7087357: JSR 292: remove obsolete code after 7085860

Reviewed-by: kvn, never

src/share/vm/classfile/javaClasses.cpp

@@ -2738,17 +2738,6 @@ void java_lang_invoke_CallSite::compute_offsets() {
   if (k != NULL) {
     compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
   }
-
-  // Disallow compilation of CallSite.setTargetNormal and CallSite.setTargetVolatile
-  // (For C2:  keep this until we have throttling logic for uncommon traps.)
-  if (k != NULL) {
-    instanceKlass* ik = instanceKlass::cast(k);
-    methodOop m_normal   = ik->lookup_method(vmSymbols::setTargetNormal_name(),   vmSymbols::setTarget_signature());
-    methodOop m_volatile = ik->lookup_method(vmSymbols::setTargetVolatile_name(), vmSymbols::setTarget_signature());
-    guarantee(m_normal != NULL && m_volatile != NULL, "must exist");
-    m_normal->set_not_compilable_quietly();
-    m_volatile->set_not_compilable_quietly();
-  }
 }
 
 

src/share/vm/interpreter/interpreterRuntime.cpp

@@ -547,23 +547,6 @@ IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecode
     }
   }
 
-  if (is_put && !is_static && klass->is_subclass_of(SystemDictionary::CallSite_klass()) && (info.name() == vmSymbols::target_name())) {
-    const jint direction = frame::interpreter_frame_expression_stack_direction();
-    Handle call_site    (THREAD, *((oop*) thread->last_frame().interpreter_frame_tos_at(-1 * direction)));
-    Handle method_handle(THREAD, *((oop*) thread->last_frame().interpreter_frame_tos_at( 0 * direction)));
-    assert(call_site    ->is_a(SystemDictionary::CallSite_klass()),     "must be");
-    assert(method_handle->is_a(SystemDictionary::MethodHandle_klass()), "must be");
-
-    {
-      // Walk all nmethods depending on this call site.
-      MutexLocker mu(Compile_lock, thread);
-      Universe::flush_dependents_on(call_site, method_handle);
-    }
-
-    // Don't allow fast path for setting CallSite.target and sub-classes.
-    put_code = (Bytecodes::Code) 0;
-  }
-
   cache_entry(thread)->set_field(
     get_code,
     put_code,

src/share/vm/prims/methodHandles.cpp

@@ -3180,17 +3180,15 @@ JVM_ENTRY(void, JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass MHN_class))
       jclass MH_class = env->FindClass(MH_name);
       status = env->RegisterNatives(MH_class, invoke_methods, sizeof(invoke_methods)/sizeof(JNINativeMethod));
     }
+    if (!env->ExceptionOccurred()) {
+      status = env->RegisterNatives(MHN_class, call_site_methods, sizeof(call_site_methods)/sizeof(JNINativeMethod));
+    }
     if (env->ExceptionOccurred()) {
       warning("JSR 292 method handle code is mismatched to this JVM.  Disabling support.");
       enable_MH = false;
       env->ExceptionClear();
     }
 
-    status = env->RegisterNatives(MHN_class, call_site_methods, sizeof(call_site_methods)/sizeof(JNINativeMethod));
-    if (env->ExceptionOccurred()) {
-      // Exception is okay until 7087357
-      env->ExceptionClear();
-    }
   }
 
   if (enable_MH) {

src/share/vm/prims/unsafe.cpp

@@ -178,17 +178,6 @@ jint Unsafe_invocation_key_to_method_slot(jint key) {
     v = *(oop*)index_oop_from_field_offset_long(p, offset);                 \
   }
 
-#define GET_OOP_FIELD_VOLATILE(obj, offset, v) \
-  oop p = JNIHandles::resolve(obj);   \
-  volatile oop v;                     \
-  if (UseCompressedOops) {            \
-    volatile narrowOop n = *(volatile narrowOop*)index_oop_from_field_offset_long(p, offset); \
-    v = oopDesc::decode_heap_oop(n);                               \
-  } else {                            \
-    v = *(volatile oop*)index_oop_from_field_offset_long(p, offset);       \
-  } \
-  OrderAccess::acquire();
-
 
 // Get/SetObject must be special-cased, since it works with handles.
 
@@ -296,28 +285,21 @@ UNSAFE_END
 
 UNSAFE_ENTRY(jobject, Unsafe_GetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset))
   UnsafeWrapper("Unsafe_GetObjectVolatile");
-  GET_OOP_FIELD_VOLATILE(obj, offset, v)
+  oop p = JNIHandles::resolve(obj);
+  void* addr = index_oop_from_field_offset_long(p, offset);
+  volatile oop v;
+  if (UseCompressedOops) {
+    volatile narrowOop n = *(volatile narrowOop*) addr;
+    v = oopDesc::decode_heap_oop(n);
+  } else {
+    v = *(volatile oop*) addr;
+  }
+  OrderAccess::acquire();
   return JNIHandles::make_local(env, v);
 UNSAFE_END
 
 UNSAFE_ENTRY(void, Unsafe_SetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h))
   UnsafeWrapper("Unsafe_SetObjectVolatile");
-  {
-    // Catch VolatileCallSite.target stores (via
-    // CallSite.setTargetVolatile) and check call site dependencies.
-    oop p = JNIHandles::resolve(obj);
-    if ((offset == java_lang_invoke_CallSite::target_offset_in_bytes()) && p->is_a(SystemDictionary::CallSite_klass())) {
-      Handle call_site    (THREAD, p);
-      Handle method_handle(THREAD, JNIHandles::resolve(x_h));
-      assert(call_site    ->is_a(SystemDictionary::CallSite_klass()),     "must be");
-      assert(method_handle->is_a(SystemDictionary::MethodHandle_klass()), "must be");
-      {
-        // Walk all nmethods depending on this call site.
-        MutexLocker mu(Compile_lock, thread);
-        Universe::flush_dependents_on(call_site(), method_handle());
-      }
-    }
-  }
   oop x = JNIHandles::resolve(x_h);
   oop p = JNIHandles::resolve(obj);
   void* addr = index_oop_from_field_offset_long(p, offset);