Make the RegExp.prototype object be a RegExp object.

BUG=v8:1217
TEST=mjsunit/regress/regress-1217

Review URL: http://codereview.chromium.org/8041015

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9419 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/bootstrapper.cc

@@ -995,6 +995,26 @@ void Genesis::InitializeGlobal(Handle<GlobalObject> inner_global,
         initial_map->instance_size() + 5 * kPointerSize);
     initial_map->set_instance_descriptors(*descriptors);
     initial_map->set_visitor_id(StaticVisitorBase::GetVisitorId(*initial_map));
+
+    // RegExp prototype object is itself a RegExp.
+    Handle<Map> proto_map = factory->CopyMapDropTransitions(initial_map);
+    proto_map->set_prototype(global_context()->initial_object_prototype());
+    Handle<JSObject> proto = factory->NewJSObjectFromMap(proto_map);
+    proto->InObjectPropertyAtPut(JSRegExp::kSourceFieldIndex,
+                                 heap->empty_string());
+    proto->InObjectPropertyAtPut(JSRegExp::kGlobalFieldIndex,
+                                 heap->false_value());
+    proto->InObjectPropertyAtPut(JSRegExp::kIgnoreCaseFieldIndex,
+                                 heap->false_value());
+    proto->InObjectPropertyAtPut(JSRegExp::kMultilineFieldIndex,
+                                 heap->false_value());
+    proto->InObjectPropertyAtPut(JSRegExp::kLastIndexFieldIndex,
+                                 Smi::FromInt(0),
+                                 SKIP_WRITE_BARRIER);  // It's a Smi.
+    initial_map->set_prototype(*proto);
+    factory->SetRegExpIrregexpData(Handle<JSRegExp>::cast(proto),
+                                   JSRegExp::IRREGEXP, factory->empty_string(),
+                                   JSRegExp::Flags(0), 0);
   }
 
   {  // -- J S O N

src/regexp.js

@@ -95,12 +95,11 @@ function RegExpConstructor(pattern, flags) {
   }
 }
 
-
 // Deprecated RegExp.prototype.compile method.  We behave like the constructor
 // were called again.  In SpiderMonkey, this method returns the regexp object.
 // In JSC, it returns undefined.  For compatibility with JSC, we match their
 // behavior.
-function CompileRegExp(pattern, flags) {
+function RegExpCompile(pattern, flags) {
   // Both JSC and SpiderMonkey treat a missing pattern argument as the
   // empty subject string, and an actual undefined value passed as the
   // pattern as the string 'undefined'.  Note that JSC is inconsistent
@@ -108,6 +107,11 @@ function CompileRegExp(pattern, flags) {
   // RegExp.prototype.compile and in the constructor, where they are
   // the empty string.  For compatibility with JSC, we match their
   // behavior.
+  if (this == $RegExp.prototype) {
+    // We don't allow recompiling RegExp.prototype.
+    throw MakeTypeError('incompatible_method_receiver',
+                        ['RegExp.prototype.compile', this]);
+  }
   if (IS_UNDEFINED(pattern) && %_ArgumentsLength() != 0) {
     DoConstructRegExp(this, 'undefined', flags);
   } else {
@@ -408,7 +412,6 @@ var lastMatchInfoOverride = null;
 function SetUpRegExp() {
   %CheckIsBootstrapping();
   %FunctionSetInstanceClassName($RegExp, 'RegExp');
-  %FunctionSetPrototype($RegExp, new $Object());
   %SetProperty($RegExp.prototype, 'constructor', $RegExp, DONT_ENUM);
   %SetCode($RegExp, RegExpConstructor);
 
@@ -416,7 +419,7 @@ function SetUpRegExp() {
     "exec", RegExpExec,
     "test", RegExpTest,
     "toString", RegExpToString,
-    "compile", CompileRegExp
+    "compile", RegExpCompile
   ));
 
   // The length of compile is 1 in SpiderMonkey.

test/es5conform/es5conform.status

@@ -96,9 +96,6 @@ chapter15/15.2/15.2.3/15.2.3.4/15.2.3.4-4-7: FAIL_OK
 # SUBSETFAIL
 chapter15/15.2/15.2.3/15.2.3.4/15.2.3.4-4-11: FAIL_OK
 
-# We do not implement all methods on RegExp.
-chapter15/15.2/15.2.3/15.2.3.4/15.2.3.4-4-13: FAIL
-
 # SUBSETFAIL
 chapter15/15.2/15.2.3/15.2.3.4/15.2.3.4-4-14: FAIL_OK
 
@@ -191,22 +188,6 @@ chapter15/15.5/15.5.4/15.5.4.20/15.5.4.20-4-10: FAIL
 chapter15/15.5/15.5.4/15.5.4.20/15.5.4.20-4-18: FAIL
 chapter15/15.5/15.5.4/15.5.4.20/15.5.4.20-4-34: FAIL
 
-# RegExp.prototype is not of type RegExp - we are bug compatible with JSC.
-chapter15/15.10/15.10.6/15.10.6: FAIL_OK
-
-# We do not have the properties of a RegExp instance on RegExp.prototype.
-# The spec says we should - but we are currently bug compatible with JSC.
-chapter15/15.10/15.10.7/15.10.7.1/15.10.7.1-1: FAIL_OK
-chapter15/15.10/15.10.7/15.10.7.1/15.10.7.1-2: FAIL_OK
-chapter15/15.10/15.10.7/15.10.7.2/15.10.7.2-1: FAIL_OK
-chapter15/15.10/15.10.7/15.10.7.2/15.10.7.2-2: FAIL_OK
-chapter15/15.10/15.10.7/15.10.7.3/15.10.7.3-1: FAIL_OK
-chapter15/15.10/15.10.7/15.10.7.3/15.10.7.3-2: FAIL_OK
-chapter15/15.10/15.10.7/15.10.7.4/15.10.7.4-1: FAIL_OK
-chapter15/15.10/15.10.7/15.10.7.4/15.10.7.4-2: FAIL_OK
-chapter15/15.10/15.10.7/15.10.7.5/15.10.7.5-1: FAIL_OK
-chapter15/15.10/15.10.7/15.10.7.5/15.10.7.5-2: FAIL_OK
-
 ##############################################################################
 # Unimplemented parts of strict mode
 # Setting expectations to fail only so that the tests trigger as soon as

test/mjsunit/regress/regress-1217.js

@@ -25,8 +25,26 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Check conformity to ECMA-262 15.10.6.
-// The class of RegExp's prototype is RegExp.
+// Check that RegExp.prototype is itself a RegExp object.
 
-var prototype_class = ({}).toString.call(RegExp.prototype);
-assertEquals("[object RegExp]", prototype_class);
+var proto = RegExp.prototype;
+assertEquals("[object RegExp]", Object.prototype.toString.call(proto));
+
+assertEquals("", proto.source);
+assertEquals(false, proto.global);
+assertEquals(false, proto.multiline);
+assertEquals(false, proto.ignoreCase);
+assertEquals(0, proto.lastIndex);
+
+assertEquals("/(?:)/", proto.toString());
+
+var execResult = proto.exec("argle");
+assertEquals(1, execResult.length);
+assertEquals("", execResult[0]);
+assertEquals("argle", execResult.input);
+assertEquals(0, execResult.index);
+
+assertTrue(proto.test("argle"));
+
+// We disallow re-compiling the RegExp.prototype object.
+assertThrows(function(){ proto.compile("something"); }, TypeError);

test/sputnik/sputnik.status

@@ -52,6 +52,9 @@ S15.10.6.2_A1_T16: FAIL_OK
 S15.10.6.2_A12: FAIL_OK
 S15.10.6.3_A1_T16: FAIL_OK
 
+# Sputnik tests (r97) assume RegExp.prototype is an Object, not a RegExp.
+S15.10.6_A2: FAIL_OK
+
 # We are silent in some regexp cases where the spec wants us to give
 # errors, for compatibility.
 S15.10.2.11_A1_T2: FAIL