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/*
* Copyright (C) 2008 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 "java_lang_DexCache.h"
#include "dex_file.h"
#include "dex_file_types.h"
#include "jni_internal.h"
#include "mirror/class-inl.h"
#include "mirror/dex_cache-inl.h"
#include "mirror/object-inl.h"
#include "scoped_fast_native_object_access-inl.h"
#include "well_known_classes.h"
namespace art {
static jobject DexCache_getDexNative(JNIEnv* env, jobject javaDexCache) {
ScopedFastNativeObjectAccess soa(env);
ObjPtr<mirror::DexCache> dex_cache = soa.Decode<mirror::DexCache>(javaDexCache);
// Should only be called while holding the lock on the dex cache.
DCHECK_EQ(dex_cache->GetLockOwnerThreadId(), soa.Self()->GetThreadId());
const DexFile* dex_file = dex_cache->GetDexFile();
if (dex_file == nullptr) {
return nullptr;
}
void* address = const_cast<void*>(reinterpret_cast<const void*>(dex_file->Begin()));
jobject byte_buffer = env->NewDirectByteBuffer(address, dex_file->Size());
if (byte_buffer == nullptr) {
DCHECK(soa.Self()->IsExceptionPending());
return nullptr;
}
jvalue args[1];
args[0].l = byte_buffer;
return env->CallStaticObjectMethodA(WellKnownClasses::com_android_dex_Dex,
WellKnownClasses::com_android_dex_Dex_create,
args);
}
static jobject DexCache_getResolvedType(JNIEnv* env, jobject javaDexCache, jint type_index) {
ScopedFastNativeObjectAccess soa(env);
ObjPtr<mirror::DexCache> dex_cache = soa.Decode<mirror::DexCache>(javaDexCache);
CHECK_LT(static_cast<size_t>(type_index), dex_cache->GetDexFile()->NumTypeIds());
return soa.AddLocalReference<jobject>(dex_cache->GetResolvedType(dex::TypeIndex(type_index)));
}
static jobject DexCache_getResolvedString(JNIEnv* env, jobject javaDexCache, jint string_index) {
ScopedFastNativeObjectAccess soa(env);
ObjPtr<mirror::DexCache> dex_cache = soa.Decode<mirror::DexCache>(javaDexCache);
CHECK_LT(static_cast<size_t>(string_index), dex_cache->GetDexFile()->NumStringIds());
return soa.AddLocalReference<jobject>(
dex_cache->GetResolvedString(dex::StringIndex(string_index)));
}
static void DexCache_setResolvedType(JNIEnv* env,
jobject javaDexCache,
jint type_index,
jobject type) {
ScopedFastNativeObjectAccess soa(env);
ObjPtr<mirror::DexCache> dex_cache = soa.Decode<mirror::DexCache>(javaDexCache);
const DexFile& dex_file = *dex_cache->GetDexFile();
CHECK_LT(static_cast<size_t>(type_index), dex_file.NumTypeIds());
ObjPtr<mirror::Class> t = soa.Decode<mirror::Class>(type);
if (t != nullptr && t->DescriptorEquals(dex_file.StringByTypeIdx(dex::TypeIndex(type_index)))) {
ClassTable* table =
Runtime::Current()->GetClassLinker()->FindClassTable(soa.Self(), dex_cache);
if (table != nullptr && table->TryInsert(t) == t) {
dex_cache->SetResolvedType(dex::TypeIndex(type_index), t);
}
}
}
static void DexCache_setResolvedString(JNIEnv* env, jobject javaDexCache, jint string_index,
jobject string) {
ScopedFastNativeObjectAccess soa(env);
ObjPtr<mirror::DexCache> dex_cache = soa.Decode<mirror::DexCache>(javaDexCache);
CHECK_LT(static_cast<size_t>(string_index), dex_cache->GetDexFile()->NumStringIds());
ObjPtr<mirror::String> s = soa.Decode<mirror::String>(string);
if (s != nullptr) {
dex_cache->SetResolvedString(dex::StringIndex(string_index), s);
}
}
static JNINativeMethod gMethods[] = {
NATIVE_METHOD(DexCache, getDexNative, "!()Lcom/android/dex/Dex;"),
NATIVE_METHOD(DexCache, getResolvedType, "!(I)Ljava/lang/Class;"),
NATIVE_METHOD(DexCache, getResolvedString, "!(I)Ljava/lang/String;"),
NATIVE_METHOD(DexCache, setResolvedType, "!(ILjava/lang/Class;)V"),
NATIVE_METHOD(DexCache, setResolvedString, "!(ILjava/lang/String;)V"),
};
void register_java_lang_DexCache(JNIEnv* env) {
REGISTER_NATIVE_METHODS("java/lang/DexCache");
}
} // namespace art
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