mirror of
https://github.com/dart-lang/sdk
synced 2024-10-14 23:28:09 +00:00
f9a6a5bdd2
TEST=build Change-Id: I2834ef7cf7cb7c8770f8167a2438cbedcee5c623 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/292063 Commit-Queue: Ryan Macnak <rmacnak@google.com> Reviewed-by: Alexander Aprelev <aam@google.com>
111 lines
3.3 KiB
C++
111 lines
3.3 KiB
C++
// 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/os.h"
|
|
#include "vm/raw_object.h"
|
|
#include "vm/visitor.h"
|
|
#include "vm/zone.h"
|
|
|
|
#include "vm/handles_impl.h"
|
|
|
|
namespace dart {
|
|
|
|
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 != nullptr) && (scope->zone() == zone);
|
|
}
|
|
#endif // DEBUG
|
|
|
|
uword VMHandles::AllocateHandle(Zone* zone) {
|
|
DEBUG_ASSERT(!IsCurrentApiNativeScope(zone));
|
|
uword handle = Handles<kVMHandleSizeInWords, kVMHandlesPerChunk,
|
|
kOffsetOfRawPtr>::AllocateHandle(zone);
|
|
#if defined(DEBUG)
|
|
*reinterpret_cast<uword*>(handle + kOffsetOfIsZoneHandle * kWordSize) = 0;
|
|
#endif
|
|
return handle;
|
|
}
|
|
|
|
uword VMHandles::AllocateZoneHandle(Zone* zone) {
|
|
DEBUG_ASSERT(!IsCurrentApiNativeScope(zone));
|
|
uword handle = Handles<kVMHandleSizeInWords, kVMHandlesPerChunk,
|
|
kOffsetOfRawPtr>::AllocateZoneHandle(zone);
|
|
#if defined(DEBUG)
|
|
*reinterpret_cast<uword*>(handle + kOffsetOfIsZoneHandle * kWordSize) = 1;
|
|
#endif
|
|
return handle;
|
|
}
|
|
|
|
#if defined(DEBUG)
|
|
bool VMHandles::IsZoneHandle(uword handle) {
|
|
return *reinterpret_cast<uword*>(handle +
|
|
kOffsetOfIsZoneHandle * kWordSize) != 0;
|
|
}
|
|
#endif
|
|
|
|
int VMHandles::ScopedHandleCount() {
|
|
Thread* thread = Thread::Current();
|
|
ASSERT(thread->zone() != nullptr);
|
|
VMHandles* handles = thread->zone()->handles();
|
|
return handles->CountScopedHandles();
|
|
}
|
|
|
|
int VMHandles::ZoneHandleCount() {
|
|
Thread* thread = Thread::Current();
|
|
ASSERT(thread->zone() != nullptr);
|
|
VMHandles* handles = thread->zone()->handles();
|
|
return handles->CountZoneHandles();
|
|
}
|
|
|
|
void HandleScope::Initialize() {
|
|
ASSERT(thread()->MayAllocateHandles());
|
|
VMHandles* handles = thread()->zone()->handles();
|
|
ASSERT(handles != nullptr);
|
|
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(ThreadState* thread) : StackResource(thread) {
|
|
Initialize();
|
|
}
|
|
|
|
HandleScope::~HandleScope() {
|
|
ASSERT(thread()->zone() != nullptr);
|
|
VMHandles* handles = thread()->zone()->handles();
|
|
ASSERT(handles != nullptr);
|
|
#if defined(DEBUG)
|
|
VMHandles::HandlesBlock* last = handles->scoped_blocks_;
|
|
#endif
|
|
handles->scoped_blocks_ = saved_handle_block_;
|
|
handles->scoped_blocks_->set_next_handle_slot(saved_handle_slot_);
|
|
#if defined(DEBUG)
|
|
VMHandles::HandlesBlock* block = handles->scoped_blocks_;
|
|
for (;;) {
|
|
block->ZapFreeHandles();
|
|
if (block == last) break;
|
|
block = block->next_block();
|
|
}
|
|
ASSERT(thread()->top_handle_scope() == this);
|
|
thread()->set_top_handle_scope(link_);
|
|
#endif
|
|
}
|
|
|
|
} // namespace dart
|