android_webview {
AwMainDelegate::AwMainDelegate() = default;
AwMainDelegate::~AwMainDelegate() = default;
std::optional<int> AwMainDelegate::BasicStartupComplete() {
TRACE_EVENT0("startup", "AwMainDelegate::BasicStartupComplete");
base::CommandLine* cl = base::CommandLine::ForCurrentProcess();
// WebView uses the Android system's scrollbars and overscroll glow.
cl->AppendSwitch(switches::kDisableOverscrollEdgeEffect);
// Pull-to-refresh should never be a default WebView action.
cl->AppendSwitch(switches::kDisablePullToRefreshEffect);
// Not yet supported in single-process mode.
cl->AppendSwitch(switches::kDisableSharedWorkers);
// File system API not supported (requires some new API; internal bug 6930981)
cl->AppendSwitch(switches::kDisableFileSystem);
// Web Notification API and the Push API are not supported (crbug.com/434712)
cl->AppendSwitch(switches::kDisableNotifications);
// Check damage in OnBeginFrame to prevent unnecessary draws.
cl->AppendSwitch(cc::switches::kCheckDamageEarly);
// This is needed for sharing textures across the different GL threads.
cl->AppendSwitch(switches::kEnableThreadedTextureMailboxes);
// WebView does not yet support screen orientation locking.
cl->AppendSwitch(switches::kDisableScreenOrientationLock);
// WebView does not currently support Web Speech Synthesis API,
// but it does support Web Speech Recognition API (crbug.com/487255).
cl->AppendSwitch(switches::kDisableSpeechSynthesisAPI);
// WebView does not (yet) save Chromium data during shutdown, so add setting
// for Chrome to aggressively persist DOM Storage to minimize data loss.
// http://crbug.com/479767
cl->AppendSwitch(switches::kEnableAggressiveDOMStorageFlushing);
// Webview does not currently support the Presentation API, see
// https://crbug.com/521319
cl->AppendSwitch(switches::kDisablePresentationAPI);
// WebView doesn't support Remote Playback API for the same reason as the
// Presentation API, see https://crbug.com/521319.
cl->AppendSwitch(switches::kDisableRemotePlaybackAPI);
// WebView does not support MediaSession API since there's no UI for media
// metadata and controls.
cl->AppendSwitch(switches::kDisableMediaSessionAPI);
// We have crash dumps to diagnose regressions in remote font analysis or cc
// serialization errors but most of their utility is in identifying URLs where
// the regression occurs. This info is not available for webview so there
// isn't much point in having the crash dumps there.
cl->AppendSwitch(switches::kDisableOoprDebugCrashDump);
// Deemed that performance benefit is not worth the stability cost.
// See crbug.com/1309151.
cl->AppendSwitch(switches::kDisableGpuShaderDiskCache);
// Keep data: URL support in SVGUseElement for webview until deprecation is
// completed in the Web Platform.
cl->AppendSwitch(blink::switches::kDataUrlInSvgUseEnabled);
if (cl->GetSwitchValueASCII(switches::kProcessType).empty()) {
// Browser process (no type specified).
content::RegisterMediaUrlInterceptor(new AwMediaUrlInterceptor());
BrowserViewRenderer::CalculateTileMemoryPolicy();
if (AwDrawFnImpl::IsUsingVulkan())
cl->AppendSwitch(switches::kWebViewDrawFunctorUsesVulkan);
#ifdef V8_USE_EXTERNAL_STARTUP_DATA
#if !BUILDFLAG(USE_V8_CONTEXT_SNAPSHOT) || BUILDFLAG(INCLUDE_BOTH_V8_SNAPSHOTS)
base::android::RegisterApkAssetWithFileDescriptorStore(
content::kV8Snapshot32DataDescriptor,
gin::V8Initializer::GetSnapshotFilePath(
true, gin::V8SnapshotFileType::kDefault));
base::android::RegisterApkAssetWithFileDescriptorStore(
content::kV8Snapshot64DataDescriptor,
gin::V8Initializer::GetSnapshotFilePath(
false, gin::V8SnapshotFileType::kDefault));
#endif
#if BUILDFLAG(USE_V8_CONTEXT_SNAPSHOT)
base::android::RegisterApkAssetWithFileDescriptorStore(
content::kV8ContextSnapshot32DataDescriptor,
gin::V8Initializer::GetSnapshotFilePath(
true, gin::V8SnapshotFileType::kWithAdditionalContext));
base::android::RegisterApkAssetWithFileDescriptorStore(
content::kV8ContextSnapshot64DataDescriptor,
gin::V8Initializer::GetSnapshotFilePath(
false, gin::V8SnapshotFileType::kWithAdditionalContext));
#endif
#endif // V8_USE_EXTERNAL_STARTUP_DATA
}
if (cl->HasSwitch(switches::kWebViewSandboxedRenderer)) {
cl->AppendSwitch(switches::kInProcessGPU);
}
{
// TODO(crbug.com/40271903): Consider to migrate all the following overrides
// to the new mechanism in android_webview/browser/aw_field_trials.cc.
base::ScopedAddFeatureFlags features(cl);
if (cl->HasSwitch(switches::kWebViewLogJsConsoleMessages)) {
features.EnableIfNotSet(::features::kLogJsConsoleMessages);
}
if (!cl->HasSwitch(switches::kWebViewDrawFunctorUsesVulkan)) {
// Not use ANGLE's Vulkan backend, if the draw functor is not using
// Vulkan.
features.DisableIfNotSet(::features::kDefaultANGLEVulkan);
}
if (cl->HasSwitch(switches::kWebViewFencedFrames)) {
features.EnableIfNotSet(blink::features::kFencedFrames);
features.EnableIfNotSet(blink::features::kFencedFramesAPIChanges);
features.EnableIfNotSet(blink::features::kFencedFramesDefaultMode);
features.EnableIfNotSet(::features::kFencedFramesEnforceFocus);
features.EnableIfNotSet(::features::kPrivacySandboxAdsAPIsOverride);
}
features.EnableIfNotSet(metrics::kRecordLastUnsentLogMetadataMetrics);
// Enabled by default for webview.
features.EnableIfNotSet(::features::kWebViewThreadSafeMediaDefault);
// WebView uses kWebViewFrameRateHints to control this. Not using
// AwFieldTrials::RegisterFeatureOverrides to avoid misconfiguring
// experimients accidentally enabling kUseFrameIntervalDecider for WebView.
features.DisableIfNotSet(::features::kUseFrameIntervalDecider);
}
android_webview::RegisterPathProvider();
// Used only if the argument filter is enabled in tracing config,
// as is the case by default in aw_tracing_controller.cc
base::trace_event::TraceLog::GetInstance()->SetArgumentFilterPredicate(
base::BindRepeating(&IsTraceEventArgsAllowlisted));
base::trace_event::TraceLog::GetInstance()->SetMetadataFilterPredicate(
base::BindRepeating(&IsTraceMetadataAllowlisted));
base::trace_event::TraceLog::GetInstance()->SetRecordHostAppPackageName(true);
// The TLS slot used by the memlog allocator shim needs to be initialized
// early to ensure that it gets assigned a low slot number. If it gets
// initialized too late, the glibc TLS system will require a malloc call in
// order to allocate storage for a higher slot number. Since malloc is hooked,
// this causes re-entrancy into the allocator shim, while the TLS object is
// partially-initialized, which the TLS object is supposed to protect again.
heap_profiling::InitTLSSlot();
// Have the network service in the browser process even if we have separate
// renderer processes. See also: switches::kInProcessGPU above.
content::ForceInProcessNetworkService();
return std::nullopt;
}
void AwMainDelegate::PreSandboxStartup() {
TRACE_EVENT0("startup", "AwMainDelegate::PreSandboxStartup");
#if defined(ARCH_CPU_ARM_FAMILY)
// Create an instance of the CPU class to parse /proc/cpuinfo and cache
// cpu_brand info.
base::CPU cpu_info;
#endif
const base::CommandLine& command_line =
*base::CommandLine::ForCurrentProcess();
std::string process_type =
command_line.GetSwitchValueASCII(switches::kProcessType);
const bool is_browser_process = process_type.empty();
if (!is_browser_process) {
base::i18n::SetICUDefaultLocale(
command_line.GetSwitchValueASCII(switches::kLang));
}
if (process_type == switches::kRendererProcess) {
InitResourceBundleRendererSide();
}
EnableCrashReporter(process_type);
base::android::BuildInfo* android_build_info =
base::android::BuildInfo::GetInstance();
static ::crash_reporter::CrashKeyString<64> app_name_key(
crash_keys::kAppPackageName);
app_name_key.Set(android_build_info->host_package_name());
static ::crash_reporter::CrashKeyString<64> app_version_key(
crash_keys::kAppPackageVersionCode);
app_version_key.Set(android_build_info->host_version_code());
static ::crash_reporter::CrashKeyString<8> sdk_int_key(
crash_keys::kAndroidSdkInt);
sdk_int_key.Set(base::NumberToString(android_build_info->sdk_int()));
}
absl::variant<int, content::MainFunctionParams> AwMainDelegate::RunProcess(
const std::string& process_type,
content::MainFunctionParams main_function_params) {
// Defer to the default main method outside the browser process.
if (!process_type.empty())
return std::move(main_function_params);
browser_runner_ = content::BrowserMainRunner::Create();
int exit_code = browser_runner_->Initialize(std::move(main_function_params));
// We do not expect Initialize() to ever fail in AndroidWebView. On success
// it returns a negative value but we do not want to use that on Android.
DCHECK_LT(exit_code, 0);
return 0;
}
void AwMainDelegate::ProcessExiting(const std::string& process_type) {
// TODO(torne): Clean up resources when we handle them.
logging::CloseLogFile();
}
bool AwMainDelegate::ShouldCreateFeatureList(InvokedIn invoked_in) {
// In the browser process the FeatureList is created in
// AwMainDelegate::PostEarlyInitialization().
return absl::holds_alternative<InvokedInChildProcess>(invoked_in);
}
bool AwMainDelegate::ShouldInitializeMojo(InvokedIn invoked_in) {
return ShouldCreateFeatureList(invoked_in);
}
variations::VariationsIdsProvider*
AwMainDelegate::CreateVariationsIdsProvider() {
return variations::VariationsIdsProvider::Create(
variations::VariationsIdsProvider::Mode::kDontSendSignedInVariations);
}
std::optional<int> AwMainDelegate::PostEarlyInitialization(
InvokedIn invoked_in) {
const bool is_browser_process =
absl::holds_alternative<InvokedInBrowserProcess>(invoked_in);
if (is_browser_process) {
InitIcuAndResourceBundleBrowserSide();
aw_feature_list_creator_->CreateFeatureListAndFieldTrials();
content::InitializeMojoCore();
// WebView apps can override WebView#computeScroll to achieve custom
// scroll/fling. As a result, fling animations may not be ticked,
// potentially
// confusing the tap suppression controller. Simply disable it for WebView
if (!base::FeatureList::IsEnabled(
::features::kWebViewSuppressTapDuringFling)) {
ui::GestureConfiguration::GetInstance()
->set_fling_touchscreen_tap_suppression_enabled(false);
}
}
InitializeMemorySystem(is_browser_process);
return std::nullopt;
}
content::ContentClient* AwMainDelegate::CreateContentClient() {
return &content_client_;
}
content::ContentBrowserClient* AwMainDelegate::CreateContentBrowserClient() {
DCHECK(!aw_feature_list_creator_);
aw_feature_list_creator_ = std::make_unique<AwFeatureListCreator>();
content_browser_client_ =
std::make_unique<AwContentBrowserClient>(aw_feature_list_creator_.get());
return content_browser_client_.get();
}
namespace {
gpu::SyncPointManager* GetSyncPointManager() {
DCHECK(GpuServiceWebView::GetInstance());
return GpuServiceWebView::GetInstance()->sync_point_manager();
}
gpu::SharedImageManager* GetSharedImageManager() {
DCHECK(GpuServiceWebView::GetInstance());
return GpuServiceWebView::GetInstance()->shared_image_manager();
}
gpu::Scheduler* GetScheduler() {
DCHECK(GpuServiceWebView::GetInstance());
return GpuServiceWebView::GetInstance()->scheduler();
}
viz::VizCompositorThreadRunner* GetVizCompositorThreadRunner() {
return VizCompositorThreadRunnerWebView::GetInstance();
}
} // namespace
content::ContentGpuClient* AwMainDelegate::CreateContentGpuClient() {
content_gpu_client_ = std::make_unique<AwContentGpuClient>(
base::BindRepeating(&GetSyncPointManager),
base::BindRepeating(&GetSharedImageManager),
base::BindRepeating(&GetScheduler),
base::BindRepeating(&GetVizCompositorThreadRunner));
return content_gpu_client_.get();
}
content::ContentRendererClient* AwMainDelegate::CreateContentRendererClient() {
content_renderer_client_ = std::make_unique<AwContentRendererClient>();
return content_renderer_client_.get();
}
void AwMainDelegate::InitializeMemorySystem(const bool is_browser_process) {
const version_info::Channel channel = version_info::android::GetChannel();
const bool is_canary_dev = (channel == version_info::Channel::CANARY ||
channel == version_info::Channel::DEV);
const std::string process_type =
base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
switches::kProcessType);
const bool gwp_asan_boost_sampling = is_canary_dev || is_browser_process;
// Add PoissonAllocationSampler. On Android WebView we do not have obvious
// observers of PoissonAllocationSampler. Unfortunately, some potential
// candidates are still linked and may sneak in through hidden paths.
// Therefore, we include PoissonAllocationSampler unconditionally.
// TODO(crbug.com/40062835): Which observers of PoissonAllocationSampler are
// really in use on Android WebView? Can we add the sampler conditionally or
// remove it completely?
memory_system::Initializer()
.SetGwpAsanParameters(gwp_asan_boost_sampling, process_type)
.SetDispatcherParameters(memory_system::DispatcherParameters::
PoissonAllocationSamplerInclusion::kEnforce,
memory_system::DispatcherParameters::
AllocationTraceRecorderInclusion::kIgnore,
process_type)
.Initialize(memory_system_);
}
} // namespace android_webview
Codebase Browser
chromium