How to enable android webview shell in multi-process mode

[heh...@sohu.com]

HI

   Android webview shell can work well in defalult single process mode.I added AwSwitches.WEBVIEW_SANDBOXED_RENDERER property in command line but render process can't launched. Anybody knows how to enable multi-process mode? Thanks

[Torne (Richard Coles)]

We run many of our instrumentation tests in multiprocess mode using the test shell, and the test runner does this by adding the command line flag AwSwitches.WEBVIEW_SANDBOXED_RENDERER as you mention. So, this is the correct way to enable it and we have continuous testing that it does in fact work.

To help we would need to know exactly what you are doing and what actually happens when you try it

On Tue, 12 Aug 2025 at 04:22, 'heh...@sohu.com' via android-webview-dev <android-w...@chromium.org> wrote:

HI

   Android webview shell can work well in defalult single process mode.I added AwSwitches.WEBVIEW_SANDBOXED_RENDERER property in command line but render process can't launched. Anybody knows how to enable multi-process mode? Thanks

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[Torne (Richard Coles)]

On Wed, 13 Aug 2025 at 08:30, hu song <heh...@gmail.com> wrote:

chromium version is 128.0.6613.138

I'd suggest not using such an old version as there are many known security issues, but it's probably not related to this issue.

 

In AwShellActivity.java, I add  CommandLine.getInstance().appendSwitch(AwSwitches.WEBVIEW_SANDBOXED_RENDERER);

 @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        CommandLine.getInstance().appendSwitch(AwSwitches.WEBVIEW_SANDBOXED_RENDERER);

        ....................................

}

I input web address, no webpage just a black screen.

We'd need to see the log output.

[hu song]

Chromium version is 128.0.6613.138

In AwShellActivity.java, I add  CommandLine.getInstance().appendSwitch(AwSwitches.WEBVIEW_SANDBOXED_RENDERER);

@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        CommandLine.getInstance().appendSwitch(AwSwitches.WEBVIEW_SANDBOXED_RENDERER);

        AwShellResourceProvider.registerResources(this);

        ..........................

}

When I input web address, no webpage display just a black screen.

在2025年8月13日星期三 UTC+8 02:30:16<to...@chromium.org> 写道：

[heh...@sohu.com]

chromium version is 128.0.6613.138

In AwShellActivity.java, I modiy as follow

@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        CommandLine.getInstance().appendSwitch(AwSwitches.WEBVIEW_SANDBOXED_RENDERER);
        AwShellResourceProvider.registerResources(this);

        ...........
     }

When i input a web address, no webpage display, just a black screen.

在2025年8月13日星期三 UTC+8 02:30:16<to...@chromium.org> 写道：

[hu song]

chromium version is 128.0.6613.138

In AwShellActivity.java, I add  CommandLine.getInstance().appendSwitch(AwSwitches.WEBVIEW_SANDBOXED_RENDERER);

 @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        CommandLine.getInstance().appendSwitch(AwSwitches.WEBVIEW_SANDBOXED_RENDERER);

        ....................................

}

I input web address, no webpage just a black screen.

 

在2025年8月13日星期三 UTC+8 02:30:16<to...@chromium.org> 写道：

[heh...@sohu.com]

Stack Trace:

RELADDR FUNCTION FILE:LINE

v------> base::ImmediateCrash() ../../base/immediate_crash.h:176:3

0000000000511fe8 logging::LogMessage::HandleFatal(unsigned long, std::__Cr::basic_string, std::__Cr::allocator> const&) const ../../base/logging.cc:1073:5

v------> logging::LogMessage::Flush()::$_0::operator()() const ../../base/logging.cc:773:7

v------> absl::cleanup_internal::Storage::InvokeCallback() ../../third_party/abseil-cpp/absl/cleanup/internal/cleanup.h:87:5

v------> absl::Cleanup::~Cleanup() ../../third_party/abseil-cpp/absl/cleanup/cleanup.h:106:16

0000000000511ae0 logging::LogMessage::Flush() ../../base/logging.cc:956:1

00000000005120cc logging::LogMessageFatal::~LogMessageFatal() ../../base/logging.cc:1078:3

000000000207a498 (anonymous namespace)::NativeInit(base::android::LibraryProcessType) ../../android_webview/lib/webview_entry_point.cc:0:0

v------> base::android::JNI_LibraryLoader_LibraryLoaded(_JNIEnv*, int) ../../base/android/library_loader/library_loader_hooks.cc:85:8

00000000006490c0 Java_org_jni_1zero_GEN_1JNI_org_1chromium_1base_1library_11loader_1LibraryLoader_1libraryLoaded gen/jni_headers/base/library_loader_jni/LibraryLoader_jni.h:23:15

00000000016c284a org.chromium.base.library_loader.LibraryLoaderJni.libraryLoaded+0 /data/app/~~BUJipleVTerhYx6-TXaAFA==/org.chromium.android_webview.shell-A-R3uKbq2ub52kY6SnsuQQ==/oat/arm64/base.vdex

00000000016c2c1c org.chromium.base.library_loader.LibraryLoader.initializeAlreadyLocked+84 /data/app/~~BUJipleVTerhYx6-TXaAFA==/org.chromium.android_webview.shell-A-R3uKbq2ub52kY6SnsuQQ==/oat/arm64/base.vdex

00000000016c2ba6 org.chromium.base.library_loader.LibraryLoader.initialize+6 /data/app/~~BUJipleVTerhYx6-TXaAFA==/org.chromium.android_webview.shell-A-R3uKbq2ub52kY6SnsuQQ==/oat/arm64/base.vdex

0000000001c98afc org.chromium.content.app.ContentChildProcessServiceDelegate.initializeLibrary+8 /data/app/~~BUJipleVTerhYx6-TXaAFA==/org.chromium.android_webview.shell-A-R3uKbq2ub52kY6SnsuQQ==/oat/arm64/base.vdex

0000000001c98b68 org.chromium.content.app.ContentChildProcessServiceDelegate.loadNativeLibrary+56 /data/app/~~BUJipleVTerhYx6-TXaAFA==/org.chromium.android_webview.shell-A-R3uKbq2ub52kY6SnsuQQ==/oat/arm64/base.vdex

00000000016c9530 org.chromium.base.process_launcher.ChildProcessService.mainThreadMain+90 /data/app/~~BUJipleVTerhYx6-TXaAFA==/org.chromium.android_webview.shell-A-R3uKbq2ub52kY6SnsuQQ==/oat/arm64/base.vdex

00000000016c9448 org.chromium.base.process_launcher.ChildProcessService.$r8$lambda$9K0JhFLsfd8uhqRrzhzHqRdfAbA+0 /data/app/~~BUJipleVTerhYx6-TXaAFA==/org.chromium.android_webview.shell-A-R3uKbq2ub52kY6SnsuQQ==/oat/arm64/base.vdex

00000000016c8eb0 org.chromium.base.process_launcher.ChildProcessService$$ExternalSyntheticLambda0.run+4 /data/app/~~BUJipleVTerhYx6-TXaAFA==/org.chromium.android_webview.shell-A-R3uKbq2ub52kY6SnsuQQ==/oat/arm64/base.vdex

[Torne (Richard Coles)]

This indicates that it's crashing due to printing a FATAL level log message. You should look at what that message says.

To get help you should share the entire log output, not just one snippet.

To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/android-webview-dev/1645b9b0-d031-4a9e-9c32-dd0155d45ee9n%40chromium.org.