Named all zones in the project

test/cctest/test-regexp.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 80 matching lines @@
 #include "src/x87/macro-assembler-x87.h"
 #endif
 #endif  // V8_INTERPRETED_REGEXP
 #include "test/cctest/cctest.h"
 
 using namespace v8::internal;
 
 
 static bool CheckParse(const char* input) {
   v8::HandleScope scope(CcTest::isolate());
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
   FlatStringReader reader(CcTest::i_isolate(), CStrVector(input));
   RegExpCompileData result;
   return v8::internal::RegExpParser::ParseRegExp(
       CcTest::i_isolate(), &zone, &reader, JSRegExp::kNone, &result);
 }
 
 
 static void CheckParseEq(const char* input, const char* expected,
                          bool unicode = false) {
   v8::HandleScope scope(CcTest::isolate());
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
   FlatStringReader reader(CcTest::i_isolate(), CStrVector(input));
   RegExpCompileData result;
   JSRegExp::Flags flags = JSRegExp::kNone;
   if (unicode) flags |= JSRegExp::kUnicode;
   CHECK(v8::internal::RegExpParser::ParseRegExp(CcTest::i_isolate(), &zone,
                                                 &reader, flags, &result));
   CHECK(result.tree != NULL);
   CHECK(result.error.is_null());
   std::ostringstream os;
   result.tree->Print(os, &zone);
   if (strcmp(expected, os.str().c_str()) != 0) {
     printf("%s | %s\n", expected, os.str().c_str());
   }
   CHECK_EQ(0, strcmp(expected, os.str().c_str()));
 }
 
 
 static bool CheckSimple(const char* input) {
   v8::HandleScope scope(CcTest::isolate());
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
   FlatStringReader reader(CcTest::i_isolate(), CStrVector(input));
   RegExpCompileData result;
   CHECK(v8::internal::RegExpParser::ParseRegExp(
       CcTest::i_isolate(), &zone, &reader, JSRegExp::kNone, &result));
   CHECK(result.tree != NULL);
   CHECK(result.error.is_null());
   return result.simple;
 }
 
 struct MinMaxPair {
   int min_match;
   int max_match;
 };
 
 
 static MinMaxPair CheckMinMaxMatch(const char* input) {
   v8::HandleScope scope(CcTest::isolate());
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
   FlatStringReader reader(CcTest::i_isolate(), CStrVector(input));
   RegExpCompileData result;
   CHECK(v8::internal::RegExpParser::ParseRegExp(
       CcTest::i_isolate(), &zone, &reader, JSRegExp::kNone, &result));
   CHECK(result.tree != NULL);
   CHECK(result.error.is_null());
   int min_match = result.tree->min_match();
   int max_match = result.tree->max_match();
   MinMaxPair pair = { min_match, max_match };
   return pair;
@@ skipping 309 matching lines @@
 TEST(ParserRegression) {
   CheckParseEq("[A-Z$-][x]", "(! [A-Z $ -] [x])");
   CheckParseEq("a{3,4*}", "(: 'a{3,' (# 0 - g '4') '}')");
   CheckParseEq("{", "'{'");
   CheckParseEq("a|", "(| 'a' %)");
 }
 
 static void ExpectError(const char* input, const char* expected,
                         bool unicode = false) {
   v8::HandleScope scope(CcTest::isolate());
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
   FlatStringReader reader(CcTest::i_isolate(), CStrVector(input));
   RegExpCompileData result;
   JSRegExp::Flags flags = JSRegExp::kNone;
   if (unicode) flags |= JSRegExp::kUnicode;
   CHECK(!v8::internal::RegExpParser::ParseRegExp(CcTest::i_isolate(), &zone,
                                                  &reader, flags, &result));
   CHECK(result.tree == NULL);
   CHECK(!result.error.is_null());
   std::unique_ptr<char[]> str = result.error->ToCString(ALLOW_NULLS);
   CHECK_EQ(0, strcmp(expected, str.get()));
@@ skipping 67 matching lines @@
   return !IsWhiteSpaceOrLineTerminator(c);
 }
 
 
 static bool NotWord(uc16 c) {
   return !IsRegExpWord(c);
 }
 
 
 static void TestCharacterClassEscapes(uc16 c, bool (pred)(uc16 c)) {
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
   ZoneList<CharacterRange>* ranges =
       new(&zone) ZoneList<CharacterRange>(2, &zone);
   CharacterRange::AddClassEscape(c, ranges, &zone);
   for (uc32 i = 0; i < (1 << 16); i++) {
     bool in_class = false;
     for (int j = 0; !in_class && j < ranges->length(); j++) {
       CharacterRange& range = ranges->at(j);
       in_class = (range.from() <= i && i <= range.to());
     }
     CHECK_EQ(pred(i), in_class);
@@ skipping 30 matching lines @@
       isolate->factory()->NewStringFromUtf8(CStrVector("")).ToHandleChecked();
   RegExpEngine::Compile(isolate, zone, &compile_data, flags, pattern,
                         sample_subject, is_one_byte);
   return compile_data.node;
 }
 
 
 static void Execute(const char* input, bool multiline, bool unicode,
                     bool is_one_byte, bool dot_output = false) {
   v8::HandleScope scope(CcTest::isolate());
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
   RegExpNode* node = Compile(input, multiline, unicode, is_one_byte, &zone);
   USE(node);
 #ifdef DEBUG
   if (dot_output) {
     RegExpEngine::DotPrint(input, node, false);
   }
 #endif  // DEBUG
 }
 
 
@@ skipping 17 matching lines @@
 const int TestConfig::kNoKey = 0;
 
 
 static unsigned PseudoRandom(int i, int j) {
   return ~(~((i * 781) ^ (j * 329)));
 }
 
 
 TEST(SplayTreeSimple) {
   static const unsigned kLimit = 1000;
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
   ZoneSplayTree<TestConfig> tree(&zone);
   bool seen[kLimit];
   for (unsigned i = 0; i < kLimit; i++) seen[i] = false;
 #define CHECK_MAPS_EQUAL() do {                                      \
     for (unsigned k = 0; k < kLimit; k++)                            \
       CHECK_EQ(seen[k], tree.Find(k, &loc));                         \
   } while (false)
   for (int i = 0; i < 50; i++) {
     for (int j = 0; j < 50; j++) {
       int next = PseudoRandom(i, j) % kLimit;
@@ skipping 46 matching lines @@
     Vector<uc16> range(ranges[i], 2 * kRangeSize);
     for (int j = 0; j < 2 * kRangeSize; j++) {
       range[j] = PseudoRandom(i + 25, j + 87) % kLimit;
     }
     range.Sort();
     for (int j = 1; j < 2 * kRangeSize; j++) {
       CHECK(range[j-1] <= range[j]);
     }
   }
   // Enter test data into dispatch table.
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
   DispatchTable table(&zone);
   for (int i = 0; i < kRangeCount; i++) {
     uc16* range = ranges[i];
     for (int j = 0; j < 2 * kRangeSize; j += 2)
       table.AddRange(CharacterRange::Range(range[j], range[j + 1]), i, &zone);
   }
   // Check that the table looks as we would expect
   for (int p = 0; p < kLimit; p++) {
     OutSet* outs = table.Get(p);
     for (int j = 0; j < kRangeCount; j++) {
@@ skipping 93 matching lines @@
       0,
       CcTest::i_isolate());
 }
 
 
 TEST(MacroAssemblerNativeSuccess) {
   v8::V8::Initialize();
   ContextInitializer initializer;
   Isolate* isolate = CcTest::i_isolate();
   Factory* factory = isolate->factory();
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
 
   ArchRegExpMacroAssembler m(isolate, &zone, NativeRegExpMacroAssembler::LATIN1,
                              4);
 
   m.Succeed();
 
   Handle<String> source = factory->NewStringFromStaticChars("");
   Handle<Object> code_object = m.GetCode(source);
   Handle<Code> code = Handle<Code>::cast(code_object);
 
@@ skipping 17 matching lines @@
   CHECK_EQ(-1, captures[2]);
   CHECK_EQ(-1, captures[3]);
 }
 
 
 TEST(MacroAssemblerNativeSimple) {
   v8::V8::Initialize();
   ContextInitializer initializer;
   Isolate* isolate = CcTest::i_isolate();
   Factory* factory = isolate->factory();
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
 
   ArchRegExpMacroAssembler m(isolate, &zone, NativeRegExpMacroAssembler::LATIN1,
                              4);
 
   Label fail, backtrack;
   m.PushBacktrack(&fail);
   m.CheckNotAtStart(0, NULL);
   m.LoadCurrentCharacter(2, NULL);
   m.CheckNotCharacter('o', NULL);
   m.LoadCurrentCharacter(1, NULL, false);
@@ skipping 46 matching lines @@
 
   CHECK_EQ(NativeRegExpMacroAssembler::FAILURE, result);
 }
 
 
 TEST(MacroAssemblerNativeSimpleUC16) {
   v8::V8::Initialize();
   ContextInitializer initializer;
   Isolate* isolate = CcTest::i_isolate();
   Factory* factory = isolate->factory();
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
 
   ArchRegExpMacroAssembler m(isolate, &zone, NativeRegExpMacroAssembler::UC16,
                              4);
 
   Label fail, backtrack;
   m.PushBacktrack(&fail);
   m.CheckNotAtStart(0, NULL);
   m.LoadCurrentCharacter(2, NULL);
   m.CheckNotCharacter('o', NULL);
   m.LoadCurrentCharacter(1, NULL, false);
@@ skipping 52 matching lines @@
 
   CHECK_EQ(NativeRegExpMacroAssembler::FAILURE, result);
 }
 
 
 TEST(MacroAssemblerNativeBacktrack) {
   v8::V8::Initialize();
   ContextInitializer initializer;
   Isolate* isolate = CcTest::i_isolate();
   Factory* factory = isolate->factory();
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
 
   ArchRegExpMacroAssembler m(isolate, &zone, NativeRegExpMacroAssembler::LATIN1,
                              0);
 
   Label fail;
   Label backtrack;
   m.LoadCurrentCharacter(10, &fail);
   m.Succeed();
   m.Bind(&fail);
   m.PushBacktrack(&backtrack);
@@ skipping 20 matching lines @@
 
   CHECK_EQ(NativeRegExpMacroAssembler::FAILURE, result);
 }
 
 
 TEST(MacroAssemblerNativeBackReferenceLATIN1) {
   v8::V8::Initialize();
   ContextInitializer initializer;
   Isolate* isolate = CcTest::i_isolate();
   Factory* factory = isolate->factory();
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
 
   ArchRegExpMacroAssembler m(isolate, &zone, NativeRegExpMacroAssembler::LATIN1,
                              4);
 
   m.WriteCurrentPositionToRegister(0, 0);
   m.AdvanceCurrentPosition(2);
   m.WriteCurrentPositionToRegister(1, 0);
   Label nomatch;
   m.CheckNotBackReference(0, false, &nomatch);
   m.Fail();
@@ skipping 29 matching lines @@
   CHECK_EQ(6, output[2]);
   CHECK_EQ(-1, output[3]);
 }
 
 
 TEST(MacroAssemblerNativeBackReferenceUC16) {
   v8::V8::Initialize();
   ContextInitializer initializer;
   Isolate* isolate = CcTest::i_isolate();
   Factory* factory = isolate->factory();
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
 
   ArchRegExpMacroAssembler m(isolate, &zone, NativeRegExpMacroAssembler::UC16,
                              4);
 
   m.WriteCurrentPositionToRegister(0, 0);
   m.AdvanceCurrentPosition(2);
   m.WriteCurrentPositionToRegister(1, 0);
   Label nomatch;
   m.CheckNotBackReference(0, false, &nomatch);
   m.Fail();
@@ skipping 32 matching lines @@
   CHECK_EQ(-1, output[3]);
 }
 
 
 
 TEST(MacroAssemblernativeAtStart) {
   v8::V8::Initialize();
   ContextInitializer initializer;
   Isolate* isolate = CcTest::i_isolate();
   Factory* factory = isolate->factory();
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
 
   ArchRegExpMacroAssembler m(isolate, &zone, NativeRegExpMacroAssembler::LATIN1,
                              0);
 
   Label not_at_start, newline, fail;
   m.CheckNotAtStart(0, &not_at_start);
   // Check that prevchar = '\n' and current = 'f'.
   m.CheckCharacter('\n', &newline);
   m.Bind(&fail);
   m.Fail();
@@ skipping 39 matching lines @@
 
   CHECK_EQ(NativeRegExpMacroAssembler::SUCCESS, result);
 }
 
 
 TEST(MacroAssemblerNativeBackRefNoCase) {
   v8::V8::Initialize();
   ContextInitializer initializer;
   Isolate* isolate = CcTest::i_isolate();
   Factory* factory = isolate->factory();
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
 
   ArchRegExpMacroAssembler m(isolate, &zone, NativeRegExpMacroAssembler::LATIN1,
                              4);
 
   Label fail, succ;
 
   m.WriteCurrentPositionToRegister(0, 0);
   m.WriteCurrentPositionToRegister(2, 0);
   m.AdvanceCurrentPosition(3);
   m.WriteCurrentPositionToRegister(3, 0);
@@ skipping 38 matching lines @@
   CHECK_EQ(3, output[3]);
 }
 
 
 
 TEST(MacroAssemblerNativeRegisters) {
   v8::V8::Initialize();
   ContextInitializer initializer;
   Isolate* isolate = CcTest::i_isolate();
   Factory* factory = isolate->factory();
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
 
   ArchRegExpMacroAssembler m(isolate, &zone, NativeRegExpMacroAssembler::LATIN1,
                              6);
 
   uc16 foo_chars[3] = {'f', 'o', 'o'};
   Vector<const uc16> foo(foo_chars, 3);
 
   enum registers { out1, out2, out3, out4, out5, out6, sp, loop_cnt };
   Label fail;
   Label backtrack;
@@ skipping 81 matching lines @@
   CHECK_EQ(9, output[4]);
   CHECK_EQ(-1, output[5]);
 }
 
 
 TEST(MacroAssemblerStackOverflow) {
   v8::V8::Initialize();
   ContextInitializer initializer;
   Isolate* isolate = CcTest::i_isolate();
   Factory* factory = isolate->factory();
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
 
   ArchRegExpMacroAssembler m(isolate, &zone, NativeRegExpMacroAssembler::LATIN1,
                              0);
 
   Label loop;
   m.Bind(&loop);
   m.PushBacktrack(&loop);
   m.GoTo(&loop);
 
   Handle<String> source =
@@ skipping 18 matching lines @@
   CHECK(isolate->has_pending_exception());
   isolate->clear_pending_exception();
 }
 
 
 TEST(MacroAssemblerNativeLotsOfRegisters) {
   v8::V8::Initialize();
   ContextInitializer initializer;
   Isolate* isolate = CcTest::i_isolate();
   Factory* factory = isolate->factory();
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
 
   ArchRegExpMacroAssembler m(isolate, &zone, NativeRegExpMacroAssembler::LATIN1,
                              2);
 
   // At least 2048, to ensure the allocated space for registers
   // span one full page.
   const int large_number = 8000;
   m.WriteCurrentPositionToRegister(large_number, 42);
   m.WriteCurrentPositionToRegister(0, 0);
   m.WriteCurrentPositionToRegister(1, 1);
@@ skipping 27 matching lines @@
   CHECK_EQ(0, captures[0]);
   CHECK_EQ(42, captures[1]);
 
   isolate->clear_pending_exception();
 }
 
 #else  // V8_INTERPRETED_REGEXP
 
 TEST(MacroAssembler) {
   byte codes[1024];
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
   RegExpMacroAssemblerIrregexp m(CcTest::i_isolate(), Vector<byte>(codes, 1024),
                                  &zone);
   // ^f(o)o.
   Label start, fail, backtrack;
 
   m.SetRegister(4, 42);
   m.PushRegister(4, RegExpMacroAssembler::kNoStackLimitCheck);
   m.AdvanceRegister(4, 42);
   m.GoTo(&start);
   m.Fail();
@@ skipping 47 matching lines @@
   CHECK_EQ(42, captures[0]);
 }
 
 #endif  // V8_INTERPRETED_REGEXP
 
 
 TEST(AddInverseToTable) {
   static const int kLimit = 1000;
   static const int kRangeCount = 16;
   for (int t = 0; t < 10; t++) {
-    Zone zone(CcTest::i_isolate()->allocator());
+    Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
     ZoneList<CharacterRange>* ranges =
         new(&zone) ZoneList<CharacterRange>(kRangeCount, &zone);
     for (int i = 0; i < kRangeCount; i++) {
       int from = PseudoRandom(t + 87, i + 25) % kLimit;
       int to = from + (PseudoRandom(i + 87, t + 25) % (kLimit / 20));
       if (to > kLimit) to = kLimit;
       ranges->Add(CharacterRange::Range(from, to), &zone);
     }
     DispatchTable table(&zone);
     DispatchTableConstructor cons(&table, false, &zone);
     cons.set_choice_index(0);
     cons.AddInverse(ranges);
     for (int i = 0; i < kLimit; i++) {
       bool is_on = false;
       for (int j = 0; !is_on && j < kRangeCount; j++)
         is_on = ranges->at(j).Contains(i);
       OutSet* set = table.Get(i);
       CHECK_EQ(is_on, set->Get(0) == false);
     }
   }
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
   ZoneList<CharacterRange>* ranges =
       new(&zone) ZoneList<CharacterRange>(1, &zone);
   ranges->Add(CharacterRange::Range(0xFFF0, 0xFFFE), &zone);
   DispatchTable table(&zone);
   DispatchTableConstructor cons(&table, false, &zone);
   cons.set_choice_index(0);
   cons.AddInverse(ranges);
   CHECK(!table.Get(0xFFFE)->Get(0));
   CHECK(table.Get(0xFFFF)->Get(0));
 }
@@ skipping 92 matching lines @@
       CHECK_EQ(length, length2);
       for (int k = 0; k < length; k++)
         CHECK_EQ(static_cast<int>(chars[k]), static_cast<int>(chars2[k]));
     }
   }
 }
 
 
 static void TestRangeCaseIndependence(Isolate* isolate, CharacterRange input,
                                       Vector<CharacterRange> expected) {
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
   int count = expected.length();
   ZoneList<CharacterRange>* list =
       new(&zone) ZoneList<CharacterRange>(count, &zone);
   list->Add(input, &zone);
   CharacterRange::AddCaseEquivalents(isolate, &zone, list, false);
   list->Remove(0);  // Remove the input before checking results.
   CHECK_EQ(count, list->length());
   for (int i = 0; i < list->length(); i++) {
     CHECK_EQ(expected[i].from(), list->at(i).from());
     CHECK_EQ(expected[i].to(), list->at(i).to());
@@ skipping 48 matching lines @@
   for (int i = 0; i < ranges->length(); i++) {
     CharacterRange range = ranges->at(i);
     if (range.from() <= c && c <= range.to())
       return true;
   }
   return false;
 }
 
 
 TEST(UnicodeRangeSplitter) {
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
   ZoneList<CharacterRange>* base =
       new(&zone) ZoneList<CharacterRange>(1, &zone);
   base->Add(CharacterRange::Everything(), &zone);
   UnicodeRangeSplitter splitter(&zone, base);
   // BMP
   for (uc32 c = 0; c < 0xd800; c++) {
     CHECK(InClass(c, splitter.bmp()));
     CHECK(!InClass(c, splitter.lead_surrogates()));
     CHECK(!InClass(c, splitter.trail_surrogates()));
     CHECK(!InClass(c, splitter.non_bmp()));
@@ skipping 23 matching lines @@
   for (uc32 c = 0x10000; c < 0x10ffff; c++) {
     CHECK(!InClass(c, splitter.bmp()));
     CHECK(!InClass(c, splitter.lead_surrogates()));
     CHECK(!InClass(c, splitter.trail_surrogates()));
     CHECK(InClass(c, splitter.non_bmp()));
   }
 }
 
 
 TEST(CanonicalizeCharacterSets) {
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
   ZoneList<CharacterRange>* list =
       new(&zone) ZoneList<CharacterRange>(4, &zone);
   CharacterSet set(list);
 
   list->Add(CharacterRange::Range(10, 20), &zone);
   list->Add(CharacterRange::Range(30, 40), &zone);
   list->Add(CharacterRange::Range(50, 60), &zone);
   set.Canonicalize();
   CHECK_EQ(3, list->length());
   CHECK_EQ(10, list->at(0).from());
@@ skipping 40 matching lines @@
   list->Add(CharacterRange::Range(21, 30), &zone);
   list->Add(CharacterRange::Range(20, 20), &zone);
   set.Canonicalize();
   CHECK_EQ(1, list->length());
   CHECK_EQ(10, list->at(0).from());
   CHECK_EQ(30, list->at(0).to());
 }
 
 
 TEST(CharacterRangeMerge) {
-  Zone zone(CcTest::i_isolate()->allocator());
+  Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
   ZoneList<CharacterRange> l1(4, &zone);
   ZoneList<CharacterRange> l2(4, &zone);
   // Create all combinations of intersections of ranges, both singletons and
   // longer.
 
   int offset = 0;
 
   // The five kinds of singleton intersections:
   //     X
   //   Y      - outside before
@@ skipping 169 matching lines @@
   v8::Local<v8::String> external =
       v8::String::NewExternalOneByte(isolate, new UncachedExternalString())
           .ToLocalChecked();
   CHECK(v8::Utils::OpenHandle(*external)->map() ==
         CcTest::i_isolate()->heap()->short_external_one_byte_string_map());
   v8::Local<v8::Object> global = env->Global();
   global->Set(env.local(), v8_str("external"), external).FromJust();
   CompileRun("var re = /y(.)/; re.test('ab');");
   ExpectString("external.substring(1).match(re)[1]", "z");
 }