The Tor Browser / file comparison
comparison: js/jsd/jsd_high.cpp
js/jsd/jsd_high.cpp
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- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:fae67ee96cc7 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- | |
| 2 * vim: set ts=8 sts=4 et sw=4 tw=99: | |
| 3 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 /* | |
| 8 * JavaScript Debugging support - 'High Level' functions | |
| 9 */ | |
| 10 | |
| 11 #include "jsd.h" | |
| 12 #include "nsCxPusher.h" | |
| 13 | |
| 14 using mozilla::AutoSafeJSContext; | |
| 15 | |
| 16 /***************************************************************************/ | |
| 17 | |
| 18 /* XXX not 'static' because of old Mac CodeWarrior bug */ | |
| 19 JSCList _jsd_context_list = JS_INIT_STATIC_CLIST(&_jsd_context_list); | |
| 20 | |
| 21 /* these are used to connect JSD_SetUserCallbacks() with JSD_DebuggerOn() */ | |
| 22 static JSD_UserCallbacks _callbacks; | |
| 23 static void* _user = nullptr; | |
| 24 static JSRuntime* _jsrt = nullptr; | |
| 25 | |
| 26 #ifdef JSD_HAS_DANGEROUS_THREAD | |
| 27 static void* _dangerousThread = nullptr; | |
| 28 #endif | |
| 29 | |
| 30 #ifdef JSD_THREADSAFE | |
| 31 JSDStaticLock* _jsd_global_lock = nullptr; | |
| 32 #endif | |
| 33 | |
| 34 #ifdef DEBUG | |
| 35 void JSD_ASSERT_VALID_CONTEXT(JSDContext* jsdc) | |
| 36 { | |
| 37 MOZ_ASSERT(jsdc->inited); | |
| 38 MOZ_ASSERT(jsdc->jsrt); | |
| 39 MOZ_ASSERT(jsdc->glob); | |
| 40 } | |
| 41 #endif | |
| 42 | |
| 43 /***************************************************************************/ | |
| 44 /* xpconnect related utility functions implemented in jsd_xpc.cpp */ | |
| 45 | |
| 46 extern void | |
| 47 global_finalize(JSFreeOp* fop, JSObject* obj); | |
| 48 | |
| 49 extern JSObject* | |
| 50 CreateJSDGlobal(JSContext *cx, const JSClass *clasp); | |
| 51 | |
| 52 /***************************************************************************/ | |
| 53 | |
| 54 | |
| 55 static const JSClass global_class = { | |
| 56 "JSDGlobal", JSCLASS_GLOBAL_FLAGS | | |
| 57 JSCLASS_HAS_PRIVATE | JSCLASS_PRIVATE_IS_NSISUPPORTS, | |
| 58 JS_PropertyStub, JS_DeletePropertyStub, JS_PropertyStub, JS_StrictPropertyStub, | |
| 59 JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, global_finalize, | |
| 60 nullptr, nullptr, nullptr, | |
| 61 JS_GlobalObjectTraceHook | |
| 62 }; | |
| 63 | |
| 64 static bool | |
| 65 _validateUserCallbacks(JSD_UserCallbacks* callbacks) | |
| 66 { | |
| 67 return !callbacks || | |
| 68 (callbacks->size && callbacks->size <= sizeof(JSD_UserCallbacks)); | |
| 69 } | |
| 70 | |
| 71 static JSDContext* | |
| 72 _newJSDContext(JSRuntime* jsrt, | |
| 73 JSD_UserCallbacks* callbacks, | |
| 74 void* user, | |
| 75 JSObject* scopeobj) | |
| 76 { | |
| 77 JSDContext* jsdc = nullptr; | |
| 78 bool ok = true; | |
| 79 AutoSafeJSContext cx; | |
| 80 | |
| 81 if( ! jsrt ) | |
| 82 return nullptr; | |
| 83 | |
| 84 if( ! _validateUserCallbacks(callbacks) ) | |
| 85 return nullptr; | |
| 86 | |
| 87 jsdc = (JSDContext*) calloc(1, sizeof(JSDContext)); | |
| 88 if( ! jsdc ) | |
| 89 goto label_newJSDContext_failure; | |
| 90 | |
| 91 if( ! JSD_INIT_LOCKS(jsdc) ) | |
| 92 goto label_newJSDContext_failure; | |
| 93 | |
| 94 JS_INIT_CLIST(&jsdc->links); | |
| 95 | |
| 96 jsdc->jsrt = jsrt; | |
| 97 | |
| 98 if( callbacks ) | |
| 99 memcpy(&jsdc->userCallbacks, callbacks, callbacks->size); | |
| 100 | |
| 101 jsdc->user = user; | |
| 102 | |
| 103 #ifdef JSD_HAS_DANGEROUS_THREAD | |
| 104 jsdc->dangerousThread = _dangerousThread; | |
| 105 #endif | |
| 106 | |
| 107 JS_INIT_CLIST(&jsdc->threadsStates); | |
| 108 JS_INIT_CLIST(&jsdc->sources); | |
| 109 JS_INIT_CLIST(&jsdc->removedSources); | |
| 110 | |
| 111 jsdc->sourceAlterCount = 1; | |
| 112 | |
| 113 if( ! jsd_CreateAtomTable(jsdc) ) | |
| 114 goto label_newJSDContext_failure; | |
| 115 | |
| 116 if( ! jsd_InitObjectManager(jsdc) ) | |
| 117 goto label_newJSDContext_failure; | |
| 118 | |
| 119 if( ! jsd_InitScriptManager(jsdc) ) | |
| 120 goto label_newJSDContext_failure; | |
| 121 | |
| 122 { | |
| 123 JS::RootedObject global(cx, CreateJSDGlobal(cx, &global_class)); | |
| 124 if( ! global ) | |
| 125 goto label_newJSDContext_failure; | |
| 126 | |
| 127 jsdc->glob = global; | |
| 128 | |
| 129 JSAutoCompartment ac(cx, jsdc->glob); | |
| 130 ok = JS::AddNamedObjectRoot(cx, &jsdc->glob, "JSD context global") && | |
| 131 JS_InitStandardClasses(cx, global); | |
| 132 } | |
| 133 if( ! ok ) | |
| 134 goto label_newJSDContext_failure; | |
| 135 | |
| 136 jsdc->data = nullptr; | |
| 137 jsdc->inited = true; | |
| 138 | |
| 139 JSD_LOCK(); | |
| 140 JS_INSERT_LINK(&jsdc->links, &_jsd_context_list); | |
| 141 JSD_UNLOCK(); | |
| 142 | |
| 143 return jsdc; | |
| 144 | |
| 145 label_newJSDContext_failure: | |
| 146 if( jsdc ) { | |
| 147 if ( jsdc->glob ) | |
| 148 JS::RemoveObjectRootRT(JS_GetRuntime(cx), &jsdc->glob); | |
| 149 jsd_DestroyObjectManager(jsdc); | |
| 150 jsd_DestroyAtomTable(jsdc); | |
| 151 free(jsdc); | |
| 152 } | |
| 153 return nullptr; | |
| 154 } | |
| 155 | |
| 156 static void | |
| 157 _destroyJSDContext(JSDContext* jsdc) | |
| 158 { | |
| 159 JSD_ASSERT_VALID_CONTEXT(jsdc); | |
| 160 | |
| 161 JSD_LOCK(); | |
| 162 JS_REMOVE_LINK(&jsdc->links); | |
| 163 JSD_UNLOCK(); | |
| 164 | |
| 165 if ( jsdc->glob ) { | |
| 166 JS::RemoveObjectRootRT(jsdc->jsrt, &jsdc->glob); | |
| 167 } | |
| 168 jsd_DestroyObjectManager(jsdc); | |
| 169 jsd_DestroyAtomTable(jsdc); | |
| 170 | |
| 171 jsdc->inited = false; | |
| 172 | |
| 173 /* | |
| 174 * We should free jsdc here, but we let it leak in case there are any | |
| 175 * asynchronous hooks calling into the system using it as a handle | |
| 176 * | |
| 177 * XXX we also leak the locks | |
| 178 */ | |
| 179 } | |
| 180 | |
| 181 /***************************************************************************/ | |
| 182 | |
| 183 JSDContext* | |
| 184 jsd_DebuggerOnForUser(JSRuntime* jsrt, | |
| 185 JSD_UserCallbacks* callbacks, | |
| 186 void* user, | |
| 187 JSObject* scopeobj) | |
| 188 { | |
| 189 JSDContext* jsdc; | |
| 190 | |
| 191 jsdc = _newJSDContext(jsrt, callbacks, user, scopeobj); | |
| 192 if( ! jsdc ) | |
| 193 return nullptr; | |
| 194 | |
| 195 /* | |
| 196 * Set hooks here. The new/destroy script hooks are on even when | |
| 197 * the debugger is paused. The destroy hook so we'll clean up | |
| 198 * internal data structures when scripts are destroyed, and the | |
| 199 * newscript hook for backwards compatibility for now. We'd like | |
| 200 * to stop doing that. | |
| 201 */ | |
| 202 JS_SetNewScriptHookProc(jsdc->jsrt, jsd_NewScriptHookProc, jsdc); | |
| 203 JS_SetDestroyScriptHookProc(jsdc->jsrt, jsd_DestroyScriptHookProc, jsdc); | |
| 204 jsd_DebuggerUnpause(jsdc); | |
| 205 | |
| 206 if( jsdc->userCallbacks.setContext ) | |
| 207 jsdc->userCallbacks.setContext(jsdc, jsdc->user); | |
| 208 return jsdc; | |
| 209 } | |
| 210 | |
| 211 JSDContext* | |
| 212 jsd_DebuggerOn(void) | |
| 213 { | |
| 214 MOZ_ASSERT(_jsrt); | |
| 215 MOZ_ASSERT(_validateUserCallbacks(&_callbacks)); | |
| 216 return jsd_DebuggerOnForUser(_jsrt, &_callbacks, _user, nullptr); | |
| 217 } | |
| 218 | |
| 219 void | |
| 220 jsd_DebuggerOff(JSDContext* jsdc) | |
| 221 { | |
| 222 jsd_DebuggerPause(jsdc, true); | |
| 223 /* clear hooks here */ | |
| 224 JS_SetNewScriptHookProc(jsdc->jsrt, nullptr, nullptr); | |
| 225 JS_SetDestroyScriptHookProc(jsdc->jsrt, nullptr, nullptr); | |
| 226 | |
| 227 /* clean up */ | |
| 228 JSD_LockScriptSubsystem(jsdc); | |
| 229 jsd_DestroyScriptManager(jsdc); | |
| 230 JSD_UnlockScriptSubsystem(jsdc); | |
| 231 jsd_DestroyAllSources(jsdc); | |
| 232 | |
| 233 _destroyJSDContext(jsdc); | |
| 234 | |
| 235 if( jsdc->userCallbacks.setContext ) | |
| 236 jsdc->userCallbacks.setContext(nullptr, jsdc->user); | |
| 237 } | |
| 238 | |
| 239 void | |
| 240 jsd_DebuggerPause(JSDContext* jsdc, bool forceAllHooksOff) | |
| 241 { | |
| 242 JS_SetDebuggerHandler(jsdc->jsrt, nullptr, nullptr); | |
| 243 if (forceAllHooksOff || !(jsdc->flags & JSD_COLLECT_PROFILE_DATA)) { | |
| 244 JS_SetExecuteHook(jsdc->jsrt, nullptr, nullptr); | |
| 245 JS_SetCallHook(jsdc->jsrt, nullptr, nullptr); | |
| 246 } | |
| 247 JS_SetThrowHook(jsdc->jsrt, nullptr, nullptr); | |
| 248 JS_SetDebugErrorHook(jsdc->jsrt, nullptr, nullptr); | |
| 249 } | |
| 250 | |
| 251 static bool | |
| 252 jsd_DebugErrorHook(JSContext *cx, const char *message, | |
| 253 JSErrorReport *report, void *closure); | |
| 254 | |
| 255 void | |
| 256 jsd_DebuggerUnpause(JSDContext* jsdc) | |
| 257 { | |
| 258 JS_SetDebuggerHandler(jsdc->jsrt, jsd_DebuggerHandler, jsdc); | |
| 259 JS_SetExecuteHook(jsdc->jsrt, jsd_TopLevelCallHook, jsdc); | |
| 260 JS_SetCallHook(jsdc->jsrt, jsd_FunctionCallHook, jsdc); | |
| 261 JS_SetThrowHook(jsdc->jsrt, jsd_ThrowHandler, jsdc); | |
| 262 JS_SetDebugErrorHook(jsdc->jsrt, jsd_DebugErrorHook, jsdc); | |
| 263 } | |
| 264 | |
| 265 void | |
| 266 jsd_SetUserCallbacks(JSRuntime* jsrt, JSD_UserCallbacks* callbacks, void* user) | |
| 267 { | |
| 268 _jsrt = jsrt; | |
| 269 _user = user; | |
| 270 | |
| 271 #ifdef JSD_HAS_DANGEROUS_THREAD | |
| 272 _dangerousThread = JSD_CURRENT_THREAD(); | |
| 273 #endif | |
| 274 | |
| 275 if( callbacks ) | |
| 276 memcpy(&_callbacks, callbacks, sizeof(JSD_UserCallbacks)); | |
| 277 else | |
| 278 memset(&_callbacks, 0 , sizeof(JSD_UserCallbacks)); | |
| 279 } | |
| 280 | |
| 281 void* | |
| 282 jsd_SetContextPrivate(JSDContext* jsdc, void *data) | |
| 283 { | |
| 284 jsdc->data = data; | |
| 285 return data; | |
| 286 } | |
| 287 | |
| 288 void* | |
| 289 jsd_GetContextPrivate(JSDContext* jsdc) | |
| 290 { | |
| 291 return jsdc->data; | |
| 292 } | |
| 293 | |
| 294 void | |
| 295 jsd_ClearAllProfileData(JSDContext* jsdc) | |
| 296 { | |
| 297 JSDScript *current; | |
| 298 | |
| 299 JSD_LOCK_SCRIPTS(jsdc); | |
| 300 current = (JSDScript *)jsdc->scripts.next; | |
| 301 while (current != (JSDScript *)&jsdc->scripts) | |
| 302 { | |
| 303 jsd_ClearScriptProfileData(jsdc, current); | |
| 304 current = (JSDScript *)current->links.next; | |
| 305 } | |
| 306 | |
| 307 JSD_UNLOCK_SCRIPTS(jsdc); | |
| 308 } | |
| 309 | |
| 310 JSDContext* | |
| 311 jsd_JSDContextForJSContext(JSContext* context) | |
| 312 { | |
| 313 JSDContext* iter; | |
| 314 JSDContext* jsdc = nullptr; | |
| 315 JSRuntime* runtime = JS_GetRuntime(context); | |
| 316 | |
| 317 JSD_LOCK(); | |
| 318 for( iter = (JSDContext*)_jsd_context_list.next; | |
| 319 iter != (JSDContext*)&_jsd_context_list; | |
| 320 iter = (JSDContext*)iter->links.next ) | |
| 321 { | |
| 322 if( runtime == iter->jsrt ) | |
| 323 { | |
| 324 jsdc = iter; | |
| 325 break; | |
| 326 } | |
| 327 } | |
| 328 JSD_UNLOCK(); | |
| 329 return jsdc; | |
| 330 } | |
| 331 | |
| 332 static bool | |
| 333 jsd_DebugErrorHook(JSContext *cx, const char *message, | |
| 334 JSErrorReport *report, void *closure) | |
| 335 { | |
| 336 JSDContext* jsdc = (JSDContext*) closure; | |
| 337 JSD_ErrorReporter errorReporter; | |
| 338 void* errorReporterData; | |
| 339 | |
| 340 if( ! jsdc ) | |
| 341 { | |
| 342 MOZ_ASSERT(0); | |
| 343 return true; | |
| 344 } | |
| 345 if( JSD_IS_DANGEROUS_THREAD(jsdc) ) | |
| 346 return true; | |
| 347 | |
| 348 /* local in case hook gets cleared on another thread */ | |
| 349 JSD_LOCK(); | |
| 350 errorReporter = jsdc->errorReporter; | |
| 351 errorReporterData = jsdc->errorReporterData; | |
| 352 JSD_UNLOCK(); | |
| 353 | |
| 354 if(!errorReporter) | |
| 355 return true; | |
| 356 | |
| 357 switch(errorReporter(jsdc, cx, message, report, errorReporterData)) | |
| 358 { | |
| 359 case JSD_ERROR_REPORTER_PASS_ALONG: | |
| 360 return true; | |
| 361 case JSD_ERROR_REPORTER_RETURN: | |
| 362 return false; | |
| 363 case JSD_ERROR_REPORTER_DEBUG: | |
| 364 { | |
| 365 JS::RootedValue rval(cx); | |
| 366 JSD_ExecutionHookProc hook; | |
| 367 void* hookData; | |
| 368 | |
| 369 /* local in case hook gets cleared on another thread */ | |
| 370 JSD_LOCK(); | |
| 371 hook = jsdc->debugBreakHook; | |
| 372 hookData = jsdc->debugBreakHookData; | |
| 373 JSD_UNLOCK(); | |
| 374 | |
| 375 jsd_CallExecutionHook(jsdc, cx, JSD_HOOK_DEBUG_REQUESTED, | |
| 376 hook, hookData, rval.address()); | |
| 377 /* XXX Should make this dependent on ExecutionHook retval */ | |
| 378 return true; | |
| 379 } | |
| 380 case JSD_ERROR_REPORTER_CLEAR_RETURN: | |
| 381 if(report && JSREPORT_IS_EXCEPTION(report->flags)) | |
| 382 JS_ClearPendingException(cx); | |
| 383 return false; | |
| 384 default: | |
| 385 MOZ_ASSERT(0); | |
| 386 break; | |
| 387 } | |
| 388 return true; | |
| 389 } | |
| 390 | |
| 391 bool | |
| 392 jsd_SetErrorReporter(JSDContext* jsdc, | |
| 393 JSD_ErrorReporter reporter, | |
| 394 void* callerdata) | |
| 395 { | |
| 396 JSD_LOCK(); | |
| 397 jsdc->errorReporter = reporter; | |
| 398 jsdc->errorReporterData = callerdata; | |
| 399 JSD_UNLOCK(); | |
| 400 return true; | |
| 401 } | |
| 402 | |
| 403 bool | |
| 404 jsd_GetErrorReporter(JSDContext* jsdc, | |
| 405 JSD_ErrorReporter* reporter, | |
| 406 void** callerdata) | |
| 407 { | |
| 408 JSD_LOCK(); | |
| 409 if( reporter ) | |
| 410 *reporter = jsdc->errorReporter; | |
| 411 if( callerdata ) | |
| 412 *callerdata = jsdc->errorReporterData; | |
| 413 JSD_UNLOCK(); | |
| 414 return true; | |
| 415 } |
