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-rw-r--r--lib/ffi/dynamic_library.rb89
1 files changed, 89 insertions, 0 deletions
diff --git a/lib/ffi/dynamic_library.rb b/lib/ffi/dynamic_library.rb
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+#
+# 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