kernel/linux.git/tools/perf/util/tracepoint.c, branch v7.1

perf tracepoint: Don't scan all tracepoints to test if one exists

2024-05-09T21:46:43+00:00

In is_valid_tracepoint, rather than scanning "/sys/kernel/tracing/events/*/*" skipping any path where "/sys/kernel/tracing/events/*/*/id" doesn't exist, and then testing if "*:*" matches the tracepoint name, just use the given tracepoint name replace the ':' with '/' and see if the id file exists. This turns a nested directory search into a single file available test. Rather than return 1 for valid and 0 for invalid, return true and false. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ingo Molnar Cc: Jiri Olsa Cc: Kan Liang Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20240509153245.1990426-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf tracepoint: Fix memory leak in is_valid_tracepoint()

2023-05-02T11:36:14+00:00

When is_valid_tracepoint() returns 1, need to call put_events_file() to free `dir_path`. Fixes: 25a7d914274de386 ("perf parse-events: Use get/put_events_file()") Signed-off-by: Yang Jihong Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ian Rogers Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20230421025953.173826-1-yangjihong1@huawei.com Signed-off-by: Arnaldo Carvalho de Melo

perf parse-events: Break out tracepoint and printing

2022-08-02T19:32:26+00:00

Move print_*_events functions out of parse-events.c into a new print-events.c. Move tracepoint code into tracepoint.c or trace-event-info.c (sole user). This reduces the dependencies of parse-events.c and makes it more amenable to being a library in the future. Remove some unnecessary definitions from parse-events.h. Fix a checkpatch.pl warning on using unsigned rather than unsigned int. Fix some line length warnings too. Signed-off-by: Ian Rogers Cc: Alexander Shishkin Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephane Eranian Link: https://lore.kernel.org/r/20220729204217.250166-3-irogers@google.com [ Add include linux/stddef.h before perf_events.h for systems where __always_inline isn't pulled in before used, such as older Alpine Linux ] Signed-off-by: Arnaldo Carvalho de Melo