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Commit | Line | Data |
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0e76929d | 1 | #!/bin/bash -e |
211635b3 AB |
2 | # |
3 | # OSS-Fuzz build script. See: | |
4 | # https://google.github.io/oss-fuzz/getting-started/new-project-guide/#buildsh | |
5 | # | |
6 | # The file is consumed by: | |
7 | # https://github.com/google/oss-fuzz/blob/master/projects/qemu/Dockerfiles | |
8 | # | |
9 | # This code is licensed under the GPL version 2 or later. See | |
10 | # the COPYING file in the top-level directory. | |
11 | # | |
12 | ||
13 | # build project | |
14 | # e.g. | |
15 | # ./autogen.sh | |
16 | # ./configure | |
17 | # make -j$(nproc) all | |
18 | ||
19 | # build fuzzers | |
20 | # e.g. | |
21 | # $CXX $CXXFLAGS -std=c++11 -Iinclude \ | |
22 | # /path/to/name_of_fuzzer.cc -o $OUT/name_of_fuzzer \ | |
77afc75f | 23 | # -fsanitize=fuzzer /path/to/library.a |
211635b3 AB |
24 | |
25 | fatal () { | |
26 | echo "Error : ${*}, exiting." | |
27 | exit 1 | |
28 | } | |
29 | ||
30 | OSS_FUZZ_BUILD_DIR="./build-oss-fuzz/" | |
31 | ||
32 | # There seems to be a bug in clang-11 (used for builds on oss-fuzz) : | |
33 | # accel/tcg/cputlb.o: In function `load_memop': | |
34 | # accel/tcg/cputlb.c:1505: undefined reference to `qemu_build_not_reached' | |
35 | # | |
36 | # When building with optimization, the compiler is expected to prove that the | |
37 | # statement cannot be reached, and remove it. For some reason clang-11 doesn't | |
38 | # remove it, resulting in an unresolved reference to qemu_build_not_reached | |
39 | # Undefine the __OPTIMIZE__ macro which compiler.h relies on to choose whether | |
40 | # to " #define qemu_build_not_reached() g_assert_not_reached() " | |
41 | EXTRA_CFLAGS="$CFLAGS -U __OPTIMIZE__" | |
42 | ||
43 | if ! { [ -e "./COPYING" ] && | |
44 | [ -e "./MAINTAINERS" ] && | |
45 | [ -e "./Makefile" ] && | |
46 | [ -e "./docs" ] && | |
47 | [ -e "./VERSION" ] && | |
48 | [ -e "./linux-user" ] && | |
49 | [ -e "./softmmu" ];} ; then | |
50 | fatal "Please run the script from the top of the QEMU tree" | |
51 | fi | |
52 | ||
53 | mkdir -p $OSS_FUZZ_BUILD_DIR || fatal "mkdir $OSS_FUZZ_BUILD_DIR failed" | |
54 | cd $OSS_FUZZ_BUILD_DIR || fatal "cd $OSS_FUZZ_BUILD_DIR failed" | |
55 | ||
56 | ||
211635b3 AB |
57 | if [ -z ${OUT+x} ]; then |
58 | DEST_DIR=$(realpath "./DEST_DIR") | |
59 | else | |
60 | DEST_DIR=$OUT | |
61 | fi | |
62 | ||
63 | mkdir -p "$DEST_DIR/lib/" # Copy the shared libraries here | |
64 | ||
65 | # Build once to get the list of dynamic lib paths, and copy them over | |
77afc75f | 66 | ../configure --disable-werror --cc="$CC" --cxx="$CXX" --enable-fuzzing \ |
882084a0 | 67 | --prefix="/opt/qemu-oss-fuzz" \ |
7cee363b | 68 | --extra-cflags="$EXTRA_CFLAGS" --target-list="i386-softmmu" |
211635b3 | 69 | |
64ed6f92 | 70 | if ! make "-j$(nproc)" qemu-fuzz-i386; then |
211635b3 | 71 | fatal "Build failed. Please specify a compiler with fuzzing support"\ |
65fdb3cc | 72 | "using the \$CC and \$CXX environment variables"\ |
211635b3 AB |
73 | "\nFor example: CC=clang CXX=clang++ $0" |
74 | fi | |
75 | ||
3973e7ae AB |
76 | if [ "$GITLAB_CI" != "true" ]; then |
77 | for i in $(ldd ./qemu-fuzz-i386 | cut -f3 -d' '); do | |
78 | cp "$i" "$DEST_DIR/lib/" | |
79 | done | |
80 | rm qemu-fuzz-i386 | |
211635b3 | 81 | |
3973e7ae AB |
82 | # Build a second time to build the final binary with correct rpath |
83 | ../configure --disable-werror --cc="$CC" --cxx="$CXX" --enable-fuzzing \ | |
882084a0 | 84 | --prefix="/opt/qemu-oss-fuzz" \ |
3973e7ae AB |
85 | --extra-cflags="$EXTRA_CFLAGS" --extra-ldflags="-Wl,-rpath,\$ORIGIN/lib" \ |
86 | --target-list="i386-softmmu" | |
87 | make "-j$(nproc)" qemu-fuzz-i386 V=1 | |
88 | fi | |
211635b3 | 89 | |
d5b50236 | 90 | # Place data files in the preinstall tree |
882084a0 | 91 | make install DESTDIR=$DEST_DIR/qemu-bundle |
d5b50236 PB |
92 | rm -rf $DEST_DIR/qemu-bundle/opt/qemu-oss-fuzz/bin |
93 | rm -rf $DEST_DIR/qemu-bundle/opt/qemu-oss-fuzz/libexec | |
211635b3 | 94 | |
7906f11e | 95 | targets=$(./qemu-fuzz-i386 | grep generic-fuzz | awk '$1 ~ /\*/ {print $2}') |
bb451d24 AB |
96 | base_copy="$DEST_DIR/qemu-fuzz-i386-target-$(echo "$targets" | head -n 1)" |
97 | ||
98 | cp "./qemu-fuzz-i386" "$base_copy" | |
a942f64c | 99 | |
211635b3 AB |
100 | # Run the fuzzer with no arguments, to print the help-string and get the list |
101 | # of available fuzz-targets. Copy over the qemu-fuzz-i386, naming it according | |
102 | # to each available fuzz target (See 05509c8e6d fuzz: select fuzz target using | |
103 | # executable name) | |
bb451d24 | 104 | for target in $(echo "$targets" | tail -n +2); |
211635b3 | 105 | do |
53e1a50d AB |
106 | # Ignore the generic-fuzz target, as it requires some environment variables |
107 | # to be configured. We have some generic-fuzz-{pc-q35, floppy, ...} targets | |
108 | # that are thin wrappers around this target that set the required | |
109 | # environment variables according to predefined configs. | |
0e76929d | 110 | if [[ $target == "generic-fuzz-"* ]]; then |
bb451d24 | 111 | ln $base_copy \ |
53e1a50d AB |
112 | "$DEST_DIR/qemu-fuzz-i386-target-$target" |
113 | fi | |
211635b3 AB |
114 | done |
115 | ||
116 | echo "Done. The fuzzers are located in $DEST_DIR" | |
117 | exit 0 |