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Rollup merge of #105452 - rcvalle:rust-cfi-3, r=bjorn3

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Add cross-language LLVM CFI support to the Rust compiler

This PR 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).

Thank you again, ``@bjorn3,`` ``@nikic,`` ``@samitolvanen,`` and the Rust community for all the help!
This commit is contained in:
Manish Goregaokar 2023-05-03 16:42:48 -07:00 • committed by GitHub
commit 38bbc39895
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72 changed files with 1509 additions and 403 deletions
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4
compiler/rustc_span/src/symbol.rs
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@ -443,6 +443,7 @@ symbols! {
c_str,
c_unwind,
c_variadic,
c_void,
call,
call_mut,
call_once,
@ -470,6 +471,7 @@ symbols! {
cfg_target_vendor,
cfg_version,
cfi,
cfi_encoding,
char,
client,
clippy,
@ -1323,6 +1325,8 @@ symbols! {
s,
safety,
sanitize,
sanitizer_cfi_generalize_pointers,
sanitizer_cfi_normalize_integers,
sanitizer_runtime,
saturating_add,
saturating_sub,