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[tmp] rudimentary support for rustc fuzzing
If you happen to stumble across this, here's how to build rustc with AFL instrumentation and make it work with this commit: 1. Run 'cargo install afl'. This will compile AFL and the LLVM plugins needed to build rust with AFL instrumentation. 2. Clone <https://github.com/rust-lang/rust>. 3. Set LIBRARY_PATH="$(realpath ~/.local/share/afl.rs/rustc-*/afl.rs-*/afl-llvm-rt" 4. Set RUSTFLAGS="-C llvm-args=-sanitizer-coverage-level=3 \ -C llvm-args=-sanitizer-coverage-trace-pc-guard \ -C passes=sancov \ -l afl-llvm-rt \ -L $(realpath ~/.local/share/afl.rs/rustc-*/afl.rs-*/afl-llvm-rt)" 5. Build rustc: ./x.py build 6. Test that it works: cargo afl showmap -o trace.txt -m 1024 -- build/x86_64-unknown-linux-gnu/stage2/bin/rustc --emit asm input.rs cat trace.txt 7. Clone <https://github.com/rust-fuzz/afl.rs>. This will give you the AFL version that you need to build this fuzzer against (edit make.sh here to point to afl.rs/afl-*/). 8. Edit main.cc to point /home/vegard/... paths to your own rustc/etc. 9. Run: mkdir output/ stderr/ 10. Run: bash make.sh && ./main
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| "[] fn [x][]([]) -> [][u32] { []; []; []; []; [0] } [] fn main() { []; []; []; []; [] }" | ||
| "[] fn [x][]([]) -> [] [{}]" | ||
| "[]; []" | ||
| "[] { [] } []" | ||
| "[] ([]) []" | ||
| "[x]x" | ||
| "[1]0" | ||
| "0" | ||
| "1" | ||
| "false" | ||
| "true" | ||
| "'x'" | ||
| "\[[]\]" | ||
| "[1], [2]" | ||
| "[1]; [2]" | ||
| "[1] + [2]" | ||
| "let x" | ||
| "let [x] = [5]" | ||
| "let [x]x = [x]" | ||
| "let ([x], [y]) = ([1], [2])" | ||
| "let [x]: [i32] = [5]" | ||
| "[x] = [10]" | ||
| "let [mut] [x] = [5]" | ||
| "i32" | ||
| "[x]: [i32]" | ||
| "\"foo\"" | ||
| "println!(\"!\")" | ||
| "println!(\"{}\", [x]);" | ||
| "return [x]" | ||
| "!" | ||
| "[x].[len]()" | ||
| "x\[[0]\]" | ||
| "[0]..[1]" | ||
| "[0]," | ||
| "[x].[0]" | ||
| "[i32] { [x] }" | ||
| "if [x] [==] [5] { [] } else { [] }" | ||
| "loop { [] }" | ||
| "while [true] { [] }" | ||
| "[x] % [5] [==] [0]" | ||
| "for ([x] = [0]; [x] [<] [10]; [x++]) { [] }" | ||
| "for [x] in [0]..[10] { [] }" | ||
| "[x].enumerate()" | ||
| "break" | ||
| "continue" | ||
| "'[L]: []" | ||
| "break '[L]" | ||
| "continue '[L]" | ||
| "[] []" | ||
| "#[]\[allow(unused_variables)\]" | ||
| "#[]\[allow(unreachable_code)\]" | ||
| "#[]\[allow(dead_code)\]" | ||
| "!" | ||
| "let [x] = vec!\[[]\];" | ||
| "match [x].get([7]) { [] }" | ||
| "Some([x]) => [0]" | ||
| "None => [0]" | ||
| "mut [x]" | ||
| "&[] [mut] [x]" | ||
| "" | ||
| "bool" | ||
| "Vec<[i32]>" | ||
| "|[x]| [x]" | ||
| "*x" | ||
| "&x" | ||
| "[x].[as_str]([])" | ||
| "'[a]" | ||
| "<[]>" | ||
| "<'[a]>" | ||
| "&'a [u32]" | ||
| "str" | ||
| "'[a]" | ||
| "impl" | ||
| "impl<'[a]> [Foo]<'[a]> { [] }" | ||
| "[Foo] { [] }" | ||
| "[x]: [x]" | ||
| "[x].[x]([])" | ||
| "static" | ||
| "[] use [std]::[cell]::[Cell]" | ||
| "[] struct [Foo] [] { [] }" | ||
| "assert_eq!([1], [1])" | ||
| "#\[derive(Debug)\]" | ||
| "[] struct [Foo]([])" | ||
| "[] enum [Foo] [] { [] }" | ||
| "[x]::[x]" | ||
| "String" | ||
| "[_] => [0]," | ||
| "['a'] ... ['z']" | ||
| "[x] @ [0] => 0," | ||
| "[x] | [0] => 0," | ||
| "const" | ||
| "Vec::new()" | ||
| "Vec::<[bool]>::new()" | ||
| "[x] * [x]" | ||
| "f64" | ||
| "3.14159216" | ||
| "assert!([1])" | ||
| "b\"whatever\"" | ||
| "#\[derive([Debug])\]" | ||
| "impl [Drop] for [Foo] { [] }" | ||
| "Debug" | ||
| "Drop" | ||
| "Foo" | ||
| "*[mut] ([])" | ||
| "fn[](*[mut] ([]))" | ||
| "unsafe []" | ||
| "unsafe { [] }" | ||
| "Clone" | ||
| "&[x] as &[Clone]" | ||
| "|[x]| { [] }" | ||
| "|[x]: [i32]| { [] }" | ||
| "move |[x]: [i32]| { [] }" | ||
| "move" | ||
| "<[Foo] as [Foo]>" | ||
| "\[[u8]; [10]\]" | ||
| "[] pub" | ||
| "macro_rules! [vec] { ( $( $[x]:[expr] ),* ) => { [] } }" | ||
| "macro_rules! [x] { [] }" | ||
| "$( [] )*" | ||
| "$[x]" | ||
| "{{ [] }}" | ||
| "item" | ||
| "block" | ||
| "stmt" | ||
| "pat" | ||
| "expr" | ||
| "ty" | ||
| "ident" | ||
| "path" | ||
| "tt" | ||
| "meta" | ||
| "None?" | ||
| "Some([x])?" | ||
| "Some([x])" | ||
| "![true]" | ||
| "-[x]" | ||
| "[] mod [math] [{}]" | ||
| "#\[path = [\"x\"]\]" | ||
| "#!\[crate_name = [\"x\"]\]" | ||
| "#!\[crate_type = [\"lib\"]\] []" | ||
| "extern crate [std]" | ||
| "extern crate [std] as [std]" | ||
| "#\[link([name] = [\"x\"])" | ||
| "#\[cfg([test])\]" | ||
| "#\[[test]\]" | ||
| "#\[cfg(target_os=[\"linux\"])\]" | ||
| "#\[[crate_name]=[\"x\"]\]" | ||
| "#\[[plugin]([x])\]" | ||
| "crate_type" | ||
| "feature" | ||
| "no_builtins" | ||
| "no_main" | ||
| "no_start" | ||
| "no_std" | ||
| "plugin" | ||
| "recursion_limit" | ||
| "main" | ||
| "plugin_registrar" | ||
| "start" | ||
| "should_panic" | ||
| "cold" | ||
| "thread_local" | ||
| "link_args" | ||
| "link" | ||
| "linked_from" | ||
| "link_name" | ||
| "linkage" | ||
| "repr" | ||
| "macro_use" | ||
| "macro_reexport" | ||
| "macro_export" | ||
| "no_link" | ||
| "export_name" | ||
| "link_section" | ||
| "no_mangle" | ||
| "simd" | ||
| "unsafe_destructor_blind_to_params" | ||
| "unsafe_no_drop_flag" | ||
| "doc" | ||
| "rustc_on_unimplemented" | ||
| "debug_assertions" | ||
| "target_arch" | ||
| "target_endian" | ||
| "target_env" | ||
| "target_family" | ||
| "target_os" | ||
| "target_pointer_width" | ||
| "target_vendor" | ||
| "unix" | ||
| "windows" | ||
| "allow" | ||
| "deny" | ||
| "forbid" | ||
| "warn" | ||
| "lang" | ||
| "inline" | ||
| "inline(always)" | ||
| "inline(never)" | ||
| "derive([PartialEq], [Clone])" | ||
| "feature" | ||
| "advanced_slice_patterns" | ||
| "slice_patterns" | ||
| "asm" | ||
| "asm!" | ||
| "asm!([\"nop\"])" | ||
| "asm!(\"xor %eax, %eax\" : [] : [] : [\"eax\"])" | ||
| "asm!(\"in %dx, %al\" : \"={[al]}\"([x]) : \"{[dx]}\"([x]))" | ||
| "[panic]!([])" | ||
| "panic" | ||
| "file" | ||
| "line" | ||
| "debug_assert" | ||
| "array" | ||
| "bool" | ||
| "char" | ||
| "f32" | ||
| "f64" | ||
| "fn" | ||
| "i8" | ||
| "i16" | ||
| "i32" | ||
| "i64" | ||
| "isize" | ||
| "pointer" | ||
| "reference" | ||
| "slice" | ||
| "str" | ||
| "tuple" | ||
| "u8" | ||
| "u16" | ||
| "u32" | ||
| "u64" | ||
| "unit" | ||
| "usize" | ||
| "i128" | ||
| "u128" | ||
| "never" |