derek.holloway
7502bf64a4
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37 lines
1.7 KiB
C
37 lines
1.7 KiB
C
// RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-llvm -O2 -fsanitize=kernel-memory -no-enable-noundef-analysis -o - %s | \
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// RUN: FileCheck %s --check-prefix=CLEAN
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// RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-llvm -O2 -fsanitize=kernel-memory -fno-sanitize-memory-param-retval -o - %s | \
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// RUN: FileCheck %s --check-prefixes=NOUNDEF,NOUNDEF_ONLY
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// RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-llvm -O2 -fsanitize=kernel-memory -mllvm -msan-eager-checks -o - %s | \
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// RUN: FileCheck %s --check-prefixes=NOUNDEF,EAGER
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// RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-llvm -O2 -fsanitize=kernel-memory -no-enable-noundef-analysis -fsanitize-memory-param-retval -o - %s | \
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// RUN: FileCheck %s --check-prefixes=CLEAN
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// RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-llvm -O2 -fsanitize=kernel-memory -o - %s | \
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// RUN: FileCheck %s --check-prefixes=NOUNDEF,EAGER
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void foo();
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void bar(int x) {
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if (x)
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foo();
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}
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// CLEAN: define dso_local void @bar(i32 %x)
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// NOUNDEF: define dso_local void @bar(i32 noundef %x)
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//
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// %param_shadow assignment gets optimized away with -O2, because it is at the beginning of the
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// struct returned by __msan_get_context_state(). Use %param_origin as a sign that the shadow of
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// the first argument is being used.
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//
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// Without noundef analysis, KMSAN emits metadata checks for the function parameter.
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// CLEAN: load i32, ptr %param_origin
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//
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// With noundef analysis enabled, but without eager checks, KMSAN still emits metadata checks,
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// although the parameter is known to be defined.
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// NOUNDEF_ONLY: load i32, ptr %param_origin
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//
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// With noundef analysis and eager checks enabled, KMSAN won't emit metadata checks for function
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// parameters.
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// EAGER-NOT: load i32, ptr %param_origin
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