From bcb88ba28acfe272977e9d913fc2b12e5f2b07be Mon Sep 17 00:00:00 2001
From: Doug MacEachern <dougm@apache.org>
Date: Thu, 29 Nov 2001 04:06:05 +0000
Subject: [PATCH] carry over from 1.3: disable profiling in the parent process
 #ifdef GPROF PR: Obtained from: Submitted by: Reviewed by:

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@92230 13f79535-47bb-0310-9956-ffa450edef68
---
 include/ap_mpm.h             | 14 ++++++++++++++
 server/main.c                |  2 ++
 server/mpm/prefork/prefork.c |  5 +++++
 3 files changed, 21 insertions(+)

diff --git a/include/ap_mpm.h b/include/ap_mpm.h
index 96c24a8904..bf16e9f982 100644
--- a/include/ap_mpm.h
+++ b/include/ap_mpm.h
@@ -183,4 +183,18 @@ AP_DECLARE(apr_status_t) ap_os_create_privileged_process(
  */
 AP_DECLARE(apr_status_t) ap_mpm_query(int query_code, int *result);
 
+/* Defining GPROF when compiling uses the moncontrol() function to
+ * disable gprof profiling in the parent, and enable it only for
+ * request processing in children (or in one_process mode).  It's
+ * absolutely required to get useful gprof results under linux
+ * because the profile itimers and such are disabled across a
+ * fork().  It's probably useful elsewhere as well.
+ */
+#ifdef GPROF
+extern void moncontrol(int);
+#define AP_MONCONTROL(x) moncontrol(x)
+#else
+#define AP_MONCONTROL(x)
+#endif
+
 #endif
diff --git a/server/main.c b/server/main.c
index 7bbee310d7..677ef0bb73 100644
--- a/server/main.c
+++ b/server/main.c
@@ -298,6 +298,8 @@ int main(int argc, const char * const argv[])
     module **mod;
     const char *optarg;
 
+    AP_MONCONTROL(0); /* turn of profiling of startup */
+
     apr_initialize();
 
     process = create_process(argc, argv);
diff --git a/server/mpm/prefork/prefork.c b/server/mpm/prefork/prefork.c
index cba8eb7e00..6bba1ef20c 100644
--- a/server/mpm/prefork/prefork.c
+++ b/server/mpm/prefork/prefork.c
@@ -759,6 +759,7 @@ static int make_child(server_rec *s, int slot)
 	}
 #endif
 	RAISE_SIGSTOP(MAKE_CHILD);
+        AP_MONCONTROL(1);
         /* Disable the parent's signal handlers and set up proper handling in
          * the child.
 	 */
@@ -970,6 +971,10 @@ int ap_mpm_run(apr_pool_t *_pconf, apr_pool_t *plog, server_rec *s)
 
     set_signals();
 
+    if (one_process) {
+        AP_MONCONTROL(1);
+    }
+
     if (ap_daemons_max_free < ap_daemons_min_free + 1)	/* Don't thrash... */
 	ap_daemons_max_free = ap_daemons_min_free + 1;
 
-- 
2.40.0