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2fa63963 | 1 | # Copyright 2004, 2005, 2006 Free Software Foundation, Inc. |
f0fd9238 AC |
2 | |
3 | # This program is free software; you can redistribute it and/or modify | |
4 | # it under the terms of the GNU General Public License as published by | |
5 | # the Free Software Foundation; either version 2 of the License, or | |
6 | # (at your option) any later version. | |
7 | # | |
8 | # This program is distributed in the hope that it will be useful, | |
9 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | # GNU General Public License for more details. | |
12 | # | |
13 | # You should have received a copy of the GNU General Public License | |
14 | # along with this program; if not, write to the Free Software | |
15 | # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
16 | ||
17 | ||
18 | # The program sigstep.c creates a very simple backtrace containing one | |
b04e311d AC |
19 | # signal handler and signal trampoline. A flag is set and then the |
20 | # handler returns. This is repeated at infinitum. | |
f0fd9238 AC |
21 | |
22 | # This test runs the program up to the signal handler, and then | |
b04e311d | 23 | # attempts to step/next out of the handler and back into main. |
f0fd9238 AC |
24 | |
25 | if [target_info exists gdb,nosignals] { | |
26 | verbose "Skipping sigstep.exp because of nosignals." | |
27 | continue | |
28 | } | |
29 | ||
30 | if $tracelevel then { | |
31 | strace $tracelevel | |
32 | } | |
33 | ||
34 | set prms_id 0 | |
35 | set bug_id 0 | |
36 | ||
37 | set testfile sigstep | |
38 | set srcfile ${testfile}.c | |
39 | set binfile ${objdir}/${subdir}/${testfile} | |
40 | if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } { | |
41 | untested "Couldn't compile ${module}.c" | |
42 | return -1 | |
43 | } | |
44 | ||
45 | # get things started | |
46 | gdb_exit | |
47 | gdb_start | |
48 | gdb_reinitialize_dir $srcdir/$subdir | |
49 | gdb_load ${binfile} | |
50 | ||
51 | gdb_test "display/i \$pc" | |
52 | ||
53 | # Advance to main | |
54 | if { ![runto_main] } then { | |
55 | gdb_suppress_tests; | |
56 | } | |
57 | ||
58 | # Pass all the alarms straight through (but verbosely) | |
59 | # gdb_test "handle SIGALRM print pass nostop" | |
60 | # gdb_test "handle SIGVTALRM print pass nostop" | |
61 | # gdb_test "handle SIGPROF print pass nostop" | |
62 | ||
63 | # Run to the signal handler, validate the backtrace. | |
64 | gdb_test "break handler" | |
65 | gdb_test "continue" ".* handler .*" "continue to stepi handler" | |
66 | send_gdb "bt\n" | |
67 | gdb_expect_list "backtrace for nexti" ".*$gdb_prompt $" { | |
68 | "\[\r\n\]+.0 \[^\r\n\]* handler " | |
69 | "\[\r\n\]+.1 .signal handler called." | |
70 | "\[\r\n\]+.2 \[^\r\n\]* main .*" | |
71 | } | |
72 | ||
73 | proc advance { i } { | |
74 | global gdb_prompt | |
b04e311d | 75 | set prefix "$i from handler" |
f0fd9238 AC |
76 | |
77 | # Get us back into the handler | |
b04e311d | 78 | gdb_test "continue" ".* handler .*" "$prefix; continue to handler" |
f0fd9238 | 79 | |
b04e311d | 80 | set test "$prefix; leave handler" |
f0fd9238 | 81 | gdb_test_multiple "$i" "${test}" { |
8608915f MK |
82 | -re "Could not insert single-step breakpoint.*$gdb_prompt $" { |
83 | setup_kfail "sparc*-*-openbsd*" gdb/1736 | |
84 | fail "$test (could not insert single-step breakpoint)" | |
85 | } | |
f0fd9238 AC |
86 | -re "done = 1;.*${gdb_prompt} $" { |
87 | send_gdb "$i\n" | |
714e341b | 88 | exp_continue -continue_timer |
f0fd9238 AC |
89 | } |
90 | -re "\} .. handler .*${gdb_prompt} $" { | |
91 | send_gdb "$i\n" | |
714e341b | 92 | exp_continue -continue_timer |
f0fd9238 AC |
93 | } |
94 | -re "Program exited normally.*${gdb_prompt} $" { | |
42edda50 AC |
95 | setup_kfail powerpc-*-*bsd* gdb/1639 |
96 | fail "$test (program exited)" | |
61bcae62 | 97 | } |
b04e311d | 98 | -re "(while ..done|done = 0).*${gdb_prompt} $" { |
61bcae62 AC |
99 | # After stepping out of a function /r signal-handler, GDB will |
100 | # advance the inferior until it is at the first instruction of | |
101 | # a code-line. While typically things return to the middle of | |
102 | # the "while..." (and hence GDB advances the inferior to the | |
103 | # "return..." line) it is also possible for the return to land | |
104 | # on the first instruction of "while...". Accept both cases. | |
f0fd9238 AC |
105 | pass "$test" |
106 | } | |
107 | } | |
108 | } | |
109 | ||
110 | proc advancei { i } { | |
111 | global gdb_prompt | |
b04e311d | 112 | set prefix "$i from handleri" |
f0fd9238 AC |
113 | set program_exited 0 |
114 | ||
115 | # Get us back into the handler | |
b04e311d | 116 | gdb_test "continue" ".* handler .*" "$prefix; continue to handler" |
f0fd9238 | 117 | |
b04e311d | 118 | set test "$prefix; leave handler" |
f0fd9238 | 119 | gdb_test_multiple "$i" "${test}" { |
04f6ecf2 DJ |
120 | -re "Cannot insert breakpoint 0.*${gdb_prompt} $" { |
121 | # Some platforms use a special read-only page for signal | |
122 | # trampolines. We can't set a breakpoint there, and we | |
123 | # don't gracefully fall back to single-stepping. | |
124 | setup_kfail "i?86-*-linux*" gdb/1736 | |
598b7a6f | 125 | setup_kfail "*-*-openbsd*" gdb/1736 |
04f6ecf2 DJ |
126 | fail "$test (could not set breakpoint)" |
127 | return | |
128 | } | |
8608915f MK |
129 | -re "Could not insert single-step breakpoint.*$gdb_prompt $" { |
130 | setup_kfail "sparc*-*-openbsd*" gdb/1736 | |
131 | fail "$test (could not insert single-step breakpoint)" | |
132 | } | |
2fa63963 DJ |
133 | -re "Breakpoint \[0-9\]*, handler .*${gdb_prompt} $" { |
134 | fail "$test (hit breakpoint again)" | |
135 | } | |
f0fd9238 AC |
136 | -re "done = 1;.*${gdb_prompt} $" { |
137 | send_gdb "$i\n" | |
714e341b | 138 | exp_continue -continue_timer |
f0fd9238 AC |
139 | } |
140 | -re "\} .. handler .*${gdb_prompt} $" { | |
141 | send_gdb "$i\n" | |
714e341b | 142 | exp_continue -continue_timer |
f0fd9238 AC |
143 | } |
144 | -re "signal handler called.*${gdb_prompt} $" { | |
145 | pass "$test" | |
146 | } | |
f0fd9238 AC |
147 | -re "main .*${gdb_prompt} $" { |
148 | fail "$test (in main)" | |
149 | } | |
42edda50 AC |
150 | -re "Program exited normally.*${gdb_prompt} $" { |
151 | fail "$test (program exited)" | |
152 | set program_exited 1 | |
153 | } | |
f0fd9238 AC |
154 | -re "Make handler return now.*y or n. $" { |
155 | send_gdb "y\n" | |
714e341b | 156 | exp_continue -continue_timer |
f0fd9238 AC |
157 | } |
158 | } | |
159 | ||
b04e311d | 160 | set test "$prefix; leave signal trampoline" |
f0fd9238 AC |
161 | gdb_test_multiple "$i" "${test}" { |
162 | -re "while .*${gdb_prompt} $" { | |
163 | pass "$test (in main)" | |
164 | } | |
165 | -re "signal handler called.*${gdb_prompt} $" { | |
166 | send_gdb "$i\n" | |
714e341b | 167 | exp_continue -continue_timer |
f0fd9238 AC |
168 | } |
169 | -re "return .*${gdb_prompt} $" { | |
170 | fail "$test (stepped)" | |
171 | } | |
172 | -re "Make .*frame return now.*y or n. $" { | |
173 | send_gdb "y\n" | |
714e341b | 174 | exp_continue -continue_timer |
f0fd9238 | 175 | } |
42edda50 AC |
176 | -re "Program exited normally.*${gdb_prompt} $" { |
177 | kfail gdb/1639 "$test (program exited)" | |
178 | set program_exited 1 | |
179 | } | |
f0fd9238 AC |
180 | -re "The program is not being run.*${gdb_prompt} $" { |
181 | if { $program_exited } { | |
182 | # Previously kfailed with an exit | |
42edda50 | 183 | pass "$test (the program is not being run)" |
f0fd9238 | 184 | } else { |
42edda50 | 185 | fail "$test (the program is not being run)" |
f0fd9238 AC |
186 | } |
187 | } | |
188 | } | |
189 | } | |
190 | ||
b04e311d AC |
191 | # Check that we can step/next our way out of a signal handler. |
192 | ||
f0fd9238 AC |
193 | advance step |
194 | advancei stepi | |
195 | ||
196 | advance next | |
197 | advancei nexti | |
198 | ||
199 | advancei finish | |
200 | advancei return | |
b04e311d AC |
201 | gdb_test "set done = 1" "" "Set done as return will have skipped it" |
202 | ||
203 | ||
204 | # Check that we can step/next our way into / over a signal handler. | |
205 | ||
206 | # There are at least the following cases: breakpoint @pc VS breakpoint | |
207 | # in handler VS step / next / continue. | |
208 | ||
209 | # Use the real-time itimer, as otherwize the process never gets enough | |
210 | # time to expire the timer. | |
211 | ||
212 | delete_breakpoints | |
213 | set infinite_loop [gdb_get_line_number {while (!done)}] | |
214 | gdb_test "set itimer = itimer_real" | |
215 | gdb_test "break [gdb_get_line_number {done = 0}]" | |
216 | ||
217 | # Try stepping when there's a signal pending, and a breakpoint at the | |
218 | # handler. Should step into the signal handler. | |
219 | ||
220 | proc skip_to_handler { i } { | |
221 | global gdb_prompt | |
222 | global infinite_loop | |
223 | set prefix "$i to handler" | |
224 | ||
225 | # Run around to the done | |
60fe1a51 | 226 | # You can add more patterns to this if you need them. |
b04e311d AC |
227 | set test "$prefix; resync" |
228 | gdb_test_multiple "continue" "$test" { | |
229 | -re "done = 0.*$gdb_prompt " { | |
230 | pass "$test" | |
231 | } | |
b04e311d AC |
232 | } |
233 | ||
234 | # Advance to the infinite loop | |
235 | gdb_test "advance $infinite_loop" "" "$prefix; advance to infinite loop" | |
236 | ||
237 | # Make the signal pending | |
238 | sleep 1 | |
239 | ||
240 | # Insert / remove the handler breakpoint. | |
241 | gdb_test "break handler" "" "$prefix; break handler" | |
242 | gdb_test "$i" " handler .*" "$prefix; performing $i" | |
243 | gdb_test "clear handler" "" "$prefix; clear handler" | |
244 | } | |
245 | ||
246 | skip_to_handler step | |
247 | skip_to_handler next | |
248 | skip_to_handler continue | |
249 | ||
2dedb159 AC |
250 | # Try stepping when there's a signal pending, and a breakpoint at the |
251 | # handler's entry-point. Should step into the signal handler stopping | |
252 | # at the entry-point. | |
253 | ||
254 | # Some systems (e.x., GNU/Linux as of 2004-08-30), when delivering a | |
255 | # signal, resume the process at the first instruction of the signal | |
256 | # handler and not the first instruction of the signal trampoline. The | |
257 | # stack is constructed such that the signal handler still appears to | |
258 | # have been called by the trampoline code. This test checks that it | |
259 | # is possible to stop the inferior, even at that first instruction. | |
260 | ||
261 | proc skip_to_handler_entry { i } { | |
262 | global gdb_prompt | |
263 | global infinite_loop | |
264 | set prefix "$i to handler entry" | |
265 | ||
266 | # Run around to the done | |
60fe1a51 | 267 | # You can add more patterns to this if you need them. |
2dedb159 AC |
268 | set test "$prefix; resync" |
269 | gdb_test_multiple "continue" "$test" { | |
270 | -re "done = 0.*$gdb_prompt " { | |
271 | pass "$test" | |
272 | } | |
2dedb159 AC |
273 | } |
274 | ||
275 | # Advance to the infinite loop | |
276 | gdb_test "advance $infinite_loop" "" "$prefix; advance to infinite loop" | |
277 | ||
278 | # Make the signal pending | |
279 | sleep 1 | |
280 | ||
281 | # Insert / remove the handler breakpoint. | |
282 | gdb_test "break *handler" "" "$prefix; break handler" | |
283 | gdb_test "$i" " handler .*" "$prefix; performing $i" | |
284 | gdb_test "clear *handler" "" "$prefix; clear handler" | |
285 | } | |
286 | ||
287 | skip_to_handler_entry step | |
288 | skip_to_handler_entry next | |
289 | skip_to_handler_entry continue | |
290 | ||
b04e311d AC |
291 | # Try stepping when there's a signal pending but no breakpoints. |
292 | # Should skip the handler advancing to the next line. | |
293 | ||
294 | proc skip_over_handler { i } { | |
295 | global gdb_prompt | |
296 | global infinite_loop | |
297 | set prefix "$i over handler" | |
298 | ||
299 | # Run around to the done | |
60fe1a51 | 300 | # You can add more patterns to this if you need them. |
b04e311d AC |
301 | set test "$prefix; resync" |
302 | gdb_test_multiple "continue" "$test" { | |
303 | -re "done = 0.*$gdb_prompt " { | |
304 | pass "$test" | |
305 | } | |
b04e311d AC |
306 | } |
307 | ||
308 | # Advance to the infinite loop | |
309 | gdb_test "advance $infinite_loop" "" "$prefix; advance to infinite loop" | |
310 | ||
311 | # Make the signal pending | |
312 | sleep 1 | |
313 | ||
314 | gdb_test "$i" "done = 0.*" "$prefix; performing $i" | |
315 | } | |
316 | ||
317 | skip_over_handler step | |
318 | skip_over_handler next | |
319 | skip_over_handler continue | |
320 | ||
321 | # Try stepping when there's a signal pending, a pre-existing | |
322 | # breakpoint at the current instruction, and a breakpoint in the | |
323 | # handler. Should advance to the signal handler. | |
324 | ||
325 | proc breakpoint_to_handler { i } { | |
326 | global gdb_prompt | |
327 | global infinite_loop | |
328 | set prefix "$i on breakpoint, to handler" | |
329 | ||
330 | # Run around to the done | |
60fe1a51 | 331 | # You can add more patterns to this if you need them. |
b04e311d AC |
332 | set test "$prefix; resync" |
333 | gdb_test_multiple "continue" "$test" { | |
334 | -re "done = 0.*$gdb_prompt " { | |
335 | pass "$test" | |
336 | } | |
b04e311d AC |
337 | } |
338 | ||
339 | gdb_test "break $infinite_loop" "" "$prefix; break infinite loop" | |
340 | gdb_test "break handler" "" "$prefix; break handler" | |
341 | ||
342 | # Continue to the infinite loop | |
343 | gdb_test "continue" "while ..done.*" "$prefix; continue to infinite loop" | |
344 | ||
345 | # Make the signal pending | |
346 | sleep 1 | |
347 | ||
348 | setup_kfail "i*86-*-*" gdb/1738 | |
349 | gdb_test "$i" " handler .*" "$prefix; performing $i" | |
350 | gdb_test "clear $infinite_loop" "" "$prefix; clear infinite loop" | |
351 | gdb_test "clear handler" "" "$prefix; clear handler" | |
352 | } | |
353 | ||
354 | breakpoint_to_handler step | |
355 | breakpoint_to_handler next | |
356 | breakpoint_to_handler continue | |
357 | ||
2dedb159 AC |
358 | # Try stepping when there's a signal pending, and a breakpoint at the |
359 | # handler's entry instruction and a breakpoint at the current | |
360 | # instruction. Should step into the signal handler and breakpoint at | |
361 | # that entry instruction. | |
362 | ||
363 | # Some systems (e.x., GNU/Linux as of 2004-08-30), when delivering a | |
364 | # signal, resume the process at the first instruction of the signal | |
365 | # handler and not the first instruction of the signal trampoline. The | |
366 | # stack is constructed such that the signal handler still appears to | |
367 | # have been called by the trampoline code. This test checks that it | |
368 | # is possible to stop the inferior, even at that first instruction. | |
369 | ||
370 | proc breakpoint_to_handler_entry { i } { | |
371 | global gdb_prompt | |
372 | global infinite_loop | |
373 | set prefix "$i on breakpoint, to handler entry" | |
374 | ||
375 | # Run around to the done | |
60fe1a51 | 376 | # You can add more patterns to this if you need them. |
2dedb159 AC |
377 | set test "$prefix; resync" |
378 | gdb_test_multiple "continue" "$test" { | |
379 | -re "done = 0.*$gdb_prompt " { | |
380 | pass "$test" | |
381 | } | |
2dedb159 AC |
382 | } |
383 | ||
384 | gdb_test "break $infinite_loop" "" "$prefix; break infinite loop" | |
385 | gdb_test "break *handler" "" "$prefix; break handler" | |
386 | ||
387 | # Continue to the infinite loop | |
388 | gdb_test "continue" "while ..done.*" "$prefix; continue to infinite loop" | |
389 | ||
390 | # Make the signal pending | |
391 | sleep 1 | |
392 | ||
393 | setup_kfail "i*86-*-*" gdb/1738 | |
394 | gdb_test "$i" " handler .*" "$prefix; performing $i" | |
395 | gdb_test "clear $infinite_loop" "" "$prefix; clear infinite loop" | |
396 | gdb_test "clear *handler" "" "$prefix; clear handler" | |
397 | } | |
398 | ||
399 | breakpoint_to_handler_entry step | |
400 | breakpoint_to_handler_entry next | |
401 | breakpoint_to_handler_entry continue | |
402 | ||
b04e311d AC |
403 | # Try stepping when there's a signal pending, and a pre-existing |
404 | # breakpoint at the current instruction, and no breakpoint in the | |
405 | # handler. Should advance to the next line. | |
406 | ||
407 | proc breakpoint_over_handler { i } { | |
408 | global gdb_prompt | |
409 | global infinite_loop | |
410 | set prefix "$i on breakpoint, skip handler" | |
411 | ||
412 | # Run around to the done | |
60fe1a51 | 413 | # You can add more patterns to this if you need them. |
b04e311d AC |
414 | set test "$prefix; resync" |
415 | gdb_test_multiple "continue" "$test" { | |
416 | -re "done = 0.*$gdb_prompt " { | |
417 | pass "$test" | |
418 | } | |
b04e311d AC |
419 | } |
420 | ||
421 | gdb_test "break $infinite_loop" "" "$prefix; break infinite loop" | |
422 | ||
423 | # Continue to the infinite loop | |
424 | gdb_test "continue" "while ..done.*" "$prefix; continue to infinite loop" | |
425 | ||
426 | # Make the signal pending | |
427 | sleep 1 | |
428 | ||
b04e311d AC |
429 | gdb_test "$i" "done = 0.*" "$prefix; performing $i" |
430 | gdb_test "clear $infinite_loop" "" "$prefix; clear infinite loop" | |
431 | } | |
432 | ||
433 | breakpoint_over_handler step | |
434 | breakpoint_over_handler next | |
435 | breakpoint_over_handler continue |