1# Copyright 2010-2020 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# The problem was due to amd64_skip_prologue attempting to access inferior 17# memory before the PIE (Position Independent Executable) gets relocated. 18 19global inferior_spawn_id 20global gdb_spawn_id 21 22if ![istarget *-linux*] { 23 continue 24} 25 26# In remote mode we cannot use the 'set args' command, and this 27# test requires it. 28if { [target_info exists gdb_protocol] } then { 29 if { [target_info gdb_protocol] == "remote" } then { 30 continue 31 } 32} 33 34standard_testfile .c 35set executable1 ${testfile}1 36set executable2 ${testfile}2 37set binfile1 ${binfile}1 38set binfile2 ${binfile}2 39set binfile2_test_msg OBJDIR/${subdir}/${executable2} 40 41# Use conditional compilation according to `BIN' as GDB remembers the source 42# file name of the breakpoint. 43 44set opts [list debug additional_flags=-fPIE ldflags=-pie] 45if {[build_executable ${testfile}.exp $executable1 $srcfile [concat $opts {additional_flags=-DBIN=1}]] == -1 46 || [build_executable ${testfile}.exp $executable2 $srcfile [concat $opts {additional_flags=-DBIN=2}]] == -1} { 47 return -1 48} 49 50clean_restart ${executable1} 51 52gdb_test_no_output "set args ${binfile2}" "set args ${binfile2_test_msg}" 53 54if ![runto_main] { 55 return -1 56} 57 58# Do not stop on `main' after re-exec. 59delete_breakpoints 60 61gdb_breakpoint "pie_execl_marker" 62gdb_test "info breakpoints" ".*" "" 63 64set addr1 "" 65set test "pie_execl_marker address first" 66gdb_test_multiple "p/x &pie_execl_marker" $test { 67 -re " = (0x\[0-9a-f\]+)\r\n$gdb_prompt $" { 68 set addr1 $expect_out(1,string) 69 pass $test 70 } 71} 72verbose -log "addr1 is $addr1" 73 74set test "continue" 75set matches_found 0 76gdb_test_multiple $test $test { 77 -re "Error in re-setting breakpoint" { 78 fail $test 79 } 80 -re "Cannot access memory" { 81 fail $test 82 } 83 -i "$inferior_spawn_id" -re "pie-execl: re-exec" { 84 # output from inferior 85 incr matches_found 86 if { $matches_found == 2 } { 87 pass $test 88 } else { 89 exp_continue 90 } 91 } 92 -i "$gdb_spawn_id" 93 -re "executing new program.*\r\nBreakpoint \[0-9\]+,\[^\r\n\]* pie_execl_marker .*\r\n$gdb_prompt $" { 94 # output from gdb 95 incr matches_found 96 if { $matches_found == 2 } { 97 pass $test 98 } else { 99 exp_continue 100 } 101 } 102} 103 104gdb_test "info breakpoints" ".*" "" 105 106set addr2 "" 107set test "pie_execl_marker address second" 108gdb_test_multiple "p/x &pie_execl_marker" $test { 109 -re " = (0x\[0-9a-f\]+)\r\n$gdb_prompt $" { 110 set addr2 $expect_out(1,string) 111 pass $test 112 } 113} 114verbose -log "addr2 is $addr2" 115 116# Ensure we cannot get a false PASS and the inferior has really changed. 117set test "pie_execl_marker address has changed" 118if [string equal $addr1 $addr2] { 119 fail $test 120} else { 121 pass $test 122} 123