perf auxtrace: Pass struct perf_mmap into mmap__read* functions

The perf_mmap struct will hold a file pointer to write the mmap's
contents, so we need to propagate it down the stack to record__write
callers instead of its member the auxtrace_mmap struct.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180913125450.21342-4-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-record.c

@@ -207,11 +207,11 @@ static int record__process_auxtrace(struct perf_tool *tool,
 }
 
 static int record__auxtrace_mmap_read(struct record *rec,
-				      struct auxtrace_mmap *mm)
+				      struct perf_mmap *map)
 {
 	int ret;
 
-	ret = auxtrace_mmap__read(mm, rec->itr, &rec->tool,
+	ret = auxtrace_mmap__read(map, rec->itr, &rec->tool,
 				  record__process_auxtrace);
 	if (ret < 0)
 		return ret;
@@ -223,11 +223,11 @@ static int record__auxtrace_mmap_read(struct record *rec,
 }
 
 static int record__auxtrace_mmap_read_snapshot(struct record *rec,
-					       struct auxtrace_mmap *mm)
+					       struct perf_mmap *map)
 {
 	int ret;
 
-	ret = auxtrace_mmap__read_snapshot(mm, rec->itr, &rec->tool,
+	ret = auxtrace_mmap__read_snapshot(map, rec->itr, &rec->tool,
 					   record__process_auxtrace,
 					   rec->opts.auxtrace_snapshot_size);
 	if (ret < 0)
@@ -245,13 +245,12 @@ static int record__auxtrace_read_snapshot_all(struct record *rec)
 	int rc = 0;
 
 	for (i = 0; i < rec->evlist->nr_mmaps; i++) {
-		struct auxtrace_mmap *mm =
-				&rec->evlist->mmap[i].auxtrace_mmap;
+		struct perf_mmap *map = &rec->evlist->mmap[i];
 
-		if (!mm->base)
+		if (!map->auxtrace_mmap.base)
 			continue;
 
-		if (record__auxtrace_mmap_read_snapshot(rec, mm) != 0) {
+		if (record__auxtrace_mmap_read_snapshot(rec, map) != 0) {
 			rc = -1;
 			goto out;
 		}
@@ -295,7 +294,7 @@ static int record__auxtrace_init(struct record *rec)
 
 static inline
 int record__auxtrace_mmap_read(struct record *rec __maybe_unused,
-			       struct auxtrace_mmap *mm __maybe_unused)
+			       struct perf_mmap *map __maybe_unused)
 {
 	return 0;
 }
@@ -529,17 +528,17 @@ static int record__mmap_read_evlist(struct record *rec, struct perf_evlist *evli
 		return 0;
 
 	for (i = 0; i < evlist->nr_mmaps; i++) {
-		struct auxtrace_mmap *mm = &maps[i].auxtrace_mmap;
+		struct perf_mmap *map = &maps[i];
 
-		if (maps[i].base) {
-			if (perf_mmap__push(&maps[i], rec, record__pushfn) != 0) {
+		if (map->base) {
+			if (perf_mmap__push(map, rec, record__pushfn) != 0) {
 				rc = -1;
 				goto out;
 			}
 		}
 
-		if (mm->base && !rec->opts.auxtrace_snapshot_mode &&
-		    record__auxtrace_mmap_read(rec, mm) != 0) {
+		if (map->auxtrace_mmap.base && !rec->opts.auxtrace_snapshot_mode &&
+		    record__auxtrace_mmap_read(rec, map) != 0) {
 			rc = -1;
 			goto out;
 		}

tools/perf/util/auxtrace.c

@@ -1193,11 +1193,12 @@ int perf_event__process_auxtrace_error(struct perf_session *session,
 	return 0;
 }
 
-static int __auxtrace_mmap__read(struct auxtrace_mmap *mm,
+static int __auxtrace_mmap__read(struct perf_mmap *map,
 				 struct auxtrace_record *itr,
 				 struct perf_tool *tool, process_auxtrace_t fn,
 				 bool snapshot, size_t snapshot_size)
 {
+	struct auxtrace_mmap *mm = &map->auxtrace_mmap;
 	u64 head, old = mm->prev, offset, ref;
 	unsigned char *data = mm->base;
 	size_t size, head_off, old_off, len1, len2, padding;
@@ -1303,18 +1304,18 @@ static int __auxtrace_mmap__read(struct auxtrace_mmap *mm,
 	return 1;
 }
 
-int auxtrace_mmap__read(struct auxtrace_mmap *mm, struct auxtrace_record *itr,
+int auxtrace_mmap__read(struct perf_mmap *map, struct auxtrace_record *itr,
 			struct perf_tool *tool, process_auxtrace_t fn)
 {
-	return __auxtrace_mmap__read(mm, itr, tool, fn, false, 0);
+	return __auxtrace_mmap__read(map, itr, tool, fn, false, 0);
 }
 
-int auxtrace_mmap__read_snapshot(struct auxtrace_mmap *mm,
+int auxtrace_mmap__read_snapshot(struct perf_mmap *map,
 				 struct auxtrace_record *itr,
 				 struct perf_tool *tool, process_auxtrace_t fn,
 				 size_t snapshot_size)
 {
-	return __auxtrace_mmap__read(mm, itr, tool, fn, true, snapshot_size);
+	return __auxtrace_mmap__read(map, itr, tool, fn, true, snapshot_size);
 }
 
 /**

tools/perf/util/auxtrace.h

@@ -33,6 +33,7 @@ union perf_event;
 struct perf_session;
 struct perf_evlist;
 struct perf_tool;
+struct perf_mmap;
 struct option;
 struct record_opts;
 struct auxtrace_info_event;
@@ -437,10 +438,10 @@ typedef int (*process_auxtrace_t)(struct perf_tool *tool,
 				  union perf_event *event, void *data1,
 				  size_t len1, void *data2, size_t len2);
 
-int auxtrace_mmap__read(struct auxtrace_mmap *mm, struct auxtrace_record *itr,
+int auxtrace_mmap__read(struct perf_mmap *map, struct auxtrace_record *itr,
 			struct perf_tool *tool, process_auxtrace_t fn);
 
-int auxtrace_mmap__read_snapshot(struct auxtrace_mmap *mm,
+int auxtrace_mmap__read_snapshot(struct perf_mmap *map,
 				 struct auxtrace_record *itr,
 				 struct perf_tool *tool, process_auxtrace_t fn,
 				 size_t snapshot_size);