opcache, distinguishing segments on stats tools for Mac.

Author: devnexen

ext/opcache/shared_alloc_mmap.c

@@ -29,6 +29,10 @@
 #include <stdlib.h>
 #include <sys/mman.h>
 
+#ifdef __APPLE__
+#include <mach/vm_statistics.h>
+#endif
+
 #if defined(MAP_ANON) && !defined(MAP_ANONYMOUS)
 # define MAP_ANONYMOUS MAP_ANON
 #endif
@@ -87,6 +91,12 @@ static int create_segments(size_t requested_size, zend_shared_segment ***shared_
 	if (p != MAP_FAILED) {
 		goto success;
 	}
+#elif defined(VM_MAKE_TAG)
+	/* allows tracking segments via tools such as vmmap */
+	p = mmap(NULL, requested_size, flags, MAP_SHARED|MAP_ANONYMOUS, VM_MAKE_TAG(251), 0);
+	if (p != MAP_FAILED) {
+		goto success;
+	}
 #endif
 
 	p = mmap(0, requested_size, flags, MAP_SHARED|MAP_ANONYMOUS, -1, 0);