johnmccutchan@google.com
850074a704
- Each isolate starts off with a 'Default' UserTag set.
- A null tag cannot be set.
- Calls to clearCurrentTag() should be replaced with a call to UserTag.defaultTag.makeCurrent().
- makeCurrent returns the previously current tag.
This allows for the following pattern to work:
callee() {
var old = calleeTag.makeCurrent();
...
old.makeCurrent();
}
caller() {
var old = callerTag.makeCurrent();
...
callee();
assert(getCurrentTag() == callerTag);
...
old.makeCurrent();
}
R=iposva@google.com, zra@google.com
Review URL: https://codereview.chromium.org//266913010
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@35810 260f80e4-7a28-3924-810f-c04153c831b5
62 lines
1.6 KiB
C++
62 lines
1.6 KiB
C++
// Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/bootstrap_natives.h"
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#include "include/dart_api.h"
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#include "vm/bigint_operations.h"
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#include "vm/exceptions.h"
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#include "vm/native_entry.h"
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#include "vm/object.h"
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#include "vm/object_store.h"
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namespace dart {
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DECLARE_FLAG(bool, trace_intrinsified_natives);
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// dart:profiler.
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DEFINE_NATIVE_ENTRY(UserTag_new, 2) {
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ASSERT(TypeArguments::CheckedHandle(arguments->NativeArgAt(0)).IsNull());
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GET_NON_NULL_NATIVE_ARGUMENT(String, tag_label, arguments->NativeArgAt(1));
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return UserTag::New(tag_label);
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}
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DEFINE_NATIVE_ENTRY(UserTag_label, 1) {
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const UserTag& self = UserTag::CheckedHandle(arguments->NativeArgAt(0));
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return self.label();
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}
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DEFINE_NATIVE_ENTRY(UserTag_makeCurrent, 1) {
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const UserTag& self = UserTag::CheckedHandle(arguments->NativeArgAt(0));
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if (FLAG_trace_intrinsified_natives) {
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OS::Print("UserTag_makeCurrent: %s\n", self.ToCString());
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}
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const UserTag& old = UserTag::Handle(isolate->current_tag());
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self.MakeActive();
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return old.raw();
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}
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DEFINE_NATIVE_ENTRY(UserTag_defaultTag, 0) {
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if (FLAG_trace_intrinsified_natives) {
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OS::Print("UserTag_defaultTag\n");
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}
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return isolate->object_store()->default_tag();
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}
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DEFINE_NATIVE_ENTRY(Profiler_getCurrentTag, 0) {
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if (FLAG_trace_intrinsified_natives) {
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OS::Print("Profiler_getCurrentTag\n");
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}
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return isolate->current_tag();
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}
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} // namespace dart
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