diff options
Diffstat (limited to 'docs/env_variables.md')
| -rw-r--r-- | docs/env_variables.md | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/docs/env_variables.md b/docs/env_variables.md index 7bbc0fdd..b4b866ab 100644 --- a/docs/env_variables.md +++ b/docs/env_variables.md @@ -231,6 +231,11 @@ Then there are a few specific features that are only available in instrumentatio See [instrumentation/README.instrument_list.md](../instrumentation/README.instrument_list.md) for more information. +### Thread safe instrumentation counters (in mode LLVM CLASSIC) + - Setting `AFL_LLVM_THREADSAFE_INST` will inject code that implements thread safe counters. + The overhead is a bit higher compared to the older non-thread safe case. + `AFL_LLVM_NOT_ZERO` and `AFL_LLVM_SKIP_NEVERZERO` are supported (see below). + ### NOT_ZERO - Setting `AFL_LLVM_NOT_ZERO=1` during compilation will use counters |