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

   1 /* Copyright (C) 2014-2016 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 #else
  30 #define NOP asm("nop")
  31 #endif
  32
  33 /* Buffer holding the breakpoint instruction.  */
  34 unsigned char buffer[16];
  35
  36 volatile unsigned char *addr_bp;
  37 volatile unsigned char *addr_after_bp;
  38 int counter = 0;
  39
  40 void
  41 test (void)
  42 {
  43   NOP;
  44   NOP;
  45   NOP;
  46   NOP; /* write permanent bp here */
  47   NOP; /* after permanent bp */
  48   NOP;
  49   NOP;
  50   NOP;
  51   NOP;
  52   NOP;
  53
  54   counter++;
  55 }
  56
  57 void
  58 setup (void)
  59 {
  60   memcpy (buffer, (void *) addr_bp, addr_after_bp - addr_bp);
  61 }
  62
  63 void
  64 test_basics (void)
  65 {
  66   test (); /* for SIGTRAP */
  67   test (); /* for breakpoint once */
  68   test (); /* for breakpoint twice */
  69   test (); /* for disabled bp SIGTRAP */
  70   test (); /* for breakpoint thrice */
  71 }
  72
  73 void
  74 test_next (void)
  75 {
  76   test (); /* for next */
  77   counter = 0; /* after next */
  78 }
  79
  80 #ifdef SIGNALS
  81
  82 static void
  83 test_signal_handler (int sig)
  84 {
  85 }
  86
  87 void
  88 test_signal_with_handler (void)
  89 {
  90   signal (SIGUSR1, test_signal_handler);
  91   test ();
  92 }
  93
  94 void
  95 test_signal_no_handler (void)
  96 {
  97   signal (SIGUSR1, SIG_IGN);
  98   test ();
  99 }
 100
 101 static void
 102 test_signal_nested_handler ()
 103 {
 104   test ();
 105 }
 106
 107 void
 108 test_signal_nested_done (void)
 109 {
 110 }
 111
 112 void
 113 test_signal_nested (void)
 114 {
 115   counter = 0;
 116   signal (SIGALRM, test_signal_nested_handler);
 117   alarm (1);
 118   test ();
 119   test_signal_nested_done ();
 120 }
 121
 122 #endif
 123
 124 int
 125 main (void)
 126 {
 127   setup ();
 128   test_basics ();
 129   test_next ();
 130 #ifdef SIGNALS
 131   test_signal_nested ();
 132   test_signal_with_handler ();
 133   test_signal_no_handler ();
 134 #endif
 135   return 0;
 136 }