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150 lines
5.0 KiB
150 lines
5.0 KiB
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_RUNTIME_JNI_JNI_INTERNAL_H_
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#define ART_RUNTIME_JNI_JNI_INTERNAL_H_
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#include <jni.h>
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#include <iosfwd>
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#include "base/locks.h"
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#include "base/macros.h"
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#include "reflective_handle.h"
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#include "reflective_handle_scope.h"
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#include "runtime.h"
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#include "thread.h"
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namespace art {
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class ArtField;
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class ArtMethod;
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class ScopedObjectAccess;
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const JNINativeInterface* GetJniNativeInterface();
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const JNINativeInterface* GetRuntimeShutdownNativeInterface();
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int ThrowNewException(JNIEnv* env, jclass exception_class, const char* msg, jobject cause);
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// Enables native stack checking for field and method resolutions via JNI. This should be called
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// during runtime initialization after libjavacore and libopenjdk have been dlopen()'ed.
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void JniInitializeNativeCallerCheck();
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// Removes native stack checking state.
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void JniShutdownNativeCallerCheck();
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// Finds the method using JNI semantics and initializes any classes. Does not encode the method in a
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// JNI id
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ArtMethod* FindMethodJNI(const ScopedObjectAccess& soa,
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jclass java_class,
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const char* name,
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const char* sig,
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bool is_static) REQUIRES_SHARED(Locks::mutator_lock_);
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// Finds the field using JNI semantics and initializes any classes. Does not encode the method in a
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// JNI id.
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ArtField* FindFieldJNI(const ScopedObjectAccess& soa,
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jclass java_class,
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const char* name,
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const char* sig,
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bool is_static) REQUIRES_SHARED(Locks::mutator_lock_);
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namespace jni {
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// We want to maintain a branchless fast-path for performance reasons. The JniIdManager is the
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// ultimate source of truth for how the IDs are handed out but we inline the normal non-index cases
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// here.
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template <bool kEnableIndexIds>
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ALWAYS_INLINE
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static bool IsIndexId(jmethodID mid) {
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return kEnableIndexIds && ((reinterpret_cast<uintptr_t>(mid) % 2) != 0);
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}
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template <bool kEnableIndexIds>
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ALWAYS_INLINE
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static bool IsIndexId(jfieldID fid) {
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return kEnableIndexIds && ((reinterpret_cast<uintptr_t>(fid) % 2) != 0);
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}
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template <bool kEnableIndexIds = true>
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ALWAYS_INLINE
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static inline ArtField* DecodeArtField(jfieldID fid) {
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if (IsIndexId<kEnableIndexIds>(fid)) {
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return Runtime::Current()->GetJniIdManager()->DecodeFieldId(fid);
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} else {
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return reinterpret_cast<ArtField*>(fid);
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}
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}
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template <bool kEnableIndexIds = true>
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ALWAYS_INLINE static inline jfieldID EncodeArtField(ReflectiveHandle<ArtField> field)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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if (kEnableIndexIds && Runtime::Current()->GetJniIdType() != JniIdType::kPointer) {
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return Runtime::Current()->GetJniIdManager()->EncodeFieldId(field);
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} else {
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return reinterpret_cast<jfieldID>(field.Get());
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}
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}
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template <bool kEnableIndexIds = true>
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ALWAYS_INLINE
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static inline jfieldID EncodeArtField(ArtField* field) REQUIRES_SHARED(Locks::mutator_lock_) {
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if (kEnableIndexIds && Runtime::Current()->GetJniIdType() != JniIdType::kPointer) {
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return Runtime::Current()->GetJniIdManager()->EncodeFieldId(field);
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} else {
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return reinterpret_cast<jfieldID>(field);
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}
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}
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template <bool kEnableIndexIds = true>
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ALWAYS_INLINE
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static inline jmethodID EncodeArtMethod(ReflectiveHandle<ArtMethod> art_method)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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if (kEnableIndexIds && Runtime::Current()->GetJniIdType() != JniIdType::kPointer) {
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return Runtime::Current()->GetJniIdManager()->EncodeMethodId(art_method);
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} else {
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return reinterpret_cast<jmethodID>(art_method.Get());
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}
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}
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template <bool kEnableIndexIds = true>
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ALWAYS_INLINE
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static inline jmethodID EncodeArtMethod(ArtMethod* art_method)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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if (kEnableIndexIds && Runtime::Current()->GetJniIdType() != JniIdType::kPointer) {
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return Runtime::Current()->GetJniIdManager()->EncodeMethodId(art_method);
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} else {
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return reinterpret_cast<jmethodID>(art_method);
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}
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}
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template <bool kEnableIndexIds = true>
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ALWAYS_INLINE
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static inline ArtMethod* DecodeArtMethod(jmethodID method_id) {
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if (IsIndexId<kEnableIndexIds>(method_id)) {
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return Runtime::Current()->GetJniIdManager()->DecodeMethodId(method_id);
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} else {
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return reinterpret_cast<ArtMethod*>(method_id);
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}
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}
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} // namespace jni
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} // namespace art
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std::ostream& operator<<(std::ostream& os, const jobjectRefType& rhs);
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#endif // ART_RUNTIME_JNI_JNI_INTERNAL_H_
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