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perf report: Introduce special handling for pipe input

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Adds special treatment for stdin - if the user specifies '-i -'
to perf report, the intent is that the event stream be written
to stdin rather than from a disk file.

The actual handling of the '-' filename is done by the session;
this just adds a signal handler to stop reporting, and turns off
interference by the pager.

Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: fweisbec@gmail.com
Cc: rostedt@goodmis.org
Cc: k-keiichi@bx.jp.nec.com
Cc: acme@ghostprotocols.net
LKML-Reference: <1270184365-8281-4-git-send-email-tzanussi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Tom Zanussi 2010-04-01 23:59:17 -05:00 committed by Ingo Molnar
parent 529870e374
commit 46656ac7fb
1 changed files with 11 additions and 1 deletions
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12
tools/perf/builtin-report.c
View file

@ -269,6 +269,13 @@ static struct perf_event_ops event_ops = {
.read = process_read_event,
};
extern volatile int session_done;
static void sig_handler(int sig __attribute__((__unused__)))
{
session_done = 1;
}
static int __cmd_report(void)
{
int ret = -EINVAL;
@ -276,6 +283,8 @@ static int __cmd_report(void)
struct rb_node *next;
const char *help = "For a higher level overview, try: perf report --sort comm,dso";
signal(SIGINT, sig_handler);
session = perf_session__new(input_name, O_RDONLY, force);
if (session == NULL)
return -ENOMEM;
@ -465,7 +474,8 @@ int cmd_report(int argc, const char **argv, const char *prefix __used)
{
argc = parse_options(argc, argv, options, report_usage, 0);
setup_browser();
if (strcmp(input_name, "-") != 0)
setup_browser();
if (symbol__init() < 0)
return -1;