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Add a maximum size argument to avoid too much output that may happen for uncore events. Rename as scnprintf is no longer used. Signed-off-by: Ian Rogers --- tools/perf/builtin-record.c | 9 ++++++--- tools/perf/util/evlist.c | 21 ++++++++++++--------- tools/perf/util/evlist.h | 3 ++- 3 files changed, 20 insertions(+), 13 deletions(-) diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index ba20bf7c011d..9a3f7d9f881d 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -51,6 +51,7 @@ #include "util/clockid.h" #include "util/off_cpu.h" #include "util/bpf-filter.h" +#include "util/strbuf.h" #include "asm/bug.h" #include "perf.h" #include "cputopo.h" @@ -2784,13 +2785,15 @@ static int __cmd_record(struct record *rec, int arg= c, const char **argv) record__auxtrace_snapshot_exit(rec); =20 if (forks && workload_exec_errno) { - char msg[STRERR_BUFSIZE], strevsels[2048]; + char msg[STRERR_BUFSIZE]; const char *emsg =3D str_error_r(workload_exec_errno, msg, sizeof(msg)); + struct strbuf sb =3D STRBUF_INIT; =20 - evlist__scnprintf_evsels(rec->evlist, sizeof(strevsels), strevsels); + evlist__format_evsels(rec->evlist, &sb, 2048); =20 pr_err("Failed to collect '%s' for the '%s' workload: %s\n", - strevsels, argv[0], emsg); + sb.buf, argv[0], emsg); + strbuf_release(&sb); err =3D -1; goto out_child; } diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index c1a04141aed0..ffb5be41a465 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -35,6 +35,7 @@ #include "util/util.h" #include "util/env.h" #include "util/intel-tpebs.h" +#include "util/strbuf.h" #include #include #include @@ -2468,23 +2469,25 @@ struct evsel *evlist__find_evsel(struct evlist *evl= ist, int idx) return NULL; } =20 -int evlist__scnprintf_evsels(struct evlist *evlist, size_t size, char *bf) +void evlist__format_evsels(struct evlist *evlist, struct strbuf *sb, size_= t max_length) { struct evsel *evsel; - int printed =3D 0; + bool first =3D true; =20 evlist__for_each_entry(evlist, evsel) { if (evsel__is_dummy_event(evsel)) continue; - if (size > (strlen(evsel__name(evsel)) + (printed ? 2 : 1))) { - printed +=3D scnprintf(bf + printed, size - printed, "%s%s", printed ? = "," : "", evsel__name(evsel)); - } else { - printed +=3D scnprintf(bf + printed, size - printed, "%s...", printed ?= "," : ""); - break; + + if (!first) + strbuf_addch(sb, ','); + + if (sb->len > max_length) { + strbuf_addstr(sb, "..."); + return; } + strbuf_addstr(sb, evsel__name(evsel)); + first =3D false; } - - return printed; } =20 void evlist__check_mem_load_aux(struct evlist *evlist) diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h index edcbf1c10e92..21f6bff319fd 100644 --- a/tools/perf/util/evlist.h +++ b/tools/perf/util/evlist.h @@ -20,6 +20,7 @@ struct pollfd; struct thread_map; struct perf_cpu_map; struct record_opts; +struct strbuf; struct target; =20 /* @@ -430,7 +431,7 @@ int event_enable_timer__process(struct event_enable_tim= er *eet); =20 struct evsel *evlist__find_evsel(struct evlist *evlist, int idx); =20 -int evlist__scnprintf_evsels(struct evlist *evlist, size_t size, char *bf); +void evlist__format_evsels(struct evlist *evlist, struct strbuf *sb, size_= t max_length); void evlist__check_mem_load_aux(struct evlist *evlist); void evlist__warn_user_requested_cpus(struct evlist *evlist, const char *c= pu_list); void evlist__uniquify_name(struct evlist *evlist); --=20 2.49.0.504.g3bcea36a83-goog