mirror of https://github.com/google/oss-fuzz.git
52 lines
1.8 KiB
Ruby
52 lines
1.8 KiB
Ruby
# Copyright 2022 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# Ruby gems are shared objects that need to be dynamically loaded.
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# OSS-Fuzz requires all the binary files to be copied to the /out
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# directory, so static linking is usually recommended. Unfortunately,
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# static linking prevents the dynamic loading of gems from
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# working. So, instead, we need to build ruby with the
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# --enabled-shared flag and copy all the relevant shared objects to
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# the /out directory. We also need to invoke the fuzzer binary with
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# the RUBYLIB environment variable set, so that the ruby interpreter
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# is able to find those files. This script generates a C function
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# named init_ruby_load_paths() which is used to set the RUBYLIB
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# environment variable at runtime.
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old_lib_dir = ENV["RUBY_LIB_DIR"]
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n = $LOAD_PATH.length
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puts "#include <stdio.h>"
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puts ""
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puts "static int init_ruby_load_paths(char *buf, size_t bufsize, const char *outpath) {"
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puts " return snprintf(buf, bufsize,"
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i = 0
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while i < n do
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path = $LOAD_PATH[i]
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if path.start_with?(old_lib_dir)
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puts " \"%s/lib" + path.delete_prefix(old_lib_dir) + (i+1 < n ? ":\"" : "\",")
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else
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puts "#error path has incorrect prefix: " + path
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end
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i += 1
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end
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i = 0
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while i < n do
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puts " outpath" + (i+1 < n ? "," : "")
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i += 1
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end
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puts " );"
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puts "}"
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