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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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8
compiler/rustc_session/src/config.rs
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@ -1036,6 +1036,14 @@ fn default_configuration(sess: &Session) -> CrateConfig {
ret.insert((sym::sanitize, Some(symbol)));
}
if sess.is_sanitizer_cfi_generalize_pointers_enabled() {
ret.insert((sym::sanitizer_cfi_generalize_pointers, None));
}
if sess.is_sanitizer_cfi_normalize_integers_enabled() {
ret.insert((sym::sanitizer_cfi_normalize_integers, None));
}
if sess.opts.debug_assertions {
ret.insert((sym::debug_assertions, None));
}