gdb/testsuite/gdb.base/foll-exec-mode.exp

   1 #    Copyright 1997-2019 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 is a test of gdb's follow-exec-mode.
  17 #
  18 # It first checks that exec events are supported by using a catchpoint,
  19 # then tests multiple scenarios for follow-exec-mode using parameters
  20 # that test:
  21 # - each mode
  22 # - different commands to execute past the exec
  23 # - re-running both the original and new inferiors.
  24 #
  25 # Note that we can't single-step past an exec call.  There has to
  26 # be a breakpoint in order to stop after the exec, even if we use
  27 # a single-step command to execute past the exec.
  28
  29 # Remote mode doesn't support the 'run' command, which is
  30 # required for follow-exec-mode testing.
  31 if { [target_info exists gdb_protocol]
  32      && [target_info gdb_protocol] == "remote" } {
  33     continue
  34 }
  35
  36 # Until "catch exec" is implemented on other targets...
  37 #
  38 if {![istarget "*-linux*"]} then {
  39      continue
  40 }
  41
  42 standard_testfile foll-exec-mode.c
  43
  44 set testfile2 "execd-prog"
  45 set srcfile2 ${testfile2}.c
  46 set binfile2 [standard_output_file ${testfile2}]
  47
  48 set compile_options debug
  49
  50 # build the first test case
  51 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile2}" "${binfile2}" executable $compile_options] != "" } {
  52       untested "failed to compile"
  53       return -1
  54 }
  55
  56 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable $compile_options] != "" } {
  57       untested "failed to compile"
  58       return -1
  59 }
  60
  61 #  Test exec catchpoints to ensure exec events are supported.
  62 #
  63 proc do_catch_exec_test { } {
  64     global testfile
  65     global gdb_prompt
  66
  67     clean_restart $testfile
  68
  69     # Start the program running, and stop at main.
  70     #
  71     if ![runto_main] then {
  72         fail "couldn't run ${testfile}"
  73         return
  74     }
  75
  76     # Verify that the system supports "catch exec".
  77     gdb_test "catch exec" "Catchpoint \[0-9\]* \\(exec\\)" "insert first exec catchpoint"
  78     set has_exec_catchpoints 0
  79     gdb_test_multiple "continue" "continue to first exec catchpoint" {
  80         -re ".*Your system does not support this type\r\nof catchpoint.*$gdb_prompt $" {
  81             unsupported "continue to first exec catchpoint"
  82         }
  83         -re ".*Catchpoint.*$gdb_prompt $" {
  84             set has_exec_catchpoints 1
  85             pass "continue to first exec catchpoint"
  86         }
  87     }
  88
  89     if {$has_exec_catchpoints == 0} {
  90         unsupported "exec catchpoints"
  91         return
  92     }
  93 }
  94
  95 # Test follow-exec-mode in the specified scenario.
  96 # MODE determines whether follow-exec-mode is "same" or "new".
  97 # CMD determines the command used to execute past the exec call.
  98 # INFSWITCH is ignored for MODE == "same", and for "new" it is
  99 # used to determine whether to switch to the original inferior
 100 # before re-running.
 101
 102 proc do_follow_exec_mode_tests { mode cmd infswitch } {
 103     global binfile srcfile srcfile2 testfile testfile2
 104     global gdb_prompt
 105
 106     with_test_prefix "$mode,$cmd,$infswitch" {
 107         clean_restart $testfile
 108
 109         # Start the program running, and stop at main.
 110         #
 111         if ![runto_main] then {
 112             fail "couldn't run ${testfile}"
 113             return
 114         }
 115
 116         # Set the follow-exec mode.
 117         #
 118         gdb_test_no_output "set follow-exec-mode $mode"
 119
 120         # Run to the line of the exec call.
 121         #
 122         gdb_breakpoint [gdb_get_line_number "Set breakpoint here"]
 123         gdb_continue_to_breakpoint "continue to line of exec call"
 124
 125         # Set up the output we expect to see after we execute past the exec.
 126         #
 127         set execd_line [gdb_get_line_number "after-exec" $srcfile2]
 128         set expected_re ".*xecuting new program: .*${testfile2}.*Breakpoint .,.*${srcfile2}:${execd_line}.*$gdb_prompt $"
 129
 130         # Set a breakpoint after the exec call if we aren't single-stepping
 131         # past it.
 132         #
 133         if {$cmd == "continue"} {
 134             gdb_breakpoint "$execd_line"
 135         }
 136
 137         # Execute past the exec call.
 138         #
 139         set test "$cmd past exec"
 140         gdb_test_multiple $cmd $test {
 141             -re "$expected_re" {
 142                 pass $test
 143             }
 144         }
 145
 146         # Set expected output, given the test parameters.
 147         #
 148         if {$mode == "same"} {
 149             set expected_re "\\* 1.*process.*"
 150         } else {
 151             set expected_re "  1.*null.*$testfile.*\r\n\\* 2.*process.*$testfile2 .*"
 152         }
 153
 154         # Check that the inferior list is correct:
 155         # - one inferior for MODE == "same"
 156         # - two inferiors for MODE == "new", current is execd program
 157         #
 158         gdb_test "info inferiors" $expected_re "Check inferior list"
 159
 160         set expected_inf ""
 161         if {$mode == "same"} {
 162             # One inferior, the execd program.
 163             set expected_inf $testfile2
 164         } elseif {$infswitch == "infswitch"} {
 165             # Two inferiors, we have switched to the original program.
 166             set expected_inf $testfile
 167             gdb_test "inferior 1" "Switching to inferior 1.*$testfile.*" "switch inferiors"
 168         } else {
 169             # Two inferiors, run the execd program
 170             set expected_inf $testfile2
 171         }
 172
 173         # Now check that a 'run' command will run the correct inferior.
 174         #
 175         set test "use correct executable ($expected_inf) for run after follow exec"
 176         gdb_run_cmd
 177         gdb_test_multiple "" $test {
 178             -re {Start it from the beginning\? \(y or n\) $} {
 179                 send_gdb "y\n"
 180                 exp_continue
 181             }
 182             -re "Starting program: .*$expected_inf.*Breakpoint .,.*\r\n$gdb_prompt $" {
 183                 pass $test
 184             }
 185         }
 186     }
 187 }
 188
 189 do_catch_exec_test
 190
 191 foreach cmd {"next" "continue"} {
 192     foreach mode {"same" "new"} {
 193         # Test basic follow-exec-mode.
 194         do_follow_exec_mode_tests $mode $cmd "no_infswitch"
 195         if {$mode == "new"} {
 196             # Test that when we do 'run' we get the correct executable.
 197             do_follow_exec_mode_tests $mode $cmd "infswitch"
 198         }
 199     }
 200 }
 201
 202 return 0