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-rw-r--r--configure.ac3
-rw-r--r--include/osmocom/core/logging.h14
-rw-r--r--libosmocore.pc.in4
-rw-r--r--m4/ax_pthread.m4486
-rw-r--r--src/Makefile.am4
-rw-r--r--src/gb/gprs_bssgp_vty.c10
-rw-r--r--src/gb/gprs_ns_vty.c10
-rw-r--r--src/logging.c68
-rw-r--r--src/vty/logging_vty.c201
-rw-r--r--tests/Makefile.am4
-rw-r--r--tests/logging/logging_vty_test.c1
-rw-r--r--utils/Makefile.am4
12 files changed, 709 insertions, 100 deletions
diff --git a/configure.ac b/configure.ac
index 7ad5908d..39d232b3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -68,6 +68,9 @@ AC_SUBST(LIBRARY_DLSYM)
AC_CHECK_LIB(execinfo, backtrace, BACKTRACE_LIB=-lexecinfo, BACKTRACE_LIB=)
AC_SUBST(BACKTRACE_LIB)
+# check for pthread (PTHREAD_CFLAGS, PTHREAD_LIBS)
+AX_PTHREAD
+
# check for old glibc < 2.17 to get clock_gettime
AC_SEARCH_LIBS([clock_gettime], [rt posix4], [LIBRARY_RT="$LIBS";LIBS=""])
AC_SUBST(LIBRARY_RT)
diff --git a/include/osmocom/core/logging.h b/include/osmocom/core/logging.h
index 1a2d60bc..139d2916 100644
--- a/include/osmocom/core/logging.h
+++ b/include/osmocom/core/logging.h
@@ -380,4 +380,18 @@ void log_del_target(struct log_target *target);
struct log_target *log_target_find(int type, const char *fname);
+void log_enable_multithread(void);
+
+void log_tgt_mutex_lock_impl(void);
+void log_tgt_mutex_unlock_impl(void);
+#define LOG_MTX_DEBUG 0
+#if LOG_MTX_DEBUG
+ #include <pthread.h>
+ #define log_tgt_mutex_lock() do { fprintf(stderr, "[%lu] %s:%d [%s] lock\n", pthread_self(), __FILE__, __LINE__, __func__); log_tgt_mutex_lock_impl(); } while (0)
+ #define log_tgt_mutex_unlock() do { fprintf(stderr, "[%lu] %s:%d [%s] unlock\n", pthread_self(), __FILE__, __LINE__, __func__); log_tgt_mutex_unlock_impl(); } while (0)
+#else
+ #define log_tgt_mutex_lock() log_tgt_mutex_lock_impl()
+ #define log_tgt_mutex_unlock() log_tgt_mutex_unlock_impl()
+#endif
+
/*! @} */
diff --git a/libosmocore.pc.in b/libosmocore.pc.in
index d355659b..ce82d4f7 100644
--- a/libosmocore.pc.in
+++ b/libosmocore.pc.in
@@ -7,5 +7,5 @@ Name: Osmocom Core Library
Description: C Utility Library
Version: @VERSION@
Libs: -L${libdir} @TALLOC_LIBS@ -losmocore
-Cflags: -I${includedir}/ @TALLOC_CFLAGS@
-
+Libs.private: @PTHREAD_LIBS@
+Cflags: -I${includedir}/ @TALLOC_CFLAGS@ @PTHREAD_CFLAGS@
diff --git a/m4/ax_pthread.m4 b/m4/ax_pthread.m4
new file mode 100644
index 00000000..4920e073
--- /dev/null
+++ b/m4/ax_pthread.m4
@@ -0,0 +1,486 @@
+# ===========================================================================
+# https://www.gnu.org/software/autoconf-archive/ax_pthread.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+# AX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
+#
+# DESCRIPTION
+#
+# This macro figures out how to build C programs using POSIX threads. It
+# sets the PTHREAD_LIBS output variable to the threads library and linker
+# flags, and the PTHREAD_CFLAGS output variable to any special C compiler
+# flags that are needed. (The user can also force certain compiler
+# flags/libs to be tested by setting these environment variables.)
+#
+# Also sets PTHREAD_CC to any special C compiler that is needed for
+# multi-threaded programs (defaults to the value of CC otherwise). (This
+# is necessary on AIX to use the special cc_r compiler alias.)
+#
+# NOTE: You are assumed to not only compile your program with these flags,
+# but also to link with them as well. For example, you might link with
+# $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS
+#
+# If you are only building threaded programs, you may wish to use these
+# variables in your default LIBS, CFLAGS, and CC:
+#
+# LIBS="$PTHREAD_LIBS $LIBS"
+# CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+# CC="$PTHREAD_CC"
+#
+# In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute constant
+# has a nonstandard name, this macro defines PTHREAD_CREATE_JOINABLE to
+# that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX).
+#
+# Also HAVE_PTHREAD_PRIO_INHERIT is defined if pthread is found and the
+# PTHREAD_PRIO_INHERIT symbol is defined when compiling with
+# PTHREAD_CFLAGS.
+#
+# ACTION-IF-FOUND is a list of shell commands to run if a threads library
+# is found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it
+# is not found. If ACTION-IF-FOUND is not specified, the default action
+# will define HAVE_PTHREAD.
+#
+# Please let the authors know if this macro fails on any platform, or if
+# you have any other suggestions or comments. This macro was based on work
+# by SGJ on autoconf scripts for FFTW (http://www.fftw.org/) (with help
+# from M. Frigo), as well as ac_pthread and hb_pthread macros posted by
+# Alejandro Forero Cuervo to the autoconf macro repository. We are also
+# grateful for the helpful feedback of numerous users.
+#
+# Updated for Autoconf 2.68 by Daniel Richard G.
+#
+# LICENSE
+#
+# Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
+# Copyright (c) 2011 Daniel Richard G. <skunk@iSKUNK.ORG>
+#
+# This program is free software: you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation, either version 3 of the License, or (at your
+# option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+# Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program. If not, see <https://www.gnu.org/licenses/>.
+#
+# As a special exception, the respective Autoconf Macro's copyright owner
+# gives unlimited permission to copy, distribute and modify the configure
+# scripts that are the output of Autoconf when processing the Macro. You
+# need not follow the terms of the GNU General Public License when using
+# or distributing such scripts, even though portions of the text of the
+# Macro appear in them. The GNU General Public License (GPL) does govern
+# all other use of the material that constitutes the Autoconf Macro.
+#
+# This special exception to the GPL applies to versions of the Autoconf
+# Macro released by the Autoconf Archive. When you make and distribute a
+# modified version of the Autoconf Macro, you may extend this special
+# exception to the GPL to apply to your modified version as well.
+
+#serial 25
+
+AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD])
+AC_DEFUN([AX_PTHREAD], [
+AC_REQUIRE([AC_CANONICAL_HOST])
+AC_REQUIRE([AC_PROG_CC])
+AC_REQUIRE([AC_PROG_SED])
+AC_LANG_PUSH([C])
+ax_pthread_ok=no
+
+# We used to check for pthread.h first, but this fails if pthread.h
+# requires special compiler flags (e.g. on Tru64 or Sequent).
+# It gets checked for in the link test anyway.
+
+# First of all, check if the user has set any of the PTHREAD_LIBS,
+# etcetera environment variables, and if threads linking works using
+# them:
+if test "x$PTHREAD_CFLAGS$PTHREAD_LIBS" != "x"; then
+ ax_pthread_save_CC="$CC"
+ ax_pthread_save_CFLAGS="$CFLAGS"
+ ax_pthread_save_LIBS="$LIBS"
+ AS_IF([test "x$PTHREAD_CC" != "x"], [CC="$PTHREAD_CC"])
+ CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+ LIBS="$PTHREAD_LIBS $LIBS"
+ AC_MSG_CHECKING([for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS])
+ AC_LINK_IFELSE([AC_LANG_CALL([], [pthread_join])], [ax_pthread_ok=yes])
+ AC_MSG_RESULT([$ax_pthread_ok])
+ if test "x$ax_pthread_ok" = "xno"; then
+ PTHREAD_LIBS=""
+ PTHREAD_CFLAGS=""
+ fi
+ CC="$ax_pthread_save_CC"
+ CFLAGS="$ax_pthread_save_CFLAGS"
+ LIBS="$ax_pthread_save_LIBS"
+fi
+
+# We must check for the threads library under a number of different
+# names; the ordering is very important because some systems
+# (e.g. DEC) have both -lpthread and -lpthreads, where one of the
+# libraries is broken (non-POSIX).
+
+# Create a list of thread flags to try. Items starting with a "-" are
+# C compiler flags, and other items are library names, except for "none"
+# which indicates that we try without any flags at all, and "pthread-config"
+# which is a program returning the flags for the Pth emulation library.
+
+ax_pthread_flags="pthreads none -Kthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
+
+# The ordering *is* (sometimes) important. Some notes on the
+# individual items follow:
+
+# pthreads: AIX (must check this before -lpthread)
+# none: in case threads are in libc; should be tried before -Kthread and
+# other compiler flags to prevent continual compiler warnings
+# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
+# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads), Tru64
+# (Note: HP C rejects this with "bad form for `-t' option")
+# -pthreads: Solaris/gcc (Note: HP C also rejects)
+# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
+# doesn't hurt to check since this sometimes defines pthreads and
+# -D_REENTRANT too), HP C (must be checked before -lpthread, which
+# is present but should not be used directly; and before -mthreads,
+# because the compiler interprets this as "-mt" + "-hreads")
+# -mthreads: Mingw32/gcc, Lynx/gcc
+# pthread: Linux, etcetera
+# --thread-safe: KAI C++
+# pthread-config: use pthread-config program (for GNU Pth library)
+
+case $host_os in
+
+ freebsd*)
+
+ # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
+ # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
+
+ ax_pthread_flags="-kthread lthread $ax_pthread_flags"
+ ;;
+
+ hpux*)
+
+ # From the cc(1) man page: "[-mt] Sets various -D flags to enable
+ # multi-threading and also sets -lpthread."
+
+ ax_pthread_flags="-mt -pthread pthread $ax_pthread_flags"
+ ;;
+
+ openedition*)
+
+ # IBM z/OS requires a feature-test macro to be defined in order to
+ # enable POSIX threads at all, so give the user a hint if this is
+ # not set. (We don't define these ourselves, as they can affect
+ # other portions of the system API in unpredictable ways.)
+
+ AC_EGREP_CPP([AX_PTHREAD_ZOS_MISSING],
+ [
+# if !defined(_OPEN_THREADS) && !defined(_UNIX03_THREADS)
+ AX_PTHREAD_ZOS_MISSING
+# endif
+ ],
+ [AC_MSG_WARN([IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support.])])
+ ;;
+
+ solaris*)
+
+ # On Solaris (at least, for some versions), libc contains stubbed
+ # (non-functional) versions of the pthreads routines, so link-based
+ # tests will erroneously succeed. (N.B.: The stubs are missing
+ # pthread_cleanup_push, or rather a function called by this macro,
+ # so we could check for that, but who knows whether they'll stub
+ # that too in a future libc.) So we'll check first for the
+ # standard Solaris way of linking pthreads (-mt -lpthread).
+
+ ax_pthread_flags="-mt,pthread pthread $ax_pthread_flags"
+ ;;
+esac
+
+# GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC)
+
+AS_IF([test "x$GCC" = "xyes"],
+ [ax_pthread_flags="-pthread -pthreads $ax_pthread_flags"])
+
+# The presence of a feature test macro requesting re-entrant function
+# definitions is, on some systems, a strong hint that pthreads support is
+# correctly enabled
+
+case $host_os in
+ darwin* | hpux* | linux* | osf* | solaris*)
+ ax_pthread_check_macro="_REENTRANT"
+ ;;
+
+ aix*)
+ ax_pthread_check_macro="_THREAD_SAFE"
+ ;;
+
+ *)
+ ax_pthread_check_macro="--"
+ ;;
+esac
+AS_IF([test "x$ax_pthread_check_macro" = "x--"],
+ [ax_pthread_check_cond=0],
+ [ax_pthread_check_cond="!defined($ax_pthread_check_macro)"])
+
+# Are we compiling with Clang?
+
+AC_CACHE_CHECK([whether $CC is Clang],
+ [ax_cv_PTHREAD_CLANG],
+ [ax_cv_PTHREAD_CLANG=no
+ # Note that Autoconf sets GCC=yes for Clang as well as GCC
+ if test "x$GCC" = "xyes"; then
+ AC_EGREP_CPP([AX_PTHREAD_CC_IS_CLANG],
+ [/* Note: Clang 2.7 lacks __clang_[a-z]+__ */
+# if defined(__clang__) && defined(__llvm__)
+ AX_PTHREAD_CC_IS_CLANG
+# endif
+ ],
+ [ax_cv_PTHREAD_CLANG=yes])
+ fi
+ ])
+ax_pthread_clang="$ax_cv_PTHREAD_CLANG"
+
+ax_pthread_clang_warning=no
+
+# Clang needs special handling, because older versions handle the -pthread
+# option in a rather... idiosyncratic way
+
+if test "x$ax_pthread_clang" = "xyes"; then
+
+ # Clang takes -pthread; it has never supported any other flag
+
+ # (Note 1: This will need to be revisited if a system that Clang
+ # supports has POSIX threads in a separate library. This tends not
+ # to be the way of modern systems, but it's conceivable.)
+
+ # (Note 2: On some systems, notably Darwin, -pthread is not needed
+ # to get POSIX threads support; the API is always present and
+ # active. We could reasonably leave PTHREAD_CFLAGS empty. But
+ # -pthread does define _REENTRANT, and while the Darwin headers
+ # ignore this macro, third-party headers might not.)
+
+ PTHREAD_CFLAGS="-pthread"
+ PTHREAD_LIBS=
+
+ ax_pthread_ok=yes
+
+ # However, older versions of Clang make a point of warning the user
+ # that, in an invocation where only linking and no compilation is
+ # taking place, the -pthread option has no effect ("argument unused
+ # during compilation"). They expect -pthread to be passed in only
+ # when source code is being compiled.
+ #
+ # Problem is, this is at odds with the way Automake and most other
+ # C build frameworks function, which is that the same flags used in
+ # compilation (CFLAGS) are also used in linking. Many systems
+ # supported by AX_PTHREAD require exactly this for POSIX threads
+ # support, and in fact it is often not straightforward to specify a
+ # flag that is used only in the compilation phase and not in
+ # linking. Such a scenario is extremely rare in practice.
+ #
+ # Even though use of the -pthread flag in linking would only print
+ # a warning, this can be a nuisance for well-run software projects
+ # that build with -Werror. So if the active version of Clang has
+ # this misfeature, we search for an option to squash it.
+
+ AC_CACHE_CHECK([whether Clang needs flag to prevent "argument unused" warning when linking with -pthread],
+ [ax_cv_PTHREAD_CLANG_NO_WARN_FLAG],
+ [ax_cv_PTHREAD_CLANG_NO_WARN_FLAG=unknown
+ # Create an alternate version of $ac_link that compiles and
+ # links in two steps (.c -> .o, .o -> exe) instead of one
+ # (.c -> exe), because the warning occurs only in the second
+ # step
+ ax_pthread_save_ac_link="$ac_link"
+ ax_pthread_sed='s/conftest\.\$ac_ext/conftest.$ac_objext/g'
+ ax_pthread_link_step=`$as_echo "$ac_link" | sed "$ax_pthread_sed"`
+ ax_pthread_2step_ac_link="($ac_compile) && (echo ==== >&5) && ($ax_pthread_link_step)"
+ ax_pthread_save_CFLAGS="$CFLAGS"
+ for ax_pthread_try in '' -Qunused-arguments -Wno-unused-command-line-argument unknown; do
+ AS_IF([test "x$ax_pthread_try" = "xunknown"], [break])
+ CFLAGS="-Werror -Wunknown-warning-option $ax_pthread_try -pthread $ax_pthread_save_CFLAGS"
+ ac_link="$ax_pthread_save_ac_link"
+ AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])],
+ [ac_link="$ax_pthread_2step_ac_link"
+ AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])],
+ [break])
+ ])
+ done
+ ac_link="$ax_pthread_save_ac_link"
+ CFLAGS="$ax_pthread_save_CFLAGS"
+ AS_IF([test "x$ax_pthread_try" = "x"], [ax_pthread_try=no])
+ ax_cv_PTHREAD_CLANG_NO_WARN_FLAG="$ax_pthread_try"
+ ])
+
+ case "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" in
+ no | unknown) ;;
+ *) PTHREAD_CFLAGS="$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG $PTHREAD_CFLAGS" ;;
+ esac
+
+fi # $ax_pthread_clang = yes
+
+if test "x$ax_pthread_ok" = "xno"; then
+for ax_pthread_try_flag in $ax_pthread_flags; do
+
+ case $ax_pthread_try_flag in
+ none)
+ AC_MSG_CHECKING([whether pthreads work without any flags])
+ ;;
+
+ -mt,pthread)
+ AC_MSG_CHECKING([whether pthreads work with -mt -lpthread])
+ PTHREAD_CFLAGS="-mt"
+ PTHREAD_LIBS="-lpthread"
+ ;;
+
+ -*)
+ AC_MSG_CHECKING([whether pthreads work with $ax_pthread_try_flag])
+ PTHREAD_CFLAGS="$ax_pthread_try_flag"
+ ;;
+
+ pthread-config)
+ AC_CHECK_PROG([ax_pthread_config], [pthread-config], [yes], [no])
+ AS_IF([test "x$ax_pthread_config" = "xno"], [continue])
+ PTHREAD_CFLAGS="`pthread-config --cflags`"
+ PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
+ ;;
+
+ *)
+ AC_MSG_CHECKING([for the pthreads library -l$ax_pthread_try_flag])
+ PTHREAD_LIBS="-l$ax_pthread_try_flag"
+ ;;
+ esac
+
+ ax_pthread_save_CFLAGS="$CFLAGS"
+ ax_pthread_save_LIBS="$LIBS"
+ CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+ LIBS="$PTHREAD_LIBS $LIBS"
+
+ # Check for various functions. We must include pthread.h,
+ # since some functions may be macros. (On the Sequent, we
+ # need a special flag -Kthread to make this header compile.)
+ # We check for pthread_join because it is in -lpthread on IRIX
+ # while pthread_create is in libc. We check for pthread_attr_init
+ # due to DEC craziness with -lpthreads. We check for
+ # pthread_cleanup_push because it is one of the few pthread
+ # functions on Solaris that doesn't have a non-functional libc stub.
+ # We try pthread_create on general principles.
+
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>
+# if $ax_pthread_check_cond
+# error "$ax_pthread_check_macro must be defined"
+# endif
+ static void routine(void *a) { a = 0; }
+ static void *start_routine(void *a) { return a; }],
+ [pthread_t th; pthread_attr_t attr;
+ pthread_create(&th, 0, start_routine, 0);
+ pthread_join(th, 0);
+ pthread_attr_init(&attr);
+ pthread_cleanup_push(routine, 0);
+ pthread_cleanup_pop(0) /* ; */])],
+ [ax_pthread_ok=yes],
+ [])
+
+ CFLAGS="$ax_pthread_save_CFLAGS"
+ LIBS="$ax_pthread_save_LIBS"
+
+ AC_MSG_RESULT([$ax_pthread_ok])
+ AS_IF([test "x$ax_pthread_ok" = "xyes"], [break])
+
+ PTHREAD_LIBS=""
+ PTHREAD_CFLAGS=""
+done
+fi
+
+# Various other checks:
+if test "x$ax_pthread_ok" = "xyes"; then
+ ax_pthread_save_CFLAGS="$CFLAGS"
+ ax_pthread_save_LIBS="$LIBS"
+ CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+ LIBS="$PTHREAD_LIBS $LIBS"
+
+ # Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
+ AC_CACHE_CHECK([for joinable pthread attribute],
+ [ax_cv_PTHREAD_JOINABLE_ATTR],
+ [ax_cv_PTHREAD_JOINABLE_ATTR=unknown
+ for ax_pthread_attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>],
+ [int attr = $ax_pthread_attr; return attr /* ; */])],
+ [ax_cv_PTHREAD_JOINABLE_ATTR=$ax_pthread_attr; break],
+ [])
+ done
+ ])
+ AS_IF([test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xunknown" && \
+ test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xPTHREAD_CREATE_JOINABLE" && \
+ test "x$ax_pthread_joinable_attr_defined" != "xyes"],
+ [AC_DEFINE_UNQUOTED([PTHREAD_CREATE_JOINABLE],
+ [$ax_cv_PTHREAD_JOINABLE_ATTR],
+ [Define to necessary symbol if this constant
+ uses a non-standard name on your system.])
+ ax_pthread_joinable_attr_defined=yes
+ ])
+
+ AC_CACHE_CHECK([whether more special flags are required for pthreads],
+ [ax_cv_PTHREAD_SPECIAL_FLAGS],
+ [ax_cv_PTHREAD_SPECIAL_FLAGS=no
+ case $host_os in
+ solaris*)
+ ax_cv_PTHREAD_SPECIAL_FLAGS="-D_POSIX_PTHREAD_SEMANTICS"
+ ;;
+ esac
+ ])
+ AS_IF([test "x$ax_cv_PTHREAD_SPECIAL_FLAGS" != "xno" && \
+ test "x$ax_pthread_special_flags_added" != "xyes"],
+ [PTHREAD_CFLAGS="$ax_cv_PTHREAD_SPECIAL_FLAGS $PTHREAD_CFLAGS"
+ ax_pthread_special_flags_added=yes])
+
+ AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT],
+ [ax_cv_PTHREAD_PRIO_INHERIT],
+ [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]],
+ [[int i = PTHREAD_PRIO_INHERIT;
+ return i;]])],
+ [ax_cv_PTHREAD_PRIO_INHERIT=yes],
+ [ax_cv_PTHREAD_PRIO_INHERIT=no])
+ ])
+ AS_IF([test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes" && \
+ test "x$ax_pthread_prio_inherit_defined" != "xyes"],
+ [AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], [1], [Have PTHREAD_PRIO_INHERIT.])
+ ax_pthread_prio_inherit_defined=yes
+ ])
+
+ CFLAGS="$ax_pthread_save_CFLAGS"
+ LIBS="$ax_pthread_save_LIBS"
+
+ # More AIX lossage: compile with *_r variant
+ if test "x$GCC" != "xyes"; then
+ case $host_os in
+ aix*)
+ AS_CASE(["x/$CC"],
+ [x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6],
+ [#handle absolute path differently from PATH based program lookup
+ AS_CASE(["x$CC"],
+ [x/*],
+ [AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])],
+ [AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])])])
+ ;;
+ esac
+ fi
+fi
+
+test -n "$PTHREAD_CC" || PTHREAD_CC="$CC"
+
+AC_SUBST([PTHREAD_LIBS])
+AC_SUBST([PTHREAD_CFLAGS])
+AC_SUBST([PTHREAD_CC])
+
+# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
+if test "x$ax_pthread_ok" = "xyes"; then
+ ifelse([$1],,[AC_DEFINE([HAVE_PTHREAD],[1],[Define if you have POSIX threads libraries and header files.])],[$1])
+ :
+else
+ ax_pthread_ok=no
+ $2
+fi
+AC_LANG_POP
+])dnl AX_PTHREAD
diff --git a/src/Makefile.am b/src/Makefile.am
index 245eb6d5..5f5f0171 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -4,7 +4,7 @@
LIBVERSION=14:0:2
AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_builddir)/include
-AM_CFLAGS = -Wall $(TALLOC_CFLAGS)
+AM_CFLAGS = -Wall $(TALLOC_CFLAGS) $(PTHREAD_CFLAGS)
if ENABLE_PSEUDOTALLOC
AM_CPPFLAGS += -I$(top_srcdir)/src/pseudotalloc
@@ -12,7 +12,7 @@ endif
lib_LTLIBRARIES = libosmocore.la
-libosmocore_la_LIBADD = $(BACKTRACE_LIB) $(TALLOC_LIBS) $(LIBRARY_RT)
+libosmocore_la_LIBADD = $(BACKTRACE_LIB) $(TALLOC_LIBS) $(LIBRARY_RT) $(PTHREAD_LIBS)
libosmocore_la_SOURCES = context.c timer.c timer_gettimeofday.c timer_clockgettime.c \
select.c signal.c msgb.c bits.c \
bitvec.c bitcomp.c counter.c fsm.c \
diff --git a/src/gb/gprs_bssgp_vty.c b/src/gb/gprs_bssgp_vty.c
index 3af6517f..5dab94e7 100644
--- a/src/gb/gprs_bssgp_vty.c
+++ b/src/gb/gprs_bssgp_vty.c
@@ -181,21 +181,27 @@ DEFUN(logging_fltr_bvc,
"BVCI of the BVC to be filtered\n"
"BSSGP Virtual Connection Identifier (BVCI)\n")
{
- struct log_target *tgt = osmo_log_vty2tgt(vty);
+ struct log_target *tgt;
struct bssgp_bvc_ctx *bvc;
uint16_t nsei = atoi(argv[0]);
uint16_t bvci = atoi(argv[1]);
- if (!tgt)
+ log_tgt_mutex_lock();
+ tgt = osmo_log_vty2tgt(vty);
+ if (!tgt) {
+ log_tgt_mutex_unlock();
return CMD_WARNING;
+ }
bvc = btsctx_by_bvci_nsei(bvci, nsei);
if (!bvc) {
vty_out(vty, "No BVC by that identifier%s", VTY_NEWLINE);
+ log_tgt_mutex_unlock();
return CMD_WARNING;
}
log_set_bvc_filter(tgt, bvc);
+ log_tgt_mutex_unlock();
return CMD_SUCCESS;
}
diff --git a/src/gb/gprs_ns_vty.c b/src/gb/gprs_ns_vty.c
index 53c71a9a..4a904368 100644
--- a/src/gb/gprs_ns_vty.c
+++ b/src/gb/gprs_ns_vty.c
@@ -587,12 +587,16 @@ DEFUN(logging_fltr_nsvc,
"Identify NS-VC by NSVCI\n"
"Numeric identifier\n")
{
- struct log_target *tgt = osmo_log_vty2tgt(vty);
+ struct log_target *tgt;
struct gprs_nsvc *nsvc;
uint16_t id = atoi(argv[1]);
- if (!tgt)
+ log_tgt_mutex_lock();
+ tgt = osmo_log_vty2tgt(vty);
+ if (!tgt) {
+ log_tgt_mutex_unlock();
return CMD_WARNING;
+ }
if (!strcmp(argv[0], "nsei"))
nsvc = gprs_nsvc_by_nsei(vty_nsi, id);
@@ -601,10 +605,12 @@ DEFUN(logging_fltr_nsvc,
if (!nsvc) {
vty_out(vty, "No NS-VC by that identifier%s", VTY_NEWLINE);
+ log_tgt_mutex_unlock();
return CMD_WARNING;
}
log_set_nsvc_filter(tgt, nsvc);
+ log_tgt_mutex_unlock();
return CMD_SUCCESS;
}
diff --git a/src/logging.c b/src/logging.c
index 1c3544fa..b030f8a6 100644
--- a/src/logging.c
+++ b/src/logging.c
@@ -42,6 +42,7 @@
#include <time.h>
#include <sys/time.h>
#include <errno.h>
+#include <pthread.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/utils.h>
@@ -63,6 +64,56 @@ static struct log_context log_context;
void *tall_log_ctx = NULL;
LLIST_HEAD(osmo_log_target_list);
+#if (!EMBEDDED)
+/*! This mutex must be held while using osmo_log_target_list or any of its
+ log_targets in a multithread program. Prevents race conditions between threads
+ like producing unordered timestamps or VTY deleting a target while another
+ thread is writing to it */
+static pthread_mutex_t osmo_log_tgt_mutex;
+static bool osmo_log_tgt_mutex_on = false;
+
+/*! Enable multithread support (mutex) in libosmocore logging system.
+ * Must be called by processes willing to use logging subsystem from several
+ * threads. Once enabled, it's not possible to disable it again.
+ */
+void log_enable_multithread(void) {
+ if (osmo_log_tgt_mutex_on)
+ return;
+ pthread_mutex_init(&osmo_log_tgt_mutex, NULL);
+ osmo_log_tgt_mutex_on = true;
+}
+
+/*! Acquire the osmo_log_tgt_mutex. Don't use this function directly, always use
+ * macro log_tgt_mutex_lock() instead.
+ */
+void log_tgt_mutex_lock_impl(void) {
+ /* These lines are useful to debug scenarios where there's only 1 thread
+ and a double lock appears, for instance during startup and some
+ unlock() missing somewhere:
+ if (osmo_log_tgt_mutex_on && pthread_mutex_trylock(&osmo_log_tgt_mutex) != 0)
+ osmo_panic("acquiring already locked mutex!\n");
+ return;
+ */
+
+ if (osmo_log_tgt_mutex_on)
+ pthread_mutex_lock(&osmo_log_tgt_mutex);
+}
+
+/*! Release the osmo_log_tgt_mutex. Don't use this function directly, always use
+ * macro log_tgt_mutex_unlock() instead.
+ */
+void log_tgt_mutex_unlock_impl(void) {
+ if (osmo_log_tgt_mutex_on)
+ pthread_mutex_unlock(&osmo_log_tgt_mutex);
+}
+
+#else /* if (!EMBEDDED) */
+#pragma message ("logging multithread support disabled in embedded build")
+void log_enable_multithread(void) {}
+void log_tgt_mutex_lock_impl(void) {}
+void log_tgt_mutex_unlock_impl(void) {}
+#endif /* if (!EMBEDDED) */
+
const struct value_string loglevel_strs[] = {
{ LOGL_DEBUG, "DEBUG" },
{ LOGL_INFO, "INFO" },
@@ -532,6 +583,8 @@ void osmo_vlogp(int subsys, int level, const char *file, int line,
subsys = map_subsys(subsys);
+ log_tgt_mutex_lock();
+
llist_for_each_entry(tar, &osmo_log_target_list, entry) {
va_list bp;
@@ -548,6 +601,8 @@ void osmo_vlogp(int subsys, int level, const char *file, int line,
_output(tar, subsys, level, file, line, cont, format, bp);
va_end(bp);
}
+
+ log_tgt_mutex_unlock();
}
/*! logging function used by DEBUGP() macro
@@ -870,6 +925,7 @@ struct log_target *log_target_create_file(const char *fname)
* \param[in] type Log target type
* \param[in] fname File name
* \returns Log target (if found), NULL otherwise
+ * Must be called with mutex osmo_log_tgt_mutex held, see log_tgt_mutex_lock.
*/
struct log_target *log_target_find(int type, const char *fname)
{
@@ -942,6 +998,8 @@ int log_targets_reopen(void)
struct log_target *tar;
int rc = 0;
+ log_tgt_mutex_lock();
+
llist_for_each_entry(tar, &osmo_log_target_list, entry) {
switch (tar->type) {
case LOG_TGT_TYPE_FILE:
@@ -953,6 +1011,8 @@ int log_targets_reopen(void)
}
}
+ log_tgt_mutex_unlock();
+
return rc;
}
@@ -1015,6 +1075,8 @@ void log_fini(void)
{
struct log_target *tar, *tar2;
+ log_tgt_mutex_lock();
+
llist_for_each_entry_safe(tar, tar2, &osmo_log_target_list, entry)
log_target_destroy(tar);
@@ -1022,6 +1084,8 @@ void log_fini(void)
osmo_log_info = NULL;
talloc_free(tall_log_ctx);
tall_log_ctx = NULL;
+
+ log_tgt_mutex_unlock();
}
/*! Check whether a log entry will be generated.
@@ -1036,15 +1100,19 @@ int log_check_level(int subsys, unsigned int level)
/* TODO: The following could/should be cached (update on config) */
+ log_tgt_mutex_lock();
+
llist_for_each_entry(tar, &osmo_log_target_list, entry) {
if (!should_log_to_target(tar, subsys, level))
continue;
/* This might get logged (ignoring filters) */
+ log_tgt_mutex_unlock();
return 1;
}
/* We are sure, that this will not be logged. */
+ log_tgt_mutex_unlock();
return 0;
}
diff --git a/src/vty/logging_vty.c b/src/vty/logging_vty.c
index d639a8f7..88ee330a 100644
--- a/src/vty/logging_vty.c
+++ b/src/vty/logging_vty.c
@@ -101,6 +101,25 @@ struct log_target *log_target_create_vty(struct vty *vty)
return target;
}
+/*! Get tgt with log lock acquired, return and release lock with warning if tgt
+ * is not found. Lock must be released later with log_tgt_mutex_unlock().
+ */
+#define ACQUIRE_VTY_LOG_TGT_WITH_LOCK(vty, tgt) \
+ do { \
+ log_tgt_mutex_lock(); \
+ tgt = osmo_log_vty2tgt(vty); \
+ if (!(tgt)) { \
+ log_tgt_mutex_unlock(); \
+ return CMD_WARNING; \
+ } \
+ } while (0)
+
+#define RET_WITH_UNLOCK(ret) \
+ do { \
+ log_tgt_mutex_unlock(); \
+ return (ret); \
+ } while (0)
+
DEFUN(enable_logging,
enable_logging_cmd,
"logging enable",
@@ -118,11 +137,16 @@ DEFUN(enable_logging,
conn->dbg = log_target_create_vty(vty);
if (!conn->dbg)
return CMD_WARNING;
-
+ log_tgt_mutex_lock();
log_add_target(conn->dbg);
- return CMD_SUCCESS;
+ RET_WITH_UNLOCK(CMD_SUCCESS);
}
+/*! Get log target associated to VTY console.
+ * \param[in] vty Log target type
+ * \returns Log target (if logging enabled), NULL otherwise
+ * Must be called with mutex osmo_log_tgt_mutex held, see log_tgt_mutex_lock.
+ */
struct log_target *osmo_log_vty2tgt(struct vty *vty)
{
struct telnet_connection *conn;
@@ -146,13 +170,12 @@ DEFUN(logging_fltr_all,
"Only print messages matched by other filters\n"
"Bypass filter and print all messages\n")
{
- struct log_target *tgt = osmo_log_vty2tgt(vty);
+ struct log_target *tgt;
- if (!tgt)
- return CMD_WARNING;
+ ACQUIRE_VTY_LOG_TGT_WITH_LOCK(vty, tgt);
log_set_all_filter(tgt, atoi(argv[0]));
- return CMD_SUCCESS;
+ RET_WITH_UNLOCK(CMD_SUCCESS);
}
DEFUN(logging_use_clr,
@@ -162,13 +185,12 @@ DEFUN(logging_use_clr,
"Don't use color for printing messages\n"
"Use color for printing messages\n")
{
- struct log_target *tgt = osmo_log_vty2tgt(vty);
+ struct log_target *tgt;
- if (!tgt)
- return CMD_WARNING;
+ ACQUIRE_VTY_LOG_TGT_WITH_LOCK(vty, tgt);
log_set_use_color(tgt, atoi(argv[0]));
- return CMD_SUCCESS;
+ RET_WITH_UNLOCK(CMD_SUCCESS);
}
DEFUN(logging_prnt_timestamp,
@@ -178,13 +200,12 @@ DEFUN(logging_prnt_timestamp,
"Don't prefix each log message\n"
"Prefix each log message with current timestamp\n")
{
- struct log_target *tgt = osmo_log_vty2tgt(vty);
+ struct log_target *tgt;
- if (!tgt)
- return CMD_WARNING;
+ ACQUIRE_VTY_LOG_TGT_WITH_LOCK(vty, tgt);
log_set_print_timestamp(tgt, atoi(argv[0]));
- return CMD_SUCCESS;
+ RET_WITH_UNLOCK(CMD_SUCCESS);
}
DEFUN(logging_prnt_ext_timestamp,
@@ -195,13 +216,12 @@ DEFUN(logging_prnt_ext_timestamp,
"Don't prefix each log message\n"
"Prefix each log message with current timestamp with YYYYMMDDhhmmssnnn\n")
{
- struct log_target *tgt = osmo_log_vty2tgt(vty);
+ struct log_target *tgt;
- if (!tgt)
- return CMD_WARNING;
+ ACQUIRE_VTY_LOG_TGT_WITH_LOCK(vty, tgt);
log_set_print_extended_timestamp(tgt, atoi(argv[0]));
- return CMD_SUCCESS;
+ RET_WITH_UNLOCK(CMD_SUCCESS);
}
DEFUN(logging_prnt_cat,
@@ -212,13 +232,11 @@ DEFUN(logging_prnt_cat,
"Don't prefix each log message\n"
"Prefix each log message with category/subsystem name\n")
{
- struct log_target *tgt = osmo_log_vty2tgt(vty);
-
- if (!tgt)
- return CMD_WARNING;
+ struct log_target *tgt;
+ ACQUIRE_VTY_LOG_TGT_WITH_LOC