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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 "dex_instruction.h"
#include "entrypoints/entrypoint_utils-inl.h"
#include "mirror/art_method-inl.h"
#include "mirror/object-inl.h"
namespace art {
extern "C" void art_portable_throw_div_zero_from_code() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
ThrowArithmeticExceptionDivideByZero();
}
extern "C" void art_portable_throw_array_bounds_from_code(int32_t index, int32_t length)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
ThrowArrayIndexOutOfBoundsException(index, length);
}
extern "C" void art_portable_throw_no_such_method_from_code(int32_t method_idx)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
ThrowNoSuchMethodError(method_idx);
}
extern "C" void art_portable_throw_null_pointer_exception_from_code(uint32_t dex_pc)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
// TODO: remove dex_pc argument from caller.
UNUSED(dex_pc);
Thread* self = Thread::Current();
ThrowLocation throw_location = self->GetCurrentLocationForThrow();
ThrowNullPointerExceptionFromDexPC(throw_location);
}
extern "C" void art_portable_throw_stack_overflow_from_code() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
ThrowStackOverflowError(Thread::Current());
}
extern "C" void art_portable_throw_exception_from_code(mirror::Throwable* exception)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
Thread* self = Thread::Current();
ThrowLocation throw_location = self->GetCurrentLocationForThrow();
if (exception == NULL) {
ThrowNullPointerException(NULL, "throw with null exception");
} else {
self->SetException(throw_location, exception);
}
}
extern "C" void* art_portable_get_and_clear_exception(Thread* self)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
DCHECK(self->IsExceptionPending());
// TODO: make this inline.
mirror::Throwable* exception = self->GetException(NULL);
self->ClearException();
return exception;
}
extern "C" int32_t art_portable_find_catch_block_from_code(mirror::ArtMethod* current_method,
uint32_t ti_offset)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
Thread* self = Thread::Current(); // TODO: make an argument.
ThrowLocation throw_location;
mirror::Throwable* exception = self->GetException(&throw_location);
// Check for special deoptimization exception.
if (UNLIKELY(reinterpret_cast<intptr_t>(exception) == -1)) {
return -1;
}
mirror::Class* exception_type = exception->GetClass();
StackHandleScope<1> hs(self);
MethodHelper mh(hs.NewHandle(current_method));
const DexFile::CodeItem* code_item = current_method->GetCodeItem();
DCHECK_LT(ti_offset, code_item->tries_size_);
const DexFile::TryItem* try_item = DexFile::GetTryItems(*code_item, ti_offset);
int iter_index = 0;
int result = -1;
uint32_t catch_dex_pc = -1;
// Iterate over the catch handlers associated with dex_pc
for (CatchHandlerIterator it(*code_item, *try_item); it.HasNext(); it.Next()) {
uint16_t iter_type_idx = it.GetHandlerTypeIndex();
// Catch all case
if (iter_type_idx == DexFile::kDexNoIndex16) {
catch_dex_pc = it.GetHandlerAddress();
result = iter_index;
break;
}
// Does this catch exception type apply?
mirror::Class* iter_exception_type = mh.GetDexCacheResolvedType(iter_type_idx);
if (UNLIKELY(iter_exception_type == NULL)) {
// TODO: check, the verifier (class linker?) should take care of resolving all exception
// classes early.
LOG(WARNING) << "Unresolved exception class when finding catch block: "
<< current_method->GetTypeDescriptorFromTypeIdx(iter_type_idx);
} else if (iter_exception_type->IsAssignableFrom(exception_type)) {
catch_dex_pc = it.GetHandlerAddress();
result = iter_index;
break;
}
++iter_index;
}
if (result != -1) {
// Handler found.
Runtime::Current()->GetInstrumentation()->ExceptionCaughtEvent(
self, throw_location, current_method, catch_dex_pc, exception);
// If the catch block has no move-exception then clear the exception for it.
const Instruction* first_catch_instr = Instruction::At(
¤t_method->GetCodeItem()->insns_[catch_dex_pc]);
if (first_catch_instr->Opcode() != Instruction::MOVE_EXCEPTION) {
self->ClearException();
}
}
return result;
}
} // namespace art
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