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<pre>
<center><b><font color=660066>
OpenVMS VMS721_LIBRTL-V0100 Alpha V7.2-1 LIBRTL ECO Summary
</font></b></center><p>
TITLE: OpenVMS VMS721_LIBRTL-V0100 Alpha V7.2-1 LIBRTL ECO Summary
 
New Kit:            05-DEC-2000
Modification Date:  15-FEB-2001
Modification Type:  Corrected typo in file name.

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.
 
OP/SYS:     OpenVMS Alpha

COMPONENT:  LIBRTL

SOURCE:     Compaq Computer Corporation

ECO INFORMATION:

     ECO Kit Name:  VMS721_LIBRTL-V0100
                    DEC-AXPVMS-VMS721_LIBRTL-V0100--4.PCSI
     ECO Kits Superseded by This ECO Kit:  None
     ECO Kit Approximate Size:  4304 Blocks
     Kit Applies To:  OpenVMS Alpha V7.2-1
     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:

         VMS721_UPDATE-V0100
         VMS721_PCSI-V0100

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

         None

NOTE: DATMISMCH errors may occur in IMAGELIB when linking against 
      LIBRTL after installing VMS721_LIBRTL-V0100 (this kit).  The
      IMAGELIB may be inserted manually to correct this problem by
      issuing the following command from a privileged account.  Use
      of the SYSTEM account is suggested.

         $ LIBRARY/REPLACE SYS$SHARE:IMAGELIB SYS$SHARE:LIBRTL.EXE    



ECO KIT SUMMARY:

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

Problems Addressed in VMS721_LIBRTL-V0100:

  o   A memory leak occurs when using LIB$FIND_FILE/LIB$FIND_FILE_END
      with long file names (flags=LIB$M_FIL_LONG_NAMES).

          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  have
      the following characteristics:

          1. Call the DEC C RTL routines malloc and free

          2. Be multithreaded

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

          4. Be linked /THREADS_ENABLE=(MULTIPLE_KERNEL_THREADS,UPCALLS)

          5. Run  on  a  multiprocessor  system  with  kernel   threads
             enabled.

      Note that programs using the "normal" P0 heap routines are not
      affected by this problem.

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

  o   The LIB$CREATE_DIR RTL routine is documented to accept 64  bit
      parameters.   However,  passing  a  64  bit  descriptor to the
      routine fails with a LIB$_INVSTRDES error or passing a 64  bit
      address may result in an SS$_ACCVIO error.

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


  o   A program can fail with the following error:

         %LIB-W-ILLRECTYP, illegal record type (nnn)
         %TRACE-W-TRACEBACK, symbolic stack dump follows

      followed by:

         %SYSTEM-F-ACCVIO, access violation, reason mask=00,
         virtual address=0000000000000008, PC=nnnnnnnnnnnnnnnn, 
         PS=0000001B

      if the program:

          1.  Is created that is directly linked with a shareable image

          2.  Calls LIB$FIND_IMAGE_SYMBOL to find an entry point in  the
              same shareable image

          3.  The program is executed and the user creates a new version
              of the shareable image while the program is executing

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

  o   LIB$FIND_IMAGE_SYMBOL fails to locate symbols for images  whose
      record attributes have been altered.

      This has been seen with DCOM as follows:

        $ mcr DCOM$COMREGEDT

        %SYSTEM-F-ACCVIO, access violation, reason mask=00,
        virtual address=0000000000000008, PC=0000000000B43348, 
        PS=0000001B

        Improperly handled condition, image exit forced.
        Signal arguments:   Number = 0000000000000005
                            Name   = 000000000000000C
                                     0000000000000000
                                     0000000000000008
                                     0000000000B43348
                                     000000000000001B

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

  o   LIB$FIND_IMAGE_SYMBOL fails for images on disks  whose  device
      names  are more than 13 characters - which generally means a 3
      digit unit number.

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

  o   In the case of a $ PRINT [X]FOO.PRF,;-1 command, LIB$FIND_FILE
      may  fail  to find the second file (;-1).  This problem may be
      seen with certain DCL commands, such as PRINT, and  with  user
      application  calls  to LIB$FIND FILE when LIB$M_FIL_LONG_NAMES
      and the "multiple" flags are set (bits 1 and 2  of  the  flags
      argument).

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

  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


INSTALLATION NOTES:

The images in this kit will not take effect until the system is
rebooted.  If there are other nodes in the VMScluster, 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 VMS721_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/v7.2-1/dec-axpvms-vms721_librtl-v0100--4.README>Colorado Site</a><br>
<a name=georgia>
<a href=http://ftp11.support.compaq.com/patches/public/vms/axp/v7.2-1/dec-axpvms-vms721_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/v7.2-1/dec-axpvms-vms721_librtl-v0100--4.README>dec-axpvms-vms721_librtl-v0100--4.README</a>
<a href=/patches/public/vms/axp/v7.2-1/dec-axpvms-vms721_librtl-v0100--4.CHKSUM>dec-axpvms-vms721_librtl-v0100--4.CHKSUM</a>
<a href=/patches/public/vms/axp/v7.2-1/dec-axpvms-vms721_librtl-v0100--4.pcsi-dcx_axpexe>dec-axpvms-vms721_librtl-v0100--4.pcsi-dcx_axpexe</a>
<a href=/patches/public/vms/axp/v7.2-1/vms721_librtl-v0100.CVRLET_TXT>vms721_librtl-v0100.CVRLET_TXT</a>
</pre>

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