src/os/windows/vm/os_windows.hpp

rev 8957 : 8223147: JFR Backport
8199712: Flight Recorder
8203346: JFR: Inconsistent signature of jfr_add_string_constant
8195817: JFR.stop should require name of recording
8195818: JFR.start should increase autogenerated name by one
8195819: Remove recording=x from jcmd JFR.check output
8203921: JFR thread sampling is missing fixes from JDK-8194552
8203929: Limit amount of data for JFR.dump
8203664: JFR start failure after AppCDS archive created with JFR StartFlightRecording
8003209: JFR events for network utilization
8207392: [PPC64] Implement JFR profiling

@@ -109,10 +109,32 @@
  * To be able to use this - don't take locks, don't rely on destructors,
  * don't make OS library calls, don't allocate memory, don't print,
  * don't call code that could leave the heap / memory in an inconsistent state,
  * or anything else where we are not in control if we suddenly jump out.
  */
+class ThreadCrashProtection : public StackObj {
+public:
+  static bool is_crash_protected(Thread* thr) {
+    return _crash_protection != NULL && _protected_thread == thr;
+  }
+
+  ThreadCrashProtection();
+  bool call(os::CrashProtectionCallback& cb);
+private:
+  static Thread* _protected_thread;
+  static ThreadCrashProtection* _crash_protection;
+  static volatile intptr_t _crash_mux;
+};
+
+/*
+ * Crash protection for the watcher thread. Wrap the callback
+ * with a __try { call() }
+ * To be able to use this - don't take locks, don't rely on destructors,
+ * don't make OS library calls, don't allocate memory, don't print,
+ * don't call code that could leave the heap / memory in an inconsistent state,
+ * or anything else where we are not in control if we suddenly jump out.
+ */
 class WatcherThreadCrashProtection : public StackObj {
 public:
   WatcherThreadCrashProtection();
   bool call(os::CrashProtectionCallback& cb);
 };