Get DMP to run without HEAP_PROFILE_MMAP=1

third_party/tcmalloc/chromium/src/deep-heap-profile.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // ---
 // Author: Sainbayar Sukhbaatar
 //         Dai Mikurube
 //
 
 #include "deep-heap-profile.h"
@@ skipping 227 matching lines @@
   }
   // Write maps into "|filename_prefix_|.<pid>.|dump_count_|.maps".
   WriteProcMaps(filename_prefix_, dump_count_,
                 kProfilerBufferSize, profiler_buffer_);
 
   // Reset committed sizes of buckets.
   deep_table_.ResetCommittedSize();
 
   // Allocate a list for mmap'ed regions.
   num_mmap_allocations_ = 0;
-  heap_profile_->mmap_address_map_->Iterate(CountMMap, this);
-  mmap_list_length_ = 0;
-  mmap_list_ = reinterpret_cast<MMapListEntry*>(heap_profile_->alloc_(
-      sizeof(MMapListEntry) * num_mmap_allocations_));
+  if (heap_profile_->mmap_address_map_) {
+    heap_profile_->mmap_address_map_->Iterate(CountMMap, this);
 
-  // Touch all the allocated pages.  Touching is required to avoid new page
-  // commitment while filling the list in SnapshotProcMaps.
-  for (int i = 0;
-       i < num_mmap_allocations_;
-       i += getpagesize() / 2 / sizeof(MMapListEntry))
-    mmap_list_[i].first_address = 0;
-  mmap_list_[num_mmap_allocations_ - 1].last_address = 0;
+    mmap_list_length_ = 0;
+    mmap_list_ = reinterpret_cast<MMapListEntry*>(heap_profile_->alloc_(
+        sizeof(MMapListEntry) * num_mmap_allocations_));
+
+    // Touch all the allocated pages.  Touching is required to avoid new page
+    // commitment while filling the list in SnapshotProcMaps.
+    for (int i = 0;
+         i < num_mmap_allocations_;
+         i += getpagesize() / 2 / sizeof(MMapListEntry))
+      mmap_list_[i].first_address = 0;
+    mmap_list_[num_mmap_allocations_ - 1].last_address = 0;
+  }
 
   stats_.SnapshotProcMaps(memory_residence_info_getter_, NULL, 0);
 
   // TODO(dmikurube): Eliminate dynamic memory allocation caused by snprintf.
   // glibc's snprintf internally allocates memory by alloca normally, but it
   // allocates memory by malloc if large memory is required.
 
   // Record committed sizes.
   stats_.SnapshotAllocations(this);
 
@@ skipping 424 matching lines @@
 void DeepHeapProfile::GlobalStats::SnapshotAllocations(
     DeepHeapProfile* deep_profile) {
   profiled_mmap_.Initialize();
   profiled_malloc_.Initialize();
 
   // malloc allocations.
   deep_profile->heap_profile_->alloc_address_map_->Iterate(RecordAlloc,
                                                            deep_profile);
 
   // mmap allocations.
-  deep_profile->heap_profile_->mmap_address_map_->Iterate(RecordMMap,
-                                                          deep_profile);
-  std::sort(deep_profile->mmap_list_,
-            deep_profile->mmap_list_ + deep_profile->mmap_list_length_,
-            ByFirstAddress);
+  if (deep_profile->heap_profile_->mmap_address_map_) {
+    deep_profile->heap_profile_->mmap_address_map_->Iterate(RecordMMap,
+                                                            deep_profile);
+    std::sort(deep_profile->mmap_list_,
+              deep_profile->mmap_list_ + deep_profile->mmap_list_length_,
+              ByFirstAddress);
+  }
 }
 
 void DeepHeapProfile::GlobalStats::Unparse(TextBuffer* buffer) {
   RegionStats all_total;
   RegionStats nonprofiled_total;
   for (int i = 0; i < NUMBER_OF_MAPS_REGION_TYPES; ++i) {
     all_total.AddAnotherRegionStat(all_[i]);
     nonprofiled_total.AddAnotherRegionStat(nonprofiled_[i]);
   }
 
@@ skipping 132 matching lines @@
 }
 
 DeepHeapProfile::~DeepHeapProfile() {
 }
 
 int DeepHeapProfile::FillOrderedProfile(char raw_buffer[], int buffer_size) {
   return heap_profile_->FillOrderedProfile(raw_buffer, buffer_size);
 }
 
 #endif  // DEEP_HEAP_PROFILE