1# Copyright 2014-2020 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# Regression test for a bug where GDB would internal error if a thread 18# runs into a breakpoint that needs stepping over, just after stepping 19# over another breakpoint, without a user visible stop in between. 20# 21standard_testfile 22 23if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} { 24 return -1 25} 26 27if ![runto_main] then { 28 fail "can't run to main" 29 return 0 30} 31 32# Make sure the target doesn't hide the breakpoint hits (that don't 33# cause a user visible stop) from GDB. 34gdb_test_no_output "set breakpoint condition-evaluation host" 35 36set up_to_nl "\[^\r\n\]+\[\r\n\]+" 37 38# Number of consecutive breakpoints in a row to try. 39set n_insns 3 40 41# Extract addresses of a few consecutive instructions. 42set test "get breakpoint addresses" 43if { [gdb_test_multiple "x /[expr $n_insns + 1]i \$pc" $test { 44 -re "=> $hex${up_to_nl} ($hex)${up_to_nl} ($hex)${up_to_nl} ($hex)${up_to_nl}$gdb_prompt $" { 45 for {set i 1} {$i <= $n_insns} {incr i} { 46 set bp_addrs($i) $expect_out($i,string) 47 } 48 pass $test 49 } 50}] != 0 } { 51 # No use proceeding if bp_addrs wasn't set. 52 return 53} 54 55for {set i 1} {$i <= $n_insns} {incr i} { 56 with_test_prefix "insn $i" { 57 gdb_test "break \*$bp_addrs($i)" \ 58 "Breakpoint $decimal at $bp_addrs($i): file .*" \ 59 "set breakpoint" 60 61 # Give the breakpoint a condition that always fails, so that 62 # the thread is immediately re-resumed. 63 gdb_test_no_output "condition \$bpnum condition" \ 64 "set condition" 65 } 66} 67 68set lineno [gdb_get_line_number "break here"] 69gdb_breakpoint $lineno 70gdb_continue_to_breakpoint "break here" ".*break here.*" 71