/*
* Copyright (C) 2012 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 "interpreter_common.h"
#include <limits>
#include "mirror/string-inl.h"
namespace art {
namespace interpreter {
// Hand select a number of methods to be run in a not yet started runtime without using JNI.
static void UnstartedRuntimeJni(Thread* self, ArtMethod* method,
Object* receiver, uint32_t* args, JValue* result)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
std::string name(PrettyMethod(method));
if (name == "java.lang.Object dalvik.system.VMRuntime.newUnpaddedArray(java.lang.Class, int)") {
int32_t length = args[1];
DCHECK_GE(length, 0);
mirror::Class* element_class = reinterpret_cast<Object*>(args[0])->AsClass();
Runtime* runtime = Runtime::Current();
mirror::Class* array_class = runtime->GetClassLinker()->FindArrayClass(self, &element_class);
DCHECK(array_class != nullptr);
gc::AllocatorType allocator = runtime->GetHeap()->GetCurrentAllocator();
result->SetL(mirror::Array::Alloc<true>(self, array_class, length,
array_class->GetComponentSize(), allocator, true));
} else if (name == "java.lang.ClassLoader dalvik.system.VMStack.getCallingClassLoader()") {
result->SetL(NULL);
} else if (name == "java.lang.Class dalvik.system.VMStack.getStackClass2()") {
NthCallerVisitor visitor(self, 3);
visitor.WalkStack();
result->SetL(visitor.caller->GetDeclaringClass());
} else if (name == "double java.lang.Math.log(double)") {
JValue value;
value.SetJ((static_cast<uint64_t>(args[1]) << 32) | args[0]);
result->SetD(log(value.GetD()));
} else if (name == "java.lang.String java.lang.Class.getNameNative()") {
StackHandleScope<1> hs(self);
result->SetL(mirror::Class::ComputeName(hs.NewHandle(receiver->AsClass())));
} else if (name == "int java.lang.Float.floatToRawIntBits(float)") {
result->SetI(args[0]);
} else if (name == "float java.lang.Float.intBitsToFloat(int)") {
result->SetI(args[0]);
} else if (name == "double java.lang.Math.exp(double)") {
JValue value;
value.SetJ((static_cast<uint64_t>(args[1]) << 32) | args[0]);
result->SetD(exp(value.GetD()));
} else if (name == "java.lang.Object java.lang.Object.internalClone()") {
result->SetL(receiver->Clone(self));
} else if (name == "void java.lang.Object.notifyAll()") {
receiver->NotifyAll(self);
} else if (name == "int java.lang.String.compareTo(java.lang.String)") {
String* rhs = reinterpret_cast<Object*>(args[0])->AsString();
CHECK(rhs != NULL);
result->SetI(receiver->AsString()->CompareTo(rhs));
} else if (name == "java.lang.String java.lang.String.intern()") {
result->SetL(receiver->AsString()->Intern());
} else if (name == "int java.lang.String.fastIndexOf(int, int)") {
result->SetI(receiver->AsString()->FastIndexOf(args[0], args[1]));
} else if (name == "java.lang.Object java.lang.reflect.Array.createMultiArray(java.lang.Class, int[])") {
StackHandleScope<2> hs(self);
auto h_class(hs.NewHandle(reinterpret_cast<mirror::Class*>(args[0])->AsClass()));
auto h_dimensions(hs.NewHandle(reinterpret_cast<mirror::IntArray*>(args[1])->AsIntArray()));
result->SetL(Array::CreateMultiArray(self, h_class, h_dimensions));
} else if (name == "java.lang.Object java.lang.Throwable.nativeFillInStackTrace()") {
ScopedObjectAccessUnchecked soa(self);
if (Runtime::Current()->IsActiveTransaction()) {
result->SetL(soa.Decode<Object*>(self->CreateInternalStackTrace<true>(soa)));
} else {
result->SetL(soa.Decode<Object*>(self->CreateInternalStackTrace<false>(soa)));
}
} else if (name == "int java.lang.System.identityHashCode(java.lang.Object)") {
mirror::Object* obj = reinterpret_cast<Object*>(args[0]);
result->SetI((obj != nullptr) ? obj->IdentityHashCode() : 0);
} else if (name == "boolean java.nio.ByteOrder.isLittleEndian()") {
result->SetZ(JNI_TRUE);
} else if (name == "boolean sun.misc.Unsafe.compareAndSwapInt(java.lang.Object, long, int, int)") {
Object* obj = reinterpret_cast<Object*>(args[0]);
jlong offset = (static_cast<uint64_t>(args[2]) << 32) | args[1];
jint expectedValue = args[3];
jint newValue = args[4];
bool success;
if (Runtime::Current()->IsActiveTransaction()) {
success = obj->CasFieldStrongSequentiallyConsistent32<true>(MemberOffset(offset),
expectedValue, newValue);
} else {
success = obj->CasFieldStrongSequentiallyConsistent32<false>(MemberOffset(offset),
expectedValue, newValue);
}
result->SetZ(success ? JNI_TRUE : JNI_FALSE);
} else if (name == "void sun.misc.Unsafe.putObject(java.lang.Object, long, java.lang.Object)") {
Object* obj = reinterpret_cast<Object*>(args[0]);
jlong offset = (static_cast<uint64_t>(args[2]) << 32) | args[1];
Object* newValue = reinterpret_cast<Object*>(args[3]);
if (Runtime::Current()->IsActiveTransaction()) {
obj->SetFieldObject<true>(MemberOffset(offset), newValue);
} else {
obj->SetFieldObject<false>(MemberOffset(offset), newValue);
}
} else if (name == "int sun.misc.Unsafe.getArrayBaseOffsetForComponentType(java.lang.Class)") {
mirror::Class* component = reinterpret_cast<Object*>(args[0])->AsClass();
Primitive::Type primitive_type = component->GetPrimitiveType();
result->SetI(mirror::Array::DataOffset(Primitive::ComponentSize(primitive_type)).Int32Value());
} else if (name == "int sun.misc.Unsafe.getArrayIndexScaleForComponentType(java.lang.Class)") {
mirror::Class* component = reinterpret_cast<Object*>(args[0])->AsClass();
Primitive::Type primitive_type = component->GetPrimitiveType();
result->SetI(Primitive::ComponentSize(primitive_type));
} else if (Runtime::Current()->IsActiveTransaction()) {
AbortTransaction(self, "Attempt to invoke native method in non-started runtime: %s",
name.c_str());
} else {
LOG(FATAL) << "Calling native method " << PrettyMethod(method) << " in an unstarted "
"non-transactional runtime";
}
}
static void InterpreterJni(Thread* self, ArtMethod* method, const StringPiece& shorty,
Object* receiver, uint32_t* args, JValue* result)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
// TODO: The following enters JNI code using a typedef-ed function rather than the JNI compiler,
// it should be removed and JNI compiled stubs used instead.
ScopedObjectAccessUnchecked soa(self);
if (method->IsStatic()) {
if (shorty == "L") {
typedef jobject (fntype)(JNIEnv*, jclass);
fntype* const fn = reinterpret_cast<fntype*>(method->GetEntryPointFromJni());
ScopedLocalRef<jclass> klass(soa.Env(),
soa.AddLocalReference<jclass>(method->GetDeclaringClass()));
jobject jresult;
{
ScopedThreadStateChange tsc(self, kNative);
jresult = fn(soa.Env(), klass.get());
}
result->SetL(soa.Decode<Object*>(jresult));
} else if (shorty == "V") {
typedef void (fntype)(JNIEnv*, jclass);
fntype* const fn = reinterpret_cast<fntype*>(method->GetEntryPointFromJni());
ScopedLocalRef<jclass> klass(soa.Env(),
soa.AddLocalReference<jclass>(method->GetDeclaringClass()));
ScopedThreadStateChange tsc(self, kNative);
fn(soa.Env(), klass.get());
} else if (shorty == "Z") {
typedef jboolean (fntype)(JNIEnv*, jclass);
fntype* const fn = reinterpret_cast<fntype*>(method->GetEntryPointFromJni());
ScopedLocalRef<jclass> klass(soa.Env(),
soa.AddLocalReference<jclass>(method->GetDeclaringClass()));
ScopedThreadStateChange tsc(self, kNative);
result->SetZ(fn(soa.Env(), klass.get()));
} else if (shorty == "BI") {
typedef jbyte (fntype)(JNIEnv*, jclass, jint);
fntype* const fn = reinterpret_cast<fntype*>(method->GetEntryPointFromJni());
ScopedLocalRef<jclass> klass(soa.Env(),
soa.AddLocalReference<jclass>(method->GetDeclaringClass()));
ScopedThreadStateChange tsc(self, kNative);
result->SetB(fn(soa.Env(), klass.get(), args[0]));
} else if (shorty == "II") {
typedef jint (fntype)(JNIEnv*, jclass, jint);
fntype* const fn = reinterpret_cast<fntype*>(method->GetEntryPointFromJni());
ScopedLocalRef<jclass> klass(soa.Env(),
soa.AddLocalReference<jclass>(method->GetDeclaringClass()));
ScopedThreadStateChange tsc(self, kNative);
result->SetI(fn(soa.Env(), klass.get(), args[0]));
} else if (shorty == "LL") {
typedef jobject (fntype)(JNIEnv*, jclass, jobject);
fntype* const fn = reinterpret_cast<fntype*>(method->GetEntryPointFromJni());
ScopedLocalRef<jclass> klass(soa.Env(),
soa.AddLocalReference<jclass>(method->GetDeclaringClass()));
ScopedLocalRef<jobject> arg0(soa.Env(),
soa.AddLocalReference<jobject>(reinterpret_cast<Object*>(args[0])));
jobject jresult;
{
ScopedThreadStateChange tsc(self, kNative);
jresult = fn(soa.Env(), klass.get(), arg0.get());
}
result->SetL(soa.Decode<Object*>(jresult));
} else if (shorty == "IIZ") {
typedef jint (fntype)(JNIEnv*, jclass, jint, jboolean);
fntype* const fn = reinterpret_cast<fntype*>(method->GetEntryPointFromJni());
ScopedLocalRef<jclass> klass(soa.Env(),
soa.AddLocalReference<jclass>(method->GetDeclaringClass()));
ScopedThreadStateChange tsc(self, kNative);
result->SetI(fn(soa.Env(), klass.get(), args[0], args[1]));
} else if (shorty == "ILI") {
typedef jint (fntype)(JNIEnv*, jclass, jobject, jint);
fntype* const fn = reinterpret_cast<fntype*>(const_cast<void*>(
method->GetEntryPointFromJni()));
ScopedLocalRef<jclass> klass(soa.Env(),
soa.AddLocalReference<jclass>(method->GetDeclaringClass()));
ScopedLocalRef<jobject> arg0(soa.Env(),
soa.AddLocalReference<jobject>(reinterpret_cast<Object*>(args[0])));
ScopedThreadStateChange tsc(self, kNative);
result->SetI(fn(soa.Env(), klass.get(), arg0.get(), args[1]));
} else if (shorty == "SIZ") {
typedef jshort (fntype)(JNIEnv*, jclass, jint, jboolean);
fntype* const fn = reinterpret_cast<fntype*>(const_cast<void*>(method->GetEntryPointFromJni()));
ScopedLocalRef<jclass> klass(soa.Env(),
soa.AddLocalReference<jclass>(method->GetDeclaringClass()));
ScopedThreadStateChange tsc(self, kNative);
result->SetS(fn(soa.Env(), klass.get(), args[0], args[1]));
} else if (shorty == "VIZ") {
typedef void (fntype)(JNIEnv*, jclass, jint, jboolean);
fntype* const fn = reinterpret_cast<fntype*>(method->GetEntryPointFromJni());
ScopedLocalRef<jclass> klass(soa.Env(),
soa.AddLocalReference<jclass>(method->GetDeclaringClass()));
ScopedThreadStateChange tsc(self, kNative);
fn(soa.Env(), klass.get(), args[0], args[1]);
} else if (shorty == "ZLL") {
typedef jboolean (fntype)(JNIEnv*, jclass, jobject, jobject);
fntype* const fn = reinterpret_cast<fntype*>(method->GetEntryPointFromJni());
ScopedLocalRef<jclass> klass(soa.Env(),
soa.AddLocalReference<jclass>(method->GetDeclaringClass()));
ScopedLocalRef<jobject> arg0(soa.Env(),
soa.AddLocalReference<jobject>(reinterpret_cast<Object*>(args[0])));
ScopedLocalRef<jobject> arg1(soa.Env(),
soa.AddLocalReference<jobject>(reinterpret_cast<Object*>(args[1])));
ScopedThreadStateChange tsc(self, kNative);
result->SetZ(fn(soa.Env(), klass.get(), arg0.get(), arg1.get()));
} else if (shorty == "ZILL") {
typedef jboolean (fntype)(JNIEnv*, jclass, jint, jobject, jobject);
fntype* const fn = reinterpret_cast<fntype*>(method->GetEntryPointFromJni());
ScopedLocalRef<jclass> klass(soa.Env(),
soa.AddLocalReference<jclass>(method->GetDeclaringClass()));
ScopedLocalRef<jobject> arg1(soa.Env(),
soa.AddLocalReference<jobject>(reinterpret_cast<Object*>(args[1])));
ScopedLocalRef<jobject> arg2(soa.Env(),
soa.AddLocalReference<jobject>(reinterpret_cast<Object*>(args[2])));
ScopedThreadStateChange tsc(self, kNative);
result->SetZ(fn(soa.Env(), klass.get(), args[0], arg1.get(), arg2.get()));
} else if (shorty == "VILII") {
typedef void (fntype)(JNIEnv*, jclass, jint, jobject, jint, jint);
fntype* const fn = reinterpret_cast<fntype*>(method->GetEntryPointFromJni());
ScopedLocalRef<jclass> klass(soa.Env(),
soa.AddLocalReference<jclass>(method->GetDeclaringClass()));
ScopedLocalRef<jobject> arg1(soa.Env(),
soa.AddLocalReference<jobject>(reinterpret_cast<Object*>(args[1])));
ScopedThreadStateChange tsc(self, kNative);
fn(soa.Env(), klass.get(), args[0], arg1.get(), args[2], args[3]);
} else if (shorty == "VLILII") {
typedef void (fntype)(JNIEnv*, jclass, jobject, jint, jobject, jint, jint);
fntype* const fn = reinterpret_cast<fntype*>(method->GetEntryPointFromJni());
ScopedLocalRef<jclass> klass(soa.Env(),
soa.AddLocalReference<jclass>(method->GetDeclaringClass()));
ScopedLocalRef<jobject> arg0(soa.Env(),
soa.AddLocalReference<jobject>(reinterpret_cast<Object*>(args[0])));
ScopedLocalRef<jobject> arg2(soa.Env(),
soa.AddLocalReference<jobject>(reinterpret_cast<Object*>(args[2])));
ScopedThreadStateChange tsc(self, kNative);
fn(soa.Env(), klass.get(), arg0.get(), args[1], arg2.get(), args[3], args[4]);
} else {
LOG(FATAL) << "Do something with static native method: " << PrettyMethod(method)
<< " shorty: " << shorty;
}
} else {
if (shorty == "L") {
typedef jobject (fntype)(JNIEnv*, jobject);
fntype* const fn = reinterpret_cast<fntype*>(method->GetEntryPointFromJni());
ScopedLocalRef<jobject> rcvr(soa.Env(),
soa.AddLocalReference<jobject>(receiver));
jobject jresult;
{
ScopedThreadStateChange tsc(self, kNative);
jresult = fn(soa.Env(), rcvr.get());
}
result->SetL(soa.Decode<Object*>(jresult));
} else if (shorty == "V") {
typedef void (fntype)(JNIEnv*, jobject);
fntype* const fn = reinterpret_cast<fntype*>(method->GetEntryPointFromJni());
ScopedLocalRef<jobject> rcvr(soa.Env(),
soa.AddLocalReference<jobject>(receiver));
ScopedThreadStateChange tsc(self, kNative);
fn(soa.Env(), rcvr.get());
} else if (shorty == "LL") {
typedef jobject (fntype)(JNIEnv*, jobject, jobject);
fntype* const fn = reinterpret_cast<fntype*>(method->GetEntryPointFromJni());
ScopedLocalRef<jobject> rcvr(soa.Env(),
soa.AddLocalReference<jobject>(receiver));
ScopedLocalRef<jobject> arg0(soa.Env(),
soa.AddLocalReference<jobject>(reinterpret_cast<Object*>(args[0])));
jobject jresult;
{
ScopedThreadStateChange tsc(self, kNative);
jresult = fn(soa.Env(), rcvr.get(), arg0.get());
}
result->SetL(soa.Decode<Object*>(jresult));
ScopedThreadStateChange tsc(self, kNative);
} else if (shorty == "III") {
typedef jint (fntype)(JNIEnv*, jobject, jint, jint);
fntype* const fn = reinterpret_cast<fntype*>(method->GetEntryPointFromJni());
ScopedLocalRef<jobject> rcvr(soa.Env(),
soa.AddLocalReference<jobject>(receiver));
ScopedThreadStateChange tsc(self, kNative);
result->SetI(fn(soa.Env(), rcvr.get(), args[0], args[1]));
} else {
LOG(FATAL) << "Do something with native method: " << PrettyMethod(method)
<< " shorty: " << shorty;
}
}
}
enum InterpreterImplKind {
kSwitchImpl, // Switch-based interpreter implementation.
kComputedGotoImplKind // Computed-goto-based interpreter implementation.
};
#if !defined(__clang__)
static constexpr InterpreterImplKind kInterpreterImplKind = kComputedGotoImplKind;
#else
// Clang 3.4 fails to build the goto interpreter implementation.
static constexpr InterpreterImplKind kInterpreterImplKind = kSwitchImpl;
template<bool do_access_check, bool transaction_active>
JValue ExecuteGotoImpl(Thread* self, MethodHelper& mh, const DexFile::CodeItem* code_item,
ShadowFrame& shadow_frame, JValue result_register) {
LOG(FATAL) << "UNREACHABLE";
exit(0);
}
// Explicit definitions of ExecuteGotoImpl.
template<> SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
JValue ExecuteGotoImpl<true, false>(Thread* self, MethodHelper& mh,
const DexFile::CodeItem* code_item,
ShadowFrame& shadow_frame, JValue result_register);
template<> SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
JValue ExecuteGotoImpl<false, false>(Thread* self, MethodHelper& mh,
const DexFile::CodeItem* code_item,
ShadowFrame& shadow_frame, JValue result_register);
template<> SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
JValue ExecuteGotoImpl<true, true>(Thread* self, MethodHelper& mh,
const DexFile::CodeItem* code_item,
ShadowFrame& shadow_frame, JValue result_register);
template<> SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
JValue ExecuteGotoImpl<false, true>(Thread* self, MethodHelper& mh,
const DexFile::CodeItem* code_item,
ShadowFrame& shadow_frame, JValue result_register);
#endif
static JValue Execute(Thread* self, MethodHelper& mh, const DexFile::CodeItem* code_item,
ShadowFrame& shadow_frame, JValue result_register)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
static inline JValue Execute(Thread* self, MethodHelper& mh, const DexFile::CodeItem* code_item,
ShadowFrame& shadow_frame, JValue result_register) {
DCHECK(shadow_frame.GetMethod() == mh.GetMethod() ||
shadow_frame.GetMethod()->GetDeclaringClass()->IsProxyClass());
DCHECK(!shadow_frame.GetMethod()->IsAbstract());
DCHECK(!shadow_frame.GetMethod()->IsNative());
shadow_frame.GetMethod()->GetDeclaringClass()->AssertInitializedOrInitializingInThread(self);
bool transaction_active = Runtime::Current()->IsActiveTransaction();
if (LIKELY(shadow_frame.GetMethod()->IsPreverified())) {
// Enter the "without access check" interpreter.
if (kInterpreterImplKind == kSwitchImpl) {
if (transaction_active) {
return ExecuteSwitchImpl<false, true>(self, mh, code_item, shadow_frame, result_register);
} else {
return ExecuteSwitchImpl<false, false>(self, mh, code_item, shadow_frame, result_register);
}
} else {
DCHECK_EQ(kInterpreterImplKind, kComputedGotoImplKind);
if (transaction_active) {
return ExecuteGotoImpl<false, true>(self, mh, code_item, shadow_frame, result_register);
} else {
return ExecuteGotoImpl<false, false>(self, mh, code_item, shadow_frame, result_register);
}
}
} else {
// Enter the "with access check" interpreter.
if (kInterpreterImplKind == kSwitchImpl) {
if (transaction_active) {
return ExecuteSwitchImpl<true, true>(self, mh, code_item, shadow_frame, result_register);
} else {
return ExecuteSwitchImpl<true, false>(self, mh, code_item, shadow_frame, result_register);
}
} else {
DCHECK_EQ(kInterpreterImplKind, kComputedGotoImplKind);
if (transaction_active) {
return ExecuteGotoImpl<true, true>(self, mh, code_item, shadow_frame, result_register);
} else {
return ExecuteGotoImpl<true, false>(self, mh, code_item, shadow_frame, result_register);
}
}
}
}
void EnterInterpreterFromInvoke(Thread* self, ArtMethod* method, Object* receiver,
uint32_t* args, JValue* result) {
DCHECK_EQ(self, Thread::Current());
bool implicit_check = !Runtime::Current()->ExplicitStackOverflowChecks();
if (UNLIKELY(__builtin_frame_address(0) < self->GetStackEndForInterpreter(implicit_check))) {
ThrowStackOverflowError(self);
return;
}
const char* old_cause = self->StartAssertNoThreadSuspension("EnterInterpreterFromInvoke");
const DexFile::CodeItem* code_item = method->GetCodeItem();
uint16_t num_regs;
uint16_t num_ins;
if (code_item != NULL) {
num_regs = code_item->registers_size_;
num_ins = code_item->ins_size_;
} else if (method->IsAbstract()) {
self->EndAssertNoThreadSuspension(old_cause);
ThrowAbstractMethodError(method);
return;
} else {
DCHECK(method->IsNative());
num_regs = num_ins = ArtMethod::NumArgRegisters(method->GetShorty());
if (!method->IsStatic()) {
num_regs++;
num_ins++;
}
}
// Set up shadow frame with matching number of reference slots to vregs.
ShadowFrame* last_shadow_frame = self->GetManagedStack()->GetTopShadowFrame();
void* memory = alloca(ShadowFrame::ComputeSize(num_regs));
ShadowFrame* shadow_frame(ShadowFrame::Create(num_regs, last_shadow_frame, method, 0, memory));
self->PushShadowFrame(shadow_frame);
size_t cur_reg = num_regs - num_ins;
if (!method->IsStatic()) {
CHECK(receiver != NULL);
shadow_frame->SetVRegReference(cur_reg, receiver);
++cur_reg;
}
uint32_t shorty_len = 0;
const char* shorty = method->GetShorty(&shorty_len);
for (size_t shorty_pos = 0, arg_pos = 0; cur_reg < num_regs; ++shorty_pos, ++arg_pos, cur_reg++) {
DCHECK_LT(shorty_pos + 1, shorty_len);
switch (shorty[shorty_pos + 1]) {
case 'L': {
Object* o = reinterpret_cast<StackReference<Object>*>(&args[arg_pos])->AsMirrorPtr();
shadow_frame->SetVRegReference(cur_reg, o);
break;
}
case 'J': case 'D': {
uint64_t wide_value = (static_cast<uint64_t>(args[arg_pos + 1]) << 32) | args[arg_pos];
shadow_frame->SetVRegLong(cur_reg, wide_value);
cur_reg++;
arg_pos++;
break;
}
default:
shadow_frame->SetVReg(cur_reg, args[arg_pos]);
break;
}
}
self->EndAssertNoThreadSuspension(old_cause);
// Do this after populating the shadow frame in case EnsureInitialized causes a GC.
if (method->IsStatic() && UNLIKELY(!method->GetDeclaringClass()->IsInitialized())) {
ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
StackHandleScope<1> hs(self);
Handle<mirror::Class> h_class(hs.NewHandle(method->GetDeclaringClass()));
if (UNLIKELY(!class_linker->EnsureInitialized(h_class, true, true))) {
CHECK(self->IsExceptionPending());
self->PopShadowFrame();
return;
}
}
if (LIKELY(!method->IsNative())) {
StackHandleScope<1> hs(self);
MethodHelper mh(hs.NewHandle(method));
JValue r = Execute(self, mh, code_item, *shadow_frame, JValue());
if (result != NULL) {
*result = r;
}
} else {
// We don't expect to be asked to interpret native code (which is entered via a JNI compiler
// generated stub) except during testing and image writing.
// Update args to be the args in the shadow frame since the input ones could hold stale
// references pointers due to moving GC.
args = shadow_frame->GetVRegArgs(method->IsStatic() ? 0 : 1);
if (!Runtime::Current()->IsStarted()) {
UnstartedRuntimeJni(self, method, receiver, args, result);
} else {
InterpreterJni(self, method, shorty, receiver, args, result);
}
}
self->PopShadowFrame();
}
void EnterInterpreterFromDeoptimize(Thread* self, ShadowFrame* shadow_frame, JValue* ret_val)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
JValue value;
value.SetJ(ret_val->GetJ()); // Set value to last known result in case the shadow frame chain is empty.
while (shadow_frame != NULL) {
self->SetTopOfShadowStack(shadow_frame);
StackHandleScope<1> hs(self);
MethodHelper mh(hs.NewHandle(shadow_frame->GetMethod()));
const DexFile::CodeItem* code_item = mh.GetMethod()->GetCodeItem();
const uint32_t dex_pc = shadow_frame->GetDexPC();
uint32_t new_dex_pc;
if (UNLIKELY(self->IsExceptionPending())) {
const instrumentation::Instrumentation* const instrumentation =
Runtime::Current()->GetInstrumentation();
uint32_t found_dex_pc = FindNextInstructionFollowingException(self, *shadow_frame, dex_pc,
instrumentation);
new_dex_pc = found_dex_pc; // the dex pc of a matching catch handler
// or DexFile::kDexNoIndex if there is none.
} else {
const Instruction* instr = Instruction::At(&code_item->insns_[dex_pc]);
new_dex_pc = dex_pc + instr->SizeInCodeUnits(); // the dex pc of the next instruction.
}
if (new_dex_pc != DexFile::kDexNoIndex) {
shadow_frame->SetDexPC(new_dex_pc);
value = Execute(self, mh, code_item, *shadow_frame, value);
}
ShadowFrame* old_frame = shadow_frame;
shadow_frame = shadow_frame->GetLink();
delete old_frame;
}
ret_val->SetJ(value.GetJ());
}
JValue EnterInterpreterFromStub(Thread* self, MethodHelper& mh, const DexFile::CodeItem* code_item,
ShadowFrame& shadow_frame) {
DCHECK_EQ(self, Thread::Current());
bool implicit_check = !Runtime::Current()->ExplicitStackOverflowChecks();
if (UNLIKELY(__builtin_frame_address(0) < self->GetStackEndForInterpreter(implicit_check))) {
ThrowStackOverflowError(self);
return JValue();
}
return Execute(self, mh, code_item, shadow_frame, JValue());
}
extern "C" void artInterpreterToInterpreterBridge(Thread* self, MethodHelper& mh,
const DexFile::CodeItem* code_item,
ShadowFrame* shadow_frame, JValue* result) {
bool implicit_check = !Runtime::Current()->ExplicitStackOverflowChecks();
if (UNLIKELY(__builtin_frame_address(0) < self->GetStackEndForInterpreter(implicit_check))) {
ThrowStackOverflowError(self);
return;
}
self->PushShadowFrame(shadow_frame);
ArtMethod* method = shadow_frame->GetMethod();
// Ensure static methods are initialized.
if (method->IsStatic()) {
mirror::Class* declaring_class = method->GetDeclaringClass();
if (UNLIKELY(!declaring_class->IsInitialized())) {
StackHandleScope<1> hs(self);
HandleWrapper<Class> h_declaring_class(hs.NewHandleWrapper(&declaring_class));
if (UNLIKELY(!Runtime::Current()->GetClassLinker()->EnsureInitialized(
h_declaring_class, true, true))) {
DCHECK(self->IsExceptionPending());
self->PopShadowFrame();
return;
}
CHECK(h_declaring_class->IsInitializing());
}
}
if (LIKELY(!method->IsNative())) {
result->SetJ(Execute(self, mh, code_item, *shadow_frame, JValue()).GetJ());
} else {
// We don't expect to be asked to interpret native code (which is entered via a JNI compiler
// generated stub) except during testing and image writing.
CHECK(!Runtime::Current()->IsStarted());
Object* receiver = method->IsStatic() ? nullptr : shadow_frame->GetVRegReference(0);
uint32_t* args = shadow_frame->GetVRegArgs(method->IsStatic() ? 0 : 1);
UnstartedRuntimeJni(self, method, receiver, args, result);
}
self->PopShadowFrame();
}
} // namespace interpreter
} // namespace art