From: Franck Bui-Huu Date: Thu, 23 Dec 2010 15:04:23 +0000 (+0100) Subject: perf probe: Fix short file name probe location reporting X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=32ae2ade462146729580117d9886cc9efd83dfbe;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git perf probe: Fix short file name probe location reporting After adding probes, perf-probe(1) reports the probes locations which include filenames for certain cases. But for short file names (whose length < 32), perf-probe didn't display the name correctly. It actually skipped the first character. Here's an example where 'icmp.c' was screwed: $ perf probe -n -a "icmp.c;sk=*" Add new events: probe:icmp_push_reply (on @cmp.c) probe:icmp_reply (on @cmp.c) probe:icmp_reply_1 (on @cmp.c) probe:icmp_send (on @cmp.c) probe:icmp_send_1 (on @cmp.c) probe:icmp_error (on @cmp.c) probe:icmp_error_1 (on @cmp.c) probe:icmp_error_2 (on @cmp.c) probe:icmp_error_3 (on @cmp.c) This patch fixes this bug in synthesize_perf_probe_point(). Acked-by: Masami Hiramatsu Cc: Masami Hiramatsu LKML-Reference: Signed-off-by: Franck Bui-Huu Signed-off-by: Arnaldo Carvalho de Melo --- diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index 4bde988a0b04..d3af30d62880 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -1068,13 +1068,13 @@ static char *synthesize_perf_probe_point(struct perf_probe_point *pp) goto error; } if (pp->file) { - len = strlen(pp->file) - 31; - if (len < 0) - len = 0; - tmp = strchr(pp->file + len, '/'); - if (!tmp) - tmp = pp->file + len; - ret = e_snprintf(file, 32, "@%s", tmp + 1); + tmp = pp->file; + len = strlen(tmp); + if (len > 30) { + tmp = strchr(pp->file + len - 30, '/'); + tmp = tmp ? tmp + 1 : pp->file + len - 30; + } + ret = e_snprintf(file, 32, "@%s", tmp); if (ret <= 0) goto error; }