// Copyright Antony Polukhin, 2016-2019. // // Distributed under the Boost Software License, Version 1.0. (See // accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) #ifndef BOOST_STACKTRACE_DETAIL_SAFE_DUMP_POSIX_IPP #define BOOST_STACKTRACE_DETAIL_SAFE_DUMP_POSIX_IPP #include #ifdef BOOST_HAS_PRAGMA_ONCE # pragma once #endif #include #include // ::write #include // ::open #include // S_IWUSR and friends namespace boost { namespace stacktrace { namespace detail { std::size_t dump(int fd, const native_frame_ptr_t* frames, std::size_t frames_count) BOOST_NOEXCEPT { // We do not retry, because this function must be typically called from signal handler so it's: // * to scary to continue in case of EINTR // * EAGAIN or EWOULDBLOCK may occur only in case of O_NONBLOCK is set for fd, // so it seems that user does not want to block if (::write(fd, frames, sizeof(native_frame_ptr_t) * frames_count) == -1) { return 0; } return frames_count; } std::size_t dump(const char* file, const native_frame_ptr_t* frames, std::size_t frames_count) BOOST_NOEXCEPT { const int fd = ::open( file, O_CREAT | O_WRONLY | O_TRUNC, #if defined(S_IWUSR) && defined(S_IRUSR) // Workarounds for some Android OSes S_IWUSR | S_IRUSR #elif defined(S_IWRITE) && defined(S_IREAD) S_IWRITE | S_IREAD #else 0 #endif ); if (fd == -1) { return 0; } const std::size_t size = boost::stacktrace::detail::dump(fd, frames, frames_count); ::close(fd); return size; } }}} // namespace boost::stacktrace::detail #endif // BOOST_STACKTRACE_DETAIL_SAFE_DUMP_POSIX_IPP