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// Copyright 2012 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_IC_INL_H_
#define V8_IC_INL_H_
#include "src/ic/ic.h"
#include "src/debug/debug.h"
#include "src/macro-assembler.h"
#include "src/prototype.h"
namespace v8 {
namespace internal {
Address IC::address() const {
// Get the address of the call.
return Assembler::target_address_from_return_address(pc());
}
Address IC::constant_pool() const {
if (FLAG_enable_embedded_constant_pool) {
return raw_constant_pool();
} else {
return NULL;
}
}
Address IC::raw_constant_pool() const {
if (FLAG_enable_embedded_constant_pool) {
return *constant_pool_address_;
} else {
return NULL;
}
}
Code* IC::GetTargetAtAddress(Address address, Address constant_pool) {
// Get the target address of the IC.
Address target = Assembler::target_address_at(address, constant_pool);
// Convert target address to the code object. Code::GetCodeFromTargetAddress
// is safe for use during GC where the map might be marked.
Code* result = Code::GetCodeFromTargetAddress(target);
DCHECK(result->is_inline_cache_stub());
return result;
}
void IC::SetTargetAtAddress(Address address, Code* target,
Address constant_pool) {
if (AddressIsDeoptimizedCode(target->GetIsolate(), address)) return;
DCHECK(target->is_inline_cache_stub() || target->is_compare_ic_stub());
DCHECK(!target->is_inline_cache_stub() ||
(target->kind() != Code::LOAD_IC &&
target->kind() != Code::KEYED_LOAD_IC &&
target->kind() != Code::CALL_IC && target->kind() != Code::STORE_IC &&
target->kind() != Code::KEYED_STORE_IC));
Heap* heap = target->GetHeap();
Code* old_target = GetTargetAtAddress(address, constant_pool);
#ifdef DEBUG
// STORE_IC and KEYED_STORE_IC use Code::extra_ic_state() to mark
// ICs as language mode. The language mode of the IC must be preserved.
if (old_target->kind() == Code::STORE_IC ||
old_target->kind() == Code::KEYED_STORE_IC) {
DCHECK(StoreICState::GetLanguageMode(old_target->extra_ic_state()) ==
StoreICState::GetLanguageMode(target->extra_ic_state()));
}
#endif
Assembler::set_target_address_at(heap->isolate(), address, constant_pool,
target->instruction_start());
if (heap->gc_state() == Heap::MARK_COMPACT) {
heap->mark_compact_collector()->RecordCodeTargetPatch(address, target);
} else {
heap->incremental_marking()->RecordCodeTargetPatch(address, target);
}
PostPatching(address, target, old_target);
}
void IC::set_target(Code* code) {
SetTargetAtAddress(address(), code, constant_pool());
}
Code* IC::target() const {
return GetTargetAtAddress(address(), constant_pool());
}
bool IC::IsHandler(Object* object) {
return (object->IsSmi() && (object != nullptr)) || object->IsTuple2() ||
object->IsTuple3() || object->IsFixedArray() ||
(object->IsCode() && Code::cast(object)->is_handler());
}
Handle<Map> IC::GetHandlerCacheHolder(Handle<Map> receiver_map,
bool receiver_is_holder, Isolate* isolate,
CacheHolderFlag* flag) {
if (receiver_is_holder) {
*flag = kCacheOnReceiver;
return receiver_map;
}
Handle<JSFunction> builtin_ctor;
if (Map::GetConstructorFunction(receiver_map, isolate->native_context())
.ToHandle(&builtin_ctor)) {
*flag = kCacheOnPrototypeReceiverIsPrimitive;
return handle(HeapObject::cast(builtin_ctor->instance_prototype())->map());
}
*flag = receiver_map->is_dictionary_map()
? kCacheOnPrototypeReceiverIsDictionary
: kCacheOnPrototype;
// Callers must ensure that the prototype is non-null.
return handle(JSObject::cast(receiver_map->prototype())->map());
}
Handle<Map> IC::GetICCacheHolder(Handle<Map> map, Isolate* isolate,
CacheHolderFlag* flag) {
Handle<JSFunction> builtin_ctor;
if (Map::GetConstructorFunction(map, isolate->native_context())
.ToHandle(&builtin_ctor)) {
*flag = kCacheOnPrototype;
return handle(builtin_ctor->initial_map());
}
*flag = kCacheOnReceiver;
return map;
}
Code* IC::get_host() {
return isolate()
->inner_pointer_to_code_cache()
->GetCacheEntry(address())
->code;
}
bool IC::AddressIsDeoptimizedCode() const {
return AddressIsDeoptimizedCode(isolate(), address());
}
bool IC::AddressIsDeoptimizedCode(Isolate* isolate, Address address) {
Code* host =
isolate->inner_pointer_to_code_cache()->GetCacheEntry(address)->code;
return (host->kind() == Code::OPTIMIZED_FUNCTION &&
host->marked_for_deoptimization());
}
} // namespace internal
} // namespace v8
#endif // V8_IC_INL_H_
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