src/os_cpu/linux_zero/vm/os_linux_zero.cpp

rev 12363 : 8169373: Work around linux NPTL stack guard error.
Summary: Also skip libc guard page for compiler thread, merge similar code on linux platforms, and streamline libc guard page handling on linuxs390, linuxppc, aixppc.
Reviewed-by: dholmes, dcubed, kvn

*** 318,350 ****
    size_t s = (thr_type == os::compiler_thread ? 2 * M : 512 * K);
  #endif // _LP64
    return s;
  }
  
- size_t os::Linux::default_guard_size(os::ThreadType thr_type) {
-   // Only enable glibc guard pages for non-Java threads
-   // (Java threads have HotSpot guard pages)
-   return (thr_type == java_thread ? 0 : page_size());
- }
- 
  static void current_stack_region(address *bottom, size_t *size) {
    pthread_attr_t attr;
    int res = pthread_getattr_np(pthread_self(), &attr);
    if (res != 0) {
      if (res == ENOMEM) {
        vm_exit_out_of_memory(0, OOM_MMAP_ERROR, "pthread_getattr_np");
      }
      else {
!       fatal("pthread_getattr_np failed with errno = %d", res);
      }
    }
  
    address stack_bottom;
    size_t stack_bytes;
    res = pthread_attr_getstack(&attr, (void **) &stack_bottom, &stack_bytes);
    if (res != 0) {
!     fatal("pthread_attr_getstack failed with errno = %d", res);
    }
    address stack_top = stack_bottom + stack_bytes;
  
    // The block of memory returned by pthread_attr_getstack() includes
    // guard pages where present.  We need to trim these off.
--- 318,344 ----
    size_t s = (thr_type == os::compiler_thread ? 2 * M : 512 * K);
  #endif // _LP64
    return s;
  }
  
  static void current_stack_region(address *bottom, size_t *size) {
    pthread_attr_t attr;
    int res = pthread_getattr_np(pthread_self(), &attr);
    if (res != 0) {
      if (res == ENOMEM) {
        vm_exit_out_of_memory(0, OOM_MMAP_ERROR, "pthread_getattr_np");
      }
      else {
!       fatal("pthread_getattr_np failed with error = %d", res);
      }
    }
  
    address stack_bottom;
    size_t stack_bytes;
    res = pthread_attr_getstack(&attr, (void **) &stack_bottom, &stack_bytes);
    if (res != 0) {
!     fatal("pthread_attr_getstack failed with error = %d", res);
    }
    address stack_top = stack_bottom + stack_bytes;
  
    // The block of memory returned by pthread_attr_getstack() includes
    // guard pages where present.  We need to trim these off.