EVALUATION

use new pthread function to get stack attributes.
                                     

SUGGESTED FIX

*** /tmp/geta20883	2005-11-14 20:21:58.469671989 +0300
--- os_linux_i486.cpp	2005-11-14 20:21:29.793530284 +0300
***************
*** 567,574 ****
  //    |                        |/
  // P2 +------------------------+ Thread::stack_base()
  //
! // ** P2 is the address returned from pthread_attr_getstackaddr(), P2 - P1
! //    is the stack size returned by pthread_attr_getstacksize().
  
  static void current_stack_region(address * bottom, size_t * size) {
    if (os::Linux::is_initial_thread()) {
--- 567,574 ----
  //    |                        |/
  // P2 +------------------------+ Thread::stack_base()
  //
! // ** P2 is the address returned from pthread_attr_getstack(), P2 - P1
! //    is the stack size returned by pthread_attr_getstack().
  
  static void current_stack_region(address * bottom, size_t * size) {
    if (os::Linux::is_initial_thread()) {
***************
*** 590,605 ****
         }
       }
  
!      void * top;
!      if (pthread_attr_getstackaddr(&attr, &top) != 0 || 
!          pthread_attr_getstacksize(&attr, size) != 0) {
!          fatal("Can not locate current stack attributes!");
       }
! 
!      pthread_attr_destroy(&attr);
! 
!      *bottom = (address) align_size_up((uintptr_t)top - *size, os::Linux::page_size());
!      *size   = (address)top - *bottom;
    }
    assert(os::current_stack_pointer() >= *bottom &&
           os::current_stack_pointer() < *bottom + *size, "just checking");
--- 590,600 ----
         }
       }
  
!      if (pthread_attr_getstack(&attr, (void**)bottom, size) != 0) {
!        fatal("Can not locate current stack attributes!");
       }
!      
!      pthread_attr_destroy(&attr);     
    }
    assert(os::current_stack_pointer() >= *bottom &&
           os::current_stack_pointer() < *bottom + *size, "just checking");