Use ELF notes to set the desired memory tagging level.
Use a note in executables to specify
(none|sync|async) heap tagging level. To be extended with (heap x stack x
globals) in the future. A missing note disables all tagging.
Bug: b/135772972
Test: bionic-unit-tests (in a future change)
Change-Id: Iab145a922c7abe24cdce17323f9e0c1063cc1321
diff --git a/libc/private/bionic_globals.h b/libc/private/bionic_globals.h
index 5c9b726..8132261 100644
--- a/libc/private/bionic_globals.h
+++ b/libc/private/bionic_globals.h
@@ -41,6 +41,8 @@
#include "private/bionic_vdso.h"
#include "private/WriteProtected.h"
+#include <platform/bionic/malloc.h>
+
struct libc_globals {
vdso_entry vdso[VDSO_END];
long setjmp_cookie;
@@ -106,6 +108,8 @@
const char* scudo_stack_depot = nullptr;
const char* scudo_region_info = nullptr;
+
+ HeapTaggingLevel initial_heap_tagging_level = M_HEAP_TAGGING_LEVEL_NONE;
};
__LIBC_HIDDEN__ libc_shared_globals* __libc_shared_globals();