forked from OSchip/llvm-project
73 lines
2.9 KiB
C++
73 lines
2.9 KiB
C++
// RUN: %clang_analyze_cc1 -analyzer-checker=core,alpha -analyzer-max-loop 2 -analyzer-config widen-loops=true -analyzer-output=text -verify -analyzer-config eagerly-assume=false %s
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int *p_a;
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int bar();
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int flag_a;
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int test_for_bug_25609() {
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if (p_a == 0) // expected-note {{Assuming 'p_a' is equal to null}}
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// expected-note@-1 {{Taking true branch}}
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bar();
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for (int i = 0; // expected-note {{Loop condition is true. Entering loop body}}
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// expected-note@-1 {{Loop condition is false. Execution continues on line 16}}
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++i, // expected-note {{Value assigned to 'p_a'}}
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i < flag_a;
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++i) {}
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*p_a = 25609; // no-crash expected-warning {{Dereference of null pointer (loaded from variable 'p_a')}}
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// expected-note@-1 {{Dereference of null pointer (loaded from variable 'p_a')}}
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return *p_a;
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}
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int flag_b;
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int while_analyzer_output() {
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flag_b = 100;
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int num = 10;
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while (flag_b-- > 0) { // expected-note {{Loop condition is true. Entering loop body}}
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// expected-note@-1 {{Value assigned to 'num'}}
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// expected-note@-2 {{Loop condition is false. Execution continues on line 30}}
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num = flag_b;
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}
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if (num < 0) // expected-note {{Assuming 'num' is >= 0}}
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// expected-note@-1 {{Taking false branch}}
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flag_b = 0;
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else if (num >= 1) // expected-note {{Assuming 'num' is < 1}}
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// expected-note@-1 {{Taking false branch}}
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flag_b = 50;
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else
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flag_b = 100;
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return flag_b / num; // no-crash expected-warning {{Division by zero}}
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// expected-note@-1 {{Division by zero}}
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}
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int flag_c;
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int do_while_analyzer_output() {
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int num = 10;
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do { // expected-note {{Loop condition is true. Execution continues on line 47}}
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// expected-note@-1 {{Loop condition is false. Exiting loop}}
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num--;
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} while (flag_c-- > 0); //expected-note {{Value assigned to 'num'}}
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int local = 0;
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if (num == 0) // expected-note {{Assuming 'num' is equal to 0}}
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// expected-note@-1 {{Taking true branch}}
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local = 10 / num; // no-crash expected-warning {{Division by zero}}
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// expected-note@-1 {{Division by zero}}
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return local;
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}
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int flag_d;
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int test_for_loop() {
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int num = 10;
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for (int i = 0; // expected-note {{Loop condition is true. Entering loop body}}
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// expected-note@-1 {{Loop condition is false. Execution continues on line 67}}
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new int(10), // expected-note {{Value assigned to 'num'}}
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i < flag_d;
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++i) {
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++num;
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}
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if (num == 0) // expected-note {{Assuming 'num' is equal to 0}}
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// expected-note@-1 {{Taking true branch}}
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flag_d += 10;
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return flag_d / num; // no-crash expected-warning {{Division by zero}}
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// expected-note@-1 {{Division by zero}}
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}
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