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 $expfile $executable $srcfile \
  25         [list debug $additional_flags]] {
  26     untested "failed to prepare for trace tests"
  27     return -1
  28 }
  29
  30 if ![runto_main] {
  31     fail "can't run to main to check for trace support"
  32     return -1
  33 }
  34
  35 if ![gdb_target_supports_trace] {
  36     unsupported "target does not support trace"
  37     return -1
  38 }
  39
  40 set libipa [get_in_proc_agent]
  41 set remote_libipa [gdb_load_shlib $libipa]
  42
  43 # Can't use prepare_for_testing, because that splits compiling into
  44 # building objects and then linking, and we'd fail with "linker input
  45 # file unused because linking not done" when building the object.
  46
  47 if { [gdb_compile "$srcdir/$subdir/$srcfile" $binfile \
  48           executable [list debug $additional_flags shlib=$libipa] ] != "" } {
  49     untested "failed to compile ftrace tests"
  50     return -1
  51 }
  52 clean_restart ${executable}
  53
  54 if ![runto_main] {
  55     fail "can't run to main for ftrace tests"
  56     return 0
  57 }
  58
  59 proc run_trace_experiment {} {
  60
  61     gdb_test "continue" \
  62         ".*Breakpoint \[0-9\]+, begin .*" \
  63         "advance to trace begin"
  64
  65     gdb_test_no_output "tstart" "start trace experiment"
  66
  67     gdb_test "continue" \
  68         ".*Breakpoint \[0-9\]+, end .*" \
  69         "advance through tracing"
  70
  71     gdb_test "tstatus" ".*Trace .*" "check on trace status"
  72
  73     gdb_test "tstop" "" ""
  74 }
  75
  76 proc test_fast_tracepoints {} {
  77     global gdb_prompt
  78
  79     set fourgood 0
  80
  81     gdb_test "break begin" ".*" ""
  82
  83     gdb_test "break end" ".*" ""
  84
  85     gdb_test "print gdb_agent_gdb_trampoline_buffer_error" ".*" ""
  86
  87     gdb_test "ftrace set_point" "Fast tracepoint .*" \
  88         "fast tracepoint at a long insn"
  89
  90     gdb_trace_setactions "collect at set_point: define actions" \
  91         "" \
  92         "collect globvar, anarg" "^$"
  93
  94     # Make a test of shorter fast tracepoints, 32-bit x86 only
  95
  96     if { [istarget "i?86-*-*"] } {
  97
  98         # A Linux target needs to be able to allocate trampolines in the
  99         # 16-bit range, check mmap_min_addr so we can warn testers.
 100         if { [istarget "i?86-*-linux*"] } {
 101
 102             set minaddr [exec sh -c "cat /proc/sys/vm/mmap_min_addr"]
 103
 104             if { [expr $minaddr > 64512] } {
 105                 warning "mmap_min_addr > 64512, fast tracepoint will fail"
 106                 warning "do \"sudo sysctl -w vm.mmap_min_addr=32768\" to adjust"
 107             }
 108         }
 109
 110         gdb_test_multiple "ftrace four_byter" "set 4-byte fast tracepoint" {
 111             -re "May not have a fast tracepoint at .*\r\n$gdb_prompt $" {
 112                 pass "4-byte fast tracepoint could not be set"
 113             }
 114             -re "Fast tracepoint .*\r\n$gdb_prompt $" {
 115                 pass "4-byte fast tracepoint is set"
 116                 set fourgood 1
 117             }
 118         }
 119
 120         if { $fourgood } {
 121
 122             gdb_trace_setactions "collect at four_byter: define actions" \
 123             "" \
 124             "collect globvar, anarg" "^$"
 125         }
 126     }
 127
 128     run_trace_experiment
 129
 130     gdb_test "tfind pc *set_point" "Found trace frame .*" \
 131         "tfind set_point frame, first time"
 132
 133     gdb_test "print globvar" " = 1"
 134
 135     gdb_test "tfind pc *set_point" "Found trace frame .*" \
 136         "tfind set_point frame, second time"
 137
 138     setup_kfail "gdb/13808" "x86_64-*-linux*"
 139     gdb_test "print anarg" " = 200"
 140
 141     gdb_test "tfind start" "Found trace frame .*" \
 142         "reset tfinding"
 143
 144     if { $fourgood } {
 145
 146         gdb_test "tfind pc *four_byter" "Found trace frame .*" \
 147             "tfind four_byter frame, first time"
 148
 149         gdb_test "print anarg" " = 101" \
 150             "look at collected local, first time"
 151
 152         gdb_test "tfind pc *four_byter" "Found trace frame .*" \
 153             "tfind four_byter frame, second time"
 154
 155         gdb_test "print anarg" " = 201" \
 156             "look at collected local, second time"
 157
 158     }
 159
 160     # If debugging with the remote target, try force disabling the
 161     # fast tracepoints RSP feature, and confirm fast tracepoints
 162     # can no longer be downloaded.
 163     set test "fast tracepoint could not be downloaded with the feature disabled"
 164     if [gdb_is_target_remote] {
 165         gdb_test "set remote fast-tracepoints-packet off"
 166
 167         gdb_test_multiple "tstart" $test {
 168             -re "warning: Target does not support fast tracepoints, downloading .* as regular tracepoint.*\r\n$gdb_prompt $" {
 169                 pass $test
 170             }
 171         }
 172     } else {
 173         unsupported $test
 174     }
 175 }
 176
 177 gdb_reinitialize_dir $srcdir/$subdir
 178
 179 if { [gdb_test "info sharedlibrary" ".*${remote_libipa}.*" "IPA loaded"] != 0 } {
 180     untested "could not find IPA lib loaded"
 181     return 1
 182 }
 183
 184 test_fast_tracepoints