706 
 707   // Allocate the OSThread object
 708   OSThread* osthread = new OSThread(NULL, NULL);
 709   if (osthread == NULL) {
 710     return false;
 711   }
 712 
 713   // set the correct thread state
 714   osthread->set_thread_type(thr_type);
 715 
 716   // Initial state is ALLOCATED but not INITIALIZED
 717   osthread->set_state(ALLOCATED);
 718 
 719   thread->set_osthread(osthread);
 720 
 721   // init thread attributes
 722   pthread_attr_t attr;
 723   pthread_attr_init(&attr);
 724   pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 725 
 726   // calculate stack size if it's not specified by caller
 727   size_t stack_size = os::Posix::get_initial_stack_size(thr_type, req_stack_size);







 728   pthread_attr_setstacksize(&attr, stack_size);
 729 
 730   // glibc guard page
 731   pthread_attr_setguardsize(&attr, os::Linux::default_guard_size(thr_type));
 732 
 733   ThreadState state;
 734 
 735   {
 736     pthread_t tid;
 737     int ret = pthread_create(&tid, &attr, (void* (*)(void*)) thread_native_entry, thread);
 738 
 739     char buf[64];
 740     if (ret == 0) {
 741       log_info(os, thread)("Thread started (pthread id: " UINTX_FORMAT ", attributes: %s). ",
 742         (uintx) tid, os::Posix::describe_pthread_attr(buf, sizeof(buf), &attr));
 743     } else {
 744       log_warning(os, thread)("Failed to start thread - pthread_create failed (%s) for attributes: %s.",
 745         os::errno_name(ret), os::Posix::describe_pthread_attr(buf, sizeof(buf), &attr));
 746     }
 747 

 706 
 707   // Allocate the OSThread object
 708   OSThread* osthread = new OSThread(NULL, NULL);
 709   if (osthread == NULL) {
 710     return false;
 711   }
 712 
 713   // set the correct thread state
 714   osthread->set_thread_type(thr_type);
 715 
 716   // Initial state is ALLOCATED but not INITIALIZED
 717   osthread->set_state(ALLOCATED);
 718 
 719   thread->set_osthread(osthread);
 720 
 721   // init thread attributes
 722   pthread_attr_t attr;
 723   pthread_attr_init(&attr);
 724   pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 725 
 726   // Calculate stack size if it's not specified by caller.
 727   size_t stack_size = os::Posix::get_initial_stack_size(thr_type, req_stack_size);
 728   // In the Linux NPTL pthread implementation the guard size mechanism
 729   // is not implemented properly. The posix standard requires to add
 730   // the size of the guard pages to the stack size, instead Linux
 731   // takes the space out of 'stacksize'. Thus we adapt the requested
 732   // stack_size by the size of the guard pages to mimick proper
 733   // behaviour.
 734   stack_size = align_size_up(stack_size + os::Linux::default_guard_size(thr_type), vm_page_size());
 735   pthread_attr_setstacksize(&attr, stack_size);
 736 
 737   // glibc guard page
 738   pthread_attr_setguardsize(&attr, os::Linux::default_guard_size(thr_type));
 739 
 740   ThreadState state;
 741 
 742   {
 743     pthread_t tid;
 744     int ret = pthread_create(&tid, &attr, (void* (*)(void*)) thread_native_entry, thread);
 745 
 746     char buf[64];
 747     if (ret == 0) {
 748       log_info(os, thread)("Thread started (pthread id: " UINTX_FORMAT ", attributes: %s). ",
 749         (uintx) tid, os::Posix::describe_pthread_attr(buf, sizeof(buf), &attr));
 750     } else {
 751       log_warning(os, thread)("Failed to start thread - pthread_create failed (%s) for attributes: %s.",
 752         os::errno_name(ret), os::Posix::describe_pthread_attr(buf, sizeof(buf), &attr));
 753     }
 754