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// RUN: %clang_analyze_cc1 -analyzer-checker=alpha.core.StoreToImmutable -verify %s
// Test basic functionality of StoreToImmutable checker for the C programming language.
const int tentative_global_const; // expected-note {{Memory region is declared as immutable here}}
void test_direct_write_to_tentative_const_global() {
*(int*)&tentative_global_const = 100; // expected-warning {{Trying to write to immutable memory in global read-only storage}}
}
const int global_const = 42; // expected-note {{Memory region is declared as immutable here}}
void test_direct_write_to_const_global() {
// This should trigger a warning about writing to immutable memory
*(int*)&global_const = 100; // expected-warning {{Trying to write to immutable memory in global read-only storage}}
}
void test_write_through_const_pointer() {
const int local_const = 10; // expected-note {{Memory region is declared as immutable here}}
int *ptr = (int*)&local_const;
*ptr = 20; // expected-warning {{Trying to write to immutable memory}}
}
void test_write_to_const_array() {
const int arr[5] = {1, 2, 3, 4, 5}; // expected-note {{Enclosing memory region is declared as immutable here}}
int *ptr = (int*)arr;
ptr[0] = 10; // expected-warning {{Trying to write to immutable memory}}
}
struct TestStruct {
const int x; // expected-note 2 {{Memory region is declared as immutable here}}
int y;
};
void test_write_to_const_struct_member() {
struct TestStruct s = {1, 2};
int *ptr = (int*)&s.x;
*ptr = 10; // expected-warning {{Trying to write to immutable memory}}
}
const int global_array[3] = {1, 2, 3}; // expected-note {{Enclosing memory region is declared as immutable here}}
void test_write_to_const_global_array() {
int *ptr = (int*)global_array;
ptr[0] = 10; // expected-warning {{Trying to write to immutable memory in global read-only storage}}
}
const struct TestStruct global_struct = {1, 2};
void test_write_to_const_global_struct() {
int *ptr = (int*)&global_struct.x;
*ptr = 10; // expected-warning {{Trying to write to immutable memory in global read-only storage}}
}
void test_write_to_const_param(const int param) { // expected-note {{Memory region is declared as immutable here}}
*(int*)¶m = 100; // expected-warning {{Trying to write to immutable memory}}
}
void test_write_to_const_ptr_param(const int *param) {
*(int*)param = 100; // expected-warning {{Trying to write to immutable memory}}
}
void test_write_to_const_array_param(const int arr[5]) {
*(int*)arr = 100; // expected-warning {{Trying to write to immutable memory}}
}
struct ParamStruct {
const int z; // expected-note 2 {{Memory region is declared as immutable here}}
int w;
};
void test_write_to_const_struct_param(const struct ParamStruct s) {
*(int*)&s.z = 100; // expected-warning {{Trying to write to immutable memory}}
}
void test_write_to_const_struct_ptr_param(const struct ParamStruct *s) {
*(int*)&s->z = 100; // expected-warning {{Trying to write to immutable memory}}
}
void test_write_to_nonconst() {
int non_const = 42;
*(int*)&non_const = 100; // No warning expected
}
int global_non_const = 42;
void test_write_to_nonconst_global() {
*(int*)&global_non_const = 100; // No warning expected
}
struct NonConstStruct {
int x;
int y;
};
void test_write_to_nonconst_struct_member() {
struct NonConstStruct s = {1, 2};
*(int*)&s.x = 100; // No warning expected
}
void test_write_to_nonconst_param(int param) {
*(int*)¶m = 100; // No warning expected
}
void test_normal_assignment() {
int x = 42;
x = 100; // No warning expected
}
void test_const_ptr_to_nonconst_data() {
int data = 42;
const int *ptr = &data;
*(int*)ptr = 100; // No warning expected
}
void test_const_ptr_to_const_data() {
const int data = 42; // expected-note {{Memory region is declared as immutable here}}
const int *ptr = &data;
*(int*)ptr = 100; // expected-warning {{Trying to write to immutable memory}}
}
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