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SubjectRe: [RFC PATCH] arm64: perf test: Improbe bp_signal
On Tue, Jan 05, 2016 at 04:58:00AM +0000, Wang Nan wrote:

SNIP

> * Following processing should happen:
> @@ -141,6 +203,21 @@ int test__bp_signal(int subtest __maybe_unused)
> * - fd1 event breakpoint hit -> count1 == 1
> * - SIGIO is delivered -> overflows == 1
> * - fd2 event breakpoint hit -> count2 == 1
> + * - SIGUSR1 is delivered -> overflows_2 == 1 (nested signal)
> + * - sig_handler_2 return
> + * - sig_handler return
> + * - fd3 event watchpoint hit -> count3 == 1 (wp and bp in one insn)
> + * - SIGIO is delivered -> overflows == 2
> + * - fd2 event breakpoint hit -> count2 == 2
> + * - SIGUSR1 is delivered -> overflows_2 == 2
> + * - sig_handler_2 return
> + * - sig_handler return
> + * - fd3 event watchpoint hit -> count3 == 2 (standalone wp)
> + * - SIGIO is delivered -> overflows = 3
> + * - fd2 event breakpoint hit -> count2 == 3
> + * - SIGUSR1 is delivered -> overflows_2 == 3
> + * - sig_handler_2 return
> + * - sig_handler return

also each line in here could be prefixed with 'code action'
that led to the result on the line, like:


* exec: result:
*
* __test_function - fd1 event breakpoint hit -> count1 == 1
* - SIGIO is delivered -> overflows == 1
* sig_handler - fd2 event breakpoint hit -> count2 == 1
* - SIGUSR1 is delivered -> overflows_2 == 1 (nested signal)
* - sig_handler_2 return
* - sig_handler return
* incq (%rdi) - fd3 event watchpoint hit -> count3 == 1 (wp and bp in one insn)
* - SIGIO is delivered -> overflows == 2

hum.. but it might take all the fun out of it ;-)

jirka


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