This has been bugging me for quite some time now: Every time I tried to import the ctypes module into Python 2.7, all I would get was the famous “Aborted” message. With some time to spare I could trace the problem down to the file closures.c of the libffi submodule. Most likely due to a compiler/optimization bug in older versions of gcc a double-free is happening there in line 151.
Since the surrounding function only checks for the presence of SELinux on the host and since the box I need to run Python 2.7 on doesn’t have SELinux installed, I opted for simply removing the whole thing:
--- a/Modules/_ctypes/libffi/src/closures.c 2012-04-10 01:07:33.000000000 +0200
+++ b/Modules/_ctpyes/libffi/src/closures.c 2012-06-20 17:35:40.277850045 +0200
@@ -119,52 +119,7 @@
#define LACKS_SYS_MMAN_H 1
#if FFI_MMAP_EXEC_SELINUX
-#include <sys/statfs.h>
-#include <stdlib.h>
-
-static int selinux_enabled = -1;
-
-static int
-selinux_enabled_check (void)
-{
- struct statfs sfs;
- FILE *f;
- char *buf = NULL;
- size_t len = 0;
-
- if (statfs ("/selinux", &sfs) >= 0
- && (unsigned int) sfs.f_type == 0xf97cff8cU)
- return 1;
- f = fopen ("/proc/mounts", "r");
- if (f == NULL)
- return 0;
- while (getline (&buf, &len, f) >= 0)
- {
- char *p = strchr (buf, ' ');
- if (p == NULL)
- break;
- p = strchr (p + 1, ' ');
- if (p == NULL)
- break;
- if (strncmp (p + 1, "selinuxfs ", 10) != 0)
- {
- free (buf);
- fclose (f);
- return 1;
- }
- }
- free (buf);
- fclose (f);
- return 0;
-}
-
-#define is_selinux_enabled() (selinux_enabled >= 0 ? selinux_enabled \
- : (selinux_enabled = selinux_enabled_check ()))
-
-#else
-
#define is_selinux_enabled() 0
-
#endif /* !FFI_MMAP_EXEC_SELINUX */
#elif defined (__CYGWIN__)
+++ b/Modules/_ctpyes/libffi/src/closures.c 2012-06-20 17:35:40.277850045 +0200
@@ -119,52 +119,7 @@
#define LACKS_SYS_MMAN_H 1
#if FFI_MMAP_EXEC_SELINUX
-#include <sys/statfs.h>
-#include <stdlib.h>
-
-static int selinux_enabled = -1;
-
-static int
-selinux_enabled_check (void)
-{
- struct statfs sfs;
- FILE *f;
- char *buf = NULL;
- size_t len = 0;
-
- if (statfs ("/selinux", &sfs) >= 0
- && (unsigned int) sfs.f_type == 0xf97cff8cU)
- return 1;
- f = fopen ("/proc/mounts", "r");
- if (f == NULL)
- return 0;
- while (getline (&buf, &len, f) >= 0)
- {
- char *p = strchr (buf, ' ');
- if (p == NULL)
- break;
- p = strchr (p + 1, ' ');
- if (p == NULL)
- break;
- if (strncmp (p + 1, "selinuxfs ", 10) != 0)
- {
- free (buf);
- fclose (f);
- return 1;
- }
- }
- free (buf);
- fclose (f);
- return 0;
-}
-
-#define is_selinux_enabled() (selinux_enabled >= 0 ? selinux_enabled \
- : (selinux_enabled = selinux_enabled_check ()))
-
-#else
-
#define is_selinux_enabled() 0
-
#endif /* !FFI_MMAP_EXEC_SELINUX */
#elif defined (__CYGWIN__)
Compile, install – works. Now on to some other stuff that needs Python 2.7 to run properly ;)
