bjoernager/rust
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Add fine-grained LLVM CFI support to the Rust compiler

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This commit improves the LLVM Control Flow Integrity (CFI) support in
the Rust compiler by providing forward-edge control flow protection for
Rust-compiled code only by aggregating function pointers in groups
identified by their return and parameter types.

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) will be provided in later work as
part of this project by identifying C char and integer type uses at the
time types are encoded (see Type metadata in the design document in the
tracking issue #89653).

LLVM CFI can be enabled with -Zsanitizer=cfi and requires LTO (i.e.,
-Clto).
This commit is contained in:
Ramon de C Valle 2022-03-31 22:50:41 -07:00
parent 5b8cf49c51
commit 5ad7a646a5
24 changed files with 1647 additions and 136 deletions
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2
compiler/rustc_codegen_llvm/Cargo.toml
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@ -18,7 +18,6 @@ rustc_middle = { path = "../rustc_middle" }
rustc-demangle = "0.1.21"
rustc_attr = { path = "../rustc_attr" }
rustc_codegen_ssa = { path = "../rustc_codegen_ssa" }
rustc_symbol_mangling = { path = "../rustc_symbol_mangling" }
rustc_data_structures = { path = "../rustc_data_structures" }
rustc_errors = { path = "../rustc_errors" }
rustc_fs_util = { path = "../rustc_fs_util" }
@ -30,6 +29,7 @@ rustc_metadata = { path = "../rustc_metadata" }
rustc_query_system = { path = "../rustc_query_system" }
rustc_session = { path = "../rustc_session" }
rustc_serialize = { path = "../rustc_serialize" }
rustc_symbol_mangling = { path = "../rustc_symbol_mangling" }
rustc_target = { path = "../rustc_target" }
smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
rustc_ast = { path = "../rustc_ast" }