blob: 36d5031ad8741640767a33864a398e2842f7e607 [file] [log] [blame]
// Copyright (c) 2011, 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/longjump.h"
#include "include/dart_api.h"
#include "vm/dart_api_impl.h"
#include "vm/interpreter.h"
#include "vm/isolate.h"
#include "vm/object.h"
#include "vm/object_store.h"
#include "vm/os.h"
#include "vm/simulator.h"
namespace dart {
jmp_buf* LongJumpScope::Set() {
ASSERT(top_ == NULL);
top_ = Thread::Current()->top_resource();
return &environment_;
bool LongJumpScope::IsSafeToJump() {
// We do not want to jump past Dart frames. Note that this code
// assumes the stack grows from high to low.
Thread* thread = Thread::Current();
uword jumpbuf_addr = OSThread::GetCurrentStackPointer();
#error "Simultaneous usage of simulator and interpreter not yet supported."
#endif // defined(USING_SIMULATOR) && defined(DART_USE_INTERPRETER)
#if defined(USING_SIMULATOR)
Simulator* sim = Simulator::Current();
// When using simulator, only mutator thread should refer to Simulator
// since there can be only one per isolate.
uword top_exit_frame_info =
thread->IsMutatorThread() ? sim->top_exit_frame_info() : 0;
uword top_exit_frame_info = thread->top_exit_frame_info();
if (!thread->IsMutatorThread()) {
// A helper thread does not execute Dart code, so it's safe to jump.
ASSERT(top_exit_frame_info == 0);
return true;
return ((top_exit_frame_info == 0) || (jumpbuf_addr < top_exit_frame_info));
void LongJumpScope::Jump(int value, const Error& error) {
// A zero is the default return value from setting up a LongJumpScope
// using Set.
ASSERT(value != 0);
Thread* thread = Thread::Current();
#if defined(DEBUG)
#endif // defined(DEBUG)
// Remember the error in the sticky error of this isolate.
// Destruct all the active StackResource objects.
StackResource::UnwindAbove(thread, top_);
longjmp(environment_, value);
} // namespace dart