1 files changed, 121 insertions, 0 deletions
diff --git a/clang/test/Analysis/store-to-immutable-basic.c b/clang/test/Analysis/store-to-immutable-basic.c
new file mode 100644
index 0000000..f7d8878
--- /dev/null
+++ b/clang/test/Analysis/store-to-immutable-basic.c
@@ -0,0 +1,121 @@
+// 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*)&param = 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*)&param = 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}}
+}