diff options
Diffstat (limited to 'compiler/rustc_data_structures/src')
| -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 {} |