1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // Address Sanitizer doesn't instrument weak symbols on Linux. When a key 10 // function is defined for bad_function_call's vtable, its typeinfo and vtable 11 // will be defined as strong symbols in the library and weak symbols in other 12 // translation units. Only the strong symbol will be instrumented, increasing 13 // its size (due to the redzone) and leading to a serious ODR violation 14 // resulting in a crash. 15 // Some relevant bugs: 16 // https://github.com/google/sanitizers/issues/1017 17 // https://github.com/google/sanitizers/issues/619 18 // https://github.com/google/sanitizers/issues/398 19 // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68016 20 // UNSUPPORTED: c++03, asan 21 22 // <functional> 23 24 #include <functional> 25 26 #include "test_macros.h" 27 28 struct Incomplete; 29 template<class T> struct Holder { T t; }; 30 typedef Holder<Incomplete> *Ptr; 31 32 Ptr no_args() { return nullptr; } 33 Ptr one_arg(Ptr p) { return p; } 34 Ptr two_args(Ptr p, Ptr) { return p; } 35 Ptr three_args(Ptr p, Ptr, Ptr) { return p; } 36 Ptr four_args(Ptr p, Ptr, Ptr, Ptr) { return p; } 37 38 void one_arg_void(Ptr) { } 39 40 int main(int, char**) 41 { 42 Ptr x = nullptr; 43 std::function<Ptr()> f(no_args); f(); 44 std::function<Ptr(Ptr)> g(one_arg); g(x); 45 std::function<void(Ptr)> h(one_arg_void); h(x); 46 return 0; 47 } 48