The Tor Browser: js/src/builtin/RegExp.cpp@6474c204b198 (annotated)

js/src/builtin/RegExp.cpp@6474c204b198 (annotated)

js/src/builtin/RegExp.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* -*- 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/. */
 #include "builtin/RegExp.h"
 #include "jscntxt.h"
 #include "vm/RegExpStatics.h"
 #include "vm/StringBuffer.h"
 #include "jsobjinlines.h"
 using namespace js;
 using namespace js::types;
 using mozilla::ArrayLength;
 bool
 js::CreateRegExpMatchResult(JSContext *cx, HandleString input, const MatchPairs &matches,
                             MutableHandleValue rval)
 {
     JS_ASSERT(input);
     /*
      * Create the (slow) result array for a match.
      *
      * Array contents:
      *  0:              matched string
      *  1..pairCount-1: paren matches
      *  input:          input string
      *  index:          start index for the match
      */
     /* Get the templateObject that defines the shape and type of the output object */
     JSObject *templateObject = cx->compartment()->regExps.getOrCreateMatchResultTemplateObject(cx);
     if (!templateObject)
         return false;
     size_t numPairs = matches.length();
     JS_ASSERT(numPairs > 0);
     RootedObject arr(cx, NewDenseAllocatedArrayWithTemplate(cx, numPairs, templateObject));
     if (!arr)
         return false;
     /* Store a Value for each pair. */
     for (size_t i = 0; i < numPairs; i++) {
         const MatchPair &pair = matches[i];
         if (pair.isUndefined()) {
             JS_ASSERT(i != 0); /* Since we had a match, first pair must be present. */
             arr->setDenseInitializedLength(i + 1);
             arr->initDenseElement(i, UndefinedValue());
         } else {
             JSLinearString *str = js_NewDependentString(cx, input, pair.start, pair.length());
             if (!str)
                 return false;
             arr->setDenseInitializedLength(i + 1);
             arr->initDenseElement(i, StringValue(str));
         }
     }
     /* Set the |index| property. (TemplateObject positions it in slot 0) */
     arr->nativeSetSlot(0, Int32Value(matches[0].start));
     /* Set the |input| property. (TemplateObject positions it in slot 1) */
     arr->nativeSetSlot(1, StringValue(input));
 #ifdef DEBUG
     RootedValue test(cx);
     RootedId id(cx, NameToId(cx->names().index));
     if (!baseops::GetProperty(cx, arr, id, &test))
         return false;
     JS_ASSERT(test == arr->nativeGetSlot(0));
     id = NameToId(cx->names().input);
     if (!baseops::GetProperty(cx, arr, id, &test))
         return false;
     JS_ASSERT(test == arr->nativeGetSlot(1));
 #endif
     rval.setObject(*arr);
     return true;
 }
 static RegExpRunStatus
 ExecuteRegExpImpl(JSContext *cx, RegExpStatics *res, RegExpShared &re,
                   Handle<JSLinearString*> input, const jschar *chars, size_t length,
                   size_t *lastIndex, MatchConduit &matches)
 {
     RegExpRunStatus status;
     /* Switch between MatchOnly and IncludeSubpatterns modes. */
     if (matches.isPair) {
         size_t lastIndex_orig = *lastIndex;
         /* Only one MatchPair slot provided: execute short-circuiting regexp. */
         status = re.executeMatchOnly(cx, chars, length, lastIndex, *matches.u.pair);
         if (status == RegExpRunStatus_Success && res)
             res->updateLazily(cx, input, &re, lastIndex_orig);
     } else {
         /* Vector of MatchPairs provided: execute full regexp. */
         status = re.execute(cx, chars, length, lastIndex, *matches.u.pairs);
         if (status == RegExpRunStatus_Success && res) {
             if (!res->updateFromMatchPairs(cx, input, *matches.u.pairs))
                 return RegExpRunStatus_Error;
         }
     }
     return status;
 }
 /* Legacy ExecuteRegExp behavior is baked into the JSAPI. */
 bool
 js::ExecuteRegExpLegacy(JSContext *cx, RegExpStatics *res, RegExpObject &reobj,
                         Handle<JSLinearString*> input_, const jschar *chars, size_t length,
                         size_t *lastIndex, bool test, MutableHandleValue rval)
 {
     RegExpGuard shared(cx);
     if (!reobj.getShared(cx, &shared))
         return false;
     ScopedMatchPairs matches(&cx->tempLifoAlloc());
     MatchConduit conduit(&matches);
     RegExpRunStatus status =
         ExecuteRegExpImpl(cx, res, *shared, input_, chars, length, lastIndex, conduit);
     if (status == RegExpRunStatus_Error)
         return false;
     if (status == RegExpRunStatus_Success_NotFound) {
         /* ExecuteRegExp() previously returned an array or null. */
         rval.setNull();
         return true;
     }
     if (test) {
         /* Forbid an array, as an optimization. */
         rval.setBoolean(true);
         return true;
     }
     RootedString input(cx, input_);
     if (!input) {
         input = js_NewStringCopyN<CanGC>(cx, chars, length);
         if (!input)
             return false;
     }
     return CreateRegExpMatchResult(cx, input, matches, rval);
 }
 /* Note: returns the original if no escaping need be performed. */
 static JSAtom *
 EscapeNakedForwardSlashes(JSContext *cx, HandleAtom unescaped)
 {
     size_t oldLen = unescaped->length();
     const jschar *oldChars = unescaped->chars();
     JS::Anchor<JSString *> anchor(unescaped);
     /* We may never need to use |sb|. Start using it lazily. */
     StringBuffer sb(cx);
     for (const jschar *it = oldChars; it < oldChars + oldLen; ++it) {
         if (*it == '/' && (it == oldChars || it[-1] != '\\')) {
             /* There's a forward slash that needs escaping. */
             if (sb.empty()) {
                 /* This is the first one we've seen, copy everything up to this point. */
                 if (!sb.reserve(oldLen + 1))
                     return nullptr;
                 sb.infallibleAppend(oldChars, size_t(it - oldChars));
             }
             if (!sb.append('\\'))
                 return nullptr;
         }
         if (!sb.empty() && !sb.append(*it))
             return nullptr;
     }
     return sb.empty() ? (JSAtom *)unescaped : sb.finishAtom();
 }
 /*
  * Compile a new |RegExpShared| for the |RegExpObject|.
  *
  * Per ECMAv5 15.10.4.1, we act on combinations of (pattern, flags) as
  * arguments:
  *
  *  RegExp, undefined => flags := pattern.flags
  *  RegExp, _ => throw TypeError
  *  _ => pattern := ToString(pattern) if defined(pattern) else ''
  *       flags := ToString(flags) if defined(flags) else ''
  */
 static bool
 CompileRegExpObject(JSContext *cx, RegExpObjectBuilder &builder, CallArgs args)
 {
     if (args.length() == 0) {
         RegExpStatics *res = cx->global()->getRegExpStatics();
         Rooted<JSAtom*> empty(cx, cx->runtime()->emptyString);
         RegExpObject *reobj = builder.build(empty, res->getFlags());
         if (!reobj)
             return false;
         args.rval().setObject(*reobj);
         return true;
     }
     RootedValue sourceValue(cx, args[0]);
     /*
      * If we get passed in an object whose internal [[Class]] property is
      * "RegExp", return a new object with the same source/flags.
      */
     if (IsObjectWithClass(sourceValue, ESClass_RegExp, cx)) {
         /*
          * Beware, sourceObj may be a (transparent) proxy to a RegExp, so only
          * use generic (proxyable) operations on sourceObj that do not assume
          * sourceObj.is<RegExpObject>().
          */
         RootedObject sourceObj(cx, &sourceValue.toObject());
         if (args.hasDefined(1)) {
             JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_NEWREGEXP_FLAGGED);
             return false;
         }
         /*
          * Only extract the 'flags' out of sourceObj; do not reuse the
          * RegExpShared since it may be from a different compartment.
          */
         RegExpFlag flags;
         {
             RegExpGuard g(cx);
             if (!RegExpToShared(cx, sourceObj, &g))
                 return false;
             flags = g->getFlags();
         }
         /*
          * 'toSource' is a permanent read-only property, so this is equivalent
          * to executing RegExpObject::getSource on the unwrapped object.
          */
         RootedValue v(cx);
         if (!JSObject::getProperty(cx, sourceObj, sourceObj, cx->names().source, &v))
             return false;
         Rooted<JSAtom*> sourceAtom(cx, &v.toString()->asAtom());
         RegExpObject *reobj = builder.build(sourceAtom, flags);
         if (!reobj)
             return false;
         args.rval().setObject(*reobj);
         return true;
     }
     RootedAtom source(cx);
     if (sourceValue.isUndefined()) {
         source = cx->runtime()->emptyString;
     } else {
         /* Coerce to string and compile. */
         source = ToAtom<CanGC>(cx, sourceValue);
         if (!source)
             return false;
     }
     RegExpFlag flags = RegExpFlag(0);
     if (args.hasDefined(1)) {
         RootedString flagStr(cx, ToString<CanGC>(cx, args[1]));
         if (!flagStr)
             return false;
         args[1].setString(flagStr);
         if (!ParseRegExpFlags(cx, flagStr, &flags))
             return false;
     }
     RootedAtom escapedSourceStr(cx, EscapeNakedForwardSlashes(cx, source));
     if (!escapedSourceStr)
         return false;
     if (!js::RegExpShared::checkSyntax(cx, nullptr, escapedSourceStr))
         return false;
     RegExpStatics *res = cx->global()->getRegExpStatics();
     RegExpObject *reobj = builder.build(escapedSourceStr, RegExpFlag(flags | res->getFlags()));
     if (!reobj)
         return false;
     args.rval().setObject(*reobj);
     return true;
 }
 MOZ_ALWAYS_INLINE bool
 IsRegExp(HandleValue v)
 {
     return v.isObject() && v.toObject().is<RegExpObject>();
 }
 MOZ_ALWAYS_INLINE bool
 regexp_compile_impl(JSContext *cx, CallArgs args)
 {
     JS_ASSERT(IsRegExp(args.thisv()));
     RegExpObjectBuilder builder(cx, &args.thisv().toObject().as<RegExpObject>());
     return CompileRegExpObject(cx, builder, args);
 }
 static bool
 regexp_compile(JSContext *cx, unsigned argc, Value *vp)
 {
     CallArgs args = CallArgsFromVp(argc, vp);
     return CallNonGenericMethod<IsRegExp, regexp_compile_impl>(cx, args);
 }
 static bool
 regexp_construct(JSContext *cx, unsigned argc, Value *vp)
 {
     CallArgs args = CallArgsFromVp(argc, vp);
     if (!args.isConstructing()) {
         /*
          * If first arg is regexp and no flags are given, just return the arg.
          * Otherwise, delegate to the standard constructor.
          * See ECMAv5 15.10.3.1.
          */
         if (args.hasDefined(0) &&
             IsObjectWithClass(args[0], ESClass_RegExp, cx) &&
             !args.hasDefined(1))
         {
             args.rval().set(args[0]);
             return true;
         }
     }
     RegExpObjectBuilder builder(cx);
     return CompileRegExpObject(cx, builder, args);
 }
 MOZ_ALWAYS_INLINE bool
 regexp_toString_impl(JSContext *cx, CallArgs args)
 {
     JS_ASSERT(IsRegExp(args.thisv()));
     JSString *str = args.thisv().toObject().as<RegExpObject>().toString(cx);
     if (!str)
         return false;
     args.rval().setString(str);
     return true;
 }
 static bool
 regexp_toString(JSContext *cx, unsigned argc, Value *vp)
 {
     CallArgs args = CallArgsFromVp(argc, vp);
     return CallNonGenericMethod<IsRegExp, regexp_toString_impl>(cx, args);
 }
 static const JSFunctionSpec regexp_methods[] = {
 #if JS_HAS_TOSOURCE
     JS_FN(js_toSource_str,  regexp_toString,    0,0),
 #endif
     JS_FN(js_toString_str,  regexp_toString,    0,0),
     JS_FN("compile",        regexp_compile,     2,0),
     JS_FN("exec",           regexp_exec,        1,0),
     JS_FN("test",           regexp_test,        1,0),
     JS_FS_END
 };
 /*
  * RegExp static properties.
  *
  * RegExp class static properties and their Perl counterparts:
  *
  *  RegExp.input                $_
  *  RegExp.multiline            $*
  *  RegExp.lastMatch            $&
  *  RegExp.lastParen            $+
  *  RegExp.leftContext          $`
  *  RegExp.rightContext         $'
  */
 #define DEFINE_STATIC_GETTER(name, code)                                        \
     static bool                                                                 \
     name(JSContext *cx, unsigned argc, Value *vp)                               \
     {                                                                           \
         CallArgs args = CallArgsFromVp(argc, vp);                               \
         RegExpStatics *res = cx->global()->getRegExpStatics();                  \
         code;                                                                   \
     }
 DEFINE_STATIC_GETTER(static_input_getter,        return res->createPendingInput(cx, args.rval()))
 DEFINE_STATIC_GETTER(static_multiline_getter,    args.rval().setBoolean(res->multiline());
                                                  return true)
 DEFINE_STATIC_GETTER(static_lastMatch_getter,    return res->createLastMatch(cx, args.rval()))
 DEFINE_STATIC_GETTER(static_lastParen_getter,    return res->createLastParen(cx, args.rval()))
 DEFINE_STATIC_GETTER(static_leftContext_getter,  return res->createLeftContext(cx, args.rval()))
 DEFINE_STATIC_GETTER(static_rightContext_getter, return res->createRightContext(cx, args.rval()))
 DEFINE_STATIC_GETTER(static_paren1_getter,       return res->createParen(cx, 1, args.rval()))
 DEFINE_STATIC_GETTER(static_paren2_getter,       return res->createParen(cx, 2, args.rval()))
 DEFINE_STATIC_GETTER(static_paren3_getter,       return res->createParen(cx, 3, args.rval()))
 DEFINE_STATIC_GETTER(static_paren4_getter,       return res->createParen(cx, 4, args.rval()))
 DEFINE_STATIC_GETTER(static_paren5_getter,       return res->createParen(cx, 5, args.rval()))
 DEFINE_STATIC_GETTER(static_paren6_getter,       return res->createParen(cx, 6, args.rval()))
 DEFINE_STATIC_GETTER(static_paren7_getter,       return res->createParen(cx, 7, args.rval()))
 DEFINE_STATIC_GETTER(static_paren8_getter,       return res->createParen(cx, 8, args.rval()))
 DEFINE_STATIC_GETTER(static_paren9_getter,       return res->createParen(cx, 9, args.rval()))
 #define DEFINE_STATIC_SETTER(name, code)                                        \
     static bool                                                                 \
     name(JSContext *cx, unsigned argc, Value *vp)                               \
     {                                                                           \
         RegExpStatics *res = cx->global()->getRegExpStatics();                  \
         code;                                                                   \
         return true;                                                            \
     }
 static bool
 static_input_setter(JSContext *cx, unsigned argc, Value *vp)
 {
     CallArgs args = CallArgsFromVp(argc, vp);
     RegExpStatics *res = cx->global()->getRegExpStatics();
     RootedString str(cx, ToString<CanGC>(cx, args.get(0)));
     if (!str)
         return false;
     res->setPendingInput(str);
     args.rval().setString(str);
     return true;
 }
 static bool
 static_multiline_setter(JSContext *cx, unsigned argc, Value *vp)
 {
     CallArgs args = CallArgsFromVp(argc, vp);
     RegExpStatics *res = cx->global()->getRegExpStatics();
     bool b = ToBoolean(args.get(0));
     res->setMultiline(cx, b);
     args.rval().setBoolean(b);
     return true;
 }
 static const JSPropertySpec regexp_static_props[] = {
     JS_PSGS("input", static_input_getter, static_input_setter,
             JSPROP_PERMANENT | JSPROP_ENUMERATE),
     JS_PSGS("multiline", static_multiline_getter, static_multiline_setter,
             JSPROP_PERMANENT | JSPROP_ENUMERATE),
     JS_PSG("lastMatch", static_lastMatch_getter, JSPROP_PERMANENT | JSPROP_ENUMERATE),
     JS_PSG("lastParen", static_lastParen_getter, JSPROP_PERMANENT | JSPROP_ENUMERATE),
     JS_PSG("leftContext",  static_leftContext_getter, JSPROP_PERMANENT | JSPROP_ENUMERATE),
     JS_PSG("rightContext", static_rightContext_getter, JSPROP_PERMANENT | JSPROP_ENUMERATE),
     JS_PSG("$1", static_paren1_getter, JSPROP_PERMANENT | JSPROP_ENUMERATE),
     JS_PSG("$2", static_paren2_getter, JSPROP_PERMANENT | JSPROP_ENUMERATE),
     JS_PSG("$3", static_paren3_getter, JSPROP_PERMANENT | JSPROP_ENUMERATE),
     JS_PSG("$4", static_paren4_getter, JSPROP_PERMANENT | JSPROP_ENUMERATE),
     JS_PSG("$5", static_paren5_getter, JSPROP_PERMANENT | JSPROP_ENUMERATE),
     JS_PSG("$6", static_paren6_getter, JSPROP_PERMANENT | JSPROP_ENUMERATE),
     JS_PSG("$7", static_paren7_getter, JSPROP_PERMANENT | JSPROP_ENUMERATE),
     JS_PSG("$8", static_paren8_getter, JSPROP_PERMANENT | JSPROP_ENUMERATE),
     JS_PSG("$9", static_paren9_getter, JSPROP_PERMANENT | JSPROP_ENUMERATE),
     JS_PSGS("$_", static_input_getter, static_input_setter, JSPROP_PERMANENT),
     JS_PSGS("$*", static_multiline_getter, static_multiline_setter, JSPROP_PERMANENT),
     JS_PSG("$&", static_lastMatch_getter, JSPROP_PERMANENT),
     JS_PSG("$+", static_lastParen_getter, JSPROP_PERMANENT),
     JS_PSG("$`", static_leftContext_getter, JSPROP_PERMANENT),
     JS_PSG("$'", static_rightContext_getter, JSPROP_PERMANENT),
     JS_PS_END
 };
 JSObject *
 js_InitRegExpClass(JSContext *cx, HandleObject obj)
 {
     JS_ASSERT(obj->isNative());
     Rooted<GlobalObject*> global(cx, &obj->as<GlobalObject>());
     RootedObject proto(cx, global->createBlankPrototype(cx, &RegExpObject::class_));
     if (!proto)
         return nullptr;
     proto->setPrivate(nullptr);
     HandlePropertyName empty = cx->names().empty;
     RegExpObjectBuilder builder(cx, &proto->as<RegExpObject>());
     if (!builder.build(empty, RegExpFlag(0)))
         return nullptr;
     if (!DefinePropertiesAndBrand(cx, proto, nullptr, regexp_methods))
         return nullptr;
     RootedFunction ctor(cx);
     ctor = global->createConstructor(cx, regexp_construct, cx->names().RegExp, 2);
     if (!ctor)
         return nullptr;
     if (!LinkConstructorAndPrototype(cx, ctor, proto))
         return nullptr;
     /* Add static properties to the RegExp constructor. */
     if (!JS_DefineProperties(cx, ctor, regexp_static_props))
         return nullptr;
     if (!GlobalObject::initBuiltinConstructor(cx, global, JSProto_RegExp, ctor, proto))
         return nullptr;
     return proto;
 }
 RegExpRunStatus
 js::ExecuteRegExp(JSContext *cx, HandleObject regexp, HandleString string,
                   MatchConduit &matches, RegExpStaticsUpdate staticsUpdate)
 {
     /* Step 1 (b) was performed by CallNonGenericMethod. */
     Rooted<RegExpObject*> reobj(cx, &regexp->as<RegExpObject>());
     RegExpGuard re(cx);
     if (!reobj->getShared(cx, &re))
         return RegExpRunStatus_Error;
     RegExpStatics *res = (staticsUpdate == UpdateRegExpStatics)
                          ? cx->global()->getRegExpStatics()
                          : nullptr;
     /* Step 3. */
     Rooted<JSLinearString*> input(cx, string->ensureLinear(cx));
     if (!input)
         return RegExpRunStatus_Error;
     /* Step 4. */
     RootedValue lastIndex(cx, reobj->getLastIndex());
     size_t length = input->length();
     /* Step 5. */
     int i;
     if (lastIndex.isInt32()) {
         /* Aggressively avoid doubles. */
         i = lastIndex.toInt32();
     } else {
         double d;
         if (!ToInteger(cx, lastIndex, &d))
             return RegExpRunStatus_Error;
         /* Inlined steps 6, 7, 9a with doubles to detect failure case. */
         if ((re->global() || re->sticky()) && (d < 0 || d > length)) {
             reobj->zeroLastIndex();
             return RegExpRunStatus_Success_NotFound;
         }
         i = int(d);
     }
     /* Steps 6-7 (with sticky extension). */
     if (!re->global() && !re->sticky())
         i = 0;
     /* Step 9a. */
     if (i < 0 || size_t(i) > length) {
         reobj->zeroLastIndex();
         return RegExpRunStatus_Success_NotFound;
     }
     /* Steps 8-21. */
     const jschar *chars = input->chars();
     size_t lastIndexInt(i);
     RegExpRunStatus status =
         ExecuteRegExpImpl(cx, res, *re, input, chars, length, &lastIndexInt, matches);
     if (status == RegExpRunStatus_Error)
         return RegExpRunStatus_Error;
     /* Steps 9a and 11 (with sticky extension). */
     if (status == RegExpRunStatus_Success_NotFound)
         reobj->zeroLastIndex();
     else if (re->global() || re->sticky())
         reobj->setLastIndex(lastIndexInt);
     return status;
 }
 /* ES5 15.10.6.2 (and 15.10.6.3, which calls 15.10.6.2). */
 static RegExpRunStatus
 ExecuteRegExp(JSContext *cx, CallArgs args, MatchConduit &matches)
 {
     /* Step 1 (a) was performed by CallNonGenericMethod. */
     RootedObject regexp(cx, &args.thisv().toObject());
     /* Step 2. */
     RootedString string(cx, ToString<CanGC>(cx, args.get(0)));
     if (!string)
         return RegExpRunStatus_Error;
     return ExecuteRegExp(cx, regexp, string, matches, UpdateRegExpStatics);
 }
 /* ES5 15.10.6.2. */
 static bool
 regexp_exec_impl(JSContext *cx, HandleObject regexp, HandleString string,
                  RegExpStaticsUpdate staticsUpdate, MutableHandleValue rval)
 {
     /* Execute regular expression and gather matches. */
     ScopedMatchPairs matches(&cx->tempLifoAlloc());
     MatchConduit conduit(&matches);
     RegExpRunStatus status = ExecuteRegExp(cx, regexp, string, conduit, staticsUpdate);
     if (status == RegExpRunStatus_Error)
         return false;
     if (status == RegExpRunStatus_Success_NotFound) {
         rval.setNull();
         return true;
     }
     return CreateRegExpMatchResult(cx, string, matches, rval);
 }
 static bool
 regexp_exec_impl(JSContext *cx, CallArgs args)
 {
     RootedObject regexp(cx, &args.thisv().toObject());
     RootedString string(cx, ToString<CanGC>(cx, args.get(0)));
     if (!string)
         return false;
     return regexp_exec_impl(cx, regexp, string, UpdateRegExpStatics, args.rval());
 }
 bool
 js::regexp_exec(JSContext *cx, unsigned argc, Value *vp)
 {
     CallArgs args = CallArgsFromVp(argc, vp);
     return CallNonGenericMethod(cx, IsRegExp, regexp_exec_impl, args);
 }
 /* Separate interface for use by IonMonkey. */
 bool
 js::regexp_exec_raw(JSContext *cx, HandleObject regexp, HandleString input, MutableHandleValue output)
 {
     return regexp_exec_impl(cx, regexp, input, UpdateRegExpStatics, output);
 }
 bool
 js::regexp_exec_no_statics(JSContext *cx, unsigned argc, Value *vp)
 {
     CallArgs args = CallArgsFromVp(argc, vp);
     JS_ASSERT(args.length() == 2);
     JS_ASSERT(IsRegExp(args[0]));
     JS_ASSERT(args[1].isString());
     RootedObject regexp(cx, &args[0].toObject());
     RootedString string(cx, args[1].toString());
     return regexp_exec_impl(cx, regexp, string, DontUpdateRegExpStatics, args.rval());
 }
 /* ES5 15.10.6.3. */
 static bool
 regexp_test_impl(JSContext *cx, CallArgs args)
 {
     MatchPair match;
     MatchConduit conduit(&match);
     RegExpRunStatus status = ExecuteRegExp(cx, args, conduit);
     args.rval().setBoolean(status == RegExpRunStatus_Success);
     return status != RegExpRunStatus_Error;
 }
 /* Separate interface for use by IonMonkey. */
 bool
 js::regexp_test_raw(JSContext *cx, HandleObject regexp, HandleString input, bool *result)
 {
     MatchPair match;
     MatchConduit conduit(&match);
     RegExpRunStatus status = ExecuteRegExp(cx, regexp, input, conduit, UpdateRegExpStatics);
     *result = (status == RegExpRunStatus_Success);
     return status != RegExpRunStatus_Error;
 }
 bool
 js::regexp_test(JSContext *cx, unsigned argc, Value *vp)
 {
     CallArgs args = CallArgsFromVp(argc, vp);
     return CallNonGenericMethod(cx, IsRegExp, regexp_test_impl, args);
 }
 bool
 js::regexp_test_no_statics(JSContext *cx, unsigned argc, Value *vp)
 {
     CallArgs args = CallArgsFromVp(argc, vp);
     JS_ASSERT(args.length() == 2);
     JS_ASSERT(IsRegExp(args[0]));
     JS_ASSERT(args[1].isString());
     RootedObject regexp(cx, &args[0].toObject());
     RootedString string(cx, args[1].toString());
     MatchPair match;
     MatchConduit conduit(&match);
     RegExpRunStatus status = ExecuteRegExp(cx, regexp, string, conduit, DontUpdateRegExpStatics);
     args.rval().setBoolean(status == RegExpRunStatus_Success);
     return status != RegExpRunStatus_Error;
 }

The Tor Browser / annotate

js/src/builtin/RegExp.cpp@6474c204b198 (annotated)

js/src/builtin/RegExp.cpp