clang/test/Analysis/new-ctor-symbolic.cpp

   1 // RUN: %clang_analyze_cc1 -analyzer-checker=core,debug.ExprInspection -analyzer-config c++-allocator-inlining=true -std=c++11 -verify -analyzer-config eagerly-assume=false %s
   2
   3 void clang_analyzer_eval(bool);
   4 void clang_analyzer_warnOnDeadSymbol(int);
   5
   6 typedef __typeof__(sizeof(int)) size_t;
   7
   8 int conjure();
   9 void exit(int);
  10
  11 struct S {
  12   S() {}
  13   ~S() {}
  14
  15   static S buffer[1000];
  16
  17   // This operator allocates stuff within the buffer. Additionally, it never
  18   // places anything at the beginning of the buffer.
  19   void *operator new(size_t size) {
  20     int i = conjure();
  21     if (i == 0)
  22       exit(1);
  23     // Let's see if the symbol dies before new-expression is evaluated.
  24     // It shouldn't.
  25     clang_analyzer_warnOnDeadSymbol(i);
  26     return buffer + i;
  27   }
  28 };
  29
  30 void testIndexLiveness() {
  31   S *s = new S();
  32   clang_analyzer_eval(s == S::buffer); // expected-warning{{FALSE}}
  33 } // expected-warning{{SYMBOL DEAD}}