blob: 66f87e62834902b77b50710b7bb1780a75f6a91a [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/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);
}
uword VMHandles::AllocateHandle(Isolate* isolate) {
return Handles<kVMHandleSizeInWords,
kVMHandlesPerChunk,
kOffsetOfRawPtr>::AllocateHandle(isolate);
}
uword VMHandles::AllocateZoneHandle(Isolate* isolate) {
return Handles<kVMHandleSizeInWords,
kVMHandlesPerChunk,
kOffsetOfRawPtr>::AllocateZoneHandle(isolate);
}
bool VMHandles::IsZoneHandle(uword handle) {
return Handles<kVMHandleSizeInWords,
kVMHandlesPerChunk,
kOffsetOfRawPtr >::IsZoneHandle(handle);
}
int VMHandles::ScopedHandleCount() {
Isolate* isolate = Isolate::Current();
ASSERT(isolate->current_zone() != NULL);
VMHandles* handles = isolate->current_zone()->handles();
return handles->CountScopedHandles();
}
int VMHandles::ZoneHandleCount() {
Isolate* isolate = Isolate::Current();
ASSERT(isolate->current_zone() != NULL);
VMHandles* handles = isolate->current_zone()->handles();
return handles->CountZoneHandles();
}
HandleScope::HandleScope(BaseIsolate* isolate) : StackResource(isolate) {
ASSERT(isolate->no_handle_scope_depth() == 0);
VMHandles* handles = isolate->current_zone()->handles();
ASSERT(handles != NULL);
saved_handle_block_ = handles->scoped_blocks_;
saved_handle_slot_ = handles->scoped_blocks_->next_handle_slot();
#if defined(DEBUG)
link_ = isolate->top_handle_scope();
isolate->set_top_handle_scope(this);
#endif
}
HandleScope::~HandleScope() {
ASSERT(isolate()->current_zone() != NULL);
VMHandles* handles = isolate()->current_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(isolate()->top_handle_scope() == this);
isolate()->set_top_handle_scope(link_);
#endif
}
#if defined(DEBUG)
NoHandleScope::NoHandleScope(BaseIsolate* isolate) : StackResource(isolate) {
isolate->IncrementNoHandleScopeDepth();
}
NoHandleScope::NoHandleScope() : StackResource(Isolate::Current()) {
isolate()->IncrementNoHandleScopeDepth();
}
NoHandleScope::~NoHandleScope() {
isolate()->DecrementNoHandleScopeDepth();
}
#endif // defined(DEBUG)
} // namespace dart