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/*
* 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 "entrypoints/entrypoint_utils.h"
#include "art_field-inl.h"
#include "art_method-inl.h"
#include "base/enums.h"
#include "base/mutex.h"
#include "base/sdk_version.h"
#include "class_linker-inl.h"
#include "dex/dex_file-inl.h"
#include "entrypoints/entrypoint_utils-inl.h"
#include "entrypoints/quick/callee_save_frame.h"
#include "entrypoints/runtime_asm_entrypoints.h"
#include "gc/accounting/card_table-inl.h"
#include "jni/java_vm_ext.h"
#include "mirror/class-inl.h"
#include "mirror/method.h"
#include "mirror/object-inl.h"
#include "mirror/object_array-inl.h"
#include "nth_caller_visitor.h"
#include "oat_quick_method_header.h"
#include "reflection.h"
#include "scoped_thread_state_change-inl.h"
#include "well_known_classes.h"
namespace art {
void CheckReferenceResult(Handle<mirror::Object> o, Thread* self) {
if (o == nullptr) {
return;
}
// Make sure that the result is an instance of the type this method was expected to return.
ArtMethod* method = self->GetCurrentMethod(nullptr);
ObjPtr<mirror::Class> return_type = method->ResolveReturnType();
if (!o->InstanceOf(return_type)) {
Runtime::Current()->GetJavaVM()->JniAbortF(nullptr,
"attempt to return an instance of %s from %s",
o->PrettyTypeOf().c_str(),
method->PrettyMethod().c_str());
}
}
JValue InvokeProxyInvocationHandler(ScopedObjectAccessAlreadyRunnable& soa,
const char* shorty,
jobject rcvr_jobj,
jobject interface_method_jobj,
std::vector<jvalue>& args) {
DCHECK(soa.Env()->IsInstanceOf(rcvr_jobj, WellKnownClasses::java_lang_reflect_Proxy));
// Build argument array possibly triggering GC.
soa.Self()->AssertThreadSuspensionIsAllowable();
jobjectArray args_jobj = nullptr;
const JValue zero;
uint32_t target_sdk_version = Runtime::Current()->GetTargetSdkVersion();
// Do not create empty arrays unless needed to maintain Dalvik bug compatibility.
if (args.size() > 0 || IsSdkVersionSetAndAtMost(target_sdk_version, SdkVersion::kL)) {
args_jobj = soa.Env()->NewObjectArray(args.size(), WellKnownClasses::java_lang_Object, nullptr);
if (args_jobj == nullptr) {
CHECK(soa.Self()->IsExceptionPending());
return zero;
}
for (size_t i = 0; i < args.size(); ++i) {
if (shorty[i + 1] == 'L') {
jobject val = args[i].l;
soa.Env()->SetObjectArrayElement(args_jobj, i, val);
} else {
JValue jv;
jv.SetJ(args[i].j);
ObjPtr<mirror::Object> val = BoxPrimitive(Primitive::GetType(shorty[i + 1]), jv);
if (val == nullptr) {
CHECK(soa.Self()->IsExceptionPending());
return zero;
}
soa.Decode<mirror::ObjectArray<mirror::Object>>(args_jobj)->Set<false>(i, val);
}
}
}
// Call Proxy.invoke(Proxy proxy, Method method, Object[] args).
jvalue invocation_args[3];
invocation_args[0].l = rcvr_jobj;
invocation_args[1].l = interface_method_jobj;
invocation_args[2].l = args_jobj;
jobject result =
soa.Env()->CallStaticObjectMethodA(WellKnownClasses::java_lang_reflect_Proxy,
WellKnownClasses::java_lang_reflect_Proxy_invoke,
invocation_args);
// Unbox result and handle error conditions.
if (LIKELY(!soa.Self()->IsExceptionPending())) {
if (shorty[0] == 'V' || (shorty[0] == 'L' && result == nullptr)) {
// Do nothing.
return zero;
} else {
ArtMethod* interface_method =
soa.Decode<mirror::Method>(interface_method_jobj)->GetArtMethod();
// This can cause thread suspension.
ObjPtr<mirror::Class> result_type = interface_method->ResolveReturnType();
ObjPtr<mirror::Object> result_ref = soa.Decode<mirror::Object>(result);
JValue result_unboxed;
if (!UnboxPrimitiveForResult(result_ref, result_type, &result_unboxed)) {
DCHECK(soa.Self()->IsExceptionPending());
return zero;
}
return result_unboxed;
}
} else {
// In the case of checked exceptions that aren't declared, the exception must be wrapped by
// a UndeclaredThrowableException.
ObjPtr<mirror::Throwable> exception = soa.Self()->GetException();
if (exception->IsCheckedException()) {
bool declares_exception = false;
{
ScopedAssertNoThreadSuspension ants(__FUNCTION__);
ObjPtr<mirror::Object> rcvr = soa.Decode<mirror::Object>(rcvr_jobj);
ObjPtr<mirror::Class> proxy_class = rcvr->GetClass();
ObjPtr<mirror::Method> interface_method = soa.Decode<mirror::Method>(interface_method_jobj);
ArtMethod* proxy_method = rcvr->GetClass()->FindVirtualMethodForInterface(
interface_method->GetArtMethod(), kRuntimePointerSize);
auto virtual_methods = proxy_class->GetVirtualMethodsSlice(kRuntimePointerSize);
size_t num_virtuals = proxy_class->NumVirtualMethods();
size_t method_size = ArtMethod::Size(kRuntimePointerSize);
// Rely on the fact that the methods are contiguous to determine the index of the method in
// the slice.
int throws_index = (reinterpret_cast<uintptr_t>(proxy_method) -
reinterpret_cast<uintptr_t>(&virtual_methods[0])) / method_size;
CHECK_LT(throws_index, static_cast<int>(num_virtuals));
ObjPtr<mirror::ObjectArray<mirror::Class>> declared_exceptions =
proxy_class->GetProxyThrows()->Get(throws_index);
ObjPtr<mirror::Class> exception_class = exception->GetClass();
for (int32_t i = 0; i < declared_exceptions->GetLength() && !declares_exception; i++) {
ObjPtr<mirror::Class> declared_exception = declared_exceptions->Get(i);
declares_exception = declared_exception->IsAssignableFrom(exception_class);
}
}
if (!declares_exception) {
soa.Self()->ThrowNewWrappedException("Ljava/lang/reflect/UndeclaredThrowableException;",
nullptr);
}
}
return zero;
}
}
bool FillArrayData(ObjPtr<mirror::Object> obj, const Instruction::ArrayDataPayload* payload) {
DCHECK_EQ(payload->ident, static_cast<uint16_t>(Instruction::kArrayDataSignature));
if (UNLIKELY(obj == nullptr)) {
ThrowNullPointerException("null array in FILL_ARRAY_DATA");
return false;
}
ObjPtr<mirror::Array> array = obj->AsArray();
DCHECK(!array->IsObjectArray());
if (UNLIKELY(static_cast<int32_t>(payload->element_count) > array->GetLength())) {
Thread* self = Thread::Current();
self->ThrowNewExceptionF("Ljava/lang/ArrayIndexOutOfBoundsException;",
"failed FILL_ARRAY_DATA; length=%d, index=%d",
array->GetLength(), payload->element_count);
return false;
}
// Copy data from dex file to memory assuming both are little endian.
uint32_t size_in_bytes = payload->element_count * payload->element_width;
memcpy(array->GetRawData(payload->element_width, 0), payload->data, size_in_bytes);
return true;
}
static inline std::pair<ArtMethod*, uintptr_t> DoGetCalleeSaveMethodOuterCallerAndPc(
ArtMethod** sp, CalleeSaveType type) REQUIRES_SHARED(Locks::mutator_lock_) {
DCHECK_EQ(*sp, Runtime::Current()->GetCalleeSaveMethod(type));
const size_t callee_frame_size = RuntimeCalleeSaveFrame::GetFrameSize(type);
auto** caller_sp = reinterpret_cast<ArtMethod**>(
reinterpret_cast<uintptr_t>(sp) + callee_frame_size);
const size_t callee_return_pc_offset = RuntimeCalleeSaveFrame::GetReturnPcOffset(type);
uintptr_t caller_pc = *reinterpret_cast<uintptr_t*>(
(reinterpret_cast<uint8_t*>(sp) + callee_return_pc_offset));
ArtMethod* outer_method = *caller_sp;
return std::make_pair(outer_method, caller_pc);
}
static inline ArtMethod* DoGetCalleeSaveMethodCaller(ArtMethod* outer_method,
uintptr_t caller_pc,
bool do_caller_check)
REQUIRES_SHARED(Locks::mutator_lock_) {
ArtMethod* caller = outer_method;
if (LIKELY(caller_pc != reinterpret_cast<uintptr_t>(GetQuickInstrumentationExitPc()))) {
if (outer_method != nullptr) {
const OatQuickMethodHeader* current_code = outer_method->GetOatQuickMethodHeader(caller_pc);
DCHECK(current_code != nullptr);
DCHECK(current_code->IsOptimized());
if (CodeInfo::HasInlineInfo(current_code->GetOptimizedCodeInfoPtr())) {
uintptr_t native_pc_offset = current_code->NativeQuickPcOffset(caller_pc);
CodeInfo code_info = CodeInfo::DecodeInlineInfoOnly(current_code);
StackMap stack_map = code_info.GetStackMapForNativePcOffset(native_pc_offset);
DCHECK(stack_map.IsValid());
BitTableRange<InlineInfo> inline_infos = code_info.GetInlineInfosOf(stack_map);
if (!inline_infos.empty()) {
caller = GetResolvedMethod(outer_method, code_info, inline_infos);
}
}
}
if (kIsDebugBuild && do_caller_check) {
// Note that do_caller_check is optional, as this method can be called by
// stubs, and tests without a proper call stack.
NthCallerVisitor visitor(Thread::Current(), 1, true);
visitor.WalkStack();
CHECK_EQ(caller, visitor.caller);
}
} else {
// We're instrumenting, just use the StackVisitor which knows how to
// handle instrumented frames.
NthCallerVisitor visitor(Thread::Current(), 1, true);
visitor.WalkStack();
caller = visitor.caller;
}
return caller;
}
ArtMethod* GetCalleeSaveMethodCaller(ArtMethod** sp, CalleeSaveType type, bool do_caller_check)
REQUIRES_SHARED(Locks::mutator_lock_) {
ScopedAssertNoThreadSuspension ants(__FUNCTION__);
auto outer_caller_and_pc = DoGetCalleeSaveMethodOuterCallerAndPc(sp, type);
ArtMethod* outer_method = outer_caller_and_pc.first;
uintptr_t caller_pc = outer_caller_and_pc.second;
ArtMethod* caller = DoGetCalleeSaveMethodCaller(outer_method, caller_pc, do_caller_check);
return caller;
}
CallerAndOuterMethod GetCalleeSaveMethodCallerAndOuterMethod(Thread* self, CalleeSaveType type) {
CallerAndOuterMethod result;
ScopedAssertNoThreadSuspension ants(__FUNCTION__);
ArtMethod** sp = self->GetManagedStack()->GetTopQuickFrameKnownNotTagged();
auto outer_caller_and_pc = DoGetCalleeSaveMethodOuterCallerAndPc(sp, type);
result.outer_method = outer_caller_and_pc.first;
uintptr_t caller_pc = outer_caller_and_pc.second;
result.caller =
DoGetCalleeSaveMethodCaller(result.outer_method, caller_pc, /* do_caller_check= */ true);
return result;
}
ArtMethod* GetCalleeSaveOuterMethod(Thread* self, CalleeSaveType type) {
ScopedAssertNoThreadSuspension ants(__FUNCTION__);
ArtMethod** sp = self->GetManagedStack()->GetTopQuickFrameKnownNotTagged();
return DoGetCalleeSaveMethodOuterCallerAndPc(sp, type).first;
}
ObjPtr<mirror::MethodHandle> ResolveMethodHandleFromCode(ArtMethod* referrer,
uint32_t method_handle_idx) {
Thread::PoisonObjectPointersIfDebug();
ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
return class_linker->ResolveMethodHandle(Thread::Current(), method_handle_idx, referrer);
}
ObjPtr<mirror::MethodType> ResolveMethodTypeFromCode(ArtMethod* referrer,
dex::ProtoIndex proto_idx) {
Thread::PoisonObjectPointersIfDebug();
ObjPtr<mirror::MethodType> method_type =
referrer->GetDexCache()->GetResolvedMethodType(proto_idx);
if (UNLIKELY(method_type == nullptr)) {
StackHandleScope<2> hs(Thread::Current());
Handle<mirror::DexCache> dex_cache(hs.NewHandle(referrer->GetDexCache()));
Handle<mirror::ClassLoader> class_loader(hs.NewHandle(referrer->GetClassLoader()));
ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
method_type = class_linker->ResolveMethodType(hs.Self(), proto_idx, dex_cache, class_loader);
}
return method_type;
}
} // namespace art