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; |
c906108c SS |
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 | ||
085dd6e6 JM |
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 | ||
c906108c SS |
75 | void |
76 | func2 () | |
77 | { | |
085dd6e6 JM |
78 | int local_a; |
79 | static int static_b; | |
80 | ||
81 | ival5++; | |
82 | local_a = ival5; | |
83 | static_b = local_a; | |
c906108c SS |
84 | } |
85 | ||
293e9a31 DC |
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 | ||
c906108c SS |
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 (); | |
085dd6e6 JM |
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 (); | |
293e9a31 DC |
185 | |
186 | func3 (); | |
187 | ||
c906108c SS |
188 | return 0; |
189 | } |