gdb/testsuite/gdb.trace/circ.exp

   1 # Copyright 1998, 2007 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 2 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, write to the Free Software
  15 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  16
  17 # Please email any bugs, comments, and/or additions to this file to:
  18 # bug-gdb@prep.ai.mit.edu
  19
  20 if [istarget "m68k-*-elf"] then {
  21     pass "Test not supported on this target"
  22     return;
  23 }
  24
  25 load_lib "trace-support.exp"
  26
  27 if $tracelevel then {
  28         strace $tracelevel
  29 }
  30
  31 set prms_id 0
  32 set bug_id 0
  33
  34 set testfile "circ"
  35 set srcfile ${testfile}.c
  36 set binfile $objdir/$subdir/$testfile
  37
  38 if { [gdb_compile "$srcdir/$subdir/$srcfile" $binfile \
  39         executable {debug nowarnings}] != "" } {
  40     untested circ.exp
  41     return -1
  42 }
  43
  44 # Tests:
  45 # 1) Set up a trace experiment that will collect approximately 10 frames,
  46 #    requiring more than 512 but less than 1024 bytes of cache buffer.
  47 #    (most targets should have at least 1024 bytes of cache buffer!)
  48 #    Run and confirm that it collects all 10 frames.
  49 # 2) Artificially limit the trace buffer to 512 bytes, and rerun the
  50 #    experiment.  Confirm that the first several frames are collected,
  51 #    but that the last several are not.
  52 # 3) Set trace buffer to circular mode, still with the artificial limit
  53 #    of 512 bytes, and rerun the experiment.  Confirm that the last
  54 #    several frames are collected, but the first several are not.
  55 #
  56
  57 # return 0 for success, 1 for failure
  58 proc run_trace_experiment { pass } {
  59     gdb_run_cmd
  60
  61     if [gdb_test "tstart" \
  62             "\[\r\n\]*" \
  63             "start trace experiment, pass $pass"] then { return 1; }
  64     if [gdb_test "continue" \
  65             "Continuing.*Breakpoint \[0-9\]+, end.*" \
  66             "run to end, pass $pass"] then { return 1; }
  67     if [gdb_test "tstop" \
  68             "\[\r\n\]*" \
  69             "stop trace experiment, pass $pass"] then { return 1; }
  70     return 0;
  71 }
  72
  73 # return 0 for success, 1 for failure
  74 proc set_a_tracepoint { func } {
  75     if [gdb_test "trace $func" \
  76             "Tracepoint \[0-9\]+ at .*" \
  77             "set tracepoint at $func"] then {
  78         return 1;
  79     }
  80     if [gdb_trace_setactions "set actions for $func" \
  81             "" \
  82             "collect testload" "^$"] then {
  83         return 1;
  84     }
  85     return 0;
  86 }
  87
  88 # return 0 for success, 1 for failure
  89 proc setup_tracepoints { } {
  90     gdb_delete_tracepoints
  91     if [set_a_tracepoint func0] then { return 1; }
  92     if [set_a_tracepoint func1] then { return 1; }
  93     if [set_a_tracepoint func2] then { return 1; }
  94     if [set_a_tracepoint func3] then { return 1; }
  95     if [set_a_tracepoint func4] then { return 1; }
  96     if [set_a_tracepoint func5] then { return 1; }
  97     if [set_a_tracepoint func6] then { return 1; }
  98     if [set_a_tracepoint func7] then { return 1; }
  99     if [set_a_tracepoint func8] then { return 1; }
 100     if [set_a_tracepoint func9] then { return 1; }
 101     return 0;
 102 }
 103
 104 # return 0 for success, 1 for failure
 105 proc trace_buffer_normal { } {
 106     if [gdb_test "maint packet QTBuffer:size:ffffffff" \
 107             "received: .OK." ""] then {
 108         pass "This test cannot be run on this target"
 109         return 1;
 110     }
 111     if [gdb_test "maint packet QTBuffer:circular:0" \
 112             "received: .OK." ""] then {
 113         pass "This test cannot be run on this target"
 114         return 1;
 115     }
 116     return 0;
 117 }
 118
 119 # return 0 for success, 1 for failure
 120 proc gdb_trace_circular_tests { } {
 121
 122     # We generously give ourselves one "pass" if we successfully
 123     # detect that this test cannot be run on this target!
 124     if { ![gdb_target_supports_trace] } then {
 125         pass "Current target does not supporst trace"
 126         return 1;
 127     }
 128
 129     if [trace_buffer_normal] then { return 1; }
 130
 131     gdb_test "break begin" "" ""
 132     gdb_test "break end"   "" ""
 133     gdb_test "tstop"       "" ""
 134     gdb_test "tfind none"  "" ""
 135
 136     if [setup_tracepoints] then { return 1; }
 137
 138     # First, run the trace experiment with default attributes:
 139     # Make sure it behaves as expected.
 140     if [run_trace_experiment 1] then { return 1; }
 141     if [gdb_test "tfind start" \
 142             "#0  func0 .*" \
 143             "find frame zero, pass 1"] then { return 1; }
 144
 145     if [gdb_test "tfind 9" \
 146             "#0  func9 .*" \
 147             "find frame nine, pass 1"] then { return 1; }
 148
 149     if [gdb_test "tfind none" \
 150             "#0  end .*" \
 151             "quit trace debugging, pass 1"] then { return 1; }
 152
 153     # Then, shrink the trace buffer so that it will not hold
 154     # all ten trace frames.  Verify that frame zero is still
 155     # collected, but frame nine is not.
 156     if [gdb_test "maint packet QTBuffer:size:200" \
 157             "received: .OK." "shrink the target trace buffer"] then {
 158         return 1;
 159     }
 160     if [run_trace_experiment 2] then { return 1; }
 161     if [gdb_test "tfind start" \
 162             "#0  func0 .*" \
 163             "find frame zero, pass 2"] then { return 1; }
 164
 165     if [gdb_test "tfind 9" \
 166             ".* failed to find .*" \
 167             "fail to find frame nine, pass 2"] then { return 1; }
 168
 169     if [gdb_test "tfind none" \
 170             "#0  end .*" \
 171             "quit trace debugging, pass 2"] then { return 1; }
 172
 173     # Finally, make the buffer circular.  Now when it runs out of
 174     # space, it should wrap around and overwrite the earliest frames.
 175     # This means that:
 176     #   1) frame zero will be overwritten and therefore unavailable
 177     #   2) the earliest frame in the buffer will be other-than-zero
 178     #   3) frame nine will be available (unlike on pass 2).
 179     if [gdb_test "maint packet QTBuffer:circular:1" \
 180             "received: .OK." "make the target trace buffer circular"] then {
 181         return 1;
 182     }
 183     if [run_trace_experiment 3] then { return 1; }
 184     if [gdb_test "tfind start" \
 185             "#0  func\[1-9\] .*" \
 186             "first frame is NOT frame zero, pass 3"] then { return 1; }
 187
 188     if [gdb_test "tfind 9" \
 189             "#0  func9 .*" \
 190             "find frame nine, pass 3"] then { return 1; }
 191
 192     if [gdb_test "tfind none" \
 193             "#0  end .*" \
 194             "quit trace debugging, pass 3"] then { return 1; }
 195
 196     return 0;
 197 }
 198
 199 # Start with a fresh gdb.
 200
 201 gdb_exit
 202 gdb_start
 203 gdb_reinitialize_dir $srcdir/$subdir
 204 gdb_load $binfile
 205
 206 if [target_info exists gdb_stub] {
 207     gdb_step_for_stub;
 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" "" ""