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004aa15b47
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).
20 lines
826 B
Rust
20 lines
826 B
Rust
// Verifies that pointer type membership tests for indirect calls are emitted.
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//
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// needs-sanitizer-cfi
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// compile-flags: -Clto -Cno-prepopulate-passes -Ctarget-feature=-crt-static -Zsanitizer=cfi -Copt-level=0
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#![crate_type="lib"]
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pub fn foo(f: fn(i32) -> i32, arg: i32) -> i32 {
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// CHECK-LABEL: define{{.*}}foo{{.*}}!type !{{[0-9]+}} !type !{{[0-9]+}} !type !{{[0-9]+}} !type !{{[0-9]+}}
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// CHECK: start:
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// CHECK: [[TT:%.+]] = call i1 @llvm.type.test({{i8\*|ptr}} {{%f|%0}}, metadata !"{{[[:print:]]+}}")
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// CHECK-NEXT: br i1 [[TT]], label %type_test.pass, label %type_test.fail
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// CHECK: type_test.pass:
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// CHECK-NEXT: {{%.+}} = call i32 %f(i32 %arg)
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// CHECK: type_test.fail:
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// CHECK-NEXT: call void @llvm.trap()
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// CHECK-NEXT: unreachable
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f(arg)
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}
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