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/*
* Copyright (C) 2011 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.
*/
#ifndef ART_RUNTIME_JNI_JNI_INTERNAL_H_
#define ART_RUNTIME_JNI_JNI_INTERNAL_H_
#include <jni.h>
#include <iosfwd>
#include "base/locks.h"
#include "base/macros.h"
#include "reflective_handle.h"
#include "reflective_handle_scope.h"
#include "runtime.h"
#include "thread.h"
namespace art {
class ArtField;
class ArtMethod;
class ScopedObjectAccess;
const JNINativeInterface* GetJniNativeInterface();
const JNINativeInterface* GetRuntimeShutdownNativeInterface();
int ThrowNewException(JNIEnv* env, jclass exception_class, const char* msg, jobject cause);
// Enables native stack checking for field and method resolutions via JNI. This should be called
// during runtime initialization after libjavacore and libopenjdk have been dlopen()'ed.
void JniInitializeNativeCallerCheck();
// Removes native stack checking state.
void JniShutdownNativeCallerCheck();
// Finds the method using JNI semantics and initializes any classes. Does not encode the method in a
// JNI id
ArtMethod* FindMethodJNI(const ScopedObjectAccess& soa,
jclass java_class,
const char* name,
const char* sig,
bool is_static) REQUIRES_SHARED(Locks::mutator_lock_);
// Finds the field using JNI semantics and initializes any classes. Does not encode the method in a
// JNI id.
ArtField* FindFieldJNI(const ScopedObjectAccess& soa,
jclass java_class,
const char* name,
const char* sig,
bool is_static) REQUIRES_SHARED(Locks::mutator_lock_);
namespace jni {
// We want to maintain a branchless fast-path for performance reasons. The JniIdManager is the
// ultimate source of truth for how the IDs are handed out but we inline the normal non-index cases
// here.
template <bool kEnableIndexIds>
ALWAYS_INLINE
static bool IsIndexId(jmethodID mid) {
return kEnableIndexIds && ((reinterpret_cast<uintptr_t>(mid) % 2) != 0);
}
template <bool kEnableIndexIds>
ALWAYS_INLINE
static bool IsIndexId(jfieldID fid) {
return kEnableIndexIds && ((reinterpret_cast<uintptr_t>(fid) % 2) != 0);
}
template <bool kEnableIndexIds = true>
ALWAYS_INLINE
static inline ArtField* DecodeArtField(jfieldID fid) {
if (IsIndexId<kEnableIndexIds>(fid)) {
return Runtime::Current()->GetJniIdManager()->DecodeFieldId(fid);
} else {
return reinterpret_cast<ArtField*>(fid);
}
}
template <bool kEnableIndexIds = true>
ALWAYS_INLINE static inline jfieldID EncodeArtField(ReflectiveHandle<ArtField> field)
REQUIRES_SHARED(Locks::mutator_lock_) {
if (kEnableIndexIds && Runtime::Current()->GetJniIdType() != JniIdType::kPointer) {
return Runtime::Current()->GetJniIdManager()->EncodeFieldId(field);
} else {
return reinterpret_cast<jfieldID>(field.Get());
}
}
template <bool kEnableIndexIds = true>
ALWAYS_INLINE
static inline jfieldID EncodeArtField(ArtField* field) REQUIRES_SHARED(Locks::mutator_lock_) {
if (kEnableIndexIds && Runtime::Current()->GetJniIdType() != JniIdType::kPointer) {
return Runtime::Current()->GetJniIdManager()->EncodeFieldId(field);
} else {
return reinterpret_cast<jfieldID>(field);
}
}
template <bool kEnableIndexIds = true>
ALWAYS_INLINE
static inline jmethodID EncodeArtMethod(ReflectiveHandle<ArtMethod> art_method)
REQUIRES_SHARED(Locks::mutator_lock_) {
if (kEnableIndexIds && Runtime::Current()->GetJniIdType() != JniIdType::kPointer) {
return Runtime::Current()->GetJniIdManager()->EncodeMethodId(art_method);
} else {
return reinterpret_cast<jmethodID>(art_method.Get());
}
}
template <bool kEnableIndexIds = true>
ALWAYS_INLINE
static inline jmethodID EncodeArtMethod(ArtMethod* art_method)
REQUIRES_SHARED(Locks::mutator_lock_) {
if (kEnableIndexIds && Runtime::Current()->GetJniIdType() != JniIdType::kPointer) {
return Runtime::Current()->GetJniIdManager()->EncodeMethodId(art_method);
} else {
return reinterpret_cast<jmethodID>(art_method);
}
}
template <bool kEnableIndexIds = true>
ALWAYS_INLINE
static inline ArtMethod* DecodeArtMethod(jmethodID method_id) {
if (IsIndexId<kEnableIndexIds>(method_id)) {
return Runtime::Current()->GetJniIdManager()->DecodeMethodId(method_id);
} else {
return reinterpret_cast<ArtMethod*>(method_id);
}
}
} // namespace jni
} // namespace art
std::ostream& operator<<(std::ostream& os, const jobjectRefType& rhs);
#endif // ART_RUNTIME_JNI_JNI_INTERNAL_H_
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