1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 | // RUN: %clang_analyze_cc1 -analyzer-checker=core,unix.Malloc,debug.ExprInspection -analyzer-max-loop 4 -analyzer-config widen-loops=true -verify %s // RUN: %clang_analyze_cc1 -DTEST_NULL_TERM -analyzer-checker=core,unix.Malloc,debug.ExprInspection,alpha.cplusplus.IteratorRange -analyzer-max-loop 4 -analyzer-config widen-loops=true -verify %s void clang_analyzer_eval(int); void clang_analyzer_warnIfReached(); typedef __typeof(sizeof(int)) size_t; void *malloc(size_t); void free(void *); void loop_which_iterates_limit_times_not_widened() { int i; int x = 1; // Check loop isn't widened by checking x isn't invalidated for (i = 0; i < 1; ++i) {} clang_analyzer_eval(x == 1); // expected-warning {{TRUE}} for (i = 0; i < 2; ++i) {} clang_analyzer_eval(x == 1); // expected-warning {{TRUE}} for (i = 0; i < 3; ++i) {} // FIXME loss of precision as a result of evaluating the widened loop body // *instead* of the last iteration. clang_analyzer_eval(x == 1); // expected-warning {{UNKNOWN}} } int a_global; void loop_evaluated_before_widening() { int i; a_global = 1; for (i = 0; i < 10; ++i) { if (i == 2) { // True before widening then unknown after. clang_analyzer_eval(a_global == 1); // expected-warning{{TRUE}} expected-warning{{UNKNOWN}} } } clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}} } void warnings_after_loop() { int i; for (i = 0; i < 10; ++i) {} char *m = (char*)malloc(12); } // expected-warning {{Potential leak of memory pointed to by 'm'}} void for_loop_exits() { int i; for (i = 0; i < 10; ++i) {} clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}} } void while_loop_exits() { int i = 0; while (i < 10) {++i;} clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}} } void do_while_loop_exits() { int i = 0; do {++i;} while (i < 10); clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}} } void loop_body_is_widened() { int i = 0; while (i < 100) { if (i > 10) { clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}} } ++i; } clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}} } void invariably_infinite_loop() { int i = 0; while (1) { ++i; } clang_analyzer_warnIfReached(); // no-warning } void invariably_infinite_break_loop() { int i = 0; while (1) { ++i; int x = 1; if (!x) break; } clang_analyzer_warnIfReached(); // no-warning } void reachable_break_loop() { int i = 0; while (1) { ++i; if (i == 100) break; } clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}} } void condition_constrained_true_in_loop() { int i = 0; while (i < 50) { clang_analyzer_eval(i < 50); // expected-warning {{TRUE}} ++i; } clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}} } void condition_constrained_false_after_loop() { int i = 0; while (i < 50) { ++i; } clang_analyzer_eval(i >= 50); // expected-warning {{TRUE}} clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}} } void multiple_exit_test() { int x = 0; int i = 0; while (i < 50) { if (x) { i = 10; break; } ++i; } // Reachable by 'normal' exit if (i == 50) clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}} // Reachable by break point if (i == 10) clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}} // Not reachable if (i < 10) clang_analyzer_warnIfReached(); // no-warning if (i > 10 && i < 50) clang_analyzer_warnIfReached(); // no-warning } void pointer_doesnt_leak_from_loop() { int *h_ptr = (int *) malloc(sizeof(int)); for (int i = 0; i < 2; ++i) {} for (int i = 0; i < 10; ++i) {} // no-warning free(h_ptr); } int g_global; void unknown_after_loop(int s_arg) { g_global = 0; s_arg = 1; int s_local = 2; int *h_ptr = malloc(sizeof(int)); for (int i = 0; i < 10; ++i) {} clang_analyzer_eval(g_global); // expected-warning {{UNKNOWN}} clang_analyzer_eval(s_arg); // expected-warning {{UNKNOWN}} clang_analyzer_eval(s_local); // expected-warning {{UNKNOWN}} clang_analyzer_eval(h_ptr == 0); // expected-warning {{UNKNOWN}} free(h_ptr); } void variable_bound_exiting_loops_widened(int x) { int i = 0; int t = 1; while (i < x) { ++i; } clang_analyzer_eval(t == 1); // expected-warning {{TRUE}} // expected-warning {{UNKNOWN}} } void nested_loop_outer_widen() { int i = 0, j = 0; for (i = 0; i < 10; i++) { clang_analyzer_eval(i < 10); // expected-warning {{TRUE}} for (j = 0; j < 2; j++) { clang_analyzer_eval(j < 2); // expected-warning {{TRUE}} } clang_analyzer_eval(j >= 2); // expected-warning {{TRUE}} } clang_analyzer_eval(i >= 10); // expected-warning {{TRUE}} } void nested_loop_inner_widen() { int i = 0, j = 0; for (i = 0; i < 2; i++) { clang_analyzer_eval(i < 2); // expected-warning {{TRUE}} for (j = 0; j < 10; j++) { clang_analyzer_eval(j < 10); // expected-warning {{TRUE}} } clang_analyzer_eval(j >= 10); // expected-warning {{TRUE}} } clang_analyzer_eval(i >= 2); // expected-warning {{TRUE}} } #ifdef TEST_NULL_TERM void null_terminator_loop_widen(int *a) { int c; // Loop widening will call 'invalidateRegions()' and 'invalidateRegions()' // will construct the SymbolConjured with null Stmt because of the null // terminator statement. Accessing the null Stmt will cause a crash. for (;;) { c = *a; // no-crash a++; } } #endif |