| 1 | // Test -fsanitize-memory-use-after-dtor |
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| 2 | // RUN: %clang_cc1 -fsanitize=memory -fsanitize-memory-use-after-dtor -std=c++11 -triple=x86_64-pc-linux -emit-llvm -o - %s | FileCheck %s |
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| 3 | |
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| 4 | // Sanitizing dtor is emitted in dtor for every class, and only |
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| 5 | // poisons once. |
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| 6 | |
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| 7 | struct Simple { |
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| 8 | int x; |
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| 9 | ~Simple() {} |
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| 10 | }; |
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| 11 | Simple s; |
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| 12 | // Simple internal member is poisoned by compiler-generated dtor |
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| 13 | // CHECK-LABEL: define {{.*}}SimpleD1Ev |
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| 14 | // CHECK: call void {{.*}}SimpleD2Ev |
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| 15 | // CHECK: ret void |
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| 16 | |
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| 17 | struct Inlined { |
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| 18 | int y; |
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| 19 | inline ~Inlined() {} |
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| 20 | }; |
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| 21 | Inlined i; |
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| 22 | // Simple internal member is poisoned by compiler-generated dtor |
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| 23 | // CHECK-LABEL: define {{.*}}InlinedD1Ev |
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| 24 | // CHECK: call void {{.*}}InlinedD2Ev |
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| 25 | // CHECK: ret void |
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| 26 | |
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| 27 | struct Defaulted_Trivial { |
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| 28 | ~Defaulted_Trivial() = default; |
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| 29 | }; |
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| 30 | void create_def_trivial() { |
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| 31 | Defaulted_Trivial def_trivial; |
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| 32 | } |
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| 33 | // The compiler is explicitly signalled to handle object cleanup. |
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| 34 | // No complex member attributes. Compiler destroys inline, so |
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| 35 | // no destructor defined. |
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| 36 | // CHECK-LABEL: define {{.*}}create_def_trivial |
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| 37 | // CHECK-NOT: call {{.*}}Defaulted_Trivial |
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| 38 | // CHECK: ret void |
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| 39 | |
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| 40 | struct Defaulted_Non_Trivial { |
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| 41 | Simple s; |
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| 42 | ~Defaulted_Non_Trivial() = default; |
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| 43 | }; |
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| 44 | Defaulted_Non_Trivial def_non_trivial; |
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| 45 | // Explicitly compiler-generated dtor poisons object. |
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| 46 | // By including a Simple member in the struct, the compiler is |
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| 47 | // forced to generate a non-trivial destructor. |
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| 48 | // CHECK-LABEL: define {{.*}}Defaulted_Non_TrivialD1Ev |
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| 49 | // CHECK: call void {{.*}}Defaulted_Non_TrivialD2 |
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| 50 | // CHECK: ret void |
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| 51 | |
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| 52 | |
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| 53 | // Note: ordering is important. In the emitted bytecode, these |
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| 54 | // second dtors defined after the first. Explicitly checked here |
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| 55 | // to confirm that all invoked dtors have member poisoning |
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| 56 | // instrumentation inserted. |
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| 57 | // CHECK-LABEL: define {{.*}}SimpleD2Ev |
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| 58 | // CHECK-NOT: store i{{[0-9]+}} 0, {{.*}}@__msan_param_tls |
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| 59 | // CHECK: call void @__sanitizer_dtor_callback |
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| 60 | // CHECK-NOT: call void @__sanitizer_dtor_callback |
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| 61 | // CHECK: ret void |
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| 62 | |
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| 63 | // CHECK-LABEL: define {{.*}}InlinedD2Ev |
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| 64 | // CHECK-NOT: store i{{[0-9]+}} 0, {{.*}}@__msan_param_tls |
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| 65 | // CHECK: call void @__sanitizer_dtor_callback |
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| 66 | // CHECK-NOT: call void @__sanitizer_dtor_callback |
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| 67 | // CHECK: ret void |
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| 68 | |
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| 69 | // CHECK-LABEL: define {{.*}}Defaulted_Non_TrivialD2Ev |
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| 70 | // CHECK-NOT: store i{{[0-9]+}} 0, {{.*}}@__msan_param_tls |
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| 71 | // CHECK: call void @__sanitizer_dtor_callback |
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| 72 | // CHECK-NOT: call void @__sanitizer_dtor_callback |
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| 73 | // CHECK: ret void |
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| 74 | |
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