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92f5a8d4 | 1 | // Copyright Antony Polukhin, 2016-2019. |
b32b8144 FG |
2 | // |
3 | // Distributed under the Boost Software License, Version 1.0. (See | |
4 | // accompanying file LICENSE_1_0.txt or copy at | |
5 | // http://www.boost.org/LICENSE_1_0.txt) | |
6 | ||
7 | #ifndef BOOST_STACKTRACE_DETAIL_SAFE_DUMP_POSIX_IPP | |
8 | #define BOOST_STACKTRACE_DETAIL_SAFE_DUMP_POSIX_IPP | |
9 | ||
10 | #include <boost/config.hpp> | |
11 | #ifdef BOOST_HAS_PRAGMA_ONCE | |
12 | # pragma once | |
13 | #endif | |
14 | ||
15 | #include <boost/stacktrace/safe_dump_to.hpp> | |
16 | ||
17 | #include <unistd.h> // ::write | |
18 | #include <fcntl.h> // ::open | |
19 | #include <sys/stat.h> // S_IWUSR and friends | |
20 | ||
21 | ||
22 | namespace boost { namespace stacktrace { namespace detail { | |
23 | ||
24 | std::size_t dump(int fd, const native_frame_ptr_t* frames, std::size_t frames_count) BOOST_NOEXCEPT { | |
25 | // We do not retry, because this function must be typically called from signal handler so it's: | |
26 | // * to scary to continue in case of EINTR | |
27 | // * EAGAIN or EWOULDBLOCK may occur only in case of O_NONBLOCK is set for fd, | |
28 | // so it seems that user does not want to block | |
29 | if (::write(fd, frames, sizeof(native_frame_ptr_t) * frames_count) == -1) { | |
30 | return 0; | |
31 | } | |
32 | ||
33 | return frames_count; | |
34 | } | |
35 | ||
36 | std::size_t dump(const char* file, const native_frame_ptr_t* frames, std::size_t frames_count) BOOST_NOEXCEPT { | |
37 | const int fd = ::open( | |
38 | file, | |
39 | O_CREAT | O_WRONLY | O_TRUNC, | |
40 | #if defined(S_IWUSR) && defined(S_IRUSR) // Workarounds for some Android OSes | |
41 | S_IWUSR | S_IRUSR | |
42 | #elif defined(S_IWRITE) && defined(S_IREAD) | |
43 | S_IWRITE | S_IREAD | |
44 | #else | |
45 | 0 | |
46 | #endif | |
47 | ); | |
48 | if (fd == -1) { | |
49 | return 0; | |
50 | } | |
51 | ||
52 | const std::size_t size = boost::stacktrace::detail::dump(fd, frames, frames_count); | |
53 | ::close(fd); | |
54 | return size; | |
55 | } | |
56 | ||
57 | }}} // namespace boost::stacktrace::detail | |
58 | ||
59 | #endif // BOOST_STACKTRACE_DETAIL_SAFE_DUMP_POSIX_IPP |