[clang] [Clang SA]: add support for mismatched ownership_returns+ownership_takes calls for custom allocation classes (PR #98941)

[Pavel Skripkin via cfe-commits]

================
@@ -60,6 +67,41 @@ void testMalloc8() {
   operator delete[](p); // expected-warning{{Memory allocated by malloc() should be deallocated by free(), not operator delete[]}}
 }
 
+void testMalloc9() {
+  int *p = (int *)my_malloc(sizeof(int));
+  my_free(p); // no warning
+}
+
+void testMalloc10() {
+  int *p = (int *)my_malloc1(sizeof(int));
+  my_free1(p); // no warning
+}
+
+void testMalloc11() {
+  int *p = (int *)my_malloc2(sizeof(int));
+  my_free23(p); // no warning
+}
+
+void testMalloc12() {
+  int *p = (int *)my_malloc1(sizeof(int));
+  my_free(p); // expected-warning{{Memory allocated by my_malloc1() should be deallocated by function that takes ownership of 'malloc1', not my_free(), which takes ownership of 'malloc'}}
----------------
pskrgag wrote:

"malloc" and "malloc1" here means allocation classes (i.e. argument of `ownership_{returns,takes}`, so I decided to wrap them with quotes to make them look different from function names.

 Do you think it's worth wrapping function names as well?

https://github.com/llvm/llvm-project/pull/98941