diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2021-04-30 10:03:03 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-05-12 12:43:11 -0300 |
| commit | 6aa3afc9c8b7bca75640e5aaa67f04dcb158b325 (patch) | |
| tree | 78967f236571ef3bcb28e854fa65488a9e1f64f8 /tools/perf/util/auxtrace.c | |
| parent | 83d7f5f1ad0ec6072bb5b4ca32795f0c199424e2 (diff) | |
perf auxtrace: Allow buffers to be mapped read / write
To support in-place update, allow buffers to be mapped read / write.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20210430070309.17624-7-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/auxtrace.c')
| -rw-r--r-- | tools/perf/util/auxtrace.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c index 87a9220938e3..62268f8b6c4f 100644 --- a/tools/perf/util/auxtrace.c +++ b/tools/perf/util/auxtrace.c @@ -1120,8 +1120,9 @@ int auxtrace_queue_data(struct perf_session *session, bool samples, bool events) auxtrace_queue_data_cb, &qd); } -void *auxtrace_buffer__get_data(struct auxtrace_buffer *buffer, int fd) +void *auxtrace_buffer__get_data_rw(struct auxtrace_buffer *buffer, int fd, bool rw) { + int prot = rw ? PROT_READ | PROT_WRITE : PROT_READ; size_t adj = buffer->data_offset & (page_size - 1); size_t size = buffer->size + adj; off_t file_offset = buffer->data_offset - adj; @@ -1130,7 +1131,7 @@ void *auxtrace_buffer__get_data(struct auxtrace_buffer *buffer, int fd) if (buffer->data) return buffer->data; - addr = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, file_offset); + addr = mmap(NULL, size, prot, MAP_SHARED, fd, file_offset); if (addr == MAP_FAILED) return NULL; |