linux-kernel - [PATCH 58/73] perf tools: Add perf_evlist__mmap_cb

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20190913132355.21634-59-jolsa@kernel.org>
Date:   Fri, 13 Sep 2019 15:23:40 +0200
From:   Jiri Olsa <jolsa@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Michael Petlan <mpetlan@...hat.com>
Subject: [PATCH 58/73] perf tools: Add perf_evlist__mmap_cb_new function

Adding perf_evlist__mmap_cb_new 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.

Link: http://lkml.kernel.org/n/tip-tiyl8aymuk3fv9j033yo8d1v@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 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 850dacf7bf97..52a6af91e877 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -725,6 +725,29 @@ 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_new(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)
 {
@@ -923,6 +946,7 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
 	};
 	struct perf_evlist_mmap_ops ops __maybe_unused = {
 		.idx = perf_evlist__mmap_cb_idx,
+		.new = perf_evlist__mmap_cb_new,
 	};
 
 	if (!evlist->mmap)
-- 
2.21.0