| // Copyright 2006-2008 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "v8.h" |
| |
| #include "bootstrapper.h" |
| #include "code-stubs.h" |
| #include "factory.h" |
| #include "macro-assembler.h" |
| #include "oprofile-agent.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| bool CodeStub::FindCodeInCache(Code** code_out) { |
| if (has_custom_cache()) return GetCustomCache(code_out); |
| int index = Heap::code_stubs()->FindEntry(GetKey()); |
| if (index != NumberDictionary::kNotFound) { |
| *code_out = Code::cast(Heap::code_stubs()->ValueAt(index)); |
| return true; |
| } |
| return false; |
| } |
| |
| |
| void CodeStub::GenerateCode(MacroAssembler* masm) { |
| // Update the static counter each time a new code stub is generated. |
| Counters::code_stubs.Increment(); |
| // Nested stubs are not allowed for leafs. |
| masm->set_allow_stub_calls(AllowsStubCalls()); |
| // Generate the code for the stub. |
| masm->set_generating_stub(true); |
| Generate(masm); |
| } |
| |
| |
| void CodeStub::RecordCodeGeneration(Code* code, MacroAssembler* masm) { |
| code->set_major_key(MajorKey()); |
| |
| #ifdef ENABLE_OPROFILE_AGENT |
| // Register the generated stub with the OPROFILE agent. |
| OProfileAgent::CreateNativeCodeRegion(GetName(), |
| code->instruction_start(), |
| code->instruction_size()); |
| #endif |
| |
| LOG(CodeCreateEvent(Logger::STUB_TAG, code, GetName())); |
| Counters::total_stubs_code_size.Increment(code->instruction_size()); |
| |
| #ifdef ENABLE_DISASSEMBLER |
| if (FLAG_print_code_stubs) { |
| #ifdef DEBUG |
| Print(); |
| #endif |
| code->Disassemble(GetName()); |
| PrintF("\n"); |
| } |
| #endif |
| } |
| |
| |
| int CodeStub::GetCodeKind() { |
| return Code::STUB; |
| } |
| |
| |
| Handle<Code> CodeStub::GetCode() { |
| Code* code; |
| if (!FindCodeInCache(&code)) { |
| v8::HandleScope scope; |
| |
| // Generate the new code. |
| MacroAssembler masm(NULL, 256); |
| GenerateCode(&masm); |
| |
| // Create the code object. |
| CodeDesc desc; |
| masm.GetCode(&desc); |
| |
| // Copy the generated code into a heap object. |
| Code::Flags flags = Code::ComputeFlags( |
| static_cast<Code::Kind>(GetCodeKind()), |
| InLoop(), |
| GetICState()); |
| Handle<Code> new_object = |
| Factory::NewCode(desc, NULL, flags, masm.CodeObject()); |
| RecordCodeGeneration(*new_object, &masm); |
| |
| if (has_custom_cache()) { |
| SetCustomCache(*new_object); |
| } else { |
| // Update the dictionary and the root in Heap. |
| Handle<NumberDictionary> dict = |
| Factory::DictionaryAtNumberPut( |
| Handle<NumberDictionary>(Heap::code_stubs()), |
| GetKey(), |
| new_object); |
| Heap::public_set_code_stubs(*dict); |
| } |
| code = *new_object; |
| } |
| |
| return Handle<Code>(code); |
| } |
| |
| |
| Object* CodeStub::TryGetCode() { |
| Code* code; |
| if (!FindCodeInCache(&code)) { |
| // Generate the new code. |
| MacroAssembler masm(NULL, 256); |
| GenerateCode(&masm); |
| |
| // Create the code object. |
| CodeDesc desc; |
| masm.GetCode(&desc); |
| |
| // Try to copy the generated code into a heap object. |
| Code::Flags flags = Code::ComputeFlags( |
| static_cast<Code::Kind>(GetCodeKind()), |
| InLoop(), |
| GetICState()); |
| Object* new_object = |
| Heap::CreateCode(desc, NULL, flags, masm.CodeObject()); |
| if (new_object->IsFailure()) return new_object; |
| code = Code::cast(new_object); |
| RecordCodeGeneration(code, &masm); |
| |
| if (has_custom_cache()) { |
| SetCustomCache(code); |
| } else { |
| // Try to update the code cache but do not fail if unable. |
| new_object = Heap::code_stubs()->AtNumberPut(GetKey(), code); |
| if (!new_object->IsFailure()) { |
| Heap::public_set_code_stubs(NumberDictionary::cast(new_object)); |
| } |
| } |
| } |
| |
| return code; |
| } |
| |
| |
| const char* CodeStub::MajorName(CodeStub::Major major_key, |
| bool allow_unknown_keys) { |
| switch (major_key) { |
| #define DEF_CASE(name) case name: return #name; |
| CODE_STUB_LIST(DEF_CASE) |
| #undef DEF_CASE |
| default: |
| if (!allow_unknown_keys) { |
| UNREACHABLE(); |
| } |
| return NULL; |
| } |
| } |
| |
| |
| } } // namespace v8::internal |