rust/tests/codegen/sanitizer/memory-track-origins.rs

// Verifies that MemorySanitizer track-origins level can be controlled
// with -Zsanitizer-memory-track-origins option.
//
// needs-sanitizer-memory
// revisions:MSAN-0 MSAN-1 MSAN-2 MSAN-1-LTO MSAN-2-LTO
//
// compile-flags: -Zsanitizer=memory -Ctarget-feature=-crt-static
//[MSAN-0] compile-flags:
//[MSAN-1] compile-flags: -Zsanitizer-memory-track-origins=1
//[MSAN-2] compile-flags: -Zsanitizer-memory-track-origins
//[MSAN-1-LTO] compile-flags: -Zsanitizer-memory-track-origins=1 -C lto=fat
//[MSAN-2-LTO] compile-flags: -Zsanitizer-memory-track-origins -C lto=fat

#![crate_type="lib"]

// MSAN-0-NOT: @__msan_track_origins
// MSAN-1:     @__msan_track_origins = weak_odr {{.*}}constant i32 1
// MSAN-2:     @__msan_track_origins = weak_odr {{.*}}constant i32 2
// MSAN-1-LTO: @__msan_track_origins = weak_odr {{.*}}constant i32 1
// MSAN-2-LTO: @__msan_track_origins = weak_odr {{.*}}constant i32 2
//
// MSAN-0-LABEL: define void @copy(
// MSAN-1-LABEL: define void @copy(
// MSAN-2-LABEL: define void @copy(
#[no_mangle]
pub fn copy(dst: &mut i32, src: &i32) {
    // MSAN-0-NOT: call i32 @__msan_chain_origin(
    // MSAN-1-NOT: call i32 @__msan_chain_origin(
    // MSAN-2:     call i32 @__msan_chain_origin(
    *dst = *src;
}