ExternalVendorCode/AFLplusplus
1
0
Fork 0
mirror of https://github.com/AFLplusplus/AFLplusplus.git synced 2025-06-13 18:48:08 +00:00
Code Issues Packages Projects Releases Wiki Activity

fixing commit fuckup

Browse Source
This commit is contained in:
van Hauser
2019-07-15 11:22:54 +02:00
parent 2628f9f61b
commit 3252523823
8 changed files with 52 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
llvm_mode/README.llvm
View File

@ -88,13 +88,18 @@ which C/C++ files to actually intrument. See README.whitelist
For splitting memcmp, strncmp, etc. please see README.laf-intel
As the original afl llvm_mode implementation has been replaced with
then much more effective instrim (https://github.com/csienslab/instrim/)
there is an option for optimizing loops. This optimization shows which
part of the loop has been selected, but not how many time a loop has been
called in a row (unless its a complex loop and a block inside was
instrumented). If you want to enable this set the environment variable
LOOPHEAD=1
Then there is an optimized instrumentation strategy that uses CFGs and
markers to just instrument what is needed. This increases speed by 20-25%
however has a lower path discovery.
If you want to use this, set AFL_LLVM_INSTRIM=1
See README.instrim
Finally if your llvm version is 8 or lower, you can activate a mode that
prevents that a counter overflow result in a 0 value. This is good for
path discovery, but the llvm implementation for intel for this functionality
is not optimal and was only fixed in llvm 9.
You can set this with AFL_LLVM_NOT_ZERO=1
See README.neverzero
4) Gotchas, feedback, bugs