40 /*

    41  * Crash protection for the watcher thread. Wrap the callback

    42  * with a sigsetjmp and in case of a SIGSEGV/SIGBUS we siglongjmp

    43  * back.

    44  * To be able to use this - don't take locks, don't rely on destructors,

    45  * don't make OS library calls, don't allocate memory, don't print,

    46  * don't call code that could leave the heap / memory in an inconsistent state,

    47  * or anything else where we are not in control if we suddenly jump out.

    48  */

    49 class WatcherThreadCrashProtection : public StackObj {

    50 public:

    51   WatcherThreadCrashProtection();

    52   bool call(os::CrashProtectionCallback& cb);

    53 

    54   static void check_crash_protection(int signal, Thread* thread);

    55 private:

    56   void restore();

    57   sigjmp_buf _jmpbuf;

    58 };