From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:58462) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TTCmf-0000pK-0O for qemu-devel@nongnu.org; Tue, 30 Oct 2012 10:27:30 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TTCmV-0005MQ-LL for qemu-devel@nongnu.org; Tue, 30 Oct 2012 10:27:12 -0400 Received: from mx1.redhat.com ([209.132.183.28]:6599) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TTCmV-0005M7-Do for qemu-devel@nongnu.org; Tue, 30 Oct 2012 10:27:03 -0400 Received: from int-mx01.intmail.prod.int.phx2.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q9UER2TG028247 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Tue, 30 Oct 2012 10:27:02 -0400 From: Gerd Hoffmann Date: Tue, 30 Oct 2012 15:26:54 +0100 Message-Id: <1351607214-4007-23-git-send-email-kraxel@redhat.com> In-Reply-To: <1351607214-4007-1-git-send-email-kraxel@redhat.com> References: <1351607214-4007-1-git-send-email-kraxel@redhat.com> Subject: [Qemu-devel] [PATCH 22/22] trace: allow disabling events in events file List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Gerd Hoffmann Disable trace events prefixed with a '-'. Useful to enable a group of tracepoints with exceptions, like this: usb_xhci_port_* -usb_xhci_port_read which will enable all xhci port tracepoints except reads. Signed-off-by: Gerd Hoffmann --- trace/control.c | 9 ++++++++- 1 files changed, 8 insertions(+), 1 deletions(-) diff --git a/trace/control.c b/trace/control.c index 22d5863..be05efb 100644 --- a/trace/control.c +++ b/trace/control.c @@ -12,6 +12,8 @@ void trace_backend_init_events(const char *fname) { + int ret; + if (fname == NULL) { return; } @@ -30,7 +32,12 @@ void trace_backend_init_events(const char *fname) if ('#' == line_buf[0]) { /* skip commented lines */ continue; } - if (!trace_event_set_state(line_buf, true)) { + if ('-' == line_buf[0]) { + ret = trace_event_set_state(line_buf+1, false); + } else { + ret = trace_event_set_state(line_buf, true); + } + if (!ret) { fprintf(stderr, "error: trace event '%s' does not exist\n", line_buf); exit(1); -- 1.7.1