linux-kernel - [RFC PATCH 09/13] selftests/powerpc: Add more utility macros

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Date:   Mon, 28 Nov 2022 13:44:54 +1100
From:   Benjamin Gray <bgray@...ux.ibm.com>
To:     linuxppc-dev@...ts.ozlabs.org
Cc:     ajd@...ux.ibm.com, ruscur@...sell.cc, linux-kernel@...r.kernel.org,
        linux-hardening@...r.kernel.org, cmr@...escreens.de,
        Benjamin Gray <bgray@...ux.ibm.com>
Subject: [RFC PATCH 09/13] selftests/powerpc: Add more utility macros

Adds more assertion variants to provide more context behind why a
failure occurred.

The SIGSAFE_FAIL_* variants are to allow safely asserting conditions
in a signal handler (though we are about to exit, so it's unlikely to
run into an issue with regular FAIL_IF_EXIT).

Also adds an ARRAY_SIZE macro.

These will be used by the following DEXCR selftests.

Signed-off-by: Benjamin Gray <bgray@...ux.ibm.com>
---
 .../testing/selftests/powerpc/include/utils.h | 44 +++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/tools/testing/selftests/powerpc/include/utils.h b/tools/testing/selftests/powerpc/include/utils.h
index 95f3a24a4569..b03d2192c6f6 100644
--- a/tools/testing/selftests/powerpc/include/utils.h
+++ b/tools/testing/selftests/powerpc/include/utils.h
@@ -9,12 +9,19 @@
 #define __cacheline_aligned __attribute__((aligned(128)))
 
 #include <stdint.h>
+#include <stdio.h>
 #include <stdbool.h>
+#include <string.h>
+#include <unistd.h>
 #include <linux/auxvec.h>
 #include <linux/perf_event.h>
 #include <asm/cputable.h>
 #include "reg.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;
 typedef   signed long long s64;
@@ -111,6 +118,16 @@ 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)) {						\
@@ -120,6 +137,16 @@ 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
 
@@ -149,6 +176,23 @@ do {								\
 		ssize_t nbytes __attribute__((unused)); \
 		nbytes = write(STDERR_FILENO, msg, strlen(msg)); })
 
+#define SIGSAFE_FAIL_IF_EXIT(x)							\
+do {										\
+	if ((x)) {								\
+		sigsafe_err("[FAIL] Test FAILED on line " str(__LINE__) "\n");	\
+		_exit(1);							\
+	}									\
+} while (0)
+
+#define SIGSAFE_FAIL_IF_EXIT_MSG(x, msg)					\
+do {										\
+	if ((x)) {								\
+		sigsafe_err("[FAIL] Test FAILED on line " 			\
+			    str(__LINE__) ": " msg "\n");			\
+		_exit(1);							\
+	}									\
+} while (0)
+
 /* POWER9 feature */
 #ifndef PPC_FEATURE2_ARCH_3_00
 #define PPC_FEATURE2_ARCH_3_00 0x00800000
-- 
2.38.1