Commit | Line | Data |
---|---|---|
a1e167bb AC |
1 | # Copyright 2004 Free Software Foundation, Inc. |
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 | # This test is to check that a frame's "info frame", especially the | |
18 | # saved registers list, doesn't change while that frame isn't current. | |
19 | ||
20 | # It uses the program savedregs.c to construct a somewhat warped | |
21 | # backtrace (contains both signal and dummy frames) and then, at each | |
22 | # step checks that non-inner frames have consistent "info frame" | |
23 | # output. Note that a frame's "info frame" can only be captured after | |
24 | # it is non-current (made a call, interrupted, ...), this is because | |
25 | # instructions executed to perform the call may affect "info frame" | |
26 | # output. | |
27 | ||
28 | if [target_info exists gdb,nosignals] { | |
29 | verbose "Skipping savedregs.exp because of nosignals." | |
30 | continue | |
31 | } | |
32 | ||
33 | if $tracelevel then { | |
34 | strace $tracelevel | |
35 | } | |
36 | ||
37 | set prms_id 0 | |
38 | set bug_id 0 | |
39 | ||
40 | set testfile savedregs | |
41 | set srcfile ${testfile}.c | |
42 | set binfile ${objdir}/${subdir}/${testfile} | |
43 | if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } { | |
44 | untested "Couldn't compile ${module}.c" | |
45 | return -1 | |
46 | } | |
47 | ||
48 | # get things started | |
49 | gdb_exit | |
50 | gdb_start | |
51 | gdb_reinitialize_dir $srcdir/$subdir | |
52 | gdb_load ${binfile} | |
53 | ||
54 | # Advance to main | |
55 | if { ![runto_main] } { | |
56 | gdb_suppress_tests; | |
57 | } | |
58 | ||
59 | proc process_saved_regs { current inner outer } { | |
60 | global gdb_prompt | |
61 | global expect_out | |
62 | global saved_regs | |
63 | ||
64 | # Skip the CURRENT frame. | |
65 | ||
66 | set level 1 | |
67 | ||
68 | # Run over the list of INNER frames capturing the "info frame" | |
69 | # output for each. Both dummy and sigtramp frames need to be | |
70 | # handled specially: they do not yet have correct function names; | |
71 | # and for dummy frames won't have saved registers. If there's a | |
72 | # problem, fail but capture the output anyway, hopefully later | |
73 | # "info frame" requests for that same frame will at least fail in | |
74 | # a consistent manner (stops propogated fails). | |
75 | ||
76 | foreach func $inner { | |
77 | set saved_regs($func) "error" | |
78 | set test "Get $func info frame" | |
79 | # Both dummy and sigtramp frames have problems. | |
80 | switch $func { | |
81 | dummy { | |
82 | # Dummy frame's do not have saved registers, and do | |
83 | # not print <dummy>. | |
1303f75e | 84 | set pat "Stack frame at .*" |
a1e167bb AC |
85 | } |
86 | sigtramp { | |
87 | # Sigtramp frames don't yet print <signal trampoline>. | |
9cf0961b | 88 | set pat "Stack frame at .* Saved registers:.*" |
a1e167bb AC |
89 | } |
90 | default { | |
91 | set pat "Stack frame at .* in $func .* Saved registers:.*" | |
92 | } | |
93 | } | |
94 | # If the "info frame" barf, capture the output anyway so that | |
95 | # it does not cascade further failures. | |
96 | gdb_test_multiple "info frame $level" "$test" { | |
97 | -re "($pat)$gdb_prompt " { | |
98 | set saved_regs($func) "$expect_out(1,string)" | |
99 | pass "$test" | |
100 | } | |
101 | -re "(Stack frame at .*)$gdb_prompt " { | |
102 | set saved_regs($func) "$expect_out(1,string)" | |
103 | fail "$test" | |
104 | } | |
105 | -re "(Cannot access .*)$gdb_prompt " { | |
106 | set saved_regs($func) "$expect_out(1,string)" | |
107 | fail "$test" | |
108 | } | |
109 | } | |
110 | incr level | |
111 | } | |
112 | ||
113 | # Now iterate through the list of OUTER frames checking that the | |
114 | # "info frame" output from each still matches what was captured | |
115 | # during an early query. To avoid cascading failures, checking is | |
116 | # abandoned after the first failure. The assumption is that, | |
117 | # since frames outer to the botched frame rely on the botched | |
118 | # frame's info, those more outer frames are also botched. Besides | |
119 | # we've got the failure we're after. | |
120 | ||
121 | set ok 1 | |
122 | foreach func $outer { | |
123 | set test [concat "Check $func info frame; stack contains" \ | |
124 | $current $inner $outer] | |
125 | if $ok { | |
126 | set ok 0 | |
127 | set pat [string_to_regexp "$saved_regs($func)"] | |
128 | gdb_test_multiple "info frame $level" "$test" { | |
129 | -re "$pat$gdb_prompt " { | |
130 | pass "$test" | |
131 | set ok 1 | |
132 | } | |
133 | } | |
134 | } { | |
135 | pass "$test (skipped)" | |
136 | } | |
137 | incr level | |
138 | } | |
139 | } | |
140 | ||
141 | ||
142 | # Continue to the signal thrower, capture main's saved-reg info. | |
143 | gdb_test "advance thrower" "thrower .* at .*" | |
144 | process_saved_regs thrower { main } { } | |
145 | ||
146 | # Continue to the signal catcher, check main's saved-reg info, capture | |
147 | # catcher's saved-reg info. | |
148 | gdb_test "handle SIGSEGV pass print nostop" | |
149 | gdb_test "advance catcher" "catcher .* at .*" | |
150 | process_saved_regs catcher { sigtramp thrower } { main } | |
151 | ||
152 | # Breakpoint at and call the caller function, saved-regs of main and | |
153 | # catcher, capture caller's registers. | |
154 | gdb_test "break caller" | |
155 | gdb_test "call caller (1,2,3,4,5,6,7,8)" | |
156 | process_saved_regs caller { dummy catcher } { sigtramp thrower main } | |
157 | ||
158 | # Run to callee, again check everything. | |
159 | gdb_test "advance callee" "callee .* at .*" | |
160 | process_saved_regs callee { caller } { dummy catcher sigtramp thrower main } |