71c7313f42
This commit adds a new option (i.e., `-fsanitize-cfi-icall-normalize-integers`) for normalizing integer types as vendor extended types for cross-language LLVM CFI/KCFI support with other languages that can't represent and encode C/C++ integer types. Specifically, integer types are encoded as their defined representations (e.g., 8-bit signed integer, 16-bit signed integer, 32-bit signed integer, ...) for compatibility with languages that define explicitly-sized integer types (e.g., i8, i16, i32, ..., in Rust). ``-fsanitize-cfi-icall-normalize-integers`` is compatible with ``-fsanitize-cfi-icall-generalize-pointers``. This helps with providing cross-language CFI support with the Rust compiler and is an alternative solution for the issue described and alternatives proposed in the RFC https://github.com/rust-lang/rfcs/pull/3296. For more information about LLVM CFI/KCFI and cross-language LLVM CFI/KCFI support for the Rust compiler, see the design document in the tracking issue https://github.com/rust-lang/rust/issues/89653. Relands b1e9ab7438a098a18fecda88fc87ef4ccadfcf1e with fixes. Reviewed By: pcc, samitolvanen Differential Revision: https://reviews.llvm.org/D139395
30 lines
1.4 KiB
C
30 lines
1.4 KiB
C
// RUN: %clang_cc1 -triple x86_64-unknown-linux -fsanitize=cfi-icall -fsanitize-trap=cfi-icall -fsanitize-cfi-icall-experimental-normalize-integers -emit-llvm -o - %s | FileCheck %s
|
|
|
|
// Test that normalized type metadata for functions are emitted for cross-language CFI support with
|
|
// other languages that can't represent and encode C/C++ integer types.
|
|
|
|
void foo(void (*fn)(int), int arg) {
|
|
// CHECK-LABEL: define{{.*}}foo
|
|
// CHECK-SAME: {{.*}}!type ![[TYPE1:[0-9]+]] !type !{{[0-9]+}}
|
|
// CHECK: call i1 @llvm.type.test({{i8\*|ptr}} {{%f|%0}}, metadata !"_ZTSFvu3i32E.normalized")
|
|
fn(arg);
|
|
}
|
|
|
|
void bar(void (*fn)(int, int), int arg1, int arg2) {
|
|
// CHECK-LABEL: define{{.*}}bar
|
|
// CHECK-SAME: {{.*}}!type ![[TYPE2:[0-9]+]] !type !{{[0-9]+}}
|
|
// CHECK: call i1 @llvm.type.test({{i8\*|ptr}} {{%f|%0}}, metadata !"_ZTSFvu3i32S_E.normalized")
|
|
fn(arg1, arg2);
|
|
}
|
|
|
|
void baz(void (*fn)(int, int, int), int arg1, int arg2, int arg3) {
|
|
// CHECK-LABEL: define{{.*}}baz
|
|
// CHECK-SAME: {{.*}}!type ![[TYPE3:[0-9]+]] !type !{{[0-9]+}}
|
|
// CHECK: call i1 @llvm.type.test({{i8\*|ptr}} {{%f|%0}}, metadata !"_ZTSFvu3i32S_S_E.normalized")
|
|
fn(arg1, arg2, arg3);
|
|
}
|
|
|
|
// CHECK: ![[TYPE1]] = !{i64 0, !"_ZTSFvPFvu3i32ES_E.normalized"}
|
|
// CHECK: ![[TYPE2]] = !{i64 0, !"_ZTSFvPFvu3i32S_ES_S_E.normalized"}
|
|
// CHECK: ![[TYPE3]] = !{i64 0, !"_ZTSFvPFvu3i32S_S_ES_S_S_E.normalized"}
|