123 lines · cpp
1// RUN: %clang_analyze_cc1 -triple x86_64-apple-darwin10 -analyzer-checker=core,debug.ExprInspection %s -std=c++11 -verify2// RUN: %clang_analyze_cc1 -triple x86_64-pc-windows-msvc19.11.0 -fms-extensions -analyzer-checker=core,debug.ExprInspection %s -std=c++11 -verify3 4#include "Inputs/system-header-simulator-cxx.h"5 6namespace std {7// Intentionally not using an "auto" return type here, as such must also have a definition.8template <typename T, typename U> constexpr int&& forward_like(U&& x) noexcept;9template <typename T> const T& move_if_noexcept(T& x) noexcept;10} // namespace std11 12template <typename T> void clang_analyzer_dump_ref(T&&);13template <typename T> void clang_analyzer_dump_ptr(T*);14void clang_analyzer_eval(bool);15void clang_analyzer_warnIfReached();16 17void testAddressof(int x) {18 clang_analyzer_eval(&x == __builtin_addressof(x)); // expected-warning{{TRUE}}19}20 21void testStdBuiltinLikeFunctions(int x) {22 clang_analyzer_dump_ptr(std::addressof(x)); // expected-warning{{&x}}23 clang_analyzer_dump_ptr(std::__addressof(x)); // expected-warning{{&x}}24 clang_analyzer_dump_ref(std::as_const(x)); // expected-warning{{&x}}25 clang_analyzer_dump_ref(std::forward<int &>(x)); // expected-warning{{&x}}26 clang_analyzer_dump_ref(std::forward_like<int &>(x)); // expected-warning{{&x}}27 clang_analyzer_dump_ref(std::move(x)); // expected-warning{{&x}}28 clang_analyzer_dump_ref(std::move_if_noexcept(x)); // expected-warning{{&x}}29}30 31void testSize() {32 struct {33 int x;34 int y;35 char z;36 } object;37 clang_analyzer_eval(__builtin_object_size(&object.y, 0) == sizeof(object) - sizeof(int)); // expected-warning{{TRUE}}38 39 // Clang can't actually evaluate these builtin "calls", but importantly they don't actually evaluate the argument expression either.40 int i = 0;41 char buf[10];42 clang_analyzer_eval(__builtin_object_size(&buf[i++], 0) == sizeof(buf)); // expected-warning{{FALSE}}43 clang_analyzer_eval(__builtin_object_size(&buf[++i], 0) == sizeof(buf) - 1); // expected-warning{{FALSE}}44 45 clang_analyzer_eval(i == 0); // expected-warning{{TRUE}}46}47 48void test_assume_aligned_1(char *p) {49 char *q;50 51 q = (char*) __builtin_assume_aligned(p, 16);52 clang_analyzer_eval(p == q); // expected-warning{{TRUE}}53}54 55void test_assume_aligned_2(char *p) {56 char *q;57 58 q = (char*) __builtin_assume_aligned(p, 16, 8);59 clang_analyzer_eval(p == q); // expected-warning{{TRUE}}60}61 62void test_assume_aligned_3(char *p) {63 void *q;64 65 q = __builtin_assume_aligned(p, 16, 8);66 clang_analyzer_eval(p == q); // expected-warning{{TRUE}}67}68 69void test_assume_aligned_4(char *p) {70 char *q;71 72 q = (char*) __builtin_assume_aligned(p + 1, 16);73 clang_analyzer_eval(p == q); // expected-warning{{FALSE}}74}75 76void f(int i) {77 __builtin_assume(i < 10);78 clang_analyzer_eval(i < 15); // expected-warning {{TRUE}}79}80 81void g(int i) {82 if (i > 5) {83 __builtin_assume(i < 5);84 clang_analyzer_warnIfReached(); // Assumtion contradicts constraints.85 // We give up the analysis on this path.86 }87}88 89#ifdef _WIN3290namespace ms {91void f(int i) {92 __assume(i < 10);93 clang_analyzer_eval(i < 15); // expected-warning {{TRUE}}94}95 96void g(int i) {97 if (i > 5) {98 __assume(i < 5);99 clang_analyzer_warnIfReached(); // Assumtion contradicts constraints.100 // We give up the analysis on this path.101 }102}103} // namespace ms104#endif105 106void test_constant_p(void *ptr) {107 int i = 1;108 const int j = 2;109 constexpr int k = 3;110 clang_analyzer_eval(__builtin_constant_p(42) == 1); // expected-warning {{TRUE}}111 clang_analyzer_eval(__builtin_constant_p(i) == 0); // expected-warning {{TRUE}}112 clang_analyzer_eval(__builtin_constant_p(j) == 1); // expected-warning {{TRUE}}113 clang_analyzer_eval(__builtin_constant_p(k) == 1); // expected-warning {{TRUE}}114 clang_analyzer_eval(__builtin_constant_p(i + 42) == 0); // expected-warning {{TRUE}}115 clang_analyzer_eval(__builtin_constant_p(j + 42) == 1); // expected-warning {{TRUE}}116 clang_analyzer_eval(__builtin_constant_p(k + 42) == 1); // expected-warning {{TRUE}}117 clang_analyzer_eval(__builtin_constant_p(" ") == 1); // expected-warning {{TRUE}}118 clang_analyzer_eval(__builtin_constant_p(test_constant_p) == 0); // expected-warning {{TRUE}}119 clang_analyzer_eval(__builtin_constant_p(k - 3) == 0); // expected-warning {{FALSE}}120 clang_analyzer_eval(__builtin_constant_p(k - 3) == 1); // expected-warning {{TRUE}}121 clang_analyzer_eval(__builtin_constant_p(ptr == 0)); // expected-warning {{FALSE}}122}123