[compiler-rt] r374909 - CFI: wrong type passed to llvm.type.test with multiple inheritance devirtualization.

[Dmitry Mikulin via llvm-commits]

Author: dmikulin
Date: Tue Oct 15 09:32:50 2019
New Revision: 374909

URL: http://llvm.org/viewvc/llvm-project?rev=374909&view=rev
Log:
CFI: wrong type passed to llvm.type.test with multiple inheritance devirtualization.

Differential Revision: https://reviews.llvm.org/D67985

Added:
    compiler-rt/trunk/test/cfi/multiple-inheritance2.cpp

Added: compiler-rt/trunk/test/cfi/multiple-inheritance2.cpp
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/test/cfi/multiple-inheritance2.cpp?rev=374909&view=auto
==============================================================================
--- compiler-rt/trunk/test/cfi/multiple-inheritance2.cpp (added)
+++ compiler-rt/trunk/test/cfi/multiple-inheritance2.cpp Tue Oct 15 09:32:50 2019
@@ -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 <stdio.h>
+
+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<A1*>(&b)->f1();
+    static_cast<A2*>(&b)->f2();
+}