aboutsummaryrefslogtreecommitdiff
blob: 5925419f08bae021abd28100dfda2344f47bbae5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
#   Copyright 1997-2013 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.


# This program tests the 'catch syscall' functionality.
#
# It was written by Sergio Durigan Junior <sergiodj@linux.vnet.ibm.com>
# on September/2008.

if { [is_remote target] || ![isnative] } then {
    continue
}

# Until "catch syscall" is implemented on other targets...
if { ![istarget "hppa*-hp-hpux*"] && ![istarget "*-linux*"] } {
    continue
}

# This shall be updated whenever 'catch syscall' is implemented
# on some architecture.
#if { ![istarget "i\[34567\]86-*-linux*"]
if { ![istarget "x86_64-*-linux*"] && ![istarget "i\[34567\]86-*-linux*"]
     && ![istarget "powerpc-*-linux*"] && ![istarget "powerpc64-*-linux*"]
     && ![istarget "sparc-*-linux*"] && ![istarget "sparc64-*-linux*"]
     && ![istarget "mips*-linux*"] && ![istarget "arm*-linux*"] } {
     continue
}

standard_testfile

if  { [prepare_for_testing ${testfile}.exp $testfile ${testfile}.c] } {
     untested catch-syscall.exp
     return -1
}

# All (but the last) syscalls from the example code
# They are ordered according to the file, so do not change this.
set all_syscalls { "close" "chroot" "pipe" "write" "read" }
set all_syscalls_numbers { }

# The last syscall (exit()) does not return, so
# we cannot expect the catchpoint to be triggered
# twice.  It is a special case.
set last_syscall "exit_group"
set last_syscall_number { }

# Internal procedure used to check if, after issuing a 'catch syscall'
# command (without arguments), the 'info breakpoints' command displays
# that '"any syscall"' is to be caught.
proc check_info_bp_any_syscall {} {
    # Verifying that the catchpoint appears in the 'info breakpoints'
    # command, but with "<any syscall>".
    set thistest "catch syscall appears in 'info breakpoints'"
    gdb_test "info breakpoints" ".*catchpoint.*keep y.*syscall \"<any syscall>\".*" $thistest
}

# Internal procedure used to check if, after issuing a 'catch syscall X'
# command (with arguments), the 'info breakpoints' command displays
# that the syscall 'X' is to be caught.
proc check_info_bp_specific_syscall { syscall } {
    set thistest "syscall(s) $syscall appears in 'info breakpoints'"
    gdb_test "info breakpoints" ".*catchpoint.*keep y.*syscall(\[(\]s\[)\])? (.)?${syscall}(.)?.*" $thistest
}

# Internal procedure used to check if, after issuing a 'catch syscall X'
# command (with many arguments), the 'info breakpoints' command displays
# that the syscalls 'X' are to be caught.
proc check_info_bp_many_syscalls { syscalls } {
    set filter_str ""

    foreach name $syscalls {
      set filter_str "${filter_str}${name}, "
    }

    set filter_str [ string trimright $filter_str ", " ]

    set thistest "syscalls $filter_str appears in 'info breakpoints'"
    gdb_test "info breakpoints" ".*catchpoint.*keep y.*syscalls (.)?${filter_str}(.)?.*" $thistest
}

# This procedure checks if there was a call to a syscall.
proc check_call_to_syscall { syscall } {
    global decimal

    set thistest "program has called $syscall"
    gdb_test "continue" "Catchpoint $decimal \\(call to syscall .?${syscall}.?\\).*" $thistest
}

# This procedure checks if the syscall returned.
proc check_return_from_syscall { syscall } {
    global decimal

    set thistest "syscall $syscall has returned"
    gdb_test "continue" "Catchpoint $decimal \\(returned from syscall ${syscall}\\).*" $thistest
}

# Internal procedure that performs two 'continue' commands and checks if
# a syscall call AND return occur.
proc check_continue { syscall } {
    # Testing if the 'continue' stops at the
    # specified syscall_name.  If it does, then it should
    # first print that the infeior has called the syscall,
    # and after print that the syscall has returned.

    # Testing if the inferiorr has called the syscall.
    check_call_to_syscall $syscall
    # And now, that the syscall has returned.
    check_return_from_syscall $syscall
}

# Inserts a syscall catchpoint with an argument.
proc insert_catch_syscall_with_arg { syscall } {
    global decimal

    # Trying to set the catchpoint
    set thistest "catch syscall with arguments ($syscall)"
    gdb_test "catch syscall $syscall" "Catchpoint $decimal \\(syscall \'?${syscall}\'?( \[${decimal}\])?\\)" $thistest

    check_info_bp_specific_syscall $syscall
}

# Inserts a syscall catchpoint with many arguments.
proc insert_catch_syscall_with_many_args { syscalls numbers } {
    global decimal

    set catch [ join $syscalls " " ]
    set filter_str ""

    foreach name $syscalls number $numbers {
      set filter_str "${filter_str}'${name}' \\\[${number}\\\] "
    }

    set filter_str [ string trimright $filter_str " " ]

    # Trying to set the catchpoint
    set thistest "catch syscall with arguments ($filter_str)"
    gdb_test "catch syscall $catch" "Catchpoint $decimal \\(syscalls ${filter_str}\\).*" $thistest

    check_info_bp_many_syscalls $syscalls
}

proc check_for_program_end {} {
    # Deleting the catchpoints
    delete_breakpoints

    gdb_continue_to_end
}

proc test_catch_syscall_without_args {} {
    global all_syscalls last_syscall decimal

    with_test_prefix "without arguments" {
	# Trying to set the syscall.
	gdb_test "catch syscall" "Catchpoint $decimal \\(any syscall\\)"

	check_info_bp_any_syscall

	# We have to check every syscall.
	foreach name $all_syscalls {
	    check_continue $name
	}

	# At last but not least, we check if the inferior has called
	# the last (exit) syscall.
	check_call_to_syscall $last_syscall

	# Now let's see if the inferior correctly finishes.
	check_for_program_end
    }
}

proc test_catch_syscall_with_args {} {
    with_test_prefix "with arguments" {
	set syscall_name "close"
	insert_catch_syscall_with_arg $syscall_name

	# Can we continue until we catch the syscall?
	check_continue $syscall_name

	# Now let's see if the inferior correctly finishes.
	check_for_program_end
    }
}

proc test_catch_syscall_with_many_args {} {
    with_test_prefix "with many arguments" {
	global all_syscalls all_syscalls_numbers

	insert_catch_syscall_with_many_args $all_syscalls $all_syscalls_numbers

	# Can we continue until we catch the syscalls?
	foreach name $all_syscalls {
	    check_continue $name
	}

	# Now let's see if the inferior correctly finishes.
	check_for_program_end
    }
}

proc test_catch_syscall_with_wrong_args {} {
    with_test_prefix "wrong args" {
	# mlock is not called from the source
	set syscall_name "mlock"
	insert_catch_syscall_with_arg $syscall_name

	# Now, we must verify if the program stops with a continue.
	# If it doesn't, everything is right (since we don't have
	# a syscall named "mlock" in it).  Otherwise, this is a failure.
	set thistest "catch syscall with unused syscall ($syscall_name)"
	gdb_continue_to_end $thistest
    }
}

proc test_catch_syscall_restarting_inferior {} {
    with_test_prefix "restarting inferior" {
	set syscall_name "chroot"

	with_test_prefix "entry" {
	    insert_catch_syscall_with_arg $syscall_name

	    # Let's first reach the entry of the syscall.
	    check_call_to_syscall $syscall_name
	}

	with_test_prefix "entry/return" {
	    # Now, restart the program.
	    rerun_to_main

	    # And check for entry/return.
	    check_continue $syscall_name

	    # Can we finish?
	    check_for_program_end
	}
    }
}

proc test_catch_syscall_fail_nodatadir {} {
    with_test_prefix "fail no datadir" {
	# Sanitizing.
	delete_breakpoints

	# Make sure GDB doesn't load the syscalls xml from the system
	# data directory.
	gdb_test_no_output "set data-directory /the/path/to/nowhere"

	# Testing to see if we receive a warning when calling "catch
	# syscall" without XML support (without datadir).
	set thistest "catch syscall displays a warning when there is no XML support"
	gdb_test "catch syscall" \
	    "warning: Could not load the syscall XML file.*warning: GDB will not be able to display syscall names nor to verify if.*any provided syscall numbers are valid.*Catchpoint .*(syscall).*" \
	    $thistest

	# Since the catchpoint was set, we must check if it's present
	# in "info breakpoints" output.
	check_info_bp_any_syscall

	# Sanitizing.
	delete_breakpoints
    }
}

proc do_syscall_tests {} {
    # NOTE: We don't have to point gdb at the correct data-directory.
    # For the build tree that is handled by INTERNAL_GDBFLAGS.

    # Verify that the 'catch syscall' help is available
    set thistest "help catch syscall"
    gdb_test "help catch syscall" "Catch system calls.*" $thistest

    # Try to set a catchpoint to a nonsense syscall
    set thistest "catch syscall to a nonsense syscall is prohibited"
    gdb_test "catch syscall nonsense_syscall" "Unknown syscall name .*" $thistest

    # Regression test for syscall completer bug.
    gdb_test "complete catch syscall close chroo" \
	"catch syscall close chroot" \
	"complete catch syscall with multiple words"

    # Testing the 'catch syscall' command without arguments.
    # This test should catch any syscalls.
    if [runto_main] then { test_catch_syscall_without_args }

    # Testing the 'catch syscall' command with arguments.
    # This test should only catch the specified syscall.
    if [runto_main] then { test_catch_syscall_with_args }

    # Testing the 'catch syscall' command with many arguments.
    # This test should catch $all_syscalls.
    if [runto_main] then { test_catch_syscall_with_many_args }

    # Testing the 'catch syscall' command with WRONG arguments.
    # This test should not trigger any catchpoints.
    if [runto_main] then { test_catch_syscall_with_wrong_args }

    # Testing the 'catch' syscall command during a restart of
    # the inferior.
    if [runto_main] then { test_catch_syscall_restarting_inferior }
}

proc test_catch_syscall_without_args_noxml {} {
    with_test_prefix "without args noxml" {
	# We will need the syscall names even not using it because we
	# need to know know many syscalls are in the example file.
	global all_syscalls last_syscall_number all_syscalls_numbers

	delete_breakpoints

	gdb_test "catch syscall" "Catchpoint .*(syscall).*"

	# Now, we should be able to set a catchpoint, and GDB shall
	# not display the warning anymore.
	foreach name $all_syscalls number $all_syscalls_numbers {
	    with_test_prefix "$name" {
		check_continue $number
	    }
	}

	# At last but not least, we check if the inferior has called
	# the last (exit) syscall.
	check_call_to_syscall $last_syscall_number

	delete_breakpoints
    }
}

proc test_catch_syscall_with_args_noxml {} {
    with_test_prefix "with args noxml" {
	global all_syscalls_numbers

	delete_breakpoints

	# Inserting all syscalls numbers to be caught
	foreach syscall_number $all_syscalls_numbers {
	    insert_catch_syscall_with_arg $syscall_number
	}

	# Checking that all syscalls are caught.
	foreach syscall_number $all_syscalls_numbers {
	    check_continue $syscall_number
	}

	delete_breakpoints
    }
}

proc test_catch_syscall_with_wrong_args_noxml {} {
    with_test_prefix "with wrong args noxml" {
	delete_breakpoints

	# Even without XML support, GDB should not accept unknown
	# syscall names for the catchpoint.
	gdb_test "catch syscall nonsense_syscall" \
	    "Unknown syscall name .nonsense_syscall.*"

	delete_breakpoints
    }
}

proc do_syscall_tests_without_xml {} {
    # Make sure GDB doesn't load the syscalls xml from the system data
    # directory.
    gdb_test_no_output "set data-directory /the/path/to/nowhere"

    # Let's test if we can catch syscalls without XML support.
    # We should succeed, but GDB is not supposed to print syscall names.
    if [runto_main] then { test_catch_syscall_without_args_noxml }

    # The only valid argument "catch syscall" should accept is the
    # syscall number, and not the name (since it can't translate a
    # name to a number).
    if [runto_main] then { test_catch_syscall_with_args_noxml }

    # Now, we'll try to provide a syscall name (valid or not) to the command,
    # and expect it to fail.
    if [runto_main] then { test_catch_syscall_with_wrong_args_noxml }
}

# This procedure fills the vector "all_syscalls_numbers" with the proper
# numbers for the used syscalls according to the architecture.
proc fill_all_syscalls_numbers {} {
    global all_syscalls_numbers last_syscall_number all_syscalls

    foreach syscall $all_syscalls {
	lappend all_syscalls_numbers [get_integer_valueof "${syscall}_syscall" -1]
    }

    set last_syscall_number [get_integer_valueof "exit_group_syscall" -1]
}

# Fill all the syscalls numbers before starting anything.
fill_all_syscalls_numbers

# Execute the tests, using XML support
if { ![gdb_skip_xml_test] } {
  clean_restart $binfile
  do_syscall_tests

  # Now, we have to see if GDB displays a warning when we
  # don't set the data-directory but try to use catch syscall
  # anyway.  For that, we must restart GDB first.
  clean_restart $binfile
  test_catch_syscall_fail_nodatadir
}

# Restart gdb
clean_restart $binfile

# Execute the tests, without XML support.  In this case, GDB will
# only display syscall numbers, and not syscall names.
do_syscall_tests_without_xml