File: null-deref-path-notes.cpp

package info (click to toggle)
llvm-toolchain-13 1%3A13.0.1-11
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,418,840 kB
  • sloc: cpp: 5,290,826; ansic: 996,570; asm: 544,593; python: 188,212; objc: 72,027; lisp: 30,291; f90: 25,395; sh: 24,898; javascript: 9,780; pascal: 9,398; perl: 7,484; ml: 5,432; awk: 3,523; makefile: 2,913; xml: 953; cs: 573; fortran: 539
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'}}
}
}