clang/test/Analysis/model-file.cpp

   1 // RUN: %clang_analyze_cc1 -analyzer-checker=core -analyzer-config faux-bodies=true,model-path=%S/Inputs/Models -analyzer-output=plist-multi-file -verify %s -o %t
   2 // RUN: %normalize_plist <%t | diff -ub %S/Inputs/expected-plists/model-file.cpp.plist -
   3
   4 typedef int* intptr;
   5
   6 // This function is modeled and the p pointer is dereferenced in the model
   7 // function and there is no function definition available. The modeled
   8 // function can use any types that are available in the original translation
   9 // unit, for example intptr in this case.
  10 void modeledFunction(intptr p);
  11
  12 // This function is modeled and returns true if the parameter is not zero
  13 // and there is no function definition available.
  14 bool notzero(int i);
  15
  16 // This functions is not modeled and there is no function definition.
  17 // available
  18 bool notzero_notmodeled(int i);
  19
  20 int main() {
  21   // There is a nullpointer dereference inside this function.
  22   modeledFunction(0);
  23
  24   int p = 0;
  25   if (notzero(p)) {
  26    // It is known that p != 0 because of the information provided by the
  27    // model of the notzero function.
  28     int j = 5 / p;
  29   }
  30
  31   if (notzero_notmodeled(p)) {
  32    // There is no information about the value of p, because
  33    // notzero_notmodeled is not modeled and the function definition
  34    // is not available.
  35     int j = 5 / p; // expected-warning {{Division by zero}}
  36   }
  37
  38   return 0;
  39 }
  40