1 /* This testcase is part of GDB, the GNU debugger. 2 3 Copyright 2013-2014 Free Software Foundation, Inc. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3 of the License, or 8 (at your option) any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 17 18 /* Note: 'volatile' is used to make sure the compiler doesn't fold / 19 optimize out the arithmetic that uses the variables. */ 20 21 static int 22 func1 (int a, int b) 23 { 24 volatile int r = a * b; 25 26 r += (a | b); 27 r += (a - b); 28 29 return r; 30 } 31 32 int 33 main(void) 34 { 35 volatile int a = 0; 36 volatile int b = 1; 37 volatile int c = 2; 38 volatile int d = 3; 39 volatile int e = 4; 40 volatile double d1 = 1.0; 41 volatile double d2 = 2.0; 42 43 /* A macro that expands to a single source line that compiles to a 44 number of instructions, with no branches. */ 45 #define LINE_WITH_MULTIPLE_INSTRUCTIONS \ 46 do \ 47 { \ 48 a = b + c + d * e - a; \ 49 } while (0) 50 51 LINE_WITH_MULTIPLE_INSTRUCTIONS; /* location 1 */ 52 53 /* A line of source code that compiles to a function call (jump or 54 branch), surrounded by instructions before and after. IOW, this 55 will generate approximately the following pseudo-instructions: 56 57 addr1: 58 insn1; 59 insn2; 60 ... 61 call func1; 62 ... 63 insn3; 64 addr2: 65 insn4; 66 */ 67 e = 10 + func1 (a + b, c * d); /* location 2 */ 68 69 e = 10 + func1 (a + b, c * d); 70 71 /* Generate a single source line that includes a short loop. */ 72 #define LINE_WITH_LOOP \ 73 do \ 74 { \ 75 for (a = 0, e = 0; a < 15; a++) \ 76 e += a; \ 77 } while (0) 78 79 LINE_WITH_LOOP; 80 81 LINE_WITH_LOOP; 82 83 /* Generate a single source line that includes a time-consuming 84 loop. GDB breaks the loop early by clearing variable 'c'. */ 85 #define LINE_WITH_TIME_CONSUMING_LOOP \ 86 do \ 87 { \ 88 for (c = 1, a = 0; a < 65535 && c; a++) \ 89 for (b = 0; b < 65535 && c; b++) \ 90 { \ 91 d1 = d2 * a / b; \ 92 d2 = d1 * a; \ 93 } \ 94 } while (0) 95 96 LINE_WITH_TIME_CONSUMING_LOOP; 97 98 /* Some multi-instruction lines for software watchpoint tests. */ 99 LINE_WITH_MULTIPLE_INSTRUCTIONS; 100 LINE_WITH_MULTIPLE_INSTRUCTIONS; /* soft-watch */ 101 LINE_WITH_MULTIPLE_INSTRUCTIONS; 102 103 return 0; 104 } 105