commit 4d3310932a86aae731688ac30568f7cfb301dc35 Author: Nick Mathewson <nickm@torproject.org> Date: Fri Feb 24 10:57:58 2017 -0500 Small fixes to fuzzing documentation. --- changes/bug21472 | 3 +++ doc/HACKING/Fuzzing.md | 12 ++++++------ 2 files changed, 9 insertions(+), 6 deletions(-) diff --git a/changes/bug21472 b/changes/bug21472 new file mode 100644 index 0000000..f31ec91 --- /dev/null +++ b/changes/bug21472 @@ -0,0 +1,3 @@ + o Documentation: + - Small fixes to the fuzzing documentation. Closes ticket + 21472. diff --git a/doc/HACKING/Fuzzing.md b/doc/HACKING/Fuzzing.md index 16b0b6b..2039d6a 100644 --- a/doc/HACKING/Fuzzing.md +++ b/doc/HACKING/Fuzzing.md @@ -64,14 +64,14 @@ To Build: make cd ../tor PATH=$PATH:../afl/ CC="../afl/afl-gcc" ./configure --enable-expensive-hardening - AFL_HARDEN=1 make clean fuzz + AFL_HARDEN=1 make clean fuzzers To Find The ASAN Memory Limit: (64-bit only) -On 64-bit platforms, afl needs to know how much memory ASAN uses. -Or, you can configure tor without --enable-expensive-hardening, then use - make fuzz -to run the generated test cases through an ASAN-enabled fuzz-http. +On 64-bit platforms, afl needs to know how much memory ASAN uses, +because ASAN tends to allocate a ridiculous amount of virtual memory, +and then not actually use it. + Read afl/docs/notes_for_asan.txt for more details. Download recidivm from http://jwilk.net/software/recidivm @@ -80,7 +80,7 @@ Read afl/docs/notes_for_asan.txt for more details. tar xvzf recidivm*.tar.gz cd recidivm* make - /path/to/recidivm -v src/test/fuzz_dir + /path/to/recidivm -v src/test/fuzz/fuzz-http Use the final "ok" figure as the input to -m when calling afl-fuzz (Normally, recidivm would output a figure automatically, but in some cases, the fuzzing harness will hang when the memory limit is too small.)