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llvm-project/clang/test/CodeGenCXX/sanitize-dtor-vtable.cpp

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Make '-disable-llvm-optzns' an alias for '-disable-llvm-passes'. Much to my surprise, '-disable-llvm-optzns' which I thought was the magical flag I wanted to get at the raw LLVM IR coming out of Clang deosn't do that. It still runs some passes over the IR. I don't want that, I really want the *raw* IR coming out of Clang and I strongly suspect everyone else using it is in the same camp. There is actually a flag that does what I want that I didn't know about called '-disable-llvm-passes'. I suspect many others don't know about it either. It both does what I want and is much simpler. This removes the confusing version and makes that spelling of the flag an alias for '-disable-llvm-passes'. I've also moved everything in Clang to use the 'passes' spelling as it seems both more accurate (*all* LLVM passes are disabled, not just optimizations) and much easier to remember and spell correctly. This is part of simplifying how Clang drives LLVM to make it cleaner to wire up to the new pass manager. Differential Revision: https://reviews.llvm.org/D28047 llvm-svn: 290392
2016-12-23 08:23:01 +08:00
// RUN: %clang_cc1 -O0 -fsanitize=memory -fsanitize-memory-use-after-dtor -disable-llvm-passes -std=c++11 -triple=x86_64-pc-linux -emit-llvm -o - %s | FileCheck %s
// RUN: %clang_cc1 -O1 -fsanitize=memory -fsanitize-memory-use-after-dtor -disable-llvm-passes -std=c++11 -triple=x86_64-pc-linux -emit-llvm -o - %s | FileCheck %s
Implementation and testing for poisoning vtable ptr in dtor. Summary: After destruction, invocation of virtual functions prevented by poisoning vtable pointer. Reviewers: eugenis, kcc Subscribers: cfe-commits Differential Revision: http://reviews.llvm.org/D12712 Fixed testing callback emission order to account for vptr. Poison vtable in either complete or base dtor, depending on if virtual bases exist. If virtual bases exist, poison in complete dtor. Otherwise, poison in base. Remove commented-out block. llvm-svn: 247762
2015-09-16 08:38:22 +08:00
class A {
public:
int x;
A() {}
virtual ~A() {}
};
A a;
class B : virtual public A {
public:
int y;
B() {}
~B() {}
};
B b;
// CHECK-LABEL: define {{.*}}AD1Ev
// CHECK-NOT: call void @__sanitizer_dtor_callback
// CHECK: call void {{.*}}AD2Ev
// CHECK-NOT: call void @__sanitizer_dtor_callback
// CHECK: ret void
// After invoking base dtor and dtor for virtual base, poison vtable ptr.
// CHECK-LABEL: define {{.*}}BD1Ev
// CHECK-NOT: call void @__sanitizer_dtor_callback
// CHECK: call void {{.*}}BD2Ev
// CHECK-NOT: call void @__sanitizer_dtor_callback
// CHECK: call void {{.*}}AD2Ev
// CHECK: call void @__sanitizer_dtor_callback{{.*}}i64 8
// CHECK-NOT: call void @__sanitizer_dtor_callback
// CHECK: ret void
// Since no virtual bases, poison vtable ptr here.
// CHECK-LABEL: define {{.*}}AD2Ev
// CHECK: call void @__sanitizer_dtor_callback
// CHECK: call void @__sanitizer_dtor_callback{{.*}}i64 8
// CHECK-NOT: call void @__sanitizer_dtor_callback
// CHECK: ret void
// Poison members
// CHECK-LABEL: define {{.*}}BD2Ev
// CHECK: call void @__sanitizer_dtor_callback
// CHECK-NOT: call void @__sanitizer_dtor_callback
// CHECK: ret void