cb96464f12
Poison trivial class members one-by-one in the reverse order of their
construction, instead of all-at-once at the very end.
For example, in the following code access to `x` from `~B` will
produce an undefined value.
struct A {
struct B b;
int x;
};
Reviewed By: kda
Differential Revision: https://reviews.llvm.org/D119600
83 lines
1.9 KiB
C++
83 lines
1.9 KiB
C++
// RUN: %clang_cc1 -fsanitize=memory -O0 -fsanitize-memory-use-after-dtor -std=c++11 -triple=x86_64-pc-linux -emit-llvm -o - %s | FileCheck %s
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// RUN: %clang_cc1 -fsanitize=memory -O1 -fno-experimental-new-pass-manager -fsanitize-memory-use-after-dtor -std=c++11 -triple=x86_64-pc-linux -emit-llvm -o - %s | FileCheck %s
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template <class T>
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class Vector {
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public:
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int size;
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~Vector() {
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size += 1;
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}
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};
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struct Base {
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int b1;
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double b2;
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Base() {
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b1 = 5;
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b2 = 10.989;
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}
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virtual ~Base() {}
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};
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struct VirtualBase {
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int vb1;
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int vb2;
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VirtualBase() {
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vb1 = 10;
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vb2 = 11;
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}
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virtual ~VirtualBase() {}
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};
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struct Derived : public Base, public virtual VirtualBase {
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int d1;
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Vector<int> v;
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int d2;
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Derived() {
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d1 = 10;
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}
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~Derived() {}
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};
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Derived d;
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// Destruction order:
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// Derived: int, Vector, Base, VirtualBase
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// CHECK-LABEL: define {{.*}}ZN7DerivedD1Ev
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// CHECK: call void {{.*}}ZN11VirtualBaseD2Ev
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// CHECK: ret void
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// CHECK-LABEL: define {{.*}}ZN7DerivedD0Ev
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// CHECK: ret void
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// CHECK-LABEL: define {{.*}}ZN11VirtualBaseD1Ev
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// CHECK: ret void
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// CHECK-LABEL: define {{.*}}ZN11VirtualBaseD0Ev
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// CHECK: ret void
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// poison 2 ints
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// CHECK-LABEL: define {{.*}}ZN11VirtualBaseD2Ev
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// CHECK: call void {{.*}}sanitizer_dtor_callback({{.*}}, i64 8)
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// CHECK: ret void
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// poison int and double
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// CHECK-LABEL: define {{.*}}ZN4BaseD2Ev
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// CHECK: call void {{.*}}sanitizer_dtor_callback({{.*}}, i64 16)
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// CHECK: ret void
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// poison int, ignore vector, poison int
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// CHECK-LABEL: define {{.*}}ZN7DerivedD2Ev
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// CHECK: call void {{.*}}sanitizer_dtor_callback({{.*}}, i64 4)
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// CHECK: call void {{.*}}ZN6VectorIiED1Ev
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// CHECK: call void {{.*}}sanitizer_dtor_callback({{.*}}, i64 4)
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// CHECK: call void {{.*}}ZN4BaseD2Ev
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// CHECK: ret void
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// poison int
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// CHECK-LABEL: define {{.*}}ZN6VectorIiED2Ev
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// CHECK: call void {{.*}}sanitizer_dtor_callback({{.*}}, i64 4)
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// CHECK: ret void
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