tests/restrict_jit.c

   1 #include <stdlib.h>
   2 #include <unistd.h>
   3 #include <sys/sysctl.h>
   4 #include <sys/mman.h>
   5
   6 #include <darwintest.h>
   7
   8
   9 /*
  10  * macOS only test. Try to map 2 different MAP_JIT regions. 2nd should fail.
  11  */
  12 T_DECL(restrict_jit, "macOS restricted JIT entitlement test")
  13 {
  14 #if TARGET_OS_OSX
  15         void *addr1;
  16         void *addr2;
  17         size_t size = 64 * 1024;
  18
  19
  20         addr1 = mmap(NULL, size, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANON | MAP_PRIVATE | MAP_JIT, -1, 0);
  21         T_ASSERT_NE_PTR(addr1, MAP_FAILED, "First map MAP_JIT");
  22
  23         addr2 = mmap(NULL, size, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANON | MAP_PRIVATE | MAP_JIT, -1, 0);
  24         if (addr2 == MAP_FAILED) {
  25                 T_PASS("Only one MAP_JIT was allowed");
  26         } else {
  27                 T_FAIL("Second MAP_JIT was allowed");
  28         }
  29
  30 #else
  31         T_SKIP("Not macOS");
  32 #endif
  33 }