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<pre>
<center><b><font color=660066>
OpenVMS VMS712_LIBRTL-V0100 Alpha V7.1-2 LIBRTL ECO Summary
</font></b></center><p>
TITLE: OpenVMS VMS712_LIBRTL-V0100 Alpha V7.1-2 LIBRTL ECO Summary
 
New Kit:            24-JAN-2001
Modification Date:  06-MAR-2001
Modification Type:  Documentation:  Corrected kit name in Kit
                                    Dependencies section.

NOTE:  An OpenVMS saveset or PCSI installation file is stored
       on the Internet in a self-expanding compressed file.
 
       For OpenVMS savesets, the name of the compressed saveset
       file will be kit_name.a-dcx_vaxexe for OpenVMS VAX or
       kit_name.a-dcx_axpexe for OpenVMS Alpha. Once the OpenVMS
       saveset is copied to your system, expand the compressed
       saveset by typing RUN kitname.dcx_vaxexe or kitname.dcx_alpexe.
 
       For PCSI files, once the PCSI file is copied to your system,
       rename the PCSI file to kitname-dcx_axpexe.pcsi, then it can
       be expanded by typing RUN kitname-dcx_axpexe.pcsi.  The resultant
       file will be the PCSI installation file which can be used to install
       the ECO.
 
Copyright (c) Compaq Computer Corporation 2000.  All rights reserved.

OP/SYS:     OpenVMS Alpha

COMPONENT:  LIBRTL

SOURCE:     Compaq Computer Corporation

ECO INFORMATION:

     ECO Kit Name:  VMS712_LIBRTL-V0100
                    DEC-AXPVMS-VMS712_LIBRTL-V0100--4.PCSI
     ECO Kits Superseded by This ECO Kit:  None
     ECO Kit Approximate Size:  4176 Blocks
     Kit Applies To:  OpenVMS Alpha V7.1-2
     System/Cluster Reboot Necessary:  Yes
     Rolling Re-boot Supported:  Yes
     Installation Rating:  INSTALL_3
                            3 - To be installed on all systems running
                                the listed versions of OpenVMS which
                                are experiencing the problems described.

     Kit Dependencies:

       The following remedial kit(s) must be installed BEFORE
       installation of this kit:

	     VMS712_UPDATE-V0300 
             VMS62TO71U2_PCSI-V0100

       In order to receive all the corrections listed in this
       kit, the following remedial kits should also be installed:

         None



ECO KIT SUMMARY:

An ECO kit exists for LIBRTL on OpenVMs Alpha V7.1-2
This kit addresses the following problems: 

Problems Addressed In VMS712_LIBRTL-V0100:

   o  A failure to unwind properly occurs when  a  large  amount  of
      stack space is being used.  This could result in an improperly
      handled condition error, or a bad stack notification, or other
      error.

          Images Affected:  [SYSLIB]LIBRTL.EXE
                            [SYSLIB]LIBRTL_INSTRUMENTED.EXE


   o  A synchonization failure occurs for multithread programs using
      the DEC C RTL routine malloc and free with "long" pointers (P2
      space heap routines).  These DEC C RTL routines  in  turn  use
      the   LIBRTL  Routines  LIB$VM_MALLOC_64  and  LIB$VM_FREE_64.
      Symptoms could be varied, including "%LIB-F-MEMALRFRE,  memory
      already free" errors.

      For an application to see this problem it would have to do all
      of the following:

           -  Call the DEC C RTL routines malloc and free

           -  Be multithreaded

           -  Be compiled with the/POINTER_SIZE=LONG  and
              /REENTRANCY=MULTITHREAD switches

           -  Be linked
              /THREADS_ENABLE=(MULTIPLE_KERNEL_THREADS,UPCALLS)

           -  Be run on a  multiprocessor  system  with  kernel  threads
              enabled.


          Images Affected:  [SYSLIB]LIBRTL.EXE
                            [SYSLIB]LIBRTL_INSTRUMENTED.EXE


   o  STR$DIVIDE produces incorrect results for  certain  divisions.
      For example:

          A:  sign =  0,  exp = -2,  digits = "41291"
          B:  sign =  0,  exp = -6,  digits = "787564"
          rndtrc = 1, totdig = 2

          The incorrect result is:

          C:  sign =  0,  exp = -2,  digits = "28147068226765"

          The the correct result is:

          C:  sign =  0,  exp = -2,  digits = "52429"


          Note that STR$DIVIDE is used by the basic RTL and this problem
          was  initially  reported  as  a  problem  with  the BASIC $QUO
          function.     

          Images Affected:  [SYSLIB]LIBRTL.EXE
                            [SYSLIB]LIBRTL_INSTRUMENTED.EXE


   o  STR$DIVIDE will  report  a  memory  allocation  error  if  the
      TOT_DIGITS parameter is negative.

          Images Affected:  [SYSLIB]LIBRTL.EXE
                            [SYSLIB]LIBRTL_INSTRUMENTED.EXE


   o  STR$COPY_R may erroneously return STR$_FATINTERR under certain
      conditions  involving  freeing  the  previous  contents  of  a
      dynamic string.  This problem may also occur with the  routine
      LIB$SCOPY_R_DX.   These  routines are frequently used by other
      RTL   routines   to   return   string   values.     Therefore,
      STR$_FATINTERR  may be returned or signaled by a number of RTL
      routines, including the BASIC RTL.  The conditions needed  for
      this to occur are rare.

          Images Affected:  [SYSLIB]LIBRTL.EXE
                            [SYSLIB]LIBRTL_INSTRUMENTED.EXE


   o  LIB$FIND_VM_ZONE does  not  show  all  zones  when  there  are
      multiple zones created and the algorithm is VM_FIXED.

          Images Affected:  [SYSLIB]LIBRTL.EXE
                            [SYSLIB]LIBRTL_INSTRUMENTED.EXE



INSTALLATION NOTES:

This kit requires a system reboot.  Compaq strongly recommends that
a  reboot  is performed immediately after kit installation to avoid
system instability

If you have other nodes in your OpenVMS cluster, they must also  be
rebooted  in  order  to make use of the new image(s).  If it is not
possible or convenient to reboot the entire cluster at this time, a
rolling re-boot may be performed.

Install this kit with the POLYCENTER Software installation  utility
by logging into the SYSTEM account, and typing the following at the
DCL prompt:

PRODUCT INSTALL VMS712_LIBRTL /SOURCE=[location of Kit]

The kit location may be a tape drive, CD, or a disk directory that
contains the kit.

Additional help on installing PCSI kits can be found by typing
HELP PRODUCT INSTALL at the system prompt


All trademarks are the property of their respective owners.
</pre>
<hr><br>
<font color=660066 size=+1>This patch can be found at any of these sites:</font><p>
<a name=colorado>
<a href=http://ftp1.support.compaq.com/patches/public/vms/axp/v7.1-2/dec-axpvms-vms712_librtl-v0100--4.README>Colorado Site</a><br>
<a name=georgia>
<a href=http://ftp11.support.compaq.com/patches/public/vms/axp/v7.1-2/dec-axpvms-vms712_librtl-v0100--4.README>Georgia Site</a><br>
<hr><br>
<font color=660066 size=+1>Files on this server are as follows:</font><p>
<pre>
<a href=/patches/public/vms/axp/v7.1-2/dec-axpvms-vms712_librtl-v0100--4.README>dec-axpvms-vms712_librtl-v0100--4.README</a>
<a href=/patches/public/vms/axp/v7.1-2/dec-axpvms-vms712_librtl-v0100--4.CHKSUM>dec-axpvms-vms712_librtl-v0100--4.CHKSUM</a>
<a href=/patches/public/vms/axp/v7.1-2/dec-axpvms-vms712_librtl-v0100--4.pcsi-dcx_axpexe>dec-axpvms-vms712_librtl-v0100--4.pcsi-dcx_axpexe</a>
<a href=/patches/public/vms/axp/v7.1-2/vms712_librtl-v0100.CVRLET_TXT>vms712_librtl-v0100.CVRLET_TXT</a>
</pre>

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