Ticket #581: configure_jit_selinux.patch

config/auto/jit/test_exec_linux_c.in

@@ -7 +7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <sys/mman.h>
 #include <limits.h>
 #include <errno.h>
@@ -36 +37 @@
     pf t;
     char *p;
     int rc;
-    int prot = PROT_READ;
+    int prot = PROT_READ | PROT_WRITE;
 
     if (argc != 2) {
         fprintf(stderr, "usage: test 0 | 1\n");
@@ -45 +46 @@
     if (atoi(argv[1]))
         prot |= PROT_EXEC;
 
-    p = memalign(PAGE_SIZE, sizeof (code));
+    p = mmap(NULL, PAGE_SIZE, prot, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
+    if (!p) {
+        perror("mmap failed\n");
+        exit(1);
+    }
+
     memcpy(p, code, sizeof (code));
     t  = (pf) p;
-    rc = mprotect(p, PAGE_SIZE, prot);
-    if (rc) {
-        fprintf(stderr, "p = %p  PAGE_SIZE = %d (0x%x)\n", p,
-            PAGE_SIZE, PAGE_SIZE);
-        perror("failure");
-    }
 
     if (t() == 1)
         puts("ok");