Commit | Line | Data |
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6aba47ca | 1 | # Copyright 1992, 1994, 1995, 1996, 1997, 1999, 2000, 2007 |
b6ba6518 | 2 | # Free Software Foundation, Inc. |
c906108c SS |
3 | |
4 | # This program is free software; you can redistribute it and/or modify | |
5 | # it under the terms of the GNU General Public License as published by | |
6 | # the Free Software Foundation; either version 2 of the License, or | |
7 | # (at your option) any later version. | |
8 | # | |
9 | # This program is distributed in the hope that it will be useful, | |
10 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | # GNU General Public License for more details. | |
13 | # | |
14 | # You should have received a copy of the GNU General Public License | |
15 | # along with this program; if not, write to the Free Software | |
16 | # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | ||
18 | # Please email any bugs, comments, and/or additions to this file to: | |
19 | # bug-gdb@prep.ai.mit.edu | |
20 | ||
21 | # This file was written by Jeff Law. (law@cs.utah.edu) | |
22 | ||
23 | if $tracelevel then { | |
24 | strace $tracelevel | |
25 | } | |
26 | ||
27 | set prms_id 0 | |
28 | set bug_id 0 | |
29 | ||
30 | set testfile "recurse" | |
31 | set srcfile ${testfile}.c | |
32 | set binfile ${objdir}/${subdir}/${testfile} | |
33 | if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } { | |
b60f0898 JB |
34 | untested recurse.exp |
35 | return -1 | |
c906108c SS |
36 | } |
37 | ||
38 | # Start with a fresh gdb. | |
39 | ||
40 | gdb_exit | |
41 | gdb_start | |
42 | gdb_reinitialize_dir $srcdir/$subdir | |
43 | gdb_load ${binfile} | |
44 | ||
45 | proc recurse_tests {} { | |
46 | ||
958a4e4c MS |
47 | # Disable hardware watchpoints if necessary. |
48 | if [target_info exists gdb,no_hardware_watchpoints] { | |
49 | gdb_test "set can-use-hw-watchpoints 0" "" "" | |
50 | } | |
51 | ||
c906108c SS |
52 | if [runto recurse] then { |
53 | # First we need to step over the assignment of b, so it has a known | |
54 | # value. | |
55 | gdb_test "next" "if \\(a == 1\\)" "next over b = 0 in first instance" | |
56 | gdb_test "watch b" ".*\[Ww\]atchpoint \[0-9]*: b" \ | |
57 | "set first instance watchpoint" | |
58 | ||
59 | # Continue until initial set of b. | |
60 | if [gdb_test "continue" \ | |
61 | "Continuing.*\[Ww\]atchpoint.*: b.*Old value = 0.*New value = 10.*" \ | |
62 | "continue to first instance watchpoint, first time"] then { | |
63 | gdb_suppress_tests; | |
64 | } | |
65 | ||
66 | # Continue inward for a few iterations | |
67 | gdb_test "continue" "Breakpoint.* recurse \\(a=9\\).*" \ | |
68 | "continue to recurse (a = 9)" | |
69 | gdb_test "continue" "Breakpoint.* recurse \\(a=8\\).*" \ | |
70 | "continue to recurse (a = 8)" | |
71 | gdb_test "continue" "Breakpoint.* recurse \\(a=7\\).*" \ | |
72 | "continue to recurse (a = 7)" | |
73 | gdb_test "continue" "Breakpoint.* recurse \\(a=6\\).*" \ | |
74 | "continue to recurse (a = 6)" | |
75 | gdb_test "continue" "Breakpoint.* recurse \\(a=5\\).*" \ | |
76 | "continue to recurse (a = 5)" | |
77 | ||
78 | # Put a watchpoint on another instance of b | |
79 | # First we need to step over the assignment of b, so it has a known | |
80 | # value. | |
81 | gdb_test "next" "if \\(a == 1\\)" "next over b = 0 in second instance" | |
82 | gdb_test "watch b" ".*\[Ww\]atchpoint \[0-9]*: b" \ | |
83 | "set second instance watchpoint" | |
84 | ||
85 | # Continue until initial set of b (second instance). | |
86 | if [gdb_test "continue" \ | |
87 | "Continuing.*\[Ww\]atchpoint.*: b.*Old value = 0.*New value = 5.*"\ | |
88 | "continue to second instance watchpoint, first time"] then { | |
89 | gdb_suppress_tests; | |
90 | } | |
91 | ||
92 | # Continue inward for a few iterations | |
93 | gdb_test "continue" "Breakpoint.* recurse \\(a=4\\).*" \ | |
94 | "continue to recurse (a = 4)" | |
95 | gdb_test "continue" "Breakpoint.* recurse \\(a=3\\).*" \ | |
96 | "continue to recurse (a = 3)" | |
97 | gdb_test "continue" "Breakpoint.* recurse \\(a=2\\).*" \ | |
98 | "continue to recurse (a = 2)" | |
99 | gdb_test "continue" "Breakpoint.* recurse \\(a=1\\).*" \ | |
100 | "continue to recurse (a = 1)" | |
101 | ||
102 | # Continue until second set of b (second instance). | |
103 | if [gdb_test "continue" \ | |
104 | "Continuing.*\[Ww\]atchpoint.*: b.*Old value = 5.*New value = 120.*return.*" \ | |
105 | "continue to second instance watchpoint, second time"] then { | |
106 | gdb_suppress_tests; | |
107 | } | |
108 | ||
109 | # Continue again. We should have a watchpoint go out of scope now | |
110 | if [gdb_test "continue" \ | |
111 | "Continuing.*\[Ww\]atchpoint.*deleted.*recurse \\(a=6\\) .*" \ | |
112 | "second instance watchpoint deleted when leaving scope"] then { | |
113 | gdb_suppress_tests; | |
114 | } | |
115 | ||
116 | # Continue until second set of b (first instance). | |
117 | # 24320 is allowed as the final value for b as that's the value | |
118 | # b would have on systems with 16bit integers. | |
119 | # | |
120 | # We could fix the test program to deal with this too. | |
121 | if [gdb_test "continue" \ | |
122 | "Continuing.*\[Ww\]atchpoint.*b.*Old value = 10.*New value = \(3628800|24320\).*return.*" \ | |
123 | "continue to first instance watchpoint, second time"] then { | |
124 | gdb_suppress_tests | |
125 | } | |
126 | ||
f3bcedc1 CV |
127 | # Continue again. We should have a watchpoint go out of scope now. |
128 | # | |
129 | # The former version expected the test to return to main(). | |
130 | # Now it expects the test to return to main or to stop in the | |
131 | # function's epilogue. | |
132 | # | |
133 | # The problem is that gdb needs to (but doesn't) understand | |
134 | # function epilogues in the same way as for prologues. | |
135 | # | |
136 | # If there is no hardware watchpoint (such as a x86 debug register), | |
137 | # then watchpoints are done "the hard way" by single-stepping the | |
138 | # target until the value of the watched variable changes. If you | |
139 | # are single-stepping, you will eventually step into an epilogue. | |
140 | # When you do that, the "top" stack frame may become partially | |
141 | # deconstructed (as when you pop the frame pointer, for instance), | |
142 | # and from that point on, GDB can no longer make sense of the stack. | |
143 | # | |
144 | # A test which stops in the epilogue is trying to determine when GDB | |
145 | # leaves the stack frame in which the watchpoint was created. It does | |
146 | # this basically by watching for the frame pointer to change. When | |
147 | # the frame pointer changes, the test expects to be back in main, but | |
148 | # instead it is still in the epilogue of the callee. | |
c906108c | 149 | if [gdb_test "continue" \ |
f3bcedc1 | 150 | "Continuing.*\[Ww\]atchpoint.*deleted.*\(main \\(\\) \|21.*\}\).*" \ |
c906108c SS |
151 | "first instance watchpoint deleted when leaving scope"] then { |
152 | gdb_suppress_tests; | |
153 | } | |
154 | } | |
155 | gdb_stop_suppressing_tests; | |
156 | } | |
157 | ||
b22a6027 SB |
158 | # Preserve the old timeout, and set a new one that should be |
159 | # sufficient to avoid timing out during this test. | |
160 | set oldtimeout $timeout | |
161 | set timeout [expr "$timeout + 60"] | |
162 | verbose "Timeout is now $timeout seconds" 2 | |
c906108c | 163 | |
b22a6027 | 164 | recurse_tests |
c906108c | 165 | |
b22a6027 SB |
166 | # Restore the preserved old timeout value. |
167 | set timeout $oldtimeout | |
168 | verbose "Timeout is now $timeout seconds" 2 | |
c906108c | 169 |