1 /* This testcase is part of GDB, the GNU debugger. 2 3 Copyright 2012-2019 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 #if USE_PROBES 19 20 #define _SDT_HAS_SEMAPHORES 21 __extension__ unsigned short test_user_semaphore __attribute__ ((unused)) __attribute__ ((section (".probes"))); 22 #define TEST test_user_semaphore 23 24 __extension__ unsigned short test_two_semaphore __attribute__ ((unused)) __attribute__ ((section (".probes"))); 25 #define TEST2 test_two_semaphore 26 27 __extension__ unsigned short test_m4_semaphore __attribute__ ((unused)) __attribute__ ((section (".probes"))); 28 29 __extension__ unsigned short test_pstr_semaphore __attribute__ ((unused)) __attribute__ ((section (".probes"))); 30 31 __extension__ unsigned short test_ps_semaphore __attribute__ ((unused)) __attribute__ ((section (".probes"))); 32 #else 33 34 #define TEST 1 35 #define TEST2 1 36 37 #endif 38 39 #include <sys/sdt.h> 40 41 /* We only support SystemTap and only the v3 form. */ 42 #if _SDT_NOTE_TYPE != 3 43 #error "not using SystemTap v3 probes" 44 #endif 45 46 struct funcs 47 { 48 int val; 49 50 const char *(*ps) (int); 51 }; 52 53 static void 54 m1 (void) 55 { 56 /* m1 and m2 are equivalent, but because of some compiler 57 optimizations we have to make each of them unique. This is why 58 we have this dummy variable here. */ 59 volatile int dummy = 0; 60 61 if (TEST2) 62 STAP_PROBE1 (test, two, dummy); 63 } 64 65 static void 66 m2 (void) 67 { 68 if (TEST2) 69 STAP_PROBE (test, two); 70 } 71 72 static int 73 f (int x) 74 { 75 if (TEST) 76 STAP_PROBE1 (test, user, x); 77 return x+5; 78 } 79 80 static const char * 81 pstr (int val) 82 { 83 const char *a = "This is a test message."; 84 const char *b = "This is another test message."; 85 86 STAP_PROBE3 (test, ps, a, b, val); 87 88 return val == 0 ? a : b; 89 } 90 91 static void 92 m4 (const struct funcs *fs, int v) 93 { 94 STAP_PROBE3 (test, m4, fs->val, fs->ps (v), v); 95 } 96 97 int 98 main() 99 { 100 struct funcs fs; 101 102 fs.val = 42; 103 fs.ps = pstr; 104 105 f (f (23)); 106 m1 (); 107 m2 (); 108 109 m4 (&fs, 0); 110 m4 (&fs, 1); 111 112 return 0; /* last break here */ 113 } 114