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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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