December 2017 - Boost-users - lists.preview.boost.org

[interprocess] Determine size of managed_shared_memory
by Kai Benndorf 12 Oct '19

12 Oct '19

Hi all, I want to create a managed_shared_memory in exactly the size I needed. Therefore I do something like this: size = sizeof( common_managed_shared_memory ); size += sizeof( MyClassInSharedMem ); managed_shared_memory segment(create_only, "name", size ); MyClassInSharedMem allocates itself some memory by segment->allocate(). I added this also to the size, but get a boost::interprocess::bad_alloc exception on allocating this additional memory. Are there some magic bytes I forgot to add? Many thanks in advance Kai

3 2

boost::filtered_graph filtering on vertex color... if I only had a colormap
by Brian Davis 19 Jul '19

19 Jul '19

Lets say I have a graph g (of type graph_t) and a color map (boy I wish I had a colormap): typedef boost::property_map<graph_t, boost::vertex_color_t>::type color_map_t; or is it? auto indexmap = boost::get(boost::vertex_index, g); auto colors = boost::make_vector_property_map<boost::default_color_type>(indexmap); or maybe? auto indexmap = boost::get(boost::vertex_index, g); auto colors = boost::make_vector_property_map<boost::vertex_color_t>(indexmap); or possibly some goop found on the internet? boost::make_iterator_property_map(color_map.begin(), boost::get(boost::vertex_index, data_->g), color_map[0]) or other internet goop? typedef boost::property_map<GraphType, boost::vertex_color_t>::type color_map_t; color_map_t colorMap; boost::color_map(colorMap)) or other internet goop?? std::vector<int> colorMap(num_vertices(g), boost::white_color); so confused... (certainly not surprised why bgl is not a part of stl) Can someone help explain the various types and ways of specifying colormaps and the logic for each way and means? and a function (if I could get that far without VS syntax highlighter going bonkers and gobs of compiler errors.. you know the type): make_pretty(g, colormap ) which colors the graph colormap and a filter struct for boost::filtered_graph<Graph, EdgePredicate, VertexPredicate> (where I wonder why if I only want to filter vertices I have to set boost::keep_all for EdgePredicate... sigh... I know the answer... and also know how long it found me to find/figure out boost::keep_all - and if you are looking for boost::keep_all and found it here... your welcome ;-) ) and modifying (probably incorrectly) boost::filtered_graph example to: template <typename ColorMap> struct vertex_color_filter_eq { vertex_color_filter_eq() { } vertex_color_filter_eq(ColorMap colormap/*, boost::default_color_type c*/) : m_colormap(colormap)/*, m_c(c)*/ { } template <typename Vertex> bool operator()(const Vertex& v) const { return 0 < get(m_colormap, v); //return c < get(m_colormap, v); } ColorMap m_colormap; //boost::default_color_type m_c; }; auto indexmap = boost::get(boost::vertex_index, g); auto colors = boost::make_vector_property_map<boost::default_color_type>(indexmap); // some where here I would call make_pretty(g, colors) typedef property_map<graph_t, boost::vertex_color_t>::type ColorMap_t; vertex_color_filter<ColorMap_t> filter(colors); // boost::filtered_graph<graph_t, boost::keep_all, VertexPredicate> boost::filtered_graph<graph_t, boost::keep_all, vertex_color_filter> fg(g, filter); // Later say if I could get it compile and better if it compiled and worked I could move on and auto color = boost::red_color; typedef property_map<graph_t, boost::vertex_color_t>::type ColorMap_t; vertex_color_filter<ColorMap_t> filter(colors, color); boost::filtered_graph<graph_t, boost::keep_all, vertex_color_filter> fg(g, filter); Maybe if I color them yellow, I can then reach the wizard pull back the curtain and ask how to create a color map... If I only had a color map.

4 6

[test] Use-after-free with --log_sink=file, reported by gcc 7.2
by Avi Kivity 23 Jan '18

23 Jan '18

When static destructors are called, as the program exits, we destroy boost::unit_test::(anonymous namespace)::s_log_impl()::the_inst. This has a member vector, m_log_formatter_data. When destroying the second member, we run an ios_base_all_saver destructor, which attempts to restore a stream's format, however that stream has already been deallocated. Maybe that stream is in another static destructor, which was not ordered wrt. this one? Or maybe it was destroyed even earlier, when unit_test_main() exited. From ASan log, it loofs like the former. One static destructor is run from /usr/include/boost/test/impl/framework.ipp:459, while the other is run from /unit_test_log.ipp:122, so there is no ordering abong them. *** No errors detected ================================================================= ==1745==ERROR: AddressSanitizer: heap-use-after-free on address 0x6160000016a8 at pc 0x0000015f8892 bp 0x7ffecdb0b720 sp 0x7ffecdb0b710 READ of size 8 at 0x6160000016a8 thread T0 #0 0x15f8891 in std::ios_base::width(long) /usr/include/c++/7/bits/ios_base.h:723 #1 0x161dea0 in boost::io::ios_base_all_saver::restore() /usr/include/boost/io/ios_state.hpp:340 #2 0x161dda6 in boost::io::ios_base_all_saver::~ios_base_all_saver() /usr/include/boost/io/ios_state.hpp:336 #3 0x168a22e in void boost::checked_delete<boost::io::ios_base_all_saver>(boost::io::ios_base_all_saver*) /usr/include/boost/core/checked_delete.hpp:34 #4 0x171b7c5 in boost::detail::sp_counted_impl_p<boost::io::ios_base_all_saver>::dispose() /usr/include/boost/smart_ptr/detail/sp_counted_impl.hpp:78 #5 0x58b2c4 in boost::detail::sp_counted_base::release() /usr/include/boost/smart_ptr/detail/sp_counted_base_std_atomic.hpp:109 #6 0x58b51e in boost::detail::shared_count::~shared_count() /usr/include/boost/smart_ptr/detail/shared_count.hpp:419 #7 0x161eadc in boost::shared_ptr<boost::io::ios_base_all_saver>::~shared_ptr() /usr/include/boost/smart_ptr/shared_ptr.hpp:337 #8 0x1589a8a in ~unit_test_log_data_helper_impl /usr/include/boost/test/impl/unit_test_log.ipp:87 #9 0x15f0891 in _Destroy<boost::unit_test::(anonymous namespace)::unit_test_log_data_helper_impl> /usr/include/c++/7/bits/stl_construct.h:98 #10 0x15eb8ad in __destroy<boost::unit_test::(anonymous namespace)::unit_test_log_data_helper_impl*> /usr/include/c++/7/bits/stl_construct.h:108 #11 0x15e32c7 in _Destroy<boost::unit_test::(anonymous namespace)::unit_test_log_data_helper_impl*> /usr/include/c++/7/bits/stl_construct.h:137 #12 0x15cd317 in _Destroy<boost::unit_test::(anonymous namespace)::unit_test_log_data_helper_impl*, boost::unit_test::(anonymous namespace)::unit_test_log_data_helper_impl> /usr/include/c++/7/bits/stl_construct.h:206 #13 0x15c0de2 in ~vector /usr/include/c++/7/bits/stl_vector.h:434 #14 0x158aa72 in ~unit_test_log_impl /usr/include/boost/test/impl/unit_test_log.ipp:122 #15 0x7f6c2db90b57 in __run_exit_handlers (/lib64/libc.so.6+0x3bb57) #16 0x7f6c2db90ba9 in exit (/lib64/libc.so.6+0x3bba9) #17 0x7f6c2db76010 in __libc_start_main (/lib64/libc.so.6+0x21010) #18 0x4172e9 in _start (/home/avi/seastar/build/debug/tests/memcached/test_ascii_parser_g+0x4172e9) 0x6160000016a8 is located 296 bytes inside of 544-byte region [0x616000001580,0x6160000017a0) freed by thread T0 here: #0 0x7f6c32c9d6d8 in operator delete(void*, unsigned long) (/lib64/libasan.so.4+0xe16d8) #1 0x1717f1e in boost::detail::sp_counted_impl_pd<std::basic_ofstream<char, std::char_traits<char> >*, boost::detail::sp_ms_deleter<std::basic_ofstream<char, std::char_traits<char> > > >::~sp_counted_impl_pd() /usr/include/boost/smart_ptr/detail/sp_counted_impl.hpp:127 #2 0xc1563b in boost::detail::sp_counted_base::destroy() /usr/include/boost/smart_ptr/detail/sp_counted_base_std_atomic.hpp:89 #3 0x58b3e4 in boost::detail::sp_counted_base::weak_release() /usr/include/boost/smart_ptr/detail/sp_counted_base_std_atomic.hpp:123 #4 0x58b2f3 in boost::detail::sp_counted_base::release() /usr/include/boost/smart_ptr/detail/sp_counted_base_std_atomic.hpp:110 #5 0x58b51e in boost::detail::shared_count::~shared_count() /usr/include/boost/smart_ptr/detail/shared_count.hpp:419 #6 0x15fe350 in boost::shared_ptr<std::basic_ofstream<char, std::char_traits<char> > >::~shared_ptr() /usr/include/boost/smart_ptr/shared_ptr.hpp:337 #7 0x160f9ec in boost::unit_test::runtime_config::stream_holder::~stream_holder() /usr/include/boost/test/unit_test_parameters.hpp:96 #8 0x16fb8fc in std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder>::~pair() /usr/include/c++/7/bits/stl_pair.h:198 #9 0x16fb964 in void __gnu_cxx::new_allocator<std::_Rb_tree_node<std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder> > >::destroy<std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder> >(std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder>*) /usr/include/c++/7/ext/new_allocator.h:140 #10 0x16ef009 in void std::allocator_traits<std::allocator<std::_Rb_tree_node<std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder> > > >::destroy<std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder> >(std::allocator<std::_Rb_tree_node<std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder> > >&, std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder>*) /usr/include/c++/7/bits/alloc_traits.h:487 #11 0x16d81bc in std::_Rb_tree<boost::unit_test::output_format, std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder>, std::_Select1st<std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder> >, std::less<boost::unit_test::output_format>, std::allocator<std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder> > >::_M_destroy_node(std::_Rb_tree_node<std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder> >*) /usr/include/c++/7/bits/stl_tree.h:650 #12 0x16adac7 in std::_Rb_tree<boost::unit_test::output_format, std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder>, std::_Select1st<std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder> >, std::less<boost::unit_test::output_format>, std::allocator<std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder> > >::_M_drop_node(std::_Rb_tree_node<std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder> >*) /usr/include/c++/7/bits/stl_tree.h:658 #13 0x167e5af in std::_Rb_tree<boost::unit_test::output_format, std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder>, std::_Select1st<std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder> >, std::less<boost::unit_test::output_format>, std::allocator<std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder> > >::_M_erase(std::_Rb_tree_node<std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder> >*) /usr/include/c++/7/bits/stl_tree.h:1858 #14 0x1649760 in std::_Rb_tree<boost::unit_test::output_format, std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder>, std::_Select1st<std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder> >, std::less<boost::unit_test::output_format>, std::allocator<std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder> > >::~_Rb_tree() /usr/include/c++/7/bits/stl_tree.h:949 #15 0x160f988 in std::map<boost::unit_test::output_format, boost::unit_test::runtime_config::stream_holder, std::less<boost::unit_test::output_format>, std::allocator<std::pair<boost::unit_test::output_format const, boost::unit_test::runtime_config::stream_holder> > >::~map() /usr/include/c++/7/bits/stl_map.h:294 #16 0x161009b in boost::unit_test::framework::state::~state() /usr/include/boost/test/impl/framework.ipp:459 #17 0x7f6c2db90b57 in __run_exit_handlers (/lib64/libc.so.6+0x3bb57) previously allocated by thread T0 here: #0 0x7f6c32c9c158 in operator new(unsigned long) (/lib64/libasan.so.4+0xe0158) #1 0x169dfd6 in boost::detail::shared_count::shared_count<std::basic_ofstream<char, std::char_traits<char> >*, boost::detail::sp_ms_deleter<std::basic_ofstream<char, std::char_traits<char> > > >(std::basic_ofstream<char, std::char_traits<char> >*, boost::detail::sp_inplace_tag<boost::detail::sp_ms_deleter<std::basic_ofstream<char, std::char_traits<char> > > >) /usr/include/boost/smart_ptr/detail/shared_count.hpp:206 #2 0x16728db in boost::shared_ptr<std::basic_ofstream<char, std::char_traits<char> > >::shared_ptr<std::basic_ofstream<char, std::char_traits<char> >, boost::detail::sp_inplace_tag<boost::detail::sp_ms_deleter<std::basic_ofstream<char, std::char_traits<char> > > > >(std::basic_ofstream<char, std::char_traits<char> >*, boost::detail::sp_inplace_tag<boost::detail::sp_ms_deleter<std::basic_ofstream<char, std::char_traits<char> > > >) /usr/include/boost/smart_ptr/shared_ptr.hpp:372 #3 0x163c6e6 in boost::detail::sp_if_not_array<std::basic_ofstream<char, std::char_traits<char> > >::type boost::make_shared<std::basic_ofstream<char, std::char_traits<char> >>() /usr/include/boost/smart_ptr/make_shared_object.hpp:250 #4 0x15fe6ad in boost::unit_test::runtime_config::stream_holder::setup(boost::unit_test::basic_cstring<char const> const&) /usr/include/boost/test/unit_test_parameters.hpp:114 #5 0x155cd45 in boost::unit_test::framework::impl::setup_loggers() /usr/include/boost/test/impl/framework.ipp:861 #6 0x1561113 in boost::unit_test::framework::init(bool (*)(), int, char**) /usr/include/boost/test/impl/framework.ipp:1033 #7 0x1599d40 in boost::unit_test::unit_test_main(bool (*)(), int, char**) /usr/include/boost/test/impl/unit_test_main.ipp:189 #8 0x15c067f in main tests/test-utils.cc:84 #9 0x7f6c2db76009 in __libc_start_main (/lib64/libc.so.6+0x21009) SUMMARY: AddressSanitizer: heap-use-after-free /usr/include/c++/7/bits/ios_base.h:723 in std::ios_base::width(long) Shadow bytes around the buggy address: 0x0c2c7fff8280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c2c7fff8290: 00 00 00 00 06 fa fa fa fa fa fa fa fa fa fa fa 0x0c2c7fff82a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c2c7fff82b0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c2c7fff82c0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd =>0x0c2c7fff82d0: fd fd fd fd fd[fd]fd fd fd fd fd fd fd fd fd fd 0x0c2c7fff82e0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c2c7fff82f0: fd fd fd fd fa fa fa fa fa fa fa fa fa fa fa fa 0x0c2c7fff8300: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c2c7fff8310: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c2c7fff8320: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb ==1745==ABORTING

2 5

Boost.Test: floating point comparison using absolute diference
by Georgios Sermaidis 30 Dec '17

30 Dec '17

Hi all, I am trying to find a way to make the boost unit test framework use an absolute difference for floating point comparison instead of the relative difference. I searched the documentation to try to find a suitable decorator but couldn’t find anything. Any help is much appreciated! #define BOOST_TEST_MODULE example #include <boost/test/included/unit_test.hpp> // boost::unit_test::tolerance uses relative difference and hence this test will pass; // is there anything I can use here to indicate absolute difference? BOOST_AUTO_TEST_CASE(my_test, * boost::unit_test::tolerance(0.1) ) { BOOST_TEST(10.1 == 10.3); }

2 4

Boost Unit Test: How to run only the enabled tests of a test suite?
by Maarten Anonymous 28 Dec '17

28 Dec '17

Hey, I'm looking for a way to only run the enabled unit tests of a tests suite. I have the following test suite: #define BOOST_TEST_MODULE decorator_predicate#include <boost/test/included/unit_test.hpp>namespace utf = boost::unit_test; BOOST_AUTO_TEST_SUITE(test_suite_1) BOOST_AUTO_TEST_CASE(bare_test){ BOOST_TEST(true);} BOOST_AUTO_TEST_CASE(enabled_test, * utf::enabled()){ BOOST_TEST(true);} BOOST_AUTO_TEST_CASE(disabled_test, * utf::disabled()){ BOOST_TEST(false);} BOOST_AUTO_TEST_SUITE_END() BOOST_AUTO_TEST_SUITE(test_suite_2) BOOST_AUTO_TEST_CASE(bare_test){ BOOST_TEST(true);} BOOST_AUTO_TEST_CASE(enabled_test, * utf::enabled()){ BOOST_TEST(true);} BOOST_AUTO_TEST_CASE(disabled_test, * utf::disabled()){ BOOST_TEST(false);} BOOST_AUTO_TEST_SUITE_END() Compilation and running: # Compile the test g++ predicate.cpp -o predicate # List all tests./predicate --list_content test_suite_1* bare_test* enabled_test* disabled_test test_suite_2* bare_test* enabled_test* disabled_test # Run the tests that are enabled by default./predicateRunning 4 test cases... *** No errors detected # Here, I would like to only run the enabled tests of test_suite_1.# Instead, all tests are run. Including the disabled../predicate -t test_suite_1Running 3 test cases... predicate.cpp(21): error: in "test_suite_1/disabled_test": check false has failed *** 1 failure is detected in the test module "decorator_predicate" How can I only run the enabled tests of tst_suite1? Only bare_test and enabled_test should be run. Thanks!

2 1

[test] Set fixture for all tests
by Florian Lindner 28 Dec '17

28 Dec '17

Hello, can I set a fixture for the entire test tree, so that it is called before and after each test case? BOOST_FIXTURE_TEST_CASE does that for a test suite, but how can I apply it to all tests e.g. the master test suite? Thanks, Florian

2 1

shared mutex ( read -write lock) for fibers
by Cristian Lorenzetto 23 Dec '17

23 Dec '17

is there a read-write lock for fibers? fibers mutex works also in a "normal" Thread when the scheduler is not installed?

1 0

[Units] Name a unit for output
by Santiago Ospina 20 Dec '17

20 Dec '17

Hello boost-users, I would like to know if there is an equivalent for giving a name and a symbol given a unit in boost::units (maybe scaled from another one). I know the example of naming base units, however, it would imply I'd have to create a system and a conversion for every unit I want to implement. I tried to write it directly from the scaled version, like this: template<> struct scale_minute<60, static_rational<1> > { static const long base = 60; typedef Detail::static_rational<1> exponent; typedef double value_type; static value_type value() { return(60); } static std::string name() { return("minute"); } static std::string symbol() { return("m"); } }; however, it is adding my scaled name plus my base name (say the base name is “s” which stands for seconds, then it would print “m” + "s”). Any idea how to overcome with that?

2 2

Re: [Boost-users] boost.msm and boost.mp11
by Didi JP BGF 19 Dec '17

19 Dec '17

Hi, there is this library that I use ... https://github.com/boost-experimental/sml ... Though I do not what the boost status is... On Tue, Dec 19, 2017 at 4:27 PM, Bogdan via Boost-users < boost-users(a)lists.boost.org> wrote: > Now that boost 1.66 includes mp11, is there a plan to upgrade the > meta-state > machine library (boost.msm) to something less macro dependent? > Thank you, > Bogdan > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > https://lists.boost.org/mailman/listinfo.cgi/boost-users > -- Didi JP BGF 15 Rue Albert Roussel 75017 Paris skype : bdidierjp

1 0

[release] Boost 1.66.0
by Daniel James 19 Dec '17

19 Dec '17

Release 1.66.0 of the Boost C++ Libraries is now available. These open-source libraries work well with the C++ Standard Library, and are usable across a broad spectrum of applications. The Boost license encourages both commercial and non-commercial use. This release contains N new libraries and numerous enhancements and bug fixes for existing libraries. For details, including download links, see <http://www.boost.org/users/news/version_1.66.0> You can also download directly from: <https://dl.bintray.com/boostorg/release/1.66.0/> To install this release on your system, see <http://www.boost.org/doc/libs/release/more/getting_started/index.html> Thanks to everyone who participated in this release. Thanks, -- The Boost Release Team Vladimir Prus, Marshall Clow, Eric Niebler, Daniel James, Beman Dawes

2 1