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 gdb_load_shlibs $libipa
  42
  43 # Can't use prepare_for_testing, because that splits compiling into
  44 # building objects and then linking, and we'd fail with "linker input
  45 # file unused because linking not done" when building the object.
  46
  47 if { [gdb_compile "$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     setup_kfail "gdb/13808" "x86_64-*-linux*"
 134     gdb_test "print globvar" " = 1"
 135
 136     gdb_test "tfind pc *set_point" "Found trace frame .*" \
 137         "tfind set_point frame, second time"
 138
 139     setup_kfail "gdb/13808" "x86_64-*-linux*"
 140     gdb_test "print anarg" " = 200"
 141
 142     gdb_test "tfind start" "Found trace frame .*" \
 143         "reset tfinding"
 144
 145     if { $fourgood } {
 146
 147         gdb_test "tfind pc *four_byter" "Found trace frame .*" \
 148             "tfind four_byter frame, first time"
 149
 150         gdb_test "print anarg" " = 101" \
 151             "look at collected local, first time"
 152
 153         gdb_test "tfind pc *four_byter" "Found trace frame .*" \
 154             "tfind four_byter frame, second time"
 155
 156         gdb_test "print anarg" " = 201" \
 157             "look at collected local, second time"
 158
 159     }
 160
 161     # If debugging with the remote target, try force disabling the
 162     # fast tracepoints RSP feature, and confirm fast tracepoints
 163     # can no longer be downloaded.
 164     set test "fast tracepoint could not be downloaded with the feature disabled"
 165     if [gdb_is_target_remote] {
 166         gdb_test "set remote fast-tracepoints-packet off"
 167
 168         gdb_test_multiple "tstart" $test {
 169             -re "warning: Target does not support fast tracepoints, downloading .* as regular tracepoint.*\r\n$gdb_prompt $" {
 170                 pass $test
 171             }
 172         }
 173     } else {
 174         unsupported $test
 175     }
 176 }
 177
 178 # Test compiled-condition
 179 # CONDEXP is the condition expression to be compiled.
 180 # VAR is the variable to be collected for testing.
 181 # LIST is a list of expected values of VAR should be collected
 182 # based on the CONDEXP.
 183 proc test_ftrace_condition { condexp var list } \
 184 { with_test_prefix "ond $condexp" \
 185 {
 186     global executable
 187     global hex
 188
 189     clean_restart ${executable}
 190     if ![runto_main] {
 191         fail "Can't run to main to check for trace support"
 192         return -1
 193     }
 194
 195     gdb_test "break end" ".*" ""
 196     gdb_test "tvariable \$tsv = 0"
 197     gdb_test "ftrace set_point if $condexp" "Fast tracepoint .*"
 198     gdb_trace_setactions "set action for tracepoint .*" "" \
 199         "collect $var" "^$"
 200
 201     gdb_test_no_output "tstart" ""
 202     gdb_test "continue" \
 203         "Continuing\\.\[ \r\n\]+(Thread .* hit )?Breakpoint.*" ""
 204     gdb_test_no_output "tstop" ""
 205
 206     set i 0
 207     foreach expval $list {
 208         gdb_test "tfind" "Found trace frame $i, tracepoint .*" "tfind frame $i"
 209         gdb_test "print $var" "\\$\[0-9\]+ = $expval\[\r\n\]" "expect $expval"
 210         set i [expr $i + 1]
 211     }
 212     gdb_test "tfind" "Target failed to find requested trace frame\."
 213 }}
 214
 215 gdb_reinitialize_dir $srcdir/$subdir
 216
 217 if { [gdb_test "info sharedlibrary" ".*${libipa}.*" "IPA loaded"] != 0 } {
 218     untested "Could not find IPA lib loaded"
 219     return 1
 220 }
 221
 222 test_fast_tracepoints
 223
 224 # Test conditional goto and simple expression.
 225 test_ftrace_condition "globvar > 7" "globvar" { 8 9 10 }
 226 test_ftrace_condition "globvar < 4" "globvar" { 1 2 3 }
 227 test_ftrace_condition "globvar >= 7" "globvar" { 7 8 9 10 }
 228 test_ftrace_condition "globvar <= 4" "globvar" { 1 2 3 4 }
 229 test_ftrace_condition "globvar == 5" "globvar" { 5 }
 230 test_ftrace_condition "globvar != 5" "globvar" { 1 2 3 4 6 7 8 9 10 }
 231 test_ftrace_condition "globvar > 3 && globvar < 7" "globvar" { 4 5 6 }
 232 test_ftrace_condition "globvar < 3 || globvar > 7" "globvar" { 1 2 8 9 10 }
 233 test_ftrace_condition "(globvar << 2) + 1 == 29" "globvar" { 7 }
 234 test_ftrace_condition "(globvar >> 2) == 2" "globvar" { 8 9 10 }
 235
 236 # Test emit_call by accessing trace state variables.
 237 test_ftrace_condition "(\$tsv = \$tsv + 2) > 10" "globvar" { 6 7 8 9 10 }
 238
 239 # This expression is used for testing emit_reg.
 240 if [is_amd64_regs_target] {
 241     set arg0exp "\$rdi"
 242 } elseif [is_x86_like_target] {
 243     set arg0exp "*(int *) (\$ebp + 8)"
 244 } elseif { [istarget "aarch64*-*-*"] } {
 245     set arg0exp "\$x0"
 246 } else {
 247     set arg0exp ""
 248 }
 249
 250 if { "$arg0exp" != "" } {
 251     test_ftrace_condition "($arg0exp > 500)" "globvar" { 6 7 8 9 10 }
 252 }