Ensure remapped memory has desired protection on Darwin

base/runtime/virtual_memory_darwin.odin

@@ -11,6 +11,7 @@ foreign lib {
 	mach_task_self_: u32
 	mach_vm_allocate :: proc(target: u32, address: ^u64, size: u64, flags: i32) -> i32 ---
 	mach_vm_deallocate :: proc(target: u32, address: u64, size: u64) -> i32 ---
+	mach_vm_protect :: proc(target_task: u32, address: u64, size: u64, set_maximum: b32, new_protection: i32) -> i32 ---
 	mach_vm_map :: proc(
 		target_task:    u32,
 		address:        ^u64,
@@ -127,6 +128,8 @@ _resize_virtual_memory :: proc "contextless" (ptr: rawptr, old_size: int, new_si
 		if result_remap != 0 {
 			return nil
 		}
+		mach_vm_protect(mach_task_self_, new_address, u64(new_size), true, VM_PROT_READ|VM_PROT_WRITE)
+		mach_vm_protect(mach_task_self_, new_address, u64(new_size), false, VM_PROT_READ|VM_PROT_WRITE)
 		mach_vm_deallocate(mach_task_self_, u64(uintptr(ptr)), u64(old_size))
 		return rawptr(uintptr(new_address))
 	} else {