From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 17749 invoked by alias); 13 Nov 2009 22:52:48 -0000 Received: (qmail 17741 invoked by uid 22791); 13 Nov 2009 22:52:48 -0000 X-SWARE-Spam-Status: No, hits=-2.5 required=5.0 tests=AWL,BAYES_00,SPF_HELO_PASS,SPF_PASS X-Spam-Check-By: sourceware.org Received: from mx1.redhat.com (HELO mx1.redhat.com) (209.132.183.28) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Fri, 13 Nov 2009 22:52:44 +0000 Received: from int-mx08.intmail.prod.int.phx2.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.21]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id nADMqggi032347 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Fri, 13 Nov 2009 17:52:42 -0500 Received: from [127.0.0.1] (dhcp-100-2-46.bos.redhat.com [10.16.2.46]) by int-mx08.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id nADMqe61022847; Fri, 13 Nov 2009 17:52:41 -0500 From: Masami Hiramatsu Subject: [PATCH -tip 3/3] Add get_signal tracepoint To: Ingo Molnar , lkml Cc: systemtap, DLE, Masami Hiramatsu , Roland McGrath Date: Fri, 13 Nov 2009 22:52:00 -0000 Message-ID: <20091113225240.15079.4863.stgit@harusame> In-Reply-To: <20091113225226.15079.90813.stgit@harusame> References: <20091113225226.15079.90813.stgit@harusame> User-Agent: StGIT/0.14.3 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-IsSubscribed: yes Mailing-List: contact systemtap-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: systemtap-owner@sourceware.org X-SW-Source: 2009-q4/txt/msg00509.txt.bz2 Add a tracepoint where a process gets a signal. This tracepoint shows signal-number, sa-handler and sa-flag. Signed-off-by: Masami Hiramatsu Cc: Roland McGrath --- include/trace/events/sched.h | 26 ++++++++++++++++++++++++++ kernel/signal.c | 3 +++ 2 files changed, 29 insertions(+), 0 deletions(-) diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h index ff9d5fb..de8ca7e 100644 --- a/include/trace/events/sched.h +++ b/include/trace/events/sched.h @@ -354,6 +354,32 @@ TRACE_EVENT(sched_process_coredump, ); /* + * Tracepoint for getting a signal: + */ +TRACE_EVENT(sched_process_get_signal, + + TP_PROTO(int sig, struct k_sigaction *ka), + + TP_ARGS(sig, ka), + + TP_STRUCT__entry( + __field( int, sig ) + __field( unsigned long, sa_handler ) + __field( unsigned long, sa_flags ) + ), + + + TP_fast_assign( + __entry->sig = sig; + __entry->sa_handler = (unsigned long)ka->sa.sa_handler; + __entry->sa_flags = ka->sa.sa_flags; + ), + + TP_printk("sig: %d sa_handler: %lx sa_flags: %lx", + __entry->sig, __entry->sa_handler, __entry->sa_flags) +); + +/* * Tracepoint for sending a signal: */ TRACE_EVENT(sched_signal_send, diff --git a/kernel/signal.c b/kernel/signal.c index fe08008..44614fb 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -1859,6 +1859,9 @@ relock: ka = &sighand->action[signr-1]; } + /* Trace the actual queued signals including SIG_IGN.*/ + trace_sched_process_get_signal(signr, ka); + if (ka->sa.sa_handler == SIG_IGN) /* Do nothing. */ continue; if (ka->sa.sa_handler != SIG_DFL) { -- Masami Hiramatsu Software Engineer Hitachi Computer Products (America), Inc. Software Solutions Division e-mail: mhiramat@redhat.com