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| 1 // Copyright 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 |
| 29 #include "d8.h" |
| 30 #include "d8-debug.h" |
| 31 |
| 32 |
| 33 namespace v8 { |
| 34 |
| 35 |
| 36 void HandleDebugEvent(DebugEvent event, |
| 37 Handle<Object> exec_state, |
| 38 Handle<Object> event_data, |
| 39 Handle<Value> data) { |
| 40 HandleScope scope; |
| 41 |
| 42 // Currently only handles break and exception events. |
| 43 if (event != Break && event != Exception) return; |
| 44 |
| 45 TryCatch try_catch; |
| 46 |
| 47 // Print the event details. |
| 48 Handle<String> details = Shell::DebugEventToText(event_data); |
| 49 String::Utf8Value str(details); |
| 50 printf("%s\n", *str); |
| 51 |
| 52 // Get the debug command processor. |
| 53 Local<String> fun_name = String::New("debugCommandProcessor"); |
| 54 Local<Function> fun = Function::Cast(*exec_state->Get(fun_name)); |
| 55 Local<Object> cmd_processor = |
| 56 Object::Cast(*fun->Call(exec_state, 0, NULL)); |
| 57 if (try_catch.HasCaught()) { |
| 58 Shell::ReportException(&try_catch); |
| 59 return; |
| 60 } |
| 61 |
| 62 static const int kBufferSize = 256; |
| 63 bool running = false; |
| 64 while (!running) { |
| 65 char command[kBufferSize]; |
| 66 printf("dbg> "); |
| 67 char* str = fgets(command, kBufferSize, stdin); |
| 68 if (str == NULL) break; |
| 69 |
| 70 // Ignore empty commands. |
| 71 if (strlen(command) == 0) continue; |
| 72 |
| 73 TryCatch try_catch; |
| 74 |
| 75 // Convert the debugger command to a JSON debugger request. |
| 76 Handle<Value> request = |
| 77 Shell::DebugCommandToJSONRequest(String::New(command)); |
| 78 if (try_catch.HasCaught()) { |
| 79 Shell::ReportException(&try_catch); |
| 80 continue; |
| 81 } |
| 82 |
| 83 // If undefined is returned the command was handled internally and there is |
| 84 // no JSON to send. |
| 85 if (request->IsUndefined()) { |
| 86 continue; |
| 87 } |
| 88 |
| 89 Handle<String> fun_name; |
| 90 Handle<Function> fun; |
| 91 // All the functions used below take one argument. |
| 92 static const int kArgc = 1; |
| 93 Handle<Value> args[kArgc]; |
| 94 |
| 95 // Invoke the JavaScript to convert the debug command line to a JSON |
| 96 // request, invoke the JSON request and convert the JSON respose to a text |
| 97 // representation. |
| 98 fun_name = String::New("processDebugRequest"); |
| 99 fun = Handle<Function>::Cast(cmd_processor->Get(fun_name)); |
| 100 args[0] = request; |
| 101 Handle<Value> response_val = fun->Call(cmd_processor, kArgc, args); |
| 102 if (try_catch.HasCaught()) { |
| 103 Shell::ReportException(&try_catch); |
| 104 continue; |
| 105 } |
| 106 Handle<String> response = Handle<String>::Cast(response_val); |
| 107 |
| 108 // Convert the debugger response into text details and the running state. |
| 109 Handle<Object> response_details = Shell::DebugResponseDetails(response); |
| 110 if (try_catch.HasCaught()) { |
| 111 Shell::ReportException(&try_catch); |
| 112 continue; |
| 113 } |
| 114 String::Utf8Value text_str(response_details->Get(String::New("text"))); |
| 115 if (text_str.length() > 0) { |
| 116 printf("%s\n", *text_str); |
| 117 } |
| 118 running = |
| 119 response_details->Get(String::New("running"))->ToBoolean()->Value(); |
| 120 } |
| 121 } |
| 122 |
| 123 |
| 124 } // namespace v8 |
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