Add cross-language LLVM CFI support to the Rust compiler
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).
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70 changed files with 1384 additions and 387 deletions
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@ -1036,6 +1036,14 @@ fn default_configuration(sess: &Session) -> CrateConfig {
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ret.insert((sym::sanitize, Some(symbol)));
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}
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if sess.is_sanitizer_cfi_generalize_pointers_enabled() {
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ret.insert((sym::sanitizer_cfi_generalize_pointers, None));
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}
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if sess.is_sanitizer_cfi_normalize_integers_enabled() {
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ret.insert((sym::sanitizer_cfi_normalize_integers, None));
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}
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if sess.opts.debug_assertions {
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ret.insert((sym::debug_assertions, None));
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}
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