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| author | van Hauser <vh@thc.org> | 2019-10-27 09:04:40 +0100 |
|---|---|---|
| committer | van Hauser <vh@thc.org> | 2019-10-27 09:04:40 +0100 |
| commit | 4de38fe40a4e0dac34c178c4ef6f4cb213fb3ee3 (patch) | |
| tree | ab310b6bdee143e1009ebe28b14478c92d5afc30 | |
| parent | 8e41a59e2e00447a97208ed7cf0d163a3d47066b (diff) | |
| download | afl++-4de38fe40a4e0dac34c178c4ef6f4cb213fb3ee3.tar.gz | |
docs update
| -rw-r--r-- | README.md | 6 | ||||
| -rw-r--r-- | docs/perf_tips.txt | 9 |
2 files changed, 9 insertions, 6 deletions
diff --git a/README.md b/README.md index de012e62..88a86aaa 100644 --- a/README.md +++ b/README.md @@ -55,9 +55,9 @@ | Feature/Instrumentation | AFL-GCC | LLVM_MODE | GCC_PLUGIN | QEMU_MODE | Unicorn | | ----------------------- |:-------:|:---------:|:----------:|:---------:|:-------:| | laf-intel / CompCov | | x | | x | x | - | NeverZero | X | x(1) | (2) | x | x | - | Persistent mode | | x | X | x | | - | Whitelist | | x | X | | | + | NeverZero | x | x(1) | (2) | x | x | + | Persistent mode | | x | x | x | | + | Whitelist | | x | x | | | | InsTrim | | x | | | | neverZero: diff --git a/docs/perf_tips.txt b/docs/perf_tips.txt index 2fa19234..0cac8f7b 100644 --- a/docs/perf_tips.txt +++ b/docs/perf_tips.txt @@ -56,9 +56,9 @@ a file. 3) Use LLVM instrumentation --------------------------- -When fuzzing slow targets, you can gain 2x performance improvement by using -the LLVM-based instrumentation mode described in llvm_mode/README.llvm. Note -that this mode requires the use of clang and will not work with GCC. +When fuzzing slow targets, you can gain 20-100% performance improvement by +using the LLVM-based instrumentation mode described in llvm_mode/README.llvm. +Note that this mode requires the use of clang and will not work with GCC. The LLVM mode also offers a "persistent", in-process fuzzing mode that can work well for certain types of self-contained libraries, and for fast targets, @@ -75,6 +75,9 @@ If you are only intested in specific parts of the code being fuzzed, you can whitelist the files that are actually relevant. This improves the speed and accuracy of afl. See llvm_mode/README.whitelist +Also use the InsTrim mode on larger binaries, this improves performance and +coverage a lot. + 4) Profile and optimize the binary ---------------------------------- |