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

   1 # Copyright 2010-2024 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 require {istarget *-linux*}
  23
  24 # In remote mode we cannot use the 'set args' command, and this
  25 # test requires it.
  26 if {[target_info exists gdb_protocol]} {
  27     if {[target_info gdb_protocol] == "remote"} {
  28         return
  29     }
  30 }
  31
  32 standard_testfile .c
  33 set executable1 ${testfile}1
  34 set executable2 ${testfile}2
  35 set binfile1 ${binfile}1
  36 set binfile2 ${binfile}2
  37 set binfile2_test_msg OBJDIR/${subdir}/${executable2}
  38
  39 # Use conditional compilation according to `BIN' as GDB remembers the source
  40 # file name of the breakpoint.
  41
  42 set opts [list debug pie]
  43 if {[build_executable ${testfile}.exp $executable1 $srcfile [concat $opts {additional_flags=-DBIN=1}]] == -1
  44     || [build_executable ${testfile}.exp $executable2 $srcfile [concat $opts {additional_flags=-DBIN=2}]] == -1} {
  45     return -1
  46 }
  47
  48 clean_restart ${executable1}
  49
  50 gdb_test_no_output "set args ${binfile2}" "set args ${binfile2_test_msg}"
  51
  52 if ![runto_main] {
  53     return -1
  54 }
  55
  56 # Do not stop on `main' after re-exec.
  57 delete_breakpoints
  58
  59 gdb_breakpoint "pie_execl_marker"
  60 gdb_test "info breakpoints" "" "info breakpoints first"
  61
  62 set addr1 ""
  63 set test "pie_execl_marker address first"
  64 gdb_test_multiple "p/x &pie_execl_marker" $test {
  65     -re " = (0x\[0-9a-f\]+)\r\n$gdb_prompt $" {
  66         set addr1 $expect_out(1,string)
  67         pass $test
  68     }
  69 }
  70 verbose -log "addr1 is $addr1"
  71
  72 set test "continue"
  73 set matches_found 0
  74 gdb_test_multiple $test $test {
  75     -re "Error in re-setting breakpoint" {
  76         fail $test
  77     }
  78     -re "Cannot access memory" {
  79         fail $test
  80     }
  81     -i "$inferior_spawn_id" -re "pie-execl: re-exec" {
  82         # output from inferior
  83         incr matches_found
  84         if { $matches_found == 2 } {
  85             pass $test
  86         } else {
  87             exp_continue
  88         }
  89     }
  90     -i "$gdb_spawn_id"
  91     -re "executing new program.*\r\nBreakpoint \[0-9\]+,\[^\r\n\]* pie_execl_marker .*\r\n$gdb_prompt $" {
  92         # output from gdb
  93         incr matches_found
  94         if { $matches_found == 2 } {
  95             pass $test
  96         } else {
  97             exp_continue
  98         }
  99     }
 100 }
 101
 102 gdb_test "info breakpoints" "" "info breakpoints second"
 103
 104 set addr2 ""
 105 set test "pie_execl_marker address second"
 106 gdb_test_multiple "p/x &pie_execl_marker" $test {
 107     -re " = (0x\[0-9a-f\]+)\r\n$gdb_prompt $" {
 108         set addr2 $expect_out(1,string)
 109         pass $test
 110     }
 111 }
 112 verbose -log "addr2 is $addr2"
 113
 114 # Ensure we cannot get a false PASS and the inferior has really changed.
 115 set test "pie_execl_marker address has changed"
 116 if [string equal $addr1 $addr2] {
 117     fail $test
 118 } else {
 119     pass $test
 120 }