[regexp] Turn last match info into a simple FixedArray

test/fuzzer/regexp.cc

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 
 #include "include/v8.h"
 #include "src/factory.h"
 #include "src/objects-inl.h"
 #include "src/objects.h"
 #include "src/regexp/jsregexp.h"
 #include "test/fuzzer/fuzzer-support.h"
 
 namespace i = v8::internal;
 
 void Test(v8::Isolate* isolate, i::Handle<i::JSRegExp> regexp,
-          i::Handle<i::String> subject, i::Handle<i::JSArray> results_array) {
+          i::Handle<i::String> subject,
+          i::Handle<i::RegExpMatchInfo> results_array) {
   v8::TryCatch try_catch(isolate);
   USE(i::RegExpImpl::Exec(regexp, subject, 0, results_array));
 }
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   v8_fuzzer::FuzzerSupport* support = v8_fuzzer::FuzzerSupport::Get();
   v8::Isolate* isolate = support->GetIsolate();
 
   v8::Isolate::Scope isolate_scope(isolate);
   v8::HandleScope handle_scope(isolate);
@@ skipping 11 matching lines @@
   i::Handle<i::String> source;
   if (!maybe_source.ToHandle(&source)) return 0;
 
   static const int kAllFlags = i::JSRegExp::kGlobal | i::JSRegExp::kIgnoreCase |
                                i::JSRegExp::kMultiline | i::JSRegExp::kSticky |
                                i::JSRegExp::kUnicode;
 
   const uint8_t one_byte_array[6] = {'f', 'o', 'o', 'b', 'a', 'r'};
   const i::uc16 two_byte_array[6] = {'f', 0xD83D, 0xDCA9, 'b', 'a', 0x2603};
 
-  i::Handle<i::JSArray> results_array = factory->NewJSArray(5);
+  i::Handle<i::RegExpMatchInfo> results_array = factory->NewRegExpMatchInfo();
   i::Handle<i::String> one_byte =
       factory->NewStringFromOneByte(i::Vector<const uint8_t>(one_byte_array, 6))
           .ToHandleChecked();
   i::Handle<i::String> two_byte =
       factory->NewStringFromTwoByte(i::Vector<const i::uc16>(two_byte_array, 6))
           .ToHandleChecked();
 
   for (int flags = 0; flags <= kAllFlags; flags++) {
     i::Handle<i::JSRegExp> regexp;
     {
       v8::TryCatch try_catch(isolate);
       i::MaybeHandle<i::JSRegExp> maybe_regexp =
           i::JSRegExp::New(source, static_cast<i::JSRegExp::Flags>(flags));
       if (!maybe_regexp.ToHandle(&regexp)) {
         i_isolate->clear_pending_exception();
         continue;
       }
     }
     Test(isolate, regexp, one_byte, results_array);
     Test(isolate, regexp, two_byte, results_array);
     Test(isolate, regexp, factory->empty_string(), results_array);
     Test(isolate, regexp, source, results_array);
   }
 
   isolate->RequestGarbageCollectionForTesting(
       v8::Isolate::kFullGarbageCollection);
   return 0;
 }