Expose a lower bound of malloc'd memory via heap statistics

src/regexp/jsregexp.cc

 // Copyright 2012 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 "src/regexp/jsregexp.h"
 
 #include "src/ast/ast.h"
 #include "src/base/platform/platform.h"
 #include "src/compilation-cache.h"
 #include "src/compiler.h"
@@ skipping 117 matching lines @@
 }
 
 
 // Generic RegExp methods. Dispatches to implementation specific methods.
 
 
 MaybeHandle<Object> RegExpImpl::Compile(Handle<JSRegExp> re,
                                         Handle<String> pattern,
                                         JSRegExp::Flags flags) {
   Isolate* isolate = re->GetIsolate();
-  Zone zone;
+  Zone zone(isolate->allocator());
   CompilationCache* compilation_cache = isolate->compilation_cache();
   MaybeHandle<FixedArray> maybe_cached =
       compilation_cache->LookupRegExp(pattern, flags);
   Handle<FixedArray> cached;
   bool in_cache = maybe_cached.ToHandle(&cached);
   LOG(isolate, RegExpCompileEvent(re, in_cache));
 
   Handle<Object> result;
   if (in_cache) {
     re->set_data(*cached);
@@ skipping 190 matching lines @@
   }
   return CompileIrregexp(re, sample_subject, is_one_byte);
 }
 
 
 bool RegExpImpl::CompileIrregexp(Handle<JSRegExp> re,
                                  Handle<String> sample_subject,
                                  bool is_one_byte) {
   // Compile the RegExp.
   Isolate* isolate = re->GetIsolate();
-  Zone zone;
+  Zone zone(isolate->allocator());
   PostponeInterruptsScope postpone(isolate);
   // If we had a compilation error the last time this is saved at the
   // saved code index.
   Object* entry = re->DataAt(JSRegExp::code_index(is_one_byte));
   // When arriving here entry can only be a smi, either representing an
   // uncompiled regexp, a previous compilation error, or code that has
   // been flushed.
   DCHECK(entry->IsSmi());
   int entry_value = Smi::cast(entry)->value();
   DCHECK(entry_value == JSRegExp::kUninitializedValue ||
@@ skipping 6504 matching lines @@
 
 
 void RegExpResultsCache::Clear(FixedArray* cache) {
   for (int i = 0; i < kRegExpResultsCacheSize; i++) {
     cache->set(i, Smi::FromInt(0));
   }
 }
 
 }  // namespace internal
 }  // namespace v8