73583d5f2d
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/D16824 llvm-svn: 259717
45 lines
971 B
C++
45 lines
971 B
C++
// RUN: %clangxx -g -DSHARED_LIB %s -fPIC -shared -o %T/target_uninstrumented-so.so
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// RUN: %clangxx_cfi_diag -g %s -o %t %T/target_uninstrumented-so.so
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// RUN: %t 2>&1 | FileCheck %s
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// REQUIRES: cxxabi
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#include <stdio.h>
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#include <string.h>
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struct A {
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virtual void f();
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};
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void *create_B();
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#ifdef SHARED_LIB
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struct B {
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virtual void f();
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};
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void B::f() {}
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void *create_B() {
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return (void *)(new B());
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}
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#else
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void A::f() {}
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int main(int argc, char *argv[]) {
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void *p = create_B();
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// CHECK: runtime error: control flow integrity check for type 'A' failed during cast to unrelated type
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// CHECK: invalid vtable in module {{.*}}target_uninstrumented-so.so
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A *a = (A *)p;
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memset(p, 0, sizeof(A));
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// CHECK: runtime error: control flow integrity check for type 'A' failed during cast to unrelated type
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// CHECK-NOT: invalid vtable in module
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// CHECK: invalid vtable
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a = (A *)p;
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// CHECK: done
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fprintf(stderr, "done %p\n", a);
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}
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#endif
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