80195fc58d
Refactors the CompilerDispatcher to be able to enqueue eager inner functions for off-thread compilation during top-level compilation of a script. Unoptimized compile jobs are simplified to only have two phases - compile and finalization. Only finalization requires heap access (and therefore needs to be run on the main thread). The change also introduces a requirement to register a SFI with a given compile job after that job is posted, this is due to the fact that an SFI won't necessarily exist at the point the job is posted, but is created later when top-level compile is being finalized. Logic in the compile dispatcher is update to deal with the fact that a job may not be able to progress if it doesn't yet have an associated SFI registered with it. BUG=v8:8041 Change-Id: I66cccd626136738304a7cab0e501fc65cf342514 Reviewed-on: https://chromium-review.googlesource.com/1215782 Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/master@{#56088}
77 lines
2.7 KiB
C++
77 lines
2.7 KiB
C++
// Copyright 2016 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 "test/unittests/test-helpers.h"
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#include "include/v8.h"
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#include "src/api.h"
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#include "src/base/template-utils.h"
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#include "src/handles.h"
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#include "src/isolate.h"
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#include "src/objects-inl.h"
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#include "src/objects.h"
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#include "src/parsing/scanner-character-streams.h"
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#include "src/parsing/scanner.h"
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namespace v8 {
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namespace internal {
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namespace test {
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Handle<String> CreateSource(Isolate* isolate,
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ExternalOneByteString::Resource* maybe_resource) {
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if (!maybe_resource) {
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static const char test_script[] = "(x) { x*x; }";
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maybe_resource = new test::ScriptResource(test_script, strlen(test_script));
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}
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return isolate->factory()
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->NewExternalStringFromOneByte(maybe_resource)
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.ToHandleChecked();
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}
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Handle<SharedFunctionInfo> CreateSharedFunctionInfo(
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Isolate* isolate,
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v8::String::ExternalOneByteStringResource* maybe_resource) {
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HandleScope scope(isolate);
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Handle<String> source = CreateSource(isolate, maybe_resource);
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Handle<Script> script = isolate->factory()->NewScript(source);
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Handle<WeakFixedArray> infos = isolate->factory()->NewWeakFixedArray(3);
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script->set_shared_function_infos(*infos);
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Handle<SharedFunctionInfo> shared =
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isolate->factory()->NewSharedFunctionInfoForBuiltin(
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isolate->factory()->NewStringFromAsciiChecked("f"),
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Builtins::kCompileLazy);
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int function_literal_id = 1;
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// Ensure that the function can be compiled lazily.
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shared->set_uncompiled_data(
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*isolate->factory()->NewUncompiledDataWithoutPreParsedScope(
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ReadOnlyRoots(isolate).empty_string_handle(), 0, source->length(),
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function_literal_id));
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// Make sure we have an outer scope info, even though it's empty
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shared->set_raw_outer_scope_info_or_feedback_metadata(
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ScopeInfo::Empty(isolate));
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SharedFunctionInfo::SetScript(shared, script, function_literal_id);
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return scope.CloseAndEscape(shared);
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}
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std::unique_ptr<ParseInfo> OuterParseInfoForShared(
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Isolate* isolate, Handle<SharedFunctionInfo> shared) {
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Handle<Script> script =
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Handle<Script>::cast(handle(shared->script(), isolate));
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std::unique_ptr<ParseInfo> result =
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base::make_unique<ParseInfo>(isolate, script);
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// Create a character stream to simulate the parser having done so for the
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// to-level ParseProgram.
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Handle<String> source(String::cast(script->source()), isolate);
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std::unique_ptr<Utf16CharacterStream> stream(
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ScannerStream::For(isolate, source));
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result->set_character_stream(std::move(stream));
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return result;
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}
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} // namespace test
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} // namespace internal
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} // namespace v8
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