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[Bug server/17023] gdbserver crash inserting breakpoint on LynxOS


https://sourceware.org/bugzilla/show_bug.cgi?id=17023

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https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=ef7cab6ba16d76c3470fb27a0c8966513f7cb34a

commit ef7cab6ba16d76c3470fb27a0c8966513f7cb34a
Author: Joel Brobecker <brobecker@adacore.com>
Date:   Wed Jun 4 14:03:22 2014 -0400

    gdbserver crash if the_target->supports_z_point_type is NULL

    When debugging on LynxOS targets (and probably on SPU targets as well),
    inserting a breakpoint and resuming the program's execution causes
    GDBserver to crash.

    The crash occurs while handling the Z0 packet sent by GDB to insert
    our breakpoint, because z_type_supported calls
    the_target->supports_z_point_type without checking that it is not NULL
    This patch fixes the issue by making z_type_supported return false if
    the_target->supports_z_point_type is NULL.

    gdb/gdbserver/ChangeLog:

            PR server/17023
            * mem-break.c (z_type_supported): Return zero if
            THE_TARGET->SUPPORTS_Z_POINT_TYPE is NULL.

    Tested on ppx-lynx5.

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

Summary of changes:
 gdb/ChangeLog             |    6 ++++++
 gdb/gdbserver/mem-break.c |    1 +
 2 files changed, 7 insertions(+), 0 deletions(-)

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