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[PATCH -tip 2/3] Add coredump tracepoint
- From: Masami Hiramatsu <mhiramat at redhat dot com>
- To: Ingo Molnar <mingo at elte dot hu>, lkml<linux-kernel at vger dot kernel dot org>
- Cc: systemtap<systemtap at sources dot redhat dot com>, DLE<dle-develop at lists dot sourceforge dot net>, Masami Hiramatsu <mhiramat at redhat dot com>, Roland McGrath <roland at redhat dot com>
- Date: Fri, 13 Nov 2009 17:52:34 -0500
- Subject: [PATCH -tip 2/3] Add coredump tracepoint
- References: <20091113225226.15079.90813.stgit@harusame>
Add coredump tracepoint for tracing coredump event. This event shows coredump
caused signal, limit size, dumpable flag, dump-filter, and core name.
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Roland McGrath <roland@redhat.com>
---
fs/exec.c | 9 +++++++++
include/trace/events/sched.h | 34 ++++++++++++++++++++++++++++++++++
2 files changed, 43 insertions(+), 0 deletions(-)
diff --git a/fs/exec.c b/fs/exec.c
index dc418e3..6b77d10 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -56,6 +56,7 @@
#include <linux/fsnotify.h>
#include <linux/fs_struct.h>
#include <linux/pipe_fs_i.h>
+#include <trace/events/sched.h>
#include <asm/uaccess.h>
#include <asm/mmu_context.h>
@@ -1907,6 +1908,14 @@ void do_coredump(long signr, int exit_code, struct pt_regs *regs)
if (!ispipe && do_truncate(file->f_path.dentry, 0, 0, file) != 0)
goto close_fail;
+ /*
+ * Trace core dump event.
+ * Casting signr to int is safe because it comes from
+ * si->signo int field.
+ */
+ trace_sched_process_coredump((int)signr, core_limit, mm_flags,
+ corename);
+
retval = binfmt->core_dump(signr, regs, file, core_limit, mm_flags);
if (retval)
diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index b50b985..ff9d5fb 100644
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -320,6 +320,40 @@ TRACE_EVENT(sched_process_fork,
);
/*
+ * Tracepoint for core_dump:
+ */
+TRACE_EVENT(sched_process_coredump,
+
+ TP_PROTO(int sig, unsigned long core_limit, unsigned long mm_flags,
+ const char *core_name),
+
+ TP_ARGS(sig, core_limit, mm_flags, core_name),
+
+ TP_STRUCT__entry(
+ __field( int, sig )
+ __field( unsigned long, limit )
+ __field( unsigned long, flags )
+ __string( name, core_name )
+ ),
+
+
+ TP_fast_assign(
+ __entry->sig = sig;
+ __entry->limit = core_limit;
+ __entry->flags = mm_flags;
+ __assign_str(name, core_name);
+ ),
+
+ TP_printk("sig: %d limit: %lu dumpable: %lx dump_filter: %lx "
+ "corename: %s",
+ __entry->sig, __entry->limit,
+ __entry->flags & MMF_DUMPABLE_MASK,
+ (__entry->flags & MMF_DUMP_FILTER_MASK) >>
+ MMF_DUMP_FILTER_SHIFT,
+ __get_str(name))
+);
+
+/*
* Tracepoint for sending a signal:
*/
TRACE_EVENT(sched_signal_send,
--
Masami Hiramatsu
Software Engineer
Hitachi Computer Products (America), Inc.
Software Solutions Division
e-mail: mhiramat@redhat.com