The Tor Browser: js/jsd/jsd_scpt.cpp@b8a032363ba2 (annotated)

js/jsd/jsd_scpt.cpp@b8a032363ba2 (annotated)

js/jsd/jsd_scpt.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
  * vim: set ts=8 sts=4 et sw=4 tw=99:
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 /*
  * JavaScript Debugging support - Script support
  */
 #include "jsd.h"
 #include "jsfriendapi.h"
 #include "nsCxPusher.h"
 using mozilla::AutoSafeJSContext;
 /* Comment this out to disable (NT specific) dumping as we go */
 /*
 ** #ifdef DEBUG
 ** #define JSD_DUMP 1
 ** #endif
 */
 #define NOT_SET_YET -1
 /***************************************************************************/
 #ifdef DEBUG
 void JSD_ASSERT_VALID_SCRIPT(JSDScript* jsdscript)
 {
     MOZ_ASSERT(jsdscript);
     MOZ_ASSERT(jsdscript->script);
 }
 void JSD_ASSERT_VALID_EXEC_HOOK(JSDExecHook* jsdhook)
 {
     MOZ_ASSERT(jsdhook);
     MOZ_ASSERT(jsdhook->hook);
 }
 #endif
 static JSDScript*
 _newJSDScript(JSDContext*  jsdc,
               JSContext    *cx,
               JSScript     *script_)
 {
     JS::RootedScript script(cx, script_);
     if ( JS_GetScriptIsSelfHosted(script) )
         return nullptr;
     JSDScript*  jsdscript;
     unsigned     lineno;
     const char* raw_filename;
     MOZ_ASSERT(JSD_SCRIPTS_LOCKED(jsdc));
     /* these are inlined javascript: urls and we can't handle them now */
     lineno = (unsigned) JS_GetScriptBaseLineNumber(cx, script);
     if( lineno == 0 )
         return nullptr;
     jsdscript = (JSDScript*) calloc(1, sizeof(JSDScript));
     if( ! jsdscript )
         return nullptr;
     raw_filename = JS_GetScriptFilename(script);
     JS_HashTableAdd(jsdc->scriptsTable, (void *)script, (void *)jsdscript);
     JS_APPEND_LINK(&jsdscript->links, &jsdc->scripts);
     jsdscript->jsdc         = jsdc;
     jsdscript->script       = script;
     jsdscript->lineBase     = lineno;
     jsdscript->lineExtent   = (unsigned)NOT_SET_YET;
     jsdscript->data         = nullptr;
     jsdscript->url          = (char*) jsd_BuildNormalizedURL(raw_filename);
     JS_INIT_CLIST(&jsdscript->hooks);
     return jsdscript;
 }
 static void
 _destroyJSDScript(JSDContext*  jsdc,
                   JSDScript*   jsdscript)
 {
     MOZ_ASSERT(JSD_SCRIPTS_LOCKED(jsdc));
     /* destroy all hooks */
     jsd_ClearAllExecutionHooksForScript(jsdc, jsdscript);
     JS_REMOVE_LINK(&jsdscript->links);
     if(jsdscript->url)
         free(jsdscript->url);
     if (jsdscript->profileData)
         free(jsdscript->profileData);
     free(jsdscript);
 }
 /***************************************************************************/
 #ifdef JSD_DUMP
 #ifndef XP_WIN
 void
 OutputDebugString (char *buf)
 {
     fprintf (stderr, "%s", buf);
 }
 #endif
 static void
 _dumpJSDScript(JSDContext* jsdc, JSDScript* jsdscript, const char* leadingtext)
 {
     const char* name;
     JSString* fun;
     unsigned base;
     unsigned extent;
     char Buf[256];
     size_t n;
     name   = jsd_GetScriptFilename(jsdc, jsdscript);
     fun    = jsd_GetScriptFunctionId(jsdc, jsdscript);
     base   = jsd_GetScriptBaseLineNumber(jsdc, jsdscript);
     extent = jsd_GetScriptLineExtent(jsdc, jsdscript);
     n = size_t(snprintf(Buf, sizeof(Buf), "%sscript=%08X, %s, ",
                         leadingtext, (unsigned) jsdscript->script,
                         name ? name : "no URL"));
     if (n + 1 < sizeof(Buf)) {
         if (fun) {
             n += size_t(snprintf(Buf + n, sizeof(Buf) - n, "%s", "no fun"));
         } else {
             n += JS_PutEscapedFlatString(Buf + n, sizeof(Buf) - n,
                                          MOZ_ASSERT_STRING_IS_FLAT(fun), 0);
             Buf[sizeof(Buf) - 1] = '\0';
         }
         if (n + 1 < sizeof(Buf))
             snprintf(Buf + n, sizeof(Buf) - n, ", %d-%d\n", base, base + extent - 1);
     }
     OutputDebugString( Buf );
 }
 static void
 _dumpJSDScriptList( JSDContext* jsdc )
 {
     JSDScript* iterp = nullptr;
     JSDScript* jsdscript = nullptr;
     OutputDebugString( "*** JSDScriptDump\n" );
     while( nullptr != (jsdscript = jsd_IterateScripts(jsdc, &iterp)) )
         _dumpJSDScript( jsdc, jsdscript, "  script: " );
 }
 #endif /* JSD_DUMP */
 /***************************************************************************/
 static JSHashNumber
 jsd_hash_script(const void *key)
 {
     return ((JSHashNumber)(ptrdiff_t) key) >> 2; /* help lame MSVC1.5 on Win16 */
 }
 static void *
 jsd_alloc_script_table(void *priv, size_t size)
 {
     return malloc(size);
 }
 static void
 jsd_free_script_table(void *priv, void *item, size_t size)
 {
     free(item);
 }
 static JSHashEntry *
 jsd_alloc_script_entry(void *priv, const void *item)
 {
     return (JSHashEntry*) malloc(sizeof(JSHashEntry));
 }
 static void
 jsd_free_script_entry(void *priv, JSHashEntry *he, unsigned flag)
 {
     if (flag == HT_FREE_ENTRY)
     {
         _destroyJSDScript((JSDContext*) priv, (JSDScript*) he->value);
         free(he);
     }
 }
 static const JSHashAllocOps script_alloc_ops = {
     jsd_alloc_script_table, jsd_free_script_table,
     jsd_alloc_script_entry, jsd_free_script_entry
 };
 #ifndef JSD_SCRIPT_HASH_SIZE
 #define JSD_SCRIPT_HASH_SIZE 1024
 #endif
 bool
 jsd_InitScriptManager(JSDContext* jsdc)
 {
     JS_INIT_CLIST(&jsdc->scripts);
     jsdc->scriptsTable = JS_NewHashTable(JSD_SCRIPT_HASH_SIZE, jsd_hash_script,
                                          JS_CompareValues, JS_CompareValues,
                                          &script_alloc_ops, (void*) jsdc);
     return !!jsdc->scriptsTable;
 }
 void
 jsd_DestroyScriptManager(JSDContext* jsdc)
 {
     JSD_LOCK_SCRIPTS(jsdc);
     if (jsdc->scriptsTable)
         JS_HashTableDestroy(jsdc->scriptsTable);
     JSD_UNLOCK_SCRIPTS(jsdc);
 }
 JSDScript*
 jsd_FindJSDScript( JSDContext*  jsdc,
                    JSScript     *script )
 {
     MOZ_ASSERT(JSD_SCRIPTS_LOCKED(jsdc));
     return (JSDScript*) JS_HashTableLookup(jsdc->scriptsTable, (void *)script);
 }
 JSDScript *
 jsd_FindOrCreateJSDScript(JSDContext    *jsdc,
                           JSContext     *cx,
                           JSScript      *script_,
                           JSAbstractFramePtr frame)
 {
     JS::RootedScript script(cx, script_);
     JSDScript *jsdscript;
     MOZ_ASSERT(JSD_SCRIPTS_LOCKED(jsdc));
     jsdscript = jsd_FindJSDScript(jsdc, script);
     if (jsdscript)
         return jsdscript;
     /* Fallback for unknown scripts: create a new script. */
     if (!frame) {
         JSBrokenFrameIterator iter(cx);
         if (!iter.done())
             frame = iter.abstractFramePtr();
     }
     if (frame)
         jsdscript = _newJSDScript(jsdc, cx, script);
     return jsdscript;
 }
 JSDProfileData*
 jsd_GetScriptProfileData(JSDContext* jsdc, JSDScript *script)
 {
     if (!script->profileData)
         script->profileData = (JSDProfileData*)calloc(1, sizeof(JSDProfileData));
     return script->profileData;
 }
 uint32_t
 jsd_GetScriptFlags(JSDContext *jsdc, JSDScript *script)
 {
     return script->flags;
 }
 void
 jsd_SetScriptFlags(JSDContext *jsdc, JSDScript *script, uint32_t flags)
 {
     script->flags = flags;
 }
 unsigned
 jsd_GetScriptCallCount(JSDContext* jsdc, JSDScript *script)
 {
     if (script->profileData)
         return script->profileData->callCount;
     return 0;
 }
 unsigned
 jsd_GetScriptMaxRecurseDepth(JSDContext* jsdc, JSDScript *script)
 {
     if (script->profileData)
         return script->profileData->maxRecurseDepth;
     return 0;
 }
 double
 jsd_GetScriptMinExecutionTime(JSDContext* jsdc, JSDScript *script)
 {
     if (script->profileData)
         return script->profileData->minExecutionTime;
     return 0.0;
 }
 double
 jsd_GetScriptMaxExecutionTime(JSDContext* jsdc, JSDScript *script)
 {
     if (script->profileData)
         return script->profileData->maxExecutionTime;
     return 0.0;
 }
 double
 jsd_GetScriptTotalExecutionTime(JSDContext* jsdc, JSDScript *script)
 {
     if (script->profileData)
         return script->profileData->totalExecutionTime;
     return 0.0;
 }
 double
 jsd_GetScriptMinOwnExecutionTime(JSDContext* jsdc, JSDScript *script)
 {
     if (script->profileData)
         return script->profileData->minOwnExecutionTime;
     return 0.0;
 }
 double
 jsd_GetScriptMaxOwnExecutionTime(JSDContext* jsdc, JSDScript *script)
 {
     if (script->profileData)
         return script->profileData->maxOwnExecutionTime;
     return 0.0;
 }
 double
 jsd_GetScriptTotalOwnExecutionTime(JSDContext* jsdc, JSDScript *script)
 {
     if (script->profileData)
         return script->profileData->totalOwnExecutionTime;
     return 0.0;
 }
 void
 jsd_ClearScriptProfileData(JSDContext* jsdc, JSDScript *script)
 {
     if (script->profileData)
     {
         free(script->profileData);
         script->profileData = nullptr;
     }
 }
 JSScript *
 jsd_GetJSScript (JSDContext *jsdc, JSDScript *script)
 {
     return script->script;
 }
 JSFunction *
 jsd_GetJSFunction (JSDContext *jsdc, JSDScript *script)
 {
     AutoSafeJSContext cx;
     return JS_GetScriptFunction(cx, script->script);
 }
 JSDScript*
 jsd_IterateScripts(JSDContext* jsdc, JSDScript **iterp)
 {
     JSDScript *jsdscript = *iterp;
     MOZ_ASSERT(JSD_SCRIPTS_LOCKED(jsdc));
     if( !jsdscript )
         jsdscript = (JSDScript *)jsdc->scripts.next;
     if( jsdscript == (JSDScript *)&jsdc->scripts )
         return nullptr;
     *iterp = (JSDScript*) jsdscript->links.next;
     return jsdscript;
 }
 void *
 jsd_SetScriptPrivate(JSDScript *jsdscript, void *data)
 {
     void *rval = jsdscript->data;
     jsdscript->data = data;
     return rval;
 }
 void *
 jsd_GetScriptPrivate(JSDScript *jsdscript)
 {
     return jsdscript->data;
 }
 bool
 jsd_IsActiveScript(JSDContext* jsdc, JSDScript *jsdscript)
 {
     JSDScript *current;
     MOZ_ASSERT(JSD_SCRIPTS_LOCKED(jsdc));
     for( current = (JSDScript *)jsdc->scripts.next;
          current != (JSDScript *)&jsdc->scripts;
          current = (JSDScript *)current->links.next )
     {
         if(jsdscript == current)
             return true;
     }
     return false;
 }
 const char*
 jsd_GetScriptFilename(JSDContext* jsdc, JSDScript *jsdscript)
 {
     return jsdscript->url;
 }
 JSString*
 jsd_GetScriptFunctionId(JSDContext* jsdc, JSDScript *jsdscript)
 {
     JSString* str;
     JSFunction *fun = jsd_GetJSFunction(jsdc, jsdscript);
     if( ! fun )
         return nullptr;
     str = JS_GetFunctionId(fun);
     /* For compatibility we return "anonymous", not an empty string here. */
     return str ? str : JS_GetAnonymousString(jsdc->jsrt);
 }
 unsigned
 jsd_GetScriptBaseLineNumber(JSDContext* jsdc, JSDScript *jsdscript)
 {
     return jsdscript->lineBase;
 }
 unsigned
 jsd_GetScriptLineExtent(JSDContext* jsdc, JSDScript *jsdscript)
 {
     AutoSafeJSContext cx;
     JSAutoCompartment ac(cx, jsdc->glob); // Just in case.
     if( NOT_SET_YET == (int)jsdscript->lineExtent )
         jsdscript->lineExtent = JS_GetScriptLineExtent(cx, jsdscript->script);
     return jsdscript->lineExtent;
 }
 uintptr_t
 jsd_GetClosestPC(JSDContext* jsdc, JSDScript* jsdscript, unsigned line)
 {
     uintptr_t pc;
     if( !jsdscript )
         return 0;
     AutoSafeJSContext cx;
     JSAutoCompartment ac(cx, jsdscript->script);
     pc = (uintptr_t) JS_LineNumberToPC(cx, jsdscript->script, line );
     return pc;
 }
 unsigned
 jsd_GetClosestLine(JSDContext* jsdc, JSDScript* jsdscript, uintptr_t pc)
 {
     unsigned first = jsdscript->lineBase;
     unsigned last = first + jsd_GetScriptLineExtent(jsdc, jsdscript) - 1;
     unsigned line = 0;
     if (pc) {
         AutoSafeJSContext cx;
         JSAutoCompartment ac(cx, jsdscript->script);
         line = JS_PCToLineNumber(cx, jsdscript->script, (jsbytecode*)pc);
     }
     if( line < first )
         return first;
     if( line > last )
         return last;
     return line;
 }
 bool
 jsd_GetLinePCs(JSDContext* jsdc, JSDScript* jsdscript,
                unsigned startLine, unsigned maxLines,
                unsigned* count, unsigned** retLines, uintptr_t** retPCs)
 {
     unsigned first = jsdscript->lineBase;
     unsigned last = first + jsd_GetScriptLineExtent(jsdc, jsdscript) - 1;
     bool ok;
     jsbytecode **pcs;
     unsigned i;
     if (last < startLine)
         return true;
     AutoSafeJSContext cx;
     JSAutoCompartment ac(cx, jsdscript->script);
     ok = JS_GetLinePCs(cx, jsdscript->script,
                        startLine, maxLines,
                        count, retLines, &pcs);
     if (ok) {
         if (retPCs) {
             for (i = 0; i < *count; ++i) {
                 (*retPCs)[i] = (*pcs)[i];
             }
         }
         JS_free(cx, pcs);
     }
     return ok;
 }
 bool
 jsd_SetScriptHook(JSDContext* jsdc, JSD_ScriptHookProc hook, void* callerdata)
 {
     JSD_LOCK();
     jsdc->scriptHook = hook;
     jsdc->scriptHookData = callerdata;
     JSD_UNLOCK();
     return true;
 }
 bool
 jsd_GetScriptHook(JSDContext* jsdc, JSD_ScriptHookProc* hook, void** callerdata)
 {
     JSD_LOCK();
     if( hook )
         *hook = jsdc->scriptHook;
     if( callerdata )
         *callerdata = jsdc->scriptHookData;
     JSD_UNLOCK();
     return true;
 }
 bool
 jsd_EnableSingleStepInterrupts(JSDContext* jsdc, JSDScript* jsdscript, bool enable)
 {
     bool rv;
     AutoSafeJSContext cx;
     JS::RootedScript script(cx, jsdscript->script);
     JSAutoCompartment ac(cx, script);
     JSD_LOCK();
     rv = JS_SetSingleStepMode(cx, script, enable);
     JSD_UNLOCK();
     return rv;
 }
 /***************************************************************************/
 void
 jsd_NewScriptHookProc(
                 JSContext   *cx,
                 const char  *filename,      /* URL this script loads from */
                 unsigned       lineno,         /* line where this script starts */
                 JSScript    *script,
                 JSFunction  *fun,
                 void*       callerdata )
 {
     JSDScript* jsdscript = nullptr;
     JSDContext* jsdc = (JSDContext*) callerdata;
     JSD_ScriptHookProc      hook;
     void*                   hookData;
     JSD_ASSERT_VALID_CONTEXT(jsdc);
     if( JSD_IS_DANGEROUS_THREAD(jsdc) )
         return;
     JSD_LOCK_SCRIPTS(jsdc);
     jsdscript = _newJSDScript(jsdc, cx, script);
     JSD_UNLOCK_SCRIPTS(jsdc);
     if( ! jsdscript )
         return;
 #ifdef JSD_DUMP
     JSD_LOCK_SCRIPTS(jsdc);
     _dumpJSDScript(jsdc, jsdscript, "***NEW Script: ");
     _dumpJSDScriptList( jsdc );
     JSD_UNLOCK_SCRIPTS(jsdc);
 #endif /* JSD_DUMP */
     /* local in case jsdc->scriptHook gets cleared on another thread */
     JSD_LOCK();
     hook = jsdc->scriptHook;
     if( hook )
         jsdscript->flags = jsdscript->flags | JSD_SCRIPT_CALL_DESTROY_HOOK_BIT;
     hookData = jsdc->scriptHookData;
     JSD_UNLOCK();
     if( hook )
         hook(jsdc, jsdscript, true, hookData);
 }
 void
 jsd_DestroyScriptHookProc(
                 JSFreeOp    *fop,
                 JSScript    *script_,
                 void*       callerdata )
 {
     JSDScript* jsdscript = nullptr;
     JSDContext* jsdc = (JSDContext*) callerdata;
     // NB: We're called during GC, so we can't push a cx. Root directly with
     // the runtime.
     JS::RootedScript script(jsdc->jsrt, script_);
     JSD_ScriptHookProc      hook;
     void*                   hookData;
     JSD_ASSERT_VALID_CONTEXT(jsdc);
     if( JSD_IS_DANGEROUS_THREAD(jsdc) )
         return;
     JSD_LOCK_SCRIPTS(jsdc);
     jsdscript = jsd_FindJSDScript(jsdc, script);
     JSD_UNLOCK_SCRIPTS(jsdc);
     if( ! jsdscript )
         return;
 #ifdef JSD_DUMP
     JSD_LOCK_SCRIPTS(jsdc);
     _dumpJSDScript(jsdc, jsdscript, "***DESTROY Script: ");
     JSD_UNLOCK_SCRIPTS(jsdc);
 #endif /* JSD_DUMP */
     /* local in case hook gets cleared on another thread */
     JSD_LOCK();
     hook = (jsdscript->flags & JSD_SCRIPT_CALL_DESTROY_HOOK_BIT) ? jsdc->scriptHook
                                                                  : nullptr;
     hookData = jsdc->scriptHookData;
     JSD_UNLOCK();
     if( hook )
         hook(jsdc, jsdscript, false, hookData);
     JSD_LOCK_SCRIPTS(jsdc);
     JS_HashTableRemove(jsdc->scriptsTable, (void *)script);
     JSD_UNLOCK_SCRIPTS(jsdc);
 #ifdef JSD_DUMP
     JSD_LOCK_SCRIPTS(jsdc);
     _dumpJSDScriptList(jsdc);
     JSD_UNLOCK_SCRIPTS(jsdc);
 #endif /* JSD_DUMP */
 }
 /***************************************************************************/
 static JSDExecHook*
 _findHook(JSDContext* jsdc, JSDScript* jsdscript, uintptr_t pc)
 {
     JSDExecHook* jsdhook;
     JSCList* list = &jsdscript->hooks;
     for( jsdhook = (JSDExecHook*)list->next;
          jsdhook != (JSDExecHook*)list;
          jsdhook = (JSDExecHook*)jsdhook->links.next )
     {
         if (jsdhook->pc == pc)
             return jsdhook;
     }
     return nullptr;
 }
 static bool
 _isActiveHook(JSDContext* jsdc, JSScript *script, JSDExecHook* jsdhook)
 {
     JSDExecHook* current;
     JSCList* list;
     JSDScript* jsdscript;
     JSD_LOCK_SCRIPTS(jsdc);
     jsdscript = jsd_FindJSDScript(jsdc, script);
     if( ! jsdscript)
     {
         JSD_UNLOCK_SCRIPTS(jsdc);
         return false;
     }
     list = &jsdscript->hooks;
     for( current = (JSDExecHook*)list->next;
          current != (JSDExecHook*)list;
          current = (JSDExecHook*)current->links.next )
     {
         if(current == jsdhook)
         {
             JSD_UNLOCK_SCRIPTS(jsdc);
             return true;
         }
     }
     JSD_UNLOCK_SCRIPTS(jsdc);
     return false;
 }
 JSTrapStatus
 jsd_TrapHandler(JSContext *cx, JSScript *script_, jsbytecode *pc, jsval *rval,
                 jsval closure)
 {
     JS::RootedScript script(cx, script_);
     JSDExecHook* jsdhook = (JSDExecHook*) JSVAL_TO_PRIVATE(closure);
     JSD_ExecutionHookProc hook;
     void* hookData;
     JSDContext*  jsdc;
     JSD_LOCK();
     if( nullptr == (jsdc = jsd_JSDContextForJSContext(cx)) ||
         ! _isActiveHook(jsdc, script, jsdhook) )
     {
         JSD_UNLOCK();
         return JSTRAP_CONTINUE;
     }
     JSD_ASSERT_VALID_EXEC_HOOK(jsdhook);
     MOZ_ASSERT(!jsdhook->pc || jsdhook->pc == (uintptr_t)pc);
     MOZ_ASSERT(jsdhook->jsdscript->script == script);
     MOZ_ASSERT(jsdhook->jsdscript->jsdc == jsdc);
     hook = jsdhook->hook;
     hookData = jsdhook->callerdata;
     /* do not use jsdhook-> after this point */
     JSD_UNLOCK();
     if( ! jsdc || ! jsdc->inited )
         return JSTRAP_CONTINUE;
     if( JSD_IS_DANGEROUS_THREAD(jsdc) )
         return JSTRAP_CONTINUE;
     return jsd_CallExecutionHook(jsdc, cx, JSD_HOOK_BREAKPOINT,
                                  hook, hookData, rval);
 }
 bool
 jsd_SetExecutionHook(JSDContext*           jsdc,
                      JSDScript*            jsdscript,
                      uintptr_t             pc,
                      JSD_ExecutionHookProc hook,
                      void*                 callerdata)
 {
     JSDExecHook* jsdhook;
     bool rv;
     JSD_LOCK();
     if( ! hook )
     {
         jsd_ClearExecutionHook(jsdc, jsdscript, pc);
         JSD_UNLOCK();
         return true;
     }
     jsdhook = _findHook(jsdc, jsdscript, pc);
     if( jsdhook )
     {
         jsdhook->hook       = hook;
         jsdhook->callerdata = callerdata;
         JSD_UNLOCK();
         return true;
     }
     /* else... */
     jsdhook = (JSDExecHook*)calloc(1, sizeof(JSDExecHook));
     if( ! jsdhook ) {
         JSD_UNLOCK();
         return false;
     }
     jsdhook->jsdscript  = jsdscript;
     jsdhook->pc         = pc;
     jsdhook->hook       = hook;
     jsdhook->callerdata = callerdata;
     {
         AutoSafeJSContext cx;
         JSAutoCompartment ac(cx, jsdscript->script);
         JS::RootedScript script(cx, jsdscript->script);
         JS::RootedValue hookValue(cx, PRIVATE_TO_JSVAL(jsdhook));
         rv = JS_SetTrap(cx, script, (jsbytecode*)pc, jsd_TrapHandler, hookValue);
     }
     if ( ! rv ) {
         free(jsdhook);
         JSD_UNLOCK();
         return false;
     }
     JS_APPEND_LINK(&jsdhook->links, &jsdscript->hooks);
     JSD_UNLOCK();
     return true;
 }
 bool
 jsd_ClearExecutionHook(JSDContext*           jsdc,
                        JSDScript*            jsdscript,
                        uintptr_t             pc)
 {
     JSDExecHook* jsdhook;
     JSD_LOCK();
     jsdhook = _findHook(jsdc, jsdscript, pc);
     if( ! jsdhook )
     {
         JSD_UNLOCK();
         return false;
     }
     {
         AutoSafeJSContext cx;
         JSAutoCompartment ac(cx, jsdscript->script);
         JS_ClearTrap(cx, jsdscript->script,
                      (jsbytecode*)pc, nullptr, nullptr);
     }
     JS_REMOVE_LINK(&jsdhook->links);
     free(jsdhook);
     JSD_UNLOCK();
     return true;
 }
 bool
 jsd_ClearAllExecutionHooksForScript(JSDContext* jsdc, JSDScript* jsdscript)
 {
     JSDExecHook* jsdhook;
     JSCList* list = &jsdscript->hooks;
     JSD_LOCK();
     while( (JSDExecHook*)list != (jsdhook = (JSDExecHook*)list->next) )
     {
         JS_REMOVE_LINK(&jsdhook->links);
         free(jsdhook);
     }
     JS_ClearScriptTraps(jsdc->jsrt, jsdscript->script);
     JSD_UNLOCK();
     return true;
 }
 bool
 jsd_ClearAllExecutionHooks(JSDContext* jsdc)
 {
     JSDScript* jsdscript;
     JSDScript* iterp = nullptr;
     JSD_LOCK();
     while( nullptr != (jsdscript = jsd_IterateScripts(jsdc, &iterp)) )
         jsd_ClearAllExecutionHooksForScript(jsdc, jsdscript);
     JSD_UNLOCK();
     return true;
 }
 void
 jsd_ScriptCreated(JSDContext* jsdc,
                   JSContext   *cx,
                   const char  *filename,    /* URL this script loads from */
                   unsigned       lineno,       /* line where this script starts */
                   JSScript    *script,
                   JSFunction  *fun)
 {
     jsd_NewScriptHookProc(cx, filename, lineno, script, fun, jsdc);
 }
 void
 jsd_ScriptDestroyed(JSDContext* jsdc,
                     JSFreeOp    *fop,
                     JSScript    *script)
 {
     jsd_DestroyScriptHookProc(fop, script, jsdc);
 }

The Tor Browser / annotate

js/jsd/jsd_scpt.cpp@b8a032363ba2 (annotated)

js/jsd/jsd_scpt.cpp