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 | ||
3a1115a0 TT |
57 | struct foo5 |
58 | { | |
59 | struct { int x; } *p; | |
60 | }; | |
61 | ||
62 | struct foo5 *nullptr; | |
63 | ||
c906108c SS |
64 | void marker1 () |
65 | { | |
66 | } | |
67 | ||
68 | void marker2 () | |
69 | { | |
70 | } | |
71 | ||
72 | void marker4 () | |
73 | { | |
74 | } | |
75 | ||
76 | void marker5 () | |
77 | { | |
78 | } | |
79 | ||
085dd6e6 JM |
80 | void marker6 () |
81 | { | |
82 | } | |
83 | ||
085dd6e6 | 84 | void recurser (int x) |
085dd6e6 | 85 | { |
97ddaa9b | 86 | int local_x = 0; |
085dd6e6 JM |
87 | |
88 | if (x > 0) | |
89 | recurser (x-1); | |
90 | local_x = x; | |
91 | } | |
92 | ||
c906108c SS |
93 | void |
94 | func2 () | |
95 | { | |
bdddb4de | 96 | int local_a = 0; |
085dd6e6 JM |
97 | static int static_b; |
98 | ||
bdddb4de | 99 | /* func2 breakpoint here */ |
085dd6e6 JM |
100 | ival5++; |
101 | local_a = ival5; | |
102 | static_b = local_a; | |
c906108c SS |
103 | } |
104 | ||
293e9a31 DC |
105 | void |
106 | func3 () | |
107 | { | |
108 | int x; | |
109 | int y; | |
110 | ||
111 | x = 0; | |
112 | x = 1; /* second x assignment */ | |
113 | y = 1; | |
114 | y = 2; | |
218d2fc6 | 115 | buf[26] = 3; |
293e9a31 DC |
116 | } |
117 | ||
c906108c SS |
118 | int |
119 | func1 () | |
120 | { | |
121 | /* The point of this is that we will set a breakpoint at this call. | |
122 | ||
123 | Then, if DECR_PC_AFTER_BREAK equals the size of a function call | |
124 | instruction (true on a sun3 if this is gcc-compiled--FIXME we | |
125 | should use asm() to make it work for any compiler, present or | |
126 | future), then we will end up branching to the location just after | |
127 | the breakpoint. And we better not confuse that with hitting the | |
128 | breakpoint. */ | |
129 | func2 (); | |
130 | return 73; | |
131 | } | |
132 | ||
fa4727a6 DJ |
133 | void |
134 | func4 () | |
135 | { | |
136 | buf[0] = 3; | |
137 | global_ptr = buf; | |
138 | buf[0] = 7; | |
65d79d4b SDJ |
139 | buf[1] = 5; |
140 | global_ptr_ptr = &global_ptr; | |
141 | buf[0] = 9; | |
142 | global_ptr++; | |
fa4727a6 DJ |
143 | } |
144 | ||
06a64a0b TT |
145 | void |
146 | func5 () | |
147 | { | |
148 | int val = 0, val2 = 23; | |
149 | int *x = &val; | |
150 | ||
151 | /* func5 breakpoint here */ | |
152 | x = &val2; | |
153 | val = 27; | |
154 | } | |
155 | ||
fabde485 PA |
156 | void |
157 | func6 (void) | |
158 | { | |
159 | /* func6 breakpoint here */ | |
160 | foo2.val[1] = 0; | |
161 | foo2.val[1] = 11; | |
162 | } | |
163 | ||
164 | void | |
165 | func7 (void) | |
166 | { | |
167 | /* func7 breakpoint here */ | |
168 | foo4.val[3] = 0; | |
169 | foo4.val[3] = 33; | |
170 | } | |
171 | ||
c906108c SS |
172 | int main () |
173 | { | |
c906108c SS |
174 | struct1.val = 1; |
175 | struct2.val = 2; | |
176 | ptr1 = &struct1; | |
177 | ptr2 = &struct2; | |
178 | marker1 (); | |
179 | func1 (); | |
180 | for (count = 0; count < 4; count++) { | |
181 | ival1 = count; | |
182 | ival3 = count; ival4 = count; | |
183 | } | |
184 | ival1 = count; /* Outside loop */ | |
185 | ival2 = count; | |
186 | ival3 = count; ival4 = count; | |
187 | marker2 (); | |
188 | if (doread) | |
189 | { | |
190 | static char msg[] = "type stuff for buf now:"; | |
191 | write (1, msg, sizeof (msg) - 1); | |
192 | read (0, &buf[0], 5); | |
193 | } | |
194 | marker4 (); | |
195 | ||
196 | /* We have a watchpoint on ptr1->val. It should be triggered if | |
197 | ptr1's value changes. */ | |
198 | ptr1 = ptr2; | |
199 | ||
200 | /* This should not trigger the watchpoint. If it does, then we | |
201 | used the wrong value chain to re-insert the watchpoints or we | |
202 | are not evaluating the watchpoint expression correctly. */ | |
203 | struct1.val = 5; | |
204 | marker5 (); | |
205 | ||
206 | /* We have a watchpoint on ptr1->val. It should be triggered if | |
207 | ptr1's value changes. */ | |
208 | ptr1 = ptr2; | |
209 | ||
210 | /* This should not trigger the watchpoint. If it does, then we | |
211 | used the wrong value chain to re-insert the watchpoints or we | |
212 | are not evaluating the watchpoint expression correctly. */ | |
213 | struct1.val = 5; | |
214 | marker5 (); | |
085dd6e6 JM |
215 | |
216 | /* We're going to watch locals of func2, to see that out-of-scope | |
217 | watchpoints are detected and properly deleted. | |
218 | */ | |
219 | marker6 (); | |
220 | ||
221 | /* This invocation is used for watches of a single | |
222 | local variable. */ | |
223 | func2 (); | |
224 | ||
225 | /* This invocation is used for watches of an expression | |
226 | involving a local variable. */ | |
227 | func2 (); | |
228 | ||
229 | /* This invocation is used for watches of a static | |
230 | (non-stack-based) local variable. */ | |
231 | func2 (); | |
232 | ||
233 | /* This invocation is used for watches of a local variable | |
234 | when recursion happens. | |
235 | */ | |
236 | marker6 (); | |
237 | recurser (2); | |
238 | ||
97ddaa9b PH |
239 | /* This invocation is used for watches of a local variable with explicitly |
240 | specified scope when recursion happens. | |
241 | */ | |
242 | marker6 (); | |
243 | recurser (2); | |
244 | ||
085dd6e6 | 245 | marker6 (); |
293e9a31 DC |
246 | |
247 | func3 (); | |
248 | ||
fa4727a6 DJ |
249 | func4 (); |
250 | ||
06a64a0b TT |
251 | func5 (); |
252 | ||
fabde485 PA |
253 | func6 (); |
254 | ||
255 | func7 (); | |
256 | ||
c906108c SS |
257 | return 0; |
258 | } |