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 | |
fabde485 PA |
45 | struct foo2 |
46 | { | |
47 | int val[2]; | |
48 | }; | |
49 | struct foo2 foo2; | |
50 | ||
51 | struct foo4 | |
52 | { | |
53 | int val[4]; | |
54 | }; | |
55 | struct foo4 foo4; | |
56 | ||
c906108c SS |
57 | void marker1 () |
58 | { | |
59 | } | |
60 | ||
61 | void marker2 () | |
62 | { | |
63 | } | |
64 | ||
65 | void marker4 () | |
66 | { | |
67 | } | |
68 | ||
69 | void marker5 () | |
70 | { | |
71 | } | |
72 | ||
085dd6e6 JM |
73 | void marker6 () |
74 | { | |
75 | } | |
76 | ||
77 | #ifdef PROTOTYPES | |
78 | void recurser (int x) | |
79 | #else | |
80 | void recurser (x) int x; | |
81 | #endif | |
82 | { | |
97ddaa9b | 83 | int local_x = 0; |
085dd6e6 JM |
84 | |
85 | if (x > 0) | |
86 | recurser (x-1); | |
87 | local_x = x; | |
88 | } | |
89 | ||
c906108c SS |
90 | void |
91 | func2 () | |
92 | { | |
bdddb4de | 93 | int local_a = 0; |
085dd6e6 JM |
94 | static int static_b; |
95 | ||
bdddb4de | 96 | /* func2 breakpoint here */ |
085dd6e6 JM |
97 | ival5++; |
98 | local_a = ival5; | |
99 | static_b = local_a; | |
c906108c SS |
100 | } |
101 | ||
293e9a31 DC |
102 | void |
103 | func3 () | |
104 | { | |
105 | int x; | |
106 | int y; | |
107 | ||
108 | x = 0; | |
109 | x = 1; /* second x assignment */ | |
110 | y = 1; | |
111 | y = 2; | |
218d2fc6 | 112 | buf[26] = 3; |
293e9a31 DC |
113 | } |
114 | ||
c906108c SS |
115 | int |
116 | func1 () | |
117 | { | |
118 | /* The point of this is that we will set a breakpoint at this call. | |
119 | ||
120 | Then, if DECR_PC_AFTER_BREAK equals the size of a function call | |
121 | instruction (true on a sun3 if this is gcc-compiled--FIXME we | |
122 | should use asm() to make it work for any compiler, present or | |
123 | future), then we will end up branching to the location just after | |
124 | the breakpoint. And we better not confuse that with hitting the | |
125 | breakpoint. */ | |
126 | func2 (); | |
127 | return 73; | |
128 | } | |
129 | ||
fa4727a6 DJ |
130 | void |
131 | func4 () | |
132 | { | |
133 | buf[0] = 3; | |
134 | global_ptr = buf; | |
135 | buf[0] = 7; | |
65d79d4b SDJ |
136 | buf[1] = 5; |
137 | global_ptr_ptr = &global_ptr; | |
138 | buf[0] = 9; | |
139 | global_ptr++; | |
fa4727a6 DJ |
140 | } |
141 | ||
06a64a0b TT |
142 | void |
143 | func5 () | |
144 | { | |
145 | int val = 0, val2 = 23; | |
146 | int *x = &val; | |
147 | ||
148 | /* func5 breakpoint here */ | |
149 | x = &val2; | |
150 | val = 27; | |
151 | } | |
152 | ||
fabde485 PA |
153 | void |
154 | func6 (void) | |
155 | { | |
156 | /* func6 breakpoint here */ | |
157 | foo2.val[1] = 0; | |
158 | foo2.val[1] = 11; | |
159 | } | |
160 | ||
161 | void | |
162 | func7 (void) | |
163 | { | |
164 | /* func7 breakpoint here */ | |
165 | foo4.val[3] = 0; | |
166 | foo4.val[3] = 33; | |
167 | } | |
168 | ||
c906108c SS |
169 | int main () |
170 | { | |
c906108c SS |
171 | struct1.val = 1; |
172 | struct2.val = 2; | |
173 | ptr1 = &struct1; | |
174 | ptr2 = &struct2; | |
175 | marker1 (); | |
176 | func1 (); | |
177 | for (count = 0; count < 4; count++) { | |
178 | ival1 = count; | |
179 | ival3 = count; ival4 = count; | |
180 | } | |
181 | ival1 = count; /* Outside loop */ | |
182 | ival2 = count; | |
183 | ival3 = count; ival4 = count; | |
184 | marker2 (); | |
185 | if (doread) | |
186 | { | |
187 | static char msg[] = "type stuff for buf now:"; | |
188 | write (1, msg, sizeof (msg) - 1); | |
189 | read (0, &buf[0], 5); | |
190 | } | |
191 | marker4 (); | |
192 | ||
193 | /* We have a watchpoint on ptr1->val. It should be triggered if | |
194 | ptr1's value changes. */ | |
195 | ptr1 = ptr2; | |
196 | ||
197 | /* This should not trigger the watchpoint. If it does, then we | |
198 | used the wrong value chain to re-insert the watchpoints or we | |
199 | are not evaluating the watchpoint expression correctly. */ | |
200 | struct1.val = 5; | |
201 | marker5 (); | |
202 | ||
203 | /* We have a watchpoint on ptr1->val. It should be triggered if | |
204 | ptr1's value changes. */ | |
205 | ptr1 = ptr2; | |
206 | ||
207 | /* This should not trigger the watchpoint. If it does, then we | |
208 | used the wrong value chain to re-insert the watchpoints or we | |
209 | are not evaluating the watchpoint expression correctly. */ | |
210 | struct1.val = 5; | |
211 | marker5 (); | |
085dd6e6 JM |
212 | |
213 | /* We're going to watch locals of func2, to see that out-of-scope | |
214 | watchpoints are detected and properly deleted. | |
215 | */ | |
216 | marker6 (); | |
217 | ||
218 | /* This invocation is used for watches of a single | |
219 | local variable. */ | |
220 | func2 (); | |
221 | ||
222 | /* This invocation is used for watches of an expression | |
223 | involving a local variable. */ | |
224 | func2 (); | |
225 | ||
226 | /* This invocation is used for watches of a static | |
227 | (non-stack-based) local variable. */ | |
228 | func2 (); | |
229 | ||
230 | /* This invocation is used for watches of a local variable | |
231 | when recursion happens. | |
232 | */ | |
233 | marker6 (); | |
234 | recurser (2); | |
235 | ||
97ddaa9b PH |
236 | /* This invocation is used for watches of a local variable with explicitly |
237 | specified scope when recursion happens. | |
238 | */ | |
239 | marker6 (); | |
240 | recurser (2); | |
241 | ||
085dd6e6 | 242 | marker6 (); |
293e9a31 DC |
243 | |
244 | func3 (); | |
245 | ||
fa4727a6 DJ |
246 | func4 (); |
247 | ||
06a64a0b TT |
248 | func5 (); |
249 | ||
fabde485 PA |
250 | func6 (); |
251 | ||
252 | func7 (); | |
253 | ||
c906108c SS |
254 | return 0; |
255 | } |