60 lines
1.8 KiB
C++
60 lines
1.8 KiB
C++
// Copyright Antony Polukhin, 2016-2022.
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_STACKTRACE_DETAIL_SAFE_DUMP_POSIX_IPP
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#define BOOST_STACKTRACE_DETAIL_SAFE_DUMP_POSIX_IPP
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#include <boost/config.hpp>
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#ifdef BOOST_HAS_PRAGMA_ONCE
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# pragma once
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#endif
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#include <boost/stacktrace/safe_dump_to.hpp>
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#include <unistd.h> // ::write
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#include <fcntl.h> // ::open
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#include <sys/stat.h> // S_IWUSR and friends
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namespace boost { namespace stacktrace { namespace detail {
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std::size_t dump(int fd, const native_frame_ptr_t* frames, std::size_t frames_count) BOOST_NOEXCEPT {
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// We do not retry, because this function must be typically called from signal handler so it's:
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// * to scary to continue in case of EINTR
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// * EAGAIN or EWOULDBLOCK may occur only in case of O_NONBLOCK is set for fd,
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// so it seems that user does not want to block
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if (::write(fd, frames, sizeof(native_frame_ptr_t) * frames_count) == -1) {
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return 0;
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}
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return frames_count;
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}
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std::size_t dump(const char* file, const native_frame_ptr_t* frames, std::size_t frames_count) BOOST_NOEXCEPT {
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const int fd = ::open(
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file,
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O_CREAT | O_WRONLY | O_TRUNC,
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#if defined(S_IWUSR) && defined(S_IRUSR) // Workarounds for some Android OSes
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S_IWUSR | S_IRUSR
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#elif defined(S_IWRITE) && defined(S_IREAD)
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S_IWRITE | S_IREAD
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#else
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0
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#endif
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);
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if (fd == -1) {
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return 0;
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}
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const std::size_t size = boost::stacktrace::detail::dump(fd, frames, frames_count);
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::close(fd);
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return size;
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}
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}}} // namespace boost::stacktrace::detail
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#endif // BOOST_STACKTRACE_DETAIL_SAFE_DUMP_POSIX_IPP
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