Echidna Files

Echidna 2.2.4 is an exciting release that brings a host of improvements in fuzzing speed and user experience. This update:

• Boosts performance through optimized shrinking and multicore fuzzing. Adjustments made to our multi-worker implementation will provide increased performance when multiple workers are in use, meaning you can now have a faster and more scalable fuzzing experience. Echidna will now by default run between one to four workers, based on the available CPU cores. While we have set an intelligent default logic, you can continue to manually control the number of workers with the workers config option or --workers CLI switch. Another welcome tweak is in the shrinking process where a single worker now handles a shrinking task to minimize contention.

• Enhances user interface with handy shortcuts, added metrics, more informative messages, and clearer error responses. The new shortcuts allow for swiftly toggling the visibility of the tests and log panels (t and l). The newly introduced performance metric gas/s should be a more user-friendly indicator of execution performance than its predecessor calls/s. Expect insightful time measurements when saving coverage and an added message upon saving reproducers. Last but not least, we improved the error messages in various conditions, for better clarity and ease of understanding.

• Adds initial support to TLOAD/TSTORE opcodes as we continue our work towards achieving full compatibility with Cancun. Note that other new opcodes from Cancun are still not supported, so we recommend working with solc 0.8.24 or older for the time being.

• Introduces more configuration options including the ability to specify the Etherscan API key via the config file.

Take a peek at Echidna v2.2.4 in action fuzzing assert.sol:

The full changelog is provided below:

Added

• Toggle tests and log panes on t and l by @arcz in https://github.com/crytic/echidna/pull/1197
• Use measureIO when saving coverage by @samalws-tob in https://github.com/crytic/echidna/pull/1202
• Adjust default GC allocation area by @elopez in https://github.com/crytic/echidna/pull/1228
• Update filterFallbacks to be selective rather than all-or-nothing by @samalws-tob in https://github.com/crytic/echidna/pull/1200
• Add symbolic execution by @samalws-tob in https://github.com/crytic/echidna/pull/1216
• Support configuring Etherscan API key via config file by @elopez in https://github.com/crytic/echidna/pull/1227
• Allow to use specific filter for direct symexec by @ggrieco-tob in https://github.com/crytic/echidna/pull/1251
• Display assertion failure immediately once falsified in text mode by @samalws-tob in https://github.com/crytic/echidna/pull/1271
• Emit log message when saving reproducers by @samalws-tob in https://github.com/crytic/echidna/pull/1273
• Emit "saved reproducer" log message as event rather than putStrLn by @samalws-tob in https://github.com/crytic/echidna/pull/1274
• Show gas per second in the UI by @samalws-tob in https://github.com/crytic/echidna/pull/1279
• Show trace on UnknownFailure by @samalws-tob in https://github.com/crytic/echidna/pull/1283
• Initial support for tstore/tload by @ggrieco-tob in https://github.com/crytic/echidna/pull/1286
• Raise default number of workers by @elopez on https://github.com/crytic/echidna/pull/1288 [BREAKING CHANGE]

Fixed

• Improve delay shrinking by @arcz in https://github.com/crytic/echidna/pull/1196
• Improved shrinking removing reverts from reproducers by @ggrieco-tob in https://github.com/crytic/echidna/pull/1250
• Shrink on one worker by @arcz in https://github.com/crytic/echidna/pull/1280
• Fix Windows support after crytic-compile changes by @elopez in https://github.com/crytic/echidna/pull/1235
• ci, release: pin macOS runners to the correct architectures by @elopez in https://github.com/crytic/echidna/pull/1244
• Avoid a crash when invalid filtering is used and provide a better error message by @ggrieco-tob in https://github.com/crytic/echidna/pull/1258
• Improve max code size error message by @arcz in https://github.com/crytic/echidna/pull/1269
• Fix MVar issue by @samalws-tob in https://github.com/crytic/echidna/pull/1281
• Minor change for symExecTimeout comments by @samalws-tob in https://github.com/crytic/echidna/pull/1285
• chore: fix some typos by @yetyear in https://github.com/crytic/echidna/pull/1215
• Fix typos by @xiaoxianBoy in https://github.com/crytic/echidna/pull/1217
• chore: remove repetitive word by @findseat in https://github.com/crytic/echidna/pull/1232
• Fix some typos in comments by @momantech in https://github.com/crytic/echidna/pull/1238
• chore: fix some comments by @cangqiaoyuzhuo in https://github.com/crytic/echidna/pull/1272
• Fix typos by @omahs in https://github.com/crytic/echidna/pull/1287
• Docs improvement by @nnsW3 in https://github.com/crytic/echidna/pull/1278

Updated

• Bump softprops/action-gh-release from 0.1.15 to 2.0.3 by @dependabot in https://github.com/crytic/echidna/pull/1203
• Bump softprops/action-gh-release from 2.0.3 to 2.0.4 by @dependabot in https://github.com/crytic/echidna/pull/1220
• Bump softprops/action-gh-release from 2.0.4 to 2.0.5 by @dependabot in https://github.com/crytic/echidna/pull/1255
• Bump softprops/action-gh-release from 2.0.5 to 2.0.6 by @dependabot in https://github.com/crytic/echidna/pull/1277
• Bump cachix/install-nix-action from 25 to 26 by @dependabot in https://github.com/crytic/echidna/pull/1204
• Bump cachix/install-nix-action from 26 to 27 by @dependabot in https://github.com/crytic/echidna/pull/1263
• Bump DeterminateSystems/magic-nix-cache-action from 3 to 4 by @dependabot in https://github.com/crytic/echidna/pull/1222
• Bump DeterminateSystems/magic-nix-cache-action from 4 to 6 by @dependabot in https://github.com/crytic/echidna/pull/1257
• Bump DeterminateSystems/magic-nix-cache-action from 6 to 7 by @dependabot in https://github.com/crytic/echidna/pull/1267
• Bump DeterminateSystems/nix-installer-action from 9 to 10 by @dependabot in https://github.com/crytic/echidna/pull/122
• Bump DeterminateSystems/nix-installer-action from 10 to 11 by @dependabot in https://github.com/crytic/echidna/pull/1256
• Bump DeterminateSystems/nix-installer-action from 11 to 12 by @dependabot in https://github.com/crytic/echidna/pull/1268
• Bump cachix/cachix-action from 14 to 15 by @dependabot in https://github.com/crytic/echidna/pull/1262
• Bump docker/build-push-action from 5 to 6 by @dependabot in https://github.com/crytic/echidna/pull/1275
• Bump sigstore/gh-action-sigstore-python from 2.1.1 to 3.0.0 by @dependabot in https://github.com/crytic/echidna/pull/1289
• Upgrade hevm to latest echidna-patches commit by @elopez in https://github.com/crytic/echidna/pull/1243

New Contributors

• @yetyear made their first contribution in https://github.com/crytic/echidna/pull/1215
• @xiaoxianBoy made their first contribution in https://github.com/crytic/echidna/pull/1217
• @findseat made their first contribution in https://github.com/crytic/echidna/pull/1232
• @momantech made their first contribution in https://github.com/crytic/echidna/pull/1238
• @cangqiaoyuzhuo made their first contribution in https://github.com/crytic/echidna/pull/1272
• @nnsW3 made their first contribution in https://github.com/crytic/echidna/pull/1278

Full Changelog: https://github.com/crytic/echidna/compare/v2.2.3...v2.2.4