xref: /llvm-project/clang/test/Analysis/diagnostics/dtors.cpp (revision b0914e7276bf97cb57f84fecc3a95e0d3ceeaf3e)
1 // RUN: %clang_analyze_cc1 -std=c++14 -w -analyzer-checker=core,cplusplus -analyzer-output=text -verify %s
2 
3 namespace no_crash_on_delete_dtor {
4 // We were crashing when producing diagnostics for this code, but not for the
5 // report that it currently emits. Instead, Static Analyzer was thinking that
6 // p.get()->foo() is a null dereference because it was dropping
7 // constraints over x too early and took a different branch next time
8 // we call .get().
9 struct S {
10   void foo();
11   ~S();
12 };
13 
14 struct smart_ptr {
15   int x;
16   S *s;
17   smart_ptr(S *);
getno_crash_on_delete_dtor::smart_ptr18   S *get() {
19     return (x || 0) ? nullptr : s; // expected-note{{Field 'x' is 0}}
20                                    // expected-note@-1{{Left side of '||' is false}}
21                                    // expected-note@-2{{'?' condition is false}}
22                                    // expected-warning@-3{{Use of memory after it is freed}}
23                                    // expected-note@-4{{Use of memory after it is freed}}
24   }
25 };
26 
bar(smart_ptr p)27 void bar(smart_ptr p) {
28   delete p.get(); // expected-note{{Memory is released}}
29   p.get()->foo(); // expected-note{{Calling 'smart_ptr::get'}}
30 }
31 } // namespace no_crash_on_delete_dtor
32