[profiler] fix memory leak for code entries for runtime callstats.

src/profiler/profile-generator.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/profiler/profile-generator.h"
 
 #include "src/base/adapters.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/global-handles.h"
@@ skipping 631 matching lines @@
 
 ProfileGenerator::ProfileGenerator(Isolate* isolate,
                                    CpuProfilesCollection* profiles)
     : isolate_(isolate), profiles_(profiles) {
   RuntimeCallStats* rcs = isolate_->counters()->runtime_call_stats();
   for (int i = 0; i < RuntimeCallStats::counters_count; ++i) {
     RuntimeCallCounter* counter = &(rcs->*(RuntimeCallStats::counters[i]));
     DCHECK(counter->name());
     auto entry = new CodeEntry(CodeEventListener::FUNCTION_TAG, counter->name(),
                                CodeEntry::kEmptyNamePrefix, "native V8Runtime");
+    code_entries_.push_back(entry);
     code_map_.AddCode(reinterpret_cast<Address>(counter), entry, 1);
   }
 }
 
+ProfileGenerator::~ProfileGenerator() {
+  for (auto code_entry : code_entries_) delete code_entry;
+}
+
 void ProfileGenerator::RecordTickSample(const TickSample& sample) {
   std::vector<CodeEntry*> entries;
   // Conservatively reserve space for stack frames + pc + function + vm-state.
   // There could in fact be more of them because of inlined entries.
   entries.reserve(sample.frames_count + 3);
 
   // The ProfileNode knows nothing about all versions of generated code for
   // the same JS function. The line number information associated with
   // the latest version of generated code is used to find a source line number
   // for a JS function. Then, the detected source line is passed to
@@ skipping 106 matching lines @@
     case EXTERNAL:
       return CodeEntry::program_entry();
     case IDLE:
       return CodeEntry::idle_entry();
     default: return NULL;
   }
 }
 
 }  // namespace internal
 }  // namespace v8