gdb/testsuite/gdb.trace/circ.exp

   1 # Copyright 1998, 2007, 2008, 2009 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 if [istarget "m68k-*-elf"] then {
  17     pass "Test not supported on this target"
  18     return;
  19 }
  20
  21 load_lib "trace-support.exp"
  22
  23 if $tracelevel then {
  24         strace $tracelevel
  25 }
  26
  27 set prms_id 0
  28 set bug_id 0
  29
  30 set testfile "circ"
  31 set srcfile ${testfile}.c
  32 set binfile $objdir/$subdir/$testfile
  33
  34 if { [gdb_compile "$srcdir/$subdir/$srcfile" $binfile \
  35         executable {debug nowarnings}] != "" } {
  36     untested circ.exp
  37     return -1
  38 }
  39
  40 # Tests:
  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.
  51 #
  52
  53 # return 0 for success, 1 for failure
  54 proc run_trace_experiment { pass } {
  55     gdb_run_cmd
  56
  57     if [gdb_test "tstart" \
  58             "\[\r\n\]*" \
  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" \
  64             "\[\r\n\]*" \
  65             "stop trace experiment, pass $pass"] then { return 1; }
  66     return 0;
  67 }
  68
  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 {
  74         return 1;
  75     }
  76     if [gdb_trace_setactions "set actions for $func" \
  77             "" \
  78             "collect testload" "^$"] then {
  79         return 1;
  80     }
  81     return 0;
  82 }
  83
  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; }
  97     return 0;
  98 }
  99
 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"
 105         return 1;
 106     }
 107     if [gdb_test "maint packet QTBuffer:circular:0" \
 108             "received: .OK." ""] then {
 109         pass "This test cannot be run on this target"
 110         return 1;
 111     }
 112     return 0;
 113 }
 114
 115 # return 0 for success, 1 for failure
 116 proc gdb_trace_circular_tests { } {
 117
 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"
 122         return 1;
 123     }
 124
 125     if [trace_buffer_normal] then { return 1; }
 126
 127     gdb_test "break begin" "" ""
 128     gdb_test "break end"   "" ""
 129     gdb_test "tstop"       "" ""
 130     gdb_test "tfind none"  "" ""
 131
 132     if [setup_tracepoints] then { return 1; }
 133
 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" \
 138             "#0  func0 .*" \
 139             "find frame zero, pass 1"] then { return 1; }
 140
 141     if [gdb_test "tfind 9" \
 142             "#0  func9 .*" \
 143             "find frame nine, pass 1"] then { return 1; }
 144
 145     if [gdb_test "tfind none" \
 146             "#0  end .*" \
 147             "quit trace debugging, pass 1"] then { return 1; }
 148
 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 {
 154         return 1;
 155     }
 156     if [run_trace_experiment 2] then { return 1; }
 157     if [gdb_test "tfind start" \
 158             "#0  func0 .*" \
 159             "find frame zero, pass 2"] then { return 1; }
 160
 161     if [gdb_test "tfind 9" \
 162             ".* failed to find .*" \
 163             "fail to find frame nine, pass 2"] then { return 1; }
 164
 165     if [gdb_test "tfind none" \
 166             "#0  end .*" \
 167             "quit trace debugging, pass 2"] then { return 1; }
 168
 169     # Finally, make the buffer circular.  Now when it runs out of
 170     # space, it should wrap around and overwrite the earliest frames.
 171     # This means that:
 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 {
 177         return 1;
 178     }
 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; }
 183
 184     if [gdb_test "tfind 9" \
 185             "#0  func9 .*" \
 186             "find frame nine, pass 3"] then { return 1; }
 187
 188     if [gdb_test "tfind none" \
 189             "#0  end .*" \
 190             "quit trace debugging, pass 3"] then { return 1; }
 191
 192     return 0;
 193 }
 194
 195 # Start with a fresh gdb.
 196
 197 gdb_exit
 198 gdb_start
 199 gdb_reinitialize_dir $srcdir/$subdir
 200 gdb_load $binfile
 201
 202 if [target_info exists gdb_stub] {
 203     gdb_step_for_stub;
 204 }
 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
 208     trace_buffer_normal;
 209 }
 210
 211 # Finished!
 212 gdb_test "tfind none" "" ""