On 3/29/15 5:34 PM, Jovi Zhangwei wrote:
+ snprintf(buf, sizeof(buf),
+ "echo '%c:%s %s' >>
/sys/kernel/debug/tracing/kprobe_events",
+ is_kprobe ? 'p' : 'r', event, event);
+ err = system(buf);
Maybe we need to remember cleanup the kprobe_events in debugfs?
the real tracing tool should be cleaning it up. This is sample code.
I didn't want to overcomplicate it with a chain of ctrl-c handlers.
Notice patch 7 is simply doing signal(SIGINT, int_exit) and prints
histogram when process is terminated. The kprobe cleaning logic would
have interfere with this and overall would have made these samples
unnecessary complex.
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