119 lines
4.9 KiB
Ruby
119 lines
4.9 KiB
Ruby
#
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# Copyright (C) 2008-2010 Wayne Meissner
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#
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# This file is part of ruby-ffi.
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#
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright notice, this
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# list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright notice
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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# * Neither the name of the Ruby FFI project nor the names of its contributors
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# may be used to endorse or promote products derived from this software
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# without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.#
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module FFI
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class DynamicLibrary
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SEARCH_PATH = []
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# The following search paths are tried, if the library could not be loaded in the first attempt.
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# They are only executed on Macos in the following order:
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if FFI::Platform.mac?
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# 1. Try library paths possibly defined in LD_LIBRARY_PATH DYLD_LIBRARY_PATH first.
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# This is because dlopen doesn't respect LD_LIBRARY_PATH and DYLD_LIBRARY_PATH is deleted by SIP-protected binaries.
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# See here for details: https://github.com/ffi/ffi/issues/923#issuecomment-1872565313
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%w[LD_LIBRARY_PATH DYLD_LIBRARY_PATH].each do |custom_path|
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SEARCH_PATH.concat ENV.fetch(custom_path,"").split(File::PATH_SEPARATOR)
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end
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# 2. Then on macos/arm64 try /opt/homebrew/lib, since this is a typical standard directory.
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# FFI is often used together with homebrew, so that we hardcode the path for arm64 here.
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if FFI::Platform::ARCH == 'aarch64'
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SEARCH_PATH << '/opt/homebrew/lib'
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end
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# 3. Then try typical system directories starting with the /local/ directory first.
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#
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# /usr/local/lib is used by homebrow on x86_64.
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# /opt/local/lib is used by MacPorts and Fink.
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# /usr/lib is there, because it was always there.
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SEARCH_PATH.concat %w[/opt/local/lib /usr/local/lib /usr/lib]
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end
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# On Linux the library lookup paths are usually defined through /etc/ld.so.conf, which can be changed at will with root permissions.
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# Also LD_LIBRARY_PATH is respected by the dynamic loader, so that there's usually no need and no advantage to do a fallback handling.
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#
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# Windows has it's own library lookup logic, very different to what we do here.
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# See: https://github.com/oneclick/rubyinstaller2/wiki/For-gem-developers#user-content-dll-loading
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FFI.make_shareable(SEARCH_PATH)
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SEARCH_PATH_MESSAGE = "Searched in <system library path>#{ SEARCH_PATH.map{|a| ', ' + a}.join }".freeze
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def self.load_library(name, flags)
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if name == FFI::CURRENT_PROCESS
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FFI::DynamicLibrary.open(nil, RTLD_LAZY | RTLD_LOCAL)
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else
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flags ||= RTLD_LAZY | RTLD_LOCAL
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libnames = (name.is_a?(::Array) ? name : [name])
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libnames = libnames.map(&:to_s).map { |n| [n, FFI.map_library_name(n)].uniq }.flatten.compact
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errors = []
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libnames.each do |libname|
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lib = try_load(libname, flags, errors)
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return lib if lib
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unless libname.start_with?("/")
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SEARCH_PATH.each do |prefix|
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path = "#{prefix}/#{libname}"
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if File.exist?(path)
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lib = try_load(path, flags, errors)
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return lib if lib
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end
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end
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end
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end
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raise LoadError, [*errors, SEARCH_PATH_MESSAGE].join(".\n")
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end
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end
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private_class_method :load_library
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def self.try_load(libname, flags, errors)
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begin
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lib = FFI::DynamicLibrary.open(libname, flags)
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return lib if lib
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# LoadError for C ext & JRuby, RuntimeError for TruffleRuby
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rescue LoadError, RuntimeError => ex
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if ex.message =~ /(([^ \t()])+\.so([^ \t:()])*):([ \t])*(invalid ELF header|file too short|invalid file format)/
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if File.binread($1) =~ /(?:GROUP|INPUT) *\( *([^ \)]+)/
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return try_load($1, flags, errors)
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end
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end
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errors << ex
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nil
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end
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end
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private_class_method :try_load
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end
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end
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