| /* |
| * 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 "reflection-inl.h" |
| |
| #include "art_field-inl.h" |
| #include "art_method-inl.h" |
| #include "base/enums.h" |
| #include "class_linker.h" |
| #include "common_throws.h" |
| #include "dex_file-inl.h" |
| #include "indirect_reference_table-inl.h" |
| #include "jni_internal.h" |
| #include "mirror/class-inl.h" |
| #include "mirror/executable.h" |
| #include "mirror/object_array-inl.h" |
| #include "nth_caller_visitor.h" |
| #include "scoped_thread_state_change-inl.h" |
| #include "stack_reference.h" |
| #include "well_known_classes.h" |
| |
| namespace art { |
| |
| class ArgArray { |
| public: |
| ArgArray(const char* shorty, uint32_t shorty_len) |
| : shorty_(shorty), shorty_len_(shorty_len), num_bytes_(0) { |
| size_t num_slots = shorty_len + 1; // +1 in case of receiver. |
| if (LIKELY((num_slots * 2) < kSmallArgArraySize)) { |
| // We can trivially use the small arg array. |
| arg_array_ = small_arg_array_; |
| } else { |
| // Analyze shorty to see if we need the large arg array. |
| for (size_t i = 1; i < shorty_len; ++i) { |
| char c = shorty[i]; |
| if (c == 'J' || c == 'D') { |
| num_slots++; |
| } |
| } |
| if (num_slots <= kSmallArgArraySize) { |
| arg_array_ = small_arg_array_; |
| } else { |
| large_arg_array_.reset(new uint32_t[num_slots]); |
| arg_array_ = large_arg_array_.get(); |
| } |
| } |
| } |
| |
| uint32_t* GetArray() { |
| return arg_array_; |
| } |
| |
| uint32_t GetNumBytes() { |
| return num_bytes_; |
| } |
| |
| void Append(uint32_t value) { |
| arg_array_[num_bytes_ / 4] = value; |
| num_bytes_ += 4; |
| } |
| |
| void Append(ObjPtr<mirror::Object> obj) REQUIRES_SHARED(Locks::mutator_lock_) { |
| Append(StackReference<mirror::Object>::FromMirrorPtr(obj.Ptr()).AsVRegValue()); |
| } |
| |
| void AppendWide(uint64_t value) { |
| arg_array_[num_bytes_ / 4] = value; |
| arg_array_[(num_bytes_ / 4) + 1] = value >> 32; |
| num_bytes_ += 8; |
| } |
| |
| void AppendFloat(float value) { |
| jvalue jv; |
| jv.f = value; |
| Append(jv.i); |
| } |
| |
| void AppendDouble(double value) { |
| jvalue jv; |
| jv.d = value; |
| AppendWide(jv.j); |
| } |
| |
| void BuildArgArrayFromVarArgs(const ScopedObjectAccessAlreadyRunnable& soa, |
| ObjPtr<mirror::Object> receiver, |
| va_list ap) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| // Set receiver if non-null (method is not static) |
| if (receiver != nullptr) { |
| Append(receiver); |
| } |
| for (size_t i = 1; i < shorty_len_; ++i) { |
| switch (shorty_[i]) { |
| case 'Z': |
| case 'B': |
| case 'C': |
| case 'S': |
| case 'I': |
| Append(va_arg(ap, jint)); |
| break; |
| case 'F': |
| AppendFloat(va_arg(ap, jdouble)); |
| break; |
| case 'L': |
| Append(soa.Decode<mirror::Object>(va_arg(ap, jobject))); |
| break; |
| case 'D': |
| AppendDouble(va_arg(ap, jdouble)); |
| break; |
| case 'J': |
| AppendWide(va_arg(ap, jlong)); |
| break; |
| #ifndef NDEBUG |
| default: |
| LOG(FATAL) << "Unexpected shorty character: " << shorty_[i]; |
| #endif |
| } |
| } |
| } |
| |
| void BuildArgArrayFromJValues(const ScopedObjectAccessAlreadyRunnable& soa, |
| ObjPtr<mirror::Object> receiver, jvalue* args) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| // Set receiver if non-null (method is not static) |
| if (receiver != nullptr) { |
| Append(receiver); |
| } |
| for (size_t i = 1, args_offset = 0; i < shorty_len_; ++i, ++args_offset) { |
| switch (shorty_[i]) { |
| case 'Z': |
| Append(args[args_offset].z); |
| break; |
| case 'B': |
| Append(args[args_offset].b); |
| break; |
| case 'C': |
| Append(args[args_offset].c); |
| break; |
| case 'S': |
| Append(args[args_offset].s); |
| break; |
| case 'I': |
| case 'F': |
| Append(args[args_offset].i); |
| break; |
| case 'L': |
| Append(soa.Decode<mirror::Object>(args[args_offset].l)); |
| break; |
| case 'D': |
| case 'J': |
| AppendWide(args[args_offset].j); |
| break; |
| #ifndef NDEBUG |
| default: |
| LOG(FATAL) << "Unexpected shorty character: " << shorty_[i]; |
| #endif |
| } |
| } |
| } |
| |
| void BuildArgArrayFromFrame(ShadowFrame* shadow_frame, uint32_t arg_offset) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| // Set receiver if non-null (method is not static) |
| size_t cur_arg = arg_offset; |
| if (!shadow_frame->GetMethod()->IsStatic()) { |
| Append(shadow_frame->GetVReg(cur_arg)); |
| cur_arg++; |
| } |
| for (size_t i = 1; i < shorty_len_; ++i) { |
| switch (shorty_[i]) { |
| case 'Z': |
| case 'B': |
| case 'C': |
| case 'S': |
| case 'I': |
| case 'F': |
| case 'L': |
| Append(shadow_frame->GetVReg(cur_arg)); |
| cur_arg++; |
| break; |
| case 'D': |
| case 'J': |
| AppendWide(shadow_frame->GetVRegLong(cur_arg)); |
| cur_arg++; |
| cur_arg++; |
| break; |
| #ifndef NDEBUG |
| default: |
| LOG(FATAL) << "Unexpected shorty character: " << shorty_[i]; |
| #endif |
| } |
| } |
| } |
| |
| static void ThrowIllegalPrimitiveArgumentException(const char* expected, |
| const char* found_descriptor) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| ThrowIllegalArgumentException( |
| StringPrintf("Invalid primitive conversion from %s to %s", expected, |
| PrettyDescriptor(found_descriptor).c_str()).c_str()); |
| } |
| |
| bool BuildArgArrayFromObjectArray(ObjPtr<mirror::Object> receiver, |
| ObjPtr<mirror::ObjectArray<mirror::Object>> args, |
| ArtMethod* m) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| const DexFile::TypeList* classes = m->GetParameterTypeList(); |
| // Set receiver if non-null (method is not static) |
| if (receiver != nullptr) { |
| Append(receiver); |
| } |
| for (size_t i = 1, args_offset = 0; i < shorty_len_; ++i, ++args_offset) { |
| ObjPtr<mirror::Object> arg(args->Get(args_offset)); |
| if (((shorty_[i] == 'L') && (arg != nullptr)) || ((arg == nullptr && shorty_[i] != 'L'))) { |
| PointerSize pointer_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize(); |
| ObjPtr<mirror::Class> dst_class( |
| m->GetClassFromTypeIndex(classes->GetTypeItem(args_offset).type_idx_, |
| true /* resolve */, |
| pointer_size)); |
| if (UNLIKELY(arg == nullptr || !arg->InstanceOf(dst_class))) { |
| ThrowIllegalArgumentException( |
| StringPrintf("method %s argument %zd has type %s, got %s", |
| m->PrettyMethod(false).c_str(), |
| args_offset + 1, // Humans don't count from 0. |
| mirror::Class::PrettyDescriptor(dst_class).c_str(), |
| mirror::Object::PrettyTypeOf(arg).c_str()).c_str()); |
| return false; |
| } |
| } |
| |
| #define DO_FIRST_ARG(match_descriptor, get_fn, append) { \ |
| if (LIKELY(arg != nullptr && arg->GetClass()->DescriptorEquals(match_descriptor))) { \ |
| ArtField* primitive_field = arg->GetClass()->GetInstanceField(0); \ |
| append(primitive_field-> get_fn(arg)); |
| |
| #define DO_ARG(match_descriptor, get_fn, append) \ |
| } else if (LIKELY(arg != nullptr && \ |
| arg->GetClass<>()->DescriptorEquals(match_descriptor))) { \ |
| ArtField* primitive_field = arg->GetClass()->GetInstanceField(0); \ |
| append(primitive_field-> get_fn(arg)); |
| |
| #define DO_FAIL(expected) \ |
| } else { \ |
| if (arg->GetClass<>()->IsPrimitive()) { \ |
| std::string temp; \ |
| ThrowIllegalPrimitiveArgumentException(expected, \ |
| arg->GetClass<>()->GetDescriptor(&temp)); \ |
| } else { \ |
| ThrowIllegalArgumentException(\ |
| StringPrintf("method %s argument %zd has type %s, got %s", \ |
| ArtMethod::PrettyMethod(m, false).c_str(), \ |
| args_offset + 1, \ |
| expected, \ |
| mirror::Object::PrettyTypeOf(arg).c_str()).c_str()); \ |
| } \ |
| return false; \ |
| } } |
| |
| switch (shorty_[i]) { |
| case 'L': |
| Append(arg); |
| break; |
| case 'Z': |
| DO_FIRST_ARG("Ljava/lang/Boolean;", GetBoolean, Append) |
| DO_FAIL("boolean") |
| break; |
| case 'B': |
| DO_FIRST_ARG("Ljava/lang/Byte;", GetByte, Append) |
| DO_FAIL("byte") |
| break; |
| case 'C': |
| DO_FIRST_ARG("Ljava/lang/Character;", GetChar, Append) |
| DO_FAIL("char") |
| break; |
| case 'S': |
| DO_FIRST_ARG("Ljava/lang/Short;", GetShort, Append) |
| DO_ARG("Ljava/lang/Byte;", GetByte, Append) |
| DO_FAIL("short") |
| break; |
| case 'I': |
| DO_FIRST_ARG("Ljava/lang/Integer;", GetInt, Append) |
| DO_ARG("Ljava/lang/Character;", GetChar, Append) |
| DO_ARG("Ljava/lang/Short;", GetShort, Append) |
| DO_ARG("Ljava/lang/Byte;", GetByte, Append) |
| DO_FAIL("int") |
| break; |
| case 'J': |
| DO_FIRST_ARG("Ljava/lang/Long;", GetLong, AppendWide) |
| DO_ARG("Ljava/lang/Integer;", GetInt, AppendWide) |
| DO_ARG("Ljava/lang/Character;", GetChar, AppendWide) |
| DO_ARG("Ljava/lang/Short;", GetShort, AppendWide) |
| DO_ARG("Ljava/lang/Byte;", GetByte, AppendWide) |
| DO_FAIL("long") |
| break; |
| case 'F': |
| DO_FIRST_ARG("Ljava/lang/Float;", GetFloat, AppendFloat) |
| DO_ARG("Ljava/lang/Long;", GetLong, AppendFloat) |
| DO_ARG("Ljava/lang/Integer;", GetInt, AppendFloat) |
| DO_ARG("Ljava/lang/Character;", GetChar, AppendFloat) |
| DO_ARG("Ljava/lang/Short;", GetShort, AppendFloat) |
| DO_ARG("Ljava/lang/Byte;", GetByte, AppendFloat) |
| DO_FAIL("float") |
| break; |
| case 'D': |
| DO_FIRST_ARG("Ljava/lang/Double;", GetDouble, AppendDouble) |
| DO_ARG("Ljava/lang/Float;", GetFloat, AppendDouble) |
| DO_ARG("Ljava/lang/Long;", GetLong, AppendDouble) |
| DO_ARG("Ljava/lang/Integer;", GetInt, AppendDouble) |
| DO_ARG("Ljava/lang/Character;", GetChar, AppendDouble) |
| DO_ARG("Ljava/lang/Short;", GetShort, AppendDouble) |
| DO_ARG("Ljava/lang/Byte;", GetByte, AppendDouble) |
| DO_FAIL("double") |
| break; |
| #ifndef NDEBUG |
| default: |
| LOG(FATAL) << "Unexpected shorty character: " << shorty_[i]; |
| UNREACHABLE(); |
| #endif |
| } |
| #undef DO_FIRST_ARG |
| #undef DO_ARG |
| #undef DO_FAIL |
| } |
| return true; |
| } |
| |
| private: |
| enum { kSmallArgArraySize = 16 }; |
| const char* const shorty_; |
| const uint32_t shorty_len_; |
| uint32_t num_bytes_; |
| uint32_t* arg_array_; |
| uint32_t small_arg_array_[kSmallArgArraySize]; |
| std::unique_ptr<uint32_t[]> large_arg_array_; |
| }; |
| |
| static void CheckMethodArguments(JavaVMExt* vm, ArtMethod* m, uint32_t* args) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| const DexFile::TypeList* params = m->GetParameterTypeList(); |
| if (params == nullptr) { |
| return; // No arguments so nothing to check. |
| } |
| uint32_t offset = 0; |
| uint32_t num_params = params->Size(); |
| size_t error_count = 0; |
| if (!m->IsStatic()) { |
| offset = 1; |
| } |
| // TODO: If args contain object references, it may cause problems. |
| Thread* const self = Thread::Current(); |
| PointerSize pointer_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize(); |
| for (uint32_t i = 0; i < num_params; i++) { |
| uint16_t type_idx = params->GetTypeItem(i).type_idx_; |
| ObjPtr<mirror::Class> param_type(m->GetClassFromTypeIndex(type_idx, |
| true /* resolve*/, |
| pointer_size)); |
| if (param_type == nullptr) { |
| CHECK(self->IsExceptionPending()); |
| LOG(ERROR) << "Internal error: unresolvable type for argument type in JNI invoke: " |
| << m->GetTypeDescriptorFromTypeIdx(type_idx) << "\n" |
| << self->GetException()->Dump(); |
| self->ClearException(); |
| ++error_count; |
| } else if (!param_type->IsPrimitive()) { |
| // TODO: There is a compaction bug here since GetClassFromTypeIdx can cause thread suspension, |
| // this is a hard to fix problem since the args can contain Object*, we need to save and |
| // restore them by using a visitor similar to the ones used in the trampoline entrypoints. |
| ObjPtr<mirror::Object> argument = |
| (reinterpret_cast<StackReference<mirror::Object>*>(&args[i + offset]))->AsMirrorPtr(); |
| if (argument != nullptr && !argument->InstanceOf(param_type)) { |
| LOG(ERROR) << "JNI ERROR (app bug): attempt to pass an instance of " |
| << argument->PrettyTypeOf() << " as argument " << (i + 1) |
| << " to " << m->PrettyMethod(); |
| ++error_count; |
| } |
| } else if (param_type->IsPrimitiveLong() || param_type->IsPrimitiveDouble()) { |
| offset++; |
| } else { |
| int32_t arg = static_cast<int32_t>(args[i + offset]); |
| if (param_type->IsPrimitiveBoolean()) { |
| if (arg != JNI_TRUE && arg != JNI_FALSE) { |
| LOG(ERROR) << "JNI ERROR (app bug): expected jboolean (0/1) but got value of " |
| << arg << " as argument " << (i + 1) << " to " << m->PrettyMethod(); |
| ++error_count; |
| } |
| } else if (param_type->IsPrimitiveByte()) { |
| if (arg < -128 || arg > 127) { |
| LOG(ERROR) << "JNI ERROR (app bug): expected jbyte but got value of " |
| << arg << " as argument " << (i + 1) << " to " << m->PrettyMethod(); |
| ++error_count; |
| } |
| } else if (param_type->IsPrimitiveChar()) { |
| if (args[i + offset] > 0xFFFF) { |
| LOG(ERROR) << "JNI ERROR (app bug): expected jchar but got value of " |
| << arg << " as argument " << (i + 1) << " to " << m->PrettyMethod(); |
| ++error_count; |
| } |
| } else if (param_type->IsPrimitiveShort()) { |
| if (arg < -32768 || arg > 0x7FFF) { |
| LOG(ERROR) << "JNI ERROR (app bug): expected jshort but got value of " |
| << arg << " as argument " << (i + 1) << " to " << m->PrettyMethod(); |
| ++error_count; |
| } |
| } |
| } |
| } |
| if (UNLIKELY(error_count > 0)) { |
| // TODO: pass the JNI function name (such as "CallVoidMethodV") through so we can call JniAbort |
| // with an argument. |
| vm->JniAbortF(nullptr, "bad arguments passed to %s (see above for details)", |
| m->PrettyMethod().c_str()); |
| } |
| } |
| |
| static ArtMethod* FindVirtualMethod(ObjPtr<mirror::Object> receiver, ArtMethod* method) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| return receiver->GetClass()->FindVirtualMethodForVirtualOrInterface(method, kRuntimePointerSize); |
| } |
| |
| |
| static void InvokeWithArgArray(const ScopedObjectAccessAlreadyRunnable& soa, |
| ArtMethod* method, ArgArray* arg_array, JValue* result, |
| const char* shorty) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| uint32_t* args = arg_array->GetArray(); |
| if (UNLIKELY(soa.Env()->check_jni)) { |
| CheckMethodArguments(soa.Vm(), method->GetInterfaceMethodIfProxy(kRuntimePointerSize), args); |
| } |
| method->Invoke(soa.Self(), args, arg_array->GetNumBytes(), result, shorty); |
| } |
| |
| JValue InvokeWithVarArgs(const ScopedObjectAccessAlreadyRunnable& soa, jobject obj, jmethodID mid, |
| va_list args) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| // We want to make sure that the stack is not within a small distance from the |
| // protected region in case we are calling into a leaf function whose stack |
| // check has been elided. |
| if (UNLIKELY(__builtin_frame_address(0) < soa.Self()->GetStackEnd())) { |
| ThrowStackOverflowError(soa.Self()); |
| return JValue(); |
| } |
| |
| ArtMethod* method = soa.DecodeMethod(mid); |
| bool is_string_init = method->GetDeclaringClass()->IsStringClass() && method->IsConstructor(); |
| if (is_string_init) { |
| // Replace calls to String.<init> with equivalent StringFactory call. |
| method = WellKnownClasses::StringInitToStringFactory(method); |
| } |
| ObjPtr<mirror::Object> receiver = method->IsStatic() ? nullptr : soa.Decode<mirror::Object>(obj); |
| uint32_t shorty_len = 0; |
| const char* shorty = |
| method->GetInterfaceMethodIfProxy(kRuntimePointerSize)->GetShorty(&shorty_len); |
| JValue result; |
| ArgArray arg_array(shorty, shorty_len); |
| arg_array.BuildArgArrayFromVarArgs(soa, receiver, args); |
| InvokeWithArgArray(soa, method, &arg_array, &result, shorty); |
| if (is_string_init) { |
| // For string init, remap original receiver to StringFactory result. |
| UpdateReference(soa.Self(), obj, result.GetL()); |
| } |
| return result; |
| } |
| |
| JValue InvokeWithJValues(const ScopedObjectAccessAlreadyRunnable& soa, jobject obj, jmethodID mid, |
| jvalue* args) { |
| // We want to make sure that the stack is not within a small distance from the |
| // protected region in case we are calling into a leaf function whose stack |
| // check has been elided. |
| if (UNLIKELY(__builtin_frame_address(0) < soa.Self()->GetStackEnd())) { |
| ThrowStackOverflowError(soa.Self()); |
| return JValue(); |
| } |
| |
| ArtMethod* method = soa.DecodeMethod(mid); |
| bool is_string_init = method->GetDeclaringClass()->IsStringClass() && method->IsConstructor(); |
| if (is_string_init) { |
| // Replace calls to String.<init> with equivalent StringFactory call. |
| method = WellKnownClasses::StringInitToStringFactory(method); |
| } |
| ObjPtr<mirror::Object> receiver = method->IsStatic() ? nullptr : soa.Decode<mirror::Object>(obj); |
| uint32_t shorty_len = 0; |
| const char* shorty = |
| method->GetInterfaceMethodIfProxy(kRuntimePointerSize)->GetShorty(&shorty_len); |
| JValue result; |
| ArgArray arg_array(shorty, shorty_len); |
| arg_array.BuildArgArrayFromJValues(soa, receiver, args); |
| InvokeWithArgArray(soa, method, &arg_array, &result, shorty); |
| if (is_string_init) { |
| // For string init, remap original receiver to StringFactory result. |
| UpdateReference(soa.Self(), obj, result.GetL()); |
| } |
| return result; |
| } |
| |
| JValue InvokeVirtualOrInterfaceWithJValues(const ScopedObjectAccessAlreadyRunnable& soa, |
| jobject obj, jmethodID mid, jvalue* args) { |
| // We want to make sure that the stack is not within a small distance from the |
| // protected region in case we are calling into a leaf function whose stack |
| // check has been elided. |
| if (UNLIKELY(__builtin_frame_address(0) < soa.Self()->GetStackEnd())) { |
| ThrowStackOverflowError(soa.Self()); |
| return JValue(); |
| } |
| |
| ObjPtr<mirror::Object> receiver = soa.Decode<mirror::Object>(obj); |
| ArtMethod* method = FindVirtualMethod(receiver, soa.DecodeMethod(mid)); |
| bool is_string_init = method->GetDeclaringClass()->IsStringClass() && method->IsConstructor(); |
| if (is_string_init) { |
| // Replace calls to String.<init> with equivalent StringFactory call. |
| method = WellKnownClasses::StringInitToStringFactory(method); |
| receiver = nullptr; |
| } |
| uint32_t shorty_len = 0; |
| const char* shorty = |
| method->GetInterfaceMethodIfProxy(kRuntimePointerSize)->GetShorty(&shorty_len); |
| JValue result; |
| ArgArray arg_array(shorty, shorty_len); |
| arg_array.BuildArgArrayFromJValues(soa, receiver, args); |
| InvokeWithArgArray(soa, method, &arg_array, &result, shorty); |
| if (is_string_init) { |
| // For string init, remap original receiver to StringFactory result. |
| UpdateReference(soa.Self(), obj, result.GetL()); |
| } |
| return result; |
| } |
| |
| JValue InvokeVirtualOrInterfaceWithVarArgs(const ScopedObjectAccessAlreadyRunnable& soa, |
| jobject obj, jmethodID mid, va_list args) { |
| // We want to make sure that the stack is not within a small distance from the |
| // protected region in case we are calling into a leaf function whose stack |
| // check has been elided. |
| if (UNLIKELY(__builtin_frame_address(0) < soa.Self()->GetStackEnd())) { |
| ThrowStackOverflowError(soa.Self()); |
| return JValue(); |
| } |
| |
| ObjPtr<mirror::Object> receiver = soa.Decode<mirror::Object>(obj); |
| ArtMethod* method = FindVirtualMethod(receiver, soa.DecodeMethod(mid)); |
| bool is_string_init = method->GetDeclaringClass()->IsStringClass() && method->IsConstructor(); |
| if (is_string_init) { |
| // Replace calls to String.<init> with equivalent StringFactory call. |
| method = WellKnownClasses::StringInitToStringFactory(method); |
| receiver = nullptr; |
| } |
| uint32_t shorty_len = 0; |
| const char* shorty = |
| method->GetInterfaceMethodIfProxy(kRuntimePointerSize)->GetShorty(&shorty_len); |
| JValue result; |
| ArgArray arg_array(shorty, shorty_len); |
| arg_array.BuildArgArrayFromVarArgs(soa, receiver, args); |
| InvokeWithArgArray(soa, method, &arg_array, &result, shorty); |
| if (is_string_init) { |
| // For string init, remap original receiver to StringFactory result. |
| UpdateReference(soa.Self(), obj, result.GetL()); |
| } |
| return result; |
| } |
| |
| jobject InvokeMethod(const ScopedObjectAccessAlreadyRunnable& soa, jobject javaMethod, |
| jobject javaReceiver, jobject javaArgs, size_t num_frames) { |
| // We want to make sure that the stack is not within a small distance from the |
| // protected region in case we are calling into a leaf function whose stack |
| // check has been elided. |
| if (UNLIKELY(__builtin_frame_address(0) < |
| soa.Self()->GetStackEndForInterpreter(true))) { |
| ThrowStackOverflowError(soa.Self()); |
| return nullptr; |
| } |
| |
| ObjPtr<mirror::Executable> executable = soa.Decode<mirror::Executable>(javaMethod); |
| const bool accessible = executable->IsAccessible(); |
| ArtMethod* m = executable->GetArtMethod(); |
| |
| ObjPtr<mirror::Class> declaring_class = m->GetDeclaringClass(); |
| if (UNLIKELY(!declaring_class->IsInitialized())) { |
| StackHandleScope<1> hs(soa.Self()); |
| HandleWrapperObjPtr<mirror::Class> h_class(hs.NewHandleWrapper(&declaring_class)); |
| if (!Runtime::Current()->GetClassLinker()->EnsureInitialized(soa.Self(), h_class, true, true)) { |
| return nullptr; |
| } |
| } |
| |
| ObjPtr<mirror::Object> receiver; |
| if (!m->IsStatic()) { |
| // Replace calls to String.<init> with equivalent StringFactory call. |
| if (declaring_class->IsStringClass() && m->IsConstructor()) { |
| m = WellKnownClasses::StringInitToStringFactory(m); |
| CHECK(javaReceiver == nullptr); |
| } else { |
| // Check that the receiver is non-null and an instance of the field's declaring class. |
| receiver = soa.Decode<mirror::Object>(javaReceiver); |
| if (!VerifyObjectIsClass(receiver, declaring_class)) { |
| return nullptr; |
| } |
| |
| // Find the actual implementation of the virtual method. |
| m = receiver->GetClass()->FindVirtualMethodForVirtualOrInterface(m, kRuntimePointerSize); |
| } |
| } |
| |
| // Get our arrays of arguments and their types, and check they're the same size. |
| ObjPtr<mirror::ObjectArray<mirror::Object>> objects = |
| soa.Decode<mirror::ObjectArray<mirror::Object>>(javaArgs); |
| auto* np_method = m->GetInterfaceMethodIfProxy(kRuntimePointerSize); |
| const DexFile::TypeList* classes = np_method->GetParameterTypeList(); |
| uint32_t classes_size = (classes == nullptr) ? 0 : classes->Size(); |
| uint32_t arg_count = (objects != nullptr) ? objects->GetLength() : 0; |
| if (arg_count != classes_size) { |
| ThrowIllegalArgumentException(StringPrintf("Wrong number of arguments; expected %d, got %d", |
| classes_size, arg_count).c_str()); |
| return nullptr; |
| } |
| |
| // If method is not set to be accessible, verify it can be accessed by the caller. |
| ObjPtr<mirror::Class> calling_class; |
| if (!accessible && !VerifyAccess(soa.Self(), |
| receiver, |
| declaring_class, |
| m->GetAccessFlags(), |
| &calling_class, |
| num_frames)) { |
| ThrowIllegalAccessException( |
| StringPrintf("Class %s cannot access %s method %s of class %s", |
| calling_class == nullptr ? "null" : calling_class->PrettyClass().c_str(), |
| PrettyJavaAccessFlags(m->GetAccessFlags()).c_str(), |
| m->PrettyMethod().c_str(), |
| m->GetDeclaringClass() == nullptr ? "null" : |
| m->GetDeclaringClass()->PrettyClass().c_str()).c_str()); |
| return nullptr; |
| } |
| |
| // Invoke the method. |
| JValue result; |
| uint32_t shorty_len = 0; |
| const char* shorty = np_method->GetShorty(&shorty_len); |
| ArgArray arg_array(shorty, shorty_len); |
| if (!arg_array.BuildArgArrayFromObjectArray(receiver, objects, np_method)) { |
| CHECK(soa.Self()->IsExceptionPending()); |
| return nullptr; |
| } |
| |
| InvokeWithArgArray(soa, m, &arg_array, &result, shorty); |
| |
| // Wrap any exception with "Ljava/lang/reflect/InvocationTargetException;" and return early. |
| if (soa.Self()->IsExceptionPending()) { |
| // If we get another exception when we are trying to wrap, then just use that instead. |
| jthrowable th = soa.Env()->ExceptionOccurred(); |
| soa.Self()->ClearException(); |
| jclass exception_class = soa.Env()->FindClass("java/lang/reflect/InvocationTargetException"); |
| if (exception_class == nullptr) { |
| soa.Self()->AssertPendingOOMException(); |
| return nullptr; |
| } |
| jmethodID mid = soa.Env()->GetMethodID(exception_class, "<init>", "(Ljava/lang/Throwable;)V"); |
| CHECK(mid != nullptr); |
| jobject exception_instance = soa.Env()->NewObject(exception_class, mid, th); |
| if (exception_instance == nullptr) { |
| soa.Self()->AssertPendingOOMException(); |
| return nullptr; |
| } |
| soa.Env()->Throw(reinterpret_cast<jthrowable>(exception_instance)); |
| return nullptr; |
| } |
| |
| // Box if necessary and return. |
| return soa.AddLocalReference<jobject>(BoxPrimitive(Primitive::GetType(shorty[0]), result)); |
| } |
| |
| ObjPtr<mirror::Object> BoxPrimitive(Primitive::Type src_class, const JValue& value) { |
| if (src_class == Primitive::kPrimNot) { |
| return MakeObjPtr(value.GetL()); |
| } |
| if (src_class == Primitive::kPrimVoid) { |
| // There's no such thing as a void field, and void methods invoked via reflection return null. |
| return nullptr; |
| } |
| |
| jmethodID m = nullptr; |
| const char* shorty; |
| switch (src_class) { |
| case Primitive::kPrimBoolean: |
| m = WellKnownClasses::java_lang_Boolean_valueOf; |
| shorty = "LZ"; |
| break; |
| case Primitive::kPrimByte: |
| m = WellKnownClasses::java_lang_Byte_valueOf; |
| shorty = "LB"; |
| break; |
| case Primitive::kPrimChar: |
| m = WellKnownClasses::java_lang_Character_valueOf; |
| shorty = "LC"; |
| break; |
| case Primitive::kPrimDouble: |
| m = WellKnownClasses::java_lang_Double_valueOf; |
| shorty = "LD"; |
| break; |
| case Primitive::kPrimFloat: |
| m = WellKnownClasses::java_lang_Float_valueOf; |
| shorty = "LF"; |
| break; |
| case Primitive::kPrimInt: |
| m = WellKnownClasses::java_lang_Integer_valueOf; |
| shorty = "LI"; |
| break; |
| case Primitive::kPrimLong: |
| m = WellKnownClasses::java_lang_Long_valueOf; |
| shorty = "LJ"; |
| break; |
| case Primitive::kPrimShort: |
| m = WellKnownClasses::java_lang_Short_valueOf; |
| shorty = "LS"; |
| break; |
| default: |
| LOG(FATAL) << static_cast<int>(src_class); |
| shorty = nullptr; |
| } |
| |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| DCHECK_EQ(soa.Self()->GetState(), kRunnable); |
| |
| ArgArray arg_array(shorty, 2); |
| JValue result; |
| if (src_class == Primitive::kPrimDouble || src_class == Primitive::kPrimLong) { |
| arg_array.AppendWide(value.GetJ()); |
| } else { |
| arg_array.Append(value.GetI()); |
| } |
| |
| soa.DecodeMethod(m)->Invoke(soa.Self(), arg_array.GetArray(), arg_array.GetNumBytes(), |
| &result, shorty); |
| return result.GetL(); |
| } |
| |
| static std::string UnboxingFailureKind(ArtField* f) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| if (f != nullptr) { |
| return "field " + f->PrettyField(false); |
| } |
| return "result"; |
| } |
| |
| static bool UnboxPrimitive(ObjPtr<mirror::Object> o, |
| ObjPtr<mirror::Class> dst_class, |
| ArtField* f, |
| JValue* unboxed_value) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| bool unbox_for_result = (f == nullptr); |
| if (!dst_class->IsPrimitive()) { |
| if (UNLIKELY(o != nullptr && !o->InstanceOf(dst_class))) { |
| if (!unbox_for_result) { |
| ThrowIllegalArgumentException( |
| StringPrintf("%s has type %s, got %s", |
| UnboxingFailureKind(f).c_str(), |
| dst_class->PrettyDescriptor().c_str(), |
| o->PrettyTypeOf().c_str()).c_str()); |
| } else { |
| ThrowClassCastException( |
| StringPrintf("Couldn't convert result of type %s to %s", |
| o->PrettyTypeOf().c_str(), |
| dst_class->PrettyDescriptor().c_str()).c_str()); |
| } |
| return false; |
| } |
| unboxed_value->SetL(o); |
| return true; |
| } |
| if (UNLIKELY(dst_class->GetPrimitiveType() == Primitive::kPrimVoid)) { |
| ThrowIllegalArgumentException(StringPrintf("Can't unbox %s to void", |
| UnboxingFailureKind(f).c_str()).c_str()); |
| return false; |
| } |
| if (UNLIKELY(o == nullptr)) { |
| if (!unbox_for_result) { |
| ThrowIllegalArgumentException( |
| StringPrintf("%s has type %s, got null", |
| UnboxingFailureKind(f).c_str(), |
| dst_class->PrettyDescriptor().c_str()).c_str()); |
| } else { |
| ThrowNullPointerException( |
| StringPrintf("Expected to unbox a '%s' primitive type but was returned null", |
| dst_class->PrettyDescriptor().c_str()).c_str()); |
| } |
| return false; |
| } |
| |
| JValue boxed_value; |
| ObjPtr<mirror::Class> klass = o->GetClass(); |
| ObjPtr<mirror::Class> src_class = nullptr; |
| ClassLinker* const class_linker = Runtime::Current()->GetClassLinker(); |
| ArtField* primitive_field = &klass->GetIFieldsPtr()->At(0); |
| if (klass->DescriptorEquals("Ljava/lang/Boolean;")) { |
| src_class = class_linker->FindPrimitiveClass('Z'); |
| boxed_value.SetZ(primitive_field->GetBoolean(o)); |
| } else if (klass->DescriptorEquals("Ljava/lang/Byte;")) { |
| src_class = class_linker->FindPrimitiveClass('B'); |
| boxed_value.SetB(primitive_field->GetByte(o)); |
| } else if (klass->DescriptorEquals("Ljava/lang/Character;")) { |
| src_class = class_linker->FindPrimitiveClass('C'); |
| boxed_value.SetC(primitive_field->GetChar(o)); |
| } else if (klass->DescriptorEquals("Ljava/lang/Float;")) { |
| src_class = class_linker->FindPrimitiveClass('F'); |
| boxed_value.SetF(primitive_field->GetFloat(o)); |
| } else if (klass->DescriptorEquals("Ljava/lang/Double;")) { |
| src_class = class_linker->FindPrimitiveClass('D'); |
| boxed_value.SetD(primitive_field->GetDouble(o)); |
| } else if (klass->DescriptorEquals("Ljava/lang/Integer;")) { |
| src_class = class_linker->FindPrimitiveClass('I'); |
| boxed_value.SetI(primitive_field->GetInt(o)); |
| } else if (klass->DescriptorEquals("Ljava/lang/Long;")) { |
| src_class = class_linker->FindPrimitiveClass('J'); |
| boxed_value.SetJ(primitive_field->GetLong(o)); |
| } else if (klass->DescriptorEquals("Ljava/lang/Short;")) { |
| src_class = class_linker->FindPrimitiveClass('S'); |
| boxed_value.SetS(primitive_field->GetShort(o)); |
| } else { |
| std::string temp; |
| ThrowIllegalArgumentException( |
| StringPrintf("%s has type %s, got %s", UnboxingFailureKind(f).c_str(), |
| dst_class->PrettyDescriptor().c_str(), |
| PrettyDescriptor(o->GetClass()->GetDescriptor(&temp)).c_str()).c_str()); |
| return false; |
| } |
| |
| return ConvertPrimitiveValue(unbox_for_result, |
| src_class->GetPrimitiveType(), dst_class->GetPrimitiveType(), |
| boxed_value, unboxed_value); |
| } |
| |
| bool UnboxPrimitiveForField(ObjPtr<mirror::Object> o, |
| ObjPtr<mirror::Class> dst_class, |
| ArtField* f, |
| JValue* unboxed_value) { |
| DCHECK(f != nullptr); |
| return UnboxPrimitive(o, dst_class, f, unboxed_value); |
| } |
| |
| bool UnboxPrimitiveForResult(ObjPtr<mirror::Object> o, |
| ObjPtr<mirror::Class> dst_class, |
| JValue* unboxed_value) { |
| return UnboxPrimitive(o, dst_class, nullptr, unboxed_value); |
| } |
| |
| ObjPtr<mirror::Class> GetCallingClass(Thread* self, size_t num_frames) { |
| NthCallerVisitor visitor(self, num_frames); |
| visitor.WalkStack(); |
| return visitor.caller != nullptr ? visitor.caller->GetDeclaringClass() : nullptr; |
| } |
| |
| bool VerifyAccess(Thread* self, |
| ObjPtr<mirror::Object> obj, |
| ObjPtr<mirror::Class> declaring_class, |
| uint32_t access_flags, |
| ObjPtr<mirror::Class>* calling_class, |
| size_t num_frames) { |
| if ((access_flags & kAccPublic) != 0) { |
| return true; |
| } |
| ObjPtr<mirror::Class> klass = GetCallingClass(self, num_frames); |
| if (UNLIKELY(klass == nullptr)) { |
| // The caller is an attached native thread. |
| return false; |
| } |
| *calling_class = klass; |
| return VerifyAccess(obj, declaring_class, access_flags, klass); |
| } |
| |
| bool VerifyAccess(ObjPtr<mirror::Object> obj, |
| ObjPtr<mirror::Class> declaring_class, |
| uint32_t access_flags, |
| ObjPtr<mirror::Class> calling_class) { |
| if (calling_class == declaring_class) { |
| return true; |
| } |
| ScopedAssertNoThreadSuspension sants("verify-access"); |
| if ((access_flags & kAccPrivate) != 0) { |
| return false; |
| } |
| if ((access_flags & kAccProtected) != 0) { |
| if (obj != nullptr && !obj->InstanceOf(calling_class) && |
| !declaring_class->IsInSamePackage(calling_class)) { |
| return false; |
| } else if (declaring_class->IsAssignableFrom(calling_class)) { |
| return true; |
| } |
| } |
| return declaring_class->IsInSamePackage(calling_class); |
| } |
| |
| void InvalidReceiverError(ObjPtr<mirror::Object> o, ObjPtr<mirror::Class> c) { |
| std::string expected_class_name(mirror::Class::PrettyDescriptor(c)); |
| std::string actual_class_name(mirror::Object::PrettyTypeOf(o)); |
| ThrowIllegalArgumentException(StringPrintf("Expected receiver of type %s, but got %s", |
| expected_class_name.c_str(), |
| actual_class_name.c_str()).c_str()); |
| } |
| |
| // This only works if there's one reference which points to the object in obj. |
| // Will need to be fixed if there's cases where it's not. |
| void UpdateReference(Thread* self, jobject obj, ObjPtr<mirror::Object> result) { |
| IndirectRef ref = reinterpret_cast<IndirectRef>(obj); |
| IndirectRefKind kind = IndirectReferenceTable::GetIndirectRefKind(ref); |
| if (kind == kLocal) { |
| self->GetJniEnv()->locals.Update(obj, result); |
| } else if (kind == kHandleScopeOrInvalid) { |
| LOG(FATAL) << "Unsupported UpdateReference for kind kHandleScopeOrInvalid"; |
| } else if (kind == kGlobal) { |
| self->GetJniEnv()->vm->UpdateGlobal(self, ref, result); |
| } else { |
| DCHECK_EQ(kind, kWeakGlobal); |
| self->GetJniEnv()->vm->UpdateWeakGlobal(self, ref, result); |
| } |
| } |
| |
| } // namespace art |