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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.
*/
#include "jni_env_ext.h"
#include "check_jni.h"
#include "indirect_reference_table.h"
#include "java_vm_ext.h"
#include "jni_internal.h"
namespace art {
static constexpr size_t kMonitorsInitial = 32; // Arbitrary.
static constexpr size_t kMonitorsMax = 4096; // Arbitrary sanity check.
static constexpr size_t kLocalsInitial = 64; // Arbitrary.
JNIEnvExt::JNIEnvExt(Thread* self, JavaVMExt* vm)
: self(self),
vm(vm),
local_ref_cookie(IRT_FIRST_SEGMENT),
locals(kLocalsInitial, kLocalsMax, kLocal),
check_jni(false),
critical(0),
monitors("monitors", kMonitorsInitial, kMonitorsMax) {
functions = unchecked_functions = GetJniNativeInterface();
if (vm->IsCheckJniEnabled()) {
SetCheckJniEnabled(true);
}
}
JNIEnvExt::~JNIEnvExt() {
}
jobject JNIEnvExt::NewLocalRef(mirror::Object* obj) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
if (obj == nullptr) {
return nullptr;
}
return reinterpret_cast<jobject>(locals.Add(local_ref_cookie, obj));
}
void JNIEnvExt::DeleteLocalRef(jobject obj) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
if (obj != nullptr) {
locals.Remove(local_ref_cookie, reinterpret_cast<IndirectRef>(obj));
}
}
void JNIEnvExt::SetCheckJniEnabled(bool enabled) {
check_jni = enabled;
functions = enabled ? GetCheckJniNativeInterface() : GetJniNativeInterface();
}
void JNIEnvExt::DumpReferenceTables(std::ostream& os) {
locals.Dump(os);
monitors.Dump(os);
}
void JNIEnvExt::PushFrame(int capacity) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
UNUSED(capacity); // cpplint gets confused with (int) and thinks its a cast.
// TODO: take 'capacity' into account.
stacked_local_ref_cookies.push_back(local_ref_cookie);
local_ref_cookie = locals.GetSegmentState();
}
void JNIEnvExt::PopFrame() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
locals.SetSegmentState(local_ref_cookie);
local_ref_cookie = stacked_local_ref_cookies.back();
stacked_local_ref_cookies.pop_back();
}
Offset JNIEnvExt::SegmentStateOffset() {
return Offset(OFFSETOF_MEMBER(JNIEnvExt, locals) +
IndirectReferenceTable::SegmentStateOffset().Int32Value());
}
} // namespace art