perf evlist: Record mmap cookie into fdarray private field
Insetad of saving a index into fdarray entries private field, save the corresponding 'struct perf_mmap' pointer, and release them directly using perf_mmap__put(). Following commits introduce multiple mmap arrays to evlist. Without this patch, perf_evlist__munmap_filtered() is unable to retrive correct 'struct perf_mmap' pointer. Signed-off-by: Wang Nan <wangnan0@huawei.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: He Kuang <hekuang@huawei.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nilay Vaish <nilayvaish@gmail.com> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1468485287-33422-6-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -30,6 +30,7 @@
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static void perf_evlist__mmap_put(struct perf_evlist *evlist, int idx);
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static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx);
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static void perf_mmap__munmap(struct perf_mmap *map);
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static void perf_mmap__put(struct perf_mmap *map);
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#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
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#define SID(e, x, y) xyarray__entry(e->sample_id, x, y)
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@ -466,7 +467,8 @@ int perf_evlist__alloc_pollfd(struct perf_evlist *evlist)
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return 0;
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}
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static int __perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd, int idx, short revent)
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static int __perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd,
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struct perf_mmap *map, short revent)
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{
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int pos = fdarray__add(&evlist->pollfd, fd, revent | POLLERR | POLLHUP);
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/*
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@ -474,7 +476,7 @@ static int __perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd, int idx
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* close the associated evlist->mmap[] entry.
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*/
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if (pos >= 0) {
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evlist->pollfd.priv[pos].idx = idx;
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evlist->pollfd.priv[pos].ptr = map;
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fcntl(fd, F_SETFL, O_NONBLOCK);
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}
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@ -484,15 +486,16 @@ static int __perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd, int idx
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int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd)
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{
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return __perf_evlist__add_pollfd(evlist, fd, -1, POLLIN);
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return __perf_evlist__add_pollfd(evlist, fd, NULL, POLLIN);
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}
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static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd,
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void *arg __maybe_unused)
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{
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struct perf_evlist *evlist = container_of(fda, struct perf_evlist, pollfd);
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struct perf_mmap *map = fda->priv[fd].ptr;
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perf_evlist__mmap_put(evlist, fda->priv[fd].idx);
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if (map)
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perf_mmap__put(map);
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}
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int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask)
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@ -1098,7 +1101,7 @@ static int perf_evlist__mmap_per_evsel(struct perf_evlist *evlist, int idx,
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* Therefore don't add it for polling.
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*/
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if (!evsel->system_wide &&
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__perf_evlist__add_pollfd(evlist, fd, idx, revent) < 0) {
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__perf_evlist__add_pollfd(evlist, fd, &evlist->mmap[idx], revent) < 0) {
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perf_evlist__mmap_put(evlist, idx);
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return -1;
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}
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