forked from Imagelibrary/binutils-gdb
236bb4b23d
This adds configury support and an RAII class that can be used to temporarily block signals that are used by gdb. (This class is not used in this patch, but it split out for easier review.) The idea of this patch is that these signals should only be delivered to the main thread. So, when creating a background thread, they are temporarily blocked; the blocked state is inherited by the new thread. gdb/ChangeLog 2019-09-30 Tom Tromey <tom@tromey.com> * gdbsupport/common.m4 (GDB_AC_COMMON): Check for pthread_sigmask. * configure: Rebuild. * gdbsupport/block-signals.h: New file. gdb/gdbserver/ChangeLog 2019-09-30 Tom Tromey <tom@tromey.com> * configure: Rebuild.
81 lines
2.7 KiB
Plaintext
81 lines
2.7 KiB
Plaintext
dnl Autoconf configure snippets for common.
|
|
dnl Copyright (C) 1995-2019 Free Software Foundation, Inc.
|
|
dnl
|
|
dnl This file is part of GDB.
|
|
dnl
|
|
dnl This program is free software; you can redistribute it and/or modify
|
|
dnl it under the terms of the GNU General Public License as published by
|
|
dnl the Free Software Foundation; either version 3 of the License, or
|
|
dnl (at your option) any later version.
|
|
dnl
|
|
dnl This program is distributed in the hope that it will be useful,
|
|
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
dnl GNU General Public License for more details.
|
|
dnl
|
|
dnl You should have received a copy of the GNU General Public License
|
|
dnl along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
dnl Invoke configury needed by the files in 'common'.
|
|
AC_DEFUN([GDB_AC_COMMON], [
|
|
AC_HEADER_STDC
|
|
AC_FUNC_ALLOCA
|
|
|
|
dnl Note that this requires codeset.m4, which is included
|
|
dnl by the users of common.m4.
|
|
AM_LANGINFO_CODESET
|
|
|
|
AC_CHECK_HEADERS(linux/perf_event.h locale.h memory.h signal.h dnl
|
|
sys/resource.h sys/socket.h dnl
|
|
sys/un.h sys/wait.h dnl
|
|
thread_db.h wait.h dnl
|
|
termios.h dnl
|
|
dlfcn.h)
|
|
|
|
AC_CHECK_FUNCS([fdwalk getrlimit pipe pipe2 socketpair sigaction])
|
|
|
|
AC_CHECK_DECLS([strerror, strstr])
|
|
|
|
# Check for std::thread. This does not work on some platforms, like
|
|
# mingw and DJGPP.
|
|
AC_LANG_PUSH([C++])
|
|
AX_PTHREAD([threads=yes], [threads=no])
|
|
if test "$threads" = "yes"; then
|
|
save_LIBS="$LIBS"
|
|
LIBS="$PTHREAD_LIBS $LIBS"
|
|
save_CXXFLAGS="$CXXFLAGS"
|
|
CXXFLAGS="$PTHREAD_CFLAGS $save_CFLAGS"
|
|
AC_CACHE_CHECK([for std::thread],
|
|
gdb_cv_cxx_std_thread,
|
|
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
|
|
[[#include <thread>
|
|
void callback() { }]],
|
|
[[std::thread t(callback);]])],
|
|
gdb_cv_cxx_std_thread=yes,
|
|
gdb_cv_cxx_std_thread=no)])
|
|
|
|
# This check must be here, while LIBS includes any necessary
|
|
# threading library.
|
|
AC_CHECK_FUNCS([pthread_sigmask])
|
|
|
|
LIBS="$save_LIBS"
|
|
CXXFLAGS="$save_CXXFLAGS"
|
|
fi
|
|
if test $gdb_cv_cxx_std_thread = yes; then
|
|
AC_DEFINE(CXX_STD_THREAD, 1,
|
|
[Define to 1 if std::thread works.])
|
|
fi
|
|
AC_LANG_POP
|
|
|
|
dnl Check if sigsetjmp is available. Using AC_CHECK_FUNCS won't
|
|
dnl do since sigsetjmp might only be defined as a macro.
|
|
AC_CACHE_CHECK([for sigsetjmp], gdb_cv_func_sigsetjmp,
|
|
[AC_TRY_COMPILE([
|
|
#include <setjmp.h>
|
|
], [sigjmp_buf env; while (! sigsetjmp (env, 1)) siglongjmp (env, 1);],
|
|
gdb_cv_func_sigsetjmp=yes, gdb_cv_func_sigsetjmp=no)])
|
|
if test $gdb_cv_func_sigsetjmp = yes; then
|
|
AC_DEFINE(HAVE_SIGSETJMP, 1, [Define if sigsetjmp is available. ])
|
|
fi
|
|
])
|