Add seed corpus for AFL fuzzer

.github/workflows/ci.yml

@@ -49,4 +49,4 @@ jobs:
           mkdir build && cd build
           cmake -DENABLE_FUZZ=ON .. 
           make fuzz_lexer
-          ./fuzz_lexer -i ../fuzz/corpus -o ./findings -t 1000
+          ./fuzz_lexer -i ../tools/fuzz/corpus -o ./findings -t 1000

README.md

@@ -59,14 +59,9 @@ guidelines.
 
 ## Fuzzing Tools
 
-Experimental AFL++ harnesses live in `tools/fuzz`.  You can build the
-lexer fuzzer with Zig and run it against the sample corpus in
-`fuzz/corpus` to discover crashes in the lexer and parser:
-
-```bash
-zig build fuzz-lexer
-./zig-out/bin/fuzz_lexer -i fuzz/corpus -o findings
-```
+Experimental AFL++ harnesses live in `tools/fuzz`.  They can be
+built with CMake using `-DENABLE_FUZZ=ON` and run against the sample
+corpus in `tools/fuzz/corpus` to discover crashes in the lexer and parser.
 
 
 ## Legacy Ouroboros Sources

docs/testing.md

@@ -15,7 +15,8 @@ zig build mod-test
 
 If AFL++ is installed you can build the lexer fuzzer using Zig:
 
-```bash
-zig build fuzz-lexer
-./zig-out/bin/fuzz_lexer -i fuzz/corpus -o findings
+```
+cmake -DENABLE_FUZZ=ON ..
+make fuzz_lexer
+./fuzz_lexer -i ../tools/fuzz/corpus -o ./findings
 ```

tools/fuzz/README.md

@@ -6,10 +6,10 @@ This directory contains the AFL++ based lexer fuzzer. Build it using Zig:
 zig build fuzz-lexer
 ```
 
-Provide a seed corpus in `fuzz/corpus` and run the fuzzer:
+Provide a seed corpus in `corpus` and run the fuzzer:
 
 ```bash
-./zig-out/bin/fuzz_lexer -i fuzz/corpus -o findings
+./fuzz_lexer -i ../tools/fuzz/corpus -o ./findings
 ```
 
 Crashes will be written to the `findings` directory for investigation.

tools/fuzz/corpus/seed1.ouro

@@ -0,0 +1 @@
+let x = 1;