From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:02:58 +0200 Subject: Adding upstream version 1.64.0+dfsg1. Signed-off-by: Daniel Baumann --- library/backtrace/src/symbolize/gimli/mmap_unix.rs | 44 ++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 library/backtrace/src/symbolize/gimli/mmap_unix.rs (limited to 'library/backtrace/src/symbolize/gimli/mmap_unix.rs') diff --git a/library/backtrace/src/symbolize/gimli/mmap_unix.rs b/library/backtrace/src/symbolize/gimli/mmap_unix.rs new file mode 100644 index 000000000..5806c9f7e --- /dev/null +++ b/library/backtrace/src/symbolize/gimli/mmap_unix.rs @@ -0,0 +1,44 @@ +use super::mystd::fs::File; +use super::mystd::os::unix::prelude::*; +use core::ops::Deref; +use core::ptr; +use core::slice; + +pub struct Mmap { + ptr: *mut libc::c_void, + len: usize, +} + +impl Mmap { + pub unsafe fn map(file: &File, len: usize) -> Option { + let ptr = libc::mmap( + ptr::null_mut(), + len, + libc::PROT_READ, + libc::MAP_PRIVATE, + file.as_raw_fd(), + 0, + ); + if ptr == libc::MAP_FAILED { + return None; + } + Some(Mmap { ptr, len }) + } +} + +impl Deref for Mmap { + type Target = [u8]; + + fn deref(&self) -> &[u8] { + unsafe { slice::from_raw_parts(self.ptr as *const u8, self.len) } + } +} + +impl Drop for Mmap { + fn drop(&mut self) { + unsafe { + let r = libc::munmap(self.ptr, self.len); + debug_assert_eq!(r, 0); + } + } +} -- cgit v1.2.3