A deeper heap profile dumper in third_party/tcmalloc/chromium.

third_party/tcmalloc/chromium/src/heap-profiler.cc

 // Copyright (c) 2005, Google Inc.
 // 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
@@ skipping 50 matching lines @@
 #include "base/basictypes.h"   // for PRId64, among other things
 #include "base/googleinit.h"
 #include "base/commandlineflags.h"
 #include "malloc_hook-inl.h"
 #include "tcmalloc_guard.h"
 #include <google/malloc_hook.h>
 #include <google/malloc_extension.h>
 #include "base/spinlock.h"
 #include "base/low_level_alloc.h"
 #include "base/sysinfo.h"      // for GetUniquePathFromEnv()
+#include "deep-heap-profile.h"
 #include "heap-profile-table.h"
 #include "memory_region_map.h"
 
 
 #ifndef PATH_MAX
 #ifdef MAXPATHLEN
 #define PATH_MAX        MAXPATHLEN
 #else
 #define PATH_MAX        4096         // seems conservative for max filename len!
 #endif
@@ skipping 33 matching lines @@
 DEFINE_bool(mmap_log,
             EnvToBool("HEAP_PROFILE_MMAP_LOG", false),
             "Should mmap/munmap calls be logged?");
 DEFINE_bool(mmap_profile,
             EnvToBool("HEAP_PROFILE_MMAP", false),
             "If heap-profiling is on, also profile mmap, mremap, and sbrk)");
 DEFINE_bool(only_mmap_profile,
             EnvToBool("HEAP_PROFILE_ONLY_MMAP", false),
             "If heap-profiling is on, only profile mmap, mremap, and sbrk; "
             "do not profile malloc/new/etc");
+DEFINE_bool(deep_heap_profile,
+            EnvToBool("DEEP_HEAP_PROFILE", false),
+            "If heap-profiling is on, profile deeper (only on Linux)");
 
 
 //----------------------------------------------------------------------
 // Locking
 //----------------------------------------------------------------------
 
 // A pthread_mutex has way too much lock contention to be used here.
 //
 // I would like to use Mutex, but it can call malloc(),
 // which can cause us to fall into an infinite recursion.
@@ skipping 38 matching lines @@
 static bool  dumping = false;         // Dumping status to prevent recursion
 static char* filename_prefix = NULL;  // Prefix used for profile file names
                                       // (NULL if no need for dumping yet)
 static int   dump_count = 0;          // How many dumps so far
 static int64 last_dump_alloc = 0;     // alloc_size when did we last dump
 static int64 last_dump_free = 0;      // free_size when did we last dump
 static int64 high_water_mark = 0;     // In-use-bytes at last high-water dump
 static int64 last_dump_time = 0;      // The time of the last dump
 
 static HeapProfileTable* heap_profile = NULL;  // the heap profile table
+static DeepHeapProfile* deep_profile = NULL;  // deep memory profiler
 
 //----------------------------------------------------------------------
 // Profile generation
 //----------------------------------------------------------------------
 
 // Input must be a buffer of size at least 1MB.
 static char* DoGetHeapProfileLocked(char* buf, int buflen) {
   // We used to be smarter about estimating the required memory and
   // then capping it to 1MB and generating the profile into that.
   if (buf == NULL || buflen < 1)
     return NULL;
 
   RAW_DCHECK(heap_lock.IsHeld(), "");
   int bytes_written = 0;
   if (is_on) {
     if (FLAGS_mmap_profile) {
       heap_profile->RefreshMMapData();
     }
-    bytes_written = heap_profile->FillOrderedProfile(buf, buflen - 1);
+    if (deep_profile) {
+      bytes_written = deep_profile->FillOrderedProfile(buf, buflen - 1);
+    } else {
+      bytes_written = heap_profile->FillOrderedProfile(buf, buflen - 1);
+    }
     if (FLAGS_mmap_profile) {
       heap_profile->ClearMMapData();
     }
   }
   buf[bytes_written] = '\0';
   RAW_DCHECK(bytes_written == strlen(buf), "");
 
   return buf;
 }
 
@@ skipping 245 matching lines @@
       reinterpret_cast<char*>(ProfilerMalloc(kProfileBufferSize));
 
   heap_profile = new(ProfilerMalloc(sizeof(HeapProfileTable)))
                    HeapProfileTable(ProfilerMalloc, ProfilerFree);
 
   last_dump_alloc = 0;
   last_dump_free = 0;
   high_water_mark = 0;
   last_dump_time = 0;
 
+  if (FLAGS_deep_heap_profile) {
+    // Initialize deep memory profiler
+    RAW_VLOG(0, "[%d] Starting a deep memory profiler", getpid());
+    deep_profile = new(ProfilerMalloc(sizeof(DeepHeapProfile)))
+        DeepHeapProfile(heap_profile, prefix);
+  }
+
   // We do not reset dump_count so if the user does a sequence of
   // HeapProfilerStart/HeapProfileStop, we will get a continuous
   // sequence of profiles.
 
   if (FLAGS_only_mmap_profile == false) {
     // Now set the hooks that capture new/delete and malloc/free.
     RAW_CHECK(MallocHook::AddNewHook(&NewHook), "");
     RAW_CHECK(MallocHook::AddDeleteHook(&DeleteHook), "");
   }
 
@@ skipping 21 matching lines @@
     RAW_CHECK(MallocHook::RemoveDeleteHook(&DeleteHook), "");
   }
   if (FLAGS_mmap_log) {
     // Restore mmap/sbrk hooks, checking that our hooks were set:
     RAW_CHECK(MallocHook::RemoveMmapHook(&MmapHook), "");
     RAW_CHECK(MallocHook::RemoveMremapHook(&MremapHook), "");
     RAW_CHECK(MallocHook::RemoveSbrkHook(&SbrkHook), "");
     RAW_CHECK(MallocHook::RemoveMunmapHook(&MunmapHook), "");
   }
 
+  if (deep_profile) {
+    // free deep memory profiler
+    deep_profile->~DeepHeapProfile();
+    ProfilerFree(deep_profile);
+    deep_profile = NULL;
+  }
+
   // free profile
   heap_profile->~HeapProfileTable();
   ProfilerFree(heap_profile);
   heap_profile = NULL;
 
   // free output-buffer memory
   ProfilerFree(global_profiler_buffer);
 
   // free prefix
   ProfilerFree(filename_prefix);
@@ skipping 44 matching lines @@
 
 // class used for finalization -- dumps the heap-profile at program exit
 struct HeapProfileEndWriter {
   ~HeapProfileEndWriter() { HeapProfilerDump("Exiting"); }
 };
 
 // We want to make sure tcmalloc is up and running before starting the profiler
 static const TCMallocGuard tcmalloc_initializer;
 REGISTER_MODULE_INITIALIZER(heapprofiler, HeapProfilerInit());
 static HeapProfileEndWriter heap_profile_end_writer;