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comparison src/share/vm/prims/methodHandles.cpp @ 726:be93aad57795

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6655646: dynamic languages need dynamically linked call sites Summary: invokedynamic instruction (JSR 292 RI) Reviewed-by: twisti, never
author jrose
date Tue, 21 Apr 2009 23:21:04 -0700
parents e5b0439ef4ae
children 987e948ebbc8
comparison
equal deleted inserted replaced
725:928912ce8438 726:be93aad57795
2277 return res; 2277 return res;
2278 } 2278 }
2279 JVM_END 2279 JVM_END
2280 2280
2281 2281
2282 JVM_ENTRY(void, MH_linkCallSite(JNIEnv *env, jobject igcls, jobject site_jh, jobject target_jh)) {
2283 // No special action required, yet.
2284 oop site_oop = JNIHandles::resolve(site_jh);
2285 if (site_oop == NULL || site_oop->klass() != SystemDictionary::CallSiteImpl_klass())
2286 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "call site");
2287 sun_dyn_CallSiteImpl::set_target(site_oop, JNIHandles::resolve(target_jh));
2288 }
2289 JVM_END
2290
2291
2282 /// JVM_RegisterMethodHandleMethods 2292 /// JVM_RegisterMethodHandleMethods
2283 2293
2284 #define ADR "J" 2294 #define ADR "J"
2285 2295
2286 #define LANG "Ljava/lang/" 2296 #define LANG "Ljava/lang/"
2295 #define MHI IDYN"MethodHandleImpl;" 2305 #define MHI IDYN"MethodHandleImpl;"
2296 #define MEM IDYN"MemberName;" 2306 #define MEM IDYN"MemberName;"
2297 #define AMH IDYN"AdapterMethodHandle;" 2307 #define AMH IDYN"AdapterMethodHandle;"
2298 #define BMH IDYN"BoundMethodHandle;" 2308 #define BMH IDYN"BoundMethodHandle;"
2299 #define DMH IDYN"DirectMethodHandle;" 2309 #define DMH IDYN"DirectMethodHandle;"
2310 #define CSTI IDYN"CallSiteImpl;"
2300 2311
2301 #define CC (char*) /*cast a literal from (const char*)*/ 2312 #define CC (char*) /*cast a literal from (const char*)*/
2302 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) 2313 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f)
2303 2314
2304 // These are the native methods on sun.dyn.MethodHandleNatives. 2315 // These are the native methods on sun.dyn.MethodHandleNatives.
2318 // static native int getMembers(Class<?> defc, String matchName, String matchSig, 2329 // static native int getMembers(Class<?> defc, String matchName, String matchSig,
2319 // int matchFlags, Class<?> caller, int skip, MemberName[] results); 2330 // int matchFlags, Class<?> caller, int skip, MemberName[] results);
2320 {CC"getMembers", CC"("CLS""STRG""STRG"I"CLS"I["MEM")I", FN_PTR(MHI_getMembers)} 2331 {CC"getMembers", CC"("CLS""STRG""STRG"I"CLS"I["MEM")I", FN_PTR(MHI_getMembers)}
2321 }; 2332 };
2322 2333
2334 // More entry points specifically for EnableInvokeDynamic.
2335 static JNINativeMethod methods2[] = {
2336 {CC"linkCallSite", CC"("CSTI MH")V", FN_PTR(MH_linkCallSite)}
2337 };
2338
2323 2339
2324 // This one function is exported, used by NativeLookup. 2340 // This one function is exported, used by NativeLookup.
2325 2341
2326 JVM_ENTRY(void, JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass MHN_class)) { 2342 JVM_ENTRY(void, JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass MHN_class)) {
2327 assert(MethodHandles::spot_check_entry_names(), "entry enum is OK"); 2343 assert(MethodHandles::spot_check_entry_names(), "entry enum is OK");
2344
2345 // note: this explicit warning-producing stuff will be replaced by auto-detection of the JSR 292 classes
2328 2346
2329 if (!EnableMethodHandles) { 2347 if (!EnableMethodHandles) {
2330 warning("JSR 292 method handles are disabled in this JVM. Use -XX:+EnableMethodHandles to enable."); 2348 warning("JSR 292 method handles are disabled in this JVM. Use -XX:+EnableMethodHandles to enable.");
2331 return; // bind nothing 2349 return; // bind nothing
2332 } 2350 }
2341 env->ExceptionClear(); 2359 env->ExceptionClear();
2342 } else { 2360 } else {
2343 MethodHandles::set_enabled(true); 2361 MethodHandles::set_enabled(true);
2344 } 2362 }
2345 } 2363 }
2364
2365 if (!EnableInvokeDynamic) {
2366 warning("JSR 292 invokedynamic is disabled in this JVM. Use -XX:+EnableInvokeDynamic to enable.");
2367 return; // bind nothing
2368 }
2369
2370 {
2371 ThreadToNativeFromVM ttnfv(thread);
2372
2373 int status = env->RegisterNatives(MHN_class, methods2, sizeof(methods2)/sizeof(JNINativeMethod));
2374 if (env->ExceptionOccurred()) {
2375 MethodHandles::set_enabled(false);
2376 warning("JSR 292 method handle code is mismatched to this JVM. Disabling support.");
2377 env->ExceptionClear();
2378 } else {
2379 MethodHandles::set_enabled(true);
2380 }
2381 }
2346 } 2382 }
2347 JVM_END 2383 JVM_END