From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:48271) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RGmLp-00049t-AC for qemu-devel@nongnu.org; Thu, 20 Oct 2011 02:43:38 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RGmLi-0007mp-C9 for qemu-devel@nongnu.org; Thu, 20 Oct 2011 02:43:32 -0400 Received: from e28smtp01.in.ibm.com ([122.248.162.1]:52575) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RGmLh-0007mG-9l for qemu-devel@nongnu.org; Thu, 20 Oct 2011 02:43:30 -0400 Received: from d28relay03.in.ibm.com (d28relay03.in.ibm.com [9.184.220.60]) by e28smtp01.in.ibm.com (8.14.4/8.13.1) with ESMTP id p9K6hP36023238 for ; Thu, 20 Oct 2011 12:13:25 +0530 Received: from d28av03.in.ibm.com (d28av03.in.ibm.com [9.184.220.65]) by d28relay03.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id p9K6hOVm3715244 for ; Thu, 20 Oct 2011 12:13:25 +0530 Received: from d28av03.in.ibm.com (loopback [127.0.0.1]) by d28av03.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id p9K6hOvE016216 for ; Thu, 20 Oct 2011 17:43:24 +1100 From: Mark Wu Date: Thu, 20 Oct 2011 14:42:39 +0800 Message-Id: <1319092959-23944-1-git-send-email-wudxw@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH v2 5/6] trace: Enable "-trace events" argument to control initial state of groups List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: stefanha@linux.vnet.ibm.com Cc: qemu-devel@nongnu.org A group of trace events can be enabled in early running stage through adding its group name prefixed with "group:" to trace events list file which is passed to "-trace events". Signed-off-by: Mark Wu --- trace/control.c | 17 +++++++++++++++++ 1 files changed, 17 insertions(+), 0 deletions(-) diff --git a/trace/control.c b/trace/control.c index 4c5527d..18e14a1 100644 --- a/trace/control.c +++ b/trace/control.c @@ -23,10 +23,27 @@ void trace_backend_init_events(const char *fname) exit(1); } char line_buf[1024]; + char *group; + while (fgets(line_buf, sizeof(line_buf), fp)) { size_t len = strlen(line_buf); if (len > 1) { /* skip empty lines */ line_buf[len - 1] = '\0'; + group = strstr(line_buf, "group:"); + if (group != NULL) { + group += strlen("group:"); + if (group == NULL) { + fprintf(stderr, "error: empty group name\n"); + exit(1); + } + if (!trace_event_group_set_state(group, true)) { + fprintf(stderr, "error: trace event group '%s'" + "does not exist\n", group); + exit(1); + } + continue; + } + if (!trace_event_set_state(line_buf, true)) { fprintf(stderr, "error: trace event '%s' does not exist\n", line_buf); -- 1.7.1