clang/test/Analysis/retain-release-cpp-classes.cpp

   1 // RUN: %clang_analyze_cc1 -analyzer-checker=core,osx -analyzer-output=text -verify %s
   2
   3 // expected-no-diagnostics
   4
   5 typedef void *CFTypeRef;
   6 typedef struct _CFURLCacheRef *CFURLCacheRef;
   7
   8 CFTypeRef CustomCFRetain(CFTypeRef);
   9 void invalidate(void *);
  10 struct S1 {
  11   CFTypeRef s;
  12   CFTypeRef returnFieldAtPlus0() {
  13     return s;
  14   }
  15 };
  16 struct S2 {
  17   S1 *s1;
  18 };
  19 void foo(S1 *s1) {
  20   invalidate(s1);
  21   S2 s2;
  22   s2.s1 = s1;
  23   CustomCFRetain(s1->returnFieldAtPlus0());
  24
  25   // Definitely no leak end-of-path note here. The retained pointer
  26   // is still accessible through s1 and s2.
  27   ((void) 0); // no-warning
  28
  29   // FIXME: Ideally we need to warn after this invalidate(). The per-function
  30   // retain-release contract is violated: the programmer should release
  31   // the symbol after it was retained, within the same function.
  32   invalidate(&s2);
  33 }