dc45361e53
This is a reland of e95e1b6234
After landing https://crrev.com/c/2546682, this CL can be relanded
without changes.
Original change's description:
> [heap] Introduce LocalIsolate for main thread
>
> Add a LocalIsolate for the main thread to Isolate. This LocalIsolate is
> kept alive during the whole lifetime of the Isolate. The main thread
> LocalIsolate starts in the Running state in contrast to the background
> thread LocalIsolates (those start in Parked).
>
> Code paths in Turbofan that used to create a LocalIsolate on the main
> thread can now simply use the main thread LocalIsolate.
>
> LocalIsolate for the main thread will help in reducing differences
> between the main and background threads. The goal is that the main
> thread behaves more like a background thread.
>
> The main thread LocalIsolate should also make it simpler to share code
> between main thread and background threads by using LocalIsolate for
> both.
>
> Bug: v8:10315
> Change-Id: I7fd61d305a6fd7079e2319d75c291c1021e70018
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2509593
> Reviewed-by: Simon Zünd <szuend@chromium.org>
> Reviewed-by: Yang Guo <yangguo@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#71226}
Bug: v8:10315
Change-Id: I418b1217aeac4f3c44a0aa514dea9864f8a58656
TBR: szuend@chromium.org, yangguo@chromium.org, ulan@chromium.org, leszeks@chromium.org, neis@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2543399
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71274}
77 lines
1.8 KiB
C++
77 lines
1.8 KiB
C++
// Copyright 2020 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "src/heap/local-heap.h"
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#include "src/heap/heap.h"
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#include "src/heap/safepoint.h"
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#include "test/unittests/test-utils.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace v8 {
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namespace internal {
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using LocalHeapTest = TestWithIsolate;
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TEST_F(LocalHeapTest, Initialize) {
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Heap* heap = i_isolate()->heap();
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CHECK(heap->safepoint()->ContainsAnyLocalHeap());
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}
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TEST_F(LocalHeapTest, Current) {
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Heap* heap = i_isolate()->heap();
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CHECK_NULL(LocalHeap::Current());
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{
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LocalHeap lh(heap, ThreadKind::kMain);
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CHECK_NULL(LocalHeap::Current());
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}
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CHECK_NULL(LocalHeap::Current());
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{
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LocalHeap lh(heap, ThreadKind::kMain);
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CHECK_NULL(LocalHeap::Current());
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}
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CHECK_NULL(LocalHeap::Current());
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}
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namespace {
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class BackgroundThread final : public v8::base::Thread {
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public:
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explicit BackgroundThread(Heap* heap)
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: v8::base::Thread(base::Thread::Options("BackgroundThread")),
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heap_(heap) {}
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void Run() override {
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CHECK_NULL(LocalHeap::Current());
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{
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LocalHeap lh(heap_, ThreadKind::kBackground);
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CHECK_EQ(&lh, LocalHeap::Current());
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}
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CHECK_NULL(LocalHeap::Current());
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}
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Heap* heap_;
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};
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} // anonymous namespace
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TEST_F(LocalHeapTest, CurrentBackground) {
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Heap* heap = i_isolate()->heap();
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CHECK_NULL(LocalHeap::Current());
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{
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LocalHeap lh(heap, ThreadKind::kMain);
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auto thread = std::make_unique<BackgroundThread>(heap);
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CHECK(thread->Start());
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CHECK_NULL(LocalHeap::Current());
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thread->Join();
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CHECK_NULL(LocalHeap::Current());
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}
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CHECK_NULL(LocalHeap::Current());
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}
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} // namespace internal
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} // namespace v8
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