gdb/testsuite/gdb.base/pie-execl.exp

   1 # Copyright 2010-2022 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
  19 global inferior_spawn_id
  20 global gdb_spawn_id
  21
  22 if ![istarget *-linux*] {
  23     continue
  24 }
  25
  26 # In remote mode we cannot use the 'set args' command, and this
  27 # test requires it.
  28 if { [target_info exists gdb_protocol] } then {
  29     if { [target_info gdb_protocol] == "remote" } then {
  30         continue
  31     }
  32 }
  33
  34 standard_testfile .c
  35 set executable1 ${testfile}1
  36 set executable2 ${testfile}2
  37 set binfile1 ${binfile}1
  38 set binfile2 ${binfile}2
  39 set binfile2_test_msg OBJDIR/${subdir}/${executable2}
  40
  41 # Use conditional compilation according to `BIN' as GDB remembers the source
  42 # file name of the breakpoint.
  43
  44 set opts [list debug pie]
  45 if {[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
  50 clean_restart ${executable1}
  51
  52 gdb_test_no_output "set args ${binfile2}" "set args ${binfile2_test_msg}"
  53
  54 if ![runto_main] {
  55     return -1
  56 }
  57
  58 # Do not stop on `main' after re-exec.
  59 delete_breakpoints
  60
  61 gdb_breakpoint "pie_execl_marker"
  62 gdb_test "info breakpoints" ".*" ""
  63
  64 set addr1 ""
  65 set test "pie_execl_marker address first"
  66 gdb_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 }
  72 verbose -log "addr1 is $addr1"
  73
  74 set test "continue"
  75 set matches_found 0
  76 gdb_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
 104 gdb_test "info breakpoints" ".*" ""
 105
 106 set addr2 ""
 107 set test "pie_execl_marker address second"
 108 gdb_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 }
 114 verbose -log "addr2 is $addr2"
 115
 116 # Ensure we cannot get a false PASS and the inferior has really changed.
 117 set test "pie_execl_marker address has changed"
 118 if [string equal $addr1 $addr2] {
 119     fail $test
 120 } else {
 121     pass $test
 122 }