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