perf dso: Add reference count checking and accessor functions

Add reference count checking to struct dso, this can help with
implementing correct reference counting discipline. To avoid
RC_CHK_ACCESS everywhere, add accessor functions for the variables in
struct dso.

The majority of the change is mechanical in nature and not easy to
split up.

Committer testing:

'perf test' up to this patch shows no regressions.

But:

  util/symbol.c: In function ‘dso__load_bfd_symbols’:
  util/symbol.c:1683:9: error: too few arguments to function ‘dso__set_adjust_symbols’
   1683 |         dso__set_adjust_symbols(dso);
        |         ^~~~~~~~~~~~~~~~~~~~~~~
  In file included from util/symbol.c:21:
  util/dso.h:268:20: note: declared here
    268 | static inline void dso__set_adjust_symbols(struct dso *dso, bool val)
        |                    ^~~~~~~~~~~~~~~~~~~~~~~
  make[6]: *** [/home/acme/git/perf-tools-next/tools/build/Makefile.build:106: /tmp/tmp.ZWHbQftdN6/util/symbol.o] Error 1
    MKDIR   /tmp/tmp.ZWHbQftdN6/tests/workloads/
  make[6]: *** Waiting for unfinished jobs....

This was updated:

  -       symbols__fixup_end(&dso->symbols, false);
  -       symbols__fixup_duplicate(&dso->symbols);
  -       dso->adjust_symbols = 1;
  +       symbols__fixup_end(dso__symbols(dso), false);
  +       symbols__fixup_duplicate(dso__symbols(dso));
  +       dso__set_adjust_symbols(dso);

But not build tested with BUILD_NONDISTRO and libbfd devel files installed
(binutils-devel on fedora).

Add the missing argument:

   	symbols__fixup_end(dso__symbols(dso), false);
   	symbols__fixup_duplicate(dso__symbols(dso));
  -	dso__set_adjust_symbols(dso);
  +	dso__set_adjust_symbols(dso, true);

Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Ben Gainey <ben.gainey@arm.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: Chengen Du <chengen.du@canonical.com>
Cc: Colin Ian King <colin.i.king@gmail.com>
Cc: Dima Kogan <dima@secretsauce.net>
Cc: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Li Dong <lidong@vivo.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paran Lee <p4ranlee@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <song@kernel.org>
Cc: Sun Haiyong <sunhaiyong@loongson.cn>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Tiezhu Yang <yangtiezhu@loongson.cn>
Cc: Yanteng Si <siyanteng@loongson.cn>
Cc: zhaimingbing <zhaimingbing@cmss.chinamobile.com>
Link: https://lore.kernel.org/r/20240504213803.218974-6-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 35 insertions, 36 deletions

diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
index ce5e28eaad90..a212678d47be 100644
--- a/tools/perf/builtin-inject.c
+++ b/tools/perf/builtin-inject.c
@@ -445,10 +445,9 @@ static struct dso *findnew_dso(int pid, int tid, const char *filename,
 	}
 
 	if (dso) {
-		mutex_lock(&dso->lock);
-		nsinfo__put(dso->nsinfo);
-		dso->nsinfo = nsi;
-		mutex_unlock(&dso->lock);
+		mutex_lock(dso__lock(dso));
+		dso__set_nsinfo(dso, nsi);
+		mutex_unlock(dso__lock(dso));
 	} else
 		nsinfo__put(nsi);
 
@@ -466,8 +465,8 @@ static int perf_event__repipe_buildid_mmap(struct perf_tool *tool,
 	dso = findnew_dso(event->mmap.pid, event->mmap.tid,
 			  event->mmap.filename, NULL, machine);
 
-	if (dso && !dso->hit) {
-		dso->hit = 1;
+	if (dso && !dso__hit(dso)) {
+		dso__set_hit(dso);
 		dso__inject_build_id(dso, tool, machine, sample->cpumode, 0);
 	}
 	dso__put(dso);
@@ -492,7 +491,7 @@ static int perf_event__repipe_mmap2(struct perf_tool *tool,
 				  event->mmap2.filename, NULL, machine);
 		if (dso) {
 			/* mark it not to inject build-id */
-			dso->hit = 1;
+			dso__set_hit(dso);
 		}
 		dso__put(dso);
 	}
@@ -544,7 +543,7 @@ static int perf_event__repipe_buildid_mmap2(struct perf_tool *tool,
 				  event->mmap2.filename, NULL, machine);
 		if (dso) {
 			/* mark it not to inject build-id */
-			dso->hit = 1;
+			dso__set_hit(dso);
 		}
 		dso__put(dso);
 		perf_event__repipe(tool, event, sample, machine);
@@ -554,8 +553,8 @@ static int perf_event__repipe_buildid_mmap2(struct perf_tool *tool,
 	dso = findnew_dso(event->mmap2.pid, event->mmap2.tid,
 			  event->mmap2.filename, &dso_id, machine);
 
-	if (dso && !dso->hit) {
-		dso->hit = 1;
+	if (dso && !dso__hit(dso)) {
+		dso__set_hit(dso);
 		dso__inject_build_id(dso, tool, machine, sample->cpumode,
 				     event->mmap2.flags);
 	}
@@ -631,24 +630,24 @@ static int dso__read_build_id(struct dso *dso)
 {
 	struct nscookie nsc;
 
-	if (dso->has_build_id)
+	if (dso__has_build_id(dso))
 		return 0;
 
-	mutex_lock(&dso->lock);
-	nsinfo__mountns_enter(dso->nsinfo, &nsc);
-	if (filename__read_build_id(dso->long_name, &dso->bid) > 0)
-		dso->has_build_id = true;
-	else if (dso->nsinfo) {
-		char *new_name = dso__filename_with_chroot(dso, dso->long_name);
+	mutex_lock(dso__lock(dso));
+	nsinfo__mountns_enter(dso__nsinfo(dso), &nsc);
+	if (filename__read_build_id(dso__long_name(dso), dso__bid(dso)) > 0)
+		dso__set_has_build_id(dso);
+	else if (dso__nsinfo(dso)) {
+		char *new_name = dso__filename_with_chroot(dso, dso__long_name(dso));
 
-		if (new_name && filename__read_build_id(new_name, &dso->bid) > 0)
-			dso->has_build_id = true;
+		if (new_name && filename__read_build_id(new_name, dso__bid(dso)) > 0)
+			dso__set_has_build_id(dso);
 		free(new_name);
 	}
 	nsinfo__mountns_exit(&nsc);
-	mutex_unlock(&dso->lock);
+	mutex_unlock(dso__lock(dso));
 
-	return dso->has_build_id ? 0 : -1;
+	return dso__has_build_id(dso) ? 0 : -1;
 }
 
 static struct strlist *perf_inject__parse_known_build_ids(
@@ -700,14 +699,14 @@ static bool perf_inject__lookup_known_build_id(struct perf_inject *inject,
 		dso_name = strchr(build_id, ' ');
 		bid_len = dso_name - pos->s;
 		dso_name = skip_spaces(dso_name);
-		if (strcmp(dso->long_name, dso_name))
+		if (strcmp(dso__long_name(dso), dso_name))
 			continue;
 		for (int ix = 0; 2 * ix + 1 < bid_len; ++ix) {
-			dso->bid.data[ix] = (hex(build_id[2 * ix]) << 4 |
-					     hex(build_id[2 * ix + 1]));
+			dso__bid(dso)->data[ix] = (hex(build_id[2 * ix]) << 4 |
+						  hex(build_id[2 * ix + 1]));
 		}
-		dso->bid.size = bid_len / 2;
-		dso->has_build_id = 1;
+		dso__bid(dso)->size = bid_len / 2;
+		dso__set_has_build_id(dso);
 		return true;
 	}
 	return false;
@@ -720,9 +719,9 @@ static int dso__inject_build_id(struct dso *dso, struct perf_tool *tool,
 						  tool);
 	int err;
 
-	if (is_anon_memory(dso->long_name) || flags & MAP_HUGETLB)
+	if (is_anon_memory(dso__long_name(dso)) || flags & MAP_HUGETLB)
 		return 0;
-	if (is_no_dso_memory(dso->long_name))
+	if (is_no_dso_memory(dso__long_name(dso)))
 		return 0;
 
 	if (inject->known_build_ids != NULL &&
@@ -730,14 +729,14 @@ static int dso__inject_build_id(struct dso *dso, struct perf_tool *tool,
 		return 1;
 
 	if (dso__read_build_id(dso) < 0) {
-		pr_debug("no build_id found for %s\n", dso->long_name);
+		pr_debug("no build_id found for %s\n", dso__long_name(dso));
 		return -1;
 	}
 
 	err = perf_event__synthesize_build_id(tool, dso, cpumode,
 					      perf_event__repipe, machine);
 	if (err) {
-		pr_err("Can't synthesize build_id event for %s\n", dso->long_name);
+		pr_err("Can't synthesize build_id event for %s\n", dso__long_name(dso));
 		return -1;
 	}
 
@@ -763,8 +762,8 @@ int perf_event__inject_buildid(struct perf_tool *tool, union perf_event *event,
 	if (thread__find_map(thread, sample->cpumode, sample->ip, &al)) {
 		struct dso *dso = map__dso(al.map);
 
-		if (!dso->hit) {
-			dso->hit = 1;
+		if (!dso__hit(dso)) {
+			dso__set_hit(dso);
 			dso__inject_build_id(dso, tool, machine,
 					     sample->cpumode, map__flags(al.map));
 		}
@@ -1146,8 +1145,8 @@ static bool dso__is_in_kernel_space(struct dso *dso)
 		return false;
 
 	return dso__is_kcore(dso) ||
-	       dso->kernel ||
-	       is_kernel_module(dso->long_name, PERF_RECORD_MISC_CPUMODE_UNKNOWN);
+	       dso__kernel(dso) ||
+	       is_kernel_module(dso__long_name(dso), PERF_RECORD_MISC_CPUMODE_UNKNOWN);
 }
 
 static u64 evlist__first_id(struct evlist *evlist)
@@ -1181,7 +1180,7 @@ static int synthesize_build_id(struct perf_inject *inject, struct dso *dso, pid_
 	if (!machine)
 		return -ENOMEM;
 
-	dso->hit = 1;
+	dso__set_hit(dso);
 
 	return perf_event__synthesize_build_id(&inject->tool, dso, cpumode,
 					       process_build_id, machine);
@@ -1192,7 +1191,7 @@ static int guest_session__add_build_ids_cb(struct dso *dso, void *data)
 	struct guest_session *gs = data;
 	struct perf_inject *inject = container_of(gs, struct perf_inject, guest_session);
 
-	if (!dso->has_build_id)
+	if (!dso__has_build_id(dso))
 		return 0;
 
 	return synthesize_build_id(inject, dso, gs->machine_pid);