Fix clippy warnings (#37)

* fix some clippy warnings

* add a actions job for linting

* remove needless line

* add `run-on` to build_and_test.yml

.github/workflows/build_and_test.yml

@@ -10,6 +10,27 @@ env:
   CARGO_TERM_COLOR: always
 
 jobs:
+  lint:
+    strategy:
+      matrix:
+          os: [ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v2
+      - name: Cache cargo registry
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+          key: clippy-cargo-${{ hashFiles('**/Cargo.toml') }}
+      - name: Add clippy
+        run: rustup component add clippy
+      - name: Run clippy
+        uses: actions-rs/cargo@v1
+        with:
+          command: clippy
+          args: --all
   ubuntu:
     runs-on: ubuntu-latest
     steps:

Cargo.toml

@@ -1,4 +1,3 @@
-
 [profile.release]
 lto = true
 codegen-units = 1

libafl/src/bolts/llmp.rs

@@ -1018,7 +1018,7 @@ where
                     /* We can reuse the map mem space, no need to free and calloc.
                     However, the pageinfo points to the map we're about to unmap.
                     Clone the contents first to be safe (probably fine in rust eitner way). */
-                    let pageinfo_cpy = (*pageinfo).clone();
+                    let pageinfo_cpy = *pageinfo;
 
                     // Mark the old page save to unmap, in case we didn't so earlier.
                     ptr::write_volatile(&mut (*page).save_to_unmap, 1);
@@ -1434,7 +1434,7 @@ where
         // to read from the initial map id.
 
         let client_out_map_mem = &self.llmp_out.out_maps.first().unwrap().shmem;
-        let broadcast_str_initial = client_out_map_mem.shm_slice().clone();
+        let broadcast_str_initial = *client_out_map_mem.shm_slice();
 
         let llmp_tcp_id = self.llmp_clients.len() as u32;
 

libafl/src/bolts/shmem.rs

@@ -370,7 +370,7 @@ pub mod unix_shmem {
             // Not set or not initialized;
             return;
         }
-        (*shm).shm_str[0 as usize] = 0u8;
+        (*shm).shm_str[0_usize] = 0u8;
         shmctl((*shm).shm_id, 0 as c_int, ptr::null_mut());
         (*shm).map = ptr::null_mut();
     }

libafl/src/executors/inprocess.rs

@@ -223,10 +223,7 @@ mod unix_signal_handler {
     use core::ptr;
     use libc::{c_void, siginfo_t};
     #[cfg(feature = "std")]
-    use std::{
-        fs,
-        io::{stdout, Write},
-    };
+    use std::io::{stdout, Write};
 
     use crate::{
         bolts::os::unix_signals::{Handler, Signal},
@@ -443,7 +440,7 @@ mod unix_signal_handler {
             }
             // let's yolo-cat the maps for debugging, if possible.
             #[cfg(all(target_os = "linux", feature = "std"))]
-            match fs::read_to_string("/proc/self/maps") {
+            match std::fs::read_to_string("/proc/self/maps") {
                 Ok(maps) => println!("maps:\n{}", maps),
                 Err(e) => println!("Couldn't load mappings: {:?}", e),
             };

libafl/src/mutators/mutations.rs

@@ -752,13 +752,13 @@ where
 
 // Converts a hex u8 to its u8 value: 'A' -> 10 etc.
 fn from_hex(hex: u8) -> Result<u8, Error> {
-    if hex >= 48 && hex <= 57 {
+    if (48..=57).contains(&hex) {
         return Ok(hex - 48);
     }
-    if hex >= 65 && hex <= 70 {
+    if (65..=70).contains(&hex) {
         return Ok(hex - 55);
     }
-    if hex >= 97 && hex <= 102 {
+    if (97..=102).contains(&hex) {
         return Ok(hex - 87);
     }
     Err(Error::IllegalArgument("".to_owned()))
@@ -781,8 +781,7 @@ pub fn str_decode(item: &str) -> Result<Vec<u8>, Error> {
             decoded += from_hex(c)?;
             token.push(decoded);
             take_next_two = 0;
-        } else {
-            if c != backslash || take_next {
+        } else if c != backslash || take_next {
             if take_next && (c == 120 || c == 88) {
                 take_next_two = 1;
             } else {
@@ -793,7 +792,6 @@ pub fn str_decode(item: &str) -> Result<Vec<u8>, Error> {
             take_next = true;
         }
     }
-    }
 
     Ok(token)
 }