1 /* Copyright 1994-2023 Free Software Foundation, Inc. 2 3 This program is free software; you can redistribute it and/or modify 4 it under the terms of the GNU General Public License as published by 5 the Free Software Foundation; either version 3 of the License, or 6 (at your option) any later version. 7 8 This program is distributed in the hope that it will be useful, 9 but WITHOUT ANY WARRANTY; without even the implied warranty of 10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 GNU General Public License for more details. 12 13 You should have received a copy of the GNU General Public License 14 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 15 16 #include <stdio.h> 17 #include <stdlib.h> 18 19 /* 20 * The following functions do nothing useful. They are included simply 21 * as places to try setting breakpoints at. They are explicitly 22 * "one-line functions" to verify that this case works (some versions 23 * of gcc have or have had problems with this). 24 */ 25 26 int marker1 (void) { return (0); } 27 int marker2 (int a) { return (1); } /* set breakpoint 8 here */ 28 void marker3 (char *a, char *b) {} 29 void marker4 (long d) {} /* set breakpoint 14 here */ 30 31 /* 32 * This simple classical example of recursion is useful for 33 * testing stack backtraces and such. 34 */ 35 36 int factorial(int); 37 38 int 39 main (int argc, char **argv, char **envp) 40 { 41 if (argc == 12345) { /* an unlikely value < 2^16, in case uninited */ /* set breakpoint 6 here */ 42 fprintf (stderr, "usage: factorial <number>\n"); 43 return 1; 44 } 45 printf ("%d\n", factorial (atoi ("6"))); /* set breakpoint 1 here */ 46 /* set breakpoint 12 here */ 47 marker1 (); /* set breakpoint 11 here */ 48 marker2 (43); 49 marker3 ("stack", "trace"); 50 marker4 (177601976L); 51 argc = (argc == 12345); /* This is silly, but we can step off of it */ /* set breakpoint 2 here */ 52 return argc; /* set breakpoint 10 here */ 53 } 54 55 int factorial (int value) 56 { 57 if (value > 1) { /* set breakpoint 7 here */ 58 value *= factorial (value - 1); 59 } 60 return (value); 61 } 62 63 int multi_line_if_conditional (int a, int b, int c) 64 { 65 if (a /* set breakpoint 3 here */ 66 && b 67 && c) 68 return 0; 69 else 70 return 1; 71 } 72 73 int multi_line_while_conditional (int a, int b, int c) 74 { 75 while (a /* set breakpoint 4 here */ 76 && b 77 && c) 78 { 79 a--, b--, c--; 80 } 81 return 0; 82 } 83