1# Copyright (C) 2015-2023 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# Test that GDB can step past a breakpoint even if GDB doesn't have 17# symbols for the main binary. PR gdb/13858. 18 19standard_testfile start.c 20 21if { [build_executable "failed to build" ${testfile} $srcfile] } { 22 return -1 23} 24 25# Get the current PC. MSG is used as test message. 26 27proc get_pc { msg } { 28 global hex gdb_prompt 29 30 set addr "" 31 gdb_test_multiple "p /x \$pc" "$msg" { 32 -re " = ($hex).*$gdb_prompt $" { 33 set addr $expect_out(1,string) 34 pass "$msg" 35 } 36 } 37 38 return $addr 39} 40 41# Test stepping past a breakpoint with no symbols. DISPLACED is one 42# of the "set displaced-stepping" options. If GDB can't find where to 43# put the scratch pad, GDB should be able to fall back to stepping 44# past the breakpoint using an in-line step-over. 45 46proc test_step_over { displaced } { 47 global hex 48 global binfile 49 50 clean_restart $binfile 51 52 if ![runto_main] { 53 return -1 54 } 55 56 delete_breakpoints 57 58 set msg "purging symbols" 59 gdb_test_multiple "file" "$msg" { 60 -re "Are you sure you want to change the file.*y or n. $" { 61 send_gdb "y\n" 62 exp_continue 63 } 64 -re "Discard symbol table.*y or n. $" { 65 gdb_test "y" "No symbol file now." "$msg" 66 } 67 } 68 69 set before_addr [get_pc "get before PC"] 70 71 gdb_test "break *\$pc" "Breakpoint .* at $hex" 72 73 gdb_test_no_output "set displaced-stepping $displaced" 74 75 gdb_test "stepi" "$hex in \?\? .*" 76 77 set after_addr [get_pc "get after PC"] 78 79 gdb_assert {{[regexp "^${hex}$" $before_addr] \ 80 && [regexp "^${hex}$" $after_addr] \ 81 && $before_addr != $after_addr}} "advanced" 82} 83 84foreach displaced { "off" "on" "auto" } { 85 if { $displaced != "off" && ![support_displaced_stepping] } { 86 continue 87 } 88 89 with_test_prefix "displaced=$displaced" { 90 test_step_over $displaced 91 } 92} 93