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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-12-18 14:54:19 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-12-18 20:15:19 +0100 |
| commit | 9614b8d697350d529743702f095b3db3f6d5a889 (patch) | |
| tree | f292f72a2fe719831b13b3bf34b87e38a1348ff0 | |
| parent | perf trace: Move strarrays to beauty.h for further reuse (diff) | |
| download | linux-9614b8d697350d529743702f095b3db3f6d5a889.tar.xz linux-9614b8d697350d529743702f095b3db3f6d5a889.zip | |
perf trace: When showing string prefixes show prefix + ??? for unknown entries
To match 'strace' output, like in:
arch_prctl(0x3001 /* ARCH_??? */, 0x7ffc8a92dc80) = -1 EINVAL (Invalid argument)
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-kx59j2dk5l1x04ou57mt99ck@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/builtin-trace.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index 9d30e0f3b7ea..6d9be952e3a7 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -365,8 +365,12 @@ size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const cha { int idx = val - sa->offset; - if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) - return scnprintf(bf, size, intfmt, val); + if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) { + size_t printed = scnprintf(bf, size, intfmt, val); + if (show_prefix) + printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix); + return printed; + } return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); } @@ -388,6 +392,7 @@ static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size, size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) { + size_t printed; int i; for (i = 0; i < sas->nr_entries; ++i) { @@ -401,7 +406,10 @@ size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const } } - return scnprintf(bf, size, intfmt, val); + printed = scnprintf(bf, size, intfmt, val); + if (show_prefix) + printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix); + return printed; } size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size, |