gdb/testsuite/gdb.trace/ftrace.exp

   1 # Copyright 2011-2016 Free Software Foundation, Inc.
   2 # This program is free software; you can redistribute it and/or modify
   3 # it under the terms of the GNU General Public License as published by
   4 # the Free Software Foundation; either version 3 of the License, or
   5 # (at your option) any later version.
   6 #
   7 # This program is distributed in the hope that it will be useful,
   8 # but WITHOUT ANY WARRANTY; without even the implied warranty of
   9 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10 # GNU General Public License for more details.
  11 #
  12 # You should have received a copy of the GNU General Public License
  13 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  14
  15 load_lib "trace-support.exp"
  16
  17 standard_testfile
  18 set executable $testfile
  19 set expfile $testfile.exp
  20
  21 # Some targets have leading underscores on assembly symbols.
  22 set additional_flags [gdb_target_symbol_prefix_flags]
  23
  24 if [prepare_for_testing "failed to prepare" $executable $srcfile \
  25         [list debug $additional_flags]] {
  26     return -1
  27 }
  28
  29 if ![runto_main] {
  30     fail "can't run to main to check for trace support"
  31     return -1
  32 }
  33
  34 if ![gdb_target_supports_trace] {
  35     unsupported "target does not support trace"
  36     return -1
  37 }
  38
  39 set libipa [get_in_proc_agent]
  40 set remote_libipa [gdb_load_shlib $libipa]
  41
  42 # Can't use prepare_for_testing, because that splits compiling into
  43 # building objects and then linking, and we'd fail with "linker input
  44 # file unused because linking not done" when building the object.
  45
  46 if { [gdb_compile "$srcdir/$subdir/$srcfile" $binfile \
  47           executable [list debug $additional_flags shlib=$libipa] ] != "" } {
  48     untested "failed to compile"
  49     return -1
  50 }
  51 clean_restart ${executable}
  52
  53 if ![runto_main] {
  54     fail "can't run to main for ftrace tests"
  55     return 0
  56 }
  57
  58 proc run_trace_experiment {} {
  59
  60     gdb_test "continue" \
  61         ".*Breakpoint \[0-9\]+, begin .*" \
  62         "advance to trace begin"
  63
  64     gdb_test_no_output "tstart" "start trace experiment"
  65
  66     gdb_test "continue" \
  67         ".*Breakpoint \[0-9\]+, end .*" \
  68         "advance through tracing"
  69
  70     gdb_test "tstatus" ".*Trace .*" "check on trace status"
  71
  72     gdb_test "tstop" "" ""
  73 }
  74
  75 proc test_fast_tracepoints {} {
  76     global gdb_prompt
  77
  78     set fourgood 0
  79
  80     gdb_test "break begin" ".*" ""
  81
  82     gdb_test "break end" ".*" ""
  83
  84     gdb_test "print gdb_agent_gdb_trampoline_buffer_error" ".*" ""
  85
  86     gdb_test "ftrace set_point" "Fast tracepoint .*" \
  87         "fast tracepoint at a long insn"
  88
  89     gdb_trace_setactions "collect at set_point: define actions" \
  90         "" \
  91         "collect globvar, anarg" "^$"
  92
  93     # Make a test of shorter fast tracepoints, 32-bit x86 only
  94
  95     if { [istarget "i?86-*-*"] } {
  96
  97         # A Linux target needs to be able to allocate trampolines in the
  98         # 16-bit range, check mmap_min_addr so we can warn testers.
  99         if { [istarget "i?86-*-linux*"] } {
 100
 101             set minaddr [exec sh -c "cat /proc/sys/vm/mmap_min_addr"]
 102
 103             if { [expr $minaddr > 64512] } {
 104                 warning "mmap_min_addr > 64512, fast tracepoint will fail"
 105                 warning "do \"sudo sysctl -w vm.mmap_min_addr=32768\" to adjust"
 106             }
 107         }
 108
 109         gdb_test_multiple "ftrace four_byter" "set 4-byte fast tracepoint" {
 110             -re "May not have a fast tracepoint at .*\r\n$gdb_prompt $" {
 111                 pass "4-byte fast tracepoint could not be set"
 112             }
 113             -re "Fast tracepoint .*\r\n$gdb_prompt $" {
 114                 pass "4-byte fast tracepoint is set"
 115                 set fourgood 1
 116             }
 117         }
 118
 119         if { $fourgood } {
 120
 121             gdb_trace_setactions "collect at four_byter: define actions" \
 122             "" \
 123             "collect globvar, anarg" "^$"
 124         }
 125     }
 126
 127     run_trace_experiment
 128
 129     gdb_test "tfind pc *set_point" "Found trace frame .*" \
 130         "tfind set_point frame, first time"
 131
 132     gdb_test "print globvar" " = 1"
 133
 134     gdb_test "tfind pc *set_point" "Found trace frame .*" \
 135         "tfind set_point frame, second time"
 136
 137     setup_kfail "gdb/13808" "x86_64-*-linux*"
 138     gdb_test "print anarg" " = 200"
 139
 140     gdb_test "tfind start" "Found trace frame .*" \
 141         "reset tfinding"
 142
 143     if { $fourgood } {
 144
 145         gdb_test "tfind pc *four_byter" "Found trace frame .*" \
 146             "tfind four_byter frame, first time"
 147
 148         gdb_test "print anarg" " = 101" \
 149             "look at collected local, first time"
 150
 151         gdb_test "tfind pc *four_byter" "Found trace frame .*" \
 152             "tfind four_byter frame, second time"
 153
 154         gdb_test "print anarg" " = 201" \
 155             "look at collected local, second time"
 156
 157     }
 158
 159     # If debugging with the remote target, try force disabling the
 160     # fast tracepoints RSP feature, and confirm fast tracepoints
 161     # can no longer be downloaded.
 162     set test "fast tracepoint could not be downloaded with the feature disabled"
 163     if [gdb_is_target_remote] {
 164         gdb_test "set remote fast-tracepoints-packet off"
 165
 166         gdb_test_multiple "tstart" $test {
 167             -re "warning: Target does not support fast tracepoints, downloading .* as regular tracepoint.*\r\n$gdb_prompt $" {
 168                 pass $test
 169             }
 170         }
 171     } else {
 172         unsupported $test
 173     }
 174 }
 175
 176 gdb_reinitialize_dir $srcdir/$subdir
 177
 178 if { [gdb_test "info sharedlibrary" ".*${remote_libipa}.*" "IPA loaded"] != 0 } {
 179     untested "could not find IPA lib loaded"
 180     return 1
 181 }
 182
 183 test_fast_tracepoints