selftests/powerpc: Add more utility macros

Adds _MSG assertion variants to provide more context behind why a
failure occurred. Also include unistd.h for _exit() and stdio.h for
fprintf(), and move ARRAY_SIZE macro to utils.h.

The _MSG variants and ARRAY_SIZE will be used by the following
DEXCR selftests.
Signed-off-by: Benjamin Gray <bgray@linux.ibm.com>
Reviewed-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230616034846.311705-10-bgray@linux.ibm.com

tools/testing/selftests/powerpc/include/utils.h

@@ -9,11 +9,17 @@
 #define __cacheline_aligned __attribute__((aligned(128)))
 
 #include <stdint.h>
+#include <stdio.h>
 #include <stdbool.h>
 #include <linux/auxvec.h>
 #include <linux/perf_event.h>
 #include <asm/cputable.h>
 #include "reg.h"
+#include <unistd.h>
+
+#ifndef ARRAY_SIZE
+# define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+#endif
 
 /* Avoid headaches with PRI?64 - just use %ll? always */
 typedef unsigned long long u64;
@@ -67,7 +73,6 @@ struct perf_event_read {
 };
 
 #if !defined(__GLIBC_PREREQ) || !__GLIBC_PREREQ(2, 30)
-#include <unistd.h>
 #include <sys/syscall.h>
 
 static inline pid_t gettid(void)
@@ -116,6 +121,16 @@ do {								\
 	}							\
 } while (0)
 
+#define FAIL_IF_MSG(x, msg)					\
+do {								\
+	if ((x)) {						\
+		fprintf(stderr,					\
+		"[FAIL] Test FAILED on line %d: %s\n", 		\
+		__LINE__, msg);					\
+		return 1;					\
+	}							\
+} while (0)
+
 #define FAIL_IF_EXIT(x)						\
 do {								\
 	if ((x)) {						\
@@ -125,6 +140,16 @@ do {								\
 	}							\
 } while (0)
 
+#define FAIL_IF_EXIT_MSG(x, msg)				\
+do {								\
+	if ((x)) {						\
+		fprintf(stderr,					\
+		"[FAIL] Test FAILED on line %d: %s\n", 		\
+		__LINE__, msg);					\
+		_exit(1);					\
+	}							\
+} while (0)
+
 /* The test harness uses this, yes it's gross */
 #define MAGIC_SKIP_RETURN_VALUE	99
 

tools/testing/selftests/powerpc/pmu/sampling_tests/misc.h

@@ -18,8 +18,6 @@
 #define MMCR1_RSQ       0x200000000000ULL /* radix scope qual field */
 #define BHRB_DISABLE    0x2000000000ULL /* MMCRA BHRB DISABLE bit */
 
-#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
-
 extern int ev_mask_pmcxsel, ev_shift_pmcxsel;
 extern int ev_mask_marked, ev_shift_marked;
 extern int ev_mask_comb, ev_shift_comb;