graal-jvmci-8: src/os/windows/vm/os

8020701: Avoid crashes in WatcherThread Reviewed-by: acorn, dcubed, dsimms

comparison

equal deleted inserted replaced

-:c29568b733d2
+:5e3b6f79d280
 jio_fprintf(stderr,
 "Could not open pause file '%s', continuing immediately.\n", filename);
 }
 }
+os::WatcherThreadCrashProtection::WatcherThreadCrashProtection() {
+assert(Thread::current()->is_Watcher_thread(), "Must be WatcherThread");
+}
+/*
+* See the caveats for this class in os_windows.hpp
+* Protects the callback call so that raised OS EXCEPTIONS causes a jump back
+* into this method and returns false. If no OS EXCEPTION was raised, returns
+* true.
+* The callback is supposed to provide the method that should be protected.
+*/
+bool os::WatcherThreadCrashProtection::call(os::CrashProtectionCallback& cb) {
+assert(Thread::current()->is_Watcher_thread(), "Only for WatcherThread");
+assert(!WatcherThread::watcher_thread()->has_crash_protection(),
+"crash_protection already set?");
+bool success = true;
+__try {
+WatcherThread::watcher_thread()->set_crash_protection(this);
+cb.call();
+} __except(EXCEPTION_EXECUTE_HANDLER) {
+// only for protection, nothing to do
+success = false;
+}
+WatcherThread::watcher_thread()->set_crash_protection(NULL);
+return success;
+}
 // An Event wraps a win32 "CreateEvent" kernel handle.
 //
 // We have a number of choices regarding "CreateEvent" win32 handle leakage:
 //
 // 1:  When a thread dies return the Event to the EventFreeList, clear the ParkHandle

Mercurial > hg > graal-jvmci-8