To support AFL instrumentation, add default settings of map_size in forkserver. #2173
Conversation
|
wouldn't it be easier to just check if map_size is 0 and then set the MAP_SIZE value if so? |
|
ping @ahuo1 |
|
Oh, I'm very sorry. Line 2463 in db23931 |
|
Oh, I overlooked cmplog. I think it would be more convenient to add a check within the afl_fsrv_get_mapsize function. AFLplusplus/src/afl-forkserver.c Line 1692 in db23931 |
Just push the change and then I can review it :) |
Alright! |
|
one thing so. what happens if the map size would be exactly DEFAULT_SHMEM_SIZE by chance? |
|
Uh, yeah. To deal with it, I think the first commit is more reasonable... |
|
thank you |
Hello, when aflpp uses a binary instrumented by AFL, the binary's returned status variable is 0.
Therefore, the bitmap size for aflpp is the default 8 /* 1024 /* 1024, which severely affects the running speed.
For compatibility, I have added a default bitmap size setting in forkserver.( ◠‿◠ )
ps: I noticed that it can be resolved by setting AFL_SKIP_BIN_CHECK. However, after setting AFL_SKIP_BIN_CHECK, aflpp will no longer check persistent mode. Therefore, I think this setting is more reasonable.