code for encrypting sensitive tcmalloc metadata

third_party/tcmalloc/chromium/src/tcmalloc.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 107 matching lines @@
 #include <google/malloc_hook.h>         // for MallocHook
 #include "base/basictypes.h"            // for int64
 #include "base/commandlineflags.h"      // for RegisterFlagValidator, etc
 #include "base/dynamic_annotations.h"   // for RunningOnValgrind
 #include "base/spinlock.h"              // for SpinLockHolder
 #include "central_freelist.h"  // for CentralFreeListPadded
 #include "common.h"            // for StackTrace, kPageShift, etc
 #include "internal_logging.h"  // for ASSERT, TCMalloc_Printer, etc
 #include "linked_list.h"       // for SLL_SetNext
 #include "malloc_hook-inl.h"       // for MallocHook::InvokeNewHook, etc
+#include "metadata_encrypt.h"
 #include "page_heap.h"         // for PageHeap, PageHeap::Stats
 #include "page_heap_allocator.h"  // for PageHeapAllocator
 #include "span.h"              // for Span, DLL_Prepend, etc
 #include "stack_trace_table.h"  // for StackTraceTable
 #include "static_vars.h"       // for Static
 #include "system-alloc.h"      // for DumpSystemAllocatorStats, etc
 #include "tcmalloc_guard.h"    // for TCMallocGuard
 #include "thread_cache.h"      // for ThreadCache
 
 // We only need malloc.h for struct mallinfo.
@@ skipping 840 matching lines @@
 TCMallocGuard::TCMallocGuard() {
   if (tcmallocguard_refcount++ == 0) {
 #ifdef HAVE_TLS    // this is true if the cc/ld/libc combo support TLS
     // Check whether the kernel also supports TLS (needs to happen at runtime)
     tcmalloc::CheckIfKernelSupportsTLS();
 #endif
 #ifdef WIN32_DO_PATCHING
     // patch the windows VirtualAlloc, etc.
     PatchWindowsFunctions();    // defined in windows/patch_functions.cc
 #endif
+    tcmalloc::InitEncryption();
     tc_free(tc_malloc(1));
     ThreadCache::InitTSD();
     tc_free(tc_malloc(1));
     // Either we, or debugallocation.cc, or valgrind will control memory
     // management.  We register our extension if we're the winner.
 #ifdef TCMALLOC_USING_DEBUGALLOCATION
     // Let debugallocation register its extension.
 #else
     if (RunningOnValgrind()) {
       // Let Valgrind uses its own malloc (so don't register our extension).
@@ skipping 928 matching lines @@
   *mark = ~allocated_mark;  //  Distinctively not allocated.
 }
 
 static void MarkAllocatedRegion(void* ptr) {
   if (ptr == NULL) return;
   MarkType* mark = GetMarkLocation(ptr);
   *mark = GetMarkValue(ptr, mark);
 }
 
 #endif  // TCMALLOC_VALIDATION