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Subject[RFC PATCH v2] Tracepoint: add exec tracepoint
New version corrects 2 small problems.  Include linux/binfmts.h in trace/events/sched.h to provide definition of 'struct linux_binprm'.  To avoid future abi problems, add 'struct task_struct' parameter (like most of the other sched tracepoints have).

---
From: David Smith <dsmith@redhat.com>
Added general purpose exec tracepoint. The 'bprm' argument gives details of the exec.

Signed-off-by: David Smith <dsmith@redhat.com>
---
fs/exec.c | 6 +++++-
include/trace/events/sched.h | 23 +++++++++++++++++++++++
2 files changed, 28 insertions(+), 1 deletions(-)
diff --git a/fs/exec.c b/fs/exec.c
index 25dcbe5..b0f4919 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -61,6 +61,8 @@
#include <asm/tlb.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 +1403,11 @@ 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, 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 959ff18..ca8d084 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 +277,28 @@ TRACE_EVENT(sched_process_fork,
);

/*
+ * Tracepoint for exec:
+ */
+TRACE_EVENT(sched_process_exec,
+
+ TP_PROTO(struct task_struct *p, struct linux_binprm *bprm),
+
+ TP_ARGS(p, bprm),
+
+ TP_STRUCT__entry(
+ __string( filename, bprm->filename )
+ __field( pid_t, pid )
+ ),
+
+ TP_fast_assign(
+ __assign_str(filename, bprm->filename);
+ __entry->pid = p->pid;
+ ),
+
+ TP_printk("filename=%s pid=%d", __get_str(filename), __entry->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.
*/

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