Attachment 242914 Details for Bug 272102 – retrieve rss with sysctl

retrieve rss with sysctl

patch-runtime_ops_os_mod.rs (text/plain), 1.46 KB, created by Mikael Urankar on 2023-06-21 08:07:41 UTC

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Creator: Mikael Urankar

Created: 2023-06-21 08:07:41 UTC

Size: 1.46 KB

patch

obsolete

>--- runtime/ops/os/mod.rs.orig	2023-01-13 13:12:37 UTC
>+++ runtime/ops/os/mod.rs
>@@ -427,6 +427,46 @@ fn rss() -> usize {
>   }
> }
> 
>+#[cfg(target_os = "freebsd")]
>+fn rss() -> usize {
>+  // Uses FreeBSD's KERN_PROC_PID sysctl(2)
>+  // to retrieve information about the current
>+  // process, part of which is the RSS (ki_rssize)
>+  let pid = unsafe { libc::getpid() };
>+  // SAFETY: libc call (get system page size)
>+  let pagesize = unsafe { libc::sysconf(libc::_SC_PAGESIZE) } as usize;
>+  // KERN_PROC_PID returns a struct libc::kinfo_proc
>+  let mut kinfoproc = std::mem::MaybeUninit::<libc::kinfo_proc>::uninit();
>+  let mut size = std::mem::size_of_val(&kinfoproc) as libc::size_t;
>+  let mut mib = [
>+    libc::CTL_KERN,
>+    libc::KERN_PROC,
>+    libc::KERN_PROC_PID,
>+    pid,
>+  ];
>+  // SAFETY: libc call, mib has been statically initialized,
>+  // kinfoproc is a valid pointer to a libc::kinfo_proc struct
>+  let res = unsafe {
>+    libc::sysctl(
>+      mib.as_mut_ptr(),
>+      mib.len() as _,
>+      kinfoproc.as_mut_ptr() as *mut libc::c_void,
>+      &mut size,
>+      std::ptr::null_mut(),
>+      0,
>+    )
>+  };
>+
>+  if res == 0 {
>+    // SAFETY: sysctl returns 0 on success and kinfoproc is initialized
>+    // ki_rssize contains size in pages -> multiply with pagesize to
>+    // get size in bytes.
>+    pagesize * unsafe { (*kinfoproc.as_mut_ptr()).ki_rssize as usize }
>+  } else {
>+    0
>+  } 
>+}
>+
> #[cfg(windows)]
> fn rss() -> usize {
>   use winapi::shared::minwindef::DWORD;

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Attachments on bug 272102: 242913 | 242914 | 242915