aboutsummaryrefslogtreecommitdiff
path: root/vendor/backtrace/src/symbolize/gimli/stash.rs
diff options
context:
space:
mode:
Diffstat (limited to 'vendor/backtrace/src/symbolize/gimli/stash.rs')
-rw-r--r--vendor/backtrace/src/symbolize/gimli/stash.rs50
1 files changed, 0 insertions, 50 deletions
diff --git a/vendor/backtrace/src/symbolize/gimli/stash.rs b/vendor/backtrace/src/symbolize/gimli/stash.rs
deleted file mode 100644
index 792f9a6..0000000
--- a/vendor/backtrace/src/symbolize/gimli/stash.rs
+++ /dev/null
@@ -1,50 +0,0 @@
-// only used on Linux right now, so allow dead code elsewhere
-#![cfg_attr(not(target_os = "linux"), allow(dead_code))]
-
-use super::Mmap;
-use alloc::vec;
-use alloc::vec::Vec;
-use core::cell::UnsafeCell;
-
-/// A simple arena allocator for byte buffers.
-pub struct Stash {
- buffers: UnsafeCell<Vec<Vec<u8>>>,
- mmaps: UnsafeCell<Vec<Mmap>>,
-}
-
-impl Stash {
- pub fn new() -> Stash {
- Stash {
- buffers: UnsafeCell::new(Vec::new()),
- mmaps: UnsafeCell::new(Vec::new()),
- }
- }
-
- /// Allocates a buffer of the specified size and returns a mutable reference
- /// to it.
- pub fn allocate(&self, size: usize) -> &mut [u8] {
- // SAFETY: this is the only function that ever constructs a mutable
- // reference to `self.buffers`.
- let buffers = unsafe { &mut *self.buffers.get() };
- let i = buffers.len();
- buffers.push(vec![0; size]);
- // SAFETY: we never remove elements from `self.buffers`, so a reference
- // to the data inside any buffer will live as long as `self` does.
- &mut buffers[i]
- }
-
- /// Stores a `Mmap` for the lifetime of this `Stash`, returning a pointer
- /// which is scoped to just this lifetime.
- pub fn cache_mmap(&self, map: Mmap) -> &[u8] {
- // SAFETY: this is the only location for a mutable pointer to
- // `mmaps`, and this structure isn't threadsafe to shared across
- // threads either. We also never remove elements from `self.mmaps`,
- // so a reference to the data inside the map will live as long as
- // `self` does.
- unsafe {
- let mmaps = &mut *self.mmaps.get();
- mmaps.push(map);
- mmaps.last().unwrap()
- }
- }
-}