gdb/testsuite/gdb.base/bp-permanent.c

   1 /* Copyright (C) 2014-2022 Free Software Foundation, Inc.
   2
   3    This file is part of GDB.
   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 #include <string.h>
  19 #ifdef SIGNALS
  20 #include <signal.h>
  21 #include <unistd.h>
  22 #endif
  23
  24 /* NOP instruction: must have the same size as the breakpoint
  25    instruction.  */
  26
  27 #if defined(__s390__) || defined(__s390x__)
  28 #define NOP asm("nopr 0")
  29 #elif defined(__or1k__)
  30 #define NOP asm("l.nop")
  31 #else
  32 #define NOP asm("nop")
  33 #endif
  34
  35 /* Buffer holding the breakpoint instruction.  */
  36 unsigned char buffer[16];
  37
  38 volatile unsigned char *addr_bp;
  39 volatile unsigned char *addr_after_bp;
  40 int counter = 0;
  41
  42 void
  43 test (void)
  44 {
  45   NOP;
  46   NOP;
  47   NOP;
  48   NOP; /* write permanent bp here */
  49   NOP; /* after permanent bp */
  50   NOP;
  51   NOP;
  52   NOP;
  53   NOP;
  54   NOP;
  55
  56   counter++;
  57 }
  58
  59 void
  60 setup (void)
  61 {
  62   memcpy (buffer, (void *) addr_bp, addr_after_bp - addr_bp);
  63 }
  64
  65 void
  66 test_basics (void)
  67 {
  68   test (); /* for SIGTRAP */
  69   test (); /* for breakpoint once */
  70   test (); /* for breakpoint twice */
  71   test (); /* for disabled bp SIGTRAP */
  72   test (); /* for breakpoint thrice */
  73 }
  74
  75 void
  76 test_next (void)
  77 {
  78   test (); /* for next */
  79   counter = 0; /* after next */
  80 }
  81
  82 #ifdef SIGNALS
  83
  84 static void
  85 test_signal_handler (int sig)
  86 {
  87 }
  88
  89 void
  90 test_signal_with_handler (void)
  91 {
  92   signal (SIGUSR1, test_signal_handler);
  93   test ();
  94 }
  95
  96 void
  97 test_signal_no_handler (void)
  98 {
  99   signal (SIGUSR1, SIG_IGN);
 100   test ();
 101 }
 102
 103 static void
 104 test_signal_nested_handler ()
 105 {
 106   test ();
 107 }
 108
 109 void
 110 test_signal_nested_done (void)
 111 {
 112 }
 113
 114 void
 115 test_signal_nested (void)
 116 {
 117   counter = 0;
 118   signal (SIGALRM, test_signal_nested_handler);
 119   alarm (1);
 120   test ();
 121   test_signal_nested_done ();
 122 }
 123
 124 #endif
 125
 126 int
 127 main (void)
 128 {
 129   setup ();
 130   test_basics ();
 131   test_next ();
 132 #ifdef SIGNALS
 133   test_signal_nested ();
 134   test_signal_with_handler ();
 135   test_signal_no_handler ();
 136 #endif
 137   return 0;
 138 }