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Subject: [Bug breakpoints/27313] Segfault in insert_catch_syscall
Date: Fri, 05 Feb 2021 16:47:12 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D27313

--- Comment #3 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gn=
u.org> ---
The master branch has been updated by Tom de Vries <vries@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=3Dbinutils-gdb.git;h=3D0e857c82883c=
ff04ccc8868762c78b0e94ccde91

commit 0e857c82883cff04ccc8868762c78b0e94ccde91
Author: Tom de Vries <tdevries@suse.de>
Date:   Fri Feb 5 17:47:07 2021 +0100

    [gdb/breakpoints] Fix segfault for catch syscall -1

    Using a hello world a.out, I run into a segfault:
    ...
    $ gcc hello.c
    $ gdb -batch a.out -ex "catch syscall -1" -ex r
    Catchpoint 1 (syscall -1)
    Aborted (core dumped)
    ...

    Fix this by erroring out if a negative syscall number is used in the
    catch syscall command.

    Tested on x86_64-linux.

    gdb/ChangeLog:

    2021-02-05  Tom de Vries  <tdevries@suse.de>

            PR breakpoints/27313
            * break-catch-syscall.c (catch_syscall_split_args): Reject nega=
tive
            syscall numbers.

    gdb/testsuite/ChangeLog:

    2021-02-05  Tom de Vries  <tdevries@suse.de>

            PR breakpoints/27313
            * gdb.base/catch-syscall.exp: Check that "catch syscall -1" is
            rejected.

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