f31ea30694
Avoid crashing when printing diagnostics for vtable-related CFI errors. In diagnostic mode, the frontend does an additional check of the vtable pointer against the set of all known vtable addresses and lets the runtime handler know if it is safe to inspect the vtable. http://reviews.llvm.org/D16823 llvm-svn: 259716
135 lines
4.6 KiB
C++
135 lines
4.6 KiB
C++
// RUN: %clang_cc1 -triple x86_64-unknown-linux -std=c++11 -fsanitize=cfi-derived-cast -fsanitize-trap=cfi-derived-cast -emit-llvm -o - %s | FileCheck -check-prefix=CHECK-DCAST %s
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// RUN: %clang_cc1 -triple x86_64-unknown-linux -std=c++11 -fsanitize=cfi-unrelated-cast -fsanitize-trap=cfi-unrelated-cast -emit-llvm -o - %s | FileCheck -check-prefix=CHECK-UCAST %s
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// RUN: %clang_cc1 -triple x86_64-unknown-linux -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
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// In this test the main thing we are searching for is something like
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// 'metadata !"1B"' where "1B" is the mangled name of the class we are
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// casting to (or maybe its base class in non-strict mode).
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struct A {
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virtual void f();
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int i() const;
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};
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struct B : A {
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virtual void f();
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};
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struct C : A {};
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// CHECK-DCAST-LABEL: define void @_Z3abpP1A
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void abp(A *a) {
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// CHECK-DCAST: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
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// CHECK-DCAST-NEXT: br i1 [[P]], label %[[CONTBB:[^ ]*]], label %[[TRAPBB:[^ ,]*]]
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// CHECK-DCAST: [[TRAPBB]]
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// CHECK-DCAST-NEXT: call void @llvm.trap()
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// CHECK-DCAST-NEXT: unreachable
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// CHECK-DCAST: [[CONTBB]]
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// CHECK-DCAST: ret
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(void)static_cast<B*>(a);
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}
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// CHECK-DCAST-LABEL: define void @_Z3abrR1A
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void abr(A &a) {
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// CHECK-DCAST: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
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// CHECK-DCAST-NEXT: br i1 [[P]], label %[[CONTBB:[^ ]*]], label %[[TRAPBB:[^ ,]*]]
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// CHECK-DCAST: [[TRAPBB]]
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// CHECK-DCAST-NEXT: call void @llvm.trap()
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// CHECK-DCAST-NEXT: unreachable
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// CHECK-DCAST: [[CONTBB]]
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// CHECK-DCAST: ret
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(void)static_cast<B&>(a);
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}
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// CHECK-DCAST-LABEL: define void @_Z4abrrO1A
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void abrr(A &&a) {
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// CHECK-DCAST: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
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// CHECK-DCAST-NEXT: br i1 [[P]], label %[[CONTBB:[^ ]*]], label %[[TRAPBB:[^ ,]*]]
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// CHECK-DCAST: [[TRAPBB]]
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// CHECK-DCAST-NEXT: call void @llvm.trap()
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// CHECK-DCAST-NEXT: unreachable
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// CHECK-DCAST: [[CONTBB]]
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// CHECK-DCAST: ret
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(void)static_cast<B&&>(a);
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}
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// CHECK-UCAST-LABEL: define void @_Z3vbpPv
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void vbp(void *p) {
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// CHECK-UCAST: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
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// CHECK-UCAST-NEXT: br i1 [[P]], label %[[CONTBB:[^ ]*]], label %[[TRAPBB:[^ ,]*]]
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// CHECK-UCAST: [[TRAPBB]]
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// CHECK-UCAST-NEXT: call void @llvm.trap()
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// CHECK-UCAST-NEXT: unreachable
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// CHECK-UCAST: [[CONTBB]]
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// CHECK-UCAST: ret
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(void)static_cast<B*>(p);
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}
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// CHECK-UCAST-LABEL: define void @_Z3vbrRc
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void vbr(char &r) {
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// CHECK-UCAST: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
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// CHECK-UCAST-NEXT: br i1 [[P]], label %[[CONTBB:[^ ]*]], label %[[TRAPBB:[^ ,]*]]
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// CHECK-UCAST: [[TRAPBB]]
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// CHECK-UCAST-NEXT: call void @llvm.trap()
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// CHECK-UCAST-NEXT: unreachable
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// CHECK-UCAST: [[CONTBB]]
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// CHECK-UCAST: ret
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(void)reinterpret_cast<B&>(r);
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}
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// CHECK-UCAST-LABEL: define void @_Z4vbrrOc
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void vbrr(char &&r) {
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// CHECK-UCAST: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
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// CHECK-UCAST-NEXT: br i1 [[P]], label %[[CONTBB:[^ ]*]], label %[[TRAPBB:[^ ,]*]]
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// CHECK-UCAST: [[TRAPBB]]
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// CHECK-UCAST-NEXT: call void @llvm.trap()
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// CHECK-UCAST-NEXT: unreachable
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// CHECK-UCAST: [[CONTBB]]
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// CHECK-UCAST: ret
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(void)reinterpret_cast<B&&>(r);
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}
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// CHECK-UCAST-LABEL: define void @_Z3vcpPv
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// CHECK-UCAST-STRICT-LABEL: define void @_Z3vcpPv
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void vcp(void *p) {
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// CHECK-UCAST: call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1A")
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// CHECK-UCAST-STRICT: call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1C")
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(void)static_cast<C*>(p);
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}
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// CHECK-UCAST-LABEL: define void @_Z3bcpP1B
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// CHECK-UCAST-STRICT-LABEL: define void @_Z3bcpP1B
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void bcp(B *p) {
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// CHECK-UCAST: call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1A")
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// CHECK-UCAST-STRICT: call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1C")
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(void)(C *)p;
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}
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// CHECK-UCAST-LABEL: define void @_Z8bcp_callP1B
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// CHECK-UCAST-STRICT-LABEL: define void @_Z8bcp_callP1B
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void bcp_call(B *p) {
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// CHECK-UCAST: call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1A")
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// CHECK-UCAST-STRICT: call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1C")
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((C *)p)->f();
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}
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// CHECK-UCAST-LABEL: define i32 @_Z6a_callP1A
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// CHECK-UCAST-STRICT-LABEL: define i32 @_Z6a_callP1A
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int a_call(A *a) {
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// CHECK-UCAST-NOT: @llvm.bitset.test
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// CHECK-UCAST-STRICT-NOT: @llvm.bitset.test
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return a->i();
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}
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