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SDK: Allow integer math in bump allocator

This commit is contained in:
Trent Nelson 2021-02-16 14:40:49 -07:00 committed by Trent Nelson
parent 854e6766ce
commit 12399157f5
1 changed files with 9 additions and 1 deletions
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10
sdk/program/src/entrypoint.rs
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@ -1,4 +1,3 @@
#![allow(clippy::integer_arithmetic)]
//! @brief Solana Rust-based BPF program entry point supported by the latest //! @brief Solana Rust-based BPF program entry point supported by the latest
//! BPFLoader. For more information see './bpf_loader.rs' //! BPFLoader. For more information see './bpf_loader.rs'
@ -104,6 +103,10 @@ pub struct BumpAllocator {
pub start: usize, pub start: usize,
pub len: usize, pub len: usize,
} }
/// Integer arithmetic in this global allocator implementation is safe when
/// operating on the prescribed `HEAP_START_ADDRESS` and `HEAP_LENGTH`. Any
/// other use may overflow and is thus unsupported and at one's own risk.
#[allow(clippy::integer_arithmetic)]
unsafe impl std::alloc::GlobalAlloc for BumpAllocator { unsafe impl std::alloc::GlobalAlloc for BumpAllocator {
#[inline] #[inline]
unsafe fn alloc(&self, layout: Layout) -> *mut u8 { unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
@ -133,6 +136,11 @@ pub const MAX_PERMITTED_DATA_INCREASE: usize = 1_024 * 10;
/// Deserialize the input arguments /// Deserialize the input arguments
/// ///
/// The integer arithmetic in this method is safe when called on a buffer that was
/// serialized by runtime. Use with buffers serialized otherwise is unsupported and
/// done at one's own risk.
#[allow(clippy::integer_arithmetic)]
///
/// # Safety /// # Safety
#[allow(clippy::type_complexity)] #[allow(clippy::type_complexity)]
pub unsafe fn deserialize<'a>(input: *mut u8) -> (&'a Pubkey, Vec<AccountInfo<'a>>, &'a [u8]) { pub unsafe fn deserialize<'a>(input: *mut u8) -> (&'a Pubkey, Vec<AccountInfo<'a>>, &'a [u8]) {