c4842bb2e9
Introduces the frontend flag -fexperimental-sanitize-metadata=, which enables SanitizerBinaryMetadata instrumentation. The first intended user of the binary metadata emitted will be a variant of GWP-TSan [1]. The plan is to open source a stable and production quality version of GWP-TSan. The development of which, however, requires upstream compiler support. [1] https://llvm.org/devmtg/2020-09/slides/Morehouse-GWP-Tsan.pdf Until the tool has been open sourced, we mark this kind of instrumentation as "experimental", and reserve the option to change binary format, remove features, and similar. Reviewed By: vitalybuka, MaskRay Differential Revision: https://reviews.llvm.org/D130888
32 lines
1.6 KiB
C
32 lines
1.6 KiB
C
// RUN: %clang_cc1 -O -fexperimental-sanitize-metadata=atomics -triple x86_64-gnu-linux -x c -S -emit-llvm %s -o - | FileCheck %s --check-prefixes=CHECK,ATOMICS
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// RUN: %clang_cc1 -O -fexperimental-sanitize-metadata=atomics -triple aarch64-gnu-linux -x c -S -emit-llvm %s -o - | FileCheck %s --check-prefixes=CHECK,ATOMICS
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int x, y;
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void empty() {
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// CHECK-NOT: define dso_local void @empty() {{.*}} !pcsections
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}
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int atomics() {
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// ATOMICS-LABEL: define dso_local i32 @atomics()
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// ATOMICS-SAME: !pcsections ![[ATOMICS_COVERED:[0-9]+]]
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// ATOMICS-NEXT: entry:
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// ATOMICS-NEXT: atomicrmw add {{.*}} !pcsections ![[ATOMIC_OP:[0-9]+]]
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// ATOMICS-NOT: load {{.*}} !pcsections
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__atomic_fetch_add(&x, 1, __ATOMIC_RELAXED);
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return y;
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}
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// ATOMICS-LABEL: __sanitizer_metadata_atomics.module_ctor
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// ATOMICS: call void @__sanitizer_metadata_atomics_add(i32 1, ptr @__start_sanmd_atomics, ptr @__stop_sanmd_atomics)
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// ATOMICS-LABEL: __sanitizer_metadata_atomics.module_dtor
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// ATOMICS: call void @__sanitizer_metadata_atomics_del(i32 1, ptr @__start_sanmd_atomics, ptr @__stop_sanmd_atomics)
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// CHECK-LABEL: __sanitizer_metadata_covered.module_ctor
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// CHECK: call void @__sanitizer_metadata_covered_add(i32 1, ptr @__start_sanmd_covered, ptr @__stop_sanmd_covered)
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// CHECK-LABEL: __sanitizer_metadata_covered.module_dtor
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// CHECK: call void @__sanitizer_metadata_covered_del(i32 1, ptr @__start_sanmd_covered, ptr @__stop_sanmd_covered)
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// ATOMICS: ![[ATOMICS_COVERED]] = !{!"sanmd_covered", ![[ATOMICS_COVERED_AUX:[0-9]+]]}
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// ATOMICS: ![[ATOMICS_COVERED_AUX]] = !{i32 1}
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// ATOMICS: ![[ATOMIC_OP]] = !{!"sanmd_atomics"}
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