gdb/testsuite/gdb.trace/qtro.exp

   1 #   Copyright 1998-2014 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 # This test helps making sure QTro support doesn't regress.  If the
  17 # stub supports the newer qXfer:traceframe-info:read, then the QTro
  18 # paths in the stub are never exercised.  PR remote/15455 is an
  19 # example of a regression that unfortunately went unnoticed for long.
  20
  21 load_lib trace-support.exp
  22
  23 standard_testfile
  24
  25 if {[prepare_for_testing $testfile.exp $testfile $srcfile debug]} {
  26     return -1
  27 }
  28 clean_restart $testfile
  29
  30 if ![runto_main] {
  31     fail "Can't run to main to check for trace support"
  32     return -1
  33 }
  34
  35 # Check whether we're testing with the remote or extended-remote
  36 # targets, and whether the target supports tracepoints.
  37
  38 if ![gdb_is_target_remote] {
  39     return -1
  40 }
  41
  42 if ![gdb_target_supports_trace] {
  43     unsupported "Current target does not support trace"
  44     return -1
  45 }
  46
  47 # Run a trace session, stop it, and then inspect the resulting trace
  48 # frame (IOW, returns while tfind mode is active).
  49 proc prepare_for_trace_disassembly { } {
  50     global gdb_prompt
  51     gdb_breakpoint "end"
  52
  53     gdb_test "trace subr" "Tracepoint .*" \
  54         "tracepoint at subr"
  55
  56     gdb_trace_setactions "define action" \
  57         "" \
  58         "collect parm" "^$"
  59
  60     gdb_test_no_output "tstart"
  61
  62     gdb_test "continue" ".*Breakpoint \[0-9\]+, end .*" \
  63         "advance through tracing"
  64
  65     gdb_test "tstatus" ".*Collected 1 trace frame.*" \
  66         "collected 1 trace frame"
  67
  68     gdb_test_no_output "tstop"
  69
  70     gdb_tfind_test "tfind start" "start" "0"
  71 }
  72
  73 clean_restart $testfile
  74 runto_main
  75
  76 # Trace once, issuing a tstatus, so that GDB tries
  77 # qXfer:trace-frame-info:read.
  78 prepare_for_trace_disassembly
  79
  80 # Now check whether the packet is supported.
  81 set traceframe_info_supported -1
  82 set test "probe for traceframe-info support"
  83 gdb_test_multiple "show remote traceframe-info-packet" $test {
  84     -re ".*Support for .* is auto-detected, currently (\[a-z\]*).*$gdb_prompt $" {
  85         set status $expect_out(1,string)
  86
  87         if { $status == "enabled" } {
  88             set traceframe_info_supported 1
  89         } else {
  90             set traceframe_info_supported 0
  91         }
  92
  93         pass $test
  94     }
  95 }
  96 if { $traceframe_info_supported == -1 } {
  97     return -1
  98 }
  99
 100 # Check whether we're testing with our own GDBserver.
 101 set is_gdbserver -1
 102 set test "probe for GDBserver"
 103 gdb_test_multiple "monitor help" $test {
 104     -re "The following monitor commands are supported.*debug-hw-points.*remote-debug.*GDBserver.*$gdb_prompt $" {
 105         set is_gdbserver 1
 106         pass $test
 107     }
 108     -re "$gdb_prompt $" {
 109         set is_gdbserver 0
 110         pass $test
 111     }
 112 }
 113 if { $is_gdbserver == -1 } {
 114     return -1
 115 }
 116
 117 # Now disassemble (IOW, read from read-only memory) while inspecting a
 118 # trace frame, twice.  Once with qXfer:traceframe-info:read left to
 119 # auto, and once with it disabled, exercising the QTro fallback path
 120 # in the stub side.
 121 foreach tfinfo { auto off } {
 122     with_test_prefix "qXfer:traceframe-info:read $tfinfo" {
 123
 124         clean_restart $testfile
 125         runto_main
 126         gdb_test_no_output "set remote traceframe-info-packet $tfinfo"
 127
 128         prepare_for_trace_disassembly
 129
 130         set test "trace disassembly"
 131         gdb_test_multiple "disassemble subr" $test {
 132             -re "<(\.\[0-9\]+|)>:.*End of assembler dump.*$gdb_prompt $" {
 133                 pass $test
 134             }
 135             -re "Cannot access memory.*$gdb_prompt $" {
 136                 if { $traceframe_info_supported == 0 } {
 137                     # If qXfer:traceframe-info:read is not supported,
 138                     # then there should be QTro support.
 139                     fail $test
 140                 } elseif { $tfinfo == off && $is_gdbserver == 1 } {
 141                     # We we're testing with GDBserver, we know both
 142                     # qXfer:traceframe-info:read and QTro are
 143                     # supported (although supporting the former only
 144                     # would be sufficient), so issue a FAIL instead of
 145                     # UNSUPPORTED, giving us better visibility of QTro
 146                     # regressions.
 147                     fail $test
 148                 } else {
 149                     # Otherwise, qXfer:traceframe-info:read is
 150                     # supported, making QTro optional, so this isn't
 151                     # really a failure.
 152                     unsupported "$test (no QTro support)"
 153                 }
 154             }
 155         }
 156     }
 157 }