From: Victor Julien <vjulien@oisf.net>
Date: Mon, 26 Feb 2024 09:52:09 +0000 (+0100)
Subject: detect: prepare for SIMD optimizations
X-Git-Tag: suricata-8.0.0-beta1~1674
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4ba1f44e0d882ffb6d7d93b2864c9dd405f78ea5;p=thirdparty%2Fsuricata.git

detect: prepare for SIMD optimizations

Make rule group head bitarray 16 bytes aligned and padded to 16 bytes
boundaries to assist SIMD operations in follow up commits.
---

diff --git a/src/detect-engine-siggroup.c b/src/detect-engine-siggroup.c
index 004659b1b1..8b783b90e4 100644
--- a/src/detect-engine-siggroup.c
+++ b/src/detect-engine-siggroup.c
@@ -64,7 +64,7 @@ void SigGroupHeadInitDataFree(SigGroupHeadInitData *sghid)
         sghid->match_array = NULL;
     }
     if (sghid->sig_array != NULL) {
-        SCFree(sghid->sig_array);
+        SCFreeAligned(sghid->sig_array);
         sghid->sig_array = NULL;
     }
     if (sghid->app_mpms != NULL) {
@@ -92,9 +92,12 @@ static SigGroupHeadInitData *SigGroupHeadInitDataAlloc(uint32_t size)
         return NULL;
 
     /* initialize the signature bitarray */
-    sghid->sig_size = size;
-    if ((sghid->sig_array = SCCalloc(1, sghid->sig_size)) == NULL)
+    size = sghid->sig_size = size + 16 - (size % 16);
+    void *ptr = SCMallocAligned(sghid->sig_size, 16);
+    if (ptr == NULL)
         goto error;
+    memset(ptr, 0, size);
+    sghid->sig_array = ptr;
 
     return sghid;
 error: