perf test: Add extra diagnostics to maps test

Dump the resultant and comparison maps on failure.
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Darren Hart <dvhart@infradead.org>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Hao Luo <haoluo@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Miaoqian Lin <linmq006@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Riccardo Mancini <rickyman7@gmail.com>
Cc: Shunsuke Nakamura <nakamura.shun@fujitsu.com>
Cc: Song Liu <song@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Stephen Brennan <stephen.s.brennan@oracle.com>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Yury Norov <yury.norov@gmail.com>
Link: https://lore.kernel.org/r/20230404205954.2245628-2-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/tests/maps.c

 // SPDX-License-Identifier: GPL-2.0
+#include <inttypes.h>
 #include <linux/compiler.h>
 #include <linux/kernel.h>
 #include "tests.h"
@@ -17,22 +18,42 @@ static int check_maps(struct map_def *merged, unsigned int size, struct maps *ma
 {
 	struct map_rb_node *rb_node;
 	unsigned int i = 0;
+	bool failed = false;
 
+	if (maps__nr_maps(maps) != size) {
+		pr_debug("Expected %d maps, got %d", size, maps__nr_maps(maps));
+		failed = true;
+	} else {
 		maps__for_each_entry(maps, rb_node) {
 			struct map *map = rb_node->map;
 
-		if (i > 0)
-			TEST_ASSERT_VAL("less maps expected", (map && i < size) || (!map && i == size));
-
-		TEST_ASSERT_VAL("wrong map start",  map__start(map) == merged[i].start);
-		TEST_ASSERT_VAL("wrong map end",    map__end(map) == merged[i].end);
-		TEST_ASSERT_VAL("wrong map name",  !strcmp(map__dso(map)->name, merged[i].name));
-		TEST_ASSERT_VAL("wrong map refcnt", refcount_read(&map->refcnt) == 1);
-
+			if (map__start(map) != merged[i].start ||
+			    map__end(map) != merged[i].end ||
+			    strcmp(map__dso(map)->name, merged[i].name) ||
+			    refcount_read(&map->refcnt) != 1) {
+				failed = true;
+			}
 			i++;
 		}
+	}
+	if (failed) {
+		pr_debug("Expected:\n");
+		for (i = 0; i < size; i++) {
+			pr_debug("\tstart: %" PRIu64 " end: %" PRIu64 " name: '%s' refcnt: 1\n",
+				merged[i].start, merged[i].end, merged[i].name);
+		}
+		pr_debug("Got:\n");
+		maps__for_each_entry(maps, rb_node) {
+			struct map *map = rb_node->map;
 
-	return TEST_OK;
+			pr_debug("\tstart: %" PRIu64 " end: %" PRIu64 " name: '%s' refcnt: %d\n",
+				map__start(map),
+				map__end(map),
+				map__dso(map)->name,
+				refcount_read(&map->refcnt));
+		}
+	}
+	return failed ? TEST_FAIL : TEST_OK;
 }
 
 static int test__maps__merge_in(struct test_suite *t __maybe_unused, int subtest __maybe_unused)