Merge from rustc

1 files changed, 35 insertions, 0 deletions

diff --git a/library/std/src/sys/args/hermit.rs b/library/std/src/sys/args/hermit.rs
new file mode 100644
index 00000000000..ddd644a5540
--- /dev/null
+++ b/library/std/src/sys/args/hermit.rs
@@ -0,0 +1,35 @@
+use crate::ffi::{CStr, OsString, c_char};
+use crate::os::hermit::ffi::OsStringExt;
+use crate::ptr;
+use crate::sync::atomic::Ordering::{Acquire, Relaxed, Release};
+use crate::sync::atomic::{AtomicIsize, AtomicPtr};
+
+#[path = "common.rs"]
+mod common;
+pub use common::Args;
+
+static ARGC: AtomicIsize = AtomicIsize::new(0);
+static ARGV: AtomicPtr<*const u8> = AtomicPtr::new(ptr::null_mut());
+
+/// One-time global initialization.
+pub unsafe fn init(argc: isize, argv: *const *const u8) {
+    ARGC.store(argc, Relaxed);
+    // Use release ordering here to broadcast writes by the OS.
+    ARGV.store(argv as *mut *const u8, Release);
+}
+
+/// Returns the command line arguments
+pub fn args() -> Args {
+    // Synchronize with the store above.
+    let argv = ARGV.load(Acquire);
+    // If argv has not been initialized yet, do not return any arguments.
+    let argc = if argv.is_null() { 0 } else { ARGC.load(Relaxed) };
+    let args: Vec<OsString> = (0..argc)
+        .map(|i| unsafe {
+            let cstr = CStr::from_ptr(*argv.offset(i) as *const c_char);
+            OsStringExt::from_vec(cstr.to_bytes().to_vec())
+        })
+        .collect();
+
+    Args::new(args)
+}