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libqb/tests/Makefile.am
Jan Pokorný 28e725938a
tests: ipc: check deadlock-like situation due to mixing priorities 
Compared to the outer world, libqb brings rather unintuitive approach
to priorities within a native event loop (qbloop.h) -- it doesn't do
an exhaustive high-to-low priorities in a batched (clean-the-level)
manner, but rather linearly adds a possibility to pick the handling
task from the higher priority level as opposed to lower priority ones.

This has the advantage of limiting the chances of starvation and
deadlock opportunities in the incorrectly constructed SW, on the other
hand, it means that libqb is not fulfilling the architected intentions
regarding what deserves a priority truthfully, so these priorities are
worth just a hint rather than urgency-based separation.

And consequently, a discovery of these deadlocks etc. is deferred to
the (as Murphy's laws have it) least convenient moment, e.g., when
said native event loop is exchanged for other (this time priority
trully abiding, like GLib) implementation, while retaining the same
basic notion and high-level handling of priorities on libqb
side, in IPC server (service handling) context.

Hence, demonstration of such a degenerate blocking is not trivial,
and we must defer such other event loop implementation.  After this
hassle, we are rewarded with a practical proof said "high-level
handling [...] in IPC server (service handling) context" contains
a bug (which we are going to subsequently fix) -- this is contrasted
with libqb's native loop implementation that works just fine even
prior that fix.

Signed-off-by: Jan Pokorný <jpokorny@redhat.com>
2019-06-04 13:07:27 +02:00

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Makefile
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# Copyright (c) 2010 Red Hat, Inc.
#
# Authors: Angus Salkeld <asalkeld@redhat.com>
#
# This file is part of libqb.
#
# libqb is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 2.1 of the License, or
# (at your option) any later version.
#
# libqb 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with libqb. If not, see <http://www.gnu.org/licenses/>.
#
MAINTAINERCLEANFILES = Makefile.in
EXTRA_DIST =
CLEANFILES =
export SOCKETDIR
AM_CPPFLAGS = -I$(top_builddir)/include -I$(top_srcdir)/include
noinst_PROGRAMS = bmc bmcpt bms rbreader rbwriter \
bench-log format_compare_speed loop print_ver \
$(check_PROGRAMS)
noinst_HEADERS = check_common.h
format_compare_speed_SOURCES = format_compare_speed.c $(top_builddir)/include/qb/qbutil.h
format_compare_speed_LDADD = $(top_builddir)/lib/libqb.la
bmc_SOURCES = bmc.c
bmc_LDADD = $(top_builddir)/lib/libqb.la
bmcpt_SOURCES = bmcpt.c
bmcpt_LDADD = $(top_builddir)/lib/libqb.la
bms_SOURCES = bms.c
bms_CFLAGS = $(GLIB_CFLAGS)
bms_LDADD = $(top_builddir)/lib/libqb.la $(GLIB_LIBS)
rbwriter_SOURCES = rbwriter.c
rbwriter_LDADD = $(top_builddir)/lib/libqb.la
rbreader_SOURCES = rbreader.c
rbreader_LDADD = $(top_builddir)/lib/libqb.la
loop_SOURCES = loop.c
loop_LDADD = $(top_builddir)/lib/libqb.la
inc_dir = $(top_srcdir)/include/qb
public_headers = $(sort $(patsubst %.in,%,$(subst $(inc_dir)/,,$(shell \
printf 'include $(inc_dir)/Makefile.am\n\n%%.var:\n\t@echo $$($$*)' \
| MAKEFLAGS= ${MAKE} --no-print-directory -f- inst_HEADERS.var \
|| echo $(inc_dir)/qb*.h*))))
auto_c_files = $(patsubst %.h,auto_check_header_%.c,$(public_headers))
CLEANFILES += $(auto_c_files)
# this works for both non/generated headers thanks to VPATH being
# automatically set to $(top_srcdir)/tests and $(top_builddir)
# being resolved to ".." by automake
# ($(top_srcdir)/tests/../include/qb/%.h = $(top_srcdir)/include/qb/%.h)
auto_check_header_%.c: $(top_builddir)/include/qb/%.h
@name=$$(echo "$<" | sed "s|.*qb/qb||" | sed "s|\.h||") ;\
NAME=$$(echo $$name | tr [:lower:] [:upper:]) ;\
echo "#include <qb/qb$$name.h>" > $@_ ;\
echo "#ifndef QB_$${NAME}_H_DEFINED" >> $@_ ;\
echo "#error no header protector in file qb$$name.h" >> $@_ ;\
echo "#endif" >> $@_ ;\
echo "int main(void) {return 0;}" >> $@_
$(AM_V_GEN)mv $@_ $@
check: check-headers
# rely on implicit automake rule to include right (local) includes
.PHONY: check-headers
check-headers: $(auto_c_files:.c=.o) $(auto_c_files:.c=.opp)
# this is to check basic sanity of using libqb from C++ code, if possible
%.opp: %.c
if HAVE_GXX
$(AM_V_GEN)$(CXX) $(AM_CPPFLAGS) -c $(CPPFLAGS) $(CXXFLAGS) -o $@ $<
else
@echo "C++ compatibility tests not run"
endif
CLEANFILES += ${auto_c_files:.c=.opp}
distclean-local:
rm -rf auto_*.c
rm -rf .deps
if HAVE_DICT_WORDS
if HAVE_SLOW_TESTS
EXTRA_DIST += make-log-test.sh
CLEANFILES += auto_write_logs.c
MAINTAINERCLEANFILES += auto_write_logs.c
nodist_bench_log_SOURCES = auto_write_logs.c
bench_log: auto_write_logs.c
$(builddir)/auto_write_logs.c: make-log-test.sh
@$(srcdir)/make-log-test.sh > $(builddir)/write_logs-tmp.c
$(AM_V_GEN)mv $(builddir)/write_logs-tmp.c $(builddir)/auto_write_logs.c
endif
endif
bench_log_SOURCES = bench-log.c
bench_log_LDADD = $(top_builddir)/lib/libqb.la
if HAVE_CHECK
EXTRA_DIST += start.test resources.test
EXTRA_DIST += blackbox-segfault.sh
TESTS = start.test array.test map.test rb.test list.test log.test blackbox-segfault.sh loop.test ipc.test resources.test
TESTS_ENVIRONMENT = export PATH=.:../tools:$$PATH;
resources.log: rb.log log.log ipc.log
check_LTLIBRARIES =
check_PROGRAMS = array.test ipc.test list.test log.test loop.test \
map.test rb.test util.test \
crash_test_dummy file_change_bytes
dist_check_SCRIPTS = start.test resources.test blackbox-segfault.sh
if HAVE_SLOW_TESTS
TESTS += util.test
check_PROGRAMS += util.test
endif
if INSTALL_TESTS
testsuitedir = $(TESTDIR)
testsuite_PROGRAMS = $(check_PROGRAMS)
testsuite_SCRIPTS = $(dist_check_SCRIPTS) test.conf
endif
file_change_bytes_SOURCES = file_change_bytes.c
crash_test_dummy_SOURCES = crash_test_dummy.c
crash_test_dummy_CFLAGS = @CHECK_CFLAGS@
crash_test_dummy_LDADD = $(top_builddir)/lib/libqb.la @CHECK_LIBS@
array_test_SOURCES = check_array.c
array_test_CFLAGS = @CHECK_CFLAGS@
array_test_LDADD = $(top_builddir)/lib/libqb.la @CHECK_LIBS@
map_test_SOURCES = check_map.c
map_test_CFLAGS = @CHECK_CFLAGS@
map_test_LDADD = $(top_builddir)/lib/libqb.la @CHECK_LIBS@
rb_test_SOURCES = check_rb.c
rb_test_CFLAGS = @CHECK_CFLAGS@
rb_test_LDADD = $(top_builddir)/lib/libqb.la @CHECK_LIBS@
loop_test_SOURCES = check_loop.c
loop_test_CFLAGS = @CHECK_CFLAGS@
loop_test_LDADD = $(top_builddir)/lib/libqb.la @CHECK_LIBS@
ipc_test_SOURCES = check_ipc.c
ipc_test_CFLAGS = @CHECK_CFLAGS@
ipc_test_LDADD = $(top_builddir)/lib/libqb.la @CHECK_LIBS@
if HAVE_FAILURE_INJECTION
ipc_test_LDADD += _failure_injection.la
if HAVE_GLIB
ipc_test_CFLAGS += $(GLIB_CFLAGS)
ipc_test_LDADD += $(GLIB_LIBS)
endif
check_LTLIBRARIES += _failure_injection.la
_failure_injection_la_SOURCES = _failure_injection.c _failure_injection.h
_failure_injection_la_LDFLAGS = -module
_failure_injection_la_LIBADD = $(dlopen_LIBS)
endif
check_LTLIBRARIES += _syslog_override.la
_syslog_override_la_SOURCES = _syslog_override.c _syslog_override.h
_syslog_override_la_LDFLAGS = -module
log_test_SOURCES = check_log.c
log_test_CFLAGS = @CHECK_CFLAGS@
log_test_LDADD = $(top_builddir)/lib/libqb.la @CHECK_LIBS@
log_test_LDADD += _syslog_override.la
util_test_SOURCES = check_util.c
util_test_CFLAGS = @CHECK_CFLAGS@
util_test_LDADD = $(top_builddir)/lib/libqb.la @CHECK_LIBS@
list_test_SOURCES = check_list.c
list_test_CFLAGS = @CHECK_CFLAGS@
list_test_LDADD = $(top_builddir)/lib/libqb.la @CHECK_LIBS@
endif
clean-local:
rm -f *.log
rm -f *.fdata
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