gdb/testsuite/gdb.trace/circ.exp

   1 # Copyright 1998, 2007-2012 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 3 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, see <http://www.gnu.org/licenses/>.
  15
  16 load_lib "trace-support.exp"
  17
  18
  19 set testfile "circ"
  20 set srcfile ${testfile}.c
  21 set binfile $objdir/$subdir/$testfile
  22
  23 if { [gdb_compile "$srcdir/$subdir/$srcfile" $binfile \
  24         executable {debug nowarnings}] != "" } {
  25     untested circ.exp
  26     return -1
  27 }
  28
  29 # Tests:
  30 # 1) Set up a trace experiment that will collect approximately 10 frames,
  31 #    requiring more than 512 but less than 1024 bytes of cache buffer.
  32 #    (most targets should have at least 1024 bytes of cache buffer!)
  33 #    Run and confirm that it collects all 10 frames.
  34 # 2) Artificially limit the trace buffer to 512 bytes, and rerun the
  35 #    experiment.  Confirm that the first several frames are collected,
  36 #    but that the last several are not.
  37 # 3) Set trace buffer to circular mode, still with the artificial limit
  38 #    of 512 bytes, and rerun the experiment.  Confirm that the last
  39 #    several frames are collected, but the first several are not.
  40 #
  41
  42 # return 0 for success, 1 for failure
  43 proc run_trace_experiment { pass } {
  44     gdb_run_cmd
  45
  46     if [gdb_test "tstart" \
  47             "\[\r\n\]*" \
  48             "start trace experiment, pass $pass"] then { return 1; }
  49     if [gdb_test "continue" \
  50             "Continuing.*Breakpoint \[0-9\]+, end.*" \
  51             "run to end, pass $pass"] then { return 1; }
  52     if [gdb_test "tstop" \
  53             "\[\r\n\]*" \
  54             "stop trace experiment, pass $pass"] then { return 1; }
  55     return 0;
  56 }
  57
  58 # return 0 for success, 1 for failure
  59 proc set_a_tracepoint { func } {
  60     if [gdb_test "trace $func" \
  61             "Tracepoint \[0-9\]+ at .*" \
  62             "set tracepoint at $func"] then {
  63         return 1;
  64     }
  65     if [gdb_trace_setactions "set actions for $func" \
  66             "" \
  67             "collect testload" "^$"] then {
  68         return 1;
  69     }
  70     return 0;
  71 }
  72
  73 # return 0 for success, 1 for failure
  74 proc setup_tracepoints { } {
  75     gdb_delete_tracepoints
  76     if [set_a_tracepoint func0] then { return 1; }
  77     if [set_a_tracepoint func1] then { return 1; }
  78     if [set_a_tracepoint func2] then { return 1; }
  79     if [set_a_tracepoint func3] then { return 1; }
  80     if [set_a_tracepoint func4] then { return 1; }
  81     if [set_a_tracepoint func5] then { return 1; }
  82     if [set_a_tracepoint func6] then { return 1; }
  83     if [set_a_tracepoint func7] then { return 1; }
  84     if [set_a_tracepoint func8] then { return 1; }
  85     if [set_a_tracepoint func9] then { return 1; }
  86     return 0;
  87 }
  88
  89 # return 0 for success, 1 for failure
  90 proc trace_buffer_normal { } {
  91     global gdb_prompt
  92
  93     set ok 0
  94     set test "maint packet QTBuffer:size:ffffffff"
  95     gdb_test_multiple $test $test {
  96         -re "received: .OK.\r\n$gdb_prompt $" {
  97             set ok 1
  98             pass $test
  99         }
 100         -re "\r\n$gdb_prompt $" {
 101         }
 102     }
 103     if { !$ok } {
 104         unsupported $test
 105         return 1;
 106     }
 107
 108     set ok 0
 109     set test "maint packet QTBuffer:circular:0"
 110     gdb_test_multiple $test $test {
 111         -re "received: .OK.\r\n$gdb_prompt $" {
 112             set ok 1
 113             pass $test
 114         }
 115         -re "\r\n$gdb_prompt $" {
 116         }
 117     }
 118     if { !$ok } {
 119         unsupported $test
 120         return 1;
 121     }
 122
 123     return 0;
 124 }
 125
 126 # return 0 for success, 1 for failure
 127 proc gdb_trace_circular_tests { } {
 128     if { ![gdb_target_supports_trace] } then {
 129         unsupported "Current target does not support trace"
 130         return 1;
 131     }
 132
 133     if [trace_buffer_normal] then { return 1; }
 134
 135     gdb_test "break begin" ".*" ""
 136     gdb_test "break end"   ".*" ""
 137     gdb_test "tstop"       ".*" ""
 138     gdb_test "tfind none"  ".*" ""
 139
 140     if [setup_tracepoints] then { return 1; }
 141
 142     # First, run the trace experiment with default attributes:
 143     # Make sure it behaves as expected.
 144     if [run_trace_experiment 1] then { return 1; }
 145     if [gdb_test "tfind start" \
 146             "#0  func0 .*" \
 147             "find frame zero, pass 1"] then { return 1; }
 148
 149     if [gdb_test "tfind 9" \
 150             "#0  func9 .*" \
 151             "find frame nine, pass 1"] then { return 1; }
 152
 153     if [gdb_test "tfind none" \
 154             "#0  end .*" \
 155             "quit trace debugging, pass 1"] then { return 1; }
 156
 157     # Then, shrink the trace buffer so that it will not hold
 158     # all ten trace frames.  Verify that frame zero is still
 159     # collected, but frame nine is not.
 160     if [gdb_test "maint packet QTBuffer:size:200" \
 161             "received: .OK." "shrink the target trace buffer"] then {
 162         return 1;
 163     }
 164     if [run_trace_experiment 2] then { return 1; }
 165     if [gdb_test "tfind start" \
 166             "#0  func0 .*" \
 167             "find frame zero, pass 2"] then { return 1; }
 168
 169     if [gdb_test "tfind 9" \
 170             ".* failed to find .*" \
 171             "fail to find frame nine, pass 2"] then { return 1; }
 172
 173     if [gdb_test "tfind none" \
 174             "#0  end .*" \
 175             "quit trace debugging, pass 2"] then { return 1; }
 176
 177     # Finally, make the buffer circular.  Now when it runs out of
 178     # space, it should wrap around and overwrite the earliest frames.
 179     # This means that:
 180     #   1) frame zero will be overwritten and therefore unavailable
 181     #   2) the earliest frame in the buffer will be other-than-zero
 182     #   3) frame nine will be available (unlike on pass 2).
 183     if [gdb_test "maint packet QTBuffer:circular:1" \
 184             "received: .OK." "make the target trace buffer circular"] then {
 185         return 1;
 186     }
 187     if [run_trace_experiment 3] then { return 1; }
 188     if [gdb_test "tfind start" \
 189             "#0  func\[1-9\] .*" \
 190             "first frame is NOT frame zero, pass 3"] then { return 1; }
 191
 192     if [gdb_test "tfind 9" \
 193             "#0  func9 .*" \
 194             "find frame nine, pass 3"] then { return 1; }
 195
 196     if [gdb_test "tfind none" \
 197             "#0  end .*" \
 198             "quit trace debugging, pass 3"] then { return 1; }
 199
 200     return 0;
 201 }
 202
 203 # Start with a fresh gdb.
 204
 205 gdb_exit
 206 gdb_start
 207 gdb_reinitialize_dir $srcdir/$subdir
 208 gdb_load $binfile
 209
 210 gdb_test_no_output "set circular-trace-buffer on" \
 211     "set circular-trace-buffer on"
 212
 213 gdb_test "show circular-trace-buffer" "Target's use of circular trace buffer is on." "show circular-trace-buffer (on)"
 214
 215 gdb_test_no_output "set circular-trace-buffer off" \
 216     "set circular-trace-buffer off"
 217
 218 gdb_test "show circular-trace-buffer" "Target's use of circular trace buffer is off." "show circular-trace-buffer (off)"
 219
 220 # Body of test encased in a proc so we can return prematurely.
 221 if { ![gdb_trace_circular_tests] } then {
 222     # Set trace buffer attributes back to normal
 223     trace_buffer_normal;
 224 }
 225
 226 # Finished!
 227 gdb_test "tfind none" ".*" ""