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| author | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2015-12-15 23:00:20 +0000 |
|---|---|---|
| committer | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2015-12-15 23:00:20 +0000 |
| commit | 3a8ad7e2f6acb0e823154d76a203b828d32e9aa7 (patch) | |
| tree | a776a11e6918adc4741b81ecd804378ef30a4e47 /test/CodeGenCXX/cfi-cross-dso.cpp | |
| parent | 86fda4a2ffb1b93ea97556a504cdd41063aaced2 (diff) | |
Cross-DSO control flow integrity (Clang part).
Clang-side cross-DSO CFI.
* Adds a command line flag -f[no-]sanitize-cfi-cross-dso.
* Links a runtime library when enabled.
* Emits __cfi_slowpath calls is bitset test fails.
* Emits extra hash-based bitsets for external CFI checks.
* Sets a module flag to enable __cfi_check generation during LTO.
This mode does not yet support diagnostics.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@255694 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGenCXX/cfi-cross-dso.cpp')
| -rw-r--r-- | test/CodeGenCXX/cfi-cross-dso.cpp | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/test/CodeGenCXX/cfi-cross-dso.cpp b/test/CodeGenCXX/cfi-cross-dso.cpp new file mode 100644 index 0000000000..e7e9f98ce5 --- /dev/null +++ b/test/CodeGenCXX/cfi-cross-dso.cpp @@ -0,0 +1,45 @@ +// RUN: %clang_cc1 -triple x86_64-unknown-linux -fsanitize=cfi-vcall -fsanitize-cfi-cross-dso -emit-llvm -o - %s | FileCheck --check-prefix=CHECK --check-prefix=ITANIUM %s +// RUN: %clang_cc1 -triple x86_64-pc-windows-msvc -fsanitize=cfi-vcall -fsanitize-cfi-cross-dso -emit-llvm -o - %s | FileCheck --check-prefix=CHECK --check-prefix=MS %s + +struct A { + A(); + virtual void f(); +}; + +A::A() {} +void A::f() {} + +void caller(A* a) { + a->f(); +} + +namespace { +struct B { + virtual void f(); +}; + +void B::f() {} +} // namespace + +void g() { + B b; + b.f(); +} + +// MS: @[[B_VTABLE:.*]] = private unnamed_addr constant [2 x i8*] {{.*}}@"\01??_R4B@?A@@6B@"{{.*}}@"\01?f@B@?A@@UEAAXXZ" + +// CHECK: %[[VT:.*]] = load void (%struct.A*)**, void (%struct.A*)*** +// CHECK: %[[VT2:.*]] = bitcast {{.*}}%[[VT]] to i8*, !nosanitize +// ITANIUM: %[[TEST:.*]] = call i1 @llvm.bitset.test(i8* %[[VT2]], metadata !"_ZTS1A"), !nosanitize +// MS: %[[TEST:.*]] = call i1 @llvm.bitset.test(i8* %[[VT2]], metadata !"?AUA@@"), !nosanitize +// CHECK: br i1 %[[TEST]], label %[[CONT:.*]], label %[[SLOW:.*]], {{.*}} !nosanitize +// CHECK: [[SLOW]]: +// ITANIUM: call void @__cfi_slowpath(i64 7004155349499253778, i8* %[[VT2]]) {{.*}} !nosanitize +// MS: call void @__cfi_slowpath(i64 -8005289897957287421, i8* %[[VT2]]) {{.*}} !nosanitize +// CHECK: br label %[[CONT]], !nosanitize +// CHECK: [[CONT]]: +// CHECK: call void %{{.*}}(%struct.A* %{{.*}}) + +// No hash-based bit set entry for (anonymous namespace)::B +// ITANIUM-NOT: !{i64 {{.*}}, [3 x i8*]* @_ZTVN12_GLOBAL__N_11BE, +// MS-NOT: !{i64 {{.*}}, [2 x i8*]* @[[B_VTABLE]], |