Introspection

libafl/Cargo.toml

@@ -36,7 +36,7 @@ anymapdbg = ["serde_json"] # uses serde_json to Debug the anymap trait. Disable
 derive = ["libafl_derive"] # provide derive(SerdeAny) macro.
 llmp_small_maps = [] # reduces initial map size for llmp
 llmp_debug = [] # Enables debug output for LLMP
-perf_stats = ["llvmint"] # Include performance statistics of the fuzzing pipeline
+perf_stats = [] # Include performance statistics of the fuzzing pipeline
 
 [[example]]
 name = "llmp_test"
@@ -57,9 +57,7 @@ libafl_derive = { version = "*", optional = true, path = "../libafl_derive" }
 serde_json = { version = "1.0", optional = true, default-features = false, features = ["alloc"] } # an easy way to debug print SerdeAnyMap
 #TODO: for llmp brotli = { version = "3.3.0", default-features = false } # brotli compression
 num_enum = "0.5.1"
-
 backtrace = "0.3" # for llmp_debug
-llvmint = { path = "./.libs/llvmint", optional = true } # Contains llvm.readcyclecounter for perf_stats
 
 [target.'cfg(unix)'.dependencies]
 libc = "0.2" # For (*nix) libc

libafl/src/cpu.rs

@@ -1,10 +1,15 @@
 //! Architecture agnostic processor features
 
+extern {
+    #[link_name = "llvm.readcyclecounter"]
+    pub fn readcyclecounter() -> u64;
+}
+
 /// Read time counter using [`llvmint::readcyclecounter`]
 ///
 /// This function is a wrapper around [`llvmint`] to make it easier to test various
 /// implementations of reading a cycle counter. In this way, an experiment only has to
 /// change this implementation rather than every instead of [`cpu::read_time_counter`]
 pub fn read_time_counter() -> u64 {
-    unsafe { llvmint::readcyclecounter() }
+    unsafe { readcyclecounter() }
 }

libafl/src/lib.rs

@@ -3,6 +3,7 @@ Welcome to libAFL
 */
 
 #![cfg_attr(not(feature = "std"), no_std)]
+#![cfg_attr(feature = "perf_stats", feature(link_llvm_intrinsics))]
 
 #[macro_use]
 extern crate alloc;