[Bug remote/19496] fork test failures in gdb.threads/forking-threads-plus-breakpoint with remote target

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=19496

--- Comment #1 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Pedro Alves <palves@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=6b2e4f10aeb64868720de06d3b2da3cc2d908f10

commit 6b2e4f10aeb64868720de06d3b2da3cc2d908f10
Author: Pedro Alves <palves@redhat.com>
Date:   Mon Feb 1 18:48:04 2016 +0000

    Test gdb.threads/forking-threads-plus-breakpoint.exp with displaced
stepping off

    This exposes the internal error Don mentioned in PR19496:

      (1) internal error --  gdb/target.c:2713: internal-error: Can't determine
the current address space of thread

    More analysis here:

      https://sourceware.org/ml/gdb-patches/2016-01/msg00685.html

    The (now kfailed) internal error looks like:

     continue &
     Continuing.
     (gdb) PASS: gdb.threads/forking-threads-plus-breakpoint.exp:
cond_bp_target=1: detach_on_fork=on: displaced=off: continue &
     [New Thread 2846.2847]
     (...)
     [New Thread 2867.2867]
     /home/pedro/gdb/mygit/src/gdb/target.c:2723: internal-error: Can't
determine the current address space of thread Thread 2846.2846

     A problem internal to GDB has been detected,
     further debugging may prove unreliable.
     Quit this debugging session? (y or n) KFAIL:
gdb.threads/forking-threads-plus-breakpoint.exp: cond_bp_target=1:
detach_on_fork=on: displaced=off: inferior 1 exited (GDB internal error) (PRMS:
remote/19496)
     Resyncing due to internal error.

    gdb/testsuite/ChangeLog:
    2016-02-01  Pedro Alves  <palves@redhat.com>

        PR remote/19496
        * gdb.threads/forking-threads-plus-breakpoint.exp
        (displaced_stepping_supported): New global.
        (probe_displaced_stepping_support): New procedure.
        (do_test): Add 'displaced' parameter, and use it.
        (top level): Check for displaced stepping support.  Add displaced
        stepping on/off testing axis.

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