1 // RUN: %clang_analyze_cc1 -triple x86_64-apple-darwin9 -analyzer-checker=core,alpha.core,debug.ExprInspection -analyzer-store=region -verify %s
2 // RUN: %clang_analyze_cc1 -triple i386-apple-darwin9 -analyzer-checker=core,alpha.core,debug.ExprInspection -analyzer-store=region -verify %s
4 extern void clang_analyzer_eval(_Bool);
6 // Test if the 'storage' region gets properly initialized after it is cast to
7 // 'struct sockaddr *'.
9 typedef unsigned char __uint8_t;
10 typedef unsigned int __uint32_t;
11 typedef __uint32_t __darwin_socklen_t;
12 typedef __uint8_t sa_family_t;
13 typedef __darwin_socklen_t socklen_t;
14 struct sockaddr { sa_family_t sa_family; };
15 struct sockaddr_storage {};
20 struct sockaddr_storage storage;
21 struct sockaddr* sockaddr = (struct sockaddr*)&storage; // expected-warning{{Casting data to a larger structure type and accessing a field can lead to memory access errors or data corruption}}
22 socklen_t addrlen = sizeof(storage);
23 getsockname(sock, sockaddr, &addrlen);
24 switch (sockaddr->sa_family) { // no-warning
34 void f1(struct s **pval) {
35 int *tbool = ((void*)0);
38 tbool = (int *)pval; // use the cast-to type 'int *' to create element region.
39 char c = (unsigned char) *tbool; // Should use cast-to type to create symbol.
40 if (*tbool == -1) // here load the element region with the correct type 'int'
44 void f2(const char *str) {
45 unsigned char ch, cl, *p;
47 p = (unsigned char *)str;
48 ch = *p++; // use cast-to type 'unsigned char' to create element region.
54 // Test cast VariableSizeArray to pointer does not crash.
55 void *memcpy(void *, void const *, unsigned long);
56 typedef unsigned char Byte;
57 void doit(char *data, int len) {
60 memcpy(buf, data, len);
64 // PR 6013 and 6035 - Test that a cast of a pointer to long and then to int does not crash SValuator.
65 void pr6013_6035_test(void *p) {
71 // PR12511 and radar://11215362 - Test that we support SymCastExpr, which represents symbolic int to float cast.
72 char ttt(int intSeconds) {
73 double seconds = intSeconds;
82 if ((*((void**)&p)) == (void*)0) // Test that the cast to void preserves the symbolic region.
85 return 5/y; // This code should be unreachable: no-warning.
91 clang_analyzer_eval(0); // expected-warning{{FALSE}}
92 clang_analyzer_eval(0U); // expected-warning{{FALSE}}
93 clang_analyzer_eval((void *)0); // expected-warning{{FALSE}}
95 clang_analyzer_eval(1); // expected-warning{{TRUE}}
96 clang_analyzer_eval(1U); // expected-warning{{TRUE}}
97 clang_analyzer_eval(-1); // expected-warning{{TRUE}}
98 clang_analyzer_eval(0x100); // expected-warning{{TRUE}}
99 clang_analyzer_eval(0x100U); // expected-warning{{TRUE}}
100 clang_analyzer_eval((void *)0x100); // expected-warning{{TRUE}}
102 extern int symbolicInt;
103 clang_analyzer_eval(symbolicInt); // expected-warning{{UNKNOWN}}
105 clang_analyzer_eval(symbolicInt); // expected-warning{{TRUE}}
107 extern void *symbolicPointer;
108 clang_analyzer_eval(symbolicPointer); // expected-warning{{UNKNOWN}}
110 clang_analyzer_eval(symbolicPointer); // expected-warning{{TRUE}}
113 int* ptr = &localInt;
114 clang_analyzer_eval(ptr); // expected-warning{{TRUE}}
115 clang_analyzer_eval(&castsToBool); // expected-warning{{TRUE}}
116 clang_analyzer_eval("abc"); // expected-warning{{TRUE}}
118 extern float globalFloat;
119 clang_analyzer_eval(globalFloat); // expected-warning{{UNKNOWN}}
122 void locAsIntegerCasts(void *p) {
124 clang_analyzer_eval(++x < 10); // no-crash // expected-warning{{UNKNOWN}}
127 void multiDimensionalArrayPointerCasts() {
128 static int x[10][10];
129 int *y1 = &(x[3][5]);
130 char *z = ((char *) y1) + 2;
131 int *y2 = (int *)(z - 2);
132 int *y3 = ((int *)x) + 35; // This is offset for [3][5].
134 clang_analyzer_eval(y1 == y2); // expected-warning{{TRUE}}
136 // FIXME: should be FALSE (i.e. equal pointers).
137 clang_analyzer_eval(y1 - y2); // expected-warning{{UNKNOWN}}
138 // FIXME: should be TRUE (i.e. same symbol).
139 clang_analyzer_eval(*y1 == *y2); // expected-warning{{UNKNOWN}}
141 clang_analyzer_eval(*((char *)y1) == *((char *) y2)); // expected-warning{{TRUE}}
143 clang_analyzer_eval(y1 == y3); // expected-warning{{TRUE}}
145 // FIXME: should be FALSE (i.e. equal pointers).
146 clang_analyzer_eval(y1 - y3); // expected-warning{{UNKNOWN}}
147 // FIXME: should be TRUE (i.e. same symbol).
148 clang_analyzer_eval(*y1 == *y3); // expected-warning{{UNKNOWN}}
150 clang_analyzer_eval(*((char *)y1) == *((char *) y3)); // expected-warning{{TRUE}}
155 void testCastVoidPtrToIntPtrThroughIntTypedAssignment() {
157 (*((int *)(&x))) = (int)getVoidPtr();
161 void testCastUIntPtrToIntPtrThroughIntTypedAssignment() {
164 (*((int *)(&x))) = (int)&u;
166 clang_analyzer_eval(u == 1); // expected-warning{{TRUE}}
169 void testCastVoidPtrToIntPtrThroughUIntTypedAssignment() {
171 (*((int *)(&x))) = (int)(unsigned *)getVoidPtr();
175 void testLocNonLocSymbolAssume(int a, int *b) {
176 if ((int)b < a) {} // no-crash