gdb/testsuite/gdb.cp/classes.cc

/* This testcase is part of GDB, the GNU debugger.

   Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2004, 2007,
   2008, 2009 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
   */

// Test various -*- C++ -*- things.

// ====================== basic C++ types  =======================
bool            v_bool;
bool            v_bool_array[2];

typedef struct fleep fleep;
struct fleep { int a; } s;

// ====================== simple class structures  =======================

struct default_public_struct {
 // defaults to public:
  int a;
  int b;
};

struct explicit_public_struct {
 public:
  int a;
  int b;
};

struct protected_struct {
 protected:
  int a;
  int b;
};

struct private_struct {
 private:
  int a;
  int b;
};

struct mixed_protection_struct {
 public:
  int a;
  int b;
 private:
  int c;
  int d;
 protected:
  int e;
  int f;
 public:
  int g;
 private:
  int h;
 protected:
  int i;
};

class public_class {
 public:
  int a;
  int b;
};

class protected_class {
 protected:
  int a;
  int b;
};

class default_private_class {
 // defaults to private:
  int a;
  int b;
};

class explicit_private_class {
 private:
  int a;
  int b;
};

class mixed_protection_class {
 public:
  int a;
  int b;
 private:
  int c;
  int d;
 protected:
  int e;
  int f;
 public:
  int g;
 private:
  int h;
 protected:
  int i;
};

class const_vol_method_class {
public:
  int a;
  int b;
  int foo (int &) const;
  int bar (int &) volatile;
  int baz (int &) const volatile;
};

int const_vol_method_class::foo (int & ir) const
{
  return ir + 3;
}
int const_vol_method_class::bar (int & ir) volatile
{
  return ir + 4;
}
int const_vol_method_class::baz (int & ir) const volatile
{
  return ir + 5;
}

// ========================= simple inheritance ==========================

class A {
 public:
  int a;
  int x;
};

A g_A;

class B : public A {
 public:
  int b;
  int x;
};

B g_B;

class C : public A {
 public:
  int c;
  int x;
};

C g_C;

class D : public B, public C {
 public:
  int d;
  int x;
};

D g_D;

class E : public D {
 public:
  int e;
  int x;
};

E g_E;

class class_with_anon_union
{
 public:
  int one;
  union
  {
    int a;
    long b;
  };
};

class_with_anon_union g_anon_union;

void inheritance2 (void)
{
}

void inheritance1 (void)
{
  int ival;
  int *intp;

  // {A::a, A::x}

  g_A.A::a = 1;
  g_A.A::x = 2;

  // {{A::a,A::x},B::b,B::x}

  g_B.A::a = 3;
  g_B.A::x = 4;
  g_B.B::b = 5;
  g_B.B::x = 6;

  // {{A::a,A::x},C::c,C::x}

  g_C.A::a = 7;
  g_C.A::x = 8;
  g_C.C::c = 9;
  g_C.C::x = 10;

  // {{{A::a,A::x},B::b,B::x},{{A::a,A::x},C::c,C::x},D::d,D::x}

  // The following initialization code is non-portable, but allows us
  // to initialize all members of g_D until we can fill in the missing
  // initialization code with legal C++ code.

  for (intp = (int *) &g_D, ival = 11;
       intp < ((int *) &g_D + sizeof (g_D) / sizeof (int));
       intp++, ival++)
    {
      *intp = ival;
    }

  // Overlay the nonportable initialization with legal initialization.

  // ????? = 11;  (g_D.A::a = 11; is ambiguous)
  // ????? = 12;  (g_D.A::x = 12; is ambiguous)
/* djb 6-3-2000

	This should take care of it. Rather than try to initialize using an ambiguous
	construct, use 2 unambiguous ones for each. Since the ambiguous a/x member is
	coming from C, and B, initialize D's C::a, and B::a, and D's C::x and B::x.
 */
  g_D.C::a = 15;
  g_D.C::x = 12;
  g_D.B::a = 11;
  g_D.B::x = 12;
  g_D.B::b = 13;
  g_D.B::x = 14;
  // ????? = 15;
  // ????? = 16;
  g_D.C::c = 17;
  g_D.C::x = 18;
  g_D.D::d = 19;
  g_D.D::x = 20;


  // {{{{A::a,A::x},B::b,B::x},{{A::a,A::x},C::c,C::x},D::d,D::x}},E::e,E::x}

  // The following initialization code is non-portable, but allows us
  // to initialize all members of g_D until we can fill in the missing
  // initialization code with legal C++ code.

  for (intp = (int *) &g_E, ival = 21;
       intp < ((int *) &g_E + sizeof (g_E) / sizeof (int));
       intp++, ival++)
  {
    *intp = ival;
  }

  // Overlay the nonportable initialization with legal initialization.

  // ????? = 21;  (g_E.A::a = 21; is ambiguous)
  // ????? = 22;  (g_E.A::x = 22; is ambiguous)
  g_E.B::b = 23;
  g_E.B::x = 24;
  // ????? = 25;
  // ????? = 26;
  g_E.C::c = 27;
  g_E.C::x = 28;
  g_E.D::d = 29;
  g_E.D::x = 30;
  g_E.E::e = 31;
  g_E.E::x = 32;

  g_anon_union.one = 1;
  g_anon_union.a = 2;

  inheritance2 ();	
}

// ======================== static member functions =====================

class Static {
public:
  static void ii(int, int);
};
void Static::ii (int, int) { }

// ======================== virtual base classes=========================

class vA {
 public:
  int va;
  int vx;
};

vA g_vA;

class vB : public virtual vA {
 public:
  int vb;
  int vx;
};

vB g_vB;

class vC : public virtual vA {
 public:
  int vc;
  int vx;
};

vC g_vC;

class vD : public virtual vB, public virtual vC {
 public:
  int vd;
  int vx;
};

vD g_vD;

class vE : public virtual vD {
 public:
  int ve;
  int vx;
};

vE g_vE;

void inheritance4 (void)
{
}

void inheritance3 (void)
{
  int ival;
  int *intp;

  // {vA::va, vA::vx}

  g_vA.vA::va = 1;
  g_vA.vA::vx = 2;

  // {{vA::va, vA::vx}, vB::vb, vB::vx}

  g_vB.vA::va = 3;
  g_vB.vA::vx = 4;
  g_vB.vB::vb = 5;
  g_vB.vB::vx = 6;

  // {{vA::va, vA::vx}, vC::vc, vC::vx}

  g_vC.vA::va = 7;
  g_vC.vA::vx = 8;
  g_vC.vC::vc = 9;
  g_vC.vC::vx = 10;

  // {{{{vA::va, vA::vx}, vB::vb, vB::vx}, vC::vc, vC::vx}, vD::vd,vD::vx}

  g_vD.vA::va = 11;
  g_vD.vA::vx = 12;
  g_vD.vB::vb = 13;
  g_vD.vB::vx = 14;
  g_vD.vC::vc = 15;
  g_vD.vC::vx = 16;
  g_vD.vD::vd = 17;
  g_vD.vD::vx = 18;


  // {{{{{vA::va,vA::vx},vB::vb,vB::vx},vC::vc,vC::vx},vD::vd,vD::vx},vE::ve,vE::vx}

  g_vD.vA::va = 19;
  g_vD.vA::vx = 20;
  g_vD.vB::vb = 21;
  g_vD.vB::vx = 22;
  g_vD.vC::vc = 23;
  g_vD.vC::vx = 24;
  g_vD.vD::vd = 25;
  g_vD.vD::vx = 26;
  g_vE.vE::ve = 27;
  g_vE.vE::vx = 28;

  inheritance4 ();	
}

// ======================================================================

class Base1 {
 public:
  int x;
  Base1(int i) { x = i; }
};

class Foo
{
 public:
  int x;
  int y;
  static int st;
  Foo (int i, int j) { x = i; y = j; }
  int operator! ();
  operator int ();
  int times (int y);
};

class Bar : public Base1, public Foo {
 public:
  int z;
  Bar (int i, int j, int k) : Base1 (10*k), Foo (i, j) { z = k; }
};

int Foo::operator! () { return !x; }

int Foo::times (int y) { return x * y; }

int Foo::st = 100;

Foo::operator int() { return x; }

Foo foo(10, 11);
Bar bar(20, 21, 22);

class ClassWithEnum {
public:
  enum PrivEnum { red, green, blue, yellow = 42 };
  PrivEnum priv_enum;
  int x;
};

void enums2 (void)
{
}

/* classes.exp relies on statement order in this function for testing
   enumeration fields.  */

void enums1 ()
{
  ClassWithEnum obj_with_enum;
  obj_with_enum.priv_enum = ClassWithEnum::red;
  obj_with_enum.x = 0;
  enums2 ();
  obj_with_enum.priv_enum = ClassWithEnum::green;
  obj_with_enum.x = 1;
}

class ClassParam {
public:
  int Aptr_a (A *a) { return a->a; }
  int Aptr_x (A *a) { return a->x; }
  int Aref_a (A &a) { return a.a; }
  int Aref_x (A &a) { return a.x; }
  int Aval_a (A a) { return a.a; }
  int Aval_x (A a) { return a.x; }
};

ClassParam class_param;

class Contains_static_instance
{
 public:
  int x;
  int y;
  Contains_static_instance (int i, int j) { x = i; y = j; }
  static Contains_static_instance null;
};

Contains_static_instance Contains_static_instance::null(0,0);
Contains_static_instance csi(10,20);

class Contains_nested_static_instance
{
 public:
  class Nested
  {
   public:
    Nested(int i) : z(i) {}
    int z;
    static Contains_nested_static_instance xx;
  };

  Contains_nested_static_instance(int i, int j) : x(i), y(j) {}

  int x;
  int y;

  static Contains_nested_static_instance null;
  static Nested yy;
};

Contains_nested_static_instance Contains_nested_static_instance::null(0, 0);
Contains_nested_static_instance::Nested Contains_nested_static_instance::yy(5);
Contains_nested_static_instance
  Contains_nested_static_instance::Nested::xx(1,2);
Contains_nested_static_instance cnsi(30,40);

typedef struct {
  int one;
  int two;
} tagless_struct;
tagless_struct v_tagless;

/* Try to get the compiler to allocate a class in a register.  */
class small {
 public:
  int x;
  int method ();
};

int
small::method ()
{
  return x + 5;
}

void marker_reg1 () {}

int
register_class ()
{
  /* We don't call any methods for v, so gcc version cygnus-2.3.3-930220
     might put this variable in a register.  This is a lose, though, because
     it means that GDB can't call any methods for that variable.  */
  register small v;

  int i;

  /* Perform a computation sufficiently complicated that optimizing compilers
     won't optimized out the variable.  If some compiler constant-folds this
     whole loop, maybe using a parameter to this function here would help.  */
  v.x = 0;
  for (i = 0; i < 13; ++i)
    v.x += i;
  --v.x; /* v.x is now 77 */
  marker_reg1 ();
  return v.x + 5;
}

void dummy()
{
  v_bool = true;
  v_bool_array[0] = false;
  v_bool_array[1] = v_bool;
}

void use_methods ()
{
  /* Refer to methods so that they don't get optimized away. */
  int i;
  i = class_param.Aptr_a (&g_A);
  i = class_param.Aptr_x (&g_A);
  i = class_param.Aref_a (g_A);
  i = class_param.Aref_x (g_A);
  i = class_param.Aval_a (g_A);
  i = class_param.Aval_x (g_A);
}


int
main()
{
#ifdef usestubs
  set_debug_traps();
  breakpoint();
#endif
  dummy();
  inheritance1 ();
  inheritance3 ();
  enums1 ();
  register_class ();

  /* FIXME: pmi gets optimized out.  Need to do some more computation with
     it or something.  (No one notices, because the test is xfail'd anyway,
     but that probably won't always be true...).  */
  int Foo::* pmi = &Foo::y;

  /* Make sure the AIX linker doesn't remove the variable.  */
  v_tagless.one = 5;

  use_methods ();

  return foo.*pmi;
}

/* Create an instance for some classes, otherwise they get optimized away.  */

default_public_struct default_public_s;
explicit_public_struct explicit_public_s;
protected_struct protected_s;
private_struct private_s;
mixed_protection_struct mixed_protection_s;
public_class public_c;
protected_class protected_c;
default_private_class default_private_c;
explicit_private_class explicit_private_c;
mixed_protection_class mixed_protection_c;