Suppress leak detector in some cases

We intentionally leak some objects.  Prevent the ASan leak detector
from raising false alarms in these cases.

* configure.ac: Search for lsan_interface.h header.

* src/data.c (make_blv): Allow leaking of buffer-local values.

* src/buffer.c (enlarge_buffer_text): Allow leaking of buffer text.

* src/emacs-module.c (Fmodule_load, initialize_environment): Allow
intentional leak of runtime and environment objects if module
assertions are enabled.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/data.c b/src/data.c
index 1db0a983b49..c261e8e90dd 100644
--- a/src/data.c
+++ b/src/data.c
@@ -23,6 +23,10 @@ along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
 #include <math.h>
 #include <stdio.h>
 
+#ifdef HAVE_SANITIZER_LSAN_INTERFACE_H
+#include <sanitizer/lsan_interface.h>
+#endif
+
 #include <byteswap.h>
 #include <count-one-bits.h>
 #include <count-trailing-zeros.h>
@@ -1784,6 +1788,9 @@ make_blv (struct Lisp_Symbol *sym, bool forwarded,
   set_blv_defcell (blv, tem);
   set_blv_valcell (blv, tem);
   set_blv_found (blv, false);
+#ifdef HAVE_SANITIZER_LSAN_INTERFACE_H
+  __lsan_ignore_object (blv);
+#endif
   return blv;
 }