commit 4bea4c631f747cc6b570ecd42c744a9b1103bf28
author Dmitriy Ivanov <dimitry@google.com> Fri Aug 08 16:57:15 2014 -0700
committer Dmitriy Ivanov <dimitry@google.com> Wed Aug 13 18:15:29 2014 -0700
tree 6c8bc565ee133602d54fedaa17a04c60aaa92c96
parent 8a84d383fb74135e928d341baa180c55854f2f42

Label pages mapped by linker_allocator

(cherry picked from commit 51a22a12ab370933a35463f5c81223132ec64dcb)

Bug: 17013324
Change-Id: I345c9d0fecc29d3626c5be01cc3c0ed1583ac361

linker/linker_allocator.cpp

diff --git a/linker/linker_allocator.cpp b/linker/linker_allocator.cpp
index f5d3745..92220e8 100644
--- a/linker/linker_allocator.cpp
+++ b/linker/linker_allocator.cpp
@@ -18,6 +18,8 @@
 #include <sys/mman.h>
 #include <unistd.h>
 
+#include "private/bionic_prctl.h"
+
 struct LinkerAllocatorPage {
   LinkerAllocatorPage* next;
   uint8_t bytes[PAGE_SIZE-sizeof(LinkerAllocatorPage*)];
@@ -96,6 +98,9 @@
   if (page == MAP_FAILED) {
     abort(); // oom
   }
+
+  prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, page, PAGE_SIZE, "linker_alloc");
+
   memset(page, 0, PAGE_SIZE);
 
   FreeBlockInfo* first_block = reinterpret_cast<FreeBlockInfo*>(page->bytes);