linux-kernel - [REPOST RFC PATCH v3] Tracepoint: add exec tracepoint

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 07 Feb 2012 10:11:05 -0600
From:	David Smith <dsmith@...hat.com>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
CC:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...e.hu>,
	Pedro Alves <pedro@...esourcery.com>
Subject: [REPOST RFC PATCH v3] Tracepoint: add exec tracepoint

Added general purpose exec tracepoint. Exec is an important major
event in the life of a task (like fork or exit). If you want to watch
a task start up, when it gets exec'ed is a good place to start.  With
the addition of this tracepoint, exec's can be monitored and better
picture of general system activity can be obtained. This tracepoint
will also enable better process life tracking, allowing you to answer
questions like "what process keeps starting up process X?".

This tracepoint can also be useful in ftrace filtering (i.e. starting
or stopping filtering when exec is called)

Signed-off-by: David Smith <dsmith@...hat.com>
---
 fs/exec.c                    |    8 +++++++-
 include/trace/events/sched.h |   27 +++++++++++++++++++++++++++
 2 files changed, 34 insertions(+), 1 deletions(-)

diff --git a/fs/exec.c b/fs/exec.c
index aeb135c..231e188 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -63,6 +63,8 @@
 #include <trace/events/task.h>
 #include "internal.h"
 
+#include <trace/events/sched.h>
+
 int core_uses_pid;
 char core_pattern[CORENAME_MAX_SIZE] = "core";
 unsigned int core_pipe_limit;
@@ -1401,9 +1403,13 @@ int search_binary_handler(struct linux_binprm *bprm,struct pt_regs *regs)
 			 */
 			bprm->recursion_depth = depth;
 			if (retval >= 0) {
-				if (depth == 0)
+				if (depth == 0) {
+					trace_sched_process_exec(current,
+								 old_pid,
+								 bprm);
 					ptrace_event(PTRACE_EVENT_EXEC,
 							old_pid);
+				}
 				put_binfmt(fmt);
 				allow_write_access(bprm->file);
 				if (bprm->file)
diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index 6ba596b..e61ddfe 100644
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -6,6 +6,7 @@
 
 #include <linux/sched.h>
 #include <linux/tracepoint.h>
+#include <linux/binfmts.h>
 
 /*
  * Tracepoint for calling kthread_stop, performed to end a kthread:
@@ -276,6 +277,32 @@ TRACE_EVENT(sched_process_fork,
 );
 
 /*
+ * Tracepoint for exec:
+ */
+TRACE_EVENT(sched_process_exec,
+
+	TP_PROTO(struct task_struct *p, pid_t old_pid,
+		 struct linux_binprm *bprm),
+
+	TP_ARGS(p, old_pid, bprm),
+
+	TP_STRUCT__entry(
+		__string(	filename,	bprm->filename	)
+		__field(	pid_t,		pid		)
+		__field(	pid_t,		old_pid		)
+	),
+
+	TP_fast_assign(
+		__assign_str(filename, bprm->filename);
+		__entry->pid		= p->pid;
+		__entry->old_pid	= p->pid;
+	),
+
+	TP_printk("filename=%s pid=%d old_pid=%d", __get_str(filename),
+		  __entry->pid, __entry->old_pid)
+);
+
+/*
  * XXX the below sched_stat tracepoints only apply to SCHED_OTHER/BATCH/IDLE
  *     adding sched_stat support to SCHED_FIFO/RR would be welcome.
  */
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/