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Add support for tracking origins of uninitialized memory

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This commit is contained in:
Tomasz Miąsko 2019-11-16 00:00:00 +00:00
parent 9b90703289
commit 0812eebc4a
4 changed files with 53 additions and 2 deletions
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28
src/test/codegen/sanitizer-memory-track-orgins.rs Normal file
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// Verifies that MemorySanitizer track-origins level can be controlled
// with -Zsanitizer-memory-track-origins option.
//
// needs-sanitizer-support
// only-linux
// only-x86_64
// revisions:MSAN-0 MSAN-1 MSAN-2
//
//[MSAN-0] compile-flags: -Zsanitizer=memory
//[MSAN-1] compile-flags: -Zsanitizer=memory -Zsanitizer-memory-track-origins=1
//[MSAN-2] compile-flags: -Zsanitizer=memory -Zsanitizer-memory-track-origins
#![crate_type="lib"]
// MSAN-0-NOT: @__msan_track_origins
// MSAN-1: @__msan_track_origins = weak_odr local_unnamed_addr constant i32 1
// MSAN-2: @__msan_track_origins = weak_odr local_unnamed_addr 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;
}