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comparison src/share/vm/prims/methodHandles.cpp @ 10276:f0bc60565ba8

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7196277: JSR 292: Two jck/runtime tests crash on java.lang.invoke.MethodHandle.invokeExact Reviewed-by: jrose, kvn
author twisti
date Mon, 06 May 2013 13:53:13 -0700
parents 746b070f5022
children e484fe2abebd
comparison
equal deleted inserted replaced
10275:d73c88e524ff 10276:f0bc60565ba8
1296 java_lang_invoke_CallSite::set_target_volatile(call_site(), target()); 1296 java_lang_invoke_CallSite::set_target_volatile(call_site(), target());
1297 } 1297 }
1298 } 1298 }
1299 JVM_END 1299 JVM_END
1300 1300
1301 /**
1302 * Throws a java/lang/UnsupportedOperationException unconditionally.
1303 * This is required by the specification of MethodHandle.invoke if
1304 * invoked directly.
1305 */
1306 JVM_ENTRY(jobject, MH_invoke_UOE(JNIEnv* env, jobject mh, jobjectArray args)) {
1307 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "MethodHandle.invoke cannot be invoked reflectively");
1308 return NULL;
1309 }
1310 JVM_END
1311
1312 /**
1313 * Throws a java/lang/UnsupportedOperationException unconditionally.
1314 * This is required by the specification of MethodHandle.invokeExact if
1315 * invoked directly.
1316 */
1317 JVM_ENTRY(jobject, MH_invokeExact_UOE(JNIEnv* env, jobject mh, jobjectArray args)) {
1318 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "MethodHandle.invokeExact cannot be invoked reflectively");
1319 return NULL;
1320 }
1321 JVM_END
1322
1301 /// JVM_RegisterMethodHandleMethods 1323 /// JVM_RegisterMethodHandleMethods
1302 1324
1303 #undef CS // Solaris builds complain 1325 #undef CS // Solaris builds complain
1304 1326
1305 #define LANG "Ljava/lang/" 1327 #define LANG "Ljava/lang/"
1315 1337
1316 #define CC (char*) /*cast a literal from (const char*)*/ 1338 #define CC (char*) /*cast a literal from (const char*)*/
1317 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) 1339 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f)
1318 1340
1319 // These are the native methods on java.lang.invoke.MethodHandleNatives. 1341 // These are the native methods on java.lang.invoke.MethodHandleNatives.
1320 static JNINativeMethod required_methods_JDK8[] = { 1342 static JNINativeMethod MHN_methods[] = {
1321 {CC"init", CC"("MEM""OBJ")V", FN_PTR(MHN_init_Mem)}, 1343 {CC"init", CC"("MEM""OBJ")V", FN_PTR(MHN_init_Mem)},
1322 {CC"expand", CC"("MEM")V", FN_PTR(MHN_expand_Mem)}, 1344 {CC"expand", CC"("MEM")V", FN_PTR(MHN_expand_Mem)},
1323 {CC"resolve", CC"("MEM""CLS")"MEM, FN_PTR(MHN_resolve_Mem)}, 1345 {CC"resolve", CC"("MEM""CLS")"MEM, FN_PTR(MHN_resolve_Mem)},
1324 {CC"getConstant", CC"(I)I", FN_PTR(MHN_getConstant)}, 1346 {CC"getConstant", CC"(I)I", FN_PTR(MHN_getConstant)},
1325 // static native int getNamedCon(int which, Object[] name) 1347 // static native int getNamedCon(int which, Object[] name)
1333 {CC"staticFieldOffset", CC"("MEM")J", FN_PTR(MHN_staticFieldOffset)}, 1355 {CC"staticFieldOffset", CC"("MEM")J", FN_PTR(MHN_staticFieldOffset)},
1334 {CC"staticFieldBase", CC"("MEM")"OBJ, FN_PTR(MHN_staticFieldBase)}, 1356 {CC"staticFieldBase", CC"("MEM")"OBJ, FN_PTR(MHN_staticFieldBase)},
1335 {CC"getMemberVMInfo", CC"("MEM")"OBJ, FN_PTR(MHN_getMemberVMInfo)} 1357 {CC"getMemberVMInfo", CC"("MEM")"OBJ, FN_PTR(MHN_getMemberVMInfo)}
1336 }; 1358 };
1337 1359
1338 // This one function is exported, used by NativeLookup. 1360 static JNINativeMethod MH_methods[] = {
1339 1361 // UnsupportedOperationException throwers
1362 {CC"invoke", CC"(["OBJ")"OBJ, FN_PTR(MH_invoke_UOE)},
1363 {CC"invokeExact", CC"(["OBJ")"OBJ, FN_PTR(MH_invokeExact_UOE)}
1364 };
1365
1366 /**
1367 * Helper method to register native methods.
1368 */
1369 static bool register_natives(JNIEnv* env, jclass clazz, const JNINativeMethod* methods, jint nMethods) {
1370 int status = env->RegisterNatives(clazz, methods, nMethods);
1371 if (status != JNI_OK || env->ExceptionOccurred()) {
1372 warning("JSR 292 method handle code is mismatched to this JVM. Disabling support.");
1373 env->ExceptionClear();
1374 return false;
1375 }
1376 return true;
1377 }
1378
1379 /**
1380 * This one function is exported, used by NativeLookup.
1381 */
1340 JVM_ENTRY(void, JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass MHN_class)) { 1382 JVM_ENTRY(void, JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass MHN_class)) {
1341 if (!EnableInvokeDynamic) { 1383 if (!EnableInvokeDynamic) {
1342 warning("JSR 292 is disabled in this JVM. Use -XX:+UnlockDiagnosticVMOptions -XX:+EnableInvokeDynamic to enable."); 1384 warning("JSR 292 is disabled in this JVM. Use -XX:+UnlockDiagnosticVMOptions -XX:+EnableInvokeDynamic to enable.");
1343 return; // bind nothing 1385 return; // bind nothing
1344 } 1386 }
1352 } else { 1394 } else {
1353 oop mirror = SystemDictionary::MethodHandle_klass()->java_mirror(); 1395 oop mirror = SystemDictionary::MethodHandle_klass()->java_mirror();
1354 MH_class = (jclass) JNIHandles::make_local(env, mirror); 1396 MH_class = (jclass) JNIHandles::make_local(env, mirror);
1355 } 1397 }
1356 1398
1357 int status;
1358
1359 if (enable_MH) { 1399 if (enable_MH) {
1360 ThreadToNativeFromVM ttnfv(thread); 1400 ThreadToNativeFromVM ttnfv(thread);
1361 1401
1362 status = env->RegisterNatives(MHN_class, required_methods_JDK8, sizeof(required_methods_JDK8)/sizeof(JNINativeMethod)); 1402 if (enable_MH) {
1363 if (status != JNI_OK || env->ExceptionOccurred()) { 1403 enable_MH = register_natives(env, MHN_class, MHN_methods, sizeof(MHN_methods)/sizeof(JNINativeMethod));
1364 warning("JSR 292 method handle code is mismatched to this JVM. Disabling support."); 1404 }
1365 enable_MH = false; 1405 if (enable_MH) {
1366 env->ExceptionClear(); 1406 enable_MH = register_natives(env, MH_class, MH_methods, sizeof(MH_methods)/sizeof(JNINativeMethod));
1367 } 1407 }
1368 } 1408 }
1369 1409
1370 if (TraceInvokeDynamic) { 1410 if (TraceInvokeDynamic) {
1371 tty->print_cr("MethodHandle support loaded (using LambdaForms)"); 1411 tty->print_cr("MethodHandle support loaded (using LambdaForms)");