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| author | van Hauser <vh@thc.org> | 2020-09-05 13:26:08 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-09-05 13:26:08 +0200 |
| commit | 81b1d85f6168cb0828b4afef5d7994dba3c6753e (patch) | |
| tree | 8ddfccbd1594c3f3c50025eb8cbe23f84a10fa20 /llvm_mode/README.ctx.md | |
| parent | fac108476c1cb5326cf4339b2a4c846828698816 (diff) | |
| parent | 2f90f2faba92c0ef5e081ff74b54fb07eb1faaa9 (diff) | |
| download | afl++-81b1d85f6168cb0828b4afef5d7994dba3c6753e.tar.gz | |
Merge pull request #548 from AFLplusplus/pre-3
Pre 3.0 changes
Diffstat (limited to 'llvm_mode/README.ctx.md')
| -rw-r--r-- | llvm_mode/README.ctx.md | 22 |
1 files changed, 0 insertions, 22 deletions
diff --git a/llvm_mode/README.ctx.md b/llvm_mode/README.ctx.md deleted file mode 100644 index 14255313..00000000 --- a/llvm_mode/README.ctx.md +++ /dev/null @@ -1,22 +0,0 @@ -# AFL Context Sensitive Branch Coverage - -## What is this? - -This is an LLVM-based implementation of the context sensitive branch coverage. - -Basically every function gets it's own ID and that ID is combined with the -edges of the called functions. - -So if both function A and function B call a function C, the coverage -collected in C will be different. - -In math the coverage is collected as follows: -`map[current_location_ID ^ previous_location_ID >> 1 ^ previous_callee_ID] += 1` - -## Usage - -Set the `AFL_LLVM_INSTRUMENT=CTX` or `AFL_LLVM_CTX=1` environment variable. - -It is highly recommended to increase the MAP_SIZE_POW2 definition in -config.h to at least 18 and maybe up to 20 for this as otherwise too -many map collisions occur. |