From: Flole998 <Flole998@users.noreply.github.com>
Date: Sun, 18 Feb 2024 23:02:30 +0000 (+0000)
Subject: Replace poison memset by memset_s to avoid compiler optimizing it out
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c7a63e7e3b7c15d6f2c1048efafbaaa5a854ea7d;p=thirdparty%2Ftvheadend.git

Replace poison memset by memset_s to avoid compiler optimizing it out
---

diff --git a/src/input/mpegts/mpegts_table.c b/src/input/mpegts/mpegts_table.c
index dd88aaca0..3f7380db6 100644
--- a/src/input/mpegts/mpegts_table.c
+++ b/src/input/mpegts/mpegts_table.c
@@ -115,6 +115,7 @@ mpegts_table_dispatch
 void
 mpegts_table_release_ ( mpegts_table_t *mt )
 {
+  int mt_size = sizeof(*mt);
   dvb_table_release((mpegts_psi_table_t *)mt);
   tvhtrace(LS_MPEGTS, "table: mux %p free %s %02X/%02X (%d) pid %04X (%d)",
            mt->mt_mux, mt->mt_name, mt->mt_table, mt->mt_mask, mt->mt_table,
@@ -127,7 +128,14 @@ mpegts_table_release_ ( mpegts_table_t *mt )
   tprofile_done(&mt->mt_profile);
   if (tvhtrace_enabled()) {
     /* poison */
-    memset(mt, 0xa5, sizeof(*mt));
+    #ifdef __STDC_LIB_EXT1__
+    memset_s(mt, sizeof(*mt), 0xa5, sizeof(*mt));
+    #else
+    volatile unsigned char *p = (unsigned char*)mt;
+    while (mt_size--){
+      *p++ = 0xa5;
+    }
+    #endif
   }
   free(mt);
 }
diff --git a/src/tvheadend.h b/src/tvheadend.h
index 7a6aa820b..23f58cbd9 100644
--- a/src/tvheadend.h
+++ b/src/tvheadend.h
@@ -18,6 +18,8 @@
 #ifndef TVHEADEND_H
 #define TVHEADEND_H
 
+#define __STDC_WANT_LIB_EXT1__ 1
+
 #include "build.h"
 
 #include <stdlib.h>