[PATCH v7 3/4] libperf: tests: Add support for verbose printing

[Rob Herring <robh@kernel.org>]

Add __T_VERBOSE() so tests can add verbose output. The verbose output is
enabled with the '-v' command line option.

Signed-off-by: Rob Herring <robh@kernel.org>
---
v5:
 - Pass verbose flag to static tests
 - Fix getopt loop with unsigned char (arm64)
v3:
 - New patch
---
 tools/lib/perf/include/internal/tests.h | 32 +++++++++++++++++++++++++
 tools/lib/perf/tests/Makefile           |  6 +++--
 2 files changed, 36 insertions(+), 2 deletions(-)

diff --git a/tools/lib/perf/include/internal/tests.h b/tools/lib/perf/include/internal/tests.h
index 2093e8868a67..29425c2dabe1 100644
--- a/tools/lib/perf/include/internal/tests.h
+++ b/tools/lib/perf/include/internal/tests.h
@@ -3,11 +3,32 @@
 #define __LIBPERF_INTERNAL_TESTS_H
 
 #include <stdio.h>
+#include <unistd.h>
 
 int tests_failed;
+int tests_verbose;
+
+static inline int get_verbose(char **argv, int argc)
+{
+	int c;
+	int verbose = 0;
+
+	while ((c = getopt(argc, argv, "v")) != -1) {
+		switch (c)
+		{
+		case 'v':
+			verbose = 1;
+			break;
+		default:
+			break;
+		}
+	}
+	return verbose;
+}
 
 #define __T_START					\
 do {							\
+	tests_verbose = get_verbose(argv, argc);	\
 	fprintf(stdout, "- running %s...", __FILE__);	\
 	fflush(NULL);					\
 	tests_failed = 0;				\
@@ -30,4 +51,15 @@ do {
 	}                                                                        \
 } while (0)
 
+#define __T_VERBOSE(...)						\
+do {									\
+	if (tests_verbose) {						\
+		if (tests_verbose == 1) {				\
+			fputc('\n', stderr);				\
+			tests_verbose++;				\
+		}							\
+		fprintf(stderr, ##__VA_ARGS__);				\
+	}								\
+} while (0)
+
 #endif /* __LIBPERF_INTERNAL_TESTS_H */
diff --git a/tools/lib/perf/tests/Makefile b/tools/lib/perf/tests/Makefile
index 96841775feaf..b536cc9a26dd 100644
--- a/tools/lib/perf/tests/Makefile
+++ b/tools/lib/perf/tests/Makefile
@@ -5,6 +5,8 @@ TESTS = test-cpumap test-threadmap test-evlist test-evsel
 TESTS_SO := $(addsuffix -so,$(TESTS))
 TESTS_A  := $(addsuffix -a,$(TESTS))
 
+TEST_ARGS := $(if $(V),-v)
+
 # Set compile option CFLAGS
 ifdef EXTRA_CFLAGS
   CFLAGS := $(EXTRA_CFLAGS)
@@ -28,9 +30,9 @@ all: $(TESTS_A) $(TESTS_SO)
 
 run:
 	@echo "running static:"
-	@for i in $(TESTS_A); do ./$$i; done
+	@for i in $(TESTS_A); do ./$$i $(TEST_ARGS); done
 	@echo "running dynamic:"
-	@for i in $(TESTS_SO); do LD_LIBRARY_PATH=../ ./$$i; done
+	@for i in $(TESTS_SO); do LD_LIBRARY_PATH=../ ./$$i $(TEST_ARGS); done
 
 clean:
 	$(call QUIET_CLEAN, tests)$(RM) $(TESTS_A) $(TESTS_SO)
-- 
2.27.0