File: null-deref-path-notes.cpp

package info (click to toggle)
swiftlang 6.0.3-2
  • links: PTS, VCS
  • area: main
  • in suites: sid, trixie
  • size: 2,519,992 kB
  • sloc: cpp: 9,107,863; ansic: 2,040,022; asm: 1,135,751; python: 296,500; objc: 82,456; f90: 60,502; lisp: 34,951; pascal: 19,946; sh: 18,133; perl: 7,482; ml: 4,937; javascript: 4,117; makefile: 3,840; awk: 3,535; xml: 914; fortran: 619; cs: 573; ruby: 573
file content (25 lines) | stat: -rw-r--r-- 811 bytes parent folder | download | duplicates (20) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
 
// RUN: %clang_analyze_cc1 -w -x c++ -analyzer-checker=core -analyzer-output=text -verify %s

namespace pr34731 {
int b;
class c {
  class B {
   public:
    double ***d;
    B();
  };
  void e(double **, int);
  void f(B &, int &);
};

// Properly track the null pointer in the array field back to the default
// constructor of 'h'.
void c::f(B &g, int &i) {
  e(g.d[9], i); // expected-warning{{Array access (via field 'd') results in a null pointer dereference}}
                // expected-note@-1{{Array access (via field 'd') results in a null pointer dereference}}
  B h, a; // expected-note{{Value assigned to 'h.d'}}
  a.d == __null; // expected-note{{Assuming the condition is true}}
  a.d != h.d; // expected-note{{Assuming 'a.d' is equal to 'h.d'}}
  f(h, b); // expected-note{{Calling 'c::f'}}
}
}