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// Copyright Antony Polukhin, 2016-2017.
//
// 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 <boost/config.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
# pragma once
#endif
#include <boost/stacktrace/safe_dump_to.hpp>
#include <unistd.h> // ::write
#include <fcntl.h> // ::open
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
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