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// RUN: %clang_analyze_cc1 -analyzer-checker=debug.ExprInspection -verify %s
void clang_analyzer_eval(int);
void clang_analyzer_warnOnDeadSymbol(int);
void clang_analyzer_numTimesReached();
int conjure_index();
void test_that_expr_inspection_works() {
do {
int x = conjure_index();
clang_analyzer_warnOnDeadSymbol(x);
} while(0); // expected-warning{{SYMBOL DEAD}}
// Make sure we don't accidentally split state in ExprInspection.
clang_analyzer_numTimesReached(); // expected-warning{{1}}
}
// These tests verify the reaping of symbols that are only referenced as
// index values in element regions. Most of the time, depending on where
// the element region, as Loc value, is stored, it is possible to
// recover the index symbol in checker code, which is also demonstrated
// in the return_ptr_range.c test file.
int arr[3];
int *test_element_index_lifetime_in_environment_values() {
int *ptr;
do {
int x = conjure_index();
clang_analyzer_warnOnDeadSymbol(x);
ptr = arr + x;
} while (0);
return ptr;
}
void test_element_index_lifetime_in_store_keys() {
do {
int x = conjure_index();
clang_analyzer_warnOnDeadSymbol(x);
arr[x] = 1;
if (x) {}
} while (0); // no-warning
}
int *ptr;
void test_element_index_lifetime_in_store_values() {
do {
int x = conjure_index();
clang_analyzer_warnOnDeadSymbol(x);
ptr = arr + x;
} while (0); // no-warning
}
struct S1 {
int field;
};
struct S2 {
struct S1 array[5];
} s2;
void test_element_index_lifetime_with_complicated_hierarchy_of_regions() {
do {
int x = conjure_index();
clang_analyzer_warnOnDeadSymbol(x);
s2.array[x].field = 1;
if (x) {}
} while (0); // no-warning
}
// Test below checks lifetime of SymbolRegionValue in certain conditions.
int **ptrptr;
void test_region_lifetime_as_store_value(int *x) {
clang_analyzer_warnOnDeadSymbol((int) x);
*x = 1;
ptrptr = &x;
(void)0; // No-op; make sure the environment forgets things and the GC runs.
clang_analyzer_eval(**ptrptr); // expected-warning{{TRUE}}
} // no-warning
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