llvm-project/clang/test/Analysis/initializer.cpp

// RUN: %clang_cc1 -analyze -analyzer-checker=core,unix.Malloc,debug.ExprInspection -analyzer-config c++-inlining=constructors -std=c++11 -verify %s

void clang_analyzer_eval(bool);

class A {
  int x;
public:
  A();
};

A::A() : x(0) {
  clang_analyzer_eval(x == 0); // expected-warning{{TRUE}}
}


class DirectMember {
  int x;
public:
  DirectMember(int value) : x(value) {}

  int getX() { return x; }
};

void testDirectMember() {
  DirectMember obj(3);
  clang_analyzer_eval(obj.getX() == 3); // expected-warning{{TRUE}}
}


class IndirectMember {
  struct {
    int x;
  };
public:
  IndirectMember(int value) : x(value) {}

  int getX() { return x; }
};

void testIndirectMember() {
  IndirectMember obj(3);
  clang_analyzer_eval(obj.getX() == 3); // expected-warning{{TRUE}}
}


struct DelegatingConstructor {
  int x;
  DelegatingConstructor(int y) { x = y; }
  DelegatingConstructor() : DelegatingConstructor(42) {}
};

void testDelegatingConstructor() {
  DelegatingConstructor obj;
  clang_analyzer_eval(obj.x == 42); // expected-warning{{TRUE}}
}


struct RefWrapper {
  RefWrapper(int *p) : x(*p) {}
  RefWrapper(int &r) : x(r) {}
  int &x;
};

void testReferenceMember() {
  int *p = 0;
  RefWrapper X(p); // expected-warning@-7 {{Dereference of null pointer}}
}

void testReferenceMember2() {
  int *p = 0;
  // FIXME: We should warn here, since we're creating the reference here.
  RefWrapper X(*p); // expected-warning@-12 {{Dereference of null pointer}}
}


extern "C" char *strdup(const char *);

class StringWrapper {
  char *str;
public:
  StringWrapper(const char *input) : str(strdup(input)) {} // no-warning
};


// PR15070 - Constructing a type containing a non-POD array mistakenly
// tried to perform a bind instead of relying on the CXXConstructExpr,
// which caused a cast<> failure in RegionStore.
namespace DefaultConstructorWithCleanups {
  class Element {
  public:
    int value;

    class Helper {
    public:
      ~Helper();
    };
    Element(Helper h = Helper());
  };
  class Wrapper {
  public:
    Element arr[2];

    Wrapper();
  };

  Wrapper::Wrapper() /* initializers synthesized */ {}

  int test() {
    Wrapper w;
    return w.arr[0].value; // no-warning
  }
}