gdb/testsuite/gdb.base/signals.exp

   1 # Copyright 1997-2020 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 if [target_info exists gdb,nosignals] {
  17     verbose "Skipping signals.exp because of nosignals."
  18     continue
  19 }
  20
  21
  22 standard_testfile .c
  23
  24 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  25     untested "failed to compile"
  26     return -1
  27 }
  28
  29 # Create and source the file that provides information about the compiler
  30 # used to compile the test case.
  31 if [get_compiler_info] {
  32     return -1
  33 }
  34
  35 gdb_exit
  36 gdb_start
  37
  38 # This will need to be updated as the exact list of signals changes,
  39 # but I want to test that GDB_SIGNAL_0, GDB_SIGNAL_DEFAULT, and
  40 # GDB_SIGNAL_UNKNOWN are skipped.
  41
  42 proc test_handle_all_print {} {
  43     global timeout
  44     # Increase timeout and expect input buffer for large output from gdb.
  45     # Allow blank or TAB as whitespace characters.
  46     set oldtimeout $timeout
  47     set timeout [expr "$timeout + 60"]
  48     verbose "Timeout is now $timeout seconds" 2
  49     if { ![istarget "*-*-linux*"]
  50          && ( [istarget "*-*-gnu*"]
  51               || [istarget "*-*-mach*"] ) } {
  52         gdb_test_sequence "handle all print" "" \
  53             {
  54                 "Signal\[       \]+Stop\[       \]+Print\[      \]+Pass to program\[    \]+Description\r\nSIGHUP\[      \]+Yes\[        \]+Yes\[        \]+Yes\[        \]+Hangup"
  55                 "SIG63\[        \]+Yes\[        \]+Yes\[        \]+Yes\[        \]+Real-time event 63"
  56                 "EXC_BREAKPOINT\[       \]+Yes\[        \]+Yes\[        \]+Yes\[        \]+Breakpoint"
  57             }
  58     } else {
  59         gdb_test_sequence "handle all print" "" \
  60             {
  61                 "Signal\[       \]+Stop\[       \]+Print\[      \]+Pass to program\[    \]+Description\r\nSIGHUP\[      \]+Yes\[        \]+Yes\[        \]+Yes\[        \]+Hangup"
  62                 "SIG63\[        \]+Yes\[        \]+Yes\[        \]+Yes\[        \]+Real-time event 63"
  63             }
  64     }
  65     set timeout $oldtimeout
  66     verbose "Timeout restored to $timeout seconds" 2
  67 }
  68 test_handle_all_print
  69
  70 clean_restart $binfile
  71
  72 if [runto_main] then {
  73
  74     # Since count is a static variable outside main, runto_main is no
  75     # guarantee that count will be 0 at this point.
  76
  77     gdb_test_no_output "set variable count = 0"
  78
  79     # Test an inferior function call that takes a signal that hits a
  80     # breakpoint (with a false condition).  When GDB tries to run the
  81     # stack dummy, it will hit the breakpoint at handler.  Provided it
  82     # doesn't lose its cool, this is not a problem, it just has to
  83     # note that the breakpoint condition is false and keep going.
  84
  85     # ...setup an always false conditional breakpoint
  86
  87     gdb_test "break handler if 0" "Breakpoint \[0-9\]+ .*"
  88     gdb_test_no_output "set \$handler_breakpoint_number = \$bpnum"
  89
  90     # ...setup the signal
  91
  92     gdb_test "next" "signal \\(SIGUSR1.*" "next to signal"
  93     gdb_test "next" "alarm \\(.*" "next to alarm #1"
  94     gdb_test "next" "\\+\\+count; /\\* first \\*/" \
  95         "next to ++count #1"
  96     sleep 2
  97
  98     # ...call the function
  99
 100     gdb_test "p func1 ()" "^p func1 \\(\\)\r\n.\[0-9\]* = void" \
 101         "p func1 () #1"
 102
 103     # ...veryfiy that the cout was updated
 104
 105     gdb_test "p count" "= 2" "p count #1"
 106
 107     # Now run the same test but with a breakpoint that does stop.
 108
 109     # ...set up the breakpoint and signal
 110
 111     gdb_test "condition \$handler_breakpoint_number" "now unconditional\\."
 112     gdb_test "next" "alarm \\(.*" "next to alarm #2"
 113     gdb_test "next" "\\+\\+count; /\\* second \\*/" \
 114         "next to ++count #2"
 115     sleep 2
 116
 117     # ...call the function, which is immediatly interrupted
 118
 119     gdb_test "p func1 ()" \
 120 "Breakpoint \[0-9\]*, handler.*
 121 The program being debugged stopped while in a function called from GDB.*" \
 122         "p func1 () #2"
 123
 124     # ...verify the backtrace
 125
 126     gdb_test "backtrace" \
 127         "#0  handler.*#1  .signal handler called.*#2  func1.*#3  .function called from gdb.*#4.*main.*" \
 128         "backtrace from handler when calling func1"
 129
 130     # ...and continue (silently returning)
 131
 132     gdb_test "continue" "Continuing\\."
 133
 134     # ...and then count should have been incremented
 135
 136     gdb_test "p count" "= 5" "p count #2"
 137
 138
 139     # Verify that "info signals" produces reasonable output.
 140
 141     gdb_test_sequence "info signals" "" \
 142         [list "SIGHUP" "SIGINT" "SIGQUIT" "SIGILL" "SIGTRAP" "SIGABRT" \
 143              "SIGEMT" "SIGFPE" "SIGKILL" "SIGBUS" "SIGSEGV" "SIGSYS" \
 144              "SIGPIPE" "SIGALRM" "SIGTERM" "SIGURG" "SIGSTOP" \
 145              "SIGTSTP" "SIGCONT" "SIGCHLD" "SIGTTIN" "SIGTTOU" "SIGIO" \
 146              "SIGXCPU" "SIGXFSZ" "SIGVTALRM" "SIGPROF" "SIGWINCH" \
 147              "SIGLOST" "SIGUSR1" "SIGUSR2" "SIGPWR" "SIGPOLL" \
 148              "SIGWIND" "SIGPHONE" "SIGWAITING" "SIGLWP" "SIGDANGER" \
 149              "SIGGRANT" "SIGRETRACT" "SIGMSG" "SIGSOUND" "SIGSAK" \
 150              "SIGPRIO" "SIG33" "SIG34" "SIG35" "SIG36" "SIG37" "SIG38" \
 151              "SIG39" "SIG40" "SIG41" "SIG42" "SIG43" "SIG44" "SIG45" \
 152              "SIG46" "SIG47" "SIG48" "SIG49" "SIG50" "SIG51" "SIG52" \
 153              "SIG53" "SIG54" "SIG55" "SIG56" "SIG57" "SIG58" "SIG59" \
 154              "SIG60" "SIG61" "SIG62" "SIG63" \
 155              "Use the \"handle\" command to change these tables"]
 156
 157     # Verify that "info signal" correctly handles an argument, be it a
 158     # symbolic signal name, or an integer ID.
 159
 160     gdb_test "info signal SIGTRAP" \
 161         "SIGTRAP\[ \t\]*Yes\[ \t\]*Yes\[ \t\]*No\[ \t\]*Trace/breakpoint trap.*"
 162
 163     gdb_test "info signal 5" \
 164         "SIGTRAP\[ \t\]*Yes\[ \t\]*Yes\[ \t\]*No\[ \t\]*Trace/breakpoint trap.*"
 165
 166     # Verify that "handle" with illegal arguments is gracefully, um,
 167     # handled.
 168
 169     gdb_test "handle" \
 170         "Argument required .signal to handle.*" \
 171         "handle without arguments"
 172
 173     gdb_test "handle SIGFOO" \
 174         "Unrecognized or ambiguous flag word: \"SIGFOO\".*" \
 175         "handle with bogus SIG"
 176
 177     gdb_test "handle SIGHUP frump" \
 178         "Unrecognized or ambiguous flag word: \"frump\".*" \
 179         "handle SIG with bogus action"
 180
 181     # Verify that "handle" can take multiple actions per SIG, and that
 182     # in the case of conflicting actions, that the rightmost action
 183     # "wins".
 184
 185     gdb_test "handle SIGHUP print noprint" \
 186         "SIGHUP\[ \t\]*No\[ \t\]*No\[ \t\]*Yes\[ \t\]*Hangup.*" \
 187         "handle SIG with multiple conflicting actions"
 188
 189     # Exercise all the various actions.  (We don't care what the
 190     # outcome is, this is just to ensure that they all can be parsed.)
 191
 192     gdb_test "handle SIGHUP print noprint stop nostop ignore noignore pass nopass" \
 193         "Signal.*" \
 194         "handle SIG parses all legal actions"
 195
 196     # Verify that we can "handle" multiple signals at once,
 197     # interspersed with actions.
 198
 199     gdb_test "handle SIG63 print SIGILL" \
 200         "SIGILL\[ \t\]*Yes\[ \t\]*Yes\[ \t\]*Yes\[ \t\]*Illegal instruction.*SIG63\[ \t\]*Yes\[ \t\]*Yes\[ \t\]*Yes\[ \t\]*Real-time event 63.*" \
 201         "handle multiple SIGs"
 202
 203     # Verify that "handle" can take a numeric argument for the signal
 204     # ID, rather than a symbolic name.  (This may not be portable;
 205     # works for HP-UX.)
 206
 207     # Also note that this testpoint overrides SIGTRAP, which on HP-UX
 208     # at least, is used to implement single-steps and breakpoints.
 209     # Don't expect to run the inferior after this!
 210
 211     set test "override SIGTRAP"
 212     gdb_test_multiple "handle 5 nopass" "$test" {
 213         -re "SIGTRAP is used by the debugger.*Are you sure you want to change it.*y or n.*" {
 214             gdb_test "y" \
 215                 "SIGTRAP\[ \t\]*Yes\[ \t\]*Yes\[ \t\]*No\[ \t\]*Trace/breakpoint trap.*" \
 216                 "$test"
 217         }
 218     }
 219
 220     # GDB doesn't seem to allow numeric signal IDs larger than 15.  Verify
 221     # that restriction.  ??rehrauer: Not sure if this is a feature or a
 222     # bug, actually.  Why is the range 1-15?
 223
 224     gdb_test "handle 58" \
 225         "Only signals 1-15 are valid as numeric signals.*Use \"info signals\" for a list of symbolic signals.*" \
 226         "invalid signal number rejected"
 227
 228     # Verify that we can accept a signal ID range (number-number).
 229     # ??rehrauer: This feature isn't documented on the quick-reference
 230     # card.
 231
 232     gdb_test "handle 13-15" \
 233         "SIGPIPE.*SIGALRM.*SIGTERM.*" \
 234         "handle multiple SIGs via integer range"
 235
 236     # Bizarrely enough, GDB also allows you to reverse the range stat,
 237     # stop IDs.  E.g., "3-1" and "1-3" mean the same thing.  Probably
 238     # this isn't documented, but the code anticipates it, so we'd best
 239     # test it...
 240
 241     gdb_test "handle 15-13" \
 242         "SIGPIPE.*SIGALRM.*SIGTERM.*" \
 243         "handle multiple SIGs via reverse integer range"
 244
 245     # SIGINT is used by the debugger as well.  Verify that we can
 246     # change our minds about changing it.
 247
 248     set test "override SIGINT"
 249     gdb_test_multiple "handle SIGINT nopass" "$test" {
 250         -re "SIGINT is used by the debugger.*Are you sure you want to change it.*y or n.*" {
 251             gdb_test_multiple "n" "$test" {
 252                 -re "Not confirmed, unchanged.*Signal.*$gdb_prompt $"  {
 253                     # "Signal ..." should not be in the output.
 254                     fail gdb/8812 "$test"
 255                 }
 256                 -re "Not confirmed, unchanged.*$gdb_prompt $" {
 257                     pass "$test"
 258                 }
 259             }
 260         }
 261     }
 262
 263     # Verify that GDB responds gracefully to the "signal" command with
 264     # a missing argument.
 265
 266     gdb_test "signal" \
 267         "Argument required .signal number..*" \
 268         "signal without arguments disallowed"
 269
 270     # Verify that we can successfully send a signal other than 0 to
 271     # the inferior.  (This probably causes the inferior to run away.
 272     # Be prepared to rerun to main for further testing.)
 273
 274     gdb_test "signal SIGUSR1" "Breakpoint.*handler.*"
 275     gdb_test "bt" \
 276         "#0  handler .*#1  .signal handler called.*\#2 .*main.*" \
 277         "backtrace for SIGUSR1"
 278 }
 279
 280 return 0