diff --git a/llvm/test/Instrumentation/MemorySanitizer/byval.ll b/llvm/test/Instrumentation/MemorySanitizer/byval.ll new file mode 100644 --- /dev/null +++ b/llvm/test/Instrumentation/MemorySanitizer/byval.ll @@ -0,0 +1,97 @@ +; RUN: opt < %s -S -passes="msan" 2>&1 | FileCheck %s --implicit-check-not "call void @llvm.mem" --implicit-check-not " load" --implicit-check-not " store" +; RUN: opt < %s -S -msan -msan-track-origins=1 | FileCheck %s --implicit-check-not "call void @llvm.mem" --implicit-check-not " load" --implicit-check-not " store" + +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" + +declare void @FnByVal(i128* byval(i128) %p); +declare void @Fn(i128* %p); + +define i128 @ByValArgument(i32, i128* byval(i128) %p) sanitize_memory { +; CHECK-LABEL: @ByValArgument( +; CHECK-NEXT: entry: +; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}} @__msan_param_tls to i64), i64 8) to i8*), i64 16, i1 false) +; CHECK: load i32, i32* inttoptr (i64 add (i64 ptrtoint ([200 x i32]* @__msan_param_origin_tls to i64), i64 8) to i32*) +; CHECK: %x = load i128, i128* %p +; CHECK: load i128 +; CHECK: load i32 +; CHECK: store i128 {{.*}}, i128* bitcast ([100 x i64]* @__msan_retval_tls to i128*) +; CHECK-NEXT: store i32 {{.*}}, i32* @__msan_retval_origin_tls +; CHECK-NEXT: ret i128 +; +entry: + %x = load i128, i128* %p + ret i128 %x +} + +define i128 @ByValArgumentNoSanitize(i32, i128* byval(i128) %p) { +; CHECK-LABEL: @ByValArgumentNoSanitize( +; CHECK-NEXT: entry: +; CHECK: %x = load i128, i128* %p +; CHECK: store i128 0, i128* bitcast ([100 x i64]* @__msan_retval_tls to i128*) +; CHECK-NEXT: store i32 0, i32* @__msan_retval_origin_tls +; CHECK-NEXT: ret i128 +; +entry: + %x = load i128, i128* %p + ret i128 %x +} + +; FIXME: Origin of byval pointee is not propagated. +define void @ByValForward(i32, i128* byval(i128) %p) sanitize_memory { +; CHECK-LABEL: @ByValForward( +; CHECK-NEXT: entry: +; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}} @__msan_param_tls to i64), i64 8) to i8*), i64 16, i1 false) +; CHECK: load i32, i32* inttoptr (i64 add (i64 ptrtoint ([200 x i32]* @__msan_param_origin_tls to i64), i64 8) to i32*) +; CHECK: store i64 0, i64* getelementptr inbounds ([100 x i64], [100 x i64]* @__msan_param_tls, i32 0, i32 0) +; CHECK-NEXT: call void @Fn( +; CHECK-NEXT: ret void +; +entry: + call void @Fn(i128* %p) + ret void +} + +; FIXME: Shadow of byval pointee is copied but not reset. +define void @ByValForwardNoSanitize(i32, i128* byval(i128) %p) { +; CHECK-LABEL: @ByValForwardNoSanitize( +; CHECK-NEXT: entry: +; CHECK: store i64 0, i64* getelementptr inbounds ([100 x i64], [100 x i64]* @__msan_param_tls, i32 0, i32 0) +; CHECK-NEXT: call void @Fn( +; CHECK-NEXT: ret void +; +entry: + call void @Fn(i128* %p) + ret void +} + +; FIXME: Origin of %p byval pointee is not propagated. +define void @ByValForwardByVal(i32, i128* byval(i128) %p) sanitize_memory { +; CHECK-LABEL: @ByValForwardByVal( +; CHECK-NEXT: entry: +; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}} @__msan_param_tls to i64), i64 8) to i8*), i64 16, i1 false) +; CHECK: load i32, i32* inttoptr (i64 add (i64 ptrtoint ([200 x i32]* @__msan_param_origin_tls to i64), i64 8) to i32*) +; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* bitcast ([100 x i64]* @__msan_param_tls to i8*), i8* {{.*}}, i64 16, i1 false) +; CHECK: store i32 {{.*}}, i32* getelementptr inbounds ([200 x i32], [200 x i32]* @__msan_param_origin_tls, i32 0, i32 0) +; CHECK-NEXT: call void @FnByVal( +; CHECK-NEXT: ret void +; +entry: + call void @FnByVal(i128* byval(i128) %p) + ret void +} + +; FIXME: Shadow of byval pointee is copied but not reset. +define void @ByValForwardByValNoSanitize(i32, i128* byval(i128) %p) { +; CHECK-LABEL: @ByValForwardByValNoSanitize( +; CHECK-NEXT: entry: +; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* bitcast ([100 x i64]* @__msan_param_tls to i8*), i8* {{.*}}, i64 16, i1 false) +; CHECK: store i32 0, i32* getelementptr inbounds ([200 x i32], [200 x i32]* @__msan_param_origin_tls, i32 0, i32 0) +; CHECK-NEXT: call void @FnByVal( +; CHECK-NEXT: ret void +; +entry: + call void @FnByVal(i128* byval(i128) %p) + ret void +} +