[Bug gdb/15358] gdb deadlock due to gdb calling calloc() in signal handler.

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https://sourceware.org/bugzilla/show_bug.cgi?id=15358

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https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=06c868a8dc5ef46ab7dd6601c8bc2f417e415af9

commit 06c868a8dc5ef46ab7dd6601c8bc2f417e415af9
Author: Jan Kratochvil <jan.kratochvil@redhat.com>
Date:   Tue Mar 18 22:48:06 2014 +0100

    Fix SIGTERM signal safety (PR gdb/15358).

    gdb/
    2014-03-18  Jan Kratochvil  <jan.kratochvil@redhat.com>

        PR gdb/15358
        * defs.h (sync_quit_force_run): New declaration.
        (QUIT): Check also SYNC_QUIT_FORCE_RUN.
        * event-top.c (async_sigterm_handler): New declaration.
        (async_sigterm_token): New variable.
        (async_init_signals): Create also async_sigterm_token.
        (async_sigterm_handler): New function.
        (sync_quit_force_run): New variable.
        (handle_sigterm): Replace quit_force call by other calls.
        * utils.c (quit): Call quit_force if SYNC_QUIT_FORCE_RUN.

    gdb/testsuite/
    2014-03-18  Jan Kratochvil  <jan.kratochvil@redhat.com>

        PR gdb/15358
        * gdb.base/gdb-sigterm.c: New file.
        * gdb.base/gdb-sigterm.exp: New file.

    Message-ID: <20140316135334.GA30698@host2.jankratochvil.net>

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

Summary of changes:
 gdb/ChangeLog                          |   13 ++++
 gdb/defs.h                             |    5 +-
 gdb/event-top.c                        |   27 ++++++++-
 gdb/testsuite/ChangeLog                |    6 ++
 gdb/testsuite/gdb.base/gdb-sigterm.c   |   26 +++++++++
 gdb/testsuite/gdb.base/gdb-sigterm.exp |   96 ++++++++++++++++++++++++++++++++
 gdb/utils.c                            |    6 ++
 7 files changed, 176 insertions(+), 3 deletions(-)
 create mode 100644 gdb/testsuite/gdb.base/gdb-sigterm.c
 create mode 100644 gdb/testsuite/gdb.base/gdb-sigterm.exp

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