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1 /*

3 *

4 * Redistribution and use in source and binary forms, with or without

5 * modification, are permitted provided that the following conditions

6 * are met:

7 * 1. Redistributions of source code must retain the above copyright

8 * notice, this list of conditions and the following disclaimer.

9 * 2. Redistributions in binary form must reproduce the above copyright

10 * notice, this list of conditions and the following disclaimer in the

11 * documentation and/or other materials provided with the distribution.

12 *

13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY

14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR

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18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

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21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

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23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

24 */

26 #ifndef StructureStubClearingWatchpoint_h

27 #define StructureStubClearingWatchpoint_h

29 #include "Watchpoint.h"

31 #if ENABLE(JIT)

33 #include <wtf/FastMalloc.h>

34 #include <wtf/Noncopyable.h>

35 #include <wtf/RefCounted.h>

36 #include <wtf/RefPtr.h>

38 namespace JSC {

40 class CodeBlock;

41 class WatchpointsOnStructureStubInfo;

42 struct StructureStubInfo;

44 class StructureStubClearingWatchpoint : public Watchpoint {

45 WTF_MAKE_NONCOPYABLE(StructureStubClearingWatchpoint);

46 WTF_MAKE_FAST_ALLOCATED;

47 public:

48 StructureStubClearingWatchpoint(

49 WatchpointsOnStructureStubInfo& holder)

50 : m_holder(holder)

51 {

52 }

54 StructureStubClearingWatchpoint(

55 WatchpointsOnStructureStubInfo& holder,

         std::unique_ptr<StructureStubClearingWatchpoint> next)

57 : m_holder(holder)

         , m_next(WTF::move(next))

59 {

60 }

62 virtual ~StructureStubClearingWatchpoint();

64 static StructureStubClearingWatchpoint* push(

65 WatchpointsOnStructureStubInfo& holder,

         std::unique_ptr<StructureStubClearingWatchpoint>& head);

68 protected:

     virtual void fireInternal(const FireDetail&) override;

71 private:

72 WatchpointsOnStructureStubInfo& m_holder;

     std::unique_ptr<StructureStubClearingWatchpoint> m_next;

74 };

 class WatchpointsOnStructureStubInfo : public RefCounted<WatchpointsOnStructureStubInfo> {

77 public:

     WatchpointsOnStructureStubInfo(CodeBlock* codeBlock, StructureStubInfo* stubInfo)

79 : m_codeBlock(codeBlock)

80 , m_stubInfo(stubInfo)

81 {

82 }

84 ~WatchpointsOnStructureStubInfo();

86 StructureStubClearingWatchpoint* addWatchpoint();

88 static StructureStubClearingWatchpoint* ensureReferenceAndAddWatchpoint(

89 RefPtr<WatchpointsOnStructureStubInfo>& holderRef,

90 CodeBlock*, StructureStubInfo*);

     CodeBlock* codeBlock() const { return m_codeBlock; }

     StructureStubInfo* stubInfo() const { return m_stubInfo; }

95 private:

96 CodeBlock* m_codeBlock;

97 StructureStubInfo* m_stubInfo;

     std::unique_ptr<StructureStubClearingWatchpoint> m_head;

99 };

100

101 } // namespace JSC

102

103 #endif // ENABLE(JIT)

104

105 #endif // StructureStubClearingWatchpoint_h

106