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105 lines
2.7 KiB
C
105 lines
2.7 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2013-2015 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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/* Note: 'volatile' is used to make sure the compiler doesn't fold /
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optimize out the arithmetic that uses the variables. */
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static int
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func1 (int a, int b)
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{
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volatile int r = a * b;
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r += (a | b);
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r += (a - b);
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return r;
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}
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int
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main(void)
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{
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volatile int a = 0;
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volatile int b = 1;
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volatile int c = 2;
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volatile int d = 3;
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volatile int e = 4;
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volatile double d1 = 1.0;
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volatile double d2 = 2.0;
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/* A macro that expands to a single source line that compiles to a
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number of instructions, with no branches. */
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#define LINE_WITH_MULTIPLE_INSTRUCTIONS \
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do \
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{ \
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a = b + c + d * e - a; \
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} while (0)
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LINE_WITH_MULTIPLE_INSTRUCTIONS; /* location 1 */
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/* A line of source code that compiles to a function call (jump or
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branch), surrounded by instructions before and after. IOW, this
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will generate approximately the following pseudo-instructions:
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addr1:
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insn1;
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insn2;
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...
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call func1;
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...
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insn3;
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addr2:
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insn4;
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*/
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e = 10 + func1 (a + b, c * d); /* location 2 */
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e = 10 + func1 (a + b, c * d);
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/* Generate a single source line that includes a short loop. */
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#define LINE_WITH_LOOP \
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do \
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{ \
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for (a = 0, e = 0; a < 15; a++) \
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e += a; \
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} while (0)
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LINE_WITH_LOOP;
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LINE_WITH_LOOP;
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/* Generate a single source line that includes a time-consuming
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loop. GDB breaks the loop early by clearing variable 'c'. */
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#define LINE_WITH_TIME_CONSUMING_LOOP \
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do \
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{ \
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for (c = 1, a = 0; a < 65535 && c; a++) \
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for (b = 0; b < 65535 && c; b++) \
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{ \
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d1 = d2 * a / b; \
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d2 = d1 * a; \
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} \
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} while (0)
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LINE_WITH_TIME_CONSUMING_LOOP;
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/* Some multi-instruction lines for software watchpoint tests. */
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LINE_WITH_MULTIPLE_INSTRUCTIONS;
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LINE_WITH_MULTIPLE_INSTRUCTIONS; /* soft-watch */
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LINE_WITH_MULTIPLE_INSTRUCTIONS;
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return 0;
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}
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