testsuite/gdb.base/funcargs.c

/*  Test passing of arguments to functions.  Use various sorts of arguments,
    including basic types, pointers to those types, structures, lots of
    args, etc, in various combinations. */

/* AIX requires this to be the first thing in the file.  */
#ifdef __GNUC__
#  define alloca __builtin_alloca
#  define HAVE_STACK_ALLOCA 1
#else /* not __GNUC__ */
#  ifdef _AIX
     #pragma alloca
#    define HAVE_STACK_ALLOCA 1
#  else /* Not AIX */
#    ifdef sparc
#      include <alloca.h>
#      define HAVE_STACK_ALLOCA 1
#      ifdef __STDC__
         void *alloca ();
#      else
         char *alloca ();
#      endif /* __STDC__ */
#    endif /* sparc */
#  endif /* Not AIX */
#endif /* not __GNUC__ */

char c = 'a';
char *cp = &c;

unsigned char uc = 'b';
unsigned char *ucp = &uc;

short s = 1;
short *sp = &s;

unsigned short us = 6;
unsigned short *usp = &us;

int i = 2;
int *ip = &i;

unsigned int ui = 7;
unsigned int *uip = &ui;

long l = 3;
long *lp = &l;

unsigned long ul = 8;
unsigned long *ulp = &ul;

float f = 4.0;
float *fp = &f;

double d = 5.0;
double *dp = &d;

#ifdef TEST_COMPLEX
float _Complex fc = 1.0F + 2.0iF;
double _Complex dc = 3.0 + 4.0i;
long double _Complex ldc = 5.0L + 6.0iL;
#endif /* TEST_COMPLEX */

struct stag {
    int s1;
    int s2;
} st = { 101, 102 };
struct stag *stp = &st;

union utag {
    int u1;
    long u2;
} un;
union utag *unp = &un;

char carray[] = {'a', 'n', ' ', 'a', 'r', 'r', 'a', 'y', '\0'};


/* Test various permutations and interleaving of integral arguments */


void call0a (char c, short s, int i, long l)
{
  c = 'a';
  s = 5;
  i = 6;
  l = 7;
}

void call0b (short s, int i, long l, char c)
{
  s = 6; i = 7; l = 8; c = 'j';
}

void call0c (int i, long l, char c, short s)
{
  i = 3; l = 4; c = 'k'; s = 5;
}

void call0d (long l, char c, short s, int i)
{
  l = 7; c = 'z'; s = 8; i = 9;
}

void call0e (char c1, long l, char c2, int i, char c3, short s, char c4, char c5)
{
  c1 = 'a'; l = 5; c2 = 'b'; i = 7; c3 = 'c'; s = 7; c4 = 'f'; c5 = 'g';
}


/* Test various permutations and interleaving of unsigned integral arguments */


void call1a (unsigned char uc, unsigned short us, unsigned int ui, unsigned long ul)
{
  uc = 5; us = 6; ui = 7; ul = 8;
}

void call1b (unsigned short us, unsigned int ui, unsigned long ul, unsigned char uc)
{
  uc = 5; us = 6; ui = 7; ul = 8;
}

void call1c (unsigned int ui, unsigned long ul, unsigned char uc, unsigned short us)
{
  uc = 5; us = 6; ui = 7; ul = 8;
}

void call1d (unsigned long ul, unsigned char uc, unsigned short us, unsigned int ui)
{
  uc = 5; us = 6; ui = 7; ul = 8;
}

void call1e (unsigned char uc1, unsigned long ul, unsigned char uc2, unsigned int ui, unsigned char uc3, unsigned short us, unsigned char uc4, unsigned char uc5)
{
  uc1 = 5; ul = 7; uc2 = 8; ui = 9; uc3 = 10; us = 11; uc4 = 12; uc5 = 55;
}

/* Test various permutations and interleaving of integral arguments with
   floating point arguments. */


void call2a (char c, float f1, short s, double d1, int i, float f2, long l, double d2)
{
  c = 'a'; f1 = 0.0; s = 5; d1 = 0.0; i = 6; f2 = 0.1; l = 7; d2 = 0.2;
}

void call2b (float f1, short s, double d1, int i, float f2, long l, double d2, char c)
{
  c = 'a'; f1 = 0.0; s = 5; d1 = 0.0; i = 6; f2 = 0.1; l = 7; d2 = 0.2;
}

void call2c (short s, double d1, int i, float f2, long l, double d2, char c, float f1)
{
  c = 'a'; f1 = 0.0; s = 5; d1 = 0.0; i = 6; f2 = 0.1; l = 7; d2 = 0.2;
}

void call2d (double d1, int i, float f2, long l, double d2, char c, float f1, short s)
{
  c = 'a'; f1 = 0.0; s = 5; d1 = 0.0; i = 6; f2 = 0.1; l = 7; d2 = 0.2;
}

void call2e (int i, float f2, long l, double d2, char c, float f1, short s, double d1)
{
  c = 'a'; f1 = 0.0; s = 5; d1 = 0.0; i = 6; f2 = 0.1; l = 7; d2 = 0.2;
}

void call2f (float f2, long l, double d2, char c, float f1, short s, double d1, int i)
{
  c = 'a'; f1 = 0.0; s = 5; d1 = 0.0; i = 6; f2 = 0.1; l = 7; d2 = 0.2;
}

void call2g (long l, double d2, char c, float f1, short s, double d1, int i, float f2)
{
  c = 'a'; f1 = 0.0; s = 5; d1 = 0.0; i = 6; f2 = 0.1; l = 7; d2 = 0.2;
}

void call2h (double d2, char c, float f1, short s, double d1, int i, float f2, long l)
{
  c = 'a'; f1 = 0.0; s = 5; d1 = 0.0; i = 6; f2 = 0.1; l = 7; d2 = 0.2;
}

void call2i (char c1, float f1, char c2, char c3, double d1, char c4, char c5, char c6, float f2, short s, char c7, double d2)
{
  c1 = 'a'; f1 = 0.0; c2 = 5; d1 = 0.0; c3 = 6; f2 = 0.1; c4 = 7; d2 = 0.2;
  c5 = 's'; c6 = 'f'; c7 = 'z'; s = 77;
}


/* Test pointers to various integral and floating types. */


void call3a (char *cp, short *sp, int *ip, long *lp)
{
  cp = 0; sp = 0; ip = 0; lp = 0;
}

void call3b (unsigned char *ucp, unsigned short *usp, unsigned int *uip, unsigned long *ulp)
{
  ucp = 0; usp = 0; uip = 0; ulp = 0;
}

void call3c (float *fp, double *dp)
{
  fp = 0; dp = 0;
}


#ifdef TEST_COMPLEX

/* Test various _Complex type args.  */

void callca (float _Complex f1, float _Complex f2, float _Complex f3)
{

}

void callcb (double _Complex d1, double _Complex d2, double _Complex d3)
{

}

void callcc (long double _Complex ld1, long double _Complex ld2, long double _Complex ld3)
{

}

void callcd (float _Complex fc1, double _Complex dc1, long double _Complex ldc1)
{
}

void callce (double _Complex dc1, long double _Complex ldc1, float _Complex fc1)
{
}

void callcf (long double _Complex ldc1, float _Complex fc1, double _Complex dc1)
{
}


/* Test passing _Complex type and integral.  */
void callc1a (char c, short s, int i, unsigned int ui, long l,
	      float _Complex fc1, double _Complex dc1,
	      long double _Complex ldc1)
{}

void callc1b (long double _Complex ldc1, char c, short s, int i,
	      float _Complex fc1, unsigned int ui, long l,  double _Complex dc1)
{}


void callc2a (char c, short s, int i, unsigned int ui, long l, float f,
	      double d, float _Complex fc1, double _Complex dc1,
	      long double _Complex ldc1)
{}

void callc2b (float _Complex fc1, char c, short s, int i, unsigned int ui,
	      long double _Complex ldc1, long l, float f, double d,
	      double _Complex dc1)
{}


#endif /* TEST_COMPLEX */

/* Test passing structures and unions by reference. */


void call4a (struct stag *stp)
{stp = 0;}

void call4b (union utag *unp)
{
  unp = 0;
}


/* Test passing structures and unions by value. */


void call5a (struct stag st)
{st.s1 = 5;}

void call5b (union utag un)
{un.u1 = 7;}


/* Test shuffling of args */


void call6k ()
{
}

void call6j (unsigned long ul)
{
  ul = ul;
    call6k ();
}

void call6i (unsigned int ui, unsigned long ul)
{
  ui = ui;
    call6j (ul);
}

void call6h (unsigned short us, unsigned int ui, unsigned long ul)
{
  us = us;
    call6i (ui, ul);
}

void call6g (unsigned char uc, unsigned short us, unsigned int ui, unsigned long ul)
{
  uc = uc;
    call6h (us, ui, ul);
}

void call6f (double d, unsigned char uc, unsigned short us, unsigned int ui, unsigned long ul)
{
  d = d;
    call6g (uc, us, ui, ul);
}

void call6e (float f, double d, unsigned char uc, unsigned short us, unsigned int ui, unsigned long ul)
{
  f = f;
    call6f (d, uc, us, ui, ul);
}

void call6d (long l, float f, double d, unsigned char uc, unsigned short us, unsigned int ui, unsigned long ul)
{
  l = l;
    call6e (f, d, uc, us, ui, ul);
}

void call6c (int i, long l, float f, double d, unsigned char uc, unsigned short us, unsigned int ui, unsigned long ul)
{
  i = i;
    call6d (l, f, d, uc, us, ui, ul);
}

void call6b (short s, int i, long l, float f, double d, unsigned char uc, unsigned short us, unsigned int ui, unsigned long ul)
{
  s = s;
    call6c (i, l, f, d, uc, us, ui, ul);
}

void call6a (char c, short s, int i, long l, float f, double d, unsigned char uc, unsigned short us, unsigned int ui, unsigned long ul)
{
  c = c;
    call6b (s, i, l, f, d, uc, us, ui, ul);
}

/*  Test shuffling of args, round robin */


void call7k (char c, int i, short s, long l, float f, unsigned char uc, double d, unsigned short us, unsigned long ul, unsigned int ui)
{
  c = 'a'; i = 7; s = 8; l = 7; f = 0.3; uc = 44; d = 0.44; us = 77;
  ul = 43; ui = 33;
}

void call7j (unsigned int ui, char c, int i, short s, long l, float f, unsigned char uc, double d, unsigned short us, unsigned long ul)
{
    call7k (c, i, s, l, f, uc, d, us, ul, ui);
}

void call7i (unsigned long ul, unsigned int ui, char c, int i, short s, long l, float f, unsigned char uc, double d, unsigned short us)
{
    call7j (ui, c, i, s, l, f, uc, d, us, ul);
}

void call7h (unsigned short us, unsigned long ul, unsigned int ui, char c, int i, short s, long l, float f, unsigned char uc, double d)
{
    call7i (ul, ui, c, i, s, l, f, uc, d, us);
}

void call7g (double d, unsigned short us, unsigned long ul, unsigned int ui, char c, int i, short s, long l, float f, unsigned char uc)
{
    call7h (us, ul, ui, c, i, s, l, f, uc, d);
}

void call7f (unsigned char uc, double d, unsigned short us, unsigned long ul, unsigned int ui, char c, int i, short s, long l, float f)
{
    call7g (d, us, ul, ui, c, i, s, l, f, uc);
}

void call7e (float f, unsigned char uc, double d, unsigned short us, unsigned long ul, unsigned int ui, char c, int i, short s, long l)
{
    call7f (uc, d, us, ul, ui, c, i, s, l, f);
}

void call7d (long l, float f, unsigned char uc, double d, unsigned short us, unsigned long ul, unsigned int ui, char c, int i, short s)
{
    call7e (f, uc, d, us, ul, ui, c, i, s, l);
}

void call7c (short s, long l, float f, unsigned char uc, double d, unsigned short us, unsigned long ul, unsigned int ui, char c, int i)
{
    call7d (l, f, uc, d, us, ul, ui, c, i, s);
}

void call7b (int i, short s, long l, float f, unsigned char uc, double d, unsigned short us, unsigned long ul, unsigned int ui, char c)
{
    call7c (s, l, f, uc, d, us, ul, ui, c, i);
}

void call7a (char c, int i, short s, long l, float f, unsigned char uc, double d, unsigned short us, unsigned long ul, unsigned int ui)
{
    call7b (i, s, l, f, uc, d, us, ul, ui, c);
}


/*  Test printing of structures passed as arguments to recursive functions. */


typedef struct s
{
  short s;
  int i;
  long l;
} SVAL;

void hitbottom ()
{
}

void use_a (SVAL a)
{
  /* Trick the compiler into thinking A is important.  */
  volatile SVAL dummy = a;
}

void recurse (SVAL a, int depth)
{
  a.s = a.i = a.l = --depth;
  if (depth == 0)
    hitbottom ();
  else
    recurse (a, depth);

  /* Ensure A is not discarded after the above calls.  */
  use_a (a);
}

void test_struct_args ()
{
  SVAL s; s.s = 5; s.i = 5; s.l = 5;

  recurse (s, 5);
}

/* On various machines (pa, 29k, and rs/6000, at least), a function which
   calls alloca may do things differently with respect to frames.  So give
   it a try.  */

void localvars_after_alloca (char c, short s, int i, long l)
{
#ifdef HAVE_STACK_ALLOCA
  /* No need to use the alloca.c alloca-on-top-of-malloc; it doesn't
     test what we are looking for, so if we don't have an alloca which
     allocates on the stack, just don't bother to call alloca at all.  */

  char *z = alloca (s + 50);
#endif
  c = 'a';
  s = 5;
  i = 6;
  l = 7;
}

void call_after_alloca_subr (char c, short s, int i, long l, unsigned char uc, unsigned short us, unsigned int ui, unsigned long ul)
{
  c = 'a';
  i = 7; s = 8; l = 7; uc = 44; us = 77;
  ul = 43; ui = 33;
}

void call_after_alloca (char c, short s, int i, long l)
{
#ifdef HAVE_STACK_ALLOCA
  /* No need to use the alloca.c alloca-on-top-of-malloc; it doesn't
     test what we are looking for, so if we don't have an alloca which
     allocates on the stack, just don't bother to call alloca at all.  */

  char *z = alloca (s + 50);
#endif
  call_after_alloca_subr (c, s, i, l, 'b', 11, 12, (unsigned long)13);
}


/* The point behind this test is the PA will call this indirectly
   through dyncall.  Unlike the indirect calls to call0a, this test
   will require a trampoline between dyncall and this function on the
   call path, then another trampoline on between this function and main
   on the return path.  */
double call_with_trampolines (double d1)
{
  return d1;
} /* End of call_with_trampolines, this comment is needed by funcargs.exp */

/* Dummy functions which the testsuite can use to run to, etc.  */

void
marker_indirect_call () {}

void
marker_call_with_trampolines () {}

int main ()
{
  void (*pointer_to_call0a) (char, short, int, long) = (void (*)(char, short, int, long))call0a;
  double (*pointer_to_call_with_trampolines) (double) = call_with_trampolines;

  /* Test calling with basic integer types */
  call0a (c, s, i, l);
  call0b (s, i, l, c);
  call0c (i, l, c, s);
  call0d (l, c, s, i);
  call0e (c, l, c, i, c, s, c, c);

  /* Test calling with unsigned integer types */
  call1a (uc, us, ui, ul);
  call1b (us, ui, ul, uc);
  call1c (ui, ul, uc, us);
  call1d (ul, uc, us, ui);
  call1e (uc, ul, uc, ui, uc, us, uc, uc);

  /* Test calling with integral types mixed with floating point types */
  call2a (c, f, s, d, i, f, l, d);
  call2b (f, s, d, i, f, l, d, c);
  call2c (s, d, i, f, l, d, c, f);
  call2d (d, i, f, l, d, c, f, s);
  call2e (i, f, l, d, c, f, s, d);
  call2f (f, l, d, c, f, s, d, i);
  call2g (l, d, c, f, s, d, i, f);
  call2h (d, c, f, s, d, i, f, l);
  call2i (c, f, c, c, d, c, c, c, f, s, c, d);

#ifdef TEST_COMPLEX
  /* Test calling with _Complex types.  */
  callca (fc, fc, fc);
  callcb (dc, dc, dc);
  callcc (ldc, ldc, ldc);
  callcd (fc, dc, ldc);
  callce (dc, ldc, fc);
  callcf (ldc, fc, dc);


  callc1a (c, s, i, ui, l, fc, dc, ldc);
  callc1b (ldc, c, s, i, fc, ui, l, dc);

  callc2a (c, s, i, ui, l, f, d, fc, dc, ldc);
  callc2b (fc, c, s, i, ui, ldc, l, f, d, dc);
#endif /* TEST_COMPLEX */

  /* Test dereferencing pointers to various integral and floating types */

  call3a (cp, sp, ip, lp);
  call3b (ucp, usp, uip, ulp);
  call3c (fp, dp);

  /* Test dereferencing pointers to structs and unions */

  call4a (stp);
  un.u1 = 1;
  call4b (unp);

  /* Test calling with structures and unions. */

  call5a (st);
  un.u1 = 2;
  call5b (un);

  /* Test shuffling of args */

  call6a (c, s, i, l, f, d, uc, us, ui, ul);
  call7a (c, i, s, l, f, uc, d, us, ul, ui);

  /* Test passing structures recursively. */

  test_struct_args ();

  localvars_after_alloca (c, s, i, l);

  call_after_alloca (c, s, i, l);

  /* This is for localvars_in_indirect_call.  */
  marker_indirect_call ();
  /* The comment on the following two lines is used by funcargs.exp,
     don't change it.  */
  (*pointer_to_call0a) (c, s, i, l);	/* First step into call0a.  */
  (*pointer_to_call0a) (c, s, i, l);	/* Second step into call0a.  */
  marker_call_with_trampolines ();
  (*pointer_to_call_with_trampolines) (d); /* Test multiple trampolines.  */
  return 0;
}