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[MSAN] Never allow checking calls to __sanitizer_unaligned_{load,store}
These functions expect the caller to always pass shadows over TLS. Differential Revision: https://reviews.llvm.org/D84351
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llvm/test/Instrumentation/MemorySanitizer/no-check-rt-unaligned.ll
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; RUN: opt < %s -msan-eager-checks -msan-check-access-address=0 -S -passes=msan 2>&1 | FileCheck %s | ||
; RUN: opt < %s -msan-eager-checks -msan-check-access-address=0 -msan-track-origins=2 -S -passes=msan 2>&1 | FileCheck %s -check-prefixes=CHECK,CHECK-ORIGIN | ||
; RUN: opt < %s -msan-eager-checks -msan -msan-check-access-address=0 -S | FileCheck %s | ||
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" | ||
target triple = "x86_64-unknown-linux-gnu" | ||
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declare noundef i8 @__sanitizer_unaligned_load8(i8* noundef) | ||
declare void @__sanitizer_unaligned_store8(i8* noundef, i8 noundef) | ||
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define noundef i8 @unaligned_load(i8* noundef %ptr) sanitize_memory { | ||
; CHECK: @unaligned_load(i8* {{.*}}[[PTR:%.+]]) | ||
; CHECK: store i64 0, {{.*}} @__msan_param_tls | ||
; CHECK: [[VAL:%.*]] = call noundef i8 @__sanitizer_unaligned_load8(i8* noundef [[PTR]]) | ||
%val = call noundef i8 @__sanitizer_unaligned_load8(i8* noundef %ptr) | ||
; CHECK: load {{.*}} @__msan_retval_tls | ||
; CHECK-ORIGIN: load {{.*}} @__msan_retval_origin_tls | ||
; CHECK: call void @__msan_warning_{{.*}}noreturn | ||
; CHECK: ret i8 [[VAL]] | ||
ret i8 %val | ||
} | ||
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define void @unaligned_store(i8* noundef %ptr, i8 noundef %val) sanitize_memory { | ||
; CHECK: @unaligned_store(i8* {{.*}}[[PTR:%.+]], i8 {{.*}}[[VAL:%.+]]) | ||
; CHECK: store i64 0, {{.*}} @__msan_param_tls | ||
; CHECK: store i8 0, {{.*}} @__msan_param_tls | ||
; CHECK: call void @__sanitizer_unaligned_store8(i8* noundef [[PTR]], i8 noundef [[VAL]]) | ||
call void @__sanitizer_unaligned_store8(i8* noundef %ptr, i8 noundef %val) | ||
; CHECK: ret void | ||
ret void | ||
} |