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/* This testcase is part of GDB, the GNU debugger.
Copyright 2013-2020 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/>. */
/* Note: 'volatile' is used to make sure the compiler doesn't fold /
optimize out the arithmetic that uses the variables. */
static int
func1 (int a, int b)
{
volatile int r = a * b;
r += (a | b);
r += (a - b);
return r;
}
int
main(void)
{
volatile int a = 0;
volatile int b = 1;
volatile int c = 2;
volatile int d = 3;
volatile int e = 4;
volatile double d1 = 1.0;
volatile double d2 = 2.0;
/* A macro that expands to a single source line that compiles to a
number of instructions, with no branches. */
#define LINE_WITH_MULTIPLE_INSTRUCTIONS \
do \
{ \
a = b + c + d * e - a; \
} while (0)
LINE_WITH_MULTIPLE_INSTRUCTIONS; /* location 1 */
/* A line of source code that compiles to a function call (jump or
branch), surrounded by instructions before and after. IOW, this
will generate approximately the following pseudo-instructions:
addr1:
insn1;
insn2;
...
call func1;
...
insn3;
addr2:
insn4;
*/
e = 10 + func1 (a + b, c * d); /* location 2 */
e = 10 + func1 (a + b, c * d);
/* Generate a single source line that includes a short loop. */
#define LINE_WITH_LOOP \
do \
{ \
for (a = 0, e = 0; a < 15; a++) \
e += a; \
} while (0)
LINE_WITH_LOOP;
LINE_WITH_LOOP;
/* Generate a single source line that includes a time-consuming
loop. GDB breaks the loop early by clearing variable 'c'. */
#define LINE_WITH_TIME_CONSUMING_LOOP \
do \
{ \
for (c = 1, a = 0; a < 65535 && c; a++) \
for (b = 0; b < 65535 && c; b++) \
{ \
d1 = d2 * a / b; \
d2 = d1 * a; \
} \
} while (0)
LINE_WITH_TIME_CONSUMING_LOOP;
/* Some multi-instruction lines for software watchpoint tests. */
LINE_WITH_MULTIPLE_INSTRUCTIONS;
LINE_WITH_MULTIPLE_INSTRUCTIONS; /* soft-watch */
LINE_WITH_MULTIPLE_INSTRUCTIONS;
return 0;
}
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