GN: aix port along with linux_s390x, linux_ppc64 and linux_ppc64le support.

base/debug/debugger_posix.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/debug/debugger.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <stddef.h>
 #include <stdio.h>
@@ skipping 104 matching lines @@
 #if defined(OS_FREEBSD)
   being_debugged = (info.ki_flag & P_TRACED) != 0;
 #elif defined(OS_BSD)
   being_debugged = (info.p_flag & P_TRACED) != 0;
 #else
   being_debugged = (info.kp_proc.p_flag & P_TRACED) != 0;
 #endif
   return being_debugged;
 }
 
-#elif defined(OS_LINUX) || defined(OS_ANDROID)
+#elif defined(OS_LINUX) || defined(OS_ANDROID) || defined(OS_AIX)
 
 // We can look in /proc/self/status for TracerPid.  We are likely used in crash
 // handling, so we are careful not to use the heap or have side effects.
 // Another option that is common is to try to ptrace yourself, but then we
 // can't detach without forking(), and that's not so great.
 // static
 bool BeingDebugged() {
   // NOTE: This code MUST be async-signal safe (it's used by in-process
   // stack dumping signal handler). NO malloc or stdio is allowed here.
 
@@ skipping 120 matching lines @@
   // attach the debugger, inspect the state of the program and then resume it by
   // setting the 'go' variable above.
 #elif defined(NDEBUG)
   // Terminate the program after signaling the debug break.
   _exit(1);
 #endif
 }
 
 }  // namespace debug
 }  // namespace base