1 // Copyright 2011 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 "codegen.h" 32 #include "compiler.h" 33 #include "debug.h" 34 #include "prettyprinter.h" 35 #include "rewriter.h" 36 #include "runtime.h" 37 #include "scopeinfo.h" 38 #include "stub-cache.h" 39 40 namespace v8 { 41 namespace internal { 42 43 #define __ ACCESS_MASM(masm_) 44 45 #ifdef DEBUG 46 47 Comment::Comment(MacroAssembler* masm, const char* msg) 48 : masm_(masm), msg_(msg) { 49 __ RecordComment(msg); 50 } 51 52 53 Comment::~Comment() { 54 if (msg_[0] == '[') __ RecordComment("]"); 55 } 56 57 #endif // DEBUG 58 59 #undef __ 60 61 62 void CodeGenerator::MakeCodePrologue(CompilationInfo* info) { 63 #ifdef DEBUG 64 bool print_source = false; 65 bool print_ast = false; 66 bool print_json_ast = false; 67 const char* ftype; 68 69 if (Isolate::Current()->bootstrapper()->IsActive()) { 70 print_source = FLAG_print_builtin_source; 71 print_ast = FLAG_print_builtin_ast; 72 print_json_ast = FLAG_print_builtin_json_ast; 73 ftype = "builtin"; 74 } else { 75 print_source = FLAG_print_source; 76 print_ast = FLAG_print_ast; 77 print_json_ast = FLAG_print_json_ast; 78 Vector<const char> filter = CStrVector(FLAG_hydrogen_filter); 79 if (print_source && !filter.is_empty()) { 80 print_source = info->function()->name()->IsEqualTo(filter); 81 } 82 if (print_ast && !filter.is_empty()) { 83 print_ast = info->function()->name()->IsEqualTo(filter); 84 } 85 if (print_json_ast && !filter.is_empty()) { 86 print_json_ast = info->function()->name()->IsEqualTo(filter); 87 } 88 ftype = "user-defined"; 89 } 90 91 if (FLAG_trace_codegen || print_source || print_ast) { 92 PrintF("*** Generate code for %s function: ", ftype); 93 info->function()->name()->ShortPrint(); 94 PrintF(" ***\n"); 95 } 96 97 if (print_source) { 98 PrintF("--- Source from AST ---\n%s\n", 99 PrettyPrinter().PrintProgram(info->function())); 100 } 101 102 if (print_ast) { 103 PrintF("--- AST ---\n%s\n", 104 AstPrinter().PrintProgram(info->function())); 105 } 106 107 if (print_json_ast) { 108 JsonAstBuilder builder; 109 PrintF("%s", builder.BuildProgram(info->function())); 110 } 111 #endif // DEBUG 112 } 113 114 115 Handle<Code> CodeGenerator::MakeCodeEpilogue(MacroAssembler* masm, 116 Code::Flags flags, 117 CompilationInfo* info) { 118 Isolate* isolate = info->isolate(); 119 120 // Allocate and install the code. 121 CodeDesc desc; 122 masm->GetCode(&desc); 123 Handle<Code> code = 124 isolate->factory()->NewCode(desc, flags, masm->CodeObject()); 125 126 if (!code.is_null()) { 127 isolate->counters()->total_compiled_code_size()->Increment( 128 code->instruction_size()); 129 } 130 return code; 131 } 132 133 134 void CodeGenerator::PrintCode(Handle<Code> code, CompilationInfo* info) { 135 #ifdef ENABLE_DISASSEMBLER 136 bool print_code = Isolate::Current()->bootstrapper()->IsActive() 137 ? FLAG_print_builtin_code 138 : (FLAG_print_code || (info->IsOptimizing() && FLAG_print_opt_code)); 139 Vector<const char> filter = CStrVector(FLAG_hydrogen_filter); 140 FunctionLiteral* function = info->function(); 141 bool match = filter.is_empty() || function->debug_name()->IsEqualTo(filter); 142 if (print_code && match) { 143 // Print the source code if available. 144 Handle<Script> script = info->script(); 145 if (!script->IsUndefined() && !script->source()->IsUndefined()) { 146 PrintF("--- Raw source ---\n"); 147 StringInputBuffer stream(String::cast(script->source())); 148 stream.Seek(function->start_position()); 149 // fun->end_position() points to the last character in the stream. We 150 // need to compensate by adding one to calculate the length. 151 int source_len = 152 function->end_position() - function->start_position() + 1; 153 for (int i = 0; i < source_len; i++) { 154 if (stream.has_more()) PrintF("%c", stream.GetNext()); 155 } 156 PrintF("\n\n"); 157 } 158 if (info->IsOptimizing()) { 159 if (FLAG_print_unopt_code) { 160 PrintF("--- Unoptimized code ---\n"); 161 info->closure()->shared()->code()->Disassemble( 162 *function->debug_name()->ToCString()); 163 } 164 PrintF("--- Optimized code ---\n"); 165 } else { 166 PrintF("--- Code ---\n"); 167 } 168 code->Disassemble(*function->debug_name()->ToCString()); 169 } 170 #endif // ENABLE_DISASSEMBLER 171 } 172 173 #ifdef ENABLE_LOGGING_AND_PROFILING 174 175 static Vector<const char> kRegexp = CStrVector("regexp"); 176 177 bool CodeGenerator::ShouldGenerateLog(Expression* type) { 178 ASSERT(type != NULL); 179 if (!LOGGER->is_logging() && !CpuProfiler::is_profiling()) return false; 180 Handle<String> name = Handle<String>::cast(type->AsLiteral()->handle()); 181 if (FLAG_log_regexp) { 182 if (name->IsEqualTo(kRegexp)) 183 return true; 184 } 185 return false; 186 } 187 188 #endif 189 190 191 bool CodeGenerator::RecordPositions(MacroAssembler* masm, 192 int pos, 193 bool right_here) { 194 if (pos != RelocInfo::kNoPosition) { 195 masm->positions_recorder()->RecordStatementPosition(pos); 196 masm->positions_recorder()->RecordPosition(pos); 197 if (right_here) { 198 return masm->positions_recorder()->WriteRecordedPositions(); 199 } 200 } 201 return false; 202 } 203 204 205 const char* GenericUnaryOpStub::GetName() { 206 switch (op_) { 207 case Token::SUB: 208 if (negative_zero_ == kStrictNegativeZero) { 209 return overwrite_ == UNARY_OVERWRITE 210 ? "GenericUnaryOpStub_SUB_Overwrite_Strict0" 211 : "GenericUnaryOpStub_SUB_Alloc_Strict0"; 212 } else { 213 return overwrite_ == UNARY_OVERWRITE 214 ? "GenericUnaryOpStub_SUB_Overwrite_Ignore0" 215 : "GenericUnaryOpStub_SUB_Alloc_Ignore0"; 216 } 217 case Token::BIT_NOT: 218 return overwrite_ == UNARY_OVERWRITE 219 ? "GenericUnaryOpStub_BIT_NOT_Overwrite" 220 : "GenericUnaryOpStub_BIT_NOT_Alloc"; 221 default: 222 UNREACHABLE(); 223 return "<unknown>"; 224 } 225 } 226 227 228 void ArgumentsAccessStub::Generate(MacroAssembler* masm) { 229 switch (type_) { 230 case READ_ELEMENT: 231 GenerateReadElement(masm); 232 break; 233 case NEW_NON_STRICT: 234 case NEW_STRICT: 235 GenerateNewObject(masm); 236 break; 237 } 238 } 239 240 241 int CEntryStub::MinorKey() { 242 ASSERT(result_size_ == 1 || result_size_ == 2); 243 int result = save_doubles_ ? 1 : 0; 244 #ifdef _WIN64 245 return result | ((result_size_ == 1) ? 0 : 2); 246 #else 247 return result; 248 #endif 249 } 250 251 252 } } // namespace v8::internal 253
