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Add cross-language LLVM CFI support to the Rust compiler

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This commit adds cross-language LLVM Control Flow Integrity (CFI)
support to the Rust compiler by adding the
`-Zsanitizer-cfi-normalize-integers` option to be used with Clang
`-fsanitize-cfi-icall-normalize-integers` for normalizing integer types
(see https://reviews.llvm.org/D139395).

It provides forward-edge control flow protection for C or C++ and Rust
-compiled code "mixed binaries" (i.e., for when C or C++ and Rust
-compiled code share the same virtual address space). For more
information about LLVM CFI and cross-language LLVM CFI support for the
Rust compiler, see design document in the tracking issue #89653.

Cross-language LLVM CFI can be enabled with -Zsanitizer=cfi and
-Zsanitizer-cfi-normalize-integers, and requires proper (i.e.,
non-rustc) LTO (i.e., -Clinker-plugin-lto).
This commit is contained in:
Ramon de C Valle 2022-12-12 22:42:44 -08:00
parent fec9adcdbc
commit 004aa15b47
70 changed files with 1384 additions and 387 deletions
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1
compiler/rustc_hir/src/lang_items.rs
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@ -226,6 +226,7 @@ language_item_table! {
PartialEq, sym::eq, eq_trait, Target::Trait, GenericRequirement::Exact(1);
PartialOrd, sym::partial_ord, partial_ord_trait, Target::Trait, GenericRequirement::Exact(1);
CVoid, sym::c_void, c_void, Target::Enum, GenericRequirement::None;
// A number of panic-related lang items. The `panic` item corresponds to divide-by-zero and
// various panic cases with `match`. The `panic_bounds_check` item is for indexing arrays.