gdb/testsuite/gdb.base/siginfo-obj.exp

   1 # Copyright 2004-2020 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
  17 # The program siginfo-obj.c arranges for a signal handler registered
  18 # using sigaction's sa_sigaction / SA_SIGINFO to be called with
  19 # si_addr filled in.
  20
  21 # This test confirms that we can inspect signal info using the
  22 # $_siginfo convenience variable.
  23
  24 if [target_info exists gdb,nosignals] {
  25     verbose "Skipping siginfo-obj.exp because of nosignals."
  26     continue
  27 }
  28
  29 if { ![supports_get_siginfo_type] } {
  30     verbose "Skipping siginfo-obj.exp because of lack of support."
  31     return
  32 }
  33
  34
  35 standard_testfile
  36
  37 if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} {
  38     return -1
  39 }
  40
  41 # Advance to main
  42 if ![runto_main] then {
  43     fail "can't run to main"
  44     return 0
  45 }
  46
  47 # Run to the signal.
  48 gdb_test "continue" ".*Program received signal SIGSEGV.*" \
  49          "continue to signal, 1st"
  50
  51 # Try to generate a core file, for a later test.
  52 set gcorefile [standard_output_file $testfile.gcore]
  53 set gcore_created [gdb_gcore_cmd $gcorefile "save a core file"]
  54
  55 set ssi_addr ""
  56 set test "extract si_addr"
  57 gdb_test_multiple "p \$_siginfo" "$test" {
  58     -re "si_addr = ($hex).*$gdb_prompt $" {
  59         set ssi_addr $expect_out(1,string)
  60         pass "$test"
  61     }
  62 }
  63
  64 set test "extract si_errno"
  65 gdb_test_multiple "p \$_siginfo" "$test" {
  66     -re "si_errno = (\[0-9\]\+).*$gdb_prompt $" {
  67         set ssi_errno $expect_out(1,string)
  68         pass "$test"
  69     }
  70 }
  71
  72 set test "extract si_code"
  73 gdb_test_multiple "p \$_siginfo" "$test" {
  74     -re "si_code = (\[0-9\]\+).*$gdb_prompt $" {
  75         set ssi_code $expect_out(1,string)
  76         pass "$test"
  77     }
  78 }
  79
  80 set test "extract si_signo"
  81 gdb_test_multiple "p \$_siginfo" "$test" {
  82     -re "si_signo = (\[0-9\]\+).*$gdb_prompt $" {
  83         set ssi_signo $expect_out(1,string)
  84         pass "$test"
  85     }
  86 }
  87
  88 set bp_location [gdb_get_line_number "set breakpoint here"]
  89
  90 with_test_prefix "validate siginfo fields" {
  91     gdb_test "break $bp_location"
  92     gdb_test "continue" ".* handler .*" "continue to handler"
  93     gdb_test "p ssi_addr" " = \\(void \\*\\) $ssi_addr"
  94     gdb_test "p ssi_errno" " = $ssi_errno"
  95     gdb_test "p ssi_code" " = $ssi_code"
  96     gdb_test "p ssi_signo" " = $ssi_signo"
  97 }
  98
  99 # Again, but this time, patch si_addr and check that the inferior sees
 100 # the changed value.
 101
 102 # Advance to main
 103 if ![runto_main] then {
 104     fail "can't run to main"
 105     return 0
 106 }
 107
 108 # Run to the signal.
 109 gdb_test "continue" ".*Program received signal SIGSEGV.*" \
 110          "continue to signal, 2nd"
 111
 112 set test "set si_addr"
 113 gdb_test "p \$_siginfo._sifields._sigfault.si_addr = 0x666" " = \\(void \\*\\) 0x666"
 114 gdb_test "p \$_siginfo.si_errno = 666" " = 666"
 115 gdb_test "p \$_siginfo.si_code = 999" " = 999"
 116 gdb_test "p \$_siginfo.si_signo = 11" " = 11"
 117
 118 with_test_prefix "validate modified siginfo fields" {
 119     gdb_test "break $bp_location"
 120     gdb_test "continue" ".* handler .*" "continue to handler"
 121     gdb_test "p ssi_addr" " = \\(void \\*\\) 0x666"
 122     gdb_test "p ssi_errno" " = 666"
 123     gdb_test "p ssi_code" " = 999"
 124     gdb_test "p ssi_signo" " = 11"
 125 }
 126
 127 # Test siginfo preservation in core files.
 128 if {$gcore_created} {
 129     clean_restart $binfile
 130
 131     gdb_test "core $gcorefile" "Core was generated by.*" \
 132         "core [file tail $gcorefile]"
 133
 134     gdb_test "p \$_siginfo.si_signo" " = $ssi_signo" \
 135         "p \$_siginfo.si_signo from core file"
 136     gdb_test "p \$_siginfo.si_errno" " = $ssi_errno" \
 137         "p \$_siginfo.si_errno from core file"
 138     gdb_test "p \$_siginfo.si_code" " = $ssi_code" \
 139         "p \$_siginfo.si_code from core file"
 140     gdb_test "p \$_siginfo._sifields._sigfault.si_addr" \
 141         " = \\(void \\*\\) $ssi_addr" \
 142         "p \$_siginfo._sifields._sigfault.si_addr from core file"
 143 }