mirror of
https://github.com/matrix-construct/construct
synced 2024-08-20 08:34:46 +02:00
950 lines
21 KiB
C++
950 lines
21 KiB
C++
// The Construct
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//
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// Copyright (C) The Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2020 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#include <RB_INC_SIGNAL_H
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#include <RB_INC_MAGICK_API_H
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namespace ircd::magick
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{
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struct display;
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struct transform;
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[[noreturn]] static void handle_exception(const ExceptionType, const char *, const char *);
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static void handle_fatal(const ExceptionType, const char *, const char *) __attribute__((noreturn));
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static void handle_error(const ExceptionType, const char *, const char *) noexcept;
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static void handle_warning(const ExceptionType, const char *, const char *) noexcept;
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static void handle_log(const ExceptionType, const char *) noexcept;
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static void *handle_realloc(void *, size_t) noexcept;
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static void *handle_malloc(size_t) noexcept;
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static void handle_free(void *) noexcept;
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static uint handle_progress(const char *, const int64_t, const uint64_t, ExceptionInfo *) noexcept;
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template<class R, class F, class... A> static R call(F&&, A&&...);
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template<class R, class F, class... A> static R callex(F&&, A&&...);
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template<class F, class... A> static void callpf(F&&, A&&...);
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extern bool call_ready;
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extern ctx::dock call_dock;
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extern ctx::mutex call_mutex;
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extern conf::item<uint64_t> limit_ticks;
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extern conf::item<uint64_t> limit_cycles;
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extern conf::item<uint64_t> yield_threshold;
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extern conf::item<uint64_t> yield_interval;
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extern log::log log;
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}
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struct ircd::magick::display
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{
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display(const ImageInfo &, Image &);
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display(const const_buffer &);
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};
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struct ircd::magick::transform
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{
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using input = std::tuple<const ImageInfo &, const Image *>;
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using output = std::function<void (const const_buffer &)>;
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using transformer = std::function<Image *(const input &)>;
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transform(const const_buffer &, const output &, const transformer &);
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};
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decltype(ircd::magick::log)
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ircd::magick::log
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{
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"magick"
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};
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decltype(ircd::magick::limit_ticks)
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ircd::magick::limit_ticks
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{
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{ "name", "ircd.magick.limit.ticks" },
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{ "default", 10000L },
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};
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decltype(ircd::magick::limit_cycles)
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ircd::magick::limit_cycles
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{
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{ "name", "ircd.magick.limit.cycles" },
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{ "default", 0L },
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};
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decltype(ircd::magick::yield_threshold)
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ircd::magick::yield_threshold
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{
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{ "name", "ircd.magick.yield.threshold" },
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{ "default", 1000L },
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};
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decltype(ircd::magick::yield_interval)
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ircd::magick::yield_interval
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{
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{ "name", "ircd.magick.yield.interval" },
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{ "default", 768L },
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};
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// It is likely that we can't have two contexts enter libmagick
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// simultaneously. This race is possible if the progress callback yields
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// and another context starts an operation. It is highly unlikely the lib
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// can handle reentrancy on the same thread. Hitting thread mutexes within
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// magick will also be catastrophic to ircd::ctx.
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decltype(ircd::magick::call_mutex)
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ircd::magick::call_mutex;
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decltype(ircd::magick::call_dock)
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ircd::magick::call_dock;
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decltype(ircd::magick::call_ready)
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ircd::magick::call_ready;
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decltype(ircd::magick::version_api)
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ircd::magick::version_api
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{
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"magick", info::versions::API, MagickLibVersion, {0}, MagickLibVersionText
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};
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decltype(ircd::magick::version_abi)
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ircd::magick::version_abi
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{
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"magick", info::versions::ABI, 0, {0}, []
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(auto &version, const auto &buf)
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{
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ulong monotonic(0);
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strlcpy(buf, GetMagickVersion(&monotonic));
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version.monotonic = monotonic;
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}
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};
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//
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// Magick library signal handler workarounds.
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//
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// By default the graphicsmagick library installs signal handlers on
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// supporting platforms starting in InitializeMagick() for the duration
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// of the library. These handlers provide no essential functionality,
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// polluting the address space for other libraries and users of our libircd,
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// causing unexpected behavior.
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//
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// Even though the library makes a good faith attempt to not step on already-
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// installed signal handlers: it falls short by not maintaining the full
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// sigaction structure. It loses information for SA_SIGINFO handlers, etc.
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//
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// Our principal workaround involves interposing this function (thankfully
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// exported by the library). Unfortunately this doesn't work in all
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// environments so we retain a full list of signal numbers the libmagick
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// interferes with.
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namespace ircd::magick
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{
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extern const int sig_overrides[];
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extern const size_t sig_overrides_num;
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static void sig_pre(), sig_post();
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}
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/// List of signals from libmagick
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decltype(ircd::magick::sig_overrides)
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ircd::magick::sig_overrides
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{
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#ifdef HAVE_SIGNAL_H
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SIGABRT, SIGBUS, SIGCHLD,
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SIGFPE, SIGHUP, SIGINT,
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SIGQUIT, SIGTERM, SIGSEGV,
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SIGXCPU, SIGXFSZ,
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#endif HAVE_SIGNAL_H
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};
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decltype(ircd::magick::sig_overrides_num)
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ircd::magick::sig_overrides_num
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{
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sizeof(sig_overrides) / sizeof(int)
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};
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#ifdef HAVE_SIGNAL_H
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static struct sigaction
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ircd_magick_sig_vector[ircd::magick::sig_overrides_num];
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#endif
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void
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ircd::magick::sig_pre()
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{
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#ifdef HAVE_SIGNAL_H
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for(size_t i(0); i < sig_overrides_num; ++i)
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syscall(::sigaction, sig_overrides[i], nullptr, ircd_magick_sig_vector + i);
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#endif HAVE_SIGNAL_H
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}
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void
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ircd::magick::sig_post()
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{
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#ifdef HAVE_SIGNAL_H
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for(size_t i(0); i < sig_overrides_num; ++i)
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syscall(::sigaction, sig_overrides[i], ircd_magick_sig_vector + i, nullptr);
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#endif HAVE_SIGNAL_H
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}
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extern "C" void
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InitializeMagickSignalHandlers(void)
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{
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ircd::log::debug
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{
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ircd::magick::log, "Bypassed InitializeMagickSignalHandlers()",
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};
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}
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//
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// init
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//
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ircd::magick::init::init()
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{
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log::info
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{
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log, "Initializing Magick Library version API:%lu [%s] ABI:%lu [%s]",
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long(version_api),
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string_view{version_api},
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long(version_abi),
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string_view{version_abi},
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};
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if(long(version_api) != long(version_abi))
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log::warning
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{
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log, "Magick Library version mismatch headers:%lu library:%lu",
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long(version_api),
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long(version_abi),
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};
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sig_pre();
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InitializeMagick(nullptr);
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MagickAllocFunctions(handle_free, handle_malloc, handle_realloc);
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SetFatalErrorHandler(handle_fatal);
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SetErrorHandler(handle_error);
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SetWarningHandler(handle_warning);
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SetLogMethod(handle_log);
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//SetLogEventMask("all"); // Pollutes stderr :/ can't fix
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SetMonitorHandler(handle_progress);
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SetMagickResourceLimit(ThreadsResource, 1UL);
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sig_post();
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call_ready = true;
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call_dock.notify_all();
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log::debug
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{
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log, "resource settings: pixel max:%lu:%lu height:%lu:%lu width:%lu:%lu; threads:%lu:%lu",
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GetMagickResource(PixelsResource),
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GetMagickResourceLimit(PixelsResource),
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GetMagickResource(HeightResource),
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GetMagickResourceLimit(HeightResource),
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GetMagickResource(WidthResource),
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GetMagickResourceLimit(WidthResource),
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GetMagickResource(ThreadsResource),
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GetMagickResourceLimit(ThreadsResource),
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};
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}
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ircd::magick::init::~init()
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noexcept
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{
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log::debug
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{
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"Shutting down Magick Library..."
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};
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call_ready = false;
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call_dock.wait([]
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{
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return !call_mutex.locked();
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});
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DestroyMagick();
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}
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//
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// thumbcrop
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//
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ircd::magick::thumbcrop::thumbcrop(const const_buffer &in,
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const dimensions &req,
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const result_closure &out)
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{
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crop::offset offset;
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const auto scaler{[&req, &offset]
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(const auto &image)
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{
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const auto &img_p
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{
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std::get<const Image *>(image)
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};
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const auto &img_x(img_p->columns);
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const auto &img_y(img_p->rows);
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const auto &[req_x, req_y] {req};
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const bool aspect
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{
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req_x * img_y < req_y * img_x
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};
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const dimensions scaled
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{
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aspect? req_y * img_x / img_y : req_x,
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aspect? req_y : req_x * img_y / img_x,
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};
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offset =
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{
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aspect? (scaled.first - req_x) / 2.0 : 0,
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aspect? 0 : (scaled.second - req_y) / 2.0,
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};
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return callex<Image *>(ThumbnailImage, img_p, scaled.first, scaled.second);
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}};
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const auto cropper{[&req, &out, &offset]
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(const const_buffer &in)
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{
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crop
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{
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in, req, offset, out
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};
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}};
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transform
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{
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in, cropper, scaler
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};
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}
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//
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// thumbnail
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//
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ircd::magick::thumbnail::thumbnail(const const_buffer &in,
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const dimensions &dim,
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const result_closure &out)
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{
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transform
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{
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in, out, [&dim](const auto &image)
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{
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return callex<Image *>(ThumbnailImage, std::get<const Image *>(image), dim.first, dim.second);
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}
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};
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}
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//
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// scale
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//
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ircd::magick::scale::scale(const const_buffer &in,
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const dimensions &dim,
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const result_closure &out)
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{
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transform
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{
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in, out, [&dim](const auto &image)
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{
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return callex<Image *>(ScaleImage, std::get<const Image *>(image), dim.first, dim.second);
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}
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};
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}
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//
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// shave
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//
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ircd::magick::shave::shave(const const_buffer &in,
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const dimensions &dim,
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const offset &off,
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const result_closure &out)
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{
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const RectangleInfo geometry
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{
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dim.first, // width
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dim.second, // height
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off.first, // x
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off.second, // y
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};
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transform
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{
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in, out, [&geometry](const auto &image)
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{
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return callex<Image *>(ShaveImage, std::get<const Image *>(image), &geometry);
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}
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};
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}
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//
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// crop
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//
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ircd::magick::crop::crop(const const_buffer &in,
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const dimensions &dim,
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const offset &off,
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const result_closure &out)
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{
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const RectangleInfo geometry
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{
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dim.first, // width
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dim.second, // height
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off.first, // x
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off.second, // y
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};
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transform
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{
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in, out, [&geometry](const auto &image)
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{
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return callex<Image *>(CropImage, std::get<const Image *>(image), &geometry);
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}
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};
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}
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//
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// transform (internal)
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//
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ircd::magick::transform::transform(const const_buffer &input,
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const output &output,
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const transformer &transformer)
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{
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const custom_ptr<ImageInfo> input_info
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{
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CloneImageInfo(nullptr),
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DestroyImageInfo
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};
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const custom_ptr<ImageInfo> output_info
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{
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CloneImageInfo(nullptr),
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DestroyImageInfo
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};
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const custom_ptr<Image> input_image
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{
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callex<Image *>(BlobToImage, input_info.get(), data(input), size(input)),
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DestroyImage // pollock
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};
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const custom_ptr<Image> output_image
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{
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transformer({*input_info, input_image.get()}),
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DestroyImage
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};
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size_t output_size(0);
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const auto output_data
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{
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callex<void *>(ImageToBlob, output_info.get(), output_image.get(), &output_size)
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};
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const const_buffer result
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{
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reinterpret_cast<char *>(output_data), output_size
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};
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output(result);
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}
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//
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// display (internal)
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//
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ircd::magick::display::display(const const_buffer &input)
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{
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const custom_ptr<ImageInfo> input_info
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{
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CloneImageInfo(nullptr),
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DestroyImageInfo
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};
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const custom_ptr<Image> input_image
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{
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callex<Image *>(BlobToImage, input_info.get(), data(input), size(input)),
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DestroyImage // pollock
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};
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display
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{
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*input_info, *input_image
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};
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}
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ircd::magick::display::display(const ImageInfo &info,
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Image &image)
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{
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callpf(DisplayImages, &info, &image);
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}
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//
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// util (internal)
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//
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template<class return_t,
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class function,
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class... args>
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return_t
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ircd::magick::callex(function&& f,
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args&&... a)
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{
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if(unlikely(!call_ready))
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throw error
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{
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"Graphics library not ready."
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};
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const std::lock_guard lock
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{
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call_mutex
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};
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ExceptionInfo ei;
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GetExceptionInfo(&ei); // initializer
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const unwind destroy{[&ei]
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{
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DestroyExceptionInfo(&ei);
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}};
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assert(call_ready);
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const auto ret
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{
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f(std::forward<args>(a)..., &ei)
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};
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const auto their_handler
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{
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SetErrorHandler(handle_exception)
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};
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const unwind reset{[&their_handler]
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{
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SetErrorHandler(their_handler);
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}};
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// exception comes out of here; if this is not safe we'll have to
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// convey with a global or inspect ExceptionInfo manually.
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CatchException(&ei);
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return ret;
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}
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template<class function,
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class... args>
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void
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ircd::magick::callpf(function&& f,
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args&&... a)
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{
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if(!call<MagickPassFail>(f, std::forward<args>(a)...))
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throw error{};
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}
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template<class return_t,
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class function,
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class... args>
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return_t
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ircd::magick::call(function&& f,
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args&&... a)
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{
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if(unlikely(!call_ready))
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throw error
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{
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"Graphics library not ready."
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};
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const std::lock_guard lock
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{
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call_mutex
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};
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assert(call_ready);
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return f(std::forward<args>(a)...);
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}
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//
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// ircd::magick::job
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//
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namespace ircd::magick
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{
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static string_view loghead(const job &);
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static void job_init(const string_view &, const int64_t &, const uint64_t &, const uint64_t &);
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static void finished(job &);
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static bool check_yield(job &);
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static void check_cycles(job &);
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}
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struct ircd::magick::job::state
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{
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uint64_t cycles {0};
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uint64_t yield {0};
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char description[1024];
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}
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thread_local ircd::magick::job::state;
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decltype(ircd::magick::job::cur) thread_local
|
|
ircd::magick::job::cur;
|
|
|
|
decltype(ircd::magick::job::tot) thread_local
|
|
ircd::magick::job::tot;
|
|
|
|
uint
|
|
ircd::magick::handle_progress(const char *const text,
|
|
const int64_t tick,
|
|
const uint64_t ticks,
|
|
ExceptionInfo *ei)
|
|
noexcept try
|
|
{
|
|
// Sample the current reference cycle count first and once. This is an
|
|
// accumulated cycle count for only this ircd::ctx and the current slice,
|
|
// (all other cycles are not accumulated here) which is non-zero by now
|
|
// and monotonically increases across jobs as well.
|
|
const auto cycles_sample
|
|
{
|
|
ctx::this_ctx::cycles()
|
|
};
|
|
|
|
// Detect if this is a new job. Tick is usually zero for a new job, but for
|
|
// large jobs it may start after 0. Tick always appears monotonic for a job.
|
|
// The ticks appears constant for a job, though could be the same for different
|
|
// jobs. We don't know of any succinct way to test for a new job, so we use all
|
|
// of the above information.
|
|
const bool new_job
|
|
{
|
|
tick == 0
|
|
|| tick < job::cur.tick
|
|
|| ticks != job::cur.ticks
|
|
};
|
|
|
|
// Assert general assumptions about invocations of this callback.
|
|
assert(new_job || tick >= job::cur.tick);
|
|
assert(new_job || ticks == job::cur.ticks);
|
|
|
|
// Branch after detecting this callback is unrelated to the last job.
|
|
if(new_job)
|
|
{
|
|
finished(job::cur);
|
|
job_init(text, tick, ticks, cycles_sample);
|
|
}
|
|
|
|
// Unconditional bookkeeping updates for this invocation. These statements
|
|
// behave properly regardless of whether this is the same or a new job.
|
|
assert(cycles_sample >= job::state.cycles);
|
|
job::cur.cycles += cycles_sample - job::state.cycles;
|
|
job::state.cycles = cycles_sample;
|
|
job::cur.tick = tick;
|
|
|
|
// This debug message is very noisy, even for debug mode. Developer can
|
|
// enable it at their discretion.
|
|
#ifdef IRCD_MAGICK_DEBUG_PROGRESS
|
|
log::debug
|
|
{
|
|
log, "job:%lu progress %2.2lf%% (%ld/%ld) cycles:%lu :%s",
|
|
job::cur.id,
|
|
(job::cur.tick / double(job::cur.ticks) * 100.0),
|
|
job::cur.tick,
|
|
job::cur.ticks,
|
|
job::cur.cycles,
|
|
job::cur.text,
|
|
};
|
|
#endif
|
|
|
|
check_cycles(job::cur);
|
|
check_yield(job::cur);
|
|
|
|
return true;
|
|
}
|
|
catch(const ctx::interrupted &e)
|
|
{
|
|
++job::cur.intrs;
|
|
job::cur.eptr = std::current_exception();
|
|
ThrowException(ei, MonitorError, "interrupted", e.what());
|
|
ei->signature = MagickSignature; // ???
|
|
return false;
|
|
}
|
|
catch(const ctx::terminated &)
|
|
{
|
|
++job::cur.intrs;
|
|
job::cur.eptr = std::current_exception();
|
|
ThrowException(ei, MonitorError, "terminated", nullptr);
|
|
ei->signature = MagickSignature; // ???
|
|
return false;
|
|
}
|
|
catch(const std::exception &e)
|
|
{
|
|
++job::cur.errors;
|
|
job::cur.eptr = std::current_exception();
|
|
ThrowLoggedException(ei, MonitorError, "error", e.what(), __FILE__, __FUNCTION__, __LINE__);
|
|
ei->signature = MagickSignature; // ???
|
|
return false;
|
|
}
|
|
catch(...)
|
|
{
|
|
++job::cur.errors;
|
|
job::cur.eptr = std::current_exception();
|
|
ThrowLoggedException(ei, MonitorFatalError, "unknown", nullptr, __FILE__, __FUNCTION__, __LINE__);
|
|
ei->signature = MagickSignature; // ???
|
|
return false;
|
|
}
|
|
|
|
void
|
|
ircd::magick::check_cycles(job &job)
|
|
{
|
|
const uint64_t &limit_cycles
|
|
{
|
|
magick::limit_cycles
|
|
};
|
|
|
|
// Check if job exceeded its reference cycle limit if enabled.
|
|
if(unlikely(limit_cycles && job.cycles > limit_cycles))
|
|
throw error
|
|
{
|
|
"job:%lu CPU cycles:%lu exceeded server limit:%lu (progress %2.2lf%% (%ld/%ld))",
|
|
job.id,
|
|
job.cycles,
|
|
limit_cycles,
|
|
(job.tick / double(job.ticks) * 100.0),
|
|
job.tick,
|
|
job.ticks,
|
|
};
|
|
}
|
|
|
|
bool
|
|
ircd::magick::check_yield(job &job)
|
|
{
|
|
const uint64_t &yield_threshold
|
|
{
|
|
magick::yield_threshold
|
|
};
|
|
|
|
// This job is too small to conduct any yields.
|
|
if(likely(job.ticks < yield_threshold))
|
|
return false;
|
|
|
|
const uint64_t &yield_interval
|
|
{
|
|
magick::yield_interval
|
|
};
|
|
|
|
// Haven't reached the yield interval yet.
|
|
if(likely(job.tick - job::state.yield <= yield_interval))
|
|
return false;
|
|
|
|
job::state.yield = job.tick;
|
|
ctx::yield();
|
|
return true;
|
|
}
|
|
|
|
void
|
|
ircd::magick::finished(job &job)
|
|
{
|
|
// Update total state from last job
|
|
assert(job.id == job::tot.id + 1 || (job.id == job::tot.id && !job.id));
|
|
job::tot.id = job.id;
|
|
job::tot.tick += job.tick;
|
|
job::tot.ticks += job.ticks;
|
|
job::tot.cycles += job.cycles;
|
|
job::tot.yields += job.yields;
|
|
job::tot.intrs += job.intrs;
|
|
job::tot.errors += job.errors;
|
|
}
|
|
|
|
void
|
|
ircd::magick::job_init(const string_view &text,
|
|
const int64_t &tick,
|
|
const uint64_t &ticks,
|
|
const uint64_t &cycles_sample)
|
|
{
|
|
// Reset the current job structure
|
|
job::cur =
|
|
{
|
|
job::tot.id + 1, // id
|
|
tick, // tick
|
|
ticks, // ticks
|
|
};
|
|
|
|
// Update internal state
|
|
job::state.cycles = cycles_sample;
|
|
|
|
// The description text may have this annoying empty "[]" on this
|
|
// message so we'll strip that here.
|
|
job::cur.description = strlcpy
|
|
{
|
|
job::state.description, lstrip(text, "[] ")
|
|
};
|
|
|
|
log::debug
|
|
{
|
|
log, "job:%lu started; ticks:%lu :%s",
|
|
job::cur.id,
|
|
job::cur.ticks,
|
|
job::cur.description,
|
|
};
|
|
|
|
// This job is too large based on the ticks measurement. This is an ad hoc
|
|
// measurement of the job size created internally by ImageMagick.
|
|
if(job::cur.ticks > uint64_t(limit_ticks))
|
|
throw error
|
|
{
|
|
"job:%lu computation ticks:%lu exceeds server limit:%lu :%s",
|
|
job::cur.id,
|
|
job::cur.ticks,
|
|
uint64_t(limit_ticks),
|
|
job::cur.description,
|
|
};
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::magick::loghead(const job &job)
|
|
{
|
|
thread_local char buf[256];
|
|
return fmt::sprintf
|
|
{
|
|
buf, "job:%lu %ld/%lu [%s]",
|
|
job.id,
|
|
job.tick,
|
|
job.ticks,
|
|
job.description,
|
|
};
|
|
}
|
|
|
|
//
|
|
// (Internal) patch panels
|
|
//
|
|
|
|
void
|
|
ircd::magick::handle_free(void *const ptr)
|
|
noexcept
|
|
{
|
|
std::free(ptr);
|
|
}
|
|
|
|
void *
|
|
ircd::magick::handle_malloc(size_t size)
|
|
noexcept
|
|
{
|
|
return std::malloc(size);
|
|
}
|
|
|
|
void *
|
|
ircd::magick::handle_realloc(void *const ptr,
|
|
size_t size)
|
|
noexcept
|
|
{
|
|
return std::realloc(ptr, size);
|
|
}
|
|
|
|
void
|
|
ircd::magick::handle_log(const ExceptionType type,
|
|
const char *const message)
|
|
noexcept
|
|
{
|
|
log::debug
|
|
{
|
|
log, "%s (%d) %s :%s",
|
|
loghead(job::cur),
|
|
int(type),
|
|
GetLocaleExceptionMessage(type, ""),
|
|
message,
|
|
};
|
|
}
|
|
|
|
void
|
|
ircd::magick::handle_warning(const ExceptionType type,
|
|
const char *const reason,
|
|
const char *const description)
|
|
noexcept
|
|
{
|
|
log::warning
|
|
{
|
|
log, "%s (#%d) %s :%s :%s",
|
|
loghead(job::cur),
|
|
int(type),
|
|
GetLocaleExceptionMessage(type, ""),
|
|
reason,
|
|
description,
|
|
};
|
|
}
|
|
|
|
void
|
|
ircd::magick::handle_error(const ExceptionType type,
|
|
const char *const reason,
|
|
const char *const description)
|
|
noexcept
|
|
{
|
|
log::error
|
|
{
|
|
log, "%s (#%d) %s :%s :%s",
|
|
loghead(job::cur),
|
|
int(type),
|
|
GetLocaleExceptionMessage(type, ""),
|
|
reason,
|
|
description,
|
|
};
|
|
}
|
|
|
|
void
|
|
ircd::magick::handle_fatal(const ExceptionType type,
|
|
const char *const reason,
|
|
const char *const description)
|
|
{
|
|
log::critical
|
|
{
|
|
log, "%s (#%d) %s :%s :%s",
|
|
loghead(job::cur),
|
|
int(type),
|
|
GetLocaleExceptionMessage(type, ""),
|
|
reason,
|
|
description,
|
|
};
|
|
|
|
ircd::terminate();
|
|
__builtin_unreachable();
|
|
}
|
|
|
|
void
|
|
ircd::magick::handle_exception(const ExceptionType type,
|
|
const char *const reason,
|
|
const char *const description)
|
|
{
|
|
const auto &message
|
|
{
|
|
GetLocaleExceptionMessage(type, "")?: "???"
|
|
};
|
|
|
|
thread_local char buf[exception::BUFSIZE];
|
|
const string_view what{fmt::sprintf
|
|
{
|
|
buf, "(#%d) %s :%s :%s",
|
|
int(type),
|
|
message,
|
|
reason,
|
|
description,
|
|
}};
|
|
|
|
log::derror
|
|
{
|
|
log, "%s %s",
|
|
loghead(job::cur),
|
|
what,
|
|
};
|
|
|
|
if(reason == "terminated"_sv)
|
|
throw ctx::terminated{};
|
|
|
|
if(reason == "interrupted"_sv)
|
|
throw ctx::interrupted
|
|
{
|
|
"%s", what
|
|
};
|
|
|
|
throw error
|
|
{
|
|
"%s", what
|
|
};
|
|
}
|