gdb/testsuite/gdb.trace/circ.exp

   1 # Copyright 1998, 2007, 2008, 2009, 2010, 2011 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 if $tracelevel then {
  19         strace $tracelevel
  20 }
  21
  22
  23 set testfile "circ"
  24 set srcfile ${testfile}.c
  25 set binfile $objdir/$subdir/$testfile
  26
  27 if { [gdb_compile "$srcdir/$subdir/$srcfile" $binfile \
  28         executable {debug nowarnings}] != "" } {
  29     untested circ.exp
  30     return -1
  31 }
  32
  33 # Tests:
  34 # 1) Set up a trace experiment that will collect approximately 10 frames,
  35 #    requiring more than 512 but less than 1024 bytes of cache buffer.
  36 #    (most targets should have at least 1024 bytes of cache buffer!)
  37 #    Run and confirm that it collects all 10 frames.
  38 # 2) Artificially limit the trace buffer to 512 bytes, and rerun the
  39 #    experiment.  Confirm that the first several frames are collected,
  40 #    but that the last several are not.
  41 # 3) Set trace buffer to circular mode, still with the artificial limit
  42 #    of 512 bytes, and rerun the experiment.  Confirm that the last
  43 #    several frames are collected, but the first several are not.
  44 #
  45
  46 # return 0 for success, 1 for failure
  47 proc run_trace_experiment { pass } {
  48     gdb_run_cmd
  49
  50     if [gdb_test "tstart" \
  51             "\[\r\n\]*" \
  52             "start trace experiment, pass $pass"] then { return 1; }
  53     if [gdb_test "continue" \
  54             "Continuing.*Breakpoint \[0-9\]+, end.*" \
  55             "run to end, pass $pass"] then { return 1; }
  56     if [gdb_test "tstop" \
  57             "\[\r\n\]*" \
  58             "stop trace experiment, pass $pass"] then { return 1; }
  59     return 0;
  60 }
  61
  62 # return 0 for success, 1 for failure
  63 proc set_a_tracepoint { func } {
  64     if [gdb_test "trace $func" \
  65             "Tracepoint \[0-9\]+ at .*" \
  66             "set tracepoint at $func"] then {
  67         return 1;
  68     }
  69     if [gdb_trace_setactions "set actions for $func" \
  70             "" \
  71             "collect testload" "^$"] then {
  72         return 1;
  73     }
  74     return 0;
  75 }
  76
  77 # return 0 for success, 1 for failure
  78 proc setup_tracepoints { } {
  79     gdb_delete_tracepoints
  80     if [set_a_tracepoint func0] then { return 1; }
  81     if [set_a_tracepoint func1] then { return 1; }
  82     if [set_a_tracepoint func2] then { return 1; }
  83     if [set_a_tracepoint func3] then { return 1; }
  84     if [set_a_tracepoint func4] then { return 1; }
  85     if [set_a_tracepoint func5] then { return 1; }
  86     if [set_a_tracepoint func6] then { return 1; }
  87     if [set_a_tracepoint func7] then { return 1; }
  88     if [set_a_tracepoint func8] then { return 1; }
  89     if [set_a_tracepoint func9] then { return 1; }
  90     return 0;
  91 }
  92
  93 # return 0 for success, 1 for failure
  94 proc trace_buffer_normal { } {
  95     if [gdb_test "maint packet QTBuffer:size:ffffffff" \
  96             "received: .OK." ""] then {
  97         pass "This test cannot be run on this target"
  98         return 1;
  99     }
 100     if [gdb_test "maint packet QTBuffer:circular:0" \
 101             "received: .OK." ""] then {
 102         pass "This test cannot be run on this target"
 103         return 1;
 104     }
 105     return 0;
 106 }
 107
 108 # return 0 for success, 1 for failure
 109 proc gdb_trace_circular_tests { } {
 110
 111     # We generously give ourselves one "pass" if we successfully
 112     # detect that this test cannot be run on this target!
 113     if { ![gdb_target_supports_trace] } then {
 114         pass "Current target does not support trace"
 115         return 1;
 116     }
 117
 118     if [trace_buffer_normal] then { return 1; }
 119
 120     gdb_test "break begin" ".*" ""
 121     gdb_test "break end"   ".*" ""
 122     gdb_test "tstop"       ".*" ""
 123     gdb_test "tfind none"  ".*" ""
 124
 125     if [setup_tracepoints] then { return 1; }
 126
 127     # First, run the trace experiment with default attributes:
 128     # Make sure it behaves as expected.
 129     if [run_trace_experiment 1] then { return 1; }
 130     if [gdb_test "tfind start" \
 131             "#0  func0 .*" \
 132             "find frame zero, pass 1"] then { return 1; }
 133
 134     if [gdb_test "tfind 9" \
 135             "#0  func9 .*" \
 136             "find frame nine, pass 1"] then { return 1; }
 137
 138     if [gdb_test "tfind none" \
 139             "#0  end .*" \
 140             "quit trace debugging, pass 1"] then { return 1; }
 141
 142     # Then, shrink the trace buffer so that it will not hold
 143     # all ten trace frames.  Verify that frame zero is still
 144     # collected, but frame nine is not.
 145     if [gdb_test "maint packet QTBuffer:size:200" \
 146             "received: .OK." "shrink the target trace buffer"] then {
 147         return 1;
 148     }
 149     if [run_trace_experiment 2] then { return 1; }
 150     if [gdb_test "tfind start" \
 151             "#0  func0 .*" \
 152             "find frame zero, pass 2"] then { return 1; }
 153
 154     if [gdb_test "tfind 9" \
 155             ".* failed to find .*" \
 156             "fail to find frame nine, pass 2"] then { return 1; }
 157
 158     if [gdb_test "tfind none" \
 159             "#0  end .*" \
 160             "quit trace debugging, pass 2"] then { return 1; }
 161
 162     # Finally, make the buffer circular.  Now when it runs out of
 163     # space, it should wrap around and overwrite the earliest frames.
 164     # This means that:
 165     #   1) frame zero will be overwritten and therefore unavailable
 166     #   2) the earliest frame in the buffer will be other-than-zero
 167     #   3) frame nine will be available (unlike on pass 2).
 168     if [gdb_test "maint packet QTBuffer:circular:1" \
 169             "received: .OK." "make the target trace buffer circular"] then {
 170         return 1;
 171     }
 172     if [run_trace_experiment 3] then { return 1; }
 173     if [gdb_test "tfind start" \
 174             "#0  func\[1-9\] .*" \
 175             "first frame is NOT frame zero, pass 3"] then { return 1; }
 176
 177     if [gdb_test "tfind 9" \
 178             "#0  func9 .*" \
 179             "find frame nine, pass 3"] then { return 1; }
 180
 181     if [gdb_test "tfind none" \
 182             "#0  end .*" \
 183             "quit trace debugging, pass 3"] then { return 1; }
 184
 185     return 0;
 186 }
 187
 188 # Start with a fresh gdb.
 189
 190 gdb_exit
 191 gdb_start
 192 gdb_reinitialize_dir $srcdir/$subdir
 193 gdb_load $binfile
 194
 195 if [target_info exists gdb_stub] {
 196     gdb_step_for_stub;
 197 }
 198
 199 gdb_test_no_output "set circular-trace-buffer on" \
 200     "set circular-trace-buffer on"
 201
 202 gdb_test "show circular-trace-buffer" "Target's use of circular trace buffer is on." "show circular-trace-buffer (on)"
 203
 204 gdb_test_no_output "set circular-trace-buffer off" \
 205     "set circular-trace-buffer off"
 206
 207 gdb_test "show circular-trace-buffer" "Target's use of circular trace buffer is off." "show circular-trace-buffer (off)"
 208
 209 # Body of test encased in a proc so we can return prematurely.
 210 if { ![gdb_trace_circular_tests] } then {
 211     # Set trace buffer attributes back to normal
 212     trace_buffer_normal;
 213 }
 214
 215 # Finished!
 216 gdb_test "tfind none" ".*" ""