diff options
Diffstat (limited to 'ext/pcre/pcre2lib/sljit/sljitExecAllocator.c')
| -rw-r--r-- | ext/pcre/pcre2lib/sljit/sljitExecAllocator.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/ext/pcre/pcre2lib/sljit/sljitExecAllocator.c b/ext/pcre/pcre2lib/sljit/sljitExecAllocator.c index 3b37a9751f..caaf438578 100644 --- a/ext/pcre/pcre2lib/sljit/sljitExecAllocator.c +++ b/ext/pcre/pcre2lib/sljit/sljitExecAllocator.c @@ -121,7 +121,20 @@ static SLJIT_INLINE int get_map_jit_flag() uname(&name); /* Kernel version for 10.14.0 (Mojave) */ - map_jit_flag = (atoi(name.release) >= 18) ? MAP_JIT : 0; + if (atoi(name.release) >= 18) { + /* Only use MAP_JIT if a hardened runtime is used, because MAP_JIT is incompatible + with fork(). */ + void *ptr = mmap( + NULL, getpagesize(), PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); + if (ptr == MAP_FAILED) { + map_jit_flag = MAP_JIT; + } else { + map_jit_flag = 0; + munmap(ptr, getpagesize()); + } + } else { + map_jit_flag = 0; + } } return map_jit_flag; |