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Diffstat (limited to 'runtime/entrypoints/jni/jni_entrypoints.cc')
-rw-r--r-- | runtime/entrypoints/jni/jni_entrypoints.cc | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/runtime/entrypoints/jni/jni_entrypoints.cc b/runtime/entrypoints/jni/jni_entrypoints.cc new file mode 100644 index 0000000..98f7b12 --- /dev/null +++ b/runtime/entrypoints/jni/jni_entrypoints.cc @@ -0,0 +1,46 @@ +/* + * Copyright (C) 2012 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "base/logging.h" +#include "mirror/abstract_method.h" +#include "scoped_thread_state_change.h" +#include "thread.h" + +namespace art { + +// Used by the JNI dlsym stub to find the native method to invoke if none is registered. +extern "C" void* artFindNativeMethod(Thread* self) { + Locks::mutator_lock_->AssertNotHeld(self); // We come here as Native. + DCHECK(Thread::Current() == self); + ScopedObjectAccess soa(self); + + mirror::AbstractMethod* method = self->GetCurrentMethod(NULL); + DCHECK(method != NULL); + + // Lookup symbol address for method, on failure we'll return NULL with an + // exception set, otherwise we return the address of the method we found. + void* native_code = soa.Vm()->FindCodeForNativeMethod(method); + if (native_code == NULL) { + DCHECK(self->IsExceptionPending()); + return NULL; + } else { + // Register so that future calls don't come here + method->RegisterNative(self, native_code); + return native_code; + } +} + +} // namespace art |