OpenCores
URL https://opencores.org/ocsvn/scarts/scarts/trunk

Subversion Repositories scarts

[/] [scarts/] [trunk/] [toolchain/] [scarts-gdb/] [gdb-6.8/] [gdb/] [testsuite/] [gdb.base/] [watchpoint.c] - Blame information for rev 25

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 25 jlechner
#include <stdio.h>
2
#include <unistd.h>
3
/*
4
 *      Since using watchpoints can be very slow, we have to take some pains to
5
 *      ensure that we don't run too long with them enabled or we run the risk
6
 *      of having the test timeout.  To help avoid this, we insert some marker
7
 *      functions in the execution stream so we can set breakpoints at known
8
 *      locations, without worrying about invalidating line numbers by changing
9
 *      this file.  We use null bodied functions are markers since gdb does
10
 *      not support breakpoints at labeled text points at this time.
11
 *
12
 *      One place we need is a marker for when we start executing our tests
13
 *      instructions rather than any process startup code, so we insert one
14
 *      right after entering main().  Another is right before we finish, before
15
 *      we start executing any process termination code.
16
 *
17
 *      Another problem we have to guard against, at least for the test
18
 *      suite, is that we need to ensure that the line that causes the
19
 *      watchpoint to be hit is still the current line when gdb notices
20
 *      the hit.  Depending upon the specific code generated by the compiler,
21
 *      the instruction after the one that triggers the hit may be part of
22
 *      the same line or part of the next line.  Thus we ensure that there
23
 *      are always some instructions to execute on the same line after the
24
 *      code that should trigger the hit.
25
 */
26
 
27
int count = -1;
28
int ival1 = -1;
29
int ival2 = -1;
30
int ival3 = -1;
31
int ival4 = -1;
32
int ival5 = -1;
33
char buf[10];
34
struct foo
35
{
36
  int val;
37
};
38
struct foo struct1, struct2, *ptr1, *ptr2;
39
 
40
int doread = 0;
41
 
42
void marker1 ()
43
{
44
}
45
 
46
void marker2 ()
47
{
48
}
49
 
50
void marker4 ()
51
{
52
}
53
 
54
void marker5 ()
55
{
56
}
57
 
58
void marker6 ()
59
{
60
}
61
 
62
#ifdef PROTOTYPES
63
void recurser (int  x)
64
#else
65
void recurser (x) int  x;
66
#endif
67
{
68
  int  local_x;
69
 
70
  if (x > 0)
71
    recurser (x-1);
72
  local_x = x;
73
}
74
 
75
void
76
func2 ()
77
{
78
  int  local_a;
79
  static int  static_b;
80
 
81
  ival5++;
82
  local_a = ival5;
83
  static_b = local_a;
84
}
85
 
86
void
87
func3 ()
88
{
89
  int x;
90
  int y;
91
 
92
  x = 0;
93
  x = 1;                                /* second x assignment */
94
  y = 1;
95
  y = 2;
96
}
97
 
98
int
99
func1 ()
100
{
101
  /* The point of this is that we will set a breakpoint at this call.
102
 
103
     Then, if DECR_PC_AFTER_BREAK equals the size of a function call
104
     instruction (true on a sun3 if this is gcc-compiled--FIXME we
105
     should use asm() to make it work for any compiler, present or
106
     future), then we will end up branching to the location just after
107
     the breakpoint.  And we better not confuse that with hitting the
108
     breakpoint.  */
109
  func2 ();
110
  return 73;
111
}
112
 
113
int main ()
114
{
115
#ifdef usestubs
116
  set_debug_traps();
117
  breakpoint();
118
#endif
119
  struct1.val = 1;
120
  struct2.val = 2;
121
  ptr1 = &struct1;
122
  ptr2 = &struct2;
123
  marker1 ();
124
  func1 ();
125
  for (count = 0; count < 4; count++) {
126
    ival1 = count;
127
    ival3 = count; ival4 = count;
128
  }
129
  ival1 = count; /* Outside loop */
130
  ival2 = count;
131
  ival3 = count; ival4 = count;
132
  marker2 ();
133
  if (doread)
134
    {
135
      static char msg[] = "type stuff for buf now:";
136
      write (1, msg, sizeof (msg) - 1);
137
      read (0, &buf[0], 5);
138
    }
139
  marker4 ();
140
 
141
  /* We have a watchpoint on ptr1->val.  It should be triggered if
142
     ptr1's value changes.  */
143
  ptr1 = ptr2;
144
 
145
  /* This should not trigger the watchpoint.  If it does, then we
146
     used the wrong value chain to re-insert the watchpoints or we
147
     are not evaluating the watchpoint expression correctly.  */
148
  struct1.val = 5;
149
  marker5 ();
150
 
151
  /* We have a watchpoint on ptr1->val.  It should be triggered if
152
     ptr1's value changes.  */
153
  ptr1 = ptr2;
154
 
155
  /* This should not trigger the watchpoint.  If it does, then we
156
     used the wrong value chain to re-insert the watchpoints or we
157
     are not evaluating the watchpoint expression correctly.  */
158
  struct1.val = 5;
159
  marker5 ();
160
 
161
  /* We're going to watch locals of func2, to see that out-of-scope
162
     watchpoints are detected and properly deleted.
163
     */
164
  marker6 ();
165
 
166
  /* This invocation is used for watches of a single
167
     local variable. */
168
  func2 ();
169
 
170
  /* This invocation is used for watches of an expression
171
     involving a local variable. */
172
  func2 ();
173
 
174
  /* This invocation is used for watches of a static
175
     (non-stack-based) local variable. */
176
  func2 ();
177
 
178
  /* This invocation is used for watches of a local variable
179
     when recursion happens.
180
     */
181
  marker6 ();
182
  recurser (2);
183
 
184
  marker6 ();
185
 
186
  func3 ();
187
 
188
  return 0;
189
}

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.