1 # Copyright 1998, 2007, 2008 Free Software Foundation, Inc.
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 3 of the License, or
6 # (at your option) any later version.
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.
13 # You should have received a copy of the GNU General Public License
14 # along with this program. If not, see <http://www.gnu.org/licenses/>.
16 if [istarget "m68k-*-elf"] then {
17 pass "Test not supported on this target"
21 load_lib "trace-support.exp"
31 set srcfile ${testfile}.c
32 set binfile $objdir/$subdir/$testfile
34 if { [gdb_compile "$srcdir/$subdir/$srcfile" $binfile \
35 executable {debug nowarnings}] != "" } {
41 # 1) Set up a trace experiment that will collect approximately 10 frames,
42 # requiring more than 512 but less than 1024 bytes of cache buffer.
43 # (most targets should have at least 1024 bytes of cache buffer!)
44 # Run and confirm that it collects all 10 frames.
45 # 2) Artificially limit the trace buffer to 512 bytes, and rerun the
46 # experiment. Confirm that the first several frames are collected,
47 # but that the last several are not.
48 # 3) Set trace buffer to circular mode, still with the artificial limit
49 # of 512 bytes, and rerun the experiment. Confirm that the last
50 # several frames are collected, but the first several are not.
53 # return 0 for success, 1 for failure
54 proc run_trace_experiment { pass } {
57 if [gdb_test "tstart" \
59 "start trace experiment, pass $pass"] then { return 1; }
60 if [gdb_test "continue" \
61 "Continuing.*Breakpoint \[0-9\]+, end.*" \
62 "run to end, pass $pass"] then { return 1; }
63 if [gdb_test "tstop" \
65 "stop trace experiment, pass $pass"] then { return 1; }
69 # return 0 for success, 1 for failure
70 proc set_a_tracepoint { func } {
71 if [gdb_test "trace $func" \
72 "Tracepoint \[0-9\]+ at .*" \
73 "set tracepoint at $func"] then {
76 if [gdb_trace_setactions "set actions for $func" \
78 "collect testload" "^$"] then {
84 # return 0 for success, 1 for failure
85 proc setup_tracepoints { } {
86 gdb_delete_tracepoints
87 if [set_a_tracepoint func0] then { return 1; }
88 if [set_a_tracepoint func1] then { return 1; }
89 if [set_a_tracepoint func2] then { return 1; }
90 if [set_a_tracepoint func3] then { return 1; }
91 if [set_a_tracepoint func4] then { return 1; }
92 if [set_a_tracepoint func5] then { return 1; }
93 if [set_a_tracepoint func6] then { return 1; }
94 if [set_a_tracepoint func7] then { return 1; }
95 if [set_a_tracepoint func8] then { return 1; }
96 if [set_a_tracepoint func9] then { return 1; }
100 # return 0 for success, 1 for failure
101 proc trace_buffer_normal { } {
102 if [gdb_test "maint packet QTBuffer:size:ffffffff" \
103 "received: .OK." ""] then {
104 pass "This test cannot be run on this target"
107 if [gdb_test "maint packet QTBuffer:circular:0" \
108 "received: .OK." ""] then {
109 pass "This test cannot be run on this target"
115 # return 0 for success, 1 for failure
116 proc gdb_trace_circular_tests { } {
118 # We generously give ourselves one "pass" if we successfully
119 # detect that this test cannot be run on this target!
120 if { ![gdb_target_supports_trace] } then {
121 pass "Current target does not support trace"
125 if [trace_buffer_normal] then { return 1; }
127 gdb_test "break begin" "" ""
128 gdb_test "break end" "" ""
129 gdb_test "tstop" "" ""
130 gdb_test "tfind none" "" ""
132 if [setup_tracepoints] then { return 1; }
134 # First, run the trace experiment with default attributes:
135 # Make sure it behaves as expected.
136 if [run_trace_experiment 1] then { return 1; }
137 if [gdb_test "tfind start" \
139 "find frame zero, pass 1"] then { return 1; }
141 if [gdb_test "tfind 9" \
143 "find frame nine, pass 1"] then { return 1; }
145 if [gdb_test "tfind none" \
147 "quit trace debugging, pass 1"] then { return 1; }
149 # Then, shrink the trace buffer so that it will not hold
150 # all ten trace frames. Verify that frame zero is still
151 # collected, but frame nine is not.
152 if [gdb_test "maint packet QTBuffer:size:200" \
153 "received: .OK." "shrink the target trace buffer"] then {
156 if [run_trace_experiment 2] then { return 1; }
157 if [gdb_test "tfind start" \
159 "find frame zero, pass 2"] then { return 1; }
161 if [gdb_test "tfind 9" \
162 ".* failed to find .*" \
163 "fail to find frame nine, pass 2"] then { return 1; }
165 if [gdb_test "tfind none" \
167 "quit trace debugging, pass 2"] then { return 1; }
169 # Finally, make the buffer circular. Now when it runs out of
170 # space, it should wrap around and overwrite the earliest frames.
172 # 1) frame zero will be overwritten and therefore unavailable
173 # 2) the earliest frame in the buffer will be other-than-zero
174 # 3) frame nine will be available (unlike on pass 2).
175 if [gdb_test "maint packet QTBuffer:circular:1" \
176 "received: .OK." "make the target trace buffer circular"] then {
179 if [run_trace_experiment 3] then { return 1; }
180 if [gdb_test "tfind start" \
181 "#0 func\[1-9\] .*" \
182 "first frame is NOT frame zero, pass 3"] then { return 1; }
184 if [gdb_test "tfind 9" \
186 "find frame nine, pass 3"] then { return 1; }
188 if [gdb_test "tfind none" \
190 "quit trace debugging, pass 3"] then { return 1; }
195 # Start with a fresh gdb.
199 gdb_reinitialize_dir $srcdir/$subdir
202 if [target_info exists gdb_stub] {
205 # Body of test encased in a proc so we can return prematurely.
206 if { ![gdb_trace_circular_tests] } then {
207 # Set trace buffer attributes back to normal
212 gdb_test "tfind none" "" ""