2018-11-09 23:10:24 +00:00
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#!/bin/bash -eu
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# Copyright 2018 Google Inc.
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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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#
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################################################################################
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# build fuzzers
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git: workaround new requirement to use common-main (#7818)
Due to upstream changes, the Git fuzzers must now link against
common-main.o; however, this breaks the build in two ways:
1) Linking with common-main.o causes main() to have multiple
definitions, one in common-main.o and one from the fuzzing engine.
2) To avoid #1, the Git Makefile specifically excludes common-main.o
from the fuzzer build rule.
To work around these issues, we can override FUZZ_CXXFLAGS (add
"-Wl,--allow-multiple-definition" to fix #1) and LIB_FUZZING_ENGINE (add
"common-main.o" to fix #2).
Once we can get a Makefile fix into Git's upstream, we can remove the
override for LIB_FUZZING_ENGINE.
However, this change causes `check_build` to fail for honggfuzz, and we
have not yet been able to diagnose the reason. So for now, we also need
to limit our engines to afl and libfuzzer.
2022-07-16 23:46:23 +00:00
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make -j$(nproc) CC=$CC CXX=$CXX CFLAGS="$CFLAGS" \
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FUZZ_CXXFLAGS="$CXXFLAGS -Wl,--allow-multiple-definition" \
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LIB_FUZZING_ENGINE="common-main.o $LIB_FUZZING_ENGINE" fuzz-all
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2018-11-09 23:10:24 +00:00
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2019-02-19 14:27:26 +00:00
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FUZZERS="fuzz-pack-headers fuzz-pack-idx fuzz-commit-graph"
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2022-10-01 19:38:58 +00:00
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#FUZZERS="$FUZZERS fuzz-cmd-status fuzz-cmd-diff fuzz-cmd-version"
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#FUZZERS="$FUZZERS fuzz-command"
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2022-10-03 20:39:39 +00:00
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FUZZERS="$FUZZERS fuzz-cmd-diff"
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2018-11-09 23:10:24 +00:00
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# copy fuzzers
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for fuzzer in $FUZZERS ; do
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2022-09-21 14:17:55 +00:00
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cp oss-fuzz/$fuzzer $OUT
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2018-11-09 23:10:24 +00:00
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done
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# build corpora from Git's own packfiles
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zip -j $OUT/fuzz-pack-idx_seed_corpus.zip .git/objects/pack/*.idx
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for packfile in .git/objects/pack/*.pack ; do
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dd ibs=1 skip=12 if=$packfile of=$packfile.trimmed
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done
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zip -j $OUT/fuzz-pack-headers_seed_corpus.zip .git/objects/pack/*.pack.trimmed
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2019-02-19 14:27:26 +00:00
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# build commit-graph corpus
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2021-02-23 06:35:25 +00:00
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ASAN_OPTIONS=detect_leaks=0 ./git commit-graph write
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2019-02-19 14:27:26 +00:00
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zip -j $OUT/fuzz-commit-graph_seed_corpus .git/objects/info/commit-graph
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2018-11-09 23:10:24 +00:00
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# Mute stderr
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for fuzzer in $FUZZERS ; do
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cat >$OUT/$fuzzer.options << EOF
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[libfuzzer]
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2022-10-01 19:38:58 +00:00
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detect_leaks = 0
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2018-11-09 23:10:24 +00:00
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EOF
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done
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2022-09-21 14:17:55 +00:00
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# Generate existing file for temp git repository
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echo "TEMP1TEMP1TEMP1TEMP1" > $OUT/TEMP_1
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echo "TEMP2TEMP2TEMP2TEMP2" > $OUT/TEMP_2
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