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Diffstat (limited to 'lib/ffi/dynamic_library.rb')
| -rw-r--r-- | lib/ffi/dynamic_library.rb | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/lib/ffi/dynamic_library.rb b/lib/ffi/dynamic_library.rb new file mode 100644 index 0000000..b415033 --- /dev/null +++ b/lib/ffi/dynamic_library.rb @@ -0,0 +1,89 @@ +# +# Copyright (C) 2008-2010 Wayne Meissner +# +# This file is part of ruby-ffi. +# +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions are met: +# +# * Redistributions of source code must retain the above copyright notice, this +# list of conditions and the following disclaimer. +# * Redistributions in binary form must reproduce the above copyright notice +# this list of conditions and the following disclaimer in the documentation +# and/or other materials provided with the distribution. +# * Neither the name of the Ruby FFI project nor the names of its contributors +# may be used to endorse or promote products derived from this software +# without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE +# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR +# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, +# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.# + +module FFI + class DynamicLibrary + SEARCH_PATH = %w[/usr/lib /usr/local/lib /opt/local/lib] + if FFI::Platform::ARCH == 'aarch64' && FFI::Platform.mac? + SEARCH_PATH << '/opt/homebrew/lib' + end + + SEARCH_PATH_MESSAGE = "Searched in <system library path>, #{SEARCH_PATH.join(', ')}".freeze + + def self.load_library(name, flags) + if name == FFI::CURRENT_PROCESS + FFI::DynamicLibrary.open(nil, RTLD_LAZY | RTLD_LOCAL) + else + flags ||= RTLD_LAZY | RTLD_LOCAL + + libnames = (name.is_a?(::Array) ? name : [name]) + libnames = libnames.map(&:to_s).map { |n| [n, FFI.map_library_name(n)].uniq }.flatten.compact + errors = [] + + libnames.each do |libname| + lib = try_load(libname, flags, errors) + return lib if lib + + unless libname.start_with?("/") || FFI::Platform.windows? + SEARCH_PATH.each do |prefix| + path = "#{prefix}/#{libname}" + if File.exist?(path) + lib = try_load(path, flags, errors) + return lib if lib + end + end + end + end + + raise LoadError, [*errors, SEARCH_PATH_MESSAGE].join(".\n") + end + end + private_class_method :load_library + + def self.try_load(libname, flags, errors) + begin + lib = FFI::DynamicLibrary.open(libname, flags) + return lib if lib + + # LoadError for C ext & JRuby, RuntimeError for TruffleRuby + rescue LoadError, RuntimeError => ex + if ex.message =~ /(([^ \t()])+\.so([^ \t:()])*):([ \t])*(invalid ELF header|file too short|invalid file format)/ + if File.binread($1) =~ /(?:GROUP|INPUT) *\( *([^ \)]+)/ + return try_load($1, flags, errors) + end + end + + errors << ex + nil + end + end + private_class_method :try_load + end +end |