src/os/aix/vm/os_aix.cpp

rev 12283 : 8169373: Work around linux NPTL stack guard error.
Summary: Also streamline OS guard page handling on linuxs390, linuxppc, aixppc.

@@ -850,42 +850,45 @@
 bool os::create_thread(Thread* thread, ThreadType thr_type,
                        size_t req_stack_size) {
 
   assert(thread->osthread() == NULL, "caller responsible");
 
-  // Allocate the OSThread object
+  // Allocate the OSThread object.
   OSThread* osthread = new OSThread(NULL, NULL);
   if (osthread == NULL) {
     return false;
   }
 
-  // set the correct thread state
+  // Set the correct thread state.
   osthread->set_thread_type(thr_type);
 
   // Initial state is ALLOCATED but not INITIALIZED
   osthread->set_state(ALLOCATED);
 
   thread->set_osthread(osthread);
 
-  // init thread attributes
+  // Init thread attributes.
   pthread_attr_t attr;
   pthread_attr_init(&attr);
   guarantee(pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED) == 0, "???");
 
   // Make sure we run in 1:1 kernel-user-thread mode.
   if (os::Aix::on_aix()) {
     guarantee(pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM) == 0, "???");
     guarantee(pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED) == 0, "???");
-  } // end: aix
+  }
 
   // Start in suspended state, and in os::thread_start, wake the thread up.
   guarantee(pthread_attr_setsuspendstate_np(&attr, PTHREAD_CREATE_SUSPENDED_NP) == 0, "???");
 
-  // calculate stack size if it's not specified by caller
+  // Calculate stack size if it's not specified by caller.
   size_t stack_size = os::Posix::get_initial_stack_size(thr_type, req_stack_size);
   pthread_attr_setstacksize(&attr, stack_size);
 
+  // libc guard page
+  pthread_attr_setguardsize(&attr, os::Aix::default_guard_size(thr_type));
+
   pthread_t tid;
   int ret = pthread_create(&tid, &attr, (void* (*)(void*)) thread_native_entry, thread);
 
   char buf[64];
   if (ret == 0) {

@@ -897,11 +900,11 @@
   }
 
   pthread_attr_destroy(&attr);
 
   if (ret != 0) {
-    // Need to clean up stuff we've allocated so far
+    // Need to clean up stuff we've allocated so far.
     thread->set_osthread(NULL);
     delete osthread;
     return false;
   }