Commit | Line | Data |
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c906108c | 1 | #include <stdio.h> |
085dd6e6 | 2 | #include <unistd.h> |
c906108c SS |
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; | |
085dd6e6 | 32 | int ival5 = -1; |
218d2fc6 | 33 | char buf[30] = "testtesttesttesttesttesttestte"; |
c906108c SS |
34 | struct foo |
35 | { | |
36 | int val; | |
37 | }; | |
38 | struct foo struct1, struct2, *ptr1, *ptr2; | |
39 | ||
40 | int doread = 0; | |
41 | ||
fa4727a6 | 42 | char *global_ptr; |
65d79d4b | 43 | char **global_ptr_ptr; |
fa4727a6 | 44 | |
c906108c SS |
45 | void marker1 () |
46 | { | |
47 | } | |
48 | ||
49 | void marker2 () | |
50 | { | |
51 | } | |
52 | ||
53 | void marker4 () | |
54 | { | |
55 | } | |
56 | ||
57 | void marker5 () | |
58 | { | |
59 | } | |
60 | ||
085dd6e6 JM |
61 | void marker6 () |
62 | { | |
63 | } | |
64 | ||
65 | #ifdef PROTOTYPES | |
66 | void recurser (int x) | |
67 | #else | |
68 | void recurser (x) int x; | |
69 | #endif | |
70 | { | |
71 | int local_x; | |
72 | ||
73 | if (x > 0) | |
74 | recurser (x-1); | |
75 | local_x = x; | |
76 | } | |
77 | ||
c906108c SS |
78 | void |
79 | func2 () | |
80 | { | |
085dd6e6 JM |
81 | int local_a; |
82 | static int static_b; | |
83 | ||
84 | ival5++; | |
85 | local_a = ival5; | |
86 | static_b = local_a; | |
c906108c SS |
87 | } |
88 | ||
293e9a31 DC |
89 | void |
90 | func3 () | |
91 | { | |
92 | int x; | |
93 | int y; | |
94 | ||
95 | x = 0; | |
96 | x = 1; /* second x assignment */ | |
97 | y = 1; | |
98 | y = 2; | |
218d2fc6 | 99 | buf[26] = 3; |
293e9a31 DC |
100 | } |
101 | ||
c906108c SS |
102 | int |
103 | func1 () | |
104 | { | |
105 | /* The point of this is that we will set a breakpoint at this call. | |
106 | ||
107 | Then, if DECR_PC_AFTER_BREAK equals the size of a function call | |
108 | instruction (true on a sun3 if this is gcc-compiled--FIXME we | |
109 | should use asm() to make it work for any compiler, present or | |
110 | future), then we will end up branching to the location just after | |
111 | the breakpoint. And we better not confuse that with hitting the | |
112 | breakpoint. */ | |
113 | func2 (); | |
114 | return 73; | |
115 | } | |
116 | ||
fa4727a6 DJ |
117 | void |
118 | func4 () | |
119 | { | |
120 | buf[0] = 3; | |
121 | global_ptr = buf; | |
122 | buf[0] = 7; | |
65d79d4b SDJ |
123 | buf[1] = 5; |
124 | global_ptr_ptr = &global_ptr; | |
125 | buf[0] = 9; | |
126 | global_ptr++; | |
fa4727a6 DJ |
127 | } |
128 | ||
06a64a0b TT |
129 | void |
130 | func5 () | |
131 | { | |
132 | int val = 0, val2 = 23; | |
133 | int *x = &val; | |
134 | ||
135 | /* func5 breakpoint here */ | |
136 | x = &val2; | |
137 | val = 27; | |
138 | } | |
139 | ||
c906108c SS |
140 | int main () |
141 | { | |
142 | #ifdef usestubs | |
143 | set_debug_traps(); | |
144 | breakpoint(); | |
145 | #endif | |
146 | struct1.val = 1; | |
147 | struct2.val = 2; | |
148 | ptr1 = &struct1; | |
149 | ptr2 = &struct2; | |
150 | marker1 (); | |
151 | func1 (); | |
152 | for (count = 0; count < 4; count++) { | |
153 | ival1 = count; | |
154 | ival3 = count; ival4 = count; | |
155 | } | |
156 | ival1 = count; /* Outside loop */ | |
157 | ival2 = count; | |
158 | ival3 = count; ival4 = count; | |
159 | marker2 (); | |
160 | if (doread) | |
161 | { | |
162 | static char msg[] = "type stuff for buf now:"; | |
163 | write (1, msg, sizeof (msg) - 1); | |
164 | read (0, &buf[0], 5); | |
165 | } | |
166 | marker4 (); | |
167 | ||
168 | /* We have a watchpoint on ptr1->val. It should be triggered if | |
169 | ptr1's value changes. */ | |
170 | ptr1 = ptr2; | |
171 | ||
172 | /* This should not trigger the watchpoint. If it does, then we | |
173 | used the wrong value chain to re-insert the watchpoints or we | |
174 | are not evaluating the watchpoint expression correctly. */ | |
175 | struct1.val = 5; | |
176 | marker5 (); | |
177 | ||
178 | /* We have a watchpoint on ptr1->val. It should be triggered if | |
179 | ptr1's value changes. */ | |
180 | ptr1 = ptr2; | |
181 | ||
182 | /* This should not trigger the watchpoint. If it does, then we | |
183 | used the wrong value chain to re-insert the watchpoints or we | |
184 | are not evaluating the watchpoint expression correctly. */ | |
185 | struct1.val = 5; | |
186 | marker5 (); | |
085dd6e6 JM |
187 | |
188 | /* We're going to watch locals of func2, to see that out-of-scope | |
189 | watchpoints are detected and properly deleted. | |
190 | */ | |
191 | marker6 (); | |
192 | ||
193 | /* This invocation is used for watches of a single | |
194 | local variable. */ | |
195 | func2 (); | |
196 | ||
197 | /* This invocation is used for watches of an expression | |
198 | involving a local variable. */ | |
199 | func2 (); | |
200 | ||
201 | /* This invocation is used for watches of a static | |
202 | (non-stack-based) local variable. */ | |
203 | func2 (); | |
204 | ||
205 | /* This invocation is used for watches of a local variable | |
206 | when recursion happens. | |
207 | */ | |
208 | marker6 (); | |
209 | recurser (2); | |
210 | ||
211 | marker6 (); | |
293e9a31 DC |
212 | |
213 | func3 (); | |
214 | ||
fa4727a6 DJ |
215 | func4 (); |
216 | ||
06a64a0b TT |
217 | func5 (); |
218 | ||
c906108c SS |
219 | return 0; |
220 | } |