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Auto merge of #112000 - wesleywiser:safestack, r=Amanieu

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Add support for LLVM SafeStack

Adds support for LLVM [SafeStack] which provides backward edge control
flow protection by separating the stack into two parts: data which is
only accessed in provable safe ways is allocated on the normal stack
(the "safe stack") and all other data is placed in a separate allocation
(the "unsafe stack").

SafeStack support is enabled by passing `-Zsanitizer=safestack`.

[SafeStack]: https://clang.llvm.org/docs/SafeStack.html

cc `@rcvalle` #39699
This commit is contained in:
bors 2023-05-28 04:41:13 +00:00
commit 2560b80a08
14 changed files with 82 additions and 91 deletions
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3
compiler/rustc_codegen_ssa/src/back/link.rs
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@ -1188,6 +1188,9 @@ fn add_sanitizer_libraries(sess: &Session, crate_type: CrateType, linker: &mut d
if sanitizer.contains(SanitizerSet::HWADDRESS) {
link_sanitizer_runtime(sess, linker, "hwasan");
}
if sanitizer.contains(SanitizerSet::SAFESTACK) {
link_sanitizer_runtime(sess, linker, "safestack");
}
}
fn link_sanitizer_runtime(sess: &Session, linker: &mut dyn Linker, name: &str) {