[Pixman] [PATCH] test: Fix fence-image-self-test on Mac

[Andrea Canciani]

On MacOS X an out-of-bounds access to an mmap-ed region typically
results in a SIGBUS, but fence-image-self-test was only accepting a
SIGSEGV as notification of invalid access.

Fixes fence-image-self-test
---
 test/fence-image-self-test.c | 12 +++++++-----
 test/utils.c                 |  6 +++---
 2 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/test/fence-image-self-test.c b/test/fence-image-self-test.c
index c883038..484c4ac 100644
--- a/test/fence-image-self-test.c
+++ b/test/fence-image-self-test.c
@@ -73,7 +73,7 @@ prinfo (const char *fmt, ...)
 }
 
 static void
-do_expect_segv (void (*fn)(void *), void *data)
+do_expect_signal (void (*fn)(void *), void *data)
 {
     struct sigaction sa;
 
@@ -82,6 +82,8 @@ do_expect_segv (void (*fn)(void *), void *data)
     sa.sa_sigaction = segv_handler;
     if (sigaction (SIGSEGV, &sa, NULL) == -1)
         die ("sigaction failed", errno);
+    if (sigaction (SIGBUS, &sa, NULL) == -1)
+        die ("sigaction failed", errno);
 
     (*fn)(data);
 
@@ -96,7 +98,7 @@ do_expect_segv (void (*fn)(void *), void *data)
  * to exit with success, and return failure otherwise.
  */
 static pixman_bool_t
-expect_segv (void (*fn)(void *), void *data)
+expect_signal (void (*fn)(void *), void *data)
 {
     pid_t pid, wp;
     int status;
@@ -106,7 +108,7 @@ expect_segv (void (*fn)(void *), void *data)
         die ("fork failed", errno);
 
     if (pid == 0)
-        do_expect_segv (fn, data); /* never returns */
+        do_expect_signal (fn, data); /* never returns */
 
     wp = waitpid (pid, &status, 0);
     if (wp != pid)
@@ -131,9 +133,9 @@ test_read_fault (uint8_t *p, int offset)
 {
     prinfo ("*(uint8_t *)(%p + %d)", p, offset);
 
-    if (expect_segv (read_u8, p + offset))
+    if (expect_signal (read_u8, p + offset))
     {
-        prinfo ("\tSEGV OK\n");
+        prinfo ("\signal OK\n");
 
         return TRUE;
     }
diff --git a/test/utils.c b/test/utils.c
index 8657966..f8e42a5 100644
--- a/test/utils.c
+++ b/test/utils.c
@@ -471,9 +471,9 @@ fence_image_destroy (pixman_image_t *image, void *data)
  * min_width is only a minimum width for the image. The width is aligned up
  * for the row size to be divisible by both page size and pixel size.
  *
- * If stride_fence is true, the additional page on each row will be armed
- * to cause SIGSEVG on all accesses. This should catch all accesses outside
- * the valid row pixels.
+ * If stride_fence is true, the additional page on each row will be
+ * armed to cause SIGSEGV or SIGBUS on all accesses. This should catch
+ * all accesses outside the valid row pixels.
  */
 pixman_image_t *
 fence_image_create_bits (pixman_format_code_t format,
-- 
2.3.8 (Apple Git-58)