128 lines
3.6 KiB
C
128 lines
3.6 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2008-2012 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* Test gdb's "return" command in reverse. */
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int void_test = 0;
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int main_test = 0;
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char char_returnval = '1';
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short short_returnval = 1;
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int int_returnval = 1;
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long long_returnval = 1;
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long long long_long_returnval = 1;
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float float_returnval = 1;
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double double_returnval = 1;
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union {
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char char_testval;
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short short_testval;
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int int_testval;
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long long_testval;
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long long long_long_testval;
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float float_testval;
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double double_testval;
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char ffff[80];
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} testval;
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void void_func ()
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{
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void_test = 1; /* VOID FUNC */
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}
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char char_func ()
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{
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return char_returnval; /* CHAR FUNC */
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}
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short short_func ()
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{
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return short_returnval; /* SHORT FUNC */
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}
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int int_func ()
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{
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return int_returnval; /* INT FUNC */
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}
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long long_func ()
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{
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return long_returnval; /* LONG FUNC */
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}
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long long long_long_func ()
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{
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return long_long_returnval; /* LONG LONG FUNC */
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}
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float float_func ()
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{
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return float_returnval; /* FLOAT FUNC */
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}
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double double_func ()
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{
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return double_returnval; /* DOUBLE FUNC */
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}
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int main (int argc, char **argv)
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{
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char char_resultval;
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short short_resultval;
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int int_resultval;
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long long_resultval;
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long long long_long_resultval;
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float float_resultval;
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double double_resultval;
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int i;
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/* A "test load" that will insure that the function really returns
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a ${type} (as opposed to just a truncated or part of a ${type}). */
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for (i = 0; i < sizeof (testval.ffff); i++)
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testval.ffff[i] = 0xff;
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void_func (); /* call to void_func */
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char_resultval = char_func (); /* void_checkpoint */
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short_resultval = short_func (); /* char_checkpoint */
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int_resultval = int_func (); /* short_checkpoint */
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long_resultval = long_func (); /* int_checkpoint */
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long_long_resultval = long_long_func (); /* long_checkpoint */
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/* On machines using IEEE floating point, the test pattern of all
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1-bits established above turns out to be a floating-point NaN
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("Not a Number"). According to the IEEE rules, NaN's aren't even
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equal to themselves. This can lead to stupid conversations with
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GDB like:
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(gdb) p testval.float_testval == testval.float_testval
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$7 = 0
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(gdb)
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This is the correct answer, but it's not the sort of thing
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return2.exp wants to see. So to make things work the way they
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ought, we'll set aside the `union' cleverness and initialize the
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test values explicitly here. These values have interesting bits
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throughout the value, so we'll still detect truncated values. */
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testval.float_testval = 2.7182818284590452354;/* long_long_checkpoint */
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float_resultval = float_func ();
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testval.double_testval = 3.14159265358979323846; /* float_checkpoint */
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double_resultval = double_func ();
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main_test = 1; /* double_checkpoint */
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return 0;
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} /* end of main */
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