1 /* libunwind - a platform-independent unwind library 2 Copyright (C) 2004 Hewlett-Packard Co 3 Contributed by David Mosberger-Tang <davidm (at) hpl.hp.com> 4 5 This file is part of libunwind. 6 7 Permission is hereby granted, free of charge, to any person obtaining 8 a copy of this software and associated documentation files (the 9 "Software"), to deal in the Software without restriction, including 10 without limitation the rights to use, copy, modify, merge, publish, 11 distribute, sublicense, and/or sell copies of the Software, and to 12 permit persons to whom the Software is furnished to do so, subject to 13 the following conditions: 14 15 The above copyright notice and this permission notice shall be 16 included in all copies or substantial portions of the Software. 17 18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 21 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 25 26 #include "compiler.h" 27 28 #include <signal.h> 29 #include <stdint.h> 30 #include <stdio.h> 31 #include <stdlib.h> 32 #include <unistd.h> 33 34 #include <sys/types.h> 35 36 pid_t self; 37 int global[64]; 38 39 int 40 func (int arg) 41 { 42 int sum = 0, i, max, arr[1024]; 43 44 if (arg == 0) 45 { 46 sum = global[2]; 47 sum += sum + sum * getppid (); 48 return sum; 49 } 50 else 51 { 52 max = arg; 53 if (max >= 64) 54 max = 64; 55 56 for (i = 0; i < max; ++i) 57 arr[i] = func (arg - 1); 58 59 for (i = 0; i < max; ++i) 60 if (arr[i] > 16) 61 sum += arr[i]; 62 else 63 sum -= arr[i]; 64 } 65 return sum; 66 } 67 68 int 69 bar (int v) 70 { 71 extern long f (long); 72 int arr[1] = { v }; 73 uintptr_t r; 74 75 /* This is a vain attempt to use up lots of registers to force 76 the frame-chain info to be saved on the memory stack on ia64. 77 It happens to work with gcc v3.3.4 and gcc v3.4.1 but perhaps 78 not with any other compiler. */ 79 r = (uintptr_t) malloc(f (arr[0]) 80 + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) 81 + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) 82 + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) 83 + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) 84 + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) 85 + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) 86 + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) 87 + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) 88 + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) 89 + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) 90 + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) 91 + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) 92 + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) 93 + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) 94 + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) 95 + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) 96 + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + f (v)) 97 )))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))) 98 ))))))))))))))))))))))))))))))))))))))))))))))))))))))); 99 if (r < 2) 100 v = r; 101 102 kill (self, SIGUSR1); /* tell test-ptrace to start single-stepping */ 103 v = func (v); 104 kill (self, SIGUSR2); /* tell test-ptrace to stop single-stepping */ 105 return v; 106 } 107 108 int 109 main (int argc, char **argv UNUSED) 110 { 111 int val = argc; 112 113 signal (SIGUSR1, SIG_IGN); 114 signal (SIGUSR2, SIG_IGN); 115 116 self = getpid (); 117 118 printf ("sum = %d\n", bar (val)); 119 return 0; 120 } 121
