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comparison src/share/vm/prims/jvmtiEnvBase.cpp @ 612:afa80fa86d22

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Merge
author dcubed
date Mon, 02 Mar 2009 14:43:36 -0700
parents 2f716c0acb64
children b109e761e927
comparison
equal deleted inserted replaced
593:1b68c738c0d9 612:afa80fa86d22
89 } 89 }
90 90
91 if (_globally_initialized == false) { 91 if (_globally_initialized == false) {
92 globally_initialize(); 92 globally_initialize();
93 } 93 }
94 }
95
96
97 bool
98 JvmtiEnvBase::is_valid() {
99 jint value = 0;
100
101 // This object might not be a JvmtiEnvBase so we can't assume
102 // the _magic field is properly aligned. Get the value in a safe
103 // way and then check against JVMTI_MAGIC.
104
105 switch (sizeof(_magic)) {
106 case 2:
107 value = Bytes::get_native_u2((address)&_magic);
108 break;
109
110 case 4:
111 value = Bytes::get_native_u4((address)&_magic);
112 break;
113
114 case 8:
115 value = Bytes::get_native_u8((address)&_magic);
116 break;
117
118 default:
119 guarantee(false, "_magic field is an unexpected size");
120 }
121
122 return value == JVMTI_MAGIC;
94 } 123 }
95 124
96 125
97 JvmtiEnvBase::JvmtiEnvBase() : _env_event_enable() { 126 JvmtiEnvBase::JvmtiEnvBase() : _env_event_enable() {
98 _env_local_storage = NULL; 127 _env_local_storage = NULL;
1320 JvmtiEnvBase::force_early_return(JavaThread* java_thread, jvalue value, TosState tos) { 1349 JvmtiEnvBase::force_early_return(JavaThread* java_thread, jvalue value, TosState tos) {
1321 JavaThread* current_thread = JavaThread::current(); 1350 JavaThread* current_thread = JavaThread::current();
1322 HandleMark hm(current_thread); 1351 HandleMark hm(current_thread);
1323 uint32_t debug_bits = 0; 1352 uint32_t debug_bits = 0;
1324 1353
1354 // retrieve or create the state
1355 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1356 if (state == NULL) {
1357 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1358 }
1359
1325 // Check if java_thread is fully suspended 1360 // Check if java_thread is fully suspended
1326 if (!is_thread_fully_suspended(java_thread, 1361 if (!is_thread_fully_suspended(java_thread,
1327 true /* wait for suspend completion */, 1362 true /* wait for suspend completion */,
1328 &debug_bits)) { 1363 &debug_bits)) {
1329 return JVMTI_ERROR_THREAD_NOT_SUSPENDED; 1364 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1330 } 1365 }
1331
1332 // retreive or create the state
1333 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1334 1366
1335 // Check to see if a ForceEarlyReturn was already in progress 1367 // Check to see if a ForceEarlyReturn was already in progress
1336 if (state->is_earlyret_pending()) { 1368 if (state->is_earlyret_pending()) {
1337 // Probably possible for JVMTI clients to trigger this, but the 1369 // Probably possible for JVMTI clients to trigger this, but the
1338 // JPDA backend shouldn't allow this to happen 1370 // JPDA backend shouldn't allow this to happen