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// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#include "vm/allocation.h"
#include "platform/assert.h"
#include "vm/isolate.h"
#include "vm/thread.h"
#include "vm/zone.h"
namespace dart {
static void* Allocate(uword size, Zone* zone) {
ASSERT(zone != NULL);
if (size > static_cast<uword>(kIntptrMax)) {
FATAL1("ZoneAllocated object has unexpectedly large size %" Pu "", size);
}
return reinterpret_cast<void*>(zone->AllocUnsafe(size));
}
void* ZoneAllocated::operator new(uword size) {
return Allocate(size, Thread::Current()->zone());
}
void* ZoneAllocated::operator new(uword size, Zone* zone) {
ASSERT(Thread::Current()->ZoneIsOwnedByThread(zone));
return Allocate(size, zone);
}
StackResource::~StackResource() {
if (thread_ != NULL) {
StackResource* top = thread_->top_resource();
ASSERT(top == this);
thread_->set_top_resource(previous_);
}
#if defined(DEBUG)
if (thread_ != NULL) {
ASSERT(Thread::Current() == thread_);
BaseIsolate::AssertCurrent(reinterpret_cast<BaseIsolate*>(isolate()));
}
#endif
}
Isolate* StackResource::isolate() const {
return thread_ == NULL ? NULL : thread_->isolate();
}
void StackResource::Init(Thread* thread) {
// We can only have longjumps and exceptions when there is a current
// thread and isolate. If there is no current thread, we don't need to
// protect this case.
// TODO(23807): Eliminate this special case.
if (thread != NULL) {
ASSERT(Thread::Current() == thread);
thread_ = thread;
previous_ = thread_->top_resource();
ASSERT((previous_ == NULL) || (previous_->thread_ == thread));
thread_->set_top_resource(this);
}
}
void StackResource::UnwindAbove(Thread* thread, StackResource* new_top) {
StackResource* current_resource = thread->top_resource();
while (current_resource != new_top) {
current_resource->~StackResource();
current_resource = thread->top_resource();
}
}
#if defined(DEBUG)
NoSafepointScope::NoSafepointScope(Thread* current_thread)
: StackResource(current_thread != nullptr ? current_thread
: Thread::Current()) {
thread()->IncrementNoSafepointScopeDepth();
}
NoSafepointScope::~NoSafepointScope() {
thread()->DecrementNoSafepointScopeDepth();
}
#endif // defined(DEBUG)
} // namespace dart