Bump libc from 0.2.178 to 0.2.179 (RustPython#6654)

* Bump libc from 0.2.178 to 0.2.179

Bumps [libc](https://github.com/rust-lang/libc) from 0.2.178 to 0.2.179.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Changelog](https://github.com/rust-lang/libc/blob/main/CHANGELOG.md)
- [Commits](rust-lang/libc@0.2.178...0.2.179)

---
updated-dependencies:
- dependency-name: libc
  dependency-version: 0.2.179
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

* Fix musl and wasi builds after libc 0.2.179 upgrade (RustPython#6655)

* Initial plan

* Fix musl and wasi build failures after libc 0.2.179 upgrade

- Remove wasi-specific implementation of get_process_time that used CLOCK_PROCESS_CPUTIME_ID
- Exclude wasi from CLOCK_PROCESS_CPUTIME_ID constant export
- Add musl and wasi to use st_atim/st_mtim/st_ctim timespec fields for stat structure

Co-authored-by: youknowone <69878+youknowone@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: youknowone <69878+youknowone@users.noreply.github.com>

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com>
Co-authored-by: youknowone <69878+youknowone@users.noreply.github.com>

Author: 3 people

Cargo.lock

@@ -177,7 +177,7 @@ insta = "1.46"
 itertools = "0.14.0"
 is-macro = "0.3.7"
 junction = "1.3.0"
-libc = "0.2.178"
+libc = "0.2.179"
 libffi = "5"
 log = "0.4.29"
 nix = { version = "0.30", features = ["fs", "user", "process", "term", "time", "signal", "ioctl", "socket", "sched", "zerocopy", "dir", "hostname", "net", "poll"] }

Cargo.toml

@@ -918,7 +918,7 @@ pub(super) mod _os {
         fn from_stat(stat: &StatStruct, vm: &VirtualMachine) -> Self {
             let (atime, mtime, ctime);
             #[cfg(any(unix, windows))]
-            #[cfg(not(target_os = "netbsd"))]
+            #[cfg(not(any(target_os = "netbsd", target_os = "wasi", target_env = "musl")))]
             {
                 atime = (stat.st_atime, stat.st_atime_nsec);
                 mtime = (stat.st_mtime, stat.st_mtime_nsec);
@@ -930,7 +930,7 @@ pub(super) mod _os {
                 mtime = (stat.st_mtime, stat.st_mtimensec);
                 ctime = (stat.st_ctime, stat.st_ctimensec);
             }
-            #[cfg(target_os = "wasi")]
+            #[cfg(any(target_os = "wasi", target_env = "musl"))]
             {
                 atime = (stat.st_atim.tv_sec, stat.st_atim.tv_nsec);
                 mtime = (stat.st_mtim.tv_sec, stat.st_mtim.tv_nsec);

crates/vm/src/stdlib/os.rs

@@ -441,19 +441,6 @@ mod decl {
         ))
     }
 
-    // same as the get_process_time impl for most unixes
-    #[cfg(all(target_arch = "wasm32", target_os = "wasi"))]
-    pub(super) fn get_process_time(vm: &VirtualMachine) -> PyResult<Duration> {
-        let time: libc::timespec = unsafe {
-            let mut time = std::mem::MaybeUninit::uninit();
-            if libc::clock_gettime(libc::CLOCK_PROCESS_CPUTIME_ID, time.as_mut_ptr()) == -1 {
-                return Err(vm.new_os_error("Failed to get clock time".to_owned()));
-            }
-            time.assume_init()
-        };
-        Ok(Duration::new(time.tv_sec as u64, time.tv_nsec as u32))
-    }
-
     #[cfg(not(any(
         windows,
         target_os = "macos",
@@ -466,7 +453,7 @@ mod decl {
         target_os = "solaris",
         target_os = "openbsd",
         target_os = "redox",
-        all(target_arch = "wasm32", not(target_os = "unknown"))
+        all(target_arch = "wasm32", target_os = "emscripten")
     )))]
     fn get_process_time(vm: &VirtualMachine) -> PyResult<Duration> {
         Err(vm.new_not_implemented_error("process time unsupported in this system"))
@@ -601,6 +588,7 @@ mod platform {
         target_os = "netbsd",
         target_os = "solaris",
         target_os = "openbsd",
+        target_os = "wasi",
     )))]
     #[pyattr]
     use libc::CLOCK_PROCESS_CPUTIME_ID;