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authorMasami Hiramatsu <[email protected]>2019-11-18 17:12:00 +0900
committerArnaldo Carvalho de Melo <[email protected]>2019-11-18 18:58:25 -0300
commit1ae5d88a4eefacd4a3643170c20cf6403a24d254 (patch)
tree86f185874241fbaa2f704e0603b4e62107ad2388 /tools/perf/scripts/python/Perf-Trace-Util/lib
parent57f95bf5f88295612871c36cb0de5069e50570f8 (diff)
perf probe: Verify given line is a representive line
Verify user given probe line is a representive line (which doesn't share the address with other lines or the line is the least line among the lines which shares same address), and if not, it shows what is the representive line. Without this fix, user can put a probe on the lines which is not a a representive line. But since this is not a representive line, perf probe -l shows a representive line number instead of user given line number. e.g. (put kernel_read:3, but listed as kernel_read:2) # perf probe -a kernel_read:3 Added new event: probe:kernel_read (on kernel_read:3) You can now use it in all perf tools, such as: perf record -e probe:kernel_read -aR sleep 1 # perf probe -l probe:kernel_read (on kernel_read:[email protected]/fs/read_write.c) With this fix, perf probe doesn't allow user to put a probe on a representive line, and tell what is the representive line. # perf probe -a kernel_read:3 This line is sharing the addrees with other lines. Please try to probe at kernel_read:2 instead. Error: Failed to add events. Signed-off-by: Masami Hiramatsu <[email protected]> Reported-by: Arnaldo Carvalho de Melo <[email protected]> Tested-by: Arnaldo Carvalho de Melo <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Ravi Bangoria <[email protected]> Cc: Steven Rostedt (VMware) <[email protected]> Cc: Tom Zanussi <[email protected]> Link: http://lore.kernel.org/lkml/157406472071.24476.14915451439785001021.stgit@devnote2 Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/Perf-Trace-Util/lib')
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