Jordan Rose | 112344a | 2013-05-01 18:19:59 +0000 | [diff] [blame] | 1 | // RUN: %clang_cc1 -triple x86_64-apple-darwin9 -analyze -analyzer-checker=core,alpha.core,debug.ExprInspection -analyzer-store=region -verify %s |
| 2 | // RUN: %clang_cc1 -triple i386-apple-darwin9 -analyze -analyzer-checker=core,alpha.core,debug.ExprInspection -analyzer-store=region -verify %s |
| 3 | |
| 4 | extern void clang_analyzer_eval(_Bool); |
Zhongxing Xu | 2fc3259 | 2009-04-29 01:50:12 +0000 | [diff] [blame] | 5 | |
Zhongxing Xu | b1080ed | 2009-04-29 05:59:48 +0000 | [diff] [blame] | 6 | // Test if the 'storage' region gets properly initialized after it is cast to |
| 7 | // 'struct sockaddr *'. |
| 8 | |
Ted Kremenek | caac089 | 2009-08-20 04:48:23 +0000 | [diff] [blame] | 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 {}; |
Eli Friedman | cb52d28 | 2009-07-10 20:10:06 +0000 | [diff] [blame] | 16 | |
Chris Lattner | e030358 | 2010-01-09 20:43:19 +0000 | [diff] [blame] | 17 | void getsockname(); |
| 18 | |
Zhongxing Xu | c58e785 | 2009-04-28 13:52:13 +0000 | [diff] [blame] | 19 | void f(int sock) { |
| 20 | struct sockaddr_storage storage; |
| 21 | struct sockaddr* sockaddr = (struct sockaddr*)&storage; |
| 22 | socklen_t addrlen = sizeof(storage); |
| 23 | getsockname(sock, sockaddr, &addrlen); |
| 24 | switch (sockaddr->sa_family) { // no-warning |
| 25 | default: |
| 26 | ; |
| 27 | } |
| 28 | } |
Zhongxing Xu | 88c675f | 2009-06-18 06:29:10 +0000 | [diff] [blame] | 29 | |
| 30 | struct s { |
| 31 | struct s *value; |
| 32 | }; |
| 33 | |
Mike Stump | 9599226 | 2009-07-21 18:45:53 +0000 | [diff] [blame] | 34 | void f1(struct s **pval) { |
Zhongxing Xu | 88c675f | 2009-06-18 06:29:10 +0000 | [diff] [blame] | 35 | int *tbool = ((void*)0); |
| 36 | struct s *t = *pval; |
| 37 | pval = &(t->value); |
Zhongxing Xu | 18e7a3d | 2009-10-14 06:05:09 +0000 | [diff] [blame] | 38 | tbool = (int *)pval; // use the cast-to type 'int *' to create element region. |
Zhongxing Xu | 59c03ff | 2009-06-18 06:49:35 +0000 | [diff] [blame] | 39 | char c = (unsigned char) *tbool; // Should use cast-to type to create symbol. |
Zhongxing Xu | 18e7a3d | 2009-10-14 06:05:09 +0000 | [diff] [blame] | 40 | if (*tbool == -1) // here load the element region with the correct type 'int' |
Anders Carlsson | 9668b1f | 2009-07-30 22:37:41 +0000 | [diff] [blame] | 41 | (void)3; |
Zhongxing Xu | 88c675f | 2009-06-18 06:29:10 +0000 | [diff] [blame] | 42 | } |
| 43 | |
Zhongxing Xu | 005f07b | 2009-06-19 04:51:14 +0000 | [diff] [blame] | 44 | void f2(const char *str) { |
| 45 | unsigned char ch, cl, *p; |
| 46 | |
| 47 | p = (unsigned char *)str; |
| 48 | ch = *p++; // use cast-to type 'unsigned char' to create element region. |
| 49 | cl = *p++; |
| 50 | if(!cl) |
| 51 | cl = 'a'; |
| 52 | } |
Zhongxing Xu | 6607aca | 2010-01-05 11:49:21 +0000 | [diff] [blame] | 53 | |
| 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) { |
| 58 | if (len) { |
| 59 | Byte buf[len]; |
| 60 | memcpy(buf, data, len); |
| 61 | } |
| 62 | } |
Zhongxing Xu | 7b81e8f | 2010-01-14 03:45:06 +0000 | [diff] [blame] | 63 | |
Ted Kremenek | 33ec2f8 | 2010-01-14 19:47:50 +0000 | [diff] [blame] | 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) { |
| 66 | unsigned int foo; |
| 67 | foo = ((long)(p)); |
| 68 | (void) foo; |
Zhongxing Xu | 7b81e8f | 2010-01-14 03:45:06 +0000 | [diff] [blame] | 69 | } |
Anna Zaks | b3b1ae8 | 2012-05-10 21:49:52 +0000 | [diff] [blame] | 70 | |
| 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; |
| 74 | if (seconds) |
| 75 | return 0; |
| 76 | return 0; |
| 77 | } |
Anna Zaks | beca02f | 2013-02-05 19:52:28 +0000 | [diff] [blame] | 78 | |
| 79 | int foo (int* p) { |
| 80 | int y = 0; |
| 81 | if (p == 0) { |
| 82 | if ((*((void**)&p)) == (void*)0) // Test that the cast to void preserves the symbolic region. |
| 83 | return 0; |
| 84 | else |
| 85 | return 5/y; // This code should be unreachable: no-warning. |
| 86 | } |
| 87 | return 0; |
| 88 | } |
Jordan Rose | 112344a | 2013-05-01 18:19:59 +0000 | [diff] [blame] | 89 | |
| 90 | void castsToBool() { |
| 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}} |
| 94 | |
| 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}} |
| 101 | |
| 102 | extern int symbolicInt; |
| 103 | clang_analyzer_eval(symbolicInt); // expected-warning{{UNKNOWN}} |
| 104 | if (symbolicInt) |
| 105 | clang_analyzer_eval(symbolicInt); // expected-warning{{TRUE}} |
| 106 | |
| 107 | extern void *symbolicPointer; |
| 108 | clang_analyzer_eval(symbolicPointer); // expected-warning{{UNKNOWN}} |
| 109 | if (symbolicPointer) |
| 110 | clang_analyzer_eval(symbolicPointer); // expected-warning{{TRUE}} |
| 111 | |
| 112 | int localInt; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 113 | int* ptr = &localInt; |
| 114 | clang_analyzer_eval(ptr); // expected-warning{{TRUE}} |
Jordan Rose | 112344a | 2013-05-01 18:19:59 +0000 | [diff] [blame] | 115 | clang_analyzer_eval(&castsToBool); // expected-warning{{TRUE}} |
| 116 | clang_analyzer_eval("abc"); // expected-warning{{TRUE}} |
| 117 | |
| 118 | extern float globalFloat; |
| 119 | clang_analyzer_eval(globalFloat); // expected-warning{{UNKNOWN}} |
| 120 | } |