code for encrypting sensitive tcmalloc metadata

third_party/tcmalloc/chromium/src/tcmalloc.cc

Index: third_party/tcmalloc/chromium/src/tcmalloc.cc
diff --git a/third_party/tcmalloc/chromium/src/tcmalloc.cc b/third_party/tcmalloc/chromium/src/tcmalloc.cc
index e88f983292714c2afa2be6e939c5ae0958cdc894..bbeca1541685d28f57f356be5bc4edafca68a7c0 100644
--- a/third_party/tcmalloc/chromium/src/tcmalloc.cc
+++ b/third_party/tcmalloc/chromium/src/tcmalloc.cc
@@ -125,6 +125,7 @@
 #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
@@ -985,6 +986,7 @@ TCMallocGuard::TCMallocGuard() {
     // 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));