[Pixman] [PATCH] Add alpha-loop test program
Søren Sandmann
sandmann at daimi.au.dk
Tue Dec 14 11:44:08 PST 2010
From: Søren Sandmann Pedersen <ssp at redhat.com>
This tests what happens if you attempt to make an image with an alpha
map that has the image as its alpha map. This results in an infinite
loop in _pixman_image_validate(), so the test sets up a SIGALRM to
exit if it runs for more than five seconds.
---
configure.ac | 12 +++++++++++-
test/Makefile.am | 4 ++++
test/alpha-loop.c | 29 +++++++++++++++++++++++++++++
test/utils.c | 33 +++++++++++++++++++++++++++++++++
test/utils.h | 3 +++
5 files changed, 80 insertions(+), 1 deletions(-)
create mode 100644 test/alpha-loop.c
diff --git a/configure.ac b/configure.ac
index 98c2783..acec8a1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -600,13 +600,23 @@ AC_SUBST(DEP_CFLAGS)
AC_SUBST(DEP_LIBS)
dnl =====================================
-dnl posix_memalign
+dnl posix_memalign, sigaction, alarm
AC_CHECK_FUNC(posix_memalign, have_posix_memalign=yes, have_posix_memalign=no)
if test x$have_posix_memalign = xyes; then
AC_DEFINE(HAVE_POSIX_MEMALIGN, 1, [Whether we have posix_memalign()])
fi
+AC_CHECK_FUNC(sigaction, have_sigaction=yes, have_sigaction=no)
+if test x$have_sigaction = xyes; then
+ AC_DEFINE(HAVE_SIGACTION, 1, [Whether we have sigaction()])
+fi
+
+AC_CHECK_FUNC(alarm, have_alarm=yes, have_alarm=no)
+if test x$have_alarm = xyes; then
+ AC_DEFINE(HAVE_ALARM, 1, [Whether we have alarm()])
+fi
+
dnl =====================================
dnl Thread local storage
diff --git a/test/Makefile.am b/test/Makefile.am
index 2a7aea2..5273bec 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -13,6 +13,7 @@ TESTPROGRAMS = \
gradient-crash-test \
trap-crasher \
alphamap \
+ alpha-loop \
scaling-crash-test \
blitters-test \
scaling-test \
@@ -39,6 +40,9 @@ scaling_test_SOURCES = scaling-test.c utils.c utils.h
alphamap_LDADD = $(TEST_LDADD)
alphamap_SOURCES = alphamap.c utils.c utils.h
+alpha_loop_LDADD = $(TEST_LDADD)
+alpha_loop_SOURCES = alpha-loop.c utils.c utils.h
+
# GTK using test programs
if HAVE_GTK
diff --git a/test/alpha-loop.c b/test/alpha-loop.c
new file mode 100644
index 0000000..e4d90a9
--- /dev/null
+++ b/test/alpha-loop.c
@@ -0,0 +1,29 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "utils.h"
+
+#define WIDTH 400
+#define HEIGHT 200
+
+int
+main (int argc, char **argv)
+{
+ uint8_t *alpha = make_random_bytes (WIDTH * HEIGHT);
+ uint32_t *src = (uint32_t *)make_random_bytes (WIDTH * HEIGHT * 4);
+ uint32_t *dest = (uint32_t *)make_random_bytes (WIDTH * HEIGHT * 4);
+
+ pixman_image_t *a = pixman_image_create_bits (PIXMAN_a8, WIDTH, HEIGHT, (uint32_t *)alpha, WIDTH);
+ pixman_image_t *d = pixman_image_create_bits (PIXMAN_a8r8g8b8, WIDTH, HEIGHT, dest, WIDTH * 4);
+ pixman_image_t *s = pixman_image_create_bits (PIXMAN_a2r10g10b10, WIDTH, HEIGHT, src, WIDTH * 4);
+
+ fail_after (5, "Infinite loop detected: 5 seconds without progress\n");
+
+ pixman_image_set_alpha_map (s, a, 0, 0);
+ pixman_image_set_alpha_map (a, s, 0, 0);
+
+ pixman_image_composite (PIXMAN_OP_SRC, s, NULL, d, 0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
+
+ pixman_image_unref (s);
+
+ return 0;
+}
diff --git a/test/utils.c b/test/utils.c
index 1ee5c9c..d95cbc2 100644
--- a/test/utils.c
+++ b/test/utils.c
@@ -1,4 +1,9 @@
#include "utils.h"
+#include <signal.h>
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
/* Random number seed
*/
@@ -319,3 +324,31 @@ fuzzer_test_main (const char *test_name,
return 0;
}
+
+static const char *global_msg;
+
+static void
+on_alarm (int signo)
+{
+ printf ("%s\n", global_msg);
+ exit (1);
+}
+
+void
+fail_after (int seconds, const char *msg)
+{
+#ifdef HAVE_SIGACTION
+#ifdef HAVE_ALARM
+ struct sigaction action;
+
+ global_msg = msg;
+
+ memset (&action, 0, sizeof (action));
+ action.sa_handler = on_alarm;
+
+ alarm (seconds);
+
+ sigaction (SIGALRM, &action, NULL);
+#endif
+#endif
+}
diff --git a/test/utils.h b/test/utils.h
index 95d809a..bfb76a5 100644
--- a/test/utils.h
+++ b/test/utils.h
@@ -62,3 +62,6 @@ fuzzer_test_main (const char *test_name,
uint32_t (*test_function)(int testnum, int verbose),
int argc,
const char *argv[]);
+
+void
+fail_after (int seconds, const char *msg);
--
1.6.0.6
More information about the Pixman
mailing list