Remove useless cfgs (AFLplusplus#2764)

Author: tokatoka

libafl/src/corpus/cached.rs

@@ -18,7 +18,6 @@ use crate::{
 /// A corpus that keeps a maximum number of [`Testcase`]s in memory
 /// and load them from disk, when they are being used.
 /// The eviction policy is FIFO.
-#[cfg(feature = "std")]
 #[derive(Default, Serialize, Deserialize, Clone, Debug)]
 pub struct CachedOnDiskCorpus<I> {
     inner: InMemoryOnDiskCorpus<I>,

libafl/src/corpus/inmemory_ondisk.rs

@@ -6,11 +6,11 @@
 
 use alloc::string::String;
 use core::cell::RefCell;
-#[cfg(feature = "std")]
-use std::{fs, fs::File, io::Write};
 use std::{
-    fs::OpenOptions,
+    fs,
+    fs::{File, OpenOptions},
     io,
+    io::Write,
     path::{Path, PathBuf},
 };
 
@@ -50,7 +50,6 @@ fn try_create_new<P: AsRef<Path>>(path: P) -> Result<Option<File>, io::Error> {
 /// A corpus able to store [`Testcase`]s to disk, while also keeping all of them in memory.
 ///
 /// Metadata is written to a `.<filename>.metadata` file in the same folder by default.
-#[cfg(feature = "std")]
 #[derive(Default, Serialize, Deserialize, Clone, Debug)]
 pub struct InMemoryOnDiskCorpus<I> {
     inner: InMemoryCorpus<I>,

libafl/src/corpus/ondisk.rs

@@ -22,7 +22,6 @@ use crate::{
 };
 
 /// Options for the the format of the on-disk metadata
-#[cfg(feature = "std")]
 #[derive(Default, Debug, Clone, Serialize, Deserialize)]
 pub enum OnDiskMetadataFormat {
     /// A binary-encoded postcard

libafl/src/executors/command.rs

@@ -862,7 +862,7 @@ pub trait CommandConfigurator<I, C = Child>: Sized {
 }
 
 /// waitpid wrapper that ignores some signals sent by the ptraced child
-#[cfg(all(feature = "std", target_os = "linux"))]
+#[cfg(target_os = "linux")]
 fn waitpid_filtered(pid: Pid, options: Option<WaitPidFlag>) -> Result<WaitStatus, Errno> {
     loop {
         let wait_status = waitpid(pid, options);

libafl/src/executors/hooks/timer.rs

@@ -58,7 +58,7 @@ pub(crate) struct Itimerval {
     pub it_value: Timeval,
 }
 
-#[cfg(all(feature = "std", unix, not(target_os = "linux")))]
+#[cfg(all(unix, not(target_os = "linux")))]
 extern "C" {
     pub(crate) fn setitimer(
         which: libc::c_int,
@@ -102,7 +102,7 @@ pub struct TimerStruct {
     pub(crate) tmout_start_time: Duration,
 }
 
-#[cfg(all(feature = "std", windows))]
+#[cfg(windows)]
 #[allow(non_camel_case_types)]
 type PTP_TIMER_CALLBACK = unsafe extern "system" fn(
     param0: PTP_CALLBACK_INSTANCE,

libafl/src/executors/inprocess_fork/mod.rs

@@ -349,7 +349,7 @@ pub mod child_signal_handlers {
 }
 
 #[cfg(test)]
-#[cfg(all(feature = "std", feature = "fork", unix))]
+#[cfg(all(feature = "fork", unix))]
 mod tests {
     use libafl_bolts::tuples::tuple_list;
     use serial_test::serial;

libafl/src/observers/stdio.rs

@@ -3,7 +3,7 @@
 //! The [`StdOutObserver`] and [`StdErrObserver`] observers look at the stdout of a program
 //! The executor must explicitly support these observers.
 #![cfg_attr(
-    all(feature = "std", unix),
+    unix,
     doc = r"For example, they are supported on the [`crate::executors::CommandExecutor`]."
 )]
 
@@ -19,11 +19,8 @@ use crate::{observers::Observer, Error};
 /// Only works for supported executors.
 ///
 /// # Example usage
-#[cfg_attr(all(feature = "std", target_os = "linux", not(miri)), doc = " ```")] // miri doesn't like the Command crate, linux as a shorthand for the availability of base64
-#[cfg_attr(
-    not(all(feature = "std", target_os = "linux", not(miri))),
-    doc = " ```ignore"
-)]
+#[cfg_attr(all(target_os = "linux", not(miri)), doc = " ```")] // miri doesn't like the Command crate, linux as a shorthand for the availability of base64
+#[cfg_attr(not(all(target_os = "linux", not(miri))), doc = " ```ignore")]
 /// use std::borrow::Cow;
 ///
 /// use libafl::{

libafl/src/stages/sync.rs

@@ -282,7 +282,7 @@ where
                         client_config: EventConfig::AlwaysUnique,
                         time: current_time(),
                         forward_id: None,
-                        #[cfg(all(unix, feature = "std", feature = "multi_machine"))]
+                        #[cfg(all(unix, feature = "multi_machine"))]
                         node_id: None,
                     },
                 )?;