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Add LTO collision free llvm_mode (#223)

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* first new implementation, only works with AFL_DONT_OPTIMIZE

* bug hunting

* interim commit

* finalized LTO non-collision solution

* update documentation

* merge resulted in some problems, fixing these

* added lto env to env check

* fixed llvm weirdness to messes up our instrumentation due CFG rewrite optimizations

* all llvm instrumentation issues have been resolved! :-)

* llvm 9 is required (so far)

* update lto readme
This commit is contained in:
van Hauser
2020-03-05 10:52:26 +01:00
committed by GitHub
parent 70a67ca67d
commit 9d686ba523
14 changed files with 1992 additions and 57 deletions
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include/envs.h
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@ -19,6 +19,7 @@ const char *afl_environment_variables[] = {
"AFL_LLVM_LAF_SPLIT_COMPARES_BITW", "AFL_LLVM_LAF_SPLIT_FLOATS",
"AFL_LLVM_LAF_SPLIT_SWITCHES", "AFL_LLVM_LAF_TRANSFORM_COMPARES",
"AFL_LLVM_NOT_ZERO", "AFL_LLVM_WHITELIST", "AFL_NO_AFFINITY",
"AFL_LLVM_LTO_STARTID", "AFL_LLVM_LTO_DONTWRITEID",
"AFL_NO_ARITH", "AFL_NO_BUILTIN", "AFL_NO_CPU_RED", "AFL_NO_FORKSRV",
"AFL_NO_UI",
"AFL_NO_X86", // not really an env but we dont want to warn on it