old-cross-binutils/gdb/testsuite/gdb.base/callfuncs.c

/* Support program for testing gdb's ability to call functions
   in the inferior, pass appropriate arguments to those functions,
   and get the returned result. */

#ifdef __STDC__
#define PARAMS(paramlist) paramlist
#else
#define PARAMS(paramlist) ()
#endif

char char_val1 = 'a';
char char_val2 = 'b';

short short_val1 = 10;
short short_val2 = -23;

int int_val1 = 87;
int int_val2 = -26;

long long_val1 = 789;
long long_val2 = -321;

float float_val1 = 3.14159;
float float_val2 = -2.3765;

double double_val1 = 45.654;
double double_val2 = -67.66;

#define DELTA (0.001)

char *string_val1 = "string 1";
char *string_val2 = "string 2";

char char_array_val1[] = "carray 1";
char char_array_val2[] = "carray 2";

struct struct1 {
  int x;
  long y;
} struct_val1 = { 76, 51 };

/* Some functions that can be passed as arguments to other test
   functions, or called directly. */

int add (a, b)
int a, b;
{
  return (a + b);
}

int doubleit (a)
int a;
{
  return (a + a);
}

int (*func_val1) PARAMS((int,int)) = add;
int (*func_val2) PARAMS((int)) = doubleit;

/* An enumeration and functions that test for specific values. */

enum enumtype { enumval1, enumval2, enumval3 };
enum enumtype enum_val1 = enumval1;
enum enumtype enum_val2 = enumval2;
enum enumtype enum_val3 = enumval3;

t_enum_value1 (enum_arg)
enum enumtype enum_arg;
{
  return (enum_arg == enum_val1);
}

t_enum_value2 (enum_arg)
enum enumtype enum_arg;
{
  return (enum_arg == enum_val2);
}

t_enum_value3 (enum_arg)
enum enumtype enum_arg;
{
  return (enum_arg == enum_val3);
}

/* A function that takes a vector of integers (along with an explicit
   count) and returns their sum. */

int sum_args (argc, argv)
int argc;
int argv[];
{
  int sumval = 0;
  int idx;

  for (idx = 0; idx < argc; idx++)
    {
      sumval += argv[idx];
    }
  return (sumval);
}

/* Test that calling functions works if there are a lot of arguments.  */
int
sum10 (i0, i1, i2, i3, i4, i5, i6, i7, i8, i9)
     int i0, i1, i2, i3, i4, i5, i6, i7, i8, i9;
{
  return i0 + i1 + i2 + i3 + i4 + i5 + i6 + i7 + i8 + i9;
}

/* Gotta have a main to be able to generate a linked, runnable
   executable, and also provide a useful place to set a breakpoint. */

main ()
{
  malloc(1);
}

/* Functions that expect specific values to be passed and return 
   either 0 or 1, depending upon whether the values were
   passed incorrectly or correctly, respectively. */

int t_char_values (char_arg1, char_arg2)
char char_arg1, char_arg2;
{
  return ((char_arg1 == char_val1) && (char_arg2 == char_val2));
}

int t_short_values (short_arg1, short_arg2)
short short_arg1, short_arg2;
{
  return ((short_arg1 == short_val1) && (short_arg2 == short_val2));
}

int t_int_values (int_arg1, int_arg2)
int int_arg1, int_arg2;
{
  return ((int_arg1 == int_val1) && (int_arg2 == int_val2));
}

int t_long_values (long_arg1, long_arg2)
long long_arg1, long_arg2;
{
  return ((long_arg1 == long_val1) && (long_arg2 == long_val2));
}

int t_float_values (float_arg1, float_arg2)
float float_arg1, float_arg2;
{
  return (((float_arg1 - float_val1) < DELTA) &&
	  ((float_arg2 - float_val2) < DELTA));
}

int t_double_values (double_arg1, double_arg2)
double double_arg1, double_arg2;
{
  return (((double_arg1 - double_val1) < DELTA) &&
	  ((double_arg2 - double_val2) < DELTA));
}

int t_string_values (string_arg1, string_arg2)
char *string_arg1, *string_arg2;
{
  return (!strcmp (string_arg1, string_val1) &&
	  !strcmp (string_arg2, string_val2));
}

int t_char_array_values (char_array_arg1, char_array_arg2)
char char_array_arg1[], char_array_arg2[];
{
  return (!strcmp (char_array_arg1, char_array_val1) &&
	  !strcmp (char_array_arg2, char_array_val2));
}


/* This used to simply compare the function pointer arguments with
   known values for func_val1 and func_val2.  Doing so is valid ANSI
   code, but on some machines (RS6000, HPPA, others?) it may fail when
   called directly by GDB.

   In a nutshell, it's not possible for GDB to determine when the address
   of a function or the address of the function's stub/trampoline should
   be passed.

   So, to avoid GDB lossage in the common case, we perform calls through the
   various function pointers and compare the return values.  For the HPPA
   at least, this allows the common case to work.

   If one wants to try something more complicated, pass the address of
   a function accepting a "double" as one of its first 4 arguments.  Call
   that function indirectly through the function pointer.  This would fail
   on the HPPA.  */

int t_func_values (func_arg1, func_arg2)
int (*func_arg1) PARAMS ((int, int));
int (*func_arg2) PARAMS ((int));
{
  return ((*func_arg1) (5,5)  == (*func_val1) (5,5)
          && (*func_arg2) (6) == (*func_val2) (6));
}

int t_call_add (func_arg1, a, b)
int (*func_arg1) PARAMS ((int, int));
int a, b;
{
  return ((*func_arg1)(a, b));
}