John McCutchan
bc119f28bb
- [x] Allow allocation in any zone that is owned by the current thread not just the top zone. BUG= R=fschneider@google.com Review URL: https://codereview.chromium.org/2360963005 .
90 lines
2.3 KiB
C++
90 lines
2.3 KiB
C++
// Copyright (c) 2012, 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/allocation.h"
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#include "platform/assert.h"
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#include "vm/isolate.h"
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#include "vm/thread.h"
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#include "vm/zone.h"
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namespace dart {
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static void* Allocate(uword size, Zone* zone) {
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ASSERT(zone != NULL);
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if (size > static_cast<uword>(kIntptrMax)) {
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FATAL1("ZoneAllocated object has unexpectedly large size %" Pu "", size);
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}
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return reinterpret_cast<void*>(zone->AllocUnsafe(size));
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}
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void* ZoneAllocated::operator new(uword size) {
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return Allocate(size, Thread::Current()->zone());
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}
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void* ZoneAllocated::operator new(uword size, Zone* zone) {
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ASSERT(Thread::Current()->ZoneIsOwnedByThread(zone));
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return Allocate(size, zone);
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}
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StackResource::~StackResource() {
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if (thread_ != NULL) {
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StackResource* top = thread_->top_resource();
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ASSERT(top == this);
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thread_->set_top_resource(previous_);
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}
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#if defined(DEBUG)
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if (thread_ != NULL) {
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ASSERT(Thread::Current() == thread_);
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BaseIsolate::AssertCurrent(reinterpret_cast<BaseIsolate*>(isolate()));
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}
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#endif
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}
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Isolate* StackResource::isolate() const {
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return thread_ == NULL ? NULL : thread_->isolate();
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}
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void StackResource::Init(Thread* thread) {
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// We can only have longjumps and exceptions when there is a current
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// thread and isolate. If there is no current thread, we don't need to
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// protect this case.
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// TODO(23807): Eliminate this special case.
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if (thread != NULL) {
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ASSERT(Thread::Current() == thread);
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thread_ = thread;
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previous_ = thread_->top_resource();
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ASSERT((previous_ == NULL) || (previous_->thread_ == thread));
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thread_->set_top_resource(this);
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}
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}
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void StackResource::UnwindAbove(Thread* thread, StackResource* new_top) {
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StackResource* current_resource = thread->top_resource();
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while (current_resource != new_top) {
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current_resource->~StackResource();
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current_resource = thread->top_resource();
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}
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}
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#if defined(DEBUG)
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NoSafepointScope::NoSafepointScope() : StackResource(Thread::Current()) {
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thread()->IncrementNoSafepointScopeDepth();
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}
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NoSafepointScope::~NoSafepointScope() {
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thread()->DecrementNoSafepointScopeDepth();
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}
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#endif // defined(DEBUG)
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} // namespace dart
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