gdb/testsuite/gdb.trace/circ.exp

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