Mercurial > spidermonkey-playground

annotate spidermonkey-playground.cpp @ 58:0b66a265df13

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Fixed some bugs that raised assertions in debug builds of SpiderMonkey.
author Atul Varma <varmaa@toolness.com>
date Wed, 24 Jun 2009 21:15:45 -0700
parents 8750e9ecf3af
children 4910bc49a182
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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18
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1 /* ***** BEGIN LICENSE BLOCK *****
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2 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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3 *
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4 * The contents of this file are subject to the Mozilla Public License Version
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5 * 1.1 (the "License"); you may not use this file except in compliance with
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6 * the License. You may obtain a copy of the License at
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7 * http://www.mozilla.org/MPL/
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8 *
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9 * Software distributed under the License is distributed on an "AS IS" basis,
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10 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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11 * for the specific language governing rights and limitations under the
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12 * License.
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13 *
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14 * The Original Code is Ubiquity.
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15 *
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16 * The Initial Developer of the Original Code is Mozilla.
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17 * Portions created by the Initial Developer are Copyright (C) 2007
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18 * the Initial Developer. All Rights Reserved.
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19 *
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20 * Contributor(s):
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21 * Atul Varma <atul@mozilla.com>
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22 *
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23 * Alternatively, the contents of this file may be used under the terms of
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24 * either the GNU General Public License Version 2 or later (the "GPL"), or
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25 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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26 * in which case the provisions of the GPL or the LGPL are applicable instead
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27 * of those above. If you wish to allow use of your version of this file only
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28 * under the terms of either the GPL or the LGPL, and not to allow others to
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29 * use your version of this file under the terms of the MPL, indicate your
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30 * decision by deleting the provisions above and replace them with the notice
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31 * and other provisions required by the GPL or the LGPL. If you do not delete
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32 * the provisions above, a recipient may use your version of this file under
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33 * the terms of any one of the MPL, the GPL or the LGPL.
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34 *
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35 * ***** END LICENSE BLOCK ***** */
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36
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37 // This file is based on the code in the JSAPI User Guide:
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38 //
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39 // https://developer.mozilla.org/En/SpiderMonkey/JSAPI_User_Guide
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40
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41 #include "string.h"
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42 #include "jsapi.h"
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43 #include "jsdbgapi.h"
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44
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45 #include "wrapper.h"
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46 #include "server_socket.h"
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47 #include "memory_profiler.h"
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48
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49 // The name of our JS script containing our Trusted Code Base (TCB).
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50 #define TCB_FILENAME "tcb.js"
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51
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52 // Global references to our TCB.
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53 static JSContext *tcb_cx;
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54 static JSObject *tcb_global;
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55
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56 // TODO: Make sure we're rooting objects appropriately here so that
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57 // the interpreter doesn't randomly crash or something.
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58
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59 /* The class of the global object. */
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60 JSClass global_class = {
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61 "global", JSCLASS_GLOBAL_FLAGS,
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62 JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_PropertyStub,
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63 JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, JS_FinalizeStub,
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64 JSCLASS_NO_OPTIONAL_MEMBERS
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65 };
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66
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67 // This native JS function prints the given string to the console.
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68
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69 static JSBool print(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
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70 jsval *rval)
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71 {
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72 char *str;
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73
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74 if (!JS_ConvertArguments(cx, argc, argv, "s", &str))
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75 return JS_FALSE;
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76
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77 printf("%s\n", str);
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78
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79 return JS_TRUE;
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80 }
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81
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82 // This native JS function forces garbage collection.
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83
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84 static JSBool forceGC(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
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85 jsval *rval)
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86 {
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87 JS_GC(cx);
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88 return JS_TRUE;
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89 }
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90
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91 // This native JS function is an implementation of the SecurableModule
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92 // require() function. For more information, see:
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93 //
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94 // https://wiki.mozilla.org/ServerJS/Modules/SecurableModules
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95 //
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96 // The function takes two parameters: a filename to import, and a JS
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97 // object containing objects to export into the module. The latter is
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98 // accessible from the loaded module via a global called 'imports'.
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99 //
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100 // This function returns the SecurableModule's 'exports' global.
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101
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102 static JSBool require(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
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103 jsval *rval)
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104 {
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105 char *filename;
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106 JSObject *exports;
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107
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108 if (!JS_ConvertArguments(cx, argc, argv, "so", &filename, &exports))
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109 return JS_FALSE;
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110
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111 FILE *f = fopen(filename, "r");
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112 if (!f) {
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113 JS_ReportError(cx, "File not found");
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114 return JS_FALSE;
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115 }
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116
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117 fseek(f, 0, SEEK_END);
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118 long fileSize = ftell(f);
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119 fseek(f, 0, SEEK_SET);
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120
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121 char source[fileSize];
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122 fread(source, fileSize, 1, f);
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123 fclose(f);
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124
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125 // TODO: Check for return values here.
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126 JSContext *module_cx = JS_NewContext(JS_GetRuntime(cx), 8192);
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127 JSObject *module_global = JS_NewObject(module_cx, &global_class, NULL,
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128 NULL);
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129 JS_InitStandardClasses(module_cx, module_global);
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130 JS_DefineProperty(module_cx, module_global, "imports",
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131 OBJECT_TO_JSVAL(exports), NULL, NULL, 0);
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132 JSObject *module_exports = JS_NewObject(module_cx, NULL, NULL,
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133 module_global);
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134 JS_DefineProperty(module_cx, module_global, "exports",
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135 OBJECT_TO_JSVAL(module_exports), NULL, NULL, 0);
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136
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137 jsval module_rval;
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138 if (!JS_EvaluateScript(module_cx, module_global, source,
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139 strlen(source), filename, 1, &module_rval)) {
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140 JS_DestroyContext(module_cx);
500e267ed094 Added a really simple securableModule require() implementation.
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141 return JS_FALSE;
500e267ed094 Added a really simple securableModule require() implementation.
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142 }
500e267ed094 Added a really simple securableModule require() implementation.
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diff changeset
143
500e267ed094 Added a really simple securableModule require() implementation.
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144 *rval = OBJECT_TO_JSVAL(module_exports);
500e267ed094 Added a really simple securableModule require() implementation.
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diff changeset
145
500e267ed094 Added a really simple securableModule require() implementation.
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diff changeset
146 JS_DestroyContext(module_cx);
500e267ed094 Added a really simple securableModule require() implementation.
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diff changeset
147
500e267ed094 Added a really simple securableModule require() implementation.
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148 return JS_TRUE;
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149 }
500e267ed094 Added a really simple securableModule require() implementation.
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diff changeset
150
33
cb058fac14fa Added an enumerate() function to the TCB global.
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151 // This native JS function is a wrapper for JS_Enumerate().
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152
cb058fac14fa Added an enumerate() function to the TCB global.
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153 static JSBool enumerate(JSContext *cx, JSObject *obj, uintN argc,
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154 jsval *argv, jsval *rval)
cb058fac14fa Added an enumerate() function to the TCB global.
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155 {
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diff changeset
156 JSObject *target;
cb058fac14fa Added an enumerate() function to the TCB global.
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157
cb058fac14fa Added an enumerate() function to the TCB global.
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158 if (!JS_ConvertArguments(cx, argc, argv, "o", &target))
cb058fac14fa Added an enumerate() function to the TCB global.
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159 return JS_FALSE;
cb058fac14fa Added an enumerate() function to the TCB global.
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160
cb058fac14fa Added an enumerate() function to the TCB global.
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161 JSIdArray *ids = JS_Enumerate(cx, target);
cb058fac14fa Added an enumerate() function to the TCB global.
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162
cb058fac14fa Added an enumerate() function to the TCB global.
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diff changeset
163 if (ids == NULL)
cb058fac14fa Added an enumerate() function to the TCB global.
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164 return JS_FALSE;
cb058fac14fa Added an enumerate() function to the TCB global.
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165
cb058fac14fa Added an enumerate() function to the TCB global.
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166 JSObject *array = JS_NewArrayObject(cx, ids->length, ids->vector);
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167 *rval = OBJECT_TO_JSVAL(array);
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168 return JS_TRUE;
cb058fac14fa Added an enumerate() function to the TCB global.
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169 }
cb058fac14fa Added an enumerate() function to the TCB global.
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170
23
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171 // This native JS function looks up the property of an object, bypassing
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172 // security checks and getters/setters.
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173
10
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174 static JSBool lookupProperty(JSContext *cx, JSObject *obj, uintN argc,
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175 jsval *argv, jsval *rval)
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176 {
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177 JSObject *target;
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178
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179 if (argc < 2) {
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180 JS_ReportError(cx, "Must provide id to lookup.");
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181 return JS_FALSE;
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182 }
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183
16a605ff036c The TCB can now define a global checkAccess() handler. It also has access to a lookupProperty() function that can retrieve an attribute of an object without initiating security checks or property getters.
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184 if (!JS_ConvertArguments(cx, argc, argv, "o", &target))
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185 return JS_FALSE;
16a605ff036c The TCB can now define a global checkAccess() handler. It also has access to a lookupProperty() function that can retrieve an attribute of an object without initiating security checks or property getters.
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186
16a605ff036c The TCB can now define a global checkAccess() handler. It also has access to a lookupProperty() function that can retrieve an attribute of an object without initiating security checks or property getters.
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187 return JS_LookupPropertyById(cx, target, argv[1], rval);
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188 }
16a605ff036c The TCB can now define a global checkAccess() handler. It also has access to a lookupProperty() function that can retrieve an attribute of an object without initiating security checks or property getters.
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189
23
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190 // This native JS function returns a JS object containing metadata about
a94e7cc0727a Added some documentation to spidermonkey-playground.cpp.
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191 // the given function.
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192
15
1d73446eef62 added functionInfo() native function.
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193 static JSBool functionInfo(JSContext *cx, JSObject *obj, uintN argc,
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194 jsval *argv, jsval *rval)
1d73446eef62 added functionInfo() native function.
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195 {
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196 JSFunction *func;
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197
1d73446eef62 added functionInfo() native function.
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198 if (!JS_ConvertArguments(cx, argc, argv, "f", &func))
1d73446eef62 added functionInfo() native function.
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199 return JS_FALSE;
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diff changeset
200
1d73446eef62 added functionInfo() native function.
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diff changeset
201 JSScript *script = JS_GetFunctionScript(cx, func);
1d73446eef62 added functionInfo() native function.
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diff changeset
202
1d73446eef62 added functionInfo() native function.
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diff changeset
203 if (script == NULL) {
1d73446eef62 added functionInfo() native function.
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diff changeset
204 *rval = JSVAL_NULL;
1d73446eef62 added functionInfo() native function.
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205 return JS_TRUE;
1d73446eef62 added functionInfo() native function.
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diff changeset
206 }
1d73446eef62 added functionInfo() native function.
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207
1d73446eef62 added functionInfo() native function.
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diff changeset
208 jsval filenameVal = JSVAL_NULL;
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diff changeset
209
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diff changeset
210 const char *filename = JS_GetScriptFilename(cx, script);
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diff changeset
211 if (filename) {
1d73446eef62 added functionInfo() native function.
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diff changeset
212 JSString *filenameStr = JS_NewStringCopyZ(cx, filename);
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213 filenameVal = STRING_TO_JSVAL(filenameStr);
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diff changeset
214 }
1d73446eef62 added functionInfo() native function.
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diff changeset
215
16
36b66c249446 Added some TODOs.
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diff changeset
216 // TODO: Check for return values here.
15
1d73446eef62 added functionInfo() native function.
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217 JSObject *funcInfo = JS_NewObject(cx, NULL, NULL, NULL);
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218 JS_DefineProperty(cx, funcInfo, "filename", filenameVal,
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diff changeset
219 NULL, NULL, 0);
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diff changeset
220
1d73446eef62 added functionInfo() native function.
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diff changeset
221 *rval = OBJECT_TO_JSVAL(funcInfo);
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diff changeset
222 return JS_TRUE;
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diff changeset
223 }
1d73446eef62 added functionInfo() native function.
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diff changeset
224
23
a94e7cc0727a Added some documentation to spidermonkey-playground.cpp.
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diff changeset
225 // This native JS function returns a JS representation of the current
a94e7cc0727a Added some documentation to spidermonkey-playground.cpp.
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diff changeset
226 // state of the stack, starting with the callee's stack frame and going
a94e7cc0727a Added some documentation to spidermonkey-playground.cpp.
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parents: 20
diff changeset
227 // up from there.
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diff changeset
228
4
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diff changeset
229 static JSBool stack(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
71de19be1054 Added a native stack() function.
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diff changeset
230 jsval *rval)
71de19be1054 Added a native stack() function.
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diff changeset
231 {
71de19be1054 Added a native stack() function.
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diff changeset
232 JSStackFrame *iterator = NULL;
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diff changeset
233 JSStackFrame *frame;
71de19be1054 Added a native stack() function.
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parents: 3
diff changeset
234 JSObject *prevFrameInfo = NULL;
71de19be1054 Added a native stack() function.
Atul Varma <varmaa@toolness.com>
parents: 3
diff changeset
235 JSObject *firstFrameInfo = NULL;
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diff changeset
236 bool skippedMyFrame = false;
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diff changeset
237
5
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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diff changeset
238 if (obj == NULL)
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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parents: 4
diff changeset
239 // We're being called from native code, don't skip the topmost frame.
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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diff changeset
240 skippedMyFrame = true;
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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parents: 4
diff changeset
241
4
71de19be1054 Added a native stack() function.
Atul Varma <varmaa@toolness.com>
parents: 3
diff changeset
242 while ((frame = JS_FrameIterator(cx, &iterator)) != NULL) {
71de19be1054 Added a native stack() function.
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parents: 3
diff changeset
243 if (!skippedMyFrame) {
71de19be1054 Added a native stack() function.
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parents: 3
diff changeset
244 skippedMyFrame = true;
71de19be1054 Added a native stack() function.
Atul Varma <varmaa@toolness.com>
parents: 3
diff changeset
245 continue;
71de19be1054 Added a native stack() function.
Atul Varma <varmaa@toolness.com>
parents: 3
diff changeset
246 }
71de19be1054 Added a native stack() function.
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parents: 3
diff changeset
247
71de19be1054 Added a native stack() function.
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parents: 3
diff changeset
248 jsval functionNameVal = JSVAL_NULL;
71de19be1054 Added a native stack() function.
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diff changeset
249 jsval filenameVal = JSVAL_NULL;
71de19be1054 Added a native stack() function.
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diff changeset
250 jsval lineNoVal = JSVAL_ZERO;
12
e14f433f3a58 Function objects are now attached to stack frames returned by stack().
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diff changeset
251 jsval functionObjectVal = JSVAL_NULL;
13
d200a8158bd5 Fixed a bug in the throw hook, added a 'scopeChain' property to stack frames.
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diff changeset
252 jsval scopeChainVal = JSVAL_NULL;
4
71de19be1054 Added a native stack() function.
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diff changeset
253
71de19be1054 Added a native stack() function.
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parents: 3
diff changeset
254 JSFunction *func = JS_GetFrameFunction(cx, frame);
71de19be1054 Added a native stack() function.
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diff changeset
255 if (func) {
71de19be1054 Added a native stack() function.
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parents: 3
diff changeset
256 JSString *functionName = JS_GetFunctionId(func);
71de19be1054 Added a native stack() function.
Atul Varma <varmaa@toolness.com>
parents: 3
diff changeset
257 if (functionName)
71de19be1054 Added a native stack() function.
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parents: 3
diff changeset
258 functionNameVal = STRING_TO_JSVAL(functionName);
71de19be1054 Added a native stack() function.
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parents: 3
diff changeset
259 }
71de19be1054 Added a native stack() function.
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parents: 3
diff changeset
260
71de19be1054 Added a native stack() function.
Atul Varma <varmaa@toolness.com>
parents: 3
diff changeset
261 if (!JS_IsNativeFrame(cx, frame)) {
71de19be1054 Added a native stack() function.
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parents: 3
diff changeset
262 JSScript *script = JS_GetFrameScript(cx, frame);
71de19be1054 Added a native stack() function.
Atul Varma <varmaa@toolness.com>
parents: 3
diff changeset
263 jsbytecode *bytecode = JS_GetFramePC(cx, frame);
71de19be1054 Added a native stack() function.
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parents: 3
diff changeset
264
71de19be1054 Added a native stack() function.
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parents: 3
diff changeset
265 const char *filename = JS_GetScriptFilename(cx, script);
71de19be1054 Added a native stack() function.
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parents: 3
diff changeset
266 if (filename) {
71de19be1054 Added a native stack() function.
Atul Varma <varmaa@toolness.com>
parents: 3
diff changeset
267 JSString *filenameStr = JS_NewStringCopyZ(cx, filename);
71de19be1054 Added a native stack() function.
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diff changeset
268 filenameVal = STRING_TO_JSVAL(filenameStr);
71de19be1054 Added a native stack() function.
Atul Varma <varmaa@toolness.com>
parents: 3
diff changeset
269 }
71de19be1054 Added a native stack() function.
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parents: 3
diff changeset
270
71de19be1054 Added a native stack() function.
Atul Varma <varmaa@toolness.com>
parents: 3
diff changeset
271 uintN lineNo = JS_PCToLineNumber(cx, script, bytecode);
71de19be1054 Added a native stack() function.
Atul Varma <varmaa@toolness.com>
parents: 3
diff changeset
272 lineNoVal = INT_TO_JSVAL(lineNo);
12
e14f433f3a58 Function objects are now attached to stack frames returned by stack().
Atul Varma <varmaa@toolness.com>
parents: 10
diff changeset
273
e14f433f3a58 Function objects are now attached to stack frames returned by stack().
Atul Varma <varmaa@toolness.com>
parents: 10
diff changeset
274 JSObject *functionObject = JS_GetFrameFunctionObject(cx, frame);
e14f433f3a58 Function objects are now attached to stack frames returned by stack().
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parents: 10
diff changeset
275 functionObjectVal = OBJECT_TO_JSVAL(functionObject);
13
d200a8158bd5 Fixed a bug in the throw hook, added a 'scopeChain' property to stack frames.
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parents: 12
diff changeset
276
d200a8158bd5 Fixed a bug in the throw hook, added a 'scopeChain' property to stack frames.
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parents: 12
diff changeset
277 JSObject *scopeChain = JS_GetFrameScopeChain(cx, frame);
d200a8158bd5 Fixed a bug in the throw hook, added a 'scopeChain' property to stack frames.
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diff changeset
278 scopeChainVal = OBJECT_TO_JSVAL(scopeChain);
4
71de19be1054 Added a native stack() function.
Atul Varma <varmaa@toolness.com>
parents: 3
diff changeset
279 }
71de19be1054 Added a native stack() function.
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280
16
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281 // TODO: Check for return values here.
4
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282 JSObject *frameInfo = JS_NewObject(cx, NULL, NULL, NULL);
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283 JS_DefineProperty(cx, frameInfo, "filename", filenameVal,
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284 NULL, NULL, 0);
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285 JS_DefineProperty(cx, frameInfo, "lineNo", lineNoVal,
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286 NULL, NULL, 0);
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287 JS_DefineProperty(cx, frameInfo, "functionName", functionNameVal,
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288 NULL, NULL, 0);
12
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289 JS_DefineProperty(cx, frameInfo, "functionObject", functionObjectVal,
e14f433f3a58 Function objects are now attached to stack frames returned by stack().
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290 NULL, NULL, 0);
13
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291 JS_DefineProperty(cx, frameInfo, "scopeChain", scopeChainVal,
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292 NULL, NULL, 0);
12
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293
4
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diff changeset
294 if (prevFrameInfo)
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295 JS_DefineProperty(cx, prevFrameInfo, "caller",
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296 OBJECT_TO_JSVAL(frameInfo), NULL, NULL, 0);
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297 else
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298 firstFrameInfo = frameInfo;
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299
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300 prevFrameInfo = frameInfo;
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301 }
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302
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303 if (firstFrameInfo)
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304 *rval = OBJECT_TO_JSVAL(firstFrameInfo);
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305 else
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306 *rval = JSVAL_NULL;
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307
71de19be1054 Added a native stack() function.
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308 return JS_TRUE;
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309 }
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310
23
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311 // Our global hook called whenever an exception is thrown saves the current
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312 // exception and stack information to the 'lastException' and
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313 // 'lastExceptionTraceback' globals of the TCB, respectively, much like
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314 // Python's sys.exc_info().
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315
5
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316 static JSTrapStatus throwHook(JSContext *cx, JSScript *script, jsbytecode *pc,
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317 jsval *rval, void *closure)
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318 {
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319 JSObject *tcb_global = (JSObject *) closure;
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320 jsval lastExceptionTraceback;
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321 jsval lastException;
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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322
13
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323 jsval exception = *rval;
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324 if (JS_IsExceptionPending(cx))
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325 if (!JS_GetPendingException(cx, &exception))
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326 printf("Getting exception failed.\n");
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327
5
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328 if (!JS_GetProperty(cx, tcb_global, "lastException", &lastException))
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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329 printf("Unable to retrieve last exception.");
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330
13
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331 if (lastException == exception)
5
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332 // The same exception is just propagating through the stack; keep
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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333 // our existing last-exception info.
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334 return JSTRAP_CONTINUE;
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335
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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336 if (!stack(cx, NULL, 0, NULL, &lastExceptionTraceback)) {
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337 printf("Generation of exception info failed.");
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338 lastExceptionTraceback = JSVAL_NULL;
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339 }
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340
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341 if (!JS_SetProperty(cx, tcb_global, "lastExceptionTraceback",
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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342 &lastExceptionTraceback) ||
8
e14f496e6e08 added a handleError() function to the TCB, which is called whenever an unhandled exception occurs. Also fixed a bug in the setting of lastException.
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343 !JS_SetProperty(cx, tcb_global, "lastException", &exception))
5
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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344 printf("Setting of exception info failed.");
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345
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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346 return JSTRAP_CONTINUE;
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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347 }
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348
23
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349 // Our global checkAccess callback just checks to see if a JS function called
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350 // 'checkAccess' has been defined in the TCB, and delegates to that if so. If
a94e7cc0727a Added some documentation to spidermonkey-playground.cpp.
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351 // not, though, we do a default checkAccess.
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352
9
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diff changeset
353 static JSBool checkAccess(JSContext *cx, JSObject *obj, jsval id,
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354 JSAccessMode mode, jsval *vp)
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355 {
10
16a605ff036c The TCB can now define a global checkAccess() handler. It also has access to a lookupProperty() function that can retrieve an attribute of an object without initiating security checks or property getters.
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356 jsval checkAccess;
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357 if (tcb_global && JS_GetProperty(tcb_cx, tcb_global, "checkAccess",
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358 &checkAccess) &&
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359 JSVAL_IS_OBJECT(checkAccess) &&
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360 JS_ObjectIsFunction(tcb_cx, JSVAL_TO_OBJECT(checkAccess))) {
16a605ff036c The TCB can now define a global checkAccess() handler. It also has access to a lookupProperty() function that can retrieve an attribute of an object without initiating security checks or property getters.
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361 jsval argv[2];
16a605ff036c The TCB can now define a global checkAccess() handler. It also has access to a lookupProperty() function that can retrieve an attribute of an object without initiating security checks or property getters.
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362 argv[0] = OBJECT_TO_JSVAL(obj);
16a605ff036c The TCB can now define a global checkAccess() handler. It also has access to a lookupProperty() function that can retrieve an attribute of an object without initiating security checks or property getters.
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363 argv[1] = id;
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364 return JS_CallFunctionValue(tcb_cx, tcb_global, checkAccess, 2, argv,
16a605ff036c The TCB can now define a global checkAccess() handler. It also has access to a lookupProperty() function that can retrieve an attribute of an object without initiating security checks or property getters.
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diff changeset
365 vp);
9
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366 }
10
16a605ff036c The TCB can now define a global checkAccess() handler. It also has access to a lookupProperty() function that can retrieve an attribute of an object without initiating security checks or property getters.
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diff changeset
367
23
a94e7cc0727a Added some documentation to spidermonkey-playground.cpp.
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parents: 20
diff changeset
368 // TODO: This doesn't work for the 'caller' attribute, and possibly other
a94e7cc0727a Added some documentation to spidermonkey-playground.cpp.
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369 // things too.
9
fcefc3e5a9df Added a runtime access check callback.
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diff changeset
370 return JS_LookupPropertyById(cx, obj, id, vp);
fcefc3e5a9df Added a runtime access check callback.
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371 }
fcefc3e5a9df Added a runtime access check callback.
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diff changeset
372
3
7237a81919b2 Renamed some variables.
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373 static JSFunctionSpec tcb_global_functions[] = {
40
f86740dc5fa0 Added an almost-completely-unimplemented TCP server socket object that uses NSPR.
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374 JS_FS("print", print, 1, 0, 0),
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375 JS_FS("getWrapper", getWrapper, 1, 0, 0),
f86740dc5fa0 Added an almost-completely-unimplemented TCP server socket object that uses NSPR.
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diff changeset
376 JS_FS("unwrap", unwrapObject, 1, 0, 0),
f86740dc5fa0 Added an almost-completely-unimplemented TCP server socket object that uses NSPR.
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diff changeset
377 JS_FS("wrap", wrapObject, 2, 0, 0),
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diff changeset
378 JS_FS("stack", stack, 0, 0, 0),
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diff changeset
379 JS_FS("require", require, 2, 0, 0),
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diff changeset
380 JS_FS("lookupProperty", lookupProperty, 2, 0, 0),
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diff changeset
381 JS_FS("functionInfo", functionInfo, 1, 0, 0),
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diff changeset
382 JS_FS("enumerate", enumerate, 1, 0, 0),
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parents: 39
diff changeset
383 JS_FS("forceGC", forceGC, 0, 0, 0),
50
853f80bd3b4b Added tentative profileMemory() server, which suspends the current JS runtime, creates a new one and runs a web server in it.
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diff changeset
384 JS_FS("profileMemory", profileMemory, 0, 0, 0),
41
f495677654fc renamed Socket to ServerSocket.
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diff changeset
385 JS_FS("ServerSocket", createServerSocket, 0, 0, 0),
1
7444443d2646 added simple script and wrapper.cpp from jetpack
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diff changeset
386 JS_FS_END
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387 };
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diff changeset
388
9
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diff changeset
389 static JSSecurityCallbacks securityCallbacks = {
fcefc3e5a9df Added a runtime access check callback.
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diff changeset
390 checkAccess,
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diff changeset
391 NULL,
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diff changeset
392 NULL
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diff changeset
393 };
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diff changeset
394
0
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395 int main(int argc, const char *argv[])
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diff changeset
396 {
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397 /* JS variables. */
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diff changeset
398 JSRuntime *rt;
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diff changeset
399
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diff changeset
400 /* Create a JS runtime. */
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diff changeset
401 rt = JS_NewRuntime(8L * 1024L * 1024L);
d14fb1d5326c Origination
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402 if (rt == NULL)
d14fb1d5326c Origination
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diff changeset
403 return 1;
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parents:
diff changeset
404
9
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diff changeset
405 JS_SetRuntimeSecurityCallbacks(rt, &securityCallbacks);
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parents: 8
diff changeset
406
0
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diff changeset
407 /* Create a context. */
3
7237a81919b2 Renamed some variables.
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408 tcb_cx = JS_NewContext(rt, 8192);
7237a81919b2 Renamed some variables.
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409 if (tcb_cx == NULL)
0
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410 return 1;
3
7237a81919b2 Renamed some variables.
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411 JS_SetOptions(tcb_cx, JSOPTION_VAROBJFIX);
7237a81919b2 Renamed some variables.
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412 JS_SetVersion(tcb_cx, JSVERSION_LATEST);
0
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413
58
0b66a265df13 Fixed some bugs that raised assertions in debug builds of SpiderMonkey.
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414 JS_BeginRequest(tcb_cx);
0b66a265df13 Fixed some bugs that raised assertions in debug builds of SpiderMonkey.
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415
3
7237a81919b2 Renamed some variables.
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416 /* Create the TCB's global object. */
7237a81919b2 Renamed some variables.
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417 tcb_global = JS_NewObject(tcb_cx, &global_class, NULL, NULL);
7237a81919b2 Renamed some variables.
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418 if (tcb_global == NULL)
0
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419 return 1;
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420
58
0b66a265df13 Fixed some bugs that raised assertions in debug builds of SpiderMonkey.
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421 JS_AddNamedRoot(tcb_cx, &tcb_global, "TCB Global");
51
8750e9ecf3af Added a getGCRoots() function.
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parents: 50
diff changeset
422
3
7237a81919b2 Renamed some variables.
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423 /* Populate the tcb_global object with the standard globals,
0
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424 like Object and Array. */
3
7237a81919b2 Renamed some variables.
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425 if (!JS_InitStandardClasses(tcb_cx, tcb_global))
0
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426 return 1;
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427
3
7237a81919b2 Renamed some variables.
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diff changeset
428 if (!JS_DefineFunctions(tcb_cx, tcb_global, tcb_global_functions))
1
7444443d2646 added simple script and wrapper.cpp from jetpack
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diff changeset
429 return 1;
7444443d2646 added simple script and wrapper.cpp from jetpack
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parents: 0
diff changeset
430
16
36b66c249446 Added some TODOs.
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431 // TODO: Check for return values here.
5
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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432 JS_SetThrowHook(rt, throwHook, tcb_global);
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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433 JS_DefineProperty(tcb_cx, tcb_global, "lastExceptionTraceback", JSVAL_NULL,
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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diff changeset
434 NULL, NULL, 0);
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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parents: 4
diff changeset
435 JS_DefineProperty(tcb_cx, tcb_global, "lastException", JSVAL_NULL,
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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parents: 4
diff changeset
436 NULL, NULL, 0);
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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parents: 4
diff changeset
437
0
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438 /* Your application code here. This may include JSAPI calls
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439 to create your own custom JS objects and run scripts. */
2
1f3e9c8df4f0 Script is now read from tcb.js.
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parents: 1
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440 FILE *f = fopen(TCB_FILENAME, "r");
1f3e9c8df4f0 Script is now read from tcb.js.
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parents: 1
diff changeset
441 if (!f)
1f3e9c8df4f0 Script is now read from tcb.js.
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diff changeset
442 return 1;
39
067371eb9601 The playground now only allocates buffers the size of the JS files being loaded, rather than 100k ones.
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parents: 38
diff changeset
443
067371eb9601 The playground now only allocates buffers the size of the JS files being loaded, rather than 100k ones.
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diff changeset
444 fseek(f, 0, SEEK_END);
067371eb9601 The playground now only allocates buffers the size of the JS files being loaded, rather than 100k ones.
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parents: 38
diff changeset
445 long fileSize = ftell(f);
067371eb9601 The playground now only allocates buffers the size of the JS files being loaded, rather than 100k ones.
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parents: 38
diff changeset
446 fseek(f, 0, SEEK_SET);
2
1f3e9c8df4f0 Script is now read from tcb.js.
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parents: 1
diff changeset
447
39
067371eb9601 The playground now only allocates buffers the size of the JS files being loaded, rather than 100k ones.
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parents: 38
diff changeset
448 char source[fileSize];
067371eb9601 The playground now only allocates buffers the size of the JS files being loaded, rather than 100k ones.
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parents: 38
diff changeset
449 fread(source, fileSize, 1, f);
2
1f3e9c8df4f0 Script is now read from tcb.js.
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parents: 1
diff changeset
450 fclose(f);
1f3e9c8df4f0 Script is now read from tcb.js.
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parents: 1
diff changeset
451
1
7444443d2646 added simple script and wrapper.cpp from jetpack
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parents: 0
diff changeset
452 jsval rval;
3
7237a81919b2 Renamed some variables.
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parents: 2
diff changeset
453 if (!JS_EvaluateScript(tcb_cx, tcb_global, source,
50
853f80bd3b4b Added tentative profileMemory() server, which suspends the current JS runtime, creates a new one and runs a web server in it.
Atul Varma <varmaa@toolness.com>
parents: 41
diff changeset
454 fileSize, TCB_FILENAME, 1,
1
7444443d2646 added simple script and wrapper.cpp from jetpack
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parents: 0
diff changeset
455 &rval)) {
8
e14f496e6e08 added a handleError() function to the TCB, which is called whenever an unhandled exception occurs. Also fixed a bug in the setting of lastException.
Atul Varma <varmaa@toolness.com>
parents: 6
diff changeset
456 jsval handleError;
e14f496e6e08 added a handleError() function to the TCB, which is called whenever an unhandled exception occurs. Also fixed a bug in the setting of lastException.
Atul Varma <varmaa@toolness.com>
parents: 6
diff changeset
457 if (JS_GetProperty(tcb_cx, tcb_global, "handleError", &handleError) &&
e14f496e6e08 added a handleError() function to the TCB, which is called whenever an unhandled exception occurs. Also fixed a bug in the setting of lastException.
Atul Varma <varmaa@toolness.com>
parents: 6
diff changeset
458 JSVAL_IS_OBJECT(handleError) &&
e14f496e6e08 added a handleError() function to the TCB, which is called whenever an unhandled exception occurs. Also fixed a bug in the setting of lastException.
Atul Varma <varmaa@toolness.com>
parents: 6
diff changeset
459 JS_ObjectIsFunction(tcb_cx, JSVAL_TO_OBJECT(handleError))) {
e14f496e6e08 added a handleError() function to the TCB, which is called whenever an unhandled exception occurs. Also fixed a bug in the setting of lastException.
Atul Varma <varmaa@toolness.com>
parents: 6
diff changeset
460 JS_CallFunctionValue(tcb_cx, tcb_global, handleError, 0, NULL, &rval);
e14f496e6e08 added a handleError() function to the TCB, which is called whenever an unhandled exception occurs. Also fixed a bug in the setting of lastException.
Atul Varma <varmaa@toolness.com>
parents: 6
diff changeset
461 }
1
7444443d2646 added simple script and wrapper.cpp from jetpack
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parents: 0
diff changeset
462 return 1;
7444443d2646 added simple script and wrapper.cpp from jetpack
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parents: 0
diff changeset
463 }
0
d14fb1d5326c Origination
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diff changeset
464
d14fb1d5326c Origination
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465 /* Cleanup. */
58
0b66a265df13 Fixed some bugs that raised assertions in debug builds of SpiderMonkey.
Atul Varma <varmaa@toolness.com>
parents: 51
diff changeset
466 JS_RemoveRoot(tcb_cx, &tcb_global);
0b66a265df13 Fixed some bugs that raised assertions in debug builds of SpiderMonkey.
Atul Varma <varmaa@toolness.com>
parents: 51
diff changeset
467 JS_EndRequest(tcb_cx);
3
7237a81919b2 Renamed some variables.
Atul Varma <varmaa@toolness.com>
parents: 2
diff changeset
468 JS_DestroyContext(tcb_cx);
0
d14fb1d5326c Origination
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diff changeset
469 JS_DestroyRuntime(rt);
d14fb1d5326c Origination
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diff changeset
470 JS_ShutDown();
d14fb1d5326c Origination
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diff changeset
471
d14fb1d5326c Origination
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diff changeset
472 printf("Farewell.\n");
d14fb1d5326c Origination
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diff changeset
473 return 0;
d14fb1d5326c Origination
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diff changeset
474 }