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No 64 bit version of dbx on Developer Studio 12.5

User12606988-Oracle
User12606988-Oracle Member Posts: 7
edited Oct 3, 2016 5:22PM in Developer Studio IDE, Debugging, and Analysis Tools

When trying to debug an application on the new 12.5 version I notice that there is no amd64 version of the dbx (version 8.1)?

Is there a 64 bit version available as I get the following message 'dbx: 32-bit dbx can't debug 64-bit app'.

I know I can do a symbolic link to the amd64 version in Sunstudio 12.4 but that does not seem like the right thing to do ?

Thanks

Johan

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Answers

  • Ivanigorovich-Oracle
    Ivanigorovich-Oracle Member Posts: 69
    edited Sep 9, 2016 3:00PM

    Prior to 12.5 the dbx in .../bin was a 32-bit dbx which automatically overlayed the

    correct 64-bit dbx on top of itself unless the -xexec32 option was used:

    .../bin/dbx           32 bit

    .../bin/amd64/dbx     64 bit

    You are meant to put .../bin in your $PATH.

    Starting with 12.5 we switched the binaries around a bit.

    .../bin/dbx           64 bit     # no need for overlay

    .../lib/dbx/32/dbx    32 bit     # will be used is -xexec32 is used               

    You are, again, meant to put .../bin in your $PATH.

    I'm guessing previously you had .../bin/amd64 in your path and then it vanished

    so you put .../lib/dbx/32 in your path?

    Or somehow the installation went awry?

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  • User12606988-Oracle
    User12606988-Oracle Member Posts: 7
    edited Sep 17, 2016 1:05PM

    Thanks for clarifying , however I did have the path setup and the path is definitely pointing to the right bin directory. Not sure if it has anything to do with me running this on Ubuntu 16.04 , see below . There is a reference to a 'disassembler_version: not found'

    $ which dbx

    /opt/developerstudio12.5/bin/dbx

    [email protected]:~/LODS/src/wwopsbig/apps/r12/SupplyChainExposure/InventoryEtl/bin$ dbx -I ../src InventoryEtl

    dbx: 32-bit dbx can't debug 64-bit app 'InventoryEtl'

    disassembler_version: not found

    error at line 1 of file './.dbxrc'

    (dbx)

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  • Ivanigorovich-Oracle
    Ivanigorovich-Oracle Member Posts: 69
    edited Sep 19, 2016 3:41PM

    Even on Linux the following should be true:

    .../bin/dbx           64 bit     # no need for overlay

    .../lib/dbx/32/dbx    32 bit     # will be used is -xexec32 is

    Can you use the 'file' command to verify the bitness of these dbx's

    in your installation?

    I downloaded and installed the "tarball"s from the download site and

    they seem to be correct. If you used the RPM packages maybe there's

    a mistake in their content.

    Instead of relying on 'which' and $PATH experiment with absolute

    pathnames first.

    ---------------------------------------------------------------------

    'disassembler_version' is the name of a 'dbxenv' (Issue "help dbxenv"

    at the dbx commandline). One gets and sets dbxenvs like this:

    (dbx-0) dbxenv disassembler_version                                         
    autodetect
    (dbx-0) dbxenv disassembler_version v9
    (dbx-0) dbxenv disassembler_version  
    v9
    (dbx-0) disassembler_version v8     # forgot 'dbxenv' 
    disassembler_version: not found     # looks familiar?

    So, What's on line 1 of "./.dbxrc"?

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  • User12606988-Oracle
    User12606988-Oracle Member Posts: 7
    edited Sep 19, 2016 9:22PM

    You are right about the 'dissembler_version' there was a local .dbxrc file in the directory that had that as the only entry .

    This is the out put from the file command. Which looks like it would indicated that it is 64 bit ?. I'll try to re-install to see if that changes anything, as I still get that message.

    [email protected]:/opt/developerstudio12.5/bin$ file dbx

    dbx: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, stripped

    Thanks

    Johan

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  • Ivanigorovich-Oracle
    Ivanigorovich-Oracle Member Posts: 69
    edited Sep 19, 2016 10:31PM

    Let's not quite reinstall things yet because 'file dbx' said that it's a 64-bit executable

    and that doesn't indicate a bad install.

    Now the puzzle is, why, if you're executing a 64-bit dbx, is

    it saying: dbx: 32-bit dbx can't debug 64-bit app.

    So I urge you again to use absolute pathnames and see what happens:

         /opt/developerstudio12.5/bin/dbx InventoryEtl

    vs

         /opt/developerstudio12.5/lib/dbx/32/dbx InventoryEtl

    Wild idea: You have an alias/function "dbx=dbx -xexec32"

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  • User12606988-Oracle
    User12606988-Oracle Member Posts: 7
    edited Sep 21, 2016 2:34PM

    As an FYI I installed the tar binaries on an environment at work Ubuntu 14.04 and it worked fine. I'll have to check your suggestion later on this evening on the 16.04. Another thing I forgot to say was that I used a symbolic link to change the provided linker (ld) to point to  the system version /usr/bin/ld  as I always got an error on the Studio version.  I doubt that has a bearing as the executable works fine ?

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  • User12606988-Oracle
    User12606988-Oracle Member Posts: 7
    edited Sep 22, 2016 12:01PM

    Here are the dbxenv setting after I run dbx against the executable

    $ dbx -I ../src InventoryEtl

    dbx: 32-bit dbx can't debug 64-bit app 'InventoryEtl'

    (dbx) dbxenv

    array_bounds_check       on

    c_array_op               off

    core_lo_pathmap          off

    ddl_version              3

    debug_file_directory     /usr/lib/debug

    disassembler_version     autodetect

    event_safety             on

    filter_max_length        512

    fix_verbose              off

    follow_fork_inherit      off

    follow_fork_mode         parent

    follow_fork_mode_inner   unset

    gui_error_verbose        off

    gui_show_main            on

    input_case_sensitive     autodetect

    language_mode            autodetect

    macro_expand             on

    macro_source             skim_unless_compiler

    mi_mode                  off

    mt_resume_one            auto

    mt_scalable              off

    mt_sync_tracking         off

    output_auto_flush        on

    output_base              automatic

    output_class_prefix      on

    output_data_member_only  off

    output_dynamic_type      off

    output_inherited_members off

    output_list_size         10

    output_log_file_name     /tmp/dbx.log.21784.1000.0

    output_max_object_size   4096

    output_max_string_length 4096

    output_no_literal        off

    output_pretty_print      off

    output_pretty_print_fallback on

    output_pretty_print_mode call

    output_short_file_name   on

    overload_function        on

    overload_operator        on

    pop_auto_destruct        on

    proc_exclusive_attach    on

    proc_track_cwd           off

    rtc_auto_continue        off

    rtc_auto_suppress        on

    rtc_biu_at_exit          on

    rtc_error_limit          1000

    rtc_error_log_file_name  /tmp/dbx.errlog.21784.1000.3

    rtc_error_stack          off

    rtc_inherit              off

    rtc_mel_at_exit          on

    run_autostart            off

    run_io                   stdio

    run_pty                 

    run_quick                off

    run_savetty              off

    run_setpgrp              off

    scope_global_enums       off

    scope_look_aside         on

    session_log_file_name   

    show_static_members      on

    stack_find_source        on

    stack_max_size           100

    stack_verbose            on

    step_abflow              stop

    step_events              off

    step_granularity         statement

    suppress_startup_message 3.01

    symbol_info_compression  on

    trace_speed              0.50

    vdl_mode                 lisp

    vdl_version              2

    (dbx)

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  • Ivanigorovich-Oracle
    Ivanigorovich-Oracle Member Posts: 69
    edited Sep 22, 2016 3:37PM

    The linker has no bearing on this.

    The list of dbxenv's doesn't help diagnose the issue.

    What _will_ is specifically the following:

    $ file /opt/developerstudio12.5/bin/dbx

    $ /opt/developerstudio12.5/bin/dbx InventoryEtl

    $ file /opt/developerstudio12.5/lib/dbx/32/dbx

    $ /opt/developerstudio12.5/lib/dbx/32/dbx InventoryEtl

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  • User12606988-Oracle
    User12606988-Oracle Member Posts: 7
    edited Oct 3, 2016 12:04PM

    Hi , sorry for the delay..

    The problem seems to be related to Ubuntu 16.04. Everything works fine on Ubuntu 14.04. To verify I installed this all on a completely different system with 16.04 and I get the exact same problem. Could it be related to the libraries installed. I.e. dbx is trying to load an i386 library where the 64 bit version is missing on 16.04 ?.

    Although when I compare the 'ldd dbx' results across 12.4 and 12.5 both on Ubuntu 14.04 and 16.04 they look nearly identical outside of the version of the demangle library ?

    With respect your above question it all returns what you would expect ?

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  • Ivanigorovich-Oracle
    Ivanigorovich-Oracle Member Posts: 69
    edited Oct 3, 2016 3:09PM

    The fact that it works on one version of ubuntu but not another, at this moment, does not

    help diagnose the issue.

    Speculation about shared libraries doesn't help diagnose the issue.

    What _will_ help is specifically the following:

    $ file /opt/developerstudio12.5/bin/dbx

    $ /opt/developerstudio12.5/bin/dbx InventoryEtl

    $ file /opt/developerstudio12.5/lib/dbx/32/dbx

    $ /opt/developerstudio12.5/lib/dbx/32/dbx InventoryEtl

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  • User12606988-Oracle
    User12606988-Oracle Member Posts: 7
    edited Oct 3, 2016 5:18PM

    Below are the results of the commands you specified .

    Thanks

    $ file /opt/developerstudio12.5/bin/dbx

    dbx: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, stripped

    $ /opt/developerstudio12.5/bin/dbx InventoryEtl

    InventoryETL: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, not stripped

    $ file /opt/developerstudio12.5/lib/dbx/32/dbx

    dbx: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, stripped

    $ /opt/developerstudio12.5/lib/dbx/32/dbx InventoryEtl

    dbx: 32-bit dbx can't debug 64-bit app 'InventoryETL'

    For information about new features see `help changes'

    To remove this message, put `dbxenv suppress_startup_message 8.1' in your .dbxrc

    (dbx)

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  • Ivanigorovich-Oracle
    Ivanigorovich-Oracle Member Posts: 69
    edited Oct 3, 2016 5:22PM

    The second command is supposed to be 'dbx InventoryEtl' not 'file InventoryEtl'.

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This discussion has been closed.