forked from OSchip/llvm-project
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
// RUN: %clang_cc1 -analyze -analyzer-checker=debug.ExprInspection -verify %s
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void clang_analyzer_eval(int);
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void clang_analyzer_warnOnDeadSymbol(int);
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int conjure_index();
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void test_that_expr_inspection_works() {
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do {
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int x = conjure_index();
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clang_analyzer_warnOnDeadSymbol(x);
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} while(0); // expected-warning{{SYMBOL DEAD}}
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}
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// These tests verify the reaping of symbols that are only referenced as
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// index values in element regions. Most of the time, depending on where
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// the element region, as Loc value, is stored, it is possible to
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// recover the index symbol in checker code, which is also demonstrated
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// in the return_ptr_range.c test file.
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int arr[3];
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int *test_element_index_lifetime_in_environment_values() {
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int *ptr;
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do {
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int x = conjure_index();
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clang_analyzer_warnOnDeadSymbol(x);
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ptr = arr + x;
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} while (0);
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return ptr;
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}
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void test_element_index_lifetime_in_store_keys() {
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do {
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int x = conjure_index();
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clang_analyzer_warnOnDeadSymbol(x);
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arr[x] = 1;
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if (x) {}
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} while (0); // no-warning
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}
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int *ptr;
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void test_element_index_lifetime_in_store_values() {
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do {
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int x = conjure_index();
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clang_analyzer_warnOnDeadSymbol(x);
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ptr = arr + x;
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} while (0); // no-warning
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}
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struct S1 {
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int field;
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};
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struct S2 {
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struct S1 array[5];
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} s2;
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void test_element_index_lifetime_with_complicated_hierarchy_of_regions() {
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do {
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int x = conjure_index();
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clang_analyzer_warnOnDeadSymbol(x);
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s2.array[x].field = 1;
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if (x) {}
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} while (0); // no-warning
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}
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// Test below checks lifetime of SymbolRegionValue in certain conditions.
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int **ptrptr;
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void test_region_lifetime_as_store_value(int *x) {
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clang_analyzer_warnOnDeadSymbol((int) x);
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*x = 1;
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ptrptr = &x;
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(void)0; // No-op; make sure the environment forgets things and the GC runs.
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clang_analyzer_eval(**ptrptr); // expected-warning{{TRUE}}
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} // no-warning
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