From 97978b3e30a512beba43720365f53fea8d432c97 Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Tue, 3 Dec 2013 14:09:24 +0100 Subject: [PATCH] perf tools: Add trace-event global object for tracepoint interface In order to get the proper plugins processing we need to use full trace-event interface when creating tracepoint events. So far we were using shortcut to get the parsed format. Moving current 'event_format__new' function into trace-event object as 'trace_event__tp_format'. This function uses properly initialized global trace-event object, ensuring proper plugins processing. Signed-off-by: Jiri Olsa Cc: Corey Ashford Cc: David Ahern Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Steven Rostedt Link: http://lkml.kernel.org/r/1386076182-14484-11-git-send-email-jolsa@redhat.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-trace.c | 5 +-- tools/perf/util/evsel.c | 44 ++----------------------- tools/perf/util/trace-event.c | 61 +++++++++++++++++++++++++++++++++++ tools/perf/util/trace-event.h | 2 ++ 4 files changed, 68 insertions(+), 44 deletions(-) diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index 9f2a242fa79..56afe339661 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -11,6 +11,7 @@ #include "util/intlist.h" #include "util/thread_map.h" #include "util/stat.h" +#include "trace-event.h" #include #include @@ -1430,11 +1431,11 @@ static int trace__read_syscall_info(struct trace *trace, int id) sc->fmt = syscall_fmt__find(sc->name); snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name); - sc->tp_format = event_format__new("syscalls", tp_name); + sc->tp_format = trace_event__tp_format("syscalls", tp_name); if (sc->tp_format == NULL && sc->fmt && sc->fmt->alias) { snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias); - sc->tp_format = event_format__new("syscalls", tp_name); + sc->tp_format = trace_event__tp_format("syscalls", tp_name); } if (sc->tp_format == NULL) diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 6a046ed73f9..7b510fd1f08 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -23,6 +23,7 @@ #include "target.h" #include "perf_regs.h" #include "debug.h" +#include "trace-event.h" static struct { bool sample_id_all; @@ -180,47 +181,6 @@ struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx) return evsel; } -struct event_format *event_format__new(const char *sys, const char *name) -{ - int fd, n; - char *filename; - void *bf = NULL, *nbf; - size_t size = 0, alloc_size = 0; - struct event_format *format = NULL; - - if (asprintf(&filename, "%s/%s/%s/format", tracing_events_path, sys, name) < 0) - goto out; - - fd = open(filename, O_RDONLY); - if (fd < 0) - goto out_free_filename; - - do { - if (size == alloc_size) { - alloc_size += BUFSIZ; - nbf = realloc(bf, alloc_size); - if (nbf == NULL) - goto out_free_bf; - bf = nbf; - } - - n = read(fd, bf + size, alloc_size - size); - if (n < 0) - goto out_free_bf; - size += n; - } while (n > 0); - - pevent_parse_format(NULL, &format, bf, size, sys); - -out_free_bf: - free(bf); - close(fd); -out_free_filename: - free(filename); -out: - return format; -} - struct perf_evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int idx) { struct perf_evsel *evsel = zalloc(sizeof(*evsel)); @@ -235,7 +195,7 @@ struct perf_evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int if (asprintf(&evsel->name, "%s:%s", sys, name) < 0) goto out_free; - evsel->tp_format = event_format__new(sys, name); + evsel->tp_format = trace_event__tp_format(sys, name); if (evsel->tp_format == NULL) goto out_free; diff --git a/tools/perf/util/trace-event.c b/tools/perf/util/trace-event.c index a155a77f302..d9f5f6137ab 100644 --- a/tools/perf/util/trace-event.c +++ b/tools/perf/util/trace-event.c @@ -1,6 +1,24 @@ +#include +#include +#include +#include +#include +#include +#include +#include #include #include "trace-event.h" +#include "util.h" + +/* + * global trace_event object used by trace_event__tp_format + * + * TODO There's no cleanup call for this. Add some sort of + * __exit function support and call trace_event__cleanup + * there. + */ +static struct trace_event tevent; int trace_event__init(struct trace_event *t) { @@ -19,3 +37,46 @@ void trace_event__cleanup(struct trace_event *t) pevent_free(t->pevent); traceevent_unload_plugins(t->plugin_list); } + +static struct event_format* +tp_format(const char *sys, const char *name) +{ + struct pevent *pevent = tevent.pevent; + struct event_format *event = NULL; + char path[PATH_MAX]; + size_t size; + char *data; + + scnprintf(path, PATH_MAX, "%s/%s/%s/format", + tracing_events_path, sys, name); + + if (filename__read_str(path, &data, &size)) + return NULL; + + pevent_parse_format(pevent, &event, data, size, sys); + + free(data); + return event; +} + +struct event_format* +trace_event__tp_format(const char *sys, const char *name) +{ + static bool initialized; + + if (!initialized) { + int be = traceevent_host_bigendian(); + struct pevent *pevent; + + if (trace_event__init(&tevent)) + return NULL; + + pevent = tevent.pevent; + pevent_set_flag(pevent, PEVENT_NSEC_OUTPUT); + pevent_set_file_bigendian(pevent, be); + pevent_set_host_bigendian(pevent, be); + initialized = true; + } + + return tp_format(sys, name); +} diff --git a/tools/perf/util/trace-event.h b/tools/perf/util/trace-event.h index 75dded36a2f..3a01618c5b8 100644 --- a/tools/perf/util/trace-event.h +++ b/tools/perf/util/trace-event.h @@ -18,6 +18,8 @@ struct trace_event { int trace_event__init(struct trace_event *t); void trace_event__cleanup(struct trace_event *t); +struct event_format* +trace_event__tp_format(const char *sys, const char *name); int bigendian(void); -- 2.41.0