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

src/compiler/pipeline.cc

Index: src/compiler/pipeline.cc
diff --git a/src/compiler/pipeline.cc b/src/compiler/pipeline.cc
index 1fa2d21ca972ea3b2dbce67cd04aa49833463c03..8a47635685969cc3c9210d97e8eb0030239bb86b 100644
--- a/src/compiler/pipeline.cc
+++ b/src/compiler/pipeline.cc
@@ -1094,7 +1094,7 @@ void Pipeline::RunPrintAndVerify(const char* phase, bool untyped) {
 
 
 Handle<Code> Pipeline::GenerateCode() {
-  ZonePool zone_pool;
+  ZonePool zone_pool(isolate()->allocator());
   base::SmartPointer<PipelineStatistics> pipeline_statistics;
 
   if (FLAG_turbo_stats) {
@@ -1255,7 +1255,7 @@ Handle<Code> Pipeline::GenerateCodeForCodeStub(Isolate* isolate,
   CompilationInfo info(debug_name, isolate, graph->zone(), flags);
 
   // Construct a pipeline for scheduling and code generation.
-  ZonePool zone_pool;
+  ZonePool zone_pool(isolate->allocator());
   PipelineData data(&zone_pool, &info, graph, schedule);
   base::SmartPointer<PipelineStatistics> pipeline_statistics;
   if (FLAG_turbo_stats) {
@@ -1296,7 +1296,7 @@ Handle<Code> Pipeline::GenerateCodeForTesting(CompilationInfo* info,
                                               Graph* graph,
                                               Schedule* schedule) {
   // Construct a pipeline for scheduling and code generation.
-  ZonePool zone_pool;
+  ZonePool zone_pool(info->isolate()->allocator());
   PipelineData data(&zone_pool, info, graph, schedule);
   base::SmartPointer<PipelineStatistics> pipeline_statistics;
   if (FLAG_turbo_stats) {
@@ -1319,7 +1319,7 @@ bool Pipeline::AllocateRegistersForTesting(const RegisterConfiguration* config,
                                            InstructionSequence* sequence,
                                            bool run_verifier) {
   CompilationInfo info("testing", sequence->isolate(), sequence->zone());
-  ZonePool zone_pool;
+  ZonePool zone_pool(sequence->isolate()->allocator());
   PipelineData data(&zone_pool, &info, sequence);
   Pipeline pipeline(&info);
   pipeline.data_ = &data;
@@ -1442,7 +1442,7 @@ void Pipeline::AllocateRegisters(const RegisterConfiguration* config,
   base::SmartPointer<Zone> verifier_zone;
   RegisterAllocatorVerifier* verifier = nullptr;
   if (run_verifier) {
-    verifier_zone.Reset(new Zone());
+    verifier_zone.Reset(new Zone(isolate()->allocator()));
     verifier = new (verifier_zone.get()) RegisterAllocatorVerifier(
         verifier_zone.get(), config, data->sequence());
   }