gdb/testsuite/gdb.trace/circ.exp

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