clang/test/Analysis/func.c

   1 // RUN: %clang_analyze_cc1 -analyzer-checker=core,alpha.core,debug.ExprInspection -analyzer-store=region -verify -analyzer-config eagerly-assume=false %s
   2
   3 void clang_analyzer_eval(int);
   4 void clang_analyzer_warnIfReached(void);
   5
   6 void f(void) {
   7   void (*p)(void);
   8   p = f;
   9   p = &f;
  10   p();
  11   (*p)();
  12 }
  13
  14 void g(void (*fp)(void));
  15
  16 void f2(void) {
  17   g(f);
  18 }
  19
  20 void f3(void (*f)(void), void (*g)(void)) {
  21   clang_analyzer_eval(!f); // expected-warning{{UNKNOWN}}
  22   f();
  23   clang_analyzer_eval(!f); // expected-warning{{FALSE}}
  24
  25   clang_analyzer_eval(!g); // expected-warning{{UNKNOWN}}
  26   (*g)();
  27   clang_analyzer_eval(!g); // expected-warning{{FALSE}}
  28 }
  29
  30 void nullFunctionPointerConstant(void) {
  31   void (*f)(void) = 0;
  32   f(); // expected-warning{{Called function pointer is null}}
  33   clang_analyzer_warnIfReached(); // no-warning
  34 }
  35
  36 void nullFunctionPointerConstraint(void (*f)(void)) {
  37   if (f)
  38     return;
  39   f(); // expected-warning{{Called function pointer is null}}
  40   clang_analyzer_warnIfReached(); // no-warning
  41 }