perf thread: Add accessor functions for thread

Using accessors will make it easier to add reference count checking in
later patches.

Committer notes:

thread->nsinfo wasn't wrapped as it is used together with
nsinfo__zput(), where does a trick to set the field with a refcount
being dropped to NULL, and that doesn't work well with using
thread__nsinfo(thread), that loses the &thread->nsinfo pointer.

When refcount checking is added to 'struct thread', later in this
series, nsinfo__zput(RC_CHK_ACCESS(thread)->nsinfo) will be used to
check the thread pointer.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ali Saidi <alisaidi@amazon.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Brian Robbins <brianrob@linux.microsoft.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: Dmitrii Dolgov <9erthalion6@gmail.com>
Cc: Fangrui Song <maskray@google.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ivan Babrou <ivan@cloudflare.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jing Zhang <renyu.zj@linux.alibaba.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Steinar H. Gunderson <sesse@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Wenyu Liu <liuwenyu7@huawei.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Ye Xingchen <ye.xingchen@zte.com.cn>
Cc: Yuan Can <yuancan@huawei.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230608232823.4027869-4-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 11 insertions, 10 deletions

diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index 69c81759a64f..c7ad9e003080 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -2533,13 +2533,15 @@ do_zoom_thread(struct hist_browser *browser, struct popup_action *act)
 		thread__zput(browser->hists->thread_filter);
 		ui_helpline__pop();
 	} else {
+		const char *comm_set_str =
+			thread__comm_set(thread) ? thread__comm_str(thread) : "";
+
 		if (hists__has(browser->hists, thread)) {
 			ui_helpline__fpush("To zoom out press ESC or ENTER + \"Zoom out of %s(%d) thread\"",
-					   thread->comm_set ? thread__comm_str(thread) : "",
-					   thread->tid);
+					   comm_set_str, thread__tid(thread));
 		} else {
 			ui_helpline__fpush("To zoom out press ESC or ENTER + \"Zoom out of %s thread\"",
-					   thread->comm_set ? thread__comm_str(thread) : "");
+					   comm_set_str);
 		}
 
 		browser->hists->thread_filter = thread__get(thread);
@@ -2557,20 +2559,19 @@ add_thread_opt(struct hist_browser *browser, struct popup_action *act,
 	       char **optstr, struct thread *thread)
 {
 	int ret;
+	const char *comm_set_str, *in_out;
 
 	if ((!hists__has(browser->hists, thread) &&
 	     !hists__has(browser->hists, comm)) || thread == NULL)
 		return 0;
 
+	in_out = browser->hists->thread_filter ? "out of" : "into";
+	comm_set_str = thread__comm_set(thread) ? thread__comm_str(thread) : "";
 	if (hists__has(browser->hists, thread)) {
 		ret = asprintf(optstr, "Zoom %s %s(%d) thread",
-			       browser->hists->thread_filter ? "out of" : "into",
-			       thread->comm_set ? thread__comm_str(thread) : "",
-			       thread->tid);
+			       in_out, comm_set_str, thread__tid(thread));
 	} else {
-		ret = asprintf(optstr, "Zoom %s %s thread",
-			       browser->hists->thread_filter ? "out of" : "into",
-			       thread->comm_set ? thread__comm_str(thread) : "");
+		ret = asprintf(optstr, "Zoom %s %s thread", in_out, comm_set_str);
 	}
 	if (ret < 0)
 		return 0;
diff --git a/tools/perf/ui/stdio/hist.c b/tools/perf/ui/stdio/hist.c
index f36270485168..b849caace398 100644
--- a/tools/perf/ui/stdio/hist.c
+++ b/tools/perf/ui/stdio/hist.c
@@ -885,7 +885,7 @@ size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows,
 		}
 
 		if (h->ms.map == NULL && verbose > 1) {
-			maps__fprintf(h->thread->maps, fp);
+			maps__fprintf(thread__maps(h->thread), fp);
 			fprintf(fp, "%.10s end\n", graph_dotted_line);
 		}
 	}