[PATCH] D67985: CFI: wrong type passed to llvm.type.test with multiple inheritance devirtualization
This revision was automatically updated to reflect the committed changes. Closed by commit rG034badb312be: CFI: wrong type passed to llvm.type.test with multiple inheritance… (authored by dmikulin). Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D67985/new/ https://reviews.llvm.org/D67985 Files: clang/lib/CodeGen/CGExprCXX.cpp clang/test/CodeGenCXX/cfi-multiple-inheritance.cpp compiler-rt/test/cfi/multiple-inheritance2.cpp Index: compiler-rt/test/cfi/multiple-inheritance2.cpp === --- /dev/null +++ compiler-rt/test/cfi/multiple-inheritance2.cpp @@ -0,0 +1,38 @@ +// Test that virtual functions of the derived class can be called through +// pointers of both base classes without CFI errors. +// Related to Bugzilla 43390. + +// RUN: %clangxx_cfi -o %t1 %s +// RUN: %run %t1 2>&1 | FileCheck --check-prefix=CFI %s + +// CFI: In f1 +// CFI: In f2 +// CFI-NOT: control flow integrity check + +// REQUIRES: cxxabi + +#include + +class A1 { +public: +virtual void f1() = 0; +}; + +class A2 { +public: +virtual void f2() = 0; +}; + + +class B : public A1, public A2 { +public: +void f2() final { fprintf(stderr, "In f2\n"); } +void f1() final { fprintf(stderr, "In f1\n"); } +}; + +int main() { +B b; + +static_cast()->f1(); +static_cast()->f2(); +} Index: clang/test/CodeGenCXX/cfi-multiple-inheritance.cpp === --- /dev/null +++ clang/test/CodeGenCXX/cfi-multiple-inheritance.cpp @@ -0,0 +1,31 @@ +// Test that correct vtable ptr and type metadata are passed to llvm.type.test +// Related to Bugzilla 43390. + +// RUN: %clang_cc1 -triple x86_64-unknown-linux -fvisibility hidden -std=c++11 -fsanitize=cfi-nvcall -emit-llvm -o - %s | FileCheck %s + +class A1 { +public: +virtual int f1() = 0; +}; + +class A2 { +public: +virtual int f2() = 0; +}; + + +class B : public A1, public A2 { +public: +int f2() final { return 1; } +int f1() final { return 2; } +}; + +// CHECK-LABEL: define hidden i32 @_Z3foov +int foo() { +B b; +return static_cast()->f2(); +// CHECK: [[P:%[^ ]*]] = bitcast %class.B* %b to i8** +// CHECK: [[V:%[^ ]*]] = load i8*, i8** [[P]], align 8 +// CHECK: call i1 @llvm.type.test(i8* [[V]], metadata !"_ZTS1B") +// CHECK: call i1 @llvm.type.test(i8* [[V]], metadata !"all-vtables") +} Index: clang/lib/CodeGen/CGExprCXX.cpp === --- clang/lib/CodeGen/CGExprCXX.cpp +++ clang/lib/CodeGen/CGExprCXX.cpp @@ -382,7 +382,7 @@ const CXXRecordDecl *RD; std::tie(VTable, RD) = CGM.getCXXABI().LoadVTablePtr(*this, This.getAddress(), -MD->getParent()); +CalleeDecl->getParent()); EmitVTablePtrCheckForCall(RD, VTable, CFITCK_NVCall, CE->getBeginLoc()); } Index: compiler-rt/test/cfi/multiple-inheritance2.cpp === --- /dev/null +++ compiler-rt/test/cfi/multiple-inheritance2.cpp @@ -0,0 +1,38 @@ +// Test that virtual functions of the derived class can be called through +// pointers of both base classes without CFI errors. +// Related to Bugzilla 43390. + +// RUN: %clangxx_cfi -o %t1 %s +// RUN: %run %t1 2>&1 | FileCheck --check-prefix=CFI %s + +// CFI: In f1 +// CFI: In f2 +// CFI-NOT: control flow integrity check + +// REQUIRES: cxxabi + +#include + +class A1 { +public: +virtual void f1() = 0; +}; + +class A2 { +public: +virtual void f2() = 0; +}; + + +class B : public A1, public A2 { +public: +void f2() final { fprintf(stderr, "In f2\n"); } +void f1() final { fprintf(stderr, "In f1\n"); } +}; + +int main() { +B b; + +static_cast()->f1(); +static_cast()->f2(); +} Index: clang/test/CodeGenCXX/cfi-multiple-inheritance.cpp === --- /dev/null +++ clang/test/CodeGenCXX/cfi-multiple-inheritance.cpp @@ -0,0 +1,31 @@ +// Test that correct vtable ptr and type metadata are passed to llvm.type.test +// Related to Bugzilla 43390. + +// RUN: %clang_cc1 -triple x86_64-unknown-linux -fvisibility hidden -std=c++11 -fsanitize=cfi-nvcall -emit-llvm -o - %s | FileCheck %s + +class A1 { +public: +virtual int f1() = 0; +}; + +class A2 { +public: +virtual int f2() = 0; +}; + + +class B : public A1, public A2 { +public: +int f2() final { return 1; } +int f1() final { return 2; } +}; + +// CHECK-LABEL: define hidden i32 @_Z3foov +int foo() { +B b; +return static_cast()->f2(); +// CHECK: [[P:%[^ ]*]] = bitcast %class.B* %b to i8** +// CHECK: [[V:%[^ ]*]] = load i8*, i8** [[P]], align 8 +// CHECK: call i1 @llvm.type.test(i8* [[V]], metadata !"_ZTS1B") +// CHECK: call i1 @llvm.type.test(i8* [[V]], metadata !"all-vtables") +} Index:
[PATCH] D67985: CFI: wrong type passed to llvm.type.test with multiple inheritance devirtualization
pcc accepted this revision. pcc added a comment. This revision is now accepted and ready to land. LGTM CHANGES SINCE LAST ACTION https://reviews.llvm.org/D67985/new/ https://reviews.llvm.org/D67985 ___ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
[PATCH] D67985: CFI: wrong type passed to llvm.type.test with multiple inheritance devirtualization
dmikulin added a comment. @pcc : poke CHANGES SINCE LAST ACTION https://reviews.llvm.org/D67985/new/ https://reviews.llvm.org/D67985 ___ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
[PATCH] D67985: CFI: wrong type passed to llvm.type.test with multiple inheritance devirtualization
dmikulin updated this revision to Diff 223634. dmikulin added a comment. Added a new CodeGetCXX test case CHANGES SINCE LAST ACTION https://reviews.llvm.org/D67985/new/ https://reviews.llvm.org/D67985 Files: clang/lib/CodeGen/CGExprCXX.cpp clang/test/CodeGenCXX/cfi-multiple-inheritance.cpp compiler-rt/test/cfi/multiple-inheritance2.cpp Index: compiler-rt/test/cfi/multiple-inheritance2.cpp === --- /dev/null +++ compiler-rt/test/cfi/multiple-inheritance2.cpp @@ -0,0 +1,38 @@ +// Test that virtual functions of the derived class can be called through +// pointers of both base classes without CFI errors. +// Related to Bugzilla 43390. + +// RUN: %clangxx_cfi -o %t1 %s +// RUN: %run %t1 2>&1 | FileCheck --check-prefix=CFI %s + +// CFI: In f1 +// CFI: In f2 +// CFI-NOT: control flow integrity check + +// REQUIRES: cxxabi + +#include + +class A1 { +public: +virtual void f1() = 0; +}; + +class A2 { +public: +virtual void f2() = 0; +}; + + +class B : public A1, public A2 { +public: +void f2() final { fprintf(stderr, "In f2\n"); } +void f1() final { fprintf(stderr, "In f1\n"); } +}; + +int main() { +B b; + +static_cast()->f1(); +static_cast()->f2(); +} Index: clang/test/CodeGenCXX/cfi-multiple-inheritance.cpp === --- /dev/null +++ clang/test/CodeGenCXX/cfi-multiple-inheritance.cpp @@ -0,0 +1,31 @@ +// Test that correct vtable ptr and type metadata are passed to llvm.type.test +// Related to Bugzilla 43390. + +// RUN: %clang_cc1 -triple x86_64-unknown-linux -fvisibility hidden -std=c++11 -fsanitize=cfi-nvcall -emit-llvm -o - %s | FileCheck %s + +class A1 { +public: +virtual int f1() = 0; +}; + +class A2 { +public: +virtual int f2() = 0; +}; + + +class B : public A1, public A2 { +public: +int f2() final { return 1; } +int f1() final { return 2; } +}; + +// CHECK-LABEL: define hidden i32 @_Z3foov +int foo() { +B b; +return static_cast()->f2(); +// CHECK: [[P:%[^ ]*]] = bitcast %class.B* %b to i8** +// CHECK: [[V:%[^ ]*]] = load i8*, i8** [[P]], align 8 +// CHECK: call i1 @llvm.type.test(i8* [[V]], metadata !"_ZTS1B") +// CHECK: call i1 @llvm.type.test(i8* [[V]], metadata !"all-vtables") +} Index: clang/lib/CodeGen/CGExprCXX.cpp === --- clang/lib/CodeGen/CGExprCXX.cpp +++ clang/lib/CodeGen/CGExprCXX.cpp @@ -382,7 +382,7 @@ const CXXRecordDecl *RD; std::tie(VTable, RD) = CGM.getCXXABI().LoadVTablePtr(*this, This.getAddress(), -MD->getParent()); +CalleeDecl->getParent()); EmitVTablePtrCheckForCall(RD, VTable, CFITCK_NVCall, CE->getBeginLoc()); } Index: compiler-rt/test/cfi/multiple-inheritance2.cpp === --- /dev/null +++ compiler-rt/test/cfi/multiple-inheritance2.cpp @@ -0,0 +1,38 @@ +// Test that virtual functions of the derived class can be called through +// pointers of both base classes without CFI errors. +// Related to Bugzilla 43390. + +// RUN: %clangxx_cfi -o %t1 %s +// RUN: %run %t1 2>&1 | FileCheck --check-prefix=CFI %s + +// CFI: In f1 +// CFI: In f2 +// CFI-NOT: control flow integrity check + +// REQUIRES: cxxabi + +#include + +class A1 { +public: +virtual void f1() = 0; +}; + +class A2 { +public: +virtual void f2() = 0; +}; + + +class B : public A1, public A2 { +public: +void f2() final { fprintf(stderr, "In f2\n"); } +void f1() final { fprintf(stderr, "In f1\n"); } +}; + +int main() { +B b; + +static_cast()->f1(); +static_cast()->f2(); +} Index: clang/test/CodeGenCXX/cfi-multiple-inheritance.cpp === --- /dev/null +++ clang/test/CodeGenCXX/cfi-multiple-inheritance.cpp @@ -0,0 +1,31 @@ +// Test that correct vtable ptr and type metadata are passed to llvm.type.test +// Related to Bugzilla 43390. + +// RUN: %clang_cc1 -triple x86_64-unknown-linux -fvisibility hidden -std=c++11 -fsanitize=cfi-nvcall -emit-llvm -o - %s | FileCheck %s + +class A1 { +public: +virtual int f1() = 0; +}; + +class A2 { +public: +virtual int f2() = 0; +}; + + +class B : public A1, public A2 { +public: +int f2() final { return 1; } +int f1() final { return 2; } +}; + +// CHECK-LABEL: define hidden i32 @_Z3foov +int foo() { +B b; +return static_cast()->f2(); +// CHECK: [[P:%[^ ]*]] = bitcast %class.B* %b to i8** +// CHECK: [[V:%[^ ]*]] = load i8*, i8** [[P]], align 8 +// CHECK: call i1 @llvm.type.test(i8* [[V]], metadata !"_ZTS1B") +// CHECK: call i1 @llvm.type.test(i8* [[V]], metadata !"all-vtables") +} Index: clang/lib/CodeGen/CGExprCXX.cpp === --- clang/lib/CodeGen/CGExprCXX.cpp +++
[PATCH] D67985: CFI: wrong type passed to llvm.type.test with multiple inheritance devirtualization
pcc added a comment. Can you add a CodeGenCXX test as well, please? Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D67985/new/ https://reviews.llvm.org/D67985 ___ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
[PATCH] D67985: CFI: wrong type passed to llvm.type.test with multiple inheritance devirtualization
filcab added subscribers: pcc, filcab. filcab added a comment. It seems there's a FIXME anticipating this problem. @pcc: Can you double-check, please? Thank you, Filipe Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D67985/new/ https://reviews.llvm.org/D67985 ___ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
[PATCH] D67985: CFI: wrong type passed to llvm.type.test with multiple inheritance devirtualization
dmikulin created this revision. Herald added subscribers: llvm-commits, Sanitizers, cfe-commits, Prazek. Herald added projects: clang, Sanitizers, LLVM. Fix for https://bugs.llvm.org/show_bug.cgi?id=43390 Repository: rG LLVM Github Monorepo https://reviews.llvm.org/D67985 Files: clang/lib/CodeGen/CGExprCXX.cpp compiler-rt/test/cfi/multiple-inheritance2.cpp Index: compiler-rt/test/cfi/multiple-inheritance2.cpp === --- /dev/null +++ compiler-rt/test/cfi/multiple-inheritance2.cpp @@ -0,0 +1,38 @@ +// Test that virtual functions of the derived class can be called through +// pointers of both base classes without CFI errors. +// Related to Bugzilla 43390. + +// RUN: %clangxx_cfi -o %t1 %s +// RUN: %run %t1 2>&1 | FileCheck --check-prefix=CFI %s + +// CFI: In f1 +// CFI: In f2 +// CFI-NOT: control flow integrity check + +// REQUIRES: cxxabi + +#include + +class A1 { +public: +virtual void f1() = 0; +}; + +class A2 { +public: +virtual void f2() = 0; +}; + + +class B : public A1, public A2 { +public: +void f2() final { fprintf(stderr, "In f2\n"); } +void f1() final { fprintf(stderr, "In f1\n"); } +}; + +int main() { +B b; + +static_cast()->f1(); +static_cast()->f2(); +} Index: clang/lib/CodeGen/CGExprCXX.cpp === --- clang/lib/CodeGen/CGExprCXX.cpp +++ clang/lib/CodeGen/CGExprCXX.cpp @@ -382,7 +382,7 @@ const CXXRecordDecl *RD; std::tie(VTable, RD) = CGM.getCXXABI().LoadVTablePtr(*this, This.getAddress(), -MD->getParent()); +CalleeDecl->getParent()); EmitVTablePtrCheckForCall(RD, VTable, CFITCK_NVCall, CE->getBeginLoc()); } Index: compiler-rt/test/cfi/multiple-inheritance2.cpp === --- /dev/null +++ compiler-rt/test/cfi/multiple-inheritance2.cpp @@ -0,0 +1,38 @@ +// Test that virtual functions of the derived class can be called through +// pointers of both base classes without CFI errors. +// Related to Bugzilla 43390. + +// RUN: %clangxx_cfi -o %t1 %s +// RUN: %run %t1 2>&1 | FileCheck --check-prefix=CFI %s + +// CFI: In f1 +// CFI: In f2 +// CFI-NOT: control flow integrity check + +// REQUIRES: cxxabi + +#include + +class A1 { +public: +virtual void f1() = 0; +}; + +class A2 { +public: +virtual void f2() = 0; +}; + + +class B : public A1, public A2 { +public: +void f2() final { fprintf(stderr, "In f2\n"); } +void f1() final { fprintf(stderr, "In f1\n"); } +}; + +int main() { +B b; + +static_cast()->f1(); +static_cast()->f2(); +} Index: clang/lib/CodeGen/CGExprCXX.cpp === --- clang/lib/CodeGen/CGExprCXX.cpp +++ clang/lib/CodeGen/CGExprCXX.cpp @@ -382,7 +382,7 @@ const CXXRecordDecl *RD; std::tie(VTable, RD) = CGM.getCXXABI().LoadVTablePtr(*this, This.getAddress(), -MD->getParent()); +CalleeDecl->getParent()); EmitVTablePtrCheckForCall(RD, VTable, CFITCK_NVCall, CE->getBeginLoc()); } ___ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits