Tests: Add test for byte/short atomics on addresses which are not word-aligned

[userspace-rcu.git] / tests / unit / test_uatomic.c

diff --git a/tests/unit/test_uatomic.c b/tests/unit/test_uatomic.c
index 12e0266023301c8f7e8d9239b757bc37082c01c8..d9c70e0ac912747d5a68fcf7ee90872b0e25a3e8 100644 (file)
--- a/tests/unit/test_uatomic.c
+++ b/tests/unit/test_uatomic.c
@@ -9,14 +9,18 @@
 
 #define NR_TESTS 17
 
+#define BYTE_PER_LONG  (sizeof(unsigned long) / sizeof(unsigned char))
+#define SHORT_PER_LONG (sizeof(unsigned long) / sizeof(unsigned short))
+#define INT_PER_LONG   (sizeof(unsigned long) / sizeof(unsigned int))
+
 struct testvals {
 #ifdef UATOMIC_HAS_ATOMIC_BYTE
-       unsigned char c;
+       unsigned char c[BYTE_PER_LONG];
 #endif
 #ifdef UATOMIC_HAS_ATOMIC_SHORT
-       unsigned short s;
+       unsigned short s[SHORT_PER_LONG];
 #endif
-       unsigned int i;
+       unsigned int i[INT_PER_LONG];
        unsigned long l;
 };
 
@@ -75,25 +79,36 @@ do {                                                \
 
 int main(void)
 {
-       int nr_run = 2;
+       int nr_run = INT_PER_LONG + 1;
+       unsigned long i;
+
 #ifdef UATOMIC_HAS_ATOMIC_BYTE
-       nr_run += 1;
+       nr_run += BYTE_PER_LONG;
 #endif
 #ifdef UATOMIC_HAS_ATOMIC_SHORT
-       nr_run += 1;
+       nr_run += SHORT_PER_LONG;
 #endif
 
        plan_tests(nr_run * NR_TESTS);
 #ifdef UATOMIC_HAS_ATOMIC_BYTE
-       diag("Test atomic ops on byte");
-       do_test(&vals.c);
+       for (i = 0; i < BYTE_PER_LONG; i++) {
+               diag("Test atomic ops on byte with %lu byte offset from long alignment",
+                       i);
+               do_test(&vals.c[i]);
+       }
 #endif
 #ifdef UATOMIC_HAS_ATOMIC_SHORT
-       diag("Test atomic ops on short");
-       do_test(&vals.s);
+       for (i = 0; i < SHORT_PER_LONG; i++) {
+               diag("Test atomic ops on short with %lu byte offset from long alignment",
+                       i * sizeof(unsigned short));
+               do_test(&vals.s[i]);
+       }
 #endif
-       diag("Test atomic ops on int");
-       do_test(&vals.i);
+       for (i = 0; i < INT_PER_LONG; i++) {
+               diag("Test atomic ops on int with %lu byte offset from long alignment",
+                       i * sizeof(unsigned int));
+               do_test(&vals.i[i]);
+       }
        diag("Test atomic ops on long");
        do_test(&vals.l);