More mac fixups.

src/poly/debugging_mac.cc

@@ -0,0 +1,29 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2014 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#include <poly/debugging.h>
+
+#include <sys/sysctl.h>
+#include <unistd.h>
+
+namespace poly {
+namespace debugging {
+
+bool IsDebuggerAttached() {
+  // https://developer.apple.com/library/mac/qa/qa1361/_index.html
+  kinfo_proc info;
+  info.kp_proc.p_flag = 0;
+  int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_PID, getpid()};
+  size_t size = sizeof(info);
+  sysctl(mib, sizeof(mib) / sizeof(*mib), &info, &size, nullptr, 0);
+  return (info.kp_proc.p_flag & P_TRACED) != 0;
+}
+
+}  // namespace debugging
+}  // namespace poly