2012-02-09 10:19:46 +00:00
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// Copyright 2012 the V8 project authors. All rights reserved.
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2008-07-03 15:10:15 +00:00
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef V8_IC_INL_H_
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#define V8_IC_INL_H_
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#include "ic.h"
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2012-02-09 10:19:46 +00:00
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#include "compiler.h"
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2008-07-03 15:10:15 +00:00
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#include "debug.h"
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#include "macro-assembler.h"
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2009-05-25 10:05:56 +00:00
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namespace v8 {
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namespace internal {
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2008-07-03 15:10:15 +00:00
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2011-12-05 21:54:45 +00:00
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Address IC::address() const {
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2008-07-03 15:10:15 +00:00
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// Get the address of the call.
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2012-10-18 12:21:42 +00:00
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Address result = Assembler::target_address_from_return_address(pc());
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2008-07-03 15:10:15 +00:00
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2009-04-20 16:36:13 +00:00
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#ifdef ENABLE_DEBUGGER_SUPPORT
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2012-11-16 08:38:11 +00:00
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Debug* debug = isolate()->debug();
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2008-07-03 15:10:15 +00:00
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// First check if any break points are active if not just return the address
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// of the call.
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2011-03-18 20:35:07 +00:00
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if (!debug->has_break_points()) return result;
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2008-07-03 15:10:15 +00:00
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// At least one break point is active perform additional test to ensure that
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// break point locations are updated correctly.
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2011-03-18 20:35:07 +00:00
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if (debug->IsDebugBreak(Assembler::target_address_at(result))) {
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// If the call site is a call to debug break then return the address in
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// the original code instead of the address in the running code. This will
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// cause the original code to be updated and keeps the breakpoint active in
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// the running code.
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return OriginalCodeAddress();
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} else {
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// No break point here just return the address of the call.
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return result;
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}
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2009-04-20 16:36:13 +00:00
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#else
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return result;
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#endif
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}
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Code* IC::GetTargetAtAddress(Address address) {
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2008-12-09 12:53:59 +00:00
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// Get the target address of the IC.
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Address target = Assembler::target_address_at(address);
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// Convert target address to the code object. Code::GetCodeFromTargetAddress
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// is safe for use during GC where the map might be marked.
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Code* result = Code::GetCodeFromTargetAddress(target);
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ASSERT(result->is_inline_cache_stub());
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return result;
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}
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void IC::SetTargetAtAddress(Address address, Code* target) {
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2010-12-07 11:31:57 +00:00
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ASSERT(target->is_inline_cache_stub() || target->is_compare_ic_stub());
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2012-09-20 10:45:38 +00:00
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Heap* heap = target->GetHeap();
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2012-02-20 12:57:23 +00:00
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Code* old_target = GetTargetAtAddress(address);
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2011-03-02 04:53:43 +00:00
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#ifdef DEBUG
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// STORE_IC and KEYED_STORE_IC use Code::extra_ic_state() to mark
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// ICs as strict mode. The strict-ness of the IC must be preserved.
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if (old_target->kind() == Code::STORE_IC ||
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old_target->kind() == Code::KEYED_STORE_IC) {
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ASSERT(Code::GetStrictMode(old_target->extra_ic_state()) ==
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Code::GetStrictMode(target->extra_ic_state()));
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}
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#endif
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Assembler::set_target_address_at(address, target->instruction_start());
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2012-10-02 15:46:55 +00:00
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if (heap->gc_state() == Heap::MARK_COMPACT) {
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heap->mark_compact_collector()->RecordCodeTargetPatch(address, target);
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2012-09-20 10:45:38 +00:00
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} else {
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heap->incremental_marking()->RecordCodeTargetPatch(address, target);
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}
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2012-02-20 12:57:23 +00:00
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PostPatching(address, target, old_target);
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}
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2013-11-14 16:25:31 +00:00
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InlineCacheHolderFlag IC::GetCodeCacheForObject(Object* object) {
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2013-10-01 13:17:04 +00:00
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if (object->IsJSObject()) return OWN_MAP;
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2008-07-03 15:10:15 +00:00
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// If the object is a value, we use the prototype map for the cache.
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2013-03-01 13:28:55 +00:00
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ASSERT(object->IsString() || object->IsSymbol() ||
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object->IsNumber() || object->IsBoolean());
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2013-03-22 16:33:50 +00:00
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return PROTOTYPE_MAP;
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2010-07-02 14:15:04 +00:00
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}
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2013-11-14 16:25:31 +00:00
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HeapObject* IC::GetCodeCacheHolder(Isolate* isolate,
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2013-02-27 13:22:29 +00:00
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Object* object,
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InlineCacheHolderFlag holder) {
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2013-11-14 16:37:36 +00:00
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if (object->IsSmi()) holder = PROTOTYPE_MAP;
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Object* map_owner = holder == OWN_MAP
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? object : object->GetPrototype(isolate);
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return HeapObject::cast(map_owner);
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}
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2013-11-18 17:18:14 +00:00
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InlineCacheHolderFlag IC::GetCodeCacheFlag(Type* type) {
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if (type->Is(Type::Boolean()) ||
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type->Is(Type::Number()) ||
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type->Is(Type::String()) ||
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type->Is(Type::Symbol())) {
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return PROTOTYPE_MAP;
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}
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return OWN_MAP;
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}
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Handle<Map> IC::GetCodeCacheHolder(InlineCacheHolderFlag flag,
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Type* type,
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Isolate* isolate) {
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if (flag == PROTOTYPE_MAP) {
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Context* context = isolate->context()->native_context();
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JSFunction* constructor;
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if (type->Is(Type::Boolean())) {
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constructor = context->boolean_function();
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} else if (type->Is(Type::Number())) {
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constructor = context->number_function();
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} else if (type->Is(Type::String())) {
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constructor = context->string_function();
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} else {
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ASSERT(type->Is(Type::Symbol()));
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constructor = context->symbol_function();
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}
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return handle(JSObject::cast(constructor->instance_prototype())->map());
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}
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return type->AsClass();
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}
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2008-07-03 15:10:15 +00:00
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} } // namespace v8::internal
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#endif // V8_IC_INL_H_
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