Commit Graph

64 Commits

Author SHA1 Message Date
688e2c87df portability: make llvm-dict2file compilable under Ubuntu xenial (llvm 3.8.0) 2020-09-11 22:13:42 +02:00
38e6de1eff portability: make new gcc-plugin compilable under Ubuntu 16.04 (gcc 5.4.0) 2020-09-11 21:46:20 +02:00
862b6d0382 fix for afl-compiler-rt to only send dictionary data if there is some 2020-09-11 08:56:28 +02:00
fdb0452245 update documentation 2020-09-10 08:54:57 +02:00
454a860020 update gcc readme 2020-09-09 23:25:01 +02:00
9b6564f0a3 fix for gcc_plugin 2020-09-09 09:36:27 +02:00
ab744abc4b code-format 2020-09-08 17:54:01 +02:00
2802245da7 update instrumenation/README.instrument_file.md for gcc_plugin 2020-09-08 17:15:32 +02:00
9544b3dbf2 rewrite gcc plugin
When we started using AFL, it did not have an integrated GCC plugin.
There was one proposed by Austin Seipp, but for various reasons we
ended up using some of its infrastructure (runtime and wrapper), but
writing the GCC plugin proper from scratch.

With AFL++'s renewed interest in a GCC plugin, we rebased ours, with
some features that are or were missing in the one that was integrated:

* efficient, fully-functional inline and out-of-line instrumentation

Inline instrumentation was work in progress in the original plugin.
Controlled by AFL_GCC_OUT_OF_LINE.

* reproducible instrumentation

Obey -frandom-seed for pseudorandom number generation.

* licensing clarity and strict compliance

GPLv3+ for the plugin, that uses GCC internals; add a copy of the
license, as required.

* allow/deny list support

Copied and adjusted from the LLVM plugin implementation.

* neverZero support

Not as compact as the asm-wrapper version, but likely more efficient.
Both are quite thread-unsafe, with different caveats.
Controlled with AFL_GCC_SKIP_NEVERZERO.
2020-09-08 14:55:19 +02:00
06ac2850c5 bcmp for compare-transform-pass 2020-09-06 13:53:40 +02:00
6114a48b89 add std::string and bcmp to dictionary functions 2020-09-06 13:29:32 +02:00
8ec41b2585 fix various warnings 2020-09-06 11:40:41 +02:00
2508922288 cmp dict for LTO 2020-09-05 15:49:10 +02:00
996986bed5 first batch of changes 2020-09-05 12:11:48 +02:00