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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 "art_method-inl.h"
#include "callee_save_frame.h"
#include "dex/code_item_accessors-inl.h"
#include "dex/dex_instruction-inl.h"
#include "common_throws.h"
#include "mirror/object-inl.h"
#include "nth_caller_visitor.h"
#include "thread.h"
#include "well_known_classes.h"
namespace art {
// Deliver an exception that's pending on thread helping set up a callee save frame on the way.
extern "C" NO_RETURN void artDeliverPendingExceptionFromCode(Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
ScopedQuickEntrypointChecks sqec(self);
self->QuickDeliverException();
}
extern "C" NO_RETURN uint64_t artInvokeObsoleteMethod(ArtMethod* method, Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
DCHECK(method->IsObsolete());
ScopedQuickEntrypointChecks sqec(self);
ThrowInternalError("Attempting to invoke obsolete version of '%s'.",
method->PrettyMethod().c_str());
self->QuickDeliverException();
}
// Called by generated code to throw an exception.
extern "C" NO_RETURN void artDeliverExceptionFromCode(mirror::Throwable* exception, Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
/*
* exception may be null, in which case this routine should
* throw NPE. NOTE: this is a convenience for generated code,
* which previously did the null check inline and constructed
* and threw a NPE if null. This routine responsible for setting
* exception_ in thread and delivering the exception.
*/
ScopedQuickEntrypointChecks sqec(self);
if (exception == nullptr) {
self->ThrowNewException("Ljava/lang/NullPointerException;", nullptr);
} else {
self->SetException(exception);
}
self->QuickDeliverException();
}
// Called by generated code to throw a NPE exception.
extern "C" NO_RETURN void artThrowNullPointerExceptionFromCode(Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
ScopedQuickEntrypointChecks sqec(self);
// We come from an explicit check in the generated code. This path is triggered
// only if the object is indeed null.
ThrowNullPointerExceptionFromDexPC(/* check_address= */ false, 0U);
self->QuickDeliverException();
}
// Installed by a signal handler to throw a NPE exception.
extern "C" NO_RETURN void artThrowNullPointerExceptionFromSignal(uintptr_t addr, Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
ScopedQuickEntrypointChecks sqec(self);
ThrowNullPointerExceptionFromDexPC(/* check_address= */ true, addr);
self->QuickDeliverException();
}
// Called by generated code to throw an arithmetic divide by zero exception.
extern "C" NO_RETURN void artThrowDivZeroFromCode(Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
ScopedQuickEntrypointChecks sqec(self);
ThrowArithmeticExceptionDivideByZero();
self->QuickDeliverException();
}
// Called by generated code to throw an array index out of bounds exception.
extern "C" NO_RETURN void artThrowArrayBoundsFromCode(int index, int length, Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
ScopedQuickEntrypointChecks sqec(self);
ThrowArrayIndexOutOfBoundsException(index, length);
self->QuickDeliverException();
}
// Called by generated code to throw a string index out of bounds exception.
extern "C" NO_RETURN void artThrowStringBoundsFromCode(int index, int length, Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
ScopedQuickEntrypointChecks sqec(self);
ThrowStringIndexOutOfBoundsException(index, length);
self->QuickDeliverException();
}
extern "C" NO_RETURN void artThrowStackOverflowFromCode(Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
ScopedQuickEntrypointChecks sqec(self);
ThrowStackOverflowError(self);
self->QuickDeliverException();
}
extern "C" NO_RETURN void artThrowClassCastException(mirror::Class* dest_type,
mirror::Class* src_type,
Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
ScopedQuickEntrypointChecks sqec(self);
if (dest_type == nullptr) {
// Find the target class for check cast using the bitstring check (dest_type == null).
NthCallerVisitor visitor(self, 0u);
visitor.WalkStack();
DCHECK(visitor.caller != nullptr);
uint32_t dex_pc = visitor.GetDexPc();
CodeItemDataAccessor accessor(*visitor.caller->GetDexFile(), visitor.caller->GetCodeItem());
const Instruction& check_cast = accessor.InstructionAt(dex_pc);
DCHECK_EQ(check_cast.Opcode(), Instruction::CHECK_CAST);
dex::TypeIndex type_index(check_cast.VRegB_21c());
ClassLinker* linker = Runtime::Current()->GetClassLinker();
dest_type = linker->LookupResolvedType(type_index, visitor.caller).Ptr();
CHECK(dest_type != nullptr) << "Target class should have been previously resolved: "
<< visitor.caller->GetDexFile()->PrettyType(type_index);
CHECK(!dest_type->IsAssignableFrom(src_type))
<< " " << std::hex << dest_type->PrettyDescriptor() << ";" << dest_type->Depth()
<< "/" << dest_type->GetField32(mirror::Class::StatusOffset())
<< " <: " << src_type->PrettyDescriptor() << ";" << src_type->Depth()
<< "/" << src_type->GetField32(mirror::Class::StatusOffset());
}
DCHECK(!dest_type->IsAssignableFrom(src_type));
ThrowClassCastException(dest_type, src_type);
self->QuickDeliverException();
}
extern "C" NO_RETURN void artThrowClassCastExceptionForObject(mirror::Object* obj,
mirror::Class* dest_type,
Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
DCHECK(obj != nullptr);
artThrowClassCastException(dest_type, obj->GetClass(), self);
}
extern "C" NO_RETURN void artThrowArrayStoreException(mirror::Object* array, mirror::Object* value,
Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
ScopedQuickEntrypointChecks sqec(self);
ThrowArrayStoreException(value->GetClass(), array->GetClass());
self->QuickDeliverException();
}
} // namespace art
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