37 lines
1.7 KiB
C
37 lines
1.7 KiB
C
// RUN: %clang_cc1 -triple x86_64-linux-gnu -S -emit-llvm -O2 -fsanitize=kernel-memory -no-enable-noundef-analysis -o - %s | \
|
|
// RUN: FileCheck %s --check-prefix=CLEAN
|
|
// RUN: %clang_cc1 -triple x86_64-linux-gnu -S -emit-llvm -O2 -fsanitize=kernel-memory -fno-sanitize-memory-param-retval -o - %s | \
|
|
// RUN: FileCheck %s --check-prefixes=NOUNDEF,NOUNDEF_ONLY
|
|
// RUN: %clang_cc1 -triple x86_64-linux-gnu -S -emit-llvm -O2 -fsanitize=kernel-memory -mllvm -msan-eager-checks -o - %s | \
|
|
// RUN: FileCheck %s --check-prefixes=NOUNDEF,EAGER
|
|
// RUN: %clang_cc1 -triple x86_64-linux-gnu -S -emit-llvm -O2 -fsanitize=kernel-memory -no-enable-noundef-analysis -fsanitize-memory-param-retval -o - %s | \
|
|
// RUN: FileCheck %s --check-prefixes=CLEAN
|
|
// RUN: %clang_cc1 -triple x86_64-linux-gnu -S -emit-llvm -O2 -fsanitize=kernel-memory -o - %s | \
|
|
// RUN: FileCheck %s --check-prefixes=NOUNDEF,EAGER
|
|
|
|
void foo();
|
|
|
|
void bar(int x) {
|
|
if (x)
|
|
foo();
|
|
}
|
|
|
|
|
|
// CLEAN: define dso_local void @bar(i32 %x)
|
|
// NOUNDEF: define dso_local void @bar(i32 noundef %x)
|
|
//
|
|
// %param_shadow assignment gets optimized away with -O2, because it is at the beginning of the
|
|
// struct returned by __msan_get_context_state(). Use %param_origin as a sign that the shadow of
|
|
// the first argument is being used.
|
|
//
|
|
// Without noundef analysis, KMSAN emits metadata checks for the function parameter.
|
|
// CLEAN: load i32, ptr %param_origin
|
|
//
|
|
// With noundef analysis enabled, but without eager checks, KMSAN still emits metadata checks,
|
|
// although the parameter is known to be defined.
|
|
// NOUNDEF_ONLY: load i32, ptr %param_origin
|
|
//
|
|
// With noundef analysis and eager checks enabled, KMSAN won't emit metadata checks for function
|
|
// parameters.
|
|
// EAGER-NOT: load i32, ptr %param_origin
|