git: 52e125c2bd30 - main - TSLOG: Report final execname, not first

[Colin Percival]

The branch main has been updated by cperciva:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=52e125c2bd302982c179ecc920cc9a6e166033d6

commit 52e125c2bd302982c179ecc920cc9a6e166033d6
Author:     Colin Percival <cperc...@freebsd.org>
AuthorDate: 2021-10-17 20:36:38 +0000
Commit:     Colin Percival <cperc...@freebsd.org>
CommitDate: 2021-10-17 20:36:38 +0000

    TSLOG: Report final execname, not first
    
    In cases such as daemons launched via limits(1), a process may call
    exec multiple times; the last name of the last binary executed is
    usually (always?) more informative.
    
    Fixes:  46dd801acb23 Add userland boot profiling to TSLOG
    Sponsored by:   https://www.patreon.com/cperciva
---
 sys/kern/kern_tslog.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sys/kern/kern_tslog.c b/sys/kern/kern_tslog.c
index 38c91911ec08..0e7ad3c9ff23 100644
--- a/sys/kern/kern_tslog.c
+++ b/sys/kern/kern_tslog.c
@@ -169,8 +169,9 @@ tslog_user(pid_t pid, pid_t ppid, const char * execname, 
const char * namei)
 
        /* If we have an execname, record it. */
        if (execname != NULL) {
-               if (procs[pid].execname == NULL)
-                       procs[pid].execname = strdup(execname, M_TSLOGUSER);
+               if (procs[pid].execname != NULL)
+                       free(procs[pid].execname, M_TSLOGUSER);
+               procs[pid].execname = strdup(execname, M_TSLOGUSER);
                return;
        }