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comparison src/os/linux/vm/os_linux.cpp @ 17845:21dd1c827123

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8033696: "assert(thread != NULL) failed: just checking" due to Thread::current() and JNI pthread interaction Reviewed-by: dholmes, dsamersoff Contributed-by: andreas.eriksson@oracle.com
author kevinw
date Wed, 02 Apr 2014 18:40:52 +0200
parents 56e7f5560e60
children 6048424d3865
comparison
equal deleted inserted replaced
17843:81d7a4b28dc5 17845:21dd1c827123
1072 } 1072 }
1073 1073
1074 ////////////////////////////////////////////////////////////////////////////// 1074 //////////////////////////////////////////////////////////////////////////////
1075 // thread local storage 1075 // thread local storage
1076 1076
1077 // Restore the thread pointer if the destructor is called. This is in case
1078 // someone from JNI code sets up a destructor with pthread_key_create to run
1079 // detachCurrentThread on thread death. Unless we restore the thread pointer we
1080 // will hang or crash. When detachCurrentThread is called the key will be set
1081 // to null and we will not be called again. If detachCurrentThread is never
1082 // called we could loop forever depending on the pthread implementation.
1083 static void restore_thread_pointer(void* p) {
1084 Thread* thread = (Thread*) p;
1085 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread);
1086 }
1087
1077 int os::allocate_thread_local_storage() { 1088 int os::allocate_thread_local_storage() {
1078 pthread_key_t key; 1089 pthread_key_t key;
1079 int rslt = pthread_key_create(&key, NULL); 1090 int rslt = pthread_key_create(&key, restore_thread_pointer);
1080 assert(rslt == 0, "cannot allocate thread local storage"); 1091 assert(rslt == 0, "cannot allocate thread local storage");
1081 return (int)key; 1092 return (int)key;
1082 } 1093 }
1083 1094
1084 // Note: This is currently not used by VM, as we don't destroy TLS key 1095 // Note: This is currently not used by VM, as we don't destroy TLS key