Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1 | // Copyright 2009 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 | |
| 29 | #include <stdlib.h> |
| 30 | #include <errno.h> |
| 31 | |
| 32 | #include "d8.h" |
| 33 | #include "d8-debug.h" |
| 34 | #include "debug.h" |
| 35 | #include "api.h" |
| 36 | #include "natives.h" |
| 37 | #include "platform.h" |
| 38 | |
| 39 | |
| 40 | namespace v8 { |
| 41 | |
| 42 | |
| 43 | const char* Shell::kHistoryFileName = ".d8_history"; |
| 44 | const char* Shell::kPrompt = "d8> "; |
| 45 | |
| 46 | |
| 47 | LineEditor *LineEditor::first_ = NULL; |
| 48 | |
| 49 | |
| 50 | LineEditor::LineEditor(Type type, const char* name) |
| 51 | : type_(type), |
| 52 | name_(name), |
| 53 | next_(first_) { |
| 54 | first_ = this; |
| 55 | } |
| 56 | |
| 57 | |
| 58 | LineEditor* LineEditor::Get() { |
| 59 | LineEditor* current = first_; |
| 60 | LineEditor* best = current; |
| 61 | while (current != NULL) { |
| 62 | if (current->type_ > best->type_) |
| 63 | best = current; |
| 64 | current = current->next_; |
| 65 | } |
| 66 | return best; |
| 67 | } |
| 68 | |
| 69 | |
| 70 | class DumbLineEditor: public LineEditor { |
| 71 | public: |
| 72 | DumbLineEditor() : LineEditor(LineEditor::DUMB, "dumb") { } |
| 73 | virtual i::SmartPointer<char> Prompt(const char* prompt); |
| 74 | }; |
| 75 | |
| 76 | |
| 77 | static DumbLineEditor dumb_line_editor; |
| 78 | |
| 79 | |
| 80 | i::SmartPointer<char> DumbLineEditor::Prompt(const char* prompt) { |
| 81 | static const int kBufferSize = 256; |
| 82 | char buffer[kBufferSize]; |
| 83 | printf("%s", prompt); |
| 84 | char* str = fgets(buffer, kBufferSize, stdin); |
| 85 | return i::SmartPointer<char>(str ? i::StrDup(str) : str); |
| 86 | } |
| 87 | |
| 88 | |
| 89 | CounterMap* Shell::counter_map_; |
| 90 | i::OS::MemoryMappedFile* Shell::counters_file_ = NULL; |
| 91 | CounterCollection Shell::local_counters_; |
| 92 | CounterCollection* Shell::counters_ = &local_counters_; |
| 93 | Persistent<Context> Shell::utility_context_; |
| 94 | Persistent<Context> Shell::evaluation_context_; |
| 95 | |
| 96 | |
| 97 | bool CounterMap::Match(void* key1, void* key2) { |
| 98 | const char* name1 = reinterpret_cast<const char*>(key1); |
| 99 | const char* name2 = reinterpret_cast<const char*>(key2); |
| 100 | return strcmp(name1, name2) == 0; |
| 101 | } |
| 102 | |
| 103 | |
| 104 | // Converts a V8 value to a C string. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 105 | const char* Shell::ToCString(const v8::String::Utf8Value& value) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 106 | return *value ? *value : "<string conversion failed>"; |
| 107 | } |
| 108 | |
| 109 | |
| 110 | // Executes a string within the current v8 context. |
| 111 | bool Shell::ExecuteString(Handle<String> source, |
| 112 | Handle<Value> name, |
| 113 | bool print_result, |
| 114 | bool report_exceptions) { |
| 115 | HandleScope handle_scope; |
| 116 | TryCatch try_catch; |
| 117 | if (i::FLAG_debugger) { |
| 118 | // When debugging make exceptions appear to be uncaught. |
| 119 | try_catch.SetVerbose(true); |
| 120 | } |
| 121 | Handle<Script> script = Script::Compile(source, name); |
| 122 | if (script.IsEmpty()) { |
| 123 | // Print errors that happened during compilation. |
| 124 | if (report_exceptions && !i::FLAG_debugger) |
| 125 | ReportException(&try_catch); |
| 126 | return false; |
| 127 | } else { |
| 128 | Handle<Value> result = script->Run(); |
| 129 | if (result.IsEmpty()) { |
| 130 | // Print errors that happened during execution. |
| 131 | if (report_exceptions && !i::FLAG_debugger) |
| 132 | ReportException(&try_catch); |
| 133 | return false; |
| 134 | } else { |
| 135 | if (print_result && !result->IsUndefined()) { |
| 136 | // If all went well and the result wasn't undefined then print |
| 137 | // the returned value. |
| 138 | v8::String::Utf8Value str(result); |
| 139 | const char* cstr = ToCString(str); |
| 140 | printf("%s\n", cstr); |
| 141 | } |
| 142 | return true; |
| 143 | } |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | |
| 148 | Handle<Value> Shell::Print(const Arguments& args) { |
| 149 | Handle<Value> val = Write(args); |
| 150 | printf("\n"); |
| 151 | return val; |
| 152 | } |
| 153 | |
| 154 | |
| 155 | Handle<Value> Shell::Write(const Arguments& args) { |
| 156 | for (int i = 0; i < args.Length(); i++) { |
| 157 | HandleScope handle_scope; |
| 158 | if (i != 0) { |
| 159 | printf(" "); |
| 160 | } |
| 161 | v8::String::Utf8Value str(args[i]); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 162 | int n = fwrite(*str, sizeof(**str), str.length(), stdout); |
| 163 | if (n != str.length()) { |
| 164 | printf("Error in fwrite\n"); |
| 165 | exit(1); |
| 166 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 167 | } |
| 168 | return Undefined(); |
| 169 | } |
| 170 | |
| 171 | |
| 172 | Handle<Value> Shell::Read(const Arguments& args) { |
| 173 | String::Utf8Value file(args[0]); |
| 174 | if (*file == NULL) { |
| 175 | return ThrowException(String::New("Error loading file")); |
| 176 | } |
| 177 | Handle<String> source = ReadFile(*file); |
| 178 | if (source.IsEmpty()) { |
| 179 | return ThrowException(String::New("Error loading file")); |
| 180 | } |
| 181 | return source; |
| 182 | } |
| 183 | |
| 184 | |
| 185 | Handle<Value> Shell::ReadLine(const Arguments& args) { |
| 186 | i::SmartPointer<char> line(i::ReadLine("")); |
| 187 | if (*line == NULL) { |
| 188 | return Null(); |
| 189 | } |
| 190 | size_t len = strlen(*line); |
| 191 | if (len > 0 && line[len - 1] == '\n') { |
| 192 | --len; |
| 193 | } |
| 194 | return String::New(*line, len); |
| 195 | } |
| 196 | |
| 197 | |
| 198 | Handle<Value> Shell::Load(const Arguments& args) { |
| 199 | for (int i = 0; i < args.Length(); i++) { |
| 200 | HandleScope handle_scope; |
| 201 | String::Utf8Value file(args[i]); |
| 202 | if (*file == NULL) { |
| 203 | return ThrowException(String::New("Error loading file")); |
| 204 | } |
| 205 | Handle<String> source = ReadFile(*file); |
| 206 | if (source.IsEmpty()) { |
| 207 | return ThrowException(String::New("Error loading file")); |
| 208 | } |
| 209 | if (!ExecuteString(source, String::New(*file), false, false)) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 210 | return ThrowException(String::New("Error executing file")); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 211 | } |
| 212 | } |
| 213 | return Undefined(); |
| 214 | } |
| 215 | |
| 216 | |
| 217 | Handle<Value> Shell::Yield(const Arguments& args) { |
| 218 | v8::Unlocker unlocker; |
| 219 | return Undefined(); |
| 220 | } |
| 221 | |
| 222 | |
| 223 | Handle<Value> Shell::Quit(const Arguments& args) { |
| 224 | int exit_code = args[0]->Int32Value(); |
| 225 | OnExit(); |
| 226 | exit(exit_code); |
| 227 | return Undefined(); |
| 228 | } |
| 229 | |
| 230 | |
| 231 | Handle<Value> Shell::Version(const Arguments& args) { |
| 232 | return String::New(V8::GetVersion()); |
| 233 | } |
| 234 | |
| 235 | |
| 236 | void Shell::ReportException(v8::TryCatch* try_catch) { |
| 237 | HandleScope handle_scope; |
| 238 | v8::String::Utf8Value exception(try_catch->Exception()); |
| 239 | const char* exception_string = ToCString(exception); |
| 240 | Handle<Message> message = try_catch->Message(); |
| 241 | if (message.IsEmpty()) { |
| 242 | // V8 didn't provide any extra information about this error; just |
| 243 | // print the exception. |
| 244 | printf("%s\n", exception_string); |
| 245 | } else { |
| 246 | // Print (filename):(line number): (message). |
| 247 | v8::String::Utf8Value filename(message->GetScriptResourceName()); |
| 248 | const char* filename_string = ToCString(filename); |
| 249 | int linenum = message->GetLineNumber(); |
| 250 | printf("%s:%i: %s\n", filename_string, linenum, exception_string); |
| 251 | // Print line of source code. |
| 252 | v8::String::Utf8Value sourceline(message->GetSourceLine()); |
| 253 | const char* sourceline_string = ToCString(sourceline); |
| 254 | printf("%s\n", sourceline_string); |
| 255 | // Print wavy underline (GetUnderline is deprecated). |
| 256 | int start = message->GetStartColumn(); |
| 257 | for (int i = 0; i < start; i++) { |
| 258 | printf(" "); |
| 259 | } |
| 260 | int end = message->GetEndColumn(); |
| 261 | for (int i = start; i < end; i++) { |
| 262 | printf("^"); |
| 263 | } |
| 264 | printf("\n"); |
| 265 | } |
| 266 | } |
| 267 | |
| 268 | |
| 269 | Handle<Array> Shell::GetCompletions(Handle<String> text, Handle<String> full) { |
| 270 | HandleScope handle_scope; |
| 271 | Context::Scope context_scope(utility_context_); |
| 272 | Handle<Object> global = utility_context_->Global(); |
| 273 | Handle<Value> fun = global->Get(String::New("GetCompletions")); |
| 274 | static const int kArgc = 3; |
| 275 | Handle<Value> argv[kArgc] = { evaluation_context_->Global(), text, full }; |
| 276 | Handle<Value> val = Handle<Function>::Cast(fun)->Call(global, kArgc, argv); |
| 277 | return handle_scope.Close(Handle<Array>::Cast(val)); |
| 278 | } |
| 279 | |
| 280 | |
| 281 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 282 | Handle<Object> Shell::DebugMessageDetails(Handle<String> message) { |
| 283 | Context::Scope context_scope(utility_context_); |
| 284 | Handle<Object> global = utility_context_->Global(); |
| 285 | Handle<Value> fun = global->Get(String::New("DebugMessageDetails")); |
| 286 | static const int kArgc = 1; |
| 287 | Handle<Value> argv[kArgc] = { message }; |
| 288 | Handle<Value> val = Handle<Function>::Cast(fun)->Call(global, kArgc, argv); |
| 289 | return Handle<Object>::Cast(val); |
| 290 | } |
| 291 | |
| 292 | |
| 293 | Handle<Value> Shell::DebugCommandToJSONRequest(Handle<String> command) { |
| 294 | Context::Scope context_scope(utility_context_); |
| 295 | Handle<Object> global = utility_context_->Global(); |
| 296 | Handle<Value> fun = global->Get(String::New("DebugCommandToJSONRequest")); |
| 297 | static const int kArgc = 1; |
| 298 | Handle<Value> argv[kArgc] = { command }; |
| 299 | Handle<Value> val = Handle<Function>::Cast(fun)->Call(global, kArgc, argv); |
| 300 | return val; |
| 301 | } |
| 302 | #endif |
| 303 | |
| 304 | |
| 305 | int32_t* Counter::Bind(const char* name, bool is_histogram) { |
| 306 | int i; |
| 307 | for (i = 0; i < kMaxNameSize - 1 && name[i]; i++) |
| 308 | name_[i] = static_cast<char>(name[i]); |
| 309 | name_[i] = '\0'; |
| 310 | is_histogram_ = is_histogram; |
| 311 | return ptr(); |
| 312 | } |
| 313 | |
| 314 | |
| 315 | void Counter::AddSample(int32_t sample) { |
| 316 | count_++; |
| 317 | sample_total_ += sample; |
| 318 | } |
| 319 | |
| 320 | |
| 321 | CounterCollection::CounterCollection() { |
| 322 | magic_number_ = 0xDEADFACE; |
| 323 | max_counters_ = kMaxCounters; |
| 324 | max_name_size_ = Counter::kMaxNameSize; |
| 325 | counters_in_use_ = 0; |
| 326 | } |
| 327 | |
| 328 | |
| 329 | Counter* CounterCollection::GetNextCounter() { |
| 330 | if (counters_in_use_ == kMaxCounters) return NULL; |
| 331 | return &counters_[counters_in_use_++]; |
| 332 | } |
| 333 | |
| 334 | |
| 335 | void Shell::MapCounters(const char* name) { |
| 336 | counters_file_ = i::OS::MemoryMappedFile::create(name, |
| 337 | sizeof(CounterCollection), &local_counters_); |
| 338 | void* memory = (counters_file_ == NULL) ? |
| 339 | NULL : counters_file_->memory(); |
| 340 | if (memory == NULL) { |
| 341 | printf("Could not map counters file %s\n", name); |
| 342 | exit(1); |
| 343 | } |
| 344 | counters_ = static_cast<CounterCollection*>(memory); |
| 345 | V8::SetCounterFunction(LookupCounter); |
| 346 | V8::SetCreateHistogramFunction(CreateHistogram); |
| 347 | V8::SetAddHistogramSampleFunction(AddHistogramSample); |
| 348 | } |
| 349 | |
| 350 | |
| 351 | int CounterMap::Hash(const char* name) { |
| 352 | int h = 0; |
| 353 | int c; |
| 354 | while ((c = *name++) != 0) { |
| 355 | h += h << 5; |
| 356 | h += c; |
| 357 | } |
| 358 | return h; |
| 359 | } |
| 360 | |
| 361 | |
| 362 | Counter* Shell::GetCounter(const char* name, bool is_histogram) { |
| 363 | Counter* counter = counter_map_->Lookup(name); |
| 364 | |
| 365 | if (counter == NULL) { |
| 366 | counter = counters_->GetNextCounter(); |
| 367 | if (counter != NULL) { |
| 368 | counter_map_->Set(name, counter); |
| 369 | counter->Bind(name, is_histogram); |
| 370 | } |
| 371 | } else { |
| 372 | ASSERT(counter->is_histogram() == is_histogram); |
| 373 | } |
| 374 | return counter; |
| 375 | } |
| 376 | |
| 377 | |
| 378 | int* Shell::LookupCounter(const char* name) { |
| 379 | Counter* counter = GetCounter(name, false); |
| 380 | |
| 381 | if (counter != NULL) { |
| 382 | return counter->ptr(); |
| 383 | } else { |
| 384 | return NULL; |
| 385 | } |
| 386 | } |
| 387 | |
| 388 | |
| 389 | void* Shell::CreateHistogram(const char* name, |
| 390 | int min, |
| 391 | int max, |
| 392 | size_t buckets) { |
| 393 | return GetCounter(name, true); |
| 394 | } |
| 395 | |
| 396 | |
| 397 | void Shell::AddHistogramSample(void* histogram, int sample) { |
| 398 | Counter* counter = reinterpret_cast<Counter*>(histogram); |
| 399 | counter->AddSample(sample); |
| 400 | } |
| 401 | |
| 402 | |
| 403 | void Shell::Initialize() { |
| 404 | Shell::counter_map_ = new CounterMap(); |
| 405 | // Set up counters |
| 406 | if (i::FLAG_map_counters != NULL) |
| 407 | MapCounters(i::FLAG_map_counters); |
| 408 | if (i::FLAG_dump_counters) { |
| 409 | V8::SetCounterFunction(LookupCounter); |
| 410 | V8::SetCreateHistogramFunction(CreateHistogram); |
| 411 | V8::SetAddHistogramSampleFunction(AddHistogramSample); |
| 412 | } |
| 413 | |
| 414 | // Initialize the global objects |
| 415 | HandleScope scope; |
| 416 | Handle<ObjectTemplate> global_template = ObjectTemplate::New(); |
| 417 | global_template->Set(String::New("print"), FunctionTemplate::New(Print)); |
| 418 | global_template->Set(String::New("write"), FunctionTemplate::New(Write)); |
| 419 | global_template->Set(String::New("read"), FunctionTemplate::New(Read)); |
| 420 | global_template->Set(String::New("readline"), |
| 421 | FunctionTemplate::New(ReadLine)); |
| 422 | global_template->Set(String::New("load"), FunctionTemplate::New(Load)); |
| 423 | global_template->Set(String::New("quit"), FunctionTemplate::New(Quit)); |
| 424 | global_template->Set(String::New("version"), FunctionTemplate::New(Version)); |
| 425 | |
| 426 | Handle<ObjectTemplate> os_templ = ObjectTemplate::New(); |
| 427 | AddOSMethods(os_templ); |
| 428 | global_template->Set(String::New("os"), os_templ); |
| 429 | |
| 430 | utility_context_ = Context::New(NULL, global_template); |
| 431 | utility_context_->SetSecurityToken(Undefined()); |
| 432 | Context::Scope utility_scope(utility_context_); |
| 433 | |
| 434 | i::JSArguments js_args = i::FLAG_js_arguments; |
| 435 | i::Handle<i::FixedArray> arguments_array = |
| 436 | i::Factory::NewFixedArray(js_args.argc()); |
| 437 | for (int j = 0; j < js_args.argc(); j++) { |
| 438 | i::Handle<i::String> arg = |
| 439 | i::Factory::NewStringFromUtf8(i::CStrVector(js_args[j])); |
| 440 | arguments_array->set(j, *arg); |
| 441 | } |
| 442 | i::Handle<i::JSArray> arguments_jsarray = |
| 443 | i::Factory::NewJSArrayWithElements(arguments_array); |
| 444 | global_template->Set(String::New("arguments"), |
| 445 | Utils::ToLocal(arguments_jsarray)); |
| 446 | |
| 447 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 448 | // Install the debugger object in the utility scope |
| 449 | i::Debug::Load(); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 450 | i::Handle<i::JSObject> debug |
| 451 | = i::Handle<i::JSObject>(i::Debug::debug_context()->global()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 452 | utility_context_->Global()->Set(String::New("$debug"), |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 453 | Utils::ToLocal(debug)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 454 | #endif |
| 455 | |
| 456 | // Run the d8 shell utility script in the utility context |
| 457 | int source_index = i::NativesCollection<i::D8>::GetIndex("d8"); |
| 458 | i::Vector<const char> shell_source |
| 459 | = i::NativesCollection<i::D8>::GetScriptSource(source_index); |
| 460 | i::Vector<const char> shell_source_name |
| 461 | = i::NativesCollection<i::D8>::GetScriptName(source_index); |
| 462 | Handle<String> source = String::New(shell_source.start(), |
| 463 | shell_source.length()); |
| 464 | Handle<String> name = String::New(shell_source_name.start(), |
| 465 | shell_source_name.length()); |
| 466 | Handle<Script> script = Script::Compile(source, name); |
| 467 | script->Run(); |
| 468 | |
| 469 | // Mark the d8 shell script as native to avoid it showing up as normal source |
| 470 | // in the debugger. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 471 | i::Handle<i::Object> compiled_script = Utils::OpenHandle(*script); |
| 472 | i::Handle<i::Script> script_object = compiled_script->IsJSFunction() |
| 473 | ? i::Handle<i::Script>(i::Script::cast( |
| 474 | i::JSFunction::cast(*compiled_script)->shared()->script())) |
| 475 | : i::Handle<i::Script>(i::Script::cast( |
| 476 | i::SharedFunctionInfo::cast(*compiled_script)->script())); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 477 | script_object->set_type(i::Smi::FromInt(i::Script::TYPE_NATIVE)); |
| 478 | |
| 479 | // Create the evaluation context |
| 480 | evaluation_context_ = Context::New(NULL, global_template); |
| 481 | evaluation_context_->SetSecurityToken(Undefined()); |
| 482 | |
| 483 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 484 | // Set the security token of the debug context to allow access. |
| 485 | i::Debug::debug_context()->set_security_token(i::Heap::undefined_value()); |
| 486 | |
| 487 | // Start the debugger agent if requested. |
| 488 | if (i::FLAG_debugger_agent) { |
| 489 | v8::Debug::EnableAgent("d8 shell", i::FLAG_debugger_port); |
| 490 | } |
| 491 | |
| 492 | // Start the in-process debugger if requested. |
| 493 | if (i::FLAG_debugger && !i::FLAG_debugger_agent) { |
| 494 | v8::Debug::SetDebugEventListener(HandleDebugEvent); |
| 495 | } |
| 496 | #endif |
| 497 | } |
| 498 | |
| 499 | |
| 500 | void Shell::OnExit() { |
| 501 | if (i::FLAG_dump_counters) { |
| 502 | ::printf("+----------------------------------------+-------------+\n"); |
| 503 | ::printf("| Name | Value |\n"); |
| 504 | ::printf("+----------------------------------------+-------------+\n"); |
| 505 | for (CounterMap::Iterator i(counter_map_); i.More(); i.Next()) { |
| 506 | Counter* counter = i.CurrentValue(); |
| 507 | if (counter->is_histogram()) { |
| 508 | ::printf("| c:%-36s | %11i |\n", i.CurrentKey(), counter->count()); |
| 509 | ::printf("| t:%-36s | %11i |\n", |
| 510 | i.CurrentKey(), |
| 511 | counter->sample_total()); |
| 512 | } else { |
| 513 | ::printf("| %-38s | %11i |\n", i.CurrentKey(), counter->count()); |
| 514 | } |
| 515 | } |
| 516 | ::printf("+----------------------------------------+-------------+\n"); |
| 517 | } |
| 518 | if (counters_file_ != NULL) |
| 519 | delete counters_file_; |
| 520 | } |
| 521 | |
| 522 | |
| 523 | static char* ReadChars(const char* name, int* size_out) { |
| 524 | v8::Unlocker unlocker; // Release the V8 lock while reading files. |
| 525 | FILE* file = i::OS::FOpen(name, "rb"); |
| 526 | if (file == NULL) return NULL; |
| 527 | |
| 528 | fseek(file, 0, SEEK_END); |
| 529 | int size = ftell(file); |
| 530 | rewind(file); |
| 531 | |
| 532 | char* chars = new char[size + 1]; |
| 533 | chars[size] = '\0'; |
| 534 | for (int i = 0; i < size;) { |
| 535 | int read = fread(&chars[i], 1, size - i, file); |
| 536 | i += read; |
| 537 | } |
| 538 | fclose(file); |
| 539 | *size_out = size; |
| 540 | return chars; |
| 541 | } |
| 542 | |
| 543 | |
| 544 | static char* ReadToken(char* data, char token) { |
| 545 | char* next = i::OS::StrChr(data, token); |
| 546 | if (next != NULL) { |
| 547 | *next = '\0'; |
| 548 | return (next + 1); |
| 549 | } |
| 550 | |
| 551 | return NULL; |
| 552 | } |
| 553 | |
| 554 | |
| 555 | static char* ReadLine(char* data) { |
| 556 | return ReadToken(data, '\n'); |
| 557 | } |
| 558 | |
| 559 | |
| 560 | static char* ReadWord(char* data) { |
| 561 | return ReadToken(data, ' '); |
| 562 | } |
| 563 | |
| 564 | |
| 565 | // Reads a file into a v8 string. |
| 566 | Handle<String> Shell::ReadFile(const char* name) { |
| 567 | int size = 0; |
| 568 | char* chars = ReadChars(name, &size); |
| 569 | if (chars == NULL) return Handle<String>(); |
| 570 | Handle<String> result = String::New(chars); |
| 571 | delete[] chars; |
| 572 | return result; |
| 573 | } |
| 574 | |
| 575 | |
| 576 | void Shell::RunShell() { |
| 577 | LineEditor* editor = LineEditor::Get(); |
| 578 | printf("V8 version %s [console: %s]\n", V8::GetVersion(), editor->name()); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 579 | if (i::FLAG_debugger) { |
| 580 | printf("JavaScript debugger enabled\n"); |
| 581 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 582 | editor->Open(); |
| 583 | while (true) { |
| 584 | Locker locker; |
| 585 | HandleScope handle_scope; |
| 586 | Context::Scope context_scope(evaluation_context_); |
| 587 | i::SmartPointer<char> input = editor->Prompt(Shell::kPrompt); |
| 588 | if (input.is_empty()) |
| 589 | break; |
| 590 | editor->AddHistory(*input); |
| 591 | Handle<String> name = String::New("(d8)"); |
| 592 | ExecuteString(String::New(*input), name, true, true); |
| 593 | } |
| 594 | editor->Close(); |
| 595 | printf("\n"); |
| 596 | } |
| 597 | |
| 598 | |
| 599 | class ShellThread : public i::Thread { |
| 600 | public: |
| 601 | ShellThread(int no, i::Vector<const char> files) |
| 602 | : no_(no), files_(files) { } |
| 603 | virtual void Run(); |
| 604 | private: |
| 605 | int no_; |
| 606 | i::Vector<const char> files_; |
| 607 | }; |
| 608 | |
| 609 | |
| 610 | void ShellThread::Run() { |
| 611 | // Prepare the context for this thread. |
| 612 | Locker locker; |
| 613 | HandleScope scope; |
| 614 | Handle<ObjectTemplate> global_template = ObjectTemplate::New(); |
| 615 | global_template->Set(String::New("print"), |
| 616 | FunctionTemplate::New(Shell::Print)); |
| 617 | global_template->Set(String::New("write"), |
| 618 | FunctionTemplate::New(Shell::Write)); |
| 619 | global_template->Set(String::New("read"), |
| 620 | FunctionTemplate::New(Shell::Read)); |
| 621 | global_template->Set(String::New("readline"), |
| 622 | FunctionTemplate::New(Shell::ReadLine)); |
| 623 | global_template->Set(String::New("load"), |
| 624 | FunctionTemplate::New(Shell::Load)); |
| 625 | global_template->Set(String::New("yield"), |
| 626 | FunctionTemplate::New(Shell::Yield)); |
| 627 | global_template->Set(String::New("version"), |
| 628 | FunctionTemplate::New(Shell::Version)); |
| 629 | |
| 630 | char* ptr = const_cast<char*>(files_.start()); |
| 631 | while ((ptr != NULL) && (*ptr != '\0')) { |
| 632 | // For each newline-separated line. |
| 633 | char* next_line = ReadLine(ptr); |
| 634 | |
| 635 | if (*ptr == '#') { |
| 636 | // Skip comment lines. |
| 637 | ptr = next_line; |
| 638 | continue; |
| 639 | } |
| 640 | |
| 641 | Persistent<Context> thread_context = Context::New(NULL, global_template); |
| 642 | thread_context->SetSecurityToken(Undefined()); |
| 643 | Context::Scope context_scope(thread_context); |
| 644 | |
| 645 | while ((ptr != NULL) && (*ptr != '\0')) { |
| 646 | char* filename = ptr; |
| 647 | ptr = ReadWord(ptr); |
| 648 | |
| 649 | // Skip empty strings. |
| 650 | if (strlen(filename) == 0) { |
| 651 | break; |
| 652 | } |
| 653 | |
| 654 | Handle<String> str = Shell::ReadFile(filename); |
| 655 | if (str.IsEmpty()) { |
| 656 | printf("WARNING: %s not found\n", filename); |
| 657 | break; |
| 658 | } |
| 659 | |
| 660 | Shell::ExecuteString(str, String::New(filename), false, false); |
| 661 | } |
| 662 | |
| 663 | thread_context.Dispose(); |
| 664 | ptr = next_line; |
| 665 | } |
| 666 | } |
| 667 | |
| 668 | |
| 669 | int Shell::Main(int argc, char* argv[]) { |
| 670 | i::FlagList::SetFlagsFromCommandLine(&argc, argv, true); |
| 671 | if (i::FLAG_help) { |
| 672 | return 1; |
| 673 | } |
| 674 | Initialize(); |
| 675 | bool run_shell = (argc == 1); |
| 676 | |
| 677 | // Default use preemption if threads are created. |
| 678 | bool use_preemption = true; |
| 679 | |
| 680 | // Default to use lowest possible thread preemption interval to test as many |
| 681 | // edgecases as possible. |
| 682 | int preemption_interval = 1; |
| 683 | |
| 684 | i::List<i::Thread*> threads(1); |
| 685 | |
| 686 | { |
| 687 | // Acquire the V8 lock once initialization has finished. Since the thread |
| 688 | // below may spawn new threads accessing V8 holding the V8 lock here is |
| 689 | // mandatory. |
| 690 | Locker locker; |
| 691 | Context::Scope context_scope(evaluation_context_); |
| 692 | for (int i = 1; i < argc; i++) { |
| 693 | char* str = argv[i]; |
| 694 | if (strcmp(str, "--shell") == 0) { |
| 695 | run_shell = true; |
| 696 | } else if (strcmp(str, "--preemption") == 0) { |
| 697 | use_preemption = true; |
| 698 | } else if (strcmp(str, "--no-preemption") == 0) { |
| 699 | use_preemption = false; |
| 700 | } else if (strcmp(str, "--preemption-interval") == 0) { |
| 701 | if (i + 1 < argc) { |
| 702 | char* end = NULL; |
| 703 | preemption_interval = strtol(argv[++i], &end, 10); // NOLINT |
| 704 | if (preemption_interval <= 0 || *end != '\0' || errno == ERANGE) { |
| 705 | printf("Invalid value for --preemption-interval '%s'\n", argv[i]); |
| 706 | return 1; |
| 707 | } |
| 708 | } else { |
| 709 | printf("Missing value for --preemption-interval\n"); |
| 710 | return 1; |
| 711 | } |
| 712 | } else if (strcmp(str, "-f") == 0) { |
| 713 | // Ignore any -f flags for compatibility with other stand-alone |
| 714 | // JavaScript engines. |
| 715 | continue; |
| 716 | } else if (strncmp(str, "--", 2) == 0) { |
| 717 | printf("Warning: unknown flag %s.\nTry --help for options\n", str); |
| 718 | } else if (strcmp(str, "-e") == 0 && i + 1 < argc) { |
| 719 | // Execute argument given to -e option directly. |
| 720 | v8::HandleScope handle_scope; |
| 721 | v8::Handle<v8::String> file_name = v8::String::New("unnamed"); |
| 722 | v8::Handle<v8::String> source = v8::String::New(argv[i + 1]); |
| 723 | if (!ExecuteString(source, file_name, false, true)) { |
| 724 | OnExit(); |
| 725 | return 1; |
| 726 | } |
| 727 | i++; |
| 728 | } else if (strcmp(str, "-p") == 0 && i + 1 < argc) { |
| 729 | int size = 0; |
| 730 | const char* files = ReadChars(argv[++i], &size); |
| 731 | if (files == NULL) return 1; |
| 732 | ShellThread* thread = |
| 733 | new ShellThread(threads.length(), |
| 734 | i::Vector<const char>(files, size)); |
| 735 | thread->Start(); |
| 736 | threads.Add(thread); |
| 737 | } else { |
| 738 | // Use all other arguments as names of files to load and run. |
| 739 | HandleScope handle_scope; |
| 740 | Handle<String> file_name = v8::String::New(str); |
| 741 | Handle<String> source = ReadFile(str); |
| 742 | if (source.IsEmpty()) { |
| 743 | printf("Error reading '%s'\n", str); |
| 744 | return 1; |
| 745 | } |
| 746 | if (!ExecuteString(source, file_name, false, true)) { |
| 747 | OnExit(); |
| 748 | return 1; |
| 749 | } |
| 750 | } |
| 751 | } |
| 752 | |
| 753 | // Start preemption if threads have been created and preemption is enabled. |
| 754 | if (threads.length() > 0 && use_preemption) { |
| 755 | Locker::StartPreemption(preemption_interval); |
| 756 | } |
| 757 | |
| 758 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 759 | // Run the remote debugger if requested. |
| 760 | if (i::FLAG_remote_debugger) { |
| 761 | RunRemoteDebugger(i::FLAG_debugger_port); |
| 762 | return 0; |
| 763 | } |
| 764 | #endif |
| 765 | } |
| 766 | if (run_shell) |
| 767 | RunShell(); |
| 768 | for (int i = 0; i < threads.length(); i++) { |
| 769 | i::Thread* thread = threads[i]; |
| 770 | thread->Join(); |
| 771 | delete thread; |
| 772 | } |
| 773 | OnExit(); |
| 774 | return 0; |
| 775 | } |
| 776 | |
| 777 | |
| 778 | } // namespace v8 |
| 779 | |
| 780 | |
| 781 | int main(int argc, char* argv[]) { |
| 782 | return v8::Shell::Main(argc, argv); |
| 783 | } |