From bb1b1885e2f22afb8bc7981cd865fe4b0e3d975b Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Mon, 7 Oct 2019 14:53:27 +0200 Subject: perf evlist: Introduce perf_evlist__mmap_cb_get() Add the perf_evlist__mmap_cb_get() function to return 'struct perf_mmap' object during perf_evlist__mmap_ops() call. The array of 'struct mmap' is allocated via evlist__alloc_mmap(), in this callback we simply returns pointer to the base object. Signed-off-by: Jiri Olsa Cc: Alexander Shishkin Cc: Michael Petlan Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lore.kernel.org/lkml/20191007125344.14268-20-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/evlist.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index 11716f2b965a..f50ee5cb6554 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -750,6 +750,29 @@ perf_evlist__mmap_cb_idx(struct perf_evlist *_evlist, auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, idx, per_cpu); } +static struct perf_mmap* +perf_evlist__mmap_cb_get(struct perf_evlist *_evlist, bool overwrite, int idx) +{ + struct evlist *evlist = container_of(_evlist, struct evlist, core); + struct mmap *maps = evlist->mmap; + + if (overwrite) { + maps = evlist->overwrite_mmap; + + if (!maps) { + maps = evlist__alloc_mmap(evlist, true); + if (!maps) + return NULL; + + evlist->overwrite_mmap = maps; + if (evlist->bkw_mmap_state == BKW_MMAP_NOTREADY) + perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING); + } + } + + return &maps[idx].core; +} + static int evlist__mmap_per_cpu(struct evlist *evlist, struct mmap_params *mp) { @@ -948,6 +971,7 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages, }; struct perf_evlist_mmap_ops ops __maybe_unused = { .idx = perf_evlist__mmap_cb_idx, + .get = perf_evlist__mmap_cb_get, }; if (!evlist->mmap) -- cgit v1.2.3