| 1 | // RUN: %clang_analyze_cc1 -analyzer-checker=apiModeling.StdCLibraryFunctions,debug.ExprInspection -verify -analyzer-config eagerly-assume=false %s |
| 2 | // RUN: %clang_analyze_cc1 -triple i686-unknown-linux -analyzer-checker=apiModeling.StdCLibraryFunctions,debug.ExprInspection -verify -analyzer-config eagerly-assume=false %s |
| 3 | // RUN: %clang_analyze_cc1 -triple x86_64-unknown-linux -analyzer-checker=apiModeling.StdCLibraryFunctions,debug.ExprInspection -verify -analyzer-config eagerly-assume=false %s |
| 4 | // RUN: %clang_analyze_cc1 -triple armv7-a15-linux -analyzer-checker=apiModeling.StdCLibraryFunctions,debug.ExprInspection -verify -analyzer-config eagerly-assume=false %s |
| 5 | // RUN: %clang_analyze_cc1 -triple thumbv7-a15-linux -analyzer-checker=apiModeling.StdCLibraryFunctions,debug.ExprInspection -verify -analyzer-config eagerly-assume=false %s |
| 6 | |
| 7 | void clang_analyzer_eval(int); |
| 8 | |
| 9 | int glob; |
| 10 | |
| 11 | typedef struct FILE FILE; |
| 12 | #define EOF -1 |
| 13 | |
| 14 | int getc(FILE *); |
| 15 | void test_getc(FILE *fp) { |
| 16 | int x; |
| 17 | while ((x = getc(fp)) != EOF) { |
| 18 | clang_analyzer_eval(x > 255); // expected-warning{{FALSE}} |
| 19 | clang_analyzer_eval(x >= 0); // expected-warning{{TRUE}} |
| 20 | } |
| 21 | } |
| 22 | |
| 23 | int fgetc(FILE *); |
| 24 | void test_fgets(FILE *fp) { |
| 25 | clang_analyzer_eval(fgetc(fp) < 256); // expected-warning{{TRUE}} |
| 26 | clang_analyzer_eval(fgetc(fp) >= 0); // expected-warning{{UNKNOWN}} |
| 27 | } |
| 28 | |
| 29 | |
| 30 | typedef typeof(sizeof(int)) size_t; |
| 31 | typedef signed long ssize_t; |
| 32 | ssize_t read(int, void *, size_t); |
| 33 | ssize_t write(int, const void *, size_t); |
| 34 | void test_read_write(int fd, char *buf) { |
| 35 | glob = 1; |
| 36 | ssize_t x = write(fd, buf, 10); |
| 37 | clang_analyzer_eval(glob); // expected-warning{{UNKNOWN}} |
| 38 | if (x >= 0) { |
| 39 | clang_analyzer_eval(x <= 10); // expected-warning{{TRUE}} |
| 40 | ssize_t y = read(fd, &glob, sizeof(glob)); |
| 41 | if (y >= 0) { |
| 42 | clang_analyzer_eval(y <= sizeof(glob)); // expected-warning{{TRUE}} |
| 43 | } else { |
| 44 | // -1 overflows on promotion! |
| 45 | clang_analyzer_eval(y <= sizeof(glob)); // expected-warning{{FALSE}} |
| 46 | } |
| 47 | } else { |
| 48 | clang_analyzer_eval(x == -1); // expected-warning{{TRUE}} |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | size_t fread(void *, size_t, size_t, FILE *); |
| 53 | size_t fwrite(const void *restrict, size_t, size_t, FILE *restrict); |
| 54 | void test_fread_fwrite(FILE *fp, int *buf) { |
| 55 | size_t x = fwrite(buf, sizeof(int), 10, fp); |
| 56 | clang_analyzer_eval(x <= 10); // expected-warning{{TRUE}} |
| 57 | size_t y = fread(buf, sizeof(int), 10, fp); |
| 58 | clang_analyzer_eval(y <= 10); // expected-warning{{TRUE}} |
| 59 | size_t z = fwrite(buf, sizeof(int), y, fp); |
| 60 | clang_analyzer_eval(z <= y); // expected-warning{{TRUE}} |
| 61 | } |
| 62 | |
| 63 | ssize_t getline(char **, size_t *, FILE *); |
| 64 | void test_getline(FILE *fp) { |
| 65 | char *line = 0; |
| 66 | size_t n = 0; |
| 67 | ssize_t len; |
| 68 | while ((len = getline(&line, &n, fp)) != -1) { |
| 69 | clang_analyzer_eval(len == 0); // expected-warning{{FALSE}} |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | int isascii(int); |
| 74 | void test_isascii(int x) { |
| 75 | clang_analyzer_eval(isascii(123)); // expected-warning{{TRUE}} |
| 76 | clang_analyzer_eval(isascii(-1)); // expected-warning{{FALSE}} |
| 77 | if (isascii(x)) { |
| 78 | clang_analyzer_eval(x < 128); // expected-warning{{TRUE}} |
| 79 | clang_analyzer_eval(x >= 0); // expected-warning{{TRUE}} |
| 80 | } else { |
| 81 | if (x > 42) |
| 82 | clang_analyzer_eval(x >= 128); // expected-warning{{TRUE}} |
| 83 | else |
| 84 | clang_analyzer_eval(x < 0); // expected-warning{{TRUE}} |
| 85 | } |
| 86 | glob = 1; |
| 87 | isascii('a'); |
| 88 | clang_analyzer_eval(glob); // expected-warning{{TRUE}} |
| 89 | } |
| 90 | |
| 91 | int islower(int); |
| 92 | void test_islower(int x) { |
| 93 | clang_analyzer_eval(islower('x')); // expected-warning{{TRUE}} |
| 94 | clang_analyzer_eval(islower('X')); // expected-warning{{FALSE}} |
| 95 | if (islower(x)) |
| 96 | clang_analyzer_eval(x < 'a'); // expected-warning{{FALSE}} |
| 97 | } |
| 98 | |
| 99 | int getchar(void); |
| 100 | void test_getchar() { |
| 101 | int x = getchar(); |
| 102 | if (x == EOF) |
| 103 | return; |
| 104 | clang_analyzer_eval(x < 0); // expected-warning{{FALSE}} |
| 105 | clang_analyzer_eval(x < 256); // expected-warning{{TRUE}} |
| 106 | } |
| 107 | |
| 108 | int isalpha(int); |
| 109 | void test_isalpha() { |
| 110 | clang_analyzer_eval(isalpha(']')); // expected-warning{{FALSE}} |
| 111 | clang_analyzer_eval(isalpha('Q')); // expected-warning{{TRUE}} |
| 112 | clang_analyzer_eval(isalpha(128)); // expected-warning{{UNKNOWN}} |
| 113 | } |
| 114 | |
| 115 | int isalnum(int); |
| 116 | void test_alnum() { |
| 117 | clang_analyzer_eval(isalnum('1')); // expected-warning{{TRUE}} |
| 118 | clang_analyzer_eval(isalnum(')')); // expected-warning{{FALSE}} |
| 119 | } |
| 120 | |
| 121 | int isblank(int); |
| 122 | void test_isblank() { |
| 123 | clang_analyzer_eval(isblank('\t')); // expected-warning{{TRUE}} |
| 124 | clang_analyzer_eval(isblank(' ')); // expected-warning{{TRUE}} |
| 125 | clang_analyzer_eval(isblank('\n')); // expected-warning{{FALSE}} |
| 126 | } |
| 127 | |
| 128 | int ispunct(int); |
| 129 | void test_ispunct(int x) { |
| 130 | clang_analyzer_eval(ispunct(' ')); // expected-warning{{FALSE}} |
| 131 | clang_analyzer_eval(ispunct(-1)); // expected-warning{{FALSE}} |
| 132 | clang_analyzer_eval(ispunct('#')); // expected-warning{{TRUE}} |
| 133 | clang_analyzer_eval(ispunct('_')); // expected-warning{{TRUE}} |
| 134 | if (ispunct(x)) |
| 135 | clang_analyzer_eval(x < 127); // expected-warning{{TRUE}} |
| 136 | } |
| 137 | |
| 138 | int isupper(int); |
| 139 | void test_isupper(int x) { |
| 140 | if (isupper(x)) |
| 141 | clang_analyzer_eval(x < 'A'); // expected-warning{{FALSE}} |
| 142 | } |
| 143 | |
| 144 | int isgraph(int); |
| 145 | int isprint(int); |
| 146 | void test_isgraph_isprint(int x) { |
| 147 | char y = x; |
| 148 | if (isgraph(y)) |
| 149 | clang_analyzer_eval(isprint(x)); // expected-warning{{TRUE}} |
| 150 | } |
| 151 | |
| 152 | int isdigit(int); |
| 153 | void test_mixed_branches(int x) { |
| 154 | if (isdigit(x)) { |
| 155 | clang_analyzer_eval(isgraph(x)); // expected-warning{{TRUE}} |
| 156 | clang_analyzer_eval(isblank(x)); // expected-warning{{FALSE}} |
| 157 | } else if (isascii(x)) { |
| 158 | // isalnum() bifurcates here. |
| 159 | clang_analyzer_eval(isalnum(x)); // expected-warning{{TRUE}} // expected-warning{{FALSE}} |
| 160 | clang_analyzer_eval(isprint(x)); // expected-warning{{TRUE}} // expected-warning{{FALSE}} |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | int isspace(int); |
| 165 | void test_isspace(int x) { |
| 166 | if (!isascii(x)) |
| 167 | return; |
| 168 | char y = x; |
| 169 | if (y == ' ') |
| 170 | clang_analyzer_eval(isspace(x)); // expected-warning{{TRUE}} |
| 171 | } |
| 172 | |
| 173 | int isxdigit(int); |
| 174 | void test_isxdigit(int x) { |
| 175 | if (isxdigit(x) && isupper(x)) { |
| 176 | clang_analyzer_eval(x >= 'A'); // expected-warning{{TRUE}} |
| 177 | clang_analyzer_eval(x <= 'F'); // expected-warning{{TRUE}} |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | void test_call_by_pointer() { |
| 182 | typedef int (*func)(int); |
| 183 | func f = isascii; |
| 184 | clang_analyzer_eval(f('A')); // expected-warning{{TRUE}} |
| 185 | f = ispunct; |
| 186 | clang_analyzer_eval(f('A')); // expected-warning{{FALSE}} |
| 187 | } |
| 188 | |