forked from OSchip/llvm-project
65 lines
2.6 KiB
C++
65 lines
2.6 KiB
C++
// RUN: %clangxx_cfi_dso_diag -std=c++11 %s -o %t
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// RUN: %t zero 2>&1 | FileCheck --check-prefix=CHECK-ZERO %s
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// RUN: %t unaddressable 2>&1 | FileCheck --check-prefix=CHECK-UNADDR %s
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// RUN: %t 2>&1 | FileCheck --check-prefix=CHECK-TYPEINFO %s
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// RUN: %clangxx_cfi_diag -std=c++11 %s -o %t2
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// RUN: %t2 zero 2>&1 | FileCheck --check-prefix=CHECK-ZERO %s
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// RUN: %t2 unaddressable 2>&1 | FileCheck --check-prefix=CHECK-UNADDR %s
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// RUN: %t2 2>&1 | FileCheck --check-prefix=CHECK-TYPEINFO %s
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// REQUIRES: cxxabi
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/mman.h>
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struct A {
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virtual void f();
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};
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void A::f() {}
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int main(int argc, char *argv[]) {
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char *volatile p = reinterpret_cast<char *>(new A());
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if (argc > 1 && strcmp(argv[1], "unaddressable") == 0) {
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void *vtable = mmap(nullptr, 4096, PROT_NONE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
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// Create an object with a vtable in an unaddressable memory region.
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*(uintptr_t *)p = (uintptr_t)vtable + 64;
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// CHECK-UNADDR: runtime error: control flow integrity check for type 'A' failed during cast
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// CHECK-UNADDR: note: invalid vtable
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// CHECK-UNADDR: <memory cannot be printed>
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// CHECK-UNADDR: runtime error: control flow integrity check for type 'A' failed during cast
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// CHECK-UNADDR: note: invalid vtable
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// CHECK-UNADDR: <memory cannot be printed>
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} else if (argc > 1 && strcmp(argv[1], "zero") == 0) {
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// Create an object with a vtable outside of any known DSO, but still in an
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// addressable area.
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void *vtable = calloc(1, 128);
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*(uintptr_t *)p = (uintptr_t)vtable + 64;
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// CHECK-ZERO: runtime error: control flow integrity check for type 'A' failed during cast
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// CHECK-ZERO: note: invalid vtable
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// CHECK-ZERO: 00 00 00 00 00 00 00 00
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// CHECK-ZERO: runtime error: control flow integrity check for type 'A' failed during cast
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// CHECK-ZERO: note: invalid vtable
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// CHECK-ZERO: 00 00 00 00 00 00 00 00
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} else {
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// Create an object with a seemingly fine vtable, but with an unaddressable
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// typeinfo pointer.
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void *vtable = calloc(1, 128);
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memset(vtable, 0xFE, 128);
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*(uintptr_t *)p = (uintptr_t)vtable + 64;
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// CHECK-TYPEINFO: runtime error: control flow integrity check for type 'A' failed during cast
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// CHECK-TYPEINFO: note: invalid vtable
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// CHECK-TYPEINFO: fe fe fe fe fe fe fe fe
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// CHECK-TYPEINFO: runtime error: control flow integrity check for type 'A' failed during cast
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// CHECK-TYPEINFO: note: invalid vtable
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// CHECK-TYPEINFO: fe fe fe fe fe fe fe fe
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}
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A *volatile pa = reinterpret_cast<A *>(p);
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pa = reinterpret_cast<A *>(p);
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}
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