src/os/aix/vm/os_aix.inline.hpp

rev 7960 : 8075506: aix: improve handling of native memory

*** 1,8 ****
  /*
!  * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved.
!  * Copyright 2012, 2013 SAP AG. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
--- 1,8 ----
  /*
!  * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
!  * Copyright 2012, 2015 SAP AG. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
*** 51,72 ****
  
  inline bool os::uses_stack_guard_pages() {
    return true;
  }
  
  inline bool os::allocate_stack_guard_pages() {
    assert(uses_stack_guard_pages(), "sanity check");
!   return true;
  }
  
- 
  // On Aix, reservations are made on a page by page basis, nothing to do.
  inline void os::pd_split_reserved_memory(char *base, size_t size,
                                           size_t split, bool realloc) {
  }
  
- 
  // Bang the shadow pages if they need to be touched to be mapped.
  inline void os::bang_stack_shadow_pages() {
  }
  
  inline void os::dll_unload(void *lib) {
--- 51,73 ----
  
  inline bool os::uses_stack_guard_pages() {
    return true;
  }
  
+ // Whether or not calling code should/can commit/uncommit stack pages
+ // before guarding them. Answer for AIX is definitly no, because we
+ // operate on C heap.
  inline bool os::allocate_stack_guard_pages() {
    assert(uses_stack_guard_pages(), "sanity check");
!   return false;
  }
  
  // On Aix, reservations are made on a page by page basis, nothing to do.
  inline void os::pd_split_reserved_memory(char *base, size_t size,
                                           size_t split, bool realloc) {
  }
  
  // Bang the shadow pages if they need to be touched to be mapped.
  inline void os::bang_stack_shadow_pages() {
  }
  
  inline void os::dll_unload(void *lib) {
*** 172,186 ****
  
  inline int os::send(int fd, char* buf, size_t nBytes, uint flags) {
    RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags));
  }
  
! inline int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
    return os::send(fd, buf, nBytes, flags);
  }
  
! inline int os::connect(int fd, struct sockaddr* him, socklen_t len) {
    RESTARTABLE_RETURN_INT(::connect(fd, him, len));
  }
  
  inline struct hostent* os::get_host_by_name(char* name) {
    return ::gethostbyname(name);
--- 173,187 ----
  
  inline int os::send(int fd, char* buf, size_t nBytes, uint flags) {
    RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags));
  }
  
! inline int os::raw_send(int fd, char *buf, size_t nBytes, uint flags) {
    return os::send(fd, buf, nBytes, flags);
  }
  
! inline int os::connect(int fd, struct sockaddr *him, socklen_t len) {
    RESTARTABLE_RETURN_INT(::connect(fd, him, len));
  }
  
  inline struct hostent* os::get_host_by_name(char* name) {
    return ::gethostbyname(name);