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* Copyright (C) 2015 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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#include "jni.h"
#include "base/logging.h"
#include "dex_file-inl.h"
#include "jni_internal.h"
#include "mirror/class-inl.h"
#include "nth_caller_visitor.h"
#include "oat_file.h"
#include "runtime.h"
#include "scoped_thread_state_change-inl.h"
#include "stack.h"
#include "thread-inl.h"
namespace art {
static bool asserts_enabled = true;
// public static native void disableStackFrameAsserts();
// Note: to globally disable asserts in unsupported configurations.
extern "C" JNIEXPORT void JNICALL Java_Main_disableStackFrameAsserts(JNIEnv* env ATTRIBUTE_UNUSED,
jclass cls ATTRIBUTE_UNUSED) {
asserts_enabled = false;
static jboolean IsInterpreted(JNIEnv* env, jclass, size_t level) {
ScopedObjectAccess soa(env);
NthCallerVisitor caller(soa.Self(), level, false);
CHECK(caller.caller != nullptr);
return caller.GetCurrentShadowFrame() != nullptr ? JNI_TRUE : JNI_FALSE;
// public static native boolean isInterpreted();
extern "C" JNIEXPORT jboolean JNICALL Java_Main_isInterpreted(JNIEnv* env, jclass klass) {
return IsInterpreted(env, klass, 1);
// public static native boolean isInterpreted(int depth);
extern "C" JNIEXPORT jboolean JNICALL Java_Main_isInterpretedAt(JNIEnv* env,
jclass klass,
jint depth) {
return IsInterpreted(env, klass, depth);
// public static native boolean isInterpretedFunction(String smali);
// TODO Remove 'allow_runtime_frames' option once we have deoptimization through runtime frames.
struct MethodIsInterpretedVisitor : public StackVisitor {
MethodIsInterpretedVisitor(Thread* thread, ArtMethod* goal, bool require_deoptable)
: StackVisitor(thread, nullptr, StackVisitor::StackWalkKind::kIncludeInlinedFrames),
require_deoptable_(require_deoptable) {}
virtual bool VisitFrame() OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) {
if (goal_ == GetMethod()) {
method_is_interpreted_ = (require_deoptable_ && prev_was_runtime_) || IsShadowFrame();
method_found_ = true;
return false;
prev_was_runtime_ = GetMethod()->IsRuntimeMethod();
return true;
bool IsInterpreted() {
return method_is_interpreted_;
bool IsFound() {
return method_found_;
const ArtMethod* goal_;
bool method_is_interpreted_;
bool method_found_;
bool prev_was_runtime_;
bool require_deoptable_;
// TODO Remove 'require_deoptimizable' option once we have deoptimization through runtime frames.
extern "C" JNIEXPORT jboolean JNICALL Java_Main_isInterpretedFunction(
JNIEnv* env, jclass klass ATTRIBUTE_UNUSED, jobject method, jboolean require_deoptimizable) {
// Return false if this seems to not be an ART runtime.
if (Runtime::Current() == nullptr) {
return JNI_FALSE;
if (method == nullptr) {
env->ThrowNew(env->FindClass("java/lang/NullPointerException"), "method is null!");
return JNI_FALSE;
jmethodID id = env->FromReflectedMethod(method);
if (id == nullptr) {
env->ThrowNew(env->FindClass("java/lang/Error"), "Unable to interpret method argument!");
return JNI_FALSE;
bool result;
bool found;
ScopedObjectAccess soa(env);
ArtMethod* goal = jni::DecodeArtMethod(id);
MethodIsInterpretedVisitor v(soa.Self(), goal, require_deoptimizable);
bool enters_interpreter = Runtime::Current()->GetClassLinker()->IsQuickToInterpreterBridge(
result = (v.IsInterpreted() || enters_interpreter);
found = v.IsFound();
if (!found) {
env->ThrowNew(env->FindClass("java/lang/Error"), "Unable to find given method in stack!");
return JNI_FALSE;
return result;
// public static native void assertIsInterpreted();
extern "C" JNIEXPORT void JNICALL Java_Main_assertIsInterpreted(JNIEnv* env, jclass klass) {
if (asserts_enabled) {
CHECK(Java_Main_isInterpreted(env, klass));
static jboolean IsManaged(JNIEnv* env, jclass cls, size_t level) {
ScopedObjectAccess soa(env);
ObjPtr<mirror::Class> klass = soa.Decode<mirror::Class>(cls);
const DexFile& dex_file = klass->GetDexFile();
const OatFile::OatDexFile* oat_dex_file = dex_file.GetOatDexFile();
if (oat_dex_file == nullptr) {
// No oat file, this must be a test configuration that doesn't compile at all. Ignore that the
// result will be that we're running the interpreter.
return JNI_FALSE;
NthCallerVisitor caller(soa.Self(), level, false);
CHECK(caller.caller != nullptr);
return caller.GetCurrentShadowFrame() != nullptr ? JNI_FALSE : JNI_TRUE;
// public static native boolean isManaged();
extern "C" JNIEXPORT jboolean JNICALL Java_Main_isManaged(JNIEnv* env, jclass cls) {
return IsManaged(env, cls, 1);
// public static native void assertIsManaged();
extern "C" JNIEXPORT void JNICALL Java_Main_assertIsManaged(JNIEnv* env, jclass cls) {
if (asserts_enabled) {
CHECK(Java_Main_isManaged(env, cls));
// public static native boolean isCallerInterpreted();
extern "C" JNIEXPORT jboolean JNICALL Java_Main_isCallerInterpreted(JNIEnv* env, jclass klass) {
return IsInterpreted(env, klass, 2);
// public static native void assertCallerIsInterpreted();
extern "C" JNIEXPORT void JNICALL Java_Main_assertCallerIsInterpreted(JNIEnv* env, jclass klass) {
if (asserts_enabled) {
CHECK(Java_Main_isCallerInterpreted(env, klass));
// public static native boolean isCallerManaged();
extern "C" JNIEXPORT jboolean JNICALL Java_Main_isCallerManaged(JNIEnv* env, jclass cls) {
return IsManaged(env, cls, 2);
// public static native void assertCallerIsManaged();
extern "C" JNIEXPORT void JNICALL Java_Main_assertCallerIsManaged(JNIEnv* env, jclass cls) {
if (asserts_enabled) {
CHECK(Java_Main_isCallerManaged(env, cls));
} // namespace art