zra@google.com
fdeff1ba17
LongJump required explicitly restoring the old long jump base before function return. This was sometimes forgotten, leading to crashes. This change puts the base restoration into the destructor so that it happens automatically on return. R=iposva@google.com Review URL: https://codereview.chromium.org//108383007 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@31463 260f80e4-7a28-3924-810f-c04153c831b5
49 lines
1.0 KiB
C++
49 lines
1.0 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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#ifndef VM_LONGJUMP_H_
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#define VM_LONGJUMP_H_
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#include <setjmp.h>
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#include "vm/allocation.h"
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#include "vm/isolate.h"
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namespace dart {
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class Error;
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class LongJumpScope : public StackResource {
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public:
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LongJumpScope()
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: StackResource(Isolate::Current()),
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top_(NULL),
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base_(Isolate::Current()->long_jump_base()) {
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Isolate::Current()->set_long_jump_base(this);
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}
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~LongJumpScope() {
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Isolate::Current()->set_long_jump_base(base_);
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}
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jmp_buf* Set();
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void Jump(int value, const Error& error);
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// Would it be safe to use this longjump?
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//
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// Checks to make sure that the jump would not cross Dart frames.
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bool IsSafeToJump();
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private:
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jmp_buf environment_;
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StackResource* top_;
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LongJumpScope* base_;
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DISALLOW_COPY_AND_ASSIGN(LongJumpScope);
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};
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} // namespace dart
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#endif // VM_LONGJUMP_H_
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