libafl_derive proc macro crate

Cargo.toml

@@ -8,6 +8,7 @@ debug = true
 [workspace]
 members = [
     "libafl",
+    "libafl_derive",
 
     #example fuzzers
     "fuzzers/libfuzzer_libpng",

libafl/Cargo.toml

@@ -30,10 +30,11 @@ harness = false
 #debug = true
 
 [features]
-default = ["std", "anymapdbg"]
+default = ["std", "anymapdbg", "derive"]
 std = [] # print, sharedmap, ... support
 runtime = [] # a runtime for clang inmem-executor
-anymapdbg = [] # uses serde_json to Debug the anymap trait. Disable for smaller footprint.
+anymapdbg = ["serde_json"] # uses serde_json to Debug the anymap trait. Disable for smaller footprint.
+derive = ["libafl_derive"] # provide derive(SerdeAny) macro.
 
 [[example]]
 name = "llmp_test"
@@ -49,8 +50,9 @@ serde = { version = "1.0", default-features = false, features = ["alloc"] } # se
 erased-serde = "0.3.12"
 postcard = { version = "0.5.1", features = ["alloc"] } # no_std compatible serde serialization fromat
 static_assertions = "1.1.0"
-serde_json = { version = "1.0", default-features = false, features = ["alloc"] } # an easy way to debug print SerdeAnyMap
-ctor = "0.1.3"
+ctor = "*"
+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
 
 [target.'cfg(unix)'.dependencies]

libafl/src/lib.rs

@@ -12,6 +12,15 @@ extern crate static_assertions;
 #[macro_use]
 extern crate ctor;
 
+// Re-export derive(SerdeAny)
+#[cfg(feature = "libafl_derive")]
+#[allow(unused_imports)]
+#[macro_use]
+extern crate libafl_derive;
+#[cfg(feature = "libafl_derive")]
+#[doc(hidden)]
+pub use libafl_derive::*;
+
 pub mod bolts;
 pub mod corpus;
 pub mod events;

libafl_derive/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "libafl_derive"
+version = "0.1.0"
+authors = ["Andrea Fioraldi <andreafioraldi@gmail.com>"]
+edition = "2018"
+
+[lib]
+proc-macro = true
+
+[dependencies]
+syn = { version = "1", features = ["full", "extra-traits"] }
+quote = "1"

libafl_derive/src/lib.rs

@@ -0,0 +1,12 @@
+extern crate proc_macro;
+use proc_macro::TokenStream;
+use quote::quote;
+use syn::{parse_macro_input, DeriveInput};
+
+#[proc_macro_derive(SerdeAny)]
+pub fn libafl_serdeany_derive(input: TokenStream) -> TokenStream {
+    let name = parse_macro_input!(input as DeriveInput).ident;
+    TokenStream::from(quote! {
+        libafl::impl_serdeany!(#name);
+    })
+}