Commit-ID: 5e58fcfaf4c60795c241be739ad55c519d7f2aaa Gitweb: http://git.kernel.org/tip/5e58fcfaf4c60795c241be739ad55c519d7f2aaa Author: Arnaldo Carvalho de Melo <a...@redhat.com> AuthorDate: Wed, 19 Jul 2017 14:32:11 -0300 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Thu, 20 Jul 2017 09:55:52 -0300
perf trace: Allow allocating sc->arg_fmt even without the syscall tracepoint At least "clone" doesn't have (enter, exit) entries tracefs/events/syscalls/, but we can provide a syscall_fmt and use it instead, as will be done for "clone" in the next cset. Cc: Adrian Hunter <adrian.hun...@intel.com> Cc: David Ahern <dsah...@gmail.com> Cc: Jiri Olsa <jo...@kernel.org> Cc: Namhyung Kim <namhy...@kernel.org> Cc: Wang Nan <wangn...@huawei.com> Link: http://lkml.kernel.org/n/tip-o12kejgcxddyovn2hlg4g...@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/builtin-trace.c | 31 +++++++++++++++++++++---------- 1 file changed, 21 insertions(+), 10 deletions(-) diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index 4370ce4..1c5238a 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -1165,22 +1165,31 @@ static int trace__symbols_init(struct trace *trace, struct perf_evlist *evlist) return err; } -static int syscall__set_arg_fmts(struct syscall *sc) +static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args) { - struct format_field *field; - int idx = 0, len; + int idx; - sc->arg_fmt = calloc(sc->nr_args, sizeof(*sc->arg_fmt)); + sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt)); if (sc->arg_fmt == NULL) return -1; - for (field = sc->args; field; field = field->next, ++idx) { - if (sc->fmt) { + for (idx = 0; idx < nr_args; ++idx) { + if (sc->fmt) sc->arg_fmt[idx] = sc->fmt->arg[idx]; + } - if (sc->fmt->arg[idx].scnprintf) - continue; - } + sc->nr_args = nr_args; + return 0; +} + +static int syscall__set_arg_fmts(struct syscall *sc) +{ + struct format_field *field; + int idx = 0, len; + + for (field = sc->args; field; field = field->next, ++idx) { + if (sc->fmt && sc->fmt->arg[idx].scnprintf) + continue; if (strcmp(field->type, "const char *") == 0 && (strcmp(field->name, "filename") == 0 || @@ -1251,11 +1260,13 @@ static int trace__read_syscall_info(struct trace *trace, int id) sc->tp_format = trace_event__tp_format("syscalls", tp_name); } + if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields)) + return -1; + if (IS_ERR(sc->tp_format)) return -1; sc->args = sc->tp_format->format.fields; - sc->nr_args = sc->tp_format->format.nr_fields; /* * We need to check and discard the first variable '__syscall_nr' * or 'nr' that mean the syscall number. It is needless here.
