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add oss-fuzz support
see https://github.com/google/oss-fuzz/pull/2381 the history of the fuzz branch is long and messy and is difficult to rebase on top of the current master. Squashed commit of the following: commit b9d6db50010e185d0af2590a35472e9334102248 Author: Paul Dreik <github@pauldreik.se> Date: Sat Jun 29 21:50:34 2019 +0200 update exception with a more accurate description commit f3fbaf60cc80c7f57fa95962dc0069b10c3d3e61 Author: Paul Dreik <github@pauldreik.se> Date: Sat Jun 29 21:34:55 2019 +0200 fix missing flags in reproduce build commit 40a17bec7a1ad724203577842a254ca9c42da388 Author: Paul Dreik <github@pauldreik.se> Date: Sat Jun 29 21:22:48 2019 +0200 move check for large precision values closer to where needed commit ef6e23e1f52d639c5aec1a1e713157cec380a8c3 Author: Paul Dreik <github@pauldreik.se> Date: Fri Jun 28 20:55:34 2019 +0200 simplify the fuzzer build script commit eadee6e0557be6df695e80f0f2717046a29846e0 Author: Paul Dreik <github@pauldreik.se> Date: Fri Jun 28 20:47:54 2019 +0200 minimize source code pollution commit 1ece6416438f199c164ee9aa89f42ad1f21a4985 Merge: f404079b037b84f2Author: Paul Dreik <github@pauldreik.se> Date: Fri Jun 28 20:22:52 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz # Conflicts: # CMakeLists.txt commit f404079b4e00e51b0d5a4c9218cbe7afb350b777 Author: Paul Dreik <github@pauldreik.se> Date: Fri Jun 28 20:20:52 2019 +0200 make named_arg write into a string or a memory_buffer this makes the fuzzer consistent with the others. commit 545dbe136817eef9e734c32991a324874a51bb4a Author: Paul Dreik <github@pauldreik.se> Date: Thu Jun 20 06:34:17 2019 +0200 tidy up extra newlines, missing std:: etc. commit 2d816ef2b13fc2a46c0df76a91f7912bd7196087 Author: Paul Dreik <github@pauldreik.se> Date: Mon Jun 17 20:49:08 2019 +0200 update unit test to handle expected result following review comment commit a5b9a26808d0165acd2edc4c3baabf9bff40d8bd Author: Paul Dreik <github@pauldreik.se> Date: Mon Jun 17 20:40:06 2019 +0200 update build script to reflect changes after review commit 8411cb78984f76c74bca273c0bb18918e084e711 Author: Paul Dreik <github@pauldreik.se> Date: Mon Jun 17 20:39:39 2019 +0200 review comment: clarify what the .gitignore is for commit 18d9e7bb43d98568fe491e076106e4fa29070b33 Author: Paul Dreik <github@pauldreik.se> Date: Mon Jun 17 20:36:56 2019 +0200 review comment: don't touch root .gitignore commit 7683d7faa116a6e261da824ec6c1a6a75689841b Author: Paul Dreik <github@pauldreik.se> Date: Mon Jun 17 20:35:40 2019 +0200 review comment: condiionally include main.cpp commit be0bdaeb27b0c1914cc0b0fd85c2b3bcc6fd2245 Author: Paul Dreik <github@pauldreik.se> Date: Mon Jun 17 20:31:28 2019 +0200 review comment: drop commented out code not working on travis commit 013429812d7fb745eec146296623ea245c4848b4 Author: Paul Dreik <github@pauldreik.se> Date: Mon Jun 17 20:30:26 2019 +0200 review comment: renumber case labels the old ones were to be able to reuse the corpus, let's drop it commit f66fe7bead4a71978f21d9e47a8f3f9e4935fccd Author: Paul Dreik <github@pauldreik.se> Date: Mon Jun 17 20:06:47 2019 +0200 review comment: libfmt->fmt commit 4a4ddb654dd5b90646cd7e6ff45318c17b66dc9f Author: Paul Dreik <github@pauldreik.se> Date: Mon Jun 17 20:05:32 2019 +0200 reuse fmt_safe_duration_cast commit 0a1679411a8bd77c2ff34e1cd572307c92e12040 Author: Paul Dreik <github@pauldreik.se> Date: Mon Jun 17 20:02:48 2019 +0200 review comment: name convention, better name C was for "chrono duration" commit 63084cac00b798c636e0dc13207df46a5c4539f6 Author: Paul Dreik <github@pauldreik.se> Date: Mon Jun 17 20:00:50 2019 +0200 reuse earlier extract fmt_safe_... function commit b23388d4d7f919163ead9a9e9bdd50d14daf80b7 Author: Paul Dreik <github@pauldreik.se> Date: Mon Jun 17 19:58:55 2019 +0200 review comment: don't output inf.inf commit 6f861f1d89d2127bbe2446d176d59a354665cc15 Author: Paul Dreik <github@pauldreik.se> Date: Mon Jun 17 19:57:00 2019 +0200 review comment: extract function for invoking safe_duration_cast commit df19bc87ccff77d4bedf54fa3d3992f78ef699bd Author: Paul Dreik <github@pauldreik.se> Date: Mon Jun 17 19:47:30 2019 +0200 review comment: leftover garbage commit 84eea802efb1164c4f2a83b2e480a7c5bdf4e921 Author: Paul Dreik <github@pauldreik.se> Date: Mon Jun 17 19:45:22 2019 +0200 review comment: turn cmake option into macro for SAFE_DURATION_CAST decided to have it on by default commit c3a159498c2544a52662cd03d23d5a1d00537bba Author: Paul Dreik <github@pauldreik.se> Date: Mon Jun 17 19:40:14 2019 +0200 review comment: extra newline commit aa556875c5161d817c347ff984dad171c7a35df9 Author: Paul Dreik <github@pauldreik.se> Date: Mon Jun 17 19:38:49 2019 +0200 review comment: file name convention commit 4102d82c455324bda4ccd64072eab86b3f0ecebf Merge: 28add37d4912cff6Author: Paul Dreik <github@pauldreik.se> Date: Mon Jun 17 16:29:29 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz commit 28add37df3944cbaa00f614e8063210a6d83c17c Author: Paul Dreik <github@pauldreik.se> Date: Fri Jun 14 21:44:06 2019 +0200 disable check to pass travis commit 4119378aedfd3e4063058e8f1f03c29d9f44d5e8 Author: Paul Dreik <github@pauldreik.se> Date: Fri Jun 14 21:32:39 2019 +0200 add missing include commit ba2efb82f20d6ecb5e49a8c6ced96a7febedc175 Author: Paul Dreik <github@pauldreik.se> Date: Fri Jun 14 21:04:41 2019 +0200 try working around build issue on travis commit 380671a2cb6e52f2b7d5eaad409d491baba5b7e6 Author: Paul Dreik <github@pauldreik.se> Date: Fri Jun 14 20:22:41 2019 +0200 write positive infinity without sign commit fd72b9adace17e00c46aae24e061bf14c3af6bb1 Author: Paul Dreik <github@pauldreik.se> Date: Fri Jun 14 20:20:50 2019 +0200 remove leftover from merge commit 1ae3128be2c53914e4c840d12e1b02c59758c378 Author: Paul Dreik <github@pauldreik.se> Date: Fri Jun 14 20:14:45 2019 +0200 format to buffer instead of string commit 1d83a561244c2fe81231d17e911c6eb24c87cac4 Author: Paul Dreik <github@pauldreik.se> Date: Fri Jun 14 19:50:19 2019 +0200 fix warnings commit a33b45a7bb5cf70eb3ef1cd95908282621195f1f Author: Paul Dreik <github@pauldreik.se> Date: Fri Jun 14 19:43:46 2019 +0200 refactor and fix warnings commit 02afb12dd5b05804a1a8b55e1b9fb7e3de593e84 Author: Paul Dreik <github@pauldreik.se> Date: Fri Jun 14 19:17:27 2019 +0200 use fixed size input commit 35f84c8cf20efb18a137efecd10dcdc6bcebf7b5 Author: Paul Dreik <github@pauldreik.se> Date: Fri Jun 14 19:07:43 2019 +0200 factor out main into a separate file commit a23b7a198ba739dd813897901855c98441e6f29b Author: Paul Dreik <github@pauldreik.se> Date: Fri Jun 14 18:56:40 2019 +0200 refactor commit 9a3f4cfb3bc32a304a1a49b8ff24fbc2f924266c Merge: 7842582a12f46838Author: Paul Dreik <github@pauldreik.se> Date: Fri Jun 14 18:20:03 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz # Conflicts: # include/fmt/chrono.h commit 7842582a0089c24a5d44bbb2d156beb732bb7b58 Merge: 90cab5aacbbee1b3Author: Paul Dreik <github@pauldreik.se> Date: Thu Jun 13 10:41:34 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz commit 90cab5aa023271a3a746cf9c60dd613b4546ca10 Merge: 8feb8a3fe5422db4Author: Paul Dreik <github@pauldreik.se> Date: Wed Jun 12 18:49:08 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz commit 8feb8a3fe20da043a8303e59b1580b4b2862cc57 Merge: e9fabac187fbc6f7Author: Paul Dreik <github@pauldreik.se> Date: Tue Jun 11 19:18:35 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz commit e9fabac1dd6d710fec1b30ca51dc953f57f2f9f5 Merge: eaff9316e1a67b52Author: Paul Dreik <github@pauldreik.se> Date: Mon Jun 10 22:38:36 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz commit eaff93166402ff9a16a9ab0fab1081104f4f06b8 Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 22:29:01 2019 +0200 drop old crashes commit 7f861e481abb7367bd187c92fe202e25d36d0dd0 Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 21:47:30 2019 +0200 build fuzzers as part of the linux clang 6 build commit 42c339066dce148723f452d4a94487a6ac80637f Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 21:42:12 2019 +0200 travis has old libs commit 9264e3ac82582a941eba3501301dee1468175c08 Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 21:33:26 2019 +0200 more travis workarounds commit c6eed3adaf6cf65d440dd58c88a034f61c55114f Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 21:27:49 2019 +0200 travis workaround commit 5e230d6240841dbc67f0c08ace3a1c24defea54f Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 21:15:36 2019 +0200 fix constexpr issues commit cc5fc033479c769a8ac19115aef48020c532c943 Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 21:11:13 2019 +0200 add a fuzzer build commit 3997375296eca0d0455e0935ef3aed8b010ecf2d Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 20:53:04 2019 +0200 fix minor documentation errors commit 1572411261abd5c0756ff2998ab707f1131d4fdf Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 20:49:25 2019 +0200 polish the documentation commit 9e5274437cfc3e9c82131c14cf7f3a0abdb10025 Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 20:32:45 2019 +0200 remove unused headers commit 4b2492a5e037d3153de342ef7f2729b69e8f5dce Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 20:28:12 2019 +0200 clang format commit a0004ebb417bce5a24c15ea65a0f3741e45b8480 Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 20:27:02 2019 +0200 format also void* commit 820142ee2076ae17fea25857c41a1ecdca4a8521 Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 20:12:21 2019 +0200 improve two_args with lessons learnt from the others commit 7b8fd7f5123fccf78b600c69ca25d025582c095e Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 20:11:18 2019 +0200 improve function names commit 641bf36a7a061abf6a02d5e31f3adeb33b079f43 Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 20:07:29 2019 +0200 clang format commit 7975c0c3cbe19a7159336ad8fcb170fa6259b1cb Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 20:06:02 2019 +0200 apply lessons learned from chrono fuzzer on sprintf commit 972124c9f921f8ef786f99c294f556bb7dd9b9ee Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 19:55:49 2019 +0200 format to buffer instead of string commit 7b015c692364d1e087a59dfe83dda1b8f8fd2991 Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 19:50:25 2019 +0200 apply lessons learned from the chrono fuzzer at one_arg commit daa8ea95dd71704e367b760fa6605f5a7cac6890 Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 19:41:17 2019 +0200 renumber cases commit a667365d0e0f3eb0bc6d6f2cfee5e128a6574aee Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 19:38:06 2019 +0200 clang format commit e0e361b8a3594c43e131d661a28381613a186c2b Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 19:36:35 2019 +0200 disable fuzzing by default commit ccb4274ab246ee1fe3becb2b73432179a8a5fe6f Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 19:36:25 2019 +0200 refresh named_arg with lessons learnt from the chrono fuzzer commit 60da706d4ef35c18eb967bf4ba8d395ef05a9c61 Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 19:36:00 2019 +0200 fix build error commit e361bfc24246d7c7e91f5e45209eda2f22689d98 Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 19:00:11 2019 +0200 add comment about formatting to string vs. memory buffer commit 74c0ed062d34eae1786ca699886ad4f3bccc7fd1 Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 18:51:23 2019 +0200 try to use better names commit 4efea36f77020eecf3c7826f891417f94aedf6f4 Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 18:46:07 2019 +0200 fix clang build error commit 03cdd2e4631ad302dde3e1048671d3bb08956096 Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 18:44:21 2019 +0200 drop workarounds fixed upstream commit e936829ebbd97ed2e6f8c5f595b414c0982f2e4d Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 18:41:02 2019 +0200 move the fuzzers into the test/ subdirectory commit 2967765698259764c1f06966a7cdefbc5365e5f2 Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 18:30:03 2019 +0200 revert temporary tests handled upstream commit 749c5027b0eab3d90d8fbfb6e55ee313a7f7dfe4 Merge: dee690885d9100faAuthor: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 17:49:00 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz commit dee690881bd33bb77bee1d5ffce643e8bef84a33 Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 17:40:37 2019 +0200 keep documentation comment formatted properly commit 87d2c99487eef586ce54d432697f384cbe7a50e1 Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 17:36:12 2019 +0200 switch to fmt constexpr macros commit c23fa59139c425a3dfa2e5eeaeb3269c251c90d1 Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 17:30:22 2019 +0200 clang format commit 9e58207e9b24a8cc90c721277405b409dd61740d Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 17:27:03 2019 +0200 get rid of safe_duration_cast submodule replaced with an embedded miniature version commit a4d36eac46e5db45ded96f80f84986f4f76ea0ec Author: Paul Dreik <github@pauldreik.se> Date: Sun Jun 9 17:25:00 2019 +0200 add safe_duration_cast into fmt commit 7d5b0ecef37722c40952251c88d74a2552221d84 Author: Paul Dreik <github@pauldreik.se> Date: Sat Jun 8 22:39:33 2019 +0200 mark #1194 as fixed commit ee91514ecf7a8788f2081996db85eef50d7cd57b Merge: 605691174faadff0Author: Paul Dreik <github@pauldreik.se> Date: Sat Jun 8 22:25:37 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz commit 6056911784bc86e6caf56a61fd64142f113d531e Author: Paul Dreik <github@pauldreik.se> Date: Wed Jun 5 09:58:30 2019 +0200 format to small size buffer instead of string commit 9f006097255c239188840b589f6e39cbb4476481 Author: Paul Dreik <github@pauldreik.se> Date: Wed Jun 5 09:45:23 2019 +0200 switch to fmt::string_view and workaround reported bug commit 387de0d9440852fac974ff165b2555d54e2380da Author: Paul Dreik <github@pauldreik.se> Date: Wed Jun 5 06:26:15 2019 +0200 ignore build directories commit 55da271c5bb3c11a239c4e46570b6741803ce329 Merge: 3716491ec264e641Author: Paul Dreik <github@pauldreik.se> Date: Wed Jun 5 06:12:36 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz commit 3716491ec51c34a918834857c67300eea180ba02 Author: Paul Dreik <github@pauldreik.se> Date: Mon Jun 3 07:03:29 2019 +0200 fix UB in on_second commit 2740241b13b7417a4dae655f825ea5a551ffe7ba Merge: 1c258402d54e64b3Author: Paul Dreik <github@pauldreik.se> Date: Mon Jun 3 06:37:18 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz # Conflicts: # include/fmt/chrono.h commit 1c258402a4bd03f390e0256fa9475cc5187d37f9 Merge: ca9596d1f57227a1Author: Paul Dreik <github@pauldreik.se> Date: Sat Jun 1 08:01:58 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz commit ca9596d1c91b0315b407ce2c4b3e9e5ba1aeb640 Merge: 1c274cfdd07cc202Author: Paul Dreik <github@pauldreik.se> Date: Thu May 30 19:42:33 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz commit 1c274cfd4112138bfc59dd16f58022016128fe85 Author: Paul Dreik <github@pauldreik.se> Date: Thu May 30 08:12:10 2019 +0200 make it easier for the chrono fuzzer to explore using a fixed size makes the cases cross pollinate each other better. the execution speed is much higher as well commit f0d7cccdc70c98576b7129428c416e7c9e68a8aa Author: Paul Dreik <github@pauldreik.se> Date: Thu May 30 07:36:21 2019 +0200 add a build adapted for analysis of fuzzing performance commit 56f7cf3fa979de415174a10b18221727e3138b7b Author: Paul Dreik <github@pauldreik.se> Date: Thu May 30 06:25:10 2019 +0200 allow negative values again commit a77a5fc505bbeab1cfa36be16d40f7799689317a Author: Paul Dreik <github@pauldreik.se> Date: Thu May 30 05:45:55 2019 +0200 fix UB on signed int overflow in chrono_formatter constructor see https://github.com/fmtlib/fmt/issues/1179 commit b6a592720be520b58ed2f2d8668ffc6c8b71f0f7 Merge: 492a204630bce6c1Author: Paul Dreik <github@pauldreik.se> Date: Thu May 30 05:26:30 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz # Conflicts: # include/fmt/chrono.h commit 492a204623c3c4bbf04c9d47d69979d3a484959c Author: Paul Dreik <github@pauldreik.se> Date: Wed May 29 21:36:00 2019 +0200 fix bad assert commit 0ae68b03fbb0e80e292a01f529d5cd7e76349907 Author: Paul Dreik <github@pauldreik.se> Date: Wed May 29 21:35:49 2019 +0200 add unsigned types for chrono fuzzing commit 2753d7db76645e8847ff2110c5e98f5c8de4a6b9 Author: Paul Dreik <github@pauldreik.se> Date: Wed May 29 20:25:21 2019 +0200 use C++17 commit bc12742f098ec8b513985daedc57faa518203eb0 Author: Paul Dreik <github@pauldreik.se> Date: Wed May 29 19:44:59 2019 +0200 add symlink for safe_duration_cast commit 67201d2639b93736768e109d73b3e9ccc9401c48 Author: Paul Dreik <github@pauldreik.se> Date: Wed May 29 19:40:40 2019 +0200 turn on safe duration cast for the fuzzer builds commit 31a70080a63a5213594e4b4e6a33e7e315cf756e Author: Paul Dreik <github@pauldreik.se> Date: Wed May 29 19:32:52 2019 +0200 clang format commit 981e30c5782d04453ece1b31e887da4f29268370 Author: Paul Dreik <github@pauldreik.se> Date: Wed May 29 19:30:19 2019 +0200 reduce maximum allocation size commit 7ba51da81de7ecbc5498a22dc29de5b0648bcad2 Author: Paul Dreik <github@pauldreik.se> Date: Wed May 29 19:30:01 2019 +0200 make nan unit test pass commit 95b4b9c28a589c30727826dd4e1367bebfad5894 Author: Paul Dreik <github@pauldreik.se> Date: Wed May 29 18:39:08 2019 +0200 special case nan and inf commit 2673c965506e51d150c005340698a6e15d98aaba Author: Paul Dreik <github@pauldreik.se> Date: Wed May 29 16:40:11 2019 +0200 build a fast fuzzer, for making coverage fast commit db52b62612fd7ea3ceeaee05584fd8cb83e54a35 Author: Paul Dreik <github@pauldreik.se> Date: Wed May 29 16:39:48 2019 +0200 add safe duration cast as submodule commit c8a028faec5d91728472f5de01ea8b1766fb929d Author: Paul Dreik <github@pauldreik.se> Date: Wed May 29 16:00:26 2019 +0200 enable chrono fuzzing for non-negative values commit de3555cc573e561691858ca16586f8b45a3ae703 Author: Paul Dreik <github@pauldreik.se> Date: Wed May 29 13:06:35 2019 +0200 try start using safe duration cast commit 5c3245118c3debcb3f6f69c04c2c32d48449ee16 Author: Paul Dreik <github@pauldreik.se> Date: Wed May 29 09:59:34 2019 +0200 add failing test commit 3a565d3b091c29210e24042f86869fecafb70914 Author: Paul Dreik <github@pauldreik.se> Date: Wed May 29 09:59:09 2019 +0200 fix cmake option type (should be string, not bool) commit 61c67564207a13992b1c69d95614b2c4aec5df86 Merge: 63e7b9e3bb254d14Author: Paul Dreik <github@pauldreik.se> Date: Wed May 29 07:03:42 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz commit 63e7b9e32c714c594d019ef463c9c40a3510a2f2 Merge: 7dd1d80f5e7bdf1bAuthor: Paul Dreik <github@pauldreik.se> Date: Fri May 17 19:17:20 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz commit 7dd1d80f3a32465d0fa13ce733bff8686a5b0bad Merge: 2c9aa5a32a9e8b52Author: Paul Dreik <github@pauldreik.se> Date: Tue May 14 19:38:32 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz commit 2c9aa5a31e64af25f8bb4afa8134258822532d3e Merge: 16a442c82c77562bAuthor: Paul Dreik <github@pauldreik.se> Date: Tue May 14 06:33:16 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz commit 16a442c864dbdce70c22b4a859dba5e3b5edaf35 Merge: b1d70b61f4dfd6e3Author: Paul Dreik <github@pauldreik.se> Date: Sun May 12 15:24:31 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz # Conflicts: # include/fmt/chrono.h commit b1d70b6144c7a61e580eb44ec7d1bdd2368f5531 Author: Paul Dreik <github@pauldreik.se> Date: Fri May 10 08:52:57 2019 +0200 prevent excessive time (found by oss-fuzz) the following triggered this: std::string message = fmt::format("\377{:.214718908}\377", fmt::arg("/\0", 0.f)); there are probably more places with calls to fill_n which could be checked commit 9a91093a6b20fd22afd6739f5dcba3b00f6f8eaf Merge: 7de0fdece9bab6d0Author: Paul Dreik <github@pauldreik.se> Date: Thu May 9 06:06:32 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz # Conflicts: # include/fmt/chrono.h commit 7de0fdec38270f2d0302413904a5ef1b13d47177 Author: Paul Dreik <github@pauldreik.se> Date: Sun May 5 20:08:53 2019 +0200 clang format commit bb375e1ca10eb3cc2c6684bf698ad4738ab7eb10 Author: Paul Dreik <github@pauldreik.se> Date: Sun May 5 19:47:10 2019 +0200 seems to pass the unit test now (except for the nan stuff from victor) commit 786b4b7351bc8e305ad7e68d11ca6b542f66d456 Author: Paul Dreik <github@pauldreik.se> Date: Sun May 5 19:25:23 2019 +0200 add assert triggering data, and unit test commit 2790e480b81ec83d00315aa69407fe71b8c4c637 Merge: fa859a05ca978b3dAuthor: Paul Dreik <github@pauldreik.se> Date: Sun May 5 18:42:51 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz commit fa859a05c2c3abef263166f3a44cdbaa3122d642 Author: Paul Dreik <github@pauldreik.se> Date: Sun May 5 18:18:54 2019 +0200 add crash commit 1f6e341b1c4bc966a44c7a98b63f22bd65958d0b Author: Paul Dreik <github@pauldreik.se> Date: Sun May 5 18:18:27 2019 +0200 assert floating point is finite internally commit 50877748d08a0f4433af4f1213c5bc9021e76e7a Author: Paul Dreik <github@pauldreik.se> Date: Sun May 5 17:32:03 2019 +0200 invoke undefined behaviour inside chrono commit bac7ac4149f2d001f7b36236e1710484674d029b Author: Paul Dreik <github@pauldreik.se> Date: Sun May 5 17:31:35 2019 +0200 refactor the fuzzer build script commit b19c4cd84a0c8b6d4a7beb281ad881156173ce78 Author: Paul Dreik <github@pauldreik.se> Date: Sun May 5 16:25:11 2019 +0200 add one more crash commit 7607592e06ebaa189dc180441fa1863430e0938e Author: Paul Dreik <github@pauldreik.se> Date: Sun May 5 16:24:05 2019 +0200 add crashing input commit b059a98b27b40cd284e08a54493c25363d743557 Author: Paul Dreik <github@pauldreik.se> Date: Sun May 5 16:21:25 2019 +0200 trigger undefined behaviour with NaN durations commit 7cce33250282b397c00159e6809125f5fc1c0190 Author: Paul Dreik <github@pauldreik.se> Date: Sun May 5 16:20:51 2019 +0200 add asan only fuzzer commit 757319a4e30978d8661b3be8f75937266071b413 Merge: a574b21cc1d430e6Author: Paul Dreik <github@pauldreik.se> Date: Sun May 5 06:34:59 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz # Conflicts: # test/chrono-test.cc commit a574b21c840339abef5e4ad33612b6efac6ad54b Author: Paul Dreik <github@pauldreik.se> Date: Sat May 4 12:54:13 2019 +0200 disable chrono fuzzing for now it triggers integer overflow and is not trivial to solve. commit ff17322bceba53e0c2d9ebcf3756115ad148195e Merge: d6a5985129c10fbfAuthor: Paul Dreik <github@pauldreik.se> Date: Sat May 4 07:29:39 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz commit d6a598511c7dc0c208c2d688b2943b0d7c092029 Merge: 663b15924a4d72f9Author: Paul Dreik <github@pauldreik.se> Date: Wed May 1 20:44:16 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz # Conflicts: # test/chrono-test.cc commit 663b159235f8ae5f58fe80bb02d49bfa392056b0 Author: Paul Dreik <github@pauldreik.se> Date: Sun Apr 28 22:36:07 2019 +0200 add crash case (triggers assertion) commit 082a5cb226142ea30b415d4231cea9425748741a Author: Paul Dreik <github@pauldreik.se> Date: Sun Apr 28 21:44:19 2019 +0200 add const commit b8d70919ea6be0d2e4c58ef82887496f55125ba9 Author: Paul Dreik <github@pauldreik.se> Date: Sun Apr 28 21:29:43 2019 +0200 provoke assertion fmt/include/fmt/core.h:246: typename std::make_unsigned<_Tp>::type fmt::v5::internal::to_unsigned(Int) [with Int = long int; typename std::make_unsigned<_Tp>::type = long unsigned int]: Assertion `(value >= 0) && "negative value"' failed. commit e1966013af4eb7febf047d4629cc6236a6aae0e3 Author: Paul Dreik <github@pauldreik.se> Date: Sun Apr 28 20:46:16 2019 +0200 add more crashes commit 1394ae3fe915319ce7dc63d6a9dc820a29c9539e Merge: 89338cad4c721e3aAuthor: Paul Dreik <github@pauldreik.se> Date: Sun Apr 28 17:16:14 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz commit 89338cad4eed9441644ec8c5f1687b511c829ea4 Author: Paul Dreik <github@pauldreik.se> Date: Sun Apr 28 09:40:32 2019 +0200 add notes on how to reproduce crashes commit 7dc3e4c7223617da274c4cccb9cf5459d0510e0b Author: Paul Dreik <github@pauldreik.se> Date: Sun Apr 28 09:28:20 2019 +0200 add crashes from chrono duration commit b62e8bc783134c2d15ebf0372c8a61b41624e6b1 Author: Paul Dreik <github@pauldreik.se> Date: Sun Apr 28 09:26:53 2019 +0200 rename fuzzer commit 7f4ab2b80d072fe3ad96e37e45f3fa807a85c99f Author: Paul Dreik <github@pauldreik.se> Date: Sun Apr 28 09:15:38 2019 +0200 clang format commit a6cc2a35a9799e88b9ed89e578b7aefd9b09ad09 Author: Paul Dreik <github@pauldreik.se> Date: Sun Apr 28 09:12:04 2019 +0200 add chrono duration fuzzer commit 682713c9a61d52b46e95fdb7d970a8733f77ce88 Merge: 8b934b378d8ea21cAuthor: Paul Dreik <github@pauldreik.se> Date: Sun Apr 28 08:07:56 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz commit 8b934b37161d1389de603ced6560982507bb7ae5 Author: Paul Dreik <github@pauldreik.se> Date: Sat Apr 27 10:23:44 2019 +0200 clang format commit 793d97b9af33269f5628094f547f9771e968e3f2 Author: Paul Dreik <github@pauldreik.se> Date: Sat Apr 27 10:23:17 2019 +0200 tighten memory allocation commit e2301f2430b15c9817433206597ef82c990f49a0 Author: Paul Dreik <github@pauldreik.se> Date: Sat Apr 27 10:19:56 2019 +0200 clean up and set license (BSD 2-clause simplified, same as fmt) commit e64c3fb35719afa644dee1f9f17829cace6e17ff Author: Paul Dreik <github@pauldreik.se> Date: Sat Apr 27 10:04:23 2019 +0200 clean up and add afl commit ab46241206aaf46759fd3f292ee4a1088b652d15 Author: Paul Dreik <github@pauldreik.se> Date: Sat Apr 27 09:54:48 2019 +0200 drop c++17 requirement commit 20c01e1acf330c8a28192f55b16efeebddb72ab0 Author: Paul Dreik <github@pauldreik.se> Date: Sat Apr 27 09:25:19 2019 +0200 initial oss-fuzz compatible version commit 6cbd91a37cf36a1d0e994bb16cf44a12622f7dca Author: Paul Dreik <github@pauldreik.se> Date: Sat Apr 27 08:42:51 2019 +0200 initial commit of fuzzers from https://github.com/pauldreik/fuzzfmt commit eaddfb16d86ef1c259b737e2aab40145b0c956a6 Merge: e37d7db3134904c8Author: Paul Dreik <github@pauldreik.se> Date: Sat Apr 27 08:38:19 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz commit e37d7db3b938c82f569d71e6bb00bd1bf8394db7 Merge: 99b2e08bbd516e34Author: Paul Dreik <github@pauldreik.se> Date: Sun Apr 21 17:28:06 2019 +0200 Merge remote-tracking branch 'upstream/master' into fuzz commit 99b2e08b6bef25b793df5ef07621c9c4402587de Author: Paul Dreik <github@pauldreik.se> Date: Sun Apr 21 10:30:56 2019 +0200 stop high memory use when fuzzing
This commit is contained in:
Paul Dreik
Victor Zverovich
parent
037b84f214
commit
9d97201ede
@ -65,8 +65,8 @@ matrix:
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- env: BUILD=Release STANDARD=14
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compiler: clang
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os: osx
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# clang 6.0 on Linux with C++14
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- env: COMPILER=clang++-6.0 BUILD=Debug STANDARD=14
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# clang 6.0 on Linux with C++14 (builds the fuzzers as well)
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- env: COMPILER=clang++-6.0 BUILD=Debug STANDARD=14 ENABLE_FUZZING=1
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compiler: clang
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addons:
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apt:
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@ -41,6 +41,7 @@ option(FMT_WERROR "Halt the compilation with an error on compiler warnings."
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option(FMT_DOC "Generate the doc target." ${MASTER_PROJECT})
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option(FMT_INSTALL "Generate the install target." ${MASTER_PROJECT})
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option(FMT_TEST "Generate the test target." ${MASTER_PROJECT})
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option(FMT_FUZZ "Generate the fuzz target." OFF)
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project(FMT CXX)
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@ -151,7 +152,7 @@ endfunction()
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# Define the fmt library, its includes and the needed defines.
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add_headers(FMT_HEADERS chrono.h color.h core.h format.h format-inl.h locale.h
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ostream.h prepare.h printf.h ranges.h)
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ostream.h prepare.h printf.h ranges.h safe-duration-cast.h)
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set(FMT_SOURCES src/format.cc)
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if (HAVE_OPEN)
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add_headers(FMT_HEADERS posix.h)
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@ -190,6 +191,9 @@ if (BUILD_SHARED_LIBS)
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endif ()
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target_compile_definitions(fmt PRIVATE FMT_EXPORT INTERFACE FMT_SHARED)
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endif ()
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if (FMT_SAFE_DURATION_CAST)
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target_compile_definitions(fmt PUBLIC FMT_SAFE_DURATION_CAST)
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endif()
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add_library(fmt-header-only INTERFACE)
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add_library(fmt::fmt-header-only ALIAS fmt-header-only)
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@ -271,6 +275,11 @@ if (FMT_TEST)
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add_subdirectory(test)
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endif ()
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# control fuzzing independent of the unit tests
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if (FMT_FUZZ)
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add_subdirectory(test/fuzzing)
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endif ()
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set(gitignore ${PROJECT_SOURCE_DIR}/.gitignore)
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if (MASTER_PROJECT AND EXISTS ${gitignore})
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# Get the list of ignored files from .gitignore.
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@ -16,6 +16,15 @@
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#include <locale>
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#include <sstream>
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// enable safe chrono durations, unless explicitly disabled
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#ifndef FMT_SAFE_DURATION_CAST
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# define FMT_SAFE_DURATION_CAST 1
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#endif
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#if FMT_SAFE_DURATION_CAST
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# include "safe-duration-cast.h"
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#endif
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FMT_BEGIN_NAMESPACE
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// Prevents expansion of a preceding token as a function-style macro.
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@ -385,6 +394,15 @@ inline bool isnan(T value) {
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return std::isnan(value);
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}
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template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
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inline bool isfinite(T) {
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return true;
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}
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template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
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inline bool isfinite(T value) {
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return std::isfinite(value);
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}
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// Convers value to int and checks that it's in the range [0, upper).
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template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
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inline int to_nonnegative_int(T value, int upper) {
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@ -421,12 +439,40 @@ template <typename T> struct make_unsigned_or_unchanged<T, true> {
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using type = typename std::make_unsigned<T>::type;
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};
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#if FMT_SAFE_DURATION_CAST
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// throwing version of safe_duration_cast
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template <typename To, typename FromRep, typename FromPeriod>
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To fmt_safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from) {
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int ec;
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To to= safe_duration_cast::safe_duration_cast<To>(from,ec);
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if (ec) {
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FMT_THROW(format_error("cannot format duration"));
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}
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return to;
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}
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#endif
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template <typename Rep, typename Period,
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FMT_ENABLE_IF(std::is_integral<Rep>::value)>
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inline std::chrono::duration<Rep, std::milli> get_milliseconds(
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std::chrono::duration<Rep, Period> d) {
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// this may overflow and/or the result may not fit in the
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// target type.
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#if FMT_SAFE_DURATION_CAST
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using CommonSecondsType =
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typename std::common_type<decltype(d), std::chrono::seconds>::type;
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const auto d_as_common = fmt_safe_duration_cast<CommonSecondsType>(d);
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const auto d_as_whole_seconds =
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fmt_safe_duration_cast<std::chrono::seconds>(d_as_common);
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// this conversion should be nonproblematic
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const auto diff = d_as_common - d_as_whole_seconds;
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const auto ms =
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fmt_safe_duration_cast<std::chrono::duration<Rep, std::milli>>(diff);
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return ms;
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#else
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auto s = std::chrono::duration_cast<std::chrono::seconds>(d);
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return std::chrono::duration_cast<std::chrono::milliseconds>(d - s);
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#endif
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}
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template <typename Rep, typename Period,
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@ -476,8 +522,35 @@ struct chrono_formatter {
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val = -val;
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negative = true;
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}
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// this may overflow and/or the result may not fit in the
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// target type.
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#if FMT_SAFE_DURATION_CAST
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// might need checked conversion (rep!=Rep)
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auto tmpval = std::chrono::duration<rep, Period>(val);
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s = fmt_safe_duration_cast<seconds>(tmpval);
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#else
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s = std::chrono::duration_cast<seconds>(
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std::chrono::duration<rep, Period>(val));
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#endif
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}
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// returns true if nan or inf, writes to out.
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bool handle_nan_inf() {
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if (isfinite(val)) {
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return false;
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}
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if (isnan(val)) {
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write_nan();
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return true;
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}
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// must be +-inf
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if (val > 0) {
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write_pinf();
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} else {
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write_ninf();
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}
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return true;
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}
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Rep hour() const { return static_cast<Rep>(mod((s.count() / 3600), 24)); }
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@ -517,6 +590,8 @@ struct chrono_formatter {
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}
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void write_nan() { std::copy_n("nan", 3, out); }
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void write_pinf() { std::copy_n("inf", 3, out); }
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void write_ninf() { std::copy_n("-inf", 4, out); }
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void format_localized(const tm& time, const char* format) {
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if (isnan(val)) return write_nan();
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@ -549,6 +624,10 @@ struct chrono_formatter {
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void on_tz_name() {}
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void on_24_hour(numeric_system ns) {
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if (handle_nan_inf()) {
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return;
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}
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if (ns == numeric_system::standard) return write(hour(), 2);
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auto time = tm();
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time.tm_hour = to_nonnegative_int(hour(), 24);
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@ -556,6 +635,10 @@ struct chrono_formatter {
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}
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void on_12_hour(numeric_system ns) {
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if (handle_nan_inf()) {
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return;
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}
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if (ns == numeric_system::standard) return write(hour12(), 2);
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auto time = tm();
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time.tm_hour = to_nonnegative_int(hour12(), 12);
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@ -563,6 +646,10 @@ struct chrono_formatter {
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}
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void on_minute(numeric_system ns) {
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if (handle_nan_inf()) {
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return;
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}
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if (ns == numeric_system::standard) return write(minute(), 2);
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auto time = tm();
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time.tm_min = to_nonnegative_int(minute(), 60);
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@ -570,9 +657,21 @@ struct chrono_formatter {
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}
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void on_second(numeric_system ns) {
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if (handle_nan_inf()) {
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return;
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}
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if (ns == numeric_system::standard) {
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write(second(), 2);
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auto ms = get_milliseconds(std::chrono::duration<Rep, Period>(val));
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#if FMT_SAFE_DURATION_CAST
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// convert rep->Rep
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using duration_rep = std::chrono::duration<rep, Period>;
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using duration_Rep = std::chrono::duration<Rep, Period>;
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auto tmpval = fmt_safe_duration_cast<duration_Rep>(duration_rep{val});
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#else
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auto tmpval = std::chrono::duration<Rep, Period>(val);
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#endif
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auto ms = get_milliseconds(tmpval);
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if (ms != std::chrono::milliseconds(0)) {
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*out++ = '.';
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write(ms.count(), 3);
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@ -584,9 +683,21 @@ struct chrono_formatter {
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format_localized(time, "%OS");
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}
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void on_12_hour_time() { format_localized(time(), "%r"); }
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void on_12_hour_time() {
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if (handle_nan_inf()) {
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return;
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}
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format_localized(time(), "%r");
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}
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void on_24_hour_time() {
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if (handle_nan_inf()) {
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*out++ = ':';
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handle_nan_inf();
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return;
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}
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write(hour(), 2);
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*out++ = ':';
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write(minute(), 2);
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@ -595,12 +706,24 @@ struct chrono_formatter {
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void on_iso_time() {
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on_24_hour_time();
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*out++ = ':';
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if (handle_nan_inf()) {
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return;
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}
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write(second(), 2);
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}
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void on_am_pm() { format_localized(time(), "%p"); }
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void on_am_pm() {
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if (handle_nan_inf()) {
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return;
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}
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format_localized(time(), "%p");
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}
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void on_duration_value() {
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if (handle_nan_inf()) {
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return;
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}
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write_sign();
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out = format_chrono_duration_value(out, val, precision);
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}
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@ -244,6 +244,11 @@ template <> FMT_FUNC int count_digits<4>(internal::fallback_uintptr n) {
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template <typename T>
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int format_float(char* buf, std::size_t size, const char* format, int precision,
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T value) {
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#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
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if (precision > 100000) {
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throw std::runtime_error("fuzz mode - avoid large allocation inside snprintf");
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}
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#endif
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// Suppress the warning about nonliteral format string.
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auto snprintf_ptr = FMT_SNPRINTF;
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return precision < 0 ? snprintf_ptr(buf, size, format, value)
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@ -398,6 +398,11 @@ class basic_memory_buffer : private Allocator, public internal::buffer<T> {
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template <typename T, std::size_t SIZE, typename Allocator>
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void basic_memory_buffer<T, SIZE, Allocator>::grow(std::size_t size) {
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#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
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if (size > 1000) {
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throw std::runtime_error("fuzz mode - won't grow that much");
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||||
}
|
||||
#endif
|
||||
std::size_t old_capacity = this->capacity();
|
||||
std::size_t new_capacity = old_capacity + old_capacity / 2;
|
||||
if (size > new_capacity) new_capacity = size;
|
||||
@ -1065,6 +1070,11 @@ It grisu_prettify(const char* digits, int size, int exp, It it,
|
||||
int num_zeros = (std::max)(params.num_digits - full_exp, 1);
|
||||
if (params.trailing_zeros) {
|
||||
*it++ = static_cast<Char>('.');
|
||||
#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
|
||||
if (num_zeros > 1000) {
|
||||
throw std::runtime_error("fuzz mode - avoiding excessive cpu use");
|
||||
}
|
||||
#endif
|
||||
it = std::fill_n(it, num_zeros, static_cast<Char>('0'));
|
||||
}
|
||||
} else if (full_exp > 0) {
|
||||
|
||||
279
include/fmt/safe-duration-cast.h
Normal file
279
include/fmt/safe-duration-cast.h
Normal file
@ -0,0 +1,279 @@
|
||||
/*
|
||||
* For conversion between std::chrono::durations without undefined
|
||||
* behaviour or erroneous results.
|
||||
* This is a stripped down version of duration_cast, for inclusion in fmt.
|
||||
* See https://github.com/pauldreik/safe_duration_cast
|
||||
*
|
||||
* Copyright Paul Dreik 2019
|
||||
*
|
||||
* This file is licensed under the fmt license, see format.h
|
||||
*/
|
||||
|
||||
#include <chrono>
|
||||
#include <cmath>
|
||||
#include <limits>
|
||||
#include <type_traits>
|
||||
|
||||
#include "format.h"
|
||||
|
||||
FMT_BEGIN_NAMESPACE
|
||||
|
||||
namespace safe_duration_cast {
|
||||
|
||||
/**
|
||||
* converts From to To, without loss. If the dynamic value of from
|
||||
* can't be converted to To without loss, ec is set.
|
||||
*/
|
||||
template <typename To, typename From,
|
||||
FMT_ENABLE_IF(!std::is_same<From, To>::value)>
|
||||
FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) {
|
||||
ec = 0;
|
||||
using F = std::numeric_limits<From>;
|
||||
using T = std::numeric_limits<To>;
|
||||
static_assert(F::is_integer, "From must be integral");
|
||||
static_assert(T::is_integer, "To must be integral");
|
||||
|
||||
if (F::is_signed == T::is_signed) {
|
||||
// A and B are both signed, or both unsigned.
|
||||
if (F::digits <= T::digits) {
|
||||
// From fits in To without any problem
|
||||
} else {
|
||||
// From does not always fit in To, resort to a dynamic check.
|
||||
if (from < T::min() || from > T::max()) {
|
||||
// outside range.
|
||||
ec = 1;
|
||||
return {};
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (F::is_signed && !T::is_signed) {
|
||||
// From may be negative, not allowed!
|
||||
if (from < 0) {
|
||||
ec = 1;
|
||||
return {};
|
||||
}
|
||||
|
||||
// From is positive. Can it always fit in To?
|
||||
if (F::digits <= T::digits) {
|
||||
// yes, From always fits in To.
|
||||
} else {
|
||||
// from may not fit in To, we have to do a dynamic check
|
||||
if (from > T::max()) {
|
||||
ec = 1;
|
||||
return {};
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (!F::is_signed && T::is_signed) {
|
||||
// can from be held in To?
|
||||
if (F::digits < T::digits) {
|
||||
// yes, From always fits in To.
|
||||
} else {
|
||||
// from may not fit in To, we have to do a dynamic check
|
||||
if (from > T::max()) {
|
||||
// outside range.
|
||||
ec = 1;
|
||||
return {};
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// reaching here means all is ok for lossless conversion.
|
||||
return static_cast<To>(from);
|
||||
|
||||
} // function
|
||||
|
||||
template <typename To, typename From,
|
||||
FMT_ENABLE_IF(std::is_same<From, To>::value)>
|
||||
FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) {
|
||||
ec = 0;
|
||||
return from;
|
||||
} // function
|
||||
|
||||
// clang-format off
|
||||
/**
|
||||
* converts From to To if possible, otherwise ec is set.
|
||||
*
|
||||
* input | output
|
||||
* ---------------------------------|---------------
|
||||
* NaN | NaN
|
||||
* Inf | Inf
|
||||
* normal, fits in output | converted (possibly lossy)
|
||||
* normal, does not fit in output | ec is set
|
||||
* subnormal | best effort
|
||||
* -Inf | -Inf
|
||||
*/
|
||||
// clang-format on
|
||||
template <typename To, typename From,
|
||||
FMT_ENABLE_IF(!std::is_same<From, To>::value)>
|
||||
FMT_CONSTEXPR To safe_float_conversion(const From from, int& ec) {
|
||||
ec = 0;
|
||||
using T = std::numeric_limits<To>;
|
||||
static_assert(std::is_floating_point<From>::value, "From must be floating");
|
||||
static_assert(std::is_floating_point<To>::value, "To must be floating");
|
||||
|
||||
// catch the only happy case
|
||||
if (std::isfinite(from)) {
|
||||
if (from >= T::lowest() && from <= T::max()) {
|
||||
return static_cast<To>(from);
|
||||
}
|
||||
// not within range.
|
||||
ec = 1;
|
||||
return {};
|
||||
}
|
||||
|
||||
// nan and inf will be preserved
|
||||
return static_cast<To>(from);
|
||||
} // function
|
||||
|
||||
template <typename To, typename From,
|
||||
FMT_ENABLE_IF(std::is_same<From, To>::value)>
|
||||
FMT_CONSTEXPR To safe_float_conversion(const From from, int& ec) {
|
||||
ec = 0;
|
||||
static_assert(std::is_floating_point<From>::value, "From must be floating");
|
||||
return from;
|
||||
}
|
||||
|
||||
/**
|
||||
* safe duration cast between integral durations
|
||||
*/
|
||||
template <typename To, typename FromRep, typename FromPeriod,
|
||||
FMT_ENABLE_IF(std::is_integral<FromRep>::value),
|
||||
FMT_ENABLE_IF(std::is_integral<typename To::rep>::value)>
|
||||
To safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from,
|
||||
int& ec) {
|
||||
using From = std::chrono::duration<FromRep, FromPeriod>;
|
||||
ec = 0;
|
||||
// the basic idea is that we need to convert from count() in the from type
|
||||
// to count() in the To type, by multiplying it with this:
|
||||
using Factor = std::ratio_divide<typename From::period, typename To::period>;
|
||||
|
||||
static_assert(Factor::num > 0, "num must be positive");
|
||||
static_assert(Factor::den > 0, "den must be positive");
|
||||
|
||||
// the conversion is like this: multiply from.count() with Factor::num
|
||||
// /Factor::den and convert it to To::rep, all this without
|
||||
// overflow/underflow. let's start by finding a suitable type that can hold
|
||||
// both To, From and Factor::num
|
||||
using IntermediateRep =
|
||||
typename std::common_type<typename From::rep, typename To::rep,
|
||||
decltype(Factor::num)>::type;
|
||||
|
||||
// safe conversion to IntermediateRep
|
||||
IntermediateRep count =
|
||||
lossless_integral_conversion<IntermediateRep>(from.count(), ec);
|
||||
if (ec) {
|
||||
return {};
|
||||
}
|
||||
// multiply with Factor::num without overflow or underflow
|
||||
if (Factor::num != 1) {
|
||||
constexpr auto max1 =
|
||||
std::numeric_limits<IntermediateRep>::max() / Factor::num;
|
||||
if (count > max1) {
|
||||
ec = 1;
|
||||
return {};
|
||||
}
|
||||
constexpr auto min1 =
|
||||
std::numeric_limits<IntermediateRep>::min() / Factor::num;
|
||||
if (count < min1) {
|
||||
ec = 1;
|
||||
return {};
|
||||
}
|
||||
count *= Factor::num;
|
||||
}
|
||||
|
||||
// this can't go wrong, right? den>0 is checked earlier.
|
||||
if (Factor::den != 1) {
|
||||
count /= Factor::den;
|
||||
}
|
||||
// convert to the to type, safely
|
||||
using ToRep = typename To::rep;
|
||||
const ToRep tocount = lossless_integral_conversion<ToRep>(count, ec);
|
||||
if (ec) {
|
||||
return {};
|
||||
}
|
||||
return To{tocount};
|
||||
}
|
||||
|
||||
/**
|
||||
* safe duration_cast between floating point durations
|
||||
*/
|
||||
template <typename To, typename FromRep, typename FromPeriod,
|
||||
FMT_ENABLE_IF(std::is_floating_point<FromRep>::value),
|
||||
FMT_ENABLE_IF(std::is_floating_point<typename To::rep>::value)>
|
||||
To safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from,
|
||||
int& ec) {
|
||||
using From = std::chrono::duration<FromRep, FromPeriod>;
|
||||
ec = 0;
|
||||
if (std::isnan(from.count())) {
|
||||
// nan in, gives nan out. easy.
|
||||
return To{std::numeric_limits<typename To::rep>::quiet_NaN()};
|
||||
}
|
||||
// maybe we should also check if from is denormal, and decide what to do about
|
||||
// it.
|
||||
|
||||
// +-inf should be preserved.
|
||||
if (std::isinf(from.count())) {
|
||||
return To{from.count()};
|
||||
}
|
||||
|
||||
// the basic idea is that we need to convert from count() in the from type
|
||||
// to count() in the To type, by multiplying it with this:
|
||||
using Factor = std::ratio_divide<typename From::period, typename To::period>;
|
||||
|
||||
static_assert(Factor::num > 0, "num must be positive");
|
||||
static_assert(Factor::den > 0, "den must be positive");
|
||||
|
||||
// the conversion is like this: multiply from.count() with Factor::num
|
||||
// /Factor::den and convert it to To::rep, all this without
|
||||
// overflow/underflow. let's start by finding a suitable type that can hold
|
||||
// both To, From and Factor::num
|
||||
using IntermediateRep =
|
||||
typename std::common_type<typename From::rep, typename To::rep,
|
||||
decltype(Factor::num)>::type;
|
||||
|
||||
// force conversion of From::rep -> IntermediateRep to be safe,
|
||||
// even if it will never happen be narrowing in this context.
|
||||
IntermediateRep count =
|
||||
safe_float_conversion<IntermediateRep>(from.count(), ec);
|
||||
if (ec) {
|
||||
return {};
|
||||
}
|
||||
|
||||
// multiply with Factor::num without overflow or underflow
|
||||
if (Factor::num != 1) {
|
||||
constexpr auto max1 =
|
||||
std::numeric_limits<IntermediateRep>::max() / Factor::num;
|
||||
if (count > max1) {
|
||||
ec = 1;
|
||||
return {};
|
||||
}
|
||||
constexpr auto min1 =
|
||||
std::numeric_limits<IntermediateRep>::lowest() / Factor::num;
|
||||
if (count < min1) {
|
||||
ec = 1;
|
||||
return {};
|
||||
}
|
||||
count *= Factor::num;
|
||||
}
|
||||
|
||||
// this can't go wrong, right? den>0 is checked earlier.
|
||||
if (Factor::den != 1) {
|
||||
count /= Factor::den;
|
||||
}
|
||||
|
||||
// convert to the to type, safely
|
||||
using ToRep = typename To::rep;
|
||||
|
||||
const ToRep tocount = safe_float_conversion<ToRep>(count, ec);
|
||||
if (ec) {
|
||||
return {};
|
||||
}
|
||||
return To{tocount};
|
||||
}
|
||||
|
||||
} // namespace safe_duration_cast
|
||||
|
||||
FMT_END_NAMESPACE
|
||||
@ -83,19 +83,24 @@ install_dir = os.path.join(fmt_dir, "_install")
|
||||
build_dir = os.path.join(fmt_dir, "_build")
|
||||
test_build_dir = os.path.join(fmt_dir, "_build_test")
|
||||
|
||||
# Configure library.
|
||||
# Configure the library.
|
||||
makedirs_if_not_exist(build_dir)
|
||||
cmake_flags = [
|
||||
'-DCMAKE_INSTALL_PREFIX=' + install_dir, '-DCMAKE_BUILD_TYPE=' + build,
|
||||
'-DCMAKE_CXX_STANDARD=' + standard
|
||||
]
|
||||
|
||||
# make sure the fuzzers still compile
|
||||
if 'ENABLE_FUZZING' in os.environ:
|
||||
cmake_flags += ['-DFMT_FUZZ=ON', '-DFMT_FUZZ_LINKMAIN=On']
|
||||
|
||||
check_call(['cmake', '-DFMT_DOC=OFF', '-DFMT_PEDANTIC=ON', '-DFMT_WERROR=ON', fmt_dir] +
|
||||
cmake_flags, cwd=build_dir)
|
||||
|
||||
# Build library.
|
||||
check_call(['make', '-j4'], cwd=build_dir)
|
||||
# Build the library.
|
||||
check_call(['cmake', '--build','.'], cwd=build_dir)
|
||||
|
||||
# Test library.
|
||||
# Test the library.
|
||||
env = os.environ.copy()
|
||||
env['CTEST_OUTPUT_ON_FAILURE'] = '1'
|
||||
if call(['make', 'test'], env=env, cwd=build_dir):
|
||||
@ -103,7 +108,7 @@ if call(['make', 'test'], env=env, cwd=build_dir):
|
||||
print(f.read())
|
||||
sys.exit(-1)
|
||||
|
||||
# Install library.
|
||||
# Install the library.
|
||||
check_call(['make', 'install'], cwd=build_dir)
|
||||
|
||||
# Test installation.
|
||||
|
||||
@ -327,7 +327,7 @@ TEST(ChronoTest, SpecialDurations) {
|
||||
fmt::format("{:%S}", std::chrono::duration<double>(1e20)).substr(0, 3));
|
||||
auto nan = std::numeric_limits<double>::quiet_NaN();
|
||||
EXPECT_EQ(
|
||||
"nan nan nan nan.nan nan:nan nan",
|
||||
"nan nan nan nan nan:nan nan",
|
||||
fmt::format("{:%I %H %M %S %R %r}", std::chrono::duration<double>(nan)));
|
||||
fmt::format("{:%S}",
|
||||
std::chrono::duration<float, std::atto>(1.79400457e+31f));
|
||||
|
||||
3
test/fuzzing/.gitignore
vendored
Normal file
3
test/fuzzing/.gitignore
vendored
Normal file
@ -0,0 +1,3 @@
|
||||
# ignore artifacts from the build.sh script
|
||||
build-*/
|
||||
|
||||
38
test/fuzzing/CMakeLists.txt
Normal file
38
test/fuzzing/CMakeLists.txt
Normal file
@ -0,0 +1,38 @@
|
||||
# Copyright (c) 2019, Paul Dreik
|
||||
# License: see LICENSE.rst in the fmt root directory
|
||||
|
||||
# settings this links in a main. useful for reproducing,
|
||||
# kcov, gdb, afl, valgrind.
|
||||
# (note that libFuzzer can also reproduce, just pass it the files)
|
||||
option(FMT_FUZZ_LINKMAIN "enables the reproduce mode, instead of libFuzzer" On)
|
||||
|
||||
#for oss-fuzz - insert $LIB_FUZZING_ENGINE into the link flags, but only for
|
||||
#the fuzz targets, otherwise the cmake configuration step fails.
|
||||
set(FMT_FUZZ_LDFLAGS "" CACHE STRING "LDFLAGS for the fuzz targets")
|
||||
|
||||
#find all fuzzers.
|
||||
set(SOURCES
|
||||
chrono_duration.cpp
|
||||
named_arg.cpp
|
||||
one_arg.cpp
|
||||
sprintf.cpp
|
||||
two_args.cpp
|
||||
)
|
||||
|
||||
macro(implement_fuzzer sourcefile)
|
||||
get_filename_component(basename ${sourcefile} NAME_WE)
|
||||
set(name fuzzer_${basename})
|
||||
add_executable(${name} ${sourcefile} fuzzer_common.h)
|
||||
if(FMT_FUZZ_LINKMAIN)
|
||||
target_sources(${name} PRIVATE main.cpp)
|
||||
endif()
|
||||
target_link_libraries(${name} PRIVATE fmt)
|
||||
if(FMT_FUZZ_LDFLAGS)
|
||||
target_link_libraries(${name} PRIVATE ${FMT_FUZZ_LDFLAGS})
|
||||
endif()
|
||||
target_compile_features(${name} PRIVATE cxx_generic_lambdas)
|
||||
endmacro()
|
||||
|
||||
foreach(X IN ITEMS ${SOURCES})
|
||||
implement_fuzzer(${X})
|
||||
endforeach()
|
||||
34
test/fuzzing/README.md
Normal file
34
test/fuzzing/README.md
Normal file
@ -0,0 +1,34 @@
|
||||
# FMT Fuzzer
|
||||
Fuzzing has revealed [several bugs](https://github.com/fmtlib/fmt/issues?&q=is%3Aissue+fuzz) in fmt. It is a part of the continous fuzzing at [oss-fuzz](https://github.com/google/oss-fuzz)
|
||||
|
||||
The source code is modified to make the fuzzing possible without locking up on resource exhaustion:
|
||||
```cpp
|
||||
#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
|
||||
if(spec.precision>100000) {
|
||||
throw std::runtime_error("fuzz mode - avoiding large precision");
|
||||
}
|
||||
#endif
|
||||
```
|
||||
This macro is the defacto standard for making fuzzing practically possible, see [the libFuzzer documentation](https://llvm.org/docs/LibFuzzer.html#fuzzer-friendly-build-mode).
|
||||
|
||||
## Running the fuzzers locally
|
||||
There is a [helper script](build.sh) to build the fuzzers, which has only been tested on Debian and Ubuntu linux so far. There should be no problems fuzzing on Windows (using clang>=8) or on Mac, but the script will probably not work out of the box.
|
||||
|
||||
Something along
|
||||
```sh
|
||||
mkdir build
|
||||
cd build
|
||||
export CXX=clang++
|
||||
export CXXFLAGS="-fsanitize=fuzzer-no-link -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION= -g"
|
||||
cmake .. -DFMT_SAFE_DURATION_CAST=On -DFMT_FUZZ=On -DFMT_FUZZ_LINKMAIN=Off -DFMT_FUZZ_LDFLAGS="-fsanitize=fuzzer"
|
||||
cmake --build .
|
||||
```
|
||||
should work to build the fuzzers for all platforms which clang supports.
|
||||
|
||||
Execute a fuzzer with for instance
|
||||
```sh
|
||||
cd build
|
||||
export UBSAN_OPTIONS=halt_on_error=1
|
||||
mkdir out_chrono
|
||||
bin/fuzzer_chrono_duration out_chrono
|
||||
```
|
||||
110
test/fuzzing/build.sh
Executable file
110
test/fuzzing/build.sh
Executable file
@ -0,0 +1,110 @@
|
||||
#!/bin/sh
|
||||
#
|
||||
# Creates fuzzer builds of various kinds
|
||||
# - reproduce mode (no fuzzing, just enables replaying data through the fuzzers)
|
||||
# - oss-fuzz emulated mode (makes sure a simulated invocation by oss-fuzz works)
|
||||
# - libFuzzer build (you will need clang)
|
||||
# - afl build (you will need afl)
|
||||
#
|
||||
#
|
||||
# Copyright (c) 2019 Paul Dreik
|
||||
#
|
||||
# License: see LICENSE.rst in the fmt root directory
|
||||
|
||||
set -e
|
||||
me=$(basename $0)
|
||||
root=$(readlink -f "$(dirname "$0")/../..")
|
||||
|
||||
|
||||
echo $me: root=$root
|
||||
|
||||
here=$(pwd)
|
||||
|
||||
CXXFLAGSALL="-DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION= -g"
|
||||
CMAKEFLAGSALL="$root -GNinja -DCMAKE_BUILD_TYPE=Debug -DFMT_DOC=Off -DFMT_TEST=Off -DFMT_FUZZ=On -DCMAKE_CXX_STANDARD=17"
|
||||
|
||||
#builds the fuzzers as one would do if using afl or just making
|
||||
#binaries for reproducing.
|
||||
builddir=$here/build-fuzzers-reproduce
|
||||
mkdir -p $builddir
|
||||
cd $builddir
|
||||
CXX="ccache g++" CXXFLAGS="$CXXFLAGSALL" cmake \
|
||||
$CMAKEFLAGSALL
|
||||
cmake --build $builddir
|
||||
|
||||
#for performance analysis of the fuzzers
|
||||
builddir=$here/build-fuzzers-perfanalysis
|
||||
mkdir -p $builddir
|
||||
cd $builddir
|
||||
CXX="ccache g++" CXXFLAGS="$CXXFLAGSALL -g" cmake \
|
||||
$CMAKEFLAGSALL \
|
||||
-DFMT_FUZZ_LINKMAIN=On \
|
||||
-DCMAKE_BUILD_TYPE=Release
|
||||
|
||||
cmake --build $builddir
|
||||
|
||||
#builds the fuzzers as oss-fuzz does
|
||||
builddir=$here/build-fuzzers-ossfuzz
|
||||
mkdir -p $builddir
|
||||
cd $builddir
|
||||
CXX="clang++" \
|
||||
CXXFLAGS="$CXXFLAGSALL -fsanitize=fuzzer-no-link" cmake \
|
||||
cmake $CMAKEFLAGSALL \
|
||||
-DFMT_FUZZ_LINKMAIN=Off \
|
||||
-DFMT_FUZZ_LDFLAGS="-fsanitize=fuzzer"
|
||||
|
||||
cmake --build $builddir
|
||||
|
||||
|
||||
#builds fuzzers for local fuzzing with libfuzzer with asan+usan
|
||||
builddir=$here/build-fuzzers-libfuzzer
|
||||
mkdir -p $builddir
|
||||
cd $builddir
|
||||
CXX="clang++" \
|
||||
CXXFLAGS="$CXXFLAGSALL -fsanitize=fuzzer-no-link,address,undefined" cmake \
|
||||
cmake $CMAKEFLAGSALL \
|
||||
-DFMT_FUZZ_LINKMAIN=Off \
|
||||
-DFMT_FUZZ_LDFLAGS="-fsanitize=fuzzer"
|
||||
|
||||
cmake --build $builddir
|
||||
|
||||
#builds fuzzers for local fuzzing with libfuzzer with asan only
|
||||
builddir=$here/build-fuzzers-libfuzzer-addr
|
||||
mkdir -p $builddir
|
||||
cd $builddir
|
||||
CXX="clang++" \
|
||||
CXXFLAGS="$CXXFLAGSALL -fsanitize=fuzzer-no-link,undefined" cmake \
|
||||
cmake $CMAKEFLAGSALL \
|
||||
-DFMT_FUZZ_LINKMAIN=Off \
|
||||
-DFMT_FUZZ_LDFLAGS="-fsanitize=fuzzer"
|
||||
|
||||
cmake --build $builddir
|
||||
|
||||
#builds a fast fuzzer for making coverage fast
|
||||
builddir=$here/build-fuzzers-fast
|
||||
mkdir -p $builddir
|
||||
cd $builddir
|
||||
CXX="clang++" \
|
||||
CXXFLAGS="$CXXFLAGSALL -fsanitize=fuzzer-no-link -O3" cmake \
|
||||
cmake $CMAKEFLAGSALL \
|
||||
-DFMT_FUZZ_LINKMAIN=Off \
|
||||
-DFMT_FUZZ_LDFLAGS="-fsanitize=fuzzer" \
|
||||
-DCMAKE_BUILD_TYPE=Release
|
||||
|
||||
cmake --build $builddir
|
||||
|
||||
|
||||
#builds fuzzers for local fuzzing with afl
|
||||
builddir=$here/build-fuzzers-afl
|
||||
mkdir -p $builddir
|
||||
cd $builddir
|
||||
CXX="afl-g++" \
|
||||
CXXFLAGS="$CXXFLAGSALL -fsanitize=address,undefined" \
|
||||
cmake $CMAKEFLAGSALL \
|
||||
-DFMT_FUZZ_LINKMAIN=On
|
||||
|
||||
cmake --build $builddir
|
||||
|
||||
|
||||
echo $me: all good
|
||||
|
||||
152
test/fuzzing/chrono_duration.cpp
Normal file
152
test/fuzzing/chrono_duration.cpp
Normal file
@ -0,0 +1,152 @@
|
||||
// Copyright (c) 2019, Paul Dreik
|
||||
// License: see LICENSE.rst in the fmt root directory
|
||||
|
||||
#include <fmt/chrono.h>
|
||||
#include <cstdint>
|
||||
#include <limits>
|
||||
#include <stdexcept>
|
||||
#include <type_traits>
|
||||
#include <vector>
|
||||
#include "fuzzer_common.h"
|
||||
|
||||
template <typename Item, typename Ratio>
|
||||
void invoke_inner(fmt::string_view formatstring, const Item item) {
|
||||
const std::chrono::duration<Item, Ratio> value(item);
|
||||
try {
|
||||
#if FMT_FUZZ_FORMAT_TO_STRING
|
||||
std::string message = fmt::format(formatstring, value);
|
||||
#else
|
||||
fmt::memory_buffer buf;
|
||||
fmt::format_to(buf, formatstring, value);
|
||||
#endif
|
||||
} catch (std::exception& /*e*/) {
|
||||
}
|
||||
}
|
||||
|
||||
// Item is the underlying type for duration (int, long etc)
|
||||
template <typename Item>
|
||||
void invoke_outer(const uint8_t* Data, std::size_t Size, const int scaling) {
|
||||
// always use a fixed location of the data
|
||||
using fmt_fuzzer::Nfixed;
|
||||
|
||||
constexpr auto N = sizeof(Item);
|
||||
static_assert(N <= Nfixed, "fixed size is too small");
|
||||
if (Size <= Nfixed + 1) {
|
||||
return;
|
||||
}
|
||||
|
||||
const Item item = fmt_fuzzer::assignFromBuf<Item>(Data);
|
||||
|
||||
// fast forward
|
||||
Data += Nfixed;
|
||||
Size -= Nfixed;
|
||||
|
||||
// Data is already allocated separately in libFuzzer so reading past
|
||||
// the end will most likely be detected anyway
|
||||
const auto formatstring = fmt::string_view(fmt_fuzzer::as_chars(Data), Size);
|
||||
|
||||
// doit_impl<Item,std::yocto>(buf.data(),item);
|
||||
// doit_impl<Item,std::zepto>(buf.data(),item);
|
||||
switch (scaling) {
|
||||
case 1:
|
||||
invoke_inner<Item, std::atto>(formatstring, item);
|
||||
break;
|
||||
case 2:
|
||||
invoke_inner<Item, std::femto>(formatstring, item);
|
||||
break;
|
||||
case 3:
|
||||
invoke_inner<Item, std::pico>(formatstring, item);
|
||||
break;
|
||||
case 4:
|
||||
invoke_inner<Item, std::nano>(formatstring, item);
|
||||
break;
|
||||
case 5:
|
||||
invoke_inner<Item, std::micro>(formatstring, item);
|
||||
break;
|
||||
case 6:
|
||||
invoke_inner<Item, std::milli>(formatstring, item);
|
||||
break;
|
||||
case 7:
|
||||
invoke_inner<Item, std::centi>(formatstring, item);
|
||||
break;
|
||||
case 8:
|
||||
invoke_inner<Item, std::deci>(formatstring, item);
|
||||
break;
|
||||
case 9:
|
||||
invoke_inner<Item, std::deca>(formatstring, item);
|
||||
break;
|
||||
case 10:
|
||||
invoke_inner<Item, std::kilo>(formatstring, item);
|
||||
break;
|
||||
case 11:
|
||||
invoke_inner<Item, std::mega>(formatstring, item);
|
||||
break;
|
||||
case 12:
|
||||
invoke_inner<Item, std::giga>(formatstring, item);
|
||||
break;
|
||||
case 13:
|
||||
invoke_inner<Item, std::tera>(formatstring, item);
|
||||
break;
|
||||
case 14:
|
||||
invoke_inner<Item, std::peta>(formatstring, item);
|
||||
break;
|
||||
case 15:
|
||||
invoke_inner<Item, std::exa>(formatstring, item);
|
||||
}
|
||||
// doit_impl<Item,std::zeta>(buf.data(),item);
|
||||
// doit_impl<Item,std::yotta>(buf.data(),item);
|
||||
}
|
||||
|
||||
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* Data, std::size_t Size) {
|
||||
if (Size <= 4) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
const auto representation = Data[0];
|
||||
const auto scaling = Data[1];
|
||||
Data += 2;
|
||||
Size -= 2;
|
||||
|
||||
switch (representation) {
|
||||
case 1:
|
||||
invoke_outer<char>(Data, Size, scaling);
|
||||
break;
|
||||
case 2:
|
||||
invoke_outer<unsigned char>(Data, Size, scaling);
|
||||
break;
|
||||
case 3:
|
||||
invoke_outer<signed char>(Data, Size, scaling);
|
||||
break;
|
||||
case 4:
|
||||
invoke_outer<short>(Data, Size, scaling);
|
||||
break;
|
||||
case 5:
|
||||
invoke_outer<unsigned short>(Data, Size, scaling);
|
||||
break;
|
||||
case 6:
|
||||
invoke_outer<int>(Data, Size, scaling);
|
||||
break;
|
||||
case 7:
|
||||
invoke_outer<unsigned int>(Data, Size, scaling);
|
||||
break;
|
||||
case 8:
|
||||
invoke_outer<long>(Data, Size, scaling);
|
||||
break;
|
||||
case 9:
|
||||
invoke_outer<unsigned long>(Data, Size, scaling);
|
||||
break;
|
||||
case 10:
|
||||
invoke_outer<float>(Data, Size, scaling);
|
||||
break;
|
||||
case 11:
|
||||
invoke_outer<double>(Data, Size, scaling);
|
||||
break;
|
||||
case 12:
|
||||
invoke_outer<long double>(Data, Size, scaling);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
71
test/fuzzing/fuzzer_common.h
Normal file
71
test/fuzzing/fuzzer_common.h
Normal file
@ -0,0 +1,71 @@
|
||||
#ifndef FUZZER_COMMON_H
|
||||
#define FUZZER_COMMON_H
|
||||
|
||||
// Copyright (c) 2019, Paul Dreik
|
||||
// License: see LICENSE.rst in the fmt root directory
|
||||
|
||||
#include <cstring> // memcpy
|
||||
#include <type_traits> // trivially copyable
|
||||
#include <cstdint> // std::uint8_t
|
||||
|
||||
// one can format to either a string, or a buf. buf is faster,
|
||||
// but one may be interested in formatting to a string instead to
|
||||
// verify it works as intended. to avoid a combinatoric explosion,
|
||||
// select this at compile time instead of dynamically from the fuzz data
|
||||
#define FMT_FUZZ_FORMAT_TO_STRING 0
|
||||
|
||||
// if fmt is given a buffer that is separately allocated,
|
||||
// chances that address sanitizer detects out of bound reads is
|
||||
// much higher. However, it slows down the fuzzing.
|
||||
#define FMT_FUZZ_SEPARATE_ALLOCATION 1
|
||||
|
||||
// To let the the fuzzer mutation be efficient at cross pollinating
|
||||
// between different types, use a fixed size format.
|
||||
// The same bit pattern, interpreted as another type,
|
||||
// is likely interesting.
|
||||
// For this, we must know the size of the largest possible type in use.
|
||||
|
||||
// There are some problems on travis, claiming Nfixed is not a constant expression
|
||||
// which seems to be an issue with older versions of libstdc++
|
||||
#if _GLIBCXX_RELEASE >= 7
|
||||
# include <algorithm>
|
||||
namespace fmt_fuzzer {
|
||||
constexpr auto Nfixed = std::max(sizeof(long double), sizeof(std::intmax_t));
|
||||
}
|
||||
#else
|
||||
namespace fmt_fuzzer {
|
||||
constexpr auto Nfixed=16;
|
||||
}
|
||||
#endif
|
||||
|
||||
namespace fmt_fuzzer {
|
||||
// view data as a c char pointer.
|
||||
template <typename T>
|
||||
inline const char* as_chars(const T* data) {
|
||||
return static_cast<const char*>(static_cast<const void*>(data));
|
||||
}
|
||||
|
||||
// view data as a byte pointer
|
||||
template <typename T>
|
||||
inline const std::uint8_t* as_bytes(const T* data) {
|
||||
return static_cast<const std::uint8_t*>(static_cast<const void*>(data));
|
||||
}
|
||||
|
||||
// blits bytes from Data to form an (assumed trivially constructible) object
|
||||
// of type Item
|
||||
template <class Item>
|
||||
inline Item assignFromBuf(const std::uint8_t* Data) {
|
||||
Item item{};
|
||||
std::memcpy(&item, Data, sizeof(Item));
|
||||
return item;
|
||||
}
|
||||
|
||||
// reads a boolean value by looking at the first byte from Data
|
||||
template <> inline bool assignFromBuf<bool>(const std::uint8_t* Data) {
|
||||
return !!Data[0];
|
||||
}
|
||||
|
||||
} // namespace fmt_fuzzer
|
||||
|
||||
|
||||
#endif // FUZZER_COMMON_H
|
||||
21
test/fuzzing/main.cpp
Normal file
21
test/fuzzing/main.cpp
Normal file
@ -0,0 +1,21 @@
|
||||
#include <cassert>
|
||||
#include <fstream>
|
||||
#include <sstream>
|
||||
#include <vector>
|
||||
#include "fuzzer_common.h"
|
||||
|
||||
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* Data, std::size_t Size);
|
||||
int main(int argc, char* argv[]) {
|
||||
for (int i = 1; i < argc; ++i) {
|
||||
std::ifstream in(argv[i]);
|
||||
assert(in);
|
||||
in.seekg(0, std::ios_base::end);
|
||||
const auto pos = in.tellg();
|
||||
assert(pos>=0);
|
||||
in.seekg(0, std::ios_base::beg);
|
||||
std::vector<char> buf(static_cast<std::size_t>(pos));
|
||||
in.read(buf.data(), static_cast<long>(buf.size()));
|
||||
assert(in.gcount() == pos);
|
||||
LLVMFuzzerTestOneInput(fmt_fuzzer::as_bytes(buf.data()), buf.size());
|
||||
}
|
||||
}
|
||||
129
test/fuzzing/named_arg.cpp
Normal file
129
test/fuzzing/named_arg.cpp
Normal file
@ -0,0 +1,129 @@
|
||||
// Copyright (c) 2019, Paul Dreik
|
||||
// License: see LICENSE.rst in the fmt root directory
|
||||
|
||||
#include <fmt/chrono.h>
|
||||
#include <fmt/core.h>
|
||||
#include <cstdint>
|
||||
#include <stdexcept>
|
||||
#include <type_traits>
|
||||
#include <vector>
|
||||
#include "fuzzer_common.h"
|
||||
|
||||
template <typename Item1>
|
||||
void invoke_fmt(const uint8_t* Data, std::size_t Size, unsigned int argsize) {
|
||||
constexpr auto N1 = sizeof(Item1);
|
||||
static_assert (N1<=fmt_fuzzer::Nfixed,"Nfixed too small");
|
||||
if (Size <= fmt_fuzzer::Nfixed) {
|
||||
return;
|
||||
}
|
||||
const Item1 item1 = fmt_fuzzer::assignFromBuf<Item1>(Data);
|
||||
|
||||
Data += fmt_fuzzer::Nfixed;
|
||||
Size -= fmt_fuzzer::Nfixed;
|
||||
|
||||
// how many chars should be used for the argument name?
|
||||
if (argsize <= 0 || argsize >= Size) {
|
||||
return;
|
||||
}
|
||||
|
||||
// allocating buffers separately is slower, but increases chances
|
||||
// of detecting memory errors
|
||||
#if FMT_FUZZ_SEPARATE_ALLOCATION
|
||||
std::vector<char> argnamebuffer(argsize);
|
||||
std::memcpy(argnamebuffer.data(), Data, argsize);
|
||||
auto argname = fmt::string_view(argnamebuffer.data(), argsize);
|
||||
#else
|
||||
auto argname = fmt::string_view(fmt_fuzzer::as_chars(Data), argsize);
|
||||
#endif
|
||||
Data += argsize;
|
||||
Size -= argsize;
|
||||
|
||||
#if FMT_FUZZ_SEPARATE_ALLOCATION
|
||||
// allocates as tight as possible, making it easier to catch buffer overruns.
|
||||
std::vector<char> fmtstringbuffer(Size);
|
||||
std::memcpy(fmtstringbuffer.data(), Data, Size);
|
||||
auto fmtstring = fmt::string_view(fmtstringbuffer.data(), Size);
|
||||
#else
|
||||
auto fmtstring = fmt::string_view(fmt_fuzzer::as_chars(Data), Size);
|
||||
#endif
|
||||
|
||||
#if FMT_FUZZ_FORMAT_TO_STRING
|
||||
std::string message = fmt::format(fmtstring, fmt::arg(argname, item1));
|
||||
#else
|
||||
fmt::memory_buffer outbuf;
|
||||
fmt::format_to(outbuf, fmtstring, fmt::arg(argname, item1));
|
||||
#endif
|
||||
}
|
||||
|
||||
// for dynamic dispatching to an explicit instantiation
|
||||
template <typename Callback> void invoke(int index, Callback callback) {
|
||||
switch (index) {
|
||||
case 0:
|
||||
callback(bool{});
|
||||
break;
|
||||
case 1:
|
||||
callback(char{});
|
||||
break;
|
||||
case 2:
|
||||
using sc = signed char;
|
||||
callback(sc{});
|
||||
break;
|
||||
case 3:
|
||||
using uc = unsigned char;
|
||||
callback(uc{});
|
||||
break;
|
||||
case 4:
|
||||
callback(short{});
|
||||
break;
|
||||
case 5:
|
||||
using us = unsigned short;
|
||||
callback(us{});
|
||||
break;
|
||||
case 6:
|
||||
callback(int{});
|
||||
break;
|
||||
case 7:
|
||||
callback(unsigned{});
|
||||
break;
|
||||
case 8:
|
||||
callback(long{});
|
||||
break;
|
||||
case 9:
|
||||
using ul = unsigned long;
|
||||
callback(ul{});
|
||||
break;
|
||||
case 10:
|
||||
callback(float{});
|
||||
break;
|
||||
case 11:
|
||||
callback(double{});
|
||||
break;
|
||||
case 12:
|
||||
using LD = long double;
|
||||
callback(LD{});
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* Data, std::size_t Size) {
|
||||
if (Size <= 3) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
// switch types depending on the first byte of the input
|
||||
const auto first = Data[0] & 0x0F;
|
||||
const unsigned int second = (Data[0] & 0xF0) >> 4;
|
||||
Data++;
|
||||
Size--;
|
||||
|
||||
auto outerfcn = [=](auto param1) {
|
||||
invoke_fmt<decltype(param1)>(Data, Size, second);
|
||||
};
|
||||
|
||||
try {
|
||||
invoke(first, outerfcn);
|
||||
} catch (std::exception& /*e*/) {
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
131
test/fuzzing/one_arg.cpp
Normal file
131
test/fuzzing/one_arg.cpp
Normal file
@ -0,0 +1,131 @@
|
||||
// Copyright (c) 2019, Paul Dreik
|
||||
// License: see LICENSE.rst in the fmt root directory
|
||||
|
||||
#include <fmt/core.h>
|
||||
#include <cstdint>
|
||||
#include <stdexcept>
|
||||
#include <type_traits>
|
||||
#include <vector>
|
||||
|
||||
#include <fmt/chrono.h>
|
||||
#include "fuzzer_common.h"
|
||||
|
||||
using fmt_fuzzer::Nfixed;
|
||||
|
||||
template <typename Item>
|
||||
void invoke_fmt(const uint8_t* Data, std::size_t Size) {
|
||||
constexpr auto N = sizeof(Item);
|
||||
static_assert (N<=Nfixed,"Nfixed is too small");
|
||||
if (Size <= Nfixed) {
|
||||
return;
|
||||
}
|
||||
const Item item = fmt_fuzzer::assignFromBuf<Item>(Data);
|
||||
Data += Nfixed;
|
||||
Size -= Nfixed;
|
||||
|
||||
#if FMT_FUZZ_SEPARATE_ALLOCATION
|
||||
// allocates as tight as possible, making it easier to catch buffer overruns.
|
||||
std::vector<char> fmtstringbuffer(Size);
|
||||
std::memcpy(fmtstringbuffer.data(), Data, Size);
|
||||
auto fmtstring = fmt::string_view(fmtstringbuffer.data(), Size);
|
||||
#else
|
||||
auto fmtstring = fmt::string_view(fmt_fuzzer::as_chars(Data), Size);
|
||||
#endif
|
||||
|
||||
#if FMT_FUZZ_FORMAT_TO_STRING
|
||||
std::string message = fmt::format(fmtstring, item);
|
||||
#else
|
||||
fmt::memory_buffer message;
|
||||
fmt::format_to(message, fmtstring, item);
|
||||
#endif
|
||||
}
|
||||
|
||||
void invoke_fmt_time(const uint8_t* Data, std::size_t Size) {
|
||||
using Item = std::time_t;
|
||||
constexpr auto N = sizeof(Item);
|
||||
static_assert (N<=Nfixed,"Nfixed too small");
|
||||
if (Size <= Nfixed) {
|
||||
return;
|
||||
}
|
||||
const Item item = fmt_fuzzer::assignFromBuf<Item>(Data);
|
||||
Data += Nfixed;
|
||||
Size -= Nfixed;
|
||||
#if FMT_FUZZ_SEPARATE_ALLOCATION
|
||||
// allocates as tight as possible, making it easier to catch buffer overruns.
|
||||
std::vector<char> fmtstringbuffer(Size);
|
||||
std::memcpy(fmtstringbuffer.data(), Data, Size);
|
||||
auto fmtstring = fmt::string_view(fmtstringbuffer.data(), Size);
|
||||
#else
|
||||
auto fmtstring = fmt::string_view(fmt_fuzzer::as_chars(Data), Size);
|
||||
#endif
|
||||
auto* b = std::localtime(&item);
|
||||
if (b) {
|
||||
#if FMT_FUZZ_FORMAT_TO_STRING
|
||||
std::string message = fmt::format(fmtstring, *b);
|
||||
#else
|
||||
fmt::memory_buffer message;
|
||||
fmt::format_to(message, fmtstring, *b);
|
||||
#endif
|
||||
}
|
||||
}
|
||||
|
||||
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* Data, std::size_t Size) {
|
||||
if (Size <= 3) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
const auto first = Data[0];
|
||||
Data++;
|
||||
Size--;
|
||||
|
||||
try {
|
||||
switch (first) {
|
||||
case 0:
|
||||
invoke_fmt<bool>(Data, Size);
|
||||
break;
|
||||
case 1:
|
||||
invoke_fmt<char>(Data, Size);
|
||||
break;
|
||||
case 2:
|
||||
invoke_fmt<unsigned char>(Data, Size);
|
||||
break;
|
||||
case 3:
|
||||
invoke_fmt<signed char>(Data, Size);
|
||||
break;
|
||||
case 4:
|
||||
invoke_fmt<short>(Data, Size);
|
||||
break;
|
||||
case 5:
|
||||
invoke_fmt<unsigned short>(Data, Size);
|
||||
break;
|
||||
case 6:
|
||||
invoke_fmt<int>(Data, Size);
|
||||
break;
|
||||
case 7:
|
||||
invoke_fmt<unsigned int>(Data, Size);
|
||||
break;
|
||||
case 8:
|
||||
invoke_fmt<long>(Data, Size);
|
||||
break;
|
||||
case 9:
|
||||
invoke_fmt<unsigned long>(Data, Size);
|
||||
break;
|
||||
case 10:
|
||||
invoke_fmt<float>(Data, Size);
|
||||
break;
|
||||
case 11:
|
||||
invoke_fmt<double>(Data, Size);
|
||||
break;
|
||||
case 12:
|
||||
invoke_fmt<long double>(Data, Size);
|
||||
break;
|
||||
case 13:
|
||||
invoke_fmt_time(Data, Size);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
} catch (std::exception& /*e*/) {
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
116
test/fuzzing/sprintf.cpp
Normal file
116
test/fuzzing/sprintf.cpp
Normal file
@ -0,0 +1,116 @@
|
||||
// Copyright (c) 2019, Paul Dreik
|
||||
// License: see LICENSE.rst in the fmt root directory
|
||||
#include <fmt/format.h>
|
||||
#include <fmt/printf.h>
|
||||
#include <cstdint>
|
||||
#include <stdexcept>
|
||||
|
||||
#include "fuzzer_common.h"
|
||||
|
||||
using fmt_fuzzer::Nfixed;
|
||||
|
||||
template <typename Item1, typename Item2>
|
||||
void invoke_fmt(const uint8_t* Data, std::size_t Size) {
|
||||
constexpr auto N1 = sizeof(Item1);
|
||||
constexpr auto N2 = sizeof(Item2);
|
||||
static_assert(N1 <= Nfixed, "size1 exceeded");
|
||||
static_assert(N2 <= Nfixed, "size2 exceeded");
|
||||
if (Size <= Nfixed + Nfixed) {
|
||||
return;
|
||||
}
|
||||
Item1 item1 = fmt_fuzzer::assignFromBuf<Item1>(Data);
|
||||
Data += Nfixed;
|
||||
Size -= Nfixed;
|
||||
|
||||
Item2 item2 = fmt_fuzzer::assignFromBuf<Item2>(Data);
|
||||
Data += Nfixed;
|
||||
Size -= Nfixed;
|
||||
|
||||
auto fmtstring = fmt::string_view(fmt_fuzzer::as_chars(Data), Size);
|
||||
|
||||
#if FMT_FUZZ_FORMAT_TO_STRING
|
||||
std::string message = fmt::format(fmtstring, item1, item2);
|
||||
#else
|
||||
fmt::memory_buffer message;
|
||||
fmt::format_to(message, fmtstring, item1, item2);
|
||||
#endif
|
||||
}
|
||||
|
||||
// for dynamic dispatching to an explicit instantiation
|
||||
template <typename Callback> void invoke(int index, Callback callback) {
|
||||
switch (index) {
|
||||
case 0:
|
||||
callback(bool{});
|
||||
break;
|
||||
case 1:
|
||||
callback(char{});
|
||||
break;
|
||||
case 2:
|
||||
using sc = signed char;
|
||||
callback(sc{});
|
||||
break;
|
||||
case 3:
|
||||
using uc = unsigned char;
|
||||
callback(uc{});
|
||||
break;
|
||||
case 4:
|
||||
callback(short{});
|
||||
break;
|
||||
case 5:
|
||||
using us = unsigned short;
|
||||
callback(us{});
|
||||
break;
|
||||
case 6:
|
||||
callback(int{});
|
||||
break;
|
||||
case 7:
|
||||
callback(unsigned{});
|
||||
break;
|
||||
case 8:
|
||||
callback(long{});
|
||||
break;
|
||||
case 9:
|
||||
using ul = unsigned long;
|
||||
callback(ul{});
|
||||
break;
|
||||
case 10:
|
||||
callback(float{});
|
||||
break;
|
||||
case 11:
|
||||
callback(double{});
|
||||
break;
|
||||
case 12:
|
||||
using LD = long double;
|
||||
callback(LD{});
|
||||
break;
|
||||
case 13:
|
||||
using ptr = void*;
|
||||
callback(ptr{});
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* Data, std::size_t Size) {
|
||||
if (Size <= 3) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
// switch types depending on the first byte of the input
|
||||
const auto first = Data[0] & 0x0F;
|
||||
const auto second = (Data[0] & 0xF0) >> 4;
|
||||
Data++;
|
||||
Size--;
|
||||
|
||||
auto outer = [=](auto param1) {
|
||||
auto inner = [=](auto param2) {
|
||||
invoke_fmt<decltype(param1), decltype(param2)>(Data, Size);
|
||||
};
|
||||
invoke(second, inner);
|
||||
};
|
||||
|
||||
try {
|
||||
invoke(first, outer);
|
||||
} catch (std::exception& /*e*/) {
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
112
test/fuzzing/two_args.cpp
Normal file
112
test/fuzzing/two_args.cpp
Normal file
@ -0,0 +1,112 @@
|
||||
// Copyright (c) 2019, Paul Dreik
|
||||
// License: see LICENSE.rst in the fmt root directory
|
||||
#include <fmt/format.h>
|
||||
#include <cstdint>
|
||||
#include <stdexcept>
|
||||
#include <type_traits>
|
||||
|
||||
#include "fuzzer_common.h"
|
||||
|
||||
constexpr auto Nfixed=fmt_fuzzer::Nfixed;
|
||||
|
||||
template <typename Item1, typename Item2>
|
||||
void invoke_fmt(const uint8_t* Data, std::size_t Size) {
|
||||
constexpr auto N1 = sizeof(Item1);
|
||||
constexpr auto N2 = sizeof(Item2);
|
||||
static_assert(N1 <= Nfixed, "size1 exceeded");
|
||||
static_assert(N2 <= Nfixed, "size2 exceeded");
|
||||
if (Size <= Nfixed + Nfixed) {
|
||||
return;
|
||||
}
|
||||
const Item1 item1=fmt_fuzzer::assignFromBuf<Item1>(Data);
|
||||
Data += Nfixed;
|
||||
Size -= Nfixed;
|
||||
|
||||
const Item2 item2=fmt_fuzzer::assignFromBuf<Item2>(Data);
|
||||
Data += Nfixed;
|
||||
Size -= Nfixed;
|
||||
|
||||
auto fmtstring = fmt::string_view(fmt_fuzzer::as_chars(Data), Size);
|
||||
|
||||
#if FMT_FUZZ_FORMAT_TO_STRING
|
||||
std::string message = fmt::format(fmtstring, item1, item2);
|
||||
#else
|
||||
fmt::memory_buffer message;
|
||||
fmt::format_to(message, fmtstring, item1, item2);
|
||||
#endif
|
||||
}
|
||||
|
||||
// for dynamic dispatching to an explicit instantiation
|
||||
template <typename Callback> void invoke(int index, Callback callback) {
|
||||
switch (index) {
|
||||
case 0:
|
||||
callback(bool{});
|
||||
break;
|
||||
case 1:
|
||||
callback(char{});
|
||||
break;
|
||||
case 2:
|
||||
using sc = signed char;
|
||||
callback(sc{});
|
||||
break;
|
||||
case 3:
|
||||
using uc = unsigned char;
|
||||
callback(uc{});
|
||||
break;
|
||||
case 4:
|
||||
callback(short{});
|
||||
break;
|
||||
case 5:
|
||||
using us = unsigned short;
|
||||
callback(us{});
|
||||
break;
|
||||
case 6:
|
||||
callback(int{});
|
||||
break;
|
||||
case 7:
|
||||
callback(unsigned{});
|
||||
break;
|
||||
case 8:
|
||||
callback(long{});
|
||||
break;
|
||||
case 9:
|
||||
using ul = unsigned long;
|
||||
callback(ul{});
|
||||
break;
|
||||
case 10:
|
||||
callback(float{});
|
||||
break;
|
||||
case 11:
|
||||
callback(double{});
|
||||
break;
|
||||
case 12:
|
||||
using LD = long double;
|
||||
callback(LD{});
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* Data, std::size_t Size) {
|
||||
if (Size <= 3) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
// switch types depending on the first byte of the input
|
||||
const auto first = Data[0] & 0x0F;
|
||||
const auto second = (Data[0] & 0xF0) >> 4;
|
||||
Data++;
|
||||
Size--;
|
||||
|
||||
auto outer = [=](auto param1) {
|
||||
auto inner = [=](auto param2) {
|
||||
invoke_fmt<decltype(param1), decltype(param2)>(Data, Size);
|
||||
};
|
||||
invoke(second, inner);
|
||||
};
|
||||
|
||||
try {
|
||||
invoke(first, outer);
|
||||
} catch (std::exception& /*e*/) {
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user