erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 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 | |
ulan@chromium.org | 57ff881 | 2013-05-10 08:16:55 +0000 | [diff] [blame^] | 28 | // TODO(dcarney): remove |
| 29 | #define V8_ALLOW_ACCESS_TO_RAW_HANDLE_CONSTRUCTOR |
| 30 | #define V8_ALLOW_ACCESS_TO_PERSISTENT_IMPLICIT |
| 31 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 32 | #include <v8.h> |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 33 | |
yangguo@chromium.org | 99aa490 | 2012-07-06 16:21:55 +0000 | [diff] [blame] | 34 | #ifdef ENABLE_DEBUGGER_SUPPORT |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 35 | #include <v8-debug.h> |
yangguo@chromium.org | 99aa490 | 2012-07-06 16:21:55 +0000 | [diff] [blame] | 36 | #endif // ENABLE_DEBUGGER_SUPPORT |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 37 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 38 | #include <fcntl.h> |
| 39 | #include <string.h> |
| 40 | #include <stdio.h> |
| 41 | #include <stdlib.h> |
| 42 | |
| 43 | /** |
| 44 | * This sample program should demonstrate certain aspects of debugging |
| 45 | * standalone V8-based application. |
| 46 | * |
| 47 | * The program reads input stream, processes it line by line and print |
| 48 | * the result to output. The actual processing is done by custom JavaScript |
| 49 | * script. The script is specified with command line parameters. |
| 50 | * |
| 51 | * The main cycle of the program will sequentially read lines from standard |
| 52 | * input, process them and print to standard output until input closes. |
| 53 | * There are 2 possible configuration in regard to main cycle. |
| 54 | * |
| 55 | * 1. The main cycle is on C++ side. Program should be run with |
| 56 | * --main-cycle-in-cpp option. Script must declare a function named |
| 57 | * "ProcessLine". The main cycle in C++ reads lines and calls this function |
| 58 | * for processing every time. This is a sample script: |
| 59 | |
| 60 | function ProcessLine(input_line) { |
| 61 | return ">>>" + input_line + "<<<"; |
| 62 | } |
| 63 | |
| 64 | * |
| 65 | * 2. The main cycle is in JavaScript. Program should be run with |
| 66 | * --main-cycle-in-js option. Script gets run one time at all and gets |
| 67 | * API of 2 global functions: "read_line" and "print". It should read input |
| 68 | * and print converted lines to output itself. This a sample script: |
| 69 | |
| 70 | while (true) { |
| 71 | var line = read_line(); |
| 72 | if (!line) { |
| 73 | break; |
| 74 | } |
| 75 | var res = line + " | " + line; |
| 76 | print(res); |
| 77 | } |
| 78 | |
| 79 | * |
| 80 | * When run with "-p" argument, the program starts V8 Debugger Agent and |
| 81 | * allows remote debugger to attach and debug JavaScript code. |
| 82 | * |
| 83 | * Interesting aspects: |
| 84 | * 1. Wait for remote debugger to attach |
| 85 | * Normally the program compiles custom script and immediately runs it. |
| 86 | * If programmer needs to debug script from the very beginning, he should |
| 87 | * run this sample program with "--wait-for-connection" command line parameter. |
| 88 | * This way V8 will suspend on the first statement and wait for |
| 89 | * debugger to attach. |
| 90 | * |
| 91 | * 2. Unresponsive V8 |
| 92 | * V8 Debugger Agent holds a connection with remote debugger, but it does |
| 93 | * respond only when V8 is running some script. In particular, when this program |
| 94 | * is waiting for input, all requests from debugger get deferred until V8 |
| 95 | * is called again. See how "--callback" command-line parameter in this sample |
| 96 | * fixes this issue. |
| 97 | */ |
| 98 | |
| 99 | enum MainCycleType { |
| 100 | CycleInCpp, |
| 101 | CycleInJs |
| 102 | }; |
| 103 | |
| 104 | const char* ToCString(const v8::String::Utf8Value& value); |
svenpanne@chromium.org | 2bda543 | 2013-03-15 12:39:50 +0000 | [diff] [blame] | 105 | void ReportException(v8::Isolate* isolate, v8::TryCatch* handler); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 106 | v8::Handle<v8::String> ReadFile(const char* name); |
| 107 | v8::Handle<v8::String> ReadLine(); |
| 108 | |
| 109 | v8::Handle<v8::Value> Print(const v8::Arguments& args); |
| 110 | v8::Handle<v8::Value> ReadLine(const v8::Arguments& args); |
svenpanne@chromium.org | 2bda543 | 2013-03-15 12:39:50 +0000 | [diff] [blame] | 111 | bool RunCppCycle(v8::Handle<v8::Script> script, |
| 112 | v8::Local<v8::Context> context, |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 113 | bool report_exceptions); |
| 114 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 115 | |
yangguo@chromium.org | 99aa490 | 2012-07-06 16:21:55 +0000 | [diff] [blame] | 116 | #ifdef ENABLE_DEBUGGER_SUPPORT |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 117 | v8::Persistent<v8::Context> debug_message_context; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 118 | |
| 119 | void DispatchDebugMessages() { |
| 120 | // We are in some random thread. We should already have v8::Locker acquired |
| 121 | // (we requested this when registered this callback). We was called |
| 122 | // because new debug messages arrived; they may have already been processed, |
| 123 | // but we shouldn't worry about this. |
| 124 | // |
| 125 | // All we have to do is to set context and call ProcessDebugMessages. |
| 126 | // |
| 127 | // We should decide which V8 context to use here. This is important for |
| 128 | // "evaluate" command, because it must be executed some context. |
| 129 | // In our sample we have only one context, so there is nothing really to |
| 130 | // think about. |
ulan@chromium.org | 57ff881 | 2013-05-10 08:16:55 +0000 | [diff] [blame^] | 131 | v8::Isolate* isolate = v8::Isolate::GetCurrent(); |
| 132 | v8::HandleScope handle_scope(isolate); |
| 133 | v8::Context::Scope scope(isolate, debug_message_context); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 134 | |
| 135 | v8::Debug::ProcessDebugMessages(); |
| 136 | } |
yangguo@chromium.org | 99aa490 | 2012-07-06 16:21:55 +0000 | [diff] [blame] | 137 | #endif // ENABLE_DEBUGGER_SUPPORT |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 138 | |
| 139 | |
| 140 | int RunMain(int argc, char* argv[]) { |
| 141 | v8::V8::SetFlagsFromCommandLine(&argc, argv, true); |
svenpanne@chromium.org | 2bda543 | 2013-03-15 12:39:50 +0000 | [diff] [blame] | 142 | v8::Isolate* isolate = v8::Isolate::GetCurrent(); |
| 143 | v8::HandleScope handle_scope(isolate); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 144 | |
ulan@chromium.org | 57ff881 | 2013-05-10 08:16:55 +0000 | [diff] [blame^] | 145 | v8::Handle<v8::String> script_source; |
| 146 | v8::Handle<v8::Value> script_name; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 147 | int script_param_counter = 0; |
| 148 | |
yangguo@chromium.org | 99aa490 | 2012-07-06 16:21:55 +0000 | [diff] [blame] | 149 | #ifdef ENABLE_DEBUGGER_SUPPORT |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 150 | int port_number = -1; |
| 151 | bool wait_for_connection = false; |
| 152 | bool support_callback = false; |
yangguo@chromium.org | 99aa490 | 2012-07-06 16:21:55 +0000 | [diff] [blame] | 153 | #endif // ENABLE_DEBUGGER_SUPPORT |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 154 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 155 | MainCycleType cycle_type = CycleInCpp; |
| 156 | |
| 157 | for (int i = 1; i < argc; i++) { |
| 158 | const char* str = argv[i]; |
| 159 | if (strcmp(str, "-f") == 0) { |
| 160 | // Ignore any -f flags for compatibility with the other stand- |
| 161 | // alone JavaScript engines. |
| 162 | continue; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 163 | } else if (strcmp(str, "--main-cycle-in-cpp") == 0) { |
| 164 | cycle_type = CycleInCpp; |
| 165 | } else if (strcmp(str, "--main-cycle-in-js") == 0) { |
| 166 | cycle_type = CycleInJs; |
yangguo@chromium.org | 99aa490 | 2012-07-06 16:21:55 +0000 | [diff] [blame] | 167 | #ifdef ENABLE_DEBUGGER_SUPPORT |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 168 | } else if (strcmp(str, "--callback") == 0) { |
| 169 | support_callback = true; |
| 170 | } else if (strcmp(str, "--wait-for-connection") == 0) { |
| 171 | wait_for_connection = true; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 172 | } else if (strcmp(str, "-p") == 0 && i + 1 < argc) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 173 | port_number = atoi(argv[i + 1]); // NOLINT |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 174 | i++; |
yangguo@chromium.org | 99aa490 | 2012-07-06 16:21:55 +0000 | [diff] [blame] | 175 | #endif // ENABLE_DEBUGGER_SUPPORT |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 176 | } else if (strncmp(str, "--", 2) == 0) { |
| 177 | printf("Warning: unknown flag %s.\nTry --help for options\n", str); |
| 178 | } else if (strcmp(str, "-e") == 0 && i + 1 < argc) { |
| 179 | script_source = v8::String::New(argv[i + 1]); |
| 180 | script_name = v8::String::New("unnamed"); |
| 181 | i++; |
| 182 | script_param_counter++; |
| 183 | } else { |
| 184 | // Use argument as a name of file to load. |
| 185 | script_source = ReadFile(str); |
| 186 | script_name = v8::String::New(str); |
| 187 | if (script_source.IsEmpty()) { |
| 188 | printf("Error reading '%s'\n", str); |
| 189 | return 1; |
| 190 | } |
| 191 | script_param_counter++; |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | if (script_param_counter == 0) { |
| 196 | printf("Script is not specified\n"); |
| 197 | return 1; |
| 198 | } |
| 199 | if (script_param_counter != 1) { |
| 200 | printf("Only one script may be specified\n"); |
| 201 | return 1; |
| 202 | } |
| 203 | |
| 204 | // Create a template for the global object. |
| 205 | v8::Handle<v8::ObjectTemplate> global = v8::ObjectTemplate::New(); |
| 206 | |
| 207 | // Bind the global 'print' function to the C++ Print callback. |
| 208 | global->Set(v8::String::New("print"), v8::FunctionTemplate::New(Print)); |
| 209 | |
| 210 | if (cycle_type == CycleInJs) { |
| 211 | // Bind the global 'read_line' function to the C++ Print callback. |
| 212 | global->Set(v8::String::New("read_line"), |
| 213 | v8::FunctionTemplate::New(ReadLine)); |
| 214 | } |
| 215 | |
| 216 | // Create a new execution environment containing the built-in |
| 217 | // functions |
ulan@chromium.org | 57ff881 | 2013-05-10 08:16:55 +0000 | [diff] [blame^] | 218 | v8::Handle<v8::Context> context = v8::Context::New(isolate, NULL, global); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 219 | // Enter the newly created execution environment. |
| 220 | v8::Context::Scope context_scope(context); |
| 221 | |
yangguo@chromium.org | 99aa490 | 2012-07-06 16:21:55 +0000 | [diff] [blame] | 222 | #ifdef ENABLE_DEBUGGER_SUPPORT |
mvstanton@chromium.org | d16d853 | 2013-01-25 13:29:10 +0000 | [diff] [blame] | 223 | debug_message_context = |
svenpanne@chromium.org | 2bda543 | 2013-03-15 12:39:50 +0000 | [diff] [blame] | 224 | v8::Persistent<v8::Context>::New(isolate, context); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 225 | |
svenpanne@chromium.org | 2bda543 | 2013-03-15 12:39:50 +0000 | [diff] [blame] | 226 | v8::Locker locker(isolate); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 227 | |
| 228 | if (support_callback) { |
| 229 | v8::Debug::SetDebugMessageDispatchHandler(DispatchDebugMessages, true); |
| 230 | } |
| 231 | |
| 232 | if (port_number != -1) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 233 | v8::Debug::EnableAgent("lineprocessor", port_number, wait_for_connection); |
| 234 | } |
yangguo@chromium.org | 99aa490 | 2012-07-06 16:21:55 +0000 | [diff] [blame] | 235 | #endif // ENABLE_DEBUGGER_SUPPORT |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 236 | |
| 237 | bool report_exceptions = true; |
| 238 | |
| 239 | v8::Handle<v8::Script> script; |
| 240 | { |
| 241 | // Compile script in try/catch context. |
| 242 | v8::TryCatch try_catch; |
| 243 | script = v8::Script::Compile(script_source, script_name); |
| 244 | if (script.IsEmpty()) { |
| 245 | // Print errors that happened during compilation. |
| 246 | if (report_exceptions) |
svenpanne@chromium.org | 2bda543 | 2013-03-15 12:39:50 +0000 | [diff] [blame] | 247 | ReportException(isolate, &try_catch); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 248 | return 1; |
| 249 | } |
| 250 | } |
| 251 | |
| 252 | { |
| 253 | v8::TryCatch try_catch; |
| 254 | |
| 255 | script->Run(); |
| 256 | if (try_catch.HasCaught()) { |
| 257 | if (report_exceptions) |
svenpanne@chromium.org | 2bda543 | 2013-03-15 12:39:50 +0000 | [diff] [blame] | 258 | ReportException(isolate, &try_catch); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 259 | return 1; |
| 260 | } |
| 261 | } |
| 262 | |
| 263 | if (cycle_type == CycleInCpp) { |
svenpanne@chromium.org | 2bda543 | 2013-03-15 12:39:50 +0000 | [diff] [blame] | 264 | bool res = RunCppCycle(script, |
| 265 | v8::Context::GetCurrent(), |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 266 | report_exceptions); |
| 267 | return !res; |
| 268 | } else { |
| 269 | // All is already done. |
| 270 | } |
| 271 | return 0; |
| 272 | } |
| 273 | |
| 274 | |
svenpanne@chromium.org | 2bda543 | 2013-03-15 12:39:50 +0000 | [diff] [blame] | 275 | bool RunCppCycle(v8::Handle<v8::Script> script, |
| 276 | v8::Local<v8::Context> context, |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 277 | bool report_exceptions) { |
svenpanne@chromium.org | 2bda543 | 2013-03-15 12:39:50 +0000 | [diff] [blame] | 278 | v8::Isolate* isolate = context->GetIsolate(); |
yangguo@chromium.org | 99aa490 | 2012-07-06 16:21:55 +0000 | [diff] [blame] | 279 | #ifdef ENABLE_DEBUGGER_SUPPORT |
svenpanne@chromium.org | 2bda543 | 2013-03-15 12:39:50 +0000 | [diff] [blame] | 280 | v8::Locker lock(isolate); |
yangguo@chromium.org | 99aa490 | 2012-07-06 16:21:55 +0000 | [diff] [blame] | 281 | #endif // ENABLE_DEBUGGER_SUPPORT |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 282 | |
| 283 | v8::Handle<v8::String> fun_name = v8::String::New("ProcessLine"); |
svenpanne@chromium.org | 2bda543 | 2013-03-15 12:39:50 +0000 | [diff] [blame] | 284 | v8::Handle<v8::Value> process_val = context->Global()->Get(fun_name); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 285 | |
| 286 | // If there is no Process function, or if it is not a function, |
| 287 | // bail out |
| 288 | if (!process_val->IsFunction()) { |
| 289 | printf("Error: Script does not declare 'ProcessLine' global function.\n"); |
| 290 | return 1; |
| 291 | } |
| 292 | |
| 293 | // It is a function; cast it to a Function |
| 294 | v8::Handle<v8::Function> process_fun = |
| 295 | v8::Handle<v8::Function>::Cast(process_val); |
| 296 | |
| 297 | |
| 298 | while (!feof(stdin)) { |
svenpanne@chromium.org | 2bda543 | 2013-03-15 12:39:50 +0000 | [diff] [blame] | 299 | v8::HandleScope handle_scope(isolate); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 300 | |
| 301 | v8::Handle<v8::String> input_line = ReadLine(); |
| 302 | if (input_line == v8::Undefined()) { |
| 303 | continue; |
| 304 | } |
| 305 | |
| 306 | const int argc = 1; |
| 307 | v8::Handle<v8::Value> argv[argc] = { input_line }; |
| 308 | |
| 309 | v8::Handle<v8::Value> result; |
| 310 | { |
| 311 | v8::TryCatch try_catch; |
| 312 | result = process_fun->Call(v8::Context::GetCurrent()->Global(), |
| 313 | argc, argv); |
| 314 | if (try_catch.HasCaught()) { |
| 315 | if (report_exceptions) |
svenpanne@chromium.org | 2bda543 | 2013-03-15 12:39:50 +0000 | [diff] [blame] | 316 | ReportException(isolate, &try_catch); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 317 | return false; |
| 318 | } |
| 319 | } |
| 320 | v8::String::Utf8Value str(result); |
| 321 | const char* cstr = ToCString(str); |
| 322 | printf("%s\n", cstr); |
| 323 | } |
| 324 | |
| 325 | return true; |
| 326 | } |
| 327 | |
| 328 | int main(int argc, char* argv[]) { |
| 329 | int result = RunMain(argc, argv); |
| 330 | v8::V8::Dispose(); |
| 331 | return result; |
| 332 | } |
| 333 | |
| 334 | |
| 335 | // Extracts a C string from a V8 Utf8Value. |
| 336 | const char* ToCString(const v8::String::Utf8Value& value) { |
| 337 | return *value ? *value : "<string conversion failed>"; |
| 338 | } |
| 339 | |
| 340 | |
| 341 | // Reads a file into a v8 string. |
| 342 | v8::Handle<v8::String> ReadFile(const char* name) { |
| 343 | FILE* file = fopen(name, "rb"); |
| 344 | if (file == NULL) return v8::Handle<v8::String>(); |
| 345 | |
| 346 | fseek(file, 0, SEEK_END); |
| 347 | int size = ftell(file); |
| 348 | rewind(file); |
| 349 | |
| 350 | char* chars = new char[size + 1]; |
| 351 | chars[size] = '\0'; |
| 352 | for (int i = 0; i < size;) { |
yangguo@chromium.org | 5a11aaf | 2012-06-20 11:29:00 +0000 | [diff] [blame] | 353 | int read = static_cast<int>(fread(&chars[i], 1, size - i, file)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 354 | i += read; |
| 355 | } |
| 356 | fclose(file); |
| 357 | v8::Handle<v8::String> result = v8::String::New(chars, size); |
| 358 | delete[] chars; |
| 359 | return result; |
| 360 | } |
| 361 | |
| 362 | |
svenpanne@chromium.org | 2bda543 | 2013-03-15 12:39:50 +0000 | [diff] [blame] | 363 | void ReportException(v8::Isolate* isolate, v8::TryCatch* try_catch) { |
| 364 | v8::HandleScope handle_scope(isolate); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 365 | v8::String::Utf8Value exception(try_catch->Exception()); |
| 366 | const char* exception_string = ToCString(exception); |
| 367 | v8::Handle<v8::Message> message = try_catch->Message(); |
| 368 | if (message.IsEmpty()) { |
| 369 | // V8 didn't provide any extra information about this error; just |
| 370 | // print the exception. |
| 371 | printf("%s\n", exception_string); |
| 372 | } else { |
| 373 | // Print (filename):(line number): (message). |
| 374 | v8::String::Utf8Value filename(message->GetScriptResourceName()); |
| 375 | const char* filename_string = ToCString(filename); |
| 376 | int linenum = message->GetLineNumber(); |
| 377 | printf("%s:%i: %s\n", filename_string, linenum, exception_string); |
| 378 | // Print line of source code. |
| 379 | v8::String::Utf8Value sourceline(message->GetSourceLine()); |
| 380 | const char* sourceline_string = ToCString(sourceline); |
| 381 | printf("%s\n", sourceline_string); |
| 382 | // Print wavy underline (GetUnderline is deprecated). |
| 383 | int start = message->GetStartColumn(); |
| 384 | for (int i = 0; i < start; i++) { |
| 385 | printf(" "); |
| 386 | } |
| 387 | int end = message->GetEndColumn(); |
| 388 | for (int i = start; i < end; i++) { |
| 389 | printf("^"); |
| 390 | } |
| 391 | printf("\n"); |
| 392 | } |
| 393 | } |
| 394 | |
| 395 | |
| 396 | // The callback that is invoked by v8 whenever the JavaScript 'print' |
| 397 | // function is called. Prints its arguments on stdout separated by |
| 398 | // spaces and ending with a newline. |
| 399 | v8::Handle<v8::Value> Print(const v8::Arguments& args) { |
| 400 | bool first = true; |
| 401 | for (int i = 0; i < args.Length(); i++) { |
svenpanne@chromium.org | 2bda543 | 2013-03-15 12:39:50 +0000 | [diff] [blame] | 402 | v8::HandleScope handle_scope(args.GetIsolate()); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 403 | if (first) { |
| 404 | first = false; |
| 405 | } else { |
| 406 | printf(" "); |
| 407 | } |
| 408 | v8::String::Utf8Value str(args[i]); |
| 409 | const char* cstr = ToCString(str); |
| 410 | printf("%s", cstr); |
| 411 | } |
| 412 | printf("\n"); |
| 413 | fflush(stdout); |
| 414 | return v8::Undefined(); |
| 415 | } |
| 416 | |
| 417 | |
| 418 | // The callback that is invoked by v8 whenever the JavaScript 'read_line' |
| 419 | // function is called. Reads a string from standard input and returns. |
| 420 | v8::Handle<v8::Value> ReadLine(const v8::Arguments& args) { |
| 421 | if (args.Length() > 0) { |
| 422 | return v8::ThrowException(v8::String::New("Unexpected arguments")); |
| 423 | } |
| 424 | return ReadLine(); |
| 425 | } |
| 426 | |
| 427 | v8::Handle<v8::String> ReadLine() { |
| 428 | const int kBufferSize = 1024 + 1; |
| 429 | char buffer[kBufferSize]; |
| 430 | |
| 431 | char* res; |
| 432 | { |
yangguo@chromium.org | 99aa490 | 2012-07-06 16:21:55 +0000 | [diff] [blame] | 433 | #ifdef ENABLE_DEBUGGER_SUPPORT |
yangguo@chromium.org | 46a2a51 | 2013-01-18 16:29:40 +0000 | [diff] [blame] | 434 | v8::Unlocker unlocker(v8::Isolate::GetCurrent()); |
yangguo@chromium.org | 99aa490 | 2012-07-06 16:21:55 +0000 | [diff] [blame] | 435 | #endif // ENABLE_DEBUGGER_SUPPORT |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 436 | res = fgets(buffer, kBufferSize, stdin); |
| 437 | } |
| 438 | if (res == NULL) { |
| 439 | v8::Handle<v8::Primitive> t = v8::Undefined(); |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 440 | return v8::Handle<v8::String>(v8::String::Cast(*t)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 441 | } |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 442 | // Remove newline char |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 443 | for (char* pos = buffer; *pos != '\0'; pos++) { |
| 444 | if (*pos == '\n') { |
| 445 | *pos = '\0'; |
| 446 | break; |
| 447 | } |
| 448 | } |
| 449 | return v8::String::New(buffer); |
| 450 | } |