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| author | bjorn3 <bjorn3@users.noreply.github.com> | 2021-04-03 14:51:05 +0200 |
|---|---|---|
| committer | bjorn3 <bjorn3@users.noreply.github.com> | 2021-04-03 14:51:05 +0200 |
| commit | bda6d1f158a71efe84d86da2011eac0c45a232c5 (patch) | |
| tree | ed79a1634dc89af429e193096495dc6aaad7a823 /compiler/rustc_data_structures | |
| parent | 5773e516787a90df4ed014cd20eed0226a1f63cd (diff) | |
| download | rust-bda6d1f158a71efe84d86da2011eac0c45a232c5.tar.gz rust-bda6d1f158a71efe84d86da2011eac0c45a232c5.zip | |
Add safety comment to StableAddress impl for Mmap
Diffstat (limited to 'compiler/rustc_data_structures')
| -rw-r--r-- | compiler/rustc_data_structures/src/memmap.rs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/compiler/rustc_data_structures/src/memmap.rs b/compiler/rustc_data_structures/src/memmap.rs index 29e999efeb1..26b26415eea 100644 --- a/compiler/rustc_data_structures/src/memmap.rs +++ b/compiler/rustc_data_structures/src/memmap.rs @@ -40,4 +40,8 @@ impl Deref for Mmap { } } +// SAFETY: On architectures other than WASM, mmap is used as backing storage. The address of this +// memory map is stable. On WASM, `Vec<u8>` is used as backing storage. The `Mmap` type doesn't +// export any function that can cause the `Vec` to be re-allocated. As such the address of the +// bytes inside this `Vec` is stable. unsafe impl StableAddress for Mmap {} |