Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1 | // Copyright 2006-2008 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #include "v8.h" |
| 29 | |
| 30 | #include "bootstrapper.h" |
| 31 | #include "code-stubs.h" |
| 32 | #include "factory.h" |
| 33 | #include "macro-assembler.h" |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame^] | 34 | #include "oprofile-agent.h" |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 35 | |
| 36 | namespace v8 { |
| 37 | namespace internal { |
| 38 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 39 | bool CodeStub::FindCodeInCache(Code** code_out) { |
| 40 | if (has_custom_cache()) return GetCustomCache(code_out); |
| 41 | int index = Heap::code_stubs()->FindEntry(GetKey()); |
| 42 | if (index != NumberDictionary::kNotFound) { |
| 43 | *code_out = Code::cast(Heap::code_stubs()->ValueAt(index)); |
| 44 | return true; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 45 | } |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 46 | return false; |
| 47 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 48 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 49 | |
| 50 | void CodeStub::GenerateCode(MacroAssembler* masm) { |
| 51 | // Update the static counter each time a new code stub is generated. |
| 52 | Counters::code_stubs.Increment(); |
| 53 | // Nested stubs are not allowed for leafs. |
| 54 | masm->set_allow_stub_calls(AllowsStubCalls()); |
| 55 | // Generate the code for the stub. |
| 56 | masm->set_generating_stub(true); |
| 57 | Generate(masm); |
| 58 | } |
| 59 | |
| 60 | |
| 61 | void CodeStub::RecordCodeGeneration(Code* code, MacroAssembler* masm) { |
| 62 | code->set_major_key(MajorKey()); |
| 63 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame^] | 64 | #ifdef ENABLE_OPROFILE_AGENT |
| 65 | // Register the generated stub with the OPROFILE agent. |
| 66 | OProfileAgent::CreateNativeCodeRegion(GetName(), |
| 67 | code->instruction_start(), |
| 68 | code->instruction_size()); |
| 69 | #endif |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 70 | |
| 71 | LOG(CodeCreateEvent(Logger::STUB_TAG, code, GetName())); |
| 72 | Counters::total_stubs_code_size.Increment(code->instruction_size()); |
| 73 | |
| 74 | #ifdef ENABLE_DISASSEMBLER |
| 75 | if (FLAG_print_code_stubs) { |
| 76 | #ifdef DEBUG |
| 77 | Print(); |
| 78 | #endif |
| 79 | code->Disassemble(GetName()); |
| 80 | PrintF("\n"); |
| 81 | } |
| 82 | #endif |
| 83 | } |
| 84 | |
| 85 | |
| 86 | Handle<Code> CodeStub::GetCode() { |
| 87 | Code* code; |
| 88 | if (!FindCodeInCache(&code)) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 89 | v8::HandleScope scope; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 90 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 91 | // Generate the new code. |
| 92 | MacroAssembler masm(NULL, 256); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 93 | GenerateCode(&masm); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 94 | |
| 95 | // Create the code object. |
| 96 | CodeDesc desc; |
| 97 | masm.GetCode(&desc); |
| 98 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 99 | // Copy the generated code into a heap object. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 100 | Code::Flags flags = Code::ComputeFlags(Code::STUB, InLoop()); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 101 | Handle<Code> new_object = |
| 102 | Factory::NewCode(desc, NULL, flags, masm.CodeObject()); |
| 103 | RecordCodeGeneration(*new_object, &masm); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 104 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 105 | if (has_custom_cache()) { |
| 106 | SetCustomCache(*new_object); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 107 | } else { |
| 108 | // Update the dictionary and the root in Heap. |
| 109 | Handle<NumberDictionary> dict = |
| 110 | Factory::DictionaryAtNumberPut( |
| 111 | Handle<NumberDictionary>(Heap::code_stubs()), |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 112 | GetKey(), |
| 113 | new_object); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 114 | Heap::public_set_code_stubs(*dict); |
| 115 | } |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 116 | code = *new_object; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 117 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 118 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 119 | return Handle<Code>(code); |
| 120 | } |
| 121 | |
| 122 | |
| 123 | Object* CodeStub::TryGetCode() { |
| 124 | Code* code; |
| 125 | if (!FindCodeInCache(&code)) { |
| 126 | // Generate the new code. |
| 127 | MacroAssembler masm(NULL, 256); |
| 128 | GenerateCode(&masm); |
| 129 | |
| 130 | // Create the code object. |
| 131 | CodeDesc desc; |
| 132 | masm.GetCode(&desc); |
| 133 | |
| 134 | // Try to copy the generated code into a heap object. |
| 135 | Code::Flags flags = Code::ComputeFlags(Code::STUB, InLoop()); |
| 136 | Object* new_object = |
| 137 | Heap::CreateCode(desc, NULL, flags, masm.CodeObject()); |
| 138 | if (new_object->IsFailure()) return new_object; |
| 139 | code = Code::cast(new_object); |
| 140 | RecordCodeGeneration(code, &masm); |
| 141 | |
| 142 | if (has_custom_cache()) { |
| 143 | SetCustomCache(code); |
| 144 | } else { |
| 145 | // Try to update the code cache but do not fail if unable. |
| 146 | new_object = Heap::code_stubs()->AtNumberPut(GetKey(), code); |
| 147 | if (!new_object->IsFailure()) { |
| 148 | Heap::public_set_code_stubs(NumberDictionary::cast(new_object)); |
| 149 | } |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | return code; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 154 | } |
| 155 | |
| 156 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 157 | const char* CodeStub::MajorName(CodeStub::Major major_key, |
| 158 | bool allow_unknown_keys) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 159 | switch (major_key) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 160 | #define DEF_CASE(name) case name: return #name; |
| 161 | CODE_STUB_LIST(DEF_CASE) |
| 162 | #undef DEF_CASE |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 163 | default: |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 164 | if (!allow_unknown_keys) { |
| 165 | UNREACHABLE(); |
| 166 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 167 | return NULL; |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | |
| 172 | } } // namespace v8::internal |