blob: 7057739a92d97da76b3000974078179f7e4a1ec0 [file] [log] [blame]
// 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/handles.h"
#include "platform/assert.h"
#include "platform/utils.h"
#include "vm/dart_api_state.h"
#include "vm/flags.h"
#include "vm/isolate.h"
#include "vm/os.h"
#include "vm/raw_object.h"
#include "vm/visitor.h"
#include "vm/zone.h"
#include "vm/handles_impl.h"
namespace dart {
DEFINE_FLAG(bool, verify_handles, false, "Verify handles.");
DEFINE_DEBUG_FLAG(bool, trace_handles,
false, "Traces allocation of handles.");
VMHandles::~VMHandles() {
#ifdef DEBUG
if (FLAG_trace_handles) {
OS::PrintErr("*** Handle Counts for 0x(%" Px
"):Zone = %d,Scoped = %d\n",
reinterpret_cast<intptr_t>(this),
CountZoneHandles(), CountScopedHandles());
OS::PrintErr("*** Deleting VM handle block 0x%" Px "\n",
reinterpret_cast<intptr_t>(this));
}
#endif
}
void VMHandles::VisitObjectPointers(ObjectPointerVisitor* visitor) {
return Handles<kVMHandleSizeInWords,
kVMHandlesPerChunk,
kOffsetOfRawPtr>::VisitObjectPointers(visitor);
}
#if defined(DEBUG)
static bool IsCurrentApiNativeScope(Zone* zone) {
ApiNativeScope* scope = ApiNativeScope::Current();
return (scope != NULL) && (scope->zone() == zone);
}
#endif // DEBUG
uword VMHandles::AllocateHandle(Zone* zone) {
DEBUG_ASSERT(!IsCurrentApiNativeScope(zone));
return Handles<kVMHandleSizeInWords,
kVMHandlesPerChunk,
kOffsetOfRawPtr>::AllocateHandle(zone);
}
uword VMHandles::AllocateZoneHandle(Zone* zone) {
DEBUG_ASSERT(!IsCurrentApiNativeScope(zone));
return Handles<kVMHandleSizeInWords,
kVMHandlesPerChunk,
kOffsetOfRawPtr>::AllocateZoneHandle(zone);
}
bool VMHandles::IsZoneHandle(uword handle) {
return Handles<kVMHandleSizeInWords,
kVMHandlesPerChunk,
kOffsetOfRawPtr >::IsZoneHandle(handle);
}
int VMHandles::ScopedHandleCount() {
Thread* thread = Thread::Current();
ASSERT(thread->zone() != NULL);
VMHandles* handles = thread->zone()->handles();
return handles->CountScopedHandles();
}
int VMHandles::ZoneHandleCount() {
Thread* thread = Thread::Current();
ASSERT(thread->zone() != NULL);
VMHandles* handles = thread->zone()->handles();
return handles->CountZoneHandles();
}
void HandleScope::Initialize() {
ASSERT(thread()->no_handle_scope_depth() == 0);
VMHandles* handles = thread()->zone()->handles();
ASSERT(handles != NULL);
saved_handle_block_ = handles->scoped_blocks_;
saved_handle_slot_ = handles->scoped_blocks_->next_handle_slot();
#if defined(DEBUG)
link_ = thread()->top_handle_scope();
thread()->set_top_handle_scope(this);
#endif
}
HandleScope::HandleScope(Thread* thread) : StackResource(thread) {
Initialize();
}
HandleScope::~HandleScope() {
ASSERT(thread()->zone() != NULL);
VMHandles* handles = thread()->zone()->handles();
ASSERT(handles != NULL);
handles->scoped_blocks_ = saved_handle_block_;
handles->scoped_blocks_->set_next_handle_slot(saved_handle_slot_);
#if defined(DEBUG)
handles->VerifyScopedHandleState();
handles->ZapFreeScopedHandles();
ASSERT(thread()->top_handle_scope() == this);
thread()->set_top_handle_scope(link_);
#endif
}
#if defined(DEBUG)
NoHandleScope::NoHandleScope(Thread* thread) : StackResource(thread) {
thread->IncrementNoHandleScopeDepth();
}
NoHandleScope::~NoHandleScope() {
thread()->DecrementNoHandleScopeDepth();
}
#endif // defined(DEBUG)
} // namespace dart