Add a basic compiler dispatcher

src/compiler-dispatcher/compiler-dispatcher-job.cc

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler-dispatcher/compiler-dispatcher-job.h"
 
 #include "src/assert-scope.h"
 #include "src/compilation-info.h"
 #include "src/compiler-dispatcher/compiler-dispatcher-tracer.h"
 #include "src/compiler.h"
 #include "src/global-handles.h"
 #include "src/isolate.h"
 #include "src/objects-inl.h"
 #include "src/parsing/parse-info.h"
 #include "src/parsing/parser.h"
 #include "src/parsing/scanner-character-streams.h"
 #include "src/unicode-cache.h"
 #include "src/zone/zone.h"
 
 namespace v8 {
 namespace internal {
 
 CompilerDispatcherJob::CompilerDispatcherJob(Isolate* isolate,
+                                             CompilerDispatcherTracer* tracer,
                                              Handle<SharedFunctionInfo> shared,
                                              size_t max_stack_size)
     : isolate_(isolate),
-      tracer_(isolate_->compiler_dispatcher_tracer()),
+      tracer_(tracer),
       shared_(Handle<SharedFunctionInfo>::cast(
           isolate_->global_handles()->Create(*shared))),
       max_stack_size_(max_stack_size),
       can_compile_on_background_thread_(false) {
   HandleScope scope(isolate_);
   DCHECK(!shared_->outer_scope_info()->IsTheHole(isolate_));
   Handle<Script> script(Script::cast(shared_->script()), isolate_);
   Handle<String> source(String::cast(script->source()), isolate_);
   can_parse_on_background_thread_ =
       source->IsExternalTwoByteString() || source->IsExternalOneByteString();
 }
 
 CompilerDispatcherJob::~CompilerDispatcherJob() {
   DCHECK(ThreadId::Current().Equals(isolate_->thread_id()));
   DCHECK(status_ == CompileJobStatus::kInitial ||
          status_ == CompileJobStatus::kDone);
   i::GlobalHandles::Destroy(Handle<Object>::cast(shared_).location());
 }
 
+bool CompilerDispatcherJob::IsProcessing(
+    Handle<SharedFunctionInfo> shared) const {
+  return *shared_ == *shared;
+}
+
 void CompilerDispatcherJob::PrepareToParseOnMainThread() {
   DCHECK(ThreadId::Current().Equals(isolate_->thread_id()));
   DCHECK(status() == CompileJobStatus::kInitial);
   COMPILER_DISPATCHER_TRACE_SCOPE(tracer_, kPrepareToParse);
   HandleScope scope(isolate_);
   unicode_cache_.reset(new UnicodeCache());
   zone_.reset(new Zone(isolate_->allocator(), ZONE_NAME));
   Handle<Script> script(Script::cast(shared_->script()), isolate_);
   DCHECK(script->type() != Script::TYPE_NATIVE);
 
@@ skipping 195 matching lines @@
   if (!source_.is_null()) {
     i::GlobalHandles::Destroy(Handle<Object>::cast(source_).location());
     source_ = Handle<String>::null();
   }
 
   status_ = CompileJobStatus::kInitial;
 }
 
 }  // namespace internal
 }  // namespace v8