ded2098436
This adds a new init-spawned daemon, webview_zygote, that starts a JVM and
acts as a zygote process for WebView isolated_app services.
Test: m
Test: angler boots
Test: Turn on Settings>Developer>Multiprocess Webview. webview_zygote32 or
webview_zygote64 start (requires dependent CLs).
Bug: 21643067
Change-Id: Ida98bd04b4d77736b672b03af651c4eb97ce88c1
77 lines
2.1 KiB
C++
77 lines
2.1 KiB
C++
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "WebViewZygote"
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#include <sys/prctl.h>
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#include <android_runtime/AndroidRuntime.h>
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#include <binder/IPCThreadState.h>
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#include <binder/ProcessState.h>
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#include <utils/Log.h>
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#include <utils/String8.h>
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#include <utils/Vector.h>
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namespace android {
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class WebViewRuntime : public AndroidRuntime {
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public:
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WebViewRuntime(char* argBlockStart, size_t argBlockSize)
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: AndroidRuntime(argBlockStart, argBlockSize) {}
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~WebViewRuntime() override {}
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void onStarted() override {
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// Nothing to do since this is a zygote server.
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}
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void onVmCreated(JNIEnv*) override {
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// Nothing to do when the VM is created in the zygote.
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}
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void onZygoteInit() override {
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// Called after a new process is forked.
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sp<ProcessState> proc = ProcessState::self();
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proc->startThreadPool();
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}
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void onExit(int code) override {
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IPCThreadState::self()->stopProcess();
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AndroidRuntime::onExit(code);
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}
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};
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} // namespace android
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int main(int argc, char* const argv[]) {
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if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) < 0) {
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LOG_ALWAYS_FATAL("PR_SET_NO_NEW_PRIVS failed: %s", strerror(errno));
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return 12;
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}
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size_t argBlockSize = 0;
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for (int i = 0; i < argc; ++i) {
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argBlockSize += strlen(argv[i]) + 1;
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}
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android::WebViewRuntime runtime(argv[0], argBlockSize);
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runtime.addOption("-Xzygote");
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android::Vector<android::String8> args;
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runtime.start("com.android.internal.os.WebViewZygoteInit", args, /*zygote=*/ true);
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}
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