diff options
| -rw-r--r-- | compiler/rustc_abi/src/layout.rs | 9 | ||||
| -rw-r--r-- | compiler/rustc_abi/src/lib.rs | 7 | ||||
| -rw-r--r-- | compiler/rustc_data_structures/src/hashes.rs | 5 | ||||
| -rw-r--r-- | compiler/rustc_middle/src/ty/layout.rs | 3 | ||||
| -rw-r--r-- | compiler/rustc_middle/src/ty/mod.rs | 3 | ||||
| -rw-r--r-- | compiler/rustc_ty_utils/src/layout.rs | 13 |
6 files changed, 25 insertions, 15 deletions
diff --git a/compiler/rustc_abi/src/layout.rs b/compiler/rustc_abi/src/layout.rs index b8773f9ff38..9e33824afe2 100644 --- a/compiler/rustc_abi/src/layout.rs +++ b/compiler/rustc_abi/src/layout.rs @@ -2,6 +2,7 @@ use std::fmt::{self, Write}; use std::ops::{Bound, Deref}; use std::{cmp, iter}; +use rustc_data_structures::stable_hasher::Hash64; use rustc_index::Idx; use tracing::debug; @@ -133,7 +134,7 @@ impl<Cx: HasDataLayout> LayoutCalculator<Cx> { size, max_repr_align: None, unadjusted_abi_align: align.abi, - randomization_seed: combined_seed, + randomization_seed: Hash64::new(combined_seed), } } @@ -226,7 +227,7 @@ impl<Cx: HasDataLayout> LayoutCalculator<Cx> { size: Size::ZERO, max_repr_align: None, unadjusted_abi_align: dl.i8_align.abi, - randomization_seed: 0, + randomization_seed: Hash64::ZERO, } } @@ -1058,7 +1059,7 @@ impl<Cx: HasDataLayout> LayoutCalculator<Cx> { // unsizable tail fields are excluded so that we use the same seed for the sized and unsized layouts. let field_seed = fields_excluding_tail .iter() - .fold(0u64, |acc, f| acc.wrapping_add(f.randomization_seed)); + .fold(Hash64::ZERO, |acc, f| acc.wrapping_add(f.randomization_seed)); if optimize_field_order && fields.len() > 1 { // If `-Z randomize-layout` was enabled for the type definition we can shuffle @@ -1072,7 +1073,7 @@ impl<Cx: HasDataLayout> LayoutCalculator<Cx> { // `ReprOptions.field_shuffle_seed` is a deterministic seed we can use to randomize field // ordering. let mut rng = rand_xoshiro::Xoshiro128StarStar::seed_from_u64( - field_seed.wrapping_add(repr.field_shuffle_seed), + field_seed.wrapping_add(repr.field_shuffle_seed).as_u64(), ); // Shuffle the ordering of the fields. diff --git a/compiler/rustc_abi/src/lib.rs b/compiler/rustc_abi/src/lib.rs index da1c706d67c..d3847e5f272 100644 --- a/compiler/rustc_abi/src/lib.rs +++ b/compiler/rustc_abi/src/lib.rs @@ -48,6 +48,7 @@ use std::ops::{Add, AddAssign, Mul, RangeInclusive, Sub}; use std::str::FromStr; use bitflags::bitflags; +use rustc_data_structures::stable_hasher::Hash64; #[cfg(feature = "nightly")] use rustc_data_structures::stable_hasher::StableOrd; use rustc_index::{Idx, IndexSlice, IndexVec}; @@ -140,7 +141,7 @@ pub struct ReprOptions { /// hash without loss, but it does pay the price of being larger. /// Everything's a tradeoff, a 64-bit seed should be sufficient for our /// purposes (primarily `-Z randomize-layout`) - pub field_shuffle_seed: u64, + pub field_shuffle_seed: Hash64, } impl ReprOptions { @@ -1727,7 +1728,7 @@ pub struct LayoutData<FieldIdx: Idx, VariantIdx: Idx> { /// transmuted to `Foo<U>` we aim to create probalistically distinct seeds so that Foo can choose /// to reorder its fields based on that information. The current implementation is a conservative /// approximation of this goal. - pub randomization_seed: u64, + pub randomization_seed: Hash64, } impl<FieldIdx: Idx, VariantIdx: Idx> LayoutData<FieldIdx, VariantIdx> { @@ -1781,7 +1782,7 @@ impl<FieldIdx: Idx, VariantIdx: Idx> LayoutData<FieldIdx, VariantIdx> { align, max_repr_align: None, unadjusted_abi_align: align.abi, - randomization_seed, + randomization_seed: Hash64::new(randomization_seed), } } } diff --git a/compiler/rustc_data_structures/src/hashes.rs b/compiler/rustc_data_structures/src/hashes.rs index 8f4639fc2e6..b25758048bd 100644 --- a/compiler/rustc_data_structures/src/hashes.rs +++ b/compiler/rustc_data_structures/src/hashes.rs @@ -35,6 +35,11 @@ impl Hash64 { pub fn as_u64(self) -> u64 { self.inner } + + #[inline] + pub fn wrapping_add(self, other: Self) -> Self { + Self { inner: self.inner.wrapping_add(other.inner) } + } } impl BitXorAssign<u64> for Hash64 { diff --git a/compiler/rustc_middle/src/ty/layout.rs b/compiler/rustc_middle/src/ty/layout.rs index e5a4e38c875..2e90e5251e2 100644 --- a/compiler/rustc_middle/src/ty/layout.rs +++ b/compiler/rustc_middle/src/ty/layout.rs @@ -7,6 +7,7 @@ use rustc_abi::{ PointeeInfo, PointerKind, Primitive, ReprOptions, Scalar, Size, TagEncoding, TargetDataLayout, TyAbiInterface, VariantIdx, Variants, }; +use rustc_data_structures::stable_hasher::Hash64; use rustc_error_messages::DiagMessage; use rustc_errors::{ Diag, DiagArgValue, DiagCtxtHandle, Diagnostic, EmissionGuarantee, IntoDiagArg, Level, @@ -778,7 +779,7 @@ where size: Size::ZERO, max_repr_align: None, unadjusted_abi_align: tcx.data_layout.i8_align.abi, - randomization_seed: 0, + randomization_seed: Hash64::ZERO, }) } diff --git a/compiler/rustc_middle/src/ty/mod.rs b/compiler/rustc_middle/src/ty/mod.rs index 52cb8f57a88..cb5b5948e6f 100644 --- a/compiler/rustc_middle/src/ty/mod.rs +++ b/compiler/rustc_middle/src/ty/mod.rs @@ -1487,8 +1487,7 @@ impl<'tcx> TyCtxt<'tcx> { // Generate a deterministically-derived seed from the item's path hash // to allow for cross-crate compilation to actually work - let mut field_shuffle_seed = - self.def_path_hash(did.to_def_id()).0.to_smaller_hash().as_u64(); + let mut field_shuffle_seed = self.def_path_hash(did.to_def_id()).0.to_smaller_hash(); // If the user defined a custom seed for layout randomization, xor the item's // path hash with the user defined seed, this will allowing determinism while diff --git a/compiler/rustc_ty_utils/src/layout.rs b/compiler/rustc_ty_utils/src/layout.rs index ee271048fc1..6a67009fe90 100644 --- a/compiler/rustc_ty_utils/src/layout.rs +++ b/compiler/rustc_ty_utils/src/layout.rs @@ -9,6 +9,7 @@ use rustc_abi::{ HasDataLayout, Layout, LayoutCalculatorError, LayoutData, Niche, ReprOptions, Scalar, Size, StructKind, TagEncoding, VariantIdx, Variants, WrappingRange, }; +use rustc_data_structures::stable_hasher::Hash64; use rustc_index::bit_set::DenseBitSet; use rustc_index::{IndexSlice, IndexVec}; use rustc_middle::bug; @@ -380,7 +381,7 @@ fn layout_of_uncached<'tcx>( size, max_repr_align: None, unadjusted_abi_align: element.align.abi, - randomization_seed: element.randomization_seed.wrapping_add(count), + randomization_seed: element.randomization_seed.wrapping_add(Hash64::new(count)), }) } ty::Slice(element) => { @@ -395,7 +396,9 @@ fn layout_of_uncached<'tcx>( max_repr_align: None, unadjusted_abi_align: element.align.abi, // adding a randomly chosen value to distinguish slices - randomization_seed: element.randomization_seed.wrapping_add(0x2dcba99c39784102), + randomization_seed: element + .randomization_seed + .wrapping_add(Hash64::new(0x2dcba99c39784102)), }) } ty::Str => tcx.mk_layout(LayoutData { @@ -408,7 +411,7 @@ fn layout_of_uncached<'tcx>( max_repr_align: None, unadjusted_abi_align: dl.i8_align.abi, // another random value - randomization_seed: 0xc1325f37d127be22, + randomization_seed: Hash64::new(0xc1325f37d127be22), }), // Odd unit types. @@ -585,7 +588,7 @@ fn layout_of_uncached<'tcx>( align, max_repr_align: None, unadjusted_abi_align: align.abi, - randomization_seed: e_ly.randomization_seed.wrapping_add(e_len), + randomization_seed: e_ly.randomization_seed.wrapping_add(Hash64::new(e_len)), }) } @@ -1051,7 +1054,7 @@ fn coroutine_layout<'tcx>( }; // this is similar to how ReprOptions populates its field_shuffle_seed - let def_hash = tcx.def_path_hash(def_id).0.to_smaller_hash().as_u64(); + let def_hash = tcx.def_path_hash(def_id).0.to_smaller_hash(); let layout = tcx.mk_layout(LayoutData { variants: Variants::Multiple { |