asiva@google.com
3af18cc4c0
2. Add a convenience macro to make use of reusable handle scopes easier R=iposva@google.com Review URL: https://codereview.chromium.org//187503002 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@33471 260f80e4-7a28-3924-810f-c04153c831b5
68 lines
2.0 KiB
C++
68 lines
2.0 KiB
C++
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/longjump.h"
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#include "include/dart_api.h"
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#include "vm/dart_api_impl.h"
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#include "vm/isolate.h"
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#include "vm/object.h"
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#include "vm/object_store.h"
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#include "vm/os.h"
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#include "vm/simulator.h"
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namespace dart {
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jmp_buf* LongJumpScope::Set() {
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ASSERT(top_ == NULL);
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top_ = Isolate::Current()->top_resource();
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return &environment_;
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}
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bool LongJumpScope::IsSafeToJump() {
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// We do not want to jump past Dart frames. Note that this code
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// assumes the stack grows from high to low.
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Isolate* isolate = Isolate::Current();
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uword jumpbuf_addr = reinterpret_cast<uword>(this);
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#if defined(USING_SIMULATOR)
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uword top_exit_frame_info = isolate->simulator()->top_exit_frame_info();
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#else
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uword top_exit_frame_info = isolate->top_exit_frame_info();
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#endif
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return ((top_exit_frame_info == 0) || (jumpbuf_addr < top_exit_frame_info));
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}
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void LongJumpScope::Jump(int value, const Error& error) {
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// A zero is the default return value from setting up a LongJumpScope
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// using Set.
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ASSERT(value != 0);
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ASSERT(IsSafeToJump());
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Isolate* isolate = Isolate::Current();
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#if defined(DEBUG)
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#define CHECK_REUSABLE_HANDLE(name) \
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ASSERT(!isolate->reusable_##name##_handle_scope_active());
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REUSABLE_HANDLE_LIST(CHECK_REUSABLE_HANDLE)
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#undef CHECK_REUSABLE_HANDLE
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#endif // defined(DEBUG)
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// Remember the error in the sticky error of this isolate.
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isolate->object_store()->set_sticky_error(error);
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// Destruct all the active StackResource objects.
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StackResource* current_resource = isolate->top_resource();
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while (current_resource != top_) {
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current_resource->~StackResource();
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current_resource = isolate->top_resource();
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}
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longjmp(environment_, value);
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UNREACHABLE();
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}
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} // namespace dart
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