c5978f42ec
Sometimes people get minimal crash reports after a UBSAN incident. This change tags each trap with an integer representing the kind of failure encountered, which can aid in tracking down the root cause of the problem.
135 lines
4.8 KiB
C++
135 lines
4.8 KiB
C++
// RUN: %clang_cc1 -triple x86_64-unknown-linux -fvisibility hidden -std=c++11 -fsanitize=cfi-derived-cast -fsanitize-trap=cfi-derived-cast -emit-llvm -o - %s | FileCheck -check-prefix=CHECK-DCAST %s
|
|
// RUN: %clang_cc1 -triple x86_64-unknown-linux -fvisibility hidden -std=c++11 -fsanitize=cfi-unrelated-cast -fsanitize-trap=cfi-unrelated-cast -emit-llvm -o - %s | FileCheck -check-prefix=CHECK-UCAST %s
|
|
// RUN: %clang_cc1 -triple x86_64-unknown-linux -fvisibility hidden -std=c++11 -fsanitize=cfi-unrelated-cast,cfi-cast-strict -fsanitize-trap=cfi-unrelated-cast,cfi-cast-strict -emit-llvm -o - %s | FileCheck -check-prefix=CHECK-UCAST-STRICT %s
|
|
|
|
// In this test the main thing we are searching for is something like
|
|
// 'metadata !"1B"' where "1B" is the mangled name of the class we are
|
|
// casting to (or maybe its base class in non-strict mode).
|
|
|
|
struct A {
|
|
virtual void f();
|
|
int i() const;
|
|
};
|
|
|
|
struct B : A {
|
|
virtual void f();
|
|
};
|
|
|
|
struct C : A {};
|
|
|
|
// CHECK-DCAST-LABEL: define hidden void @_Z3abpP1A
|
|
void abp(A *a) {
|
|
// CHECK-DCAST: [[P:%[^ ]*]] = call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
|
|
// CHECK-DCAST-NEXT: br i1 [[P]], label %[[CONTBB:[^ ]*]], label %[[TRAPBB:[^ ,]*]]
|
|
|
|
// CHECK-DCAST: [[TRAPBB]]
|
|
// CHECK-DCAST-NEXT: call void @llvm.ubsantrap(i8 2)
|
|
// CHECK-DCAST-NEXT: unreachable
|
|
|
|
// CHECK-DCAST: [[CONTBB]]
|
|
// CHECK-DCAST: ret
|
|
(void)static_cast<B*>(a);
|
|
}
|
|
|
|
// CHECK-DCAST-LABEL: define hidden void @_Z3abrR1A
|
|
void abr(A &a) {
|
|
// CHECK-DCAST: [[P:%[^ ]*]] = call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
|
|
// CHECK-DCAST-NEXT: br i1 [[P]], label %[[CONTBB:[^ ]*]], label %[[TRAPBB:[^ ,]*]]
|
|
|
|
// CHECK-DCAST: [[TRAPBB]]
|
|
// CHECK-DCAST-NEXT: call void @llvm.ubsantrap(i8 2)
|
|
// CHECK-DCAST-NEXT: unreachable
|
|
|
|
// CHECK-DCAST: [[CONTBB]]
|
|
// CHECK-DCAST: ret
|
|
(void)static_cast<B&>(a);
|
|
}
|
|
|
|
// CHECK-DCAST-LABEL: define hidden void @_Z4abrrO1A
|
|
void abrr(A &&a) {
|
|
// CHECK-DCAST: [[P:%[^ ]*]] = call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
|
|
// CHECK-DCAST-NEXT: br i1 [[P]], label %[[CONTBB:[^ ]*]], label %[[TRAPBB:[^ ,]*]]
|
|
|
|
// CHECK-DCAST: [[TRAPBB]]
|
|
// CHECK-DCAST-NEXT: call void @llvm.ubsantrap(i8 2)
|
|
// CHECK-DCAST-NEXT: unreachable
|
|
|
|
// CHECK-DCAST: [[CONTBB]]
|
|
// CHECK-DCAST: ret
|
|
(void)static_cast<B&&>(a);
|
|
}
|
|
|
|
// CHECK-UCAST-LABEL: define hidden void @_Z3vbpPv
|
|
void vbp(void *p) {
|
|
// CHECK-UCAST: [[P:%[^ ]*]] = call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
|
|
// CHECK-UCAST-NEXT: br i1 [[P]], label %[[CONTBB:[^ ]*]], label %[[TRAPBB:[^ ,]*]]
|
|
|
|
// CHECK-UCAST: [[TRAPBB]]
|
|
// CHECK-UCAST-NEXT: call void @llvm.ubsantrap(i8 2)
|
|
// CHECK-UCAST-NEXT: unreachable
|
|
|
|
// CHECK-UCAST: [[CONTBB]]
|
|
// CHECK-UCAST: ret
|
|
(void)static_cast<B*>(p);
|
|
}
|
|
|
|
// CHECK-UCAST-LABEL: define hidden void @_Z3vbrRc
|
|
void vbr(char &r) {
|
|
// CHECK-UCAST: [[P:%[^ ]*]] = call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
|
|
// CHECK-UCAST-NEXT: br i1 [[P]], label %[[CONTBB:[^ ]*]], label %[[TRAPBB:[^ ,]*]]
|
|
|
|
// CHECK-UCAST: [[TRAPBB]]
|
|
// CHECK-UCAST-NEXT: call void @llvm.ubsantrap(i8 2)
|
|
// CHECK-UCAST-NEXT: unreachable
|
|
|
|
// CHECK-UCAST: [[CONTBB]]
|
|
// CHECK-UCAST: ret
|
|
(void)reinterpret_cast<B&>(r);
|
|
}
|
|
|
|
// CHECK-UCAST-LABEL: define hidden void @_Z4vbrrOc
|
|
void vbrr(char &&r) {
|
|
// CHECK-UCAST: [[P:%[^ ]*]] = call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
|
|
// CHECK-UCAST-NEXT: br i1 [[P]], label %[[CONTBB:[^ ]*]], label %[[TRAPBB:[^ ,]*]]
|
|
|
|
// CHECK-UCAST: [[TRAPBB]]
|
|
// CHECK-UCAST-NEXT: call void @llvm.ubsantrap(i8 2)
|
|
// CHECK-UCAST-NEXT: unreachable
|
|
|
|
// CHECK-UCAST: [[CONTBB]]
|
|
// CHECK-UCAST: ret
|
|
(void)reinterpret_cast<B&&>(r);
|
|
}
|
|
|
|
// CHECK-UCAST-LABEL: define hidden void @_Z3vcpPv
|
|
// CHECK-UCAST-STRICT-LABEL: define hidden void @_Z3vcpPv
|
|
void vcp(void *p) {
|
|
// CHECK-UCAST: call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"_ZTS1A")
|
|
// CHECK-UCAST-STRICT: call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"_ZTS1C")
|
|
(void)static_cast<C*>(p);
|
|
}
|
|
|
|
// CHECK-UCAST-LABEL: define hidden void @_Z3bcpP1B
|
|
// CHECK-UCAST-STRICT-LABEL: define hidden void @_Z3bcpP1B
|
|
void bcp(B *p) {
|
|
// CHECK-UCAST: call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"_ZTS1A")
|
|
// CHECK-UCAST-STRICT: call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"_ZTS1C")
|
|
(void)(C *)p;
|
|
}
|
|
|
|
// CHECK-UCAST-LABEL: define hidden void @_Z8bcp_callP1B
|
|
// CHECK-UCAST-STRICT-LABEL: define hidden void @_Z8bcp_callP1B
|
|
void bcp_call(B *p) {
|
|
// CHECK-UCAST: call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"_ZTS1A")
|
|
// CHECK-UCAST-STRICT: call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"_ZTS1C")
|
|
((C *)p)->f();
|
|
}
|
|
|
|
// CHECK-UCAST-LABEL: define hidden i32 @_Z6a_callP1A
|
|
// CHECK-UCAST-STRICT-LABEL: define hidden i32 @_Z6a_callP1A
|
|
int a_call(A *a) {
|
|
// CHECK-UCAST-NOT: @llvm.type.test
|
|
// CHECK-UCAST-STRICT-NOT: @llvm.type.test
|
|
return a->i();
|
|
}
|