From 1b6a04ca5504955c571d1c97504fb45ea0befee4 Mon Sep 17 00:00:00 2001
From: Valentin Popov <valentin@popov.link>
Date: Mon, 8 Jan 2024 01:21:28 +0400
Subject: Initial vendor packages
Signed-off-by: Valentin Popov <valentin@popov.link>
---
vendor/backtrace/src/symbolize/gimli/mmap_unix.rs | 49 +++++++++++++++++++++++
1 file changed, 49 insertions(+)
create mode 100644 vendor/backtrace/src/symbolize/gimli/mmap_unix.rs
(limited to 'vendor/backtrace/src/symbolize/gimli/mmap_unix.rs')
diff --git a/vendor/backtrace/src/symbolize/gimli/mmap_unix.rs b/vendor/backtrace/src/symbolize/gimli/mmap_unix.rs
new file mode 100644
index 0000000..261ffc1
--- /dev/null
+++ b/vendor/backtrace/src/symbolize/gimli/mmap_unix.rs
@@ -0,0 +1,49 @@
+use super::mystd::fs::File;
+use super::mystd::os::unix::prelude::*;
+use core::ops::Deref;
+use core::ptr;
+use core::slice;
+
+#[cfg(not(all(target_os = "linux", target_env = "gnu")))]
+use libc::mmap as mmap64;
+#[cfg(all(target_os = "linux", target_env = "gnu"))]
+use libc::mmap64;
+
+pub struct Mmap {
+ ptr: *mut libc::c_void,
+ len: usize,
+}
+
+impl Mmap {
+ pub unsafe fn map(file: &File, len: usize) -> Option<Mmap> {
+ let ptr = mmap64(
+ 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);
+ }
+ }
+}
--
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