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

   1 # Copyright 2010, 2011 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 if ![istarget *-linux*] {
  20     continue
  21 }
  22
  23 # Remote protocol does not support follow-exec notifications.
  24
  25 if [is_remote target] {
  26     continue
  27 }
  28
  29 set testfile "pie-execl"
  30 set srcfile ${testfile}.c
  31 set executable1 ${testfile}1
  32 set executable2 ${testfile}2
  33 set binfile1 ${objdir}/${subdir}/${executable1}
  34 set binfile2 ${objdir}/${subdir}/${executable2}
  35 set binfile2_test_msg OBJDIR/${subdir}/${executable2}
  36
  37 # Use conditional compilation according to `BIN' as GDB remembers the source
  38 # file name of the breakpoint.
  39
  40 set opts [list debug {additional_flags=-fPIE -pie}]
  41 if {[build_executable ${testfile}.exp $executable1 $srcfile [concat $opts {additional_flags=-DBIN=1}]] == ""
  42     || [build_executable ${testfile}.exp $executable2 $srcfile [concat $opts {additional_flags=-DBIN=2}]] == ""} {
  43     return -1
  44 }
  45
  46 clean_restart ${executable1}
  47
  48 gdb_test_no_output "set args ${binfile2}" "set args ${binfile2_test_msg}"
  49
  50 if ![runto_main] {
  51     return -1
  52 }
  53
  54 # Do not stop on `main' after re-exec.
  55 delete_breakpoints
  56
  57 gdb_breakpoint "pie_execl_marker"
  58 gdb_test "info breakpoints" ".*" ""
  59
  60 set addr1 ""
  61 set test "pie_execl_marker address first"
  62 gdb_test_multiple "p/x &pie_execl_marker" $test {
  63     -re " = (0x\[0-9a-f\]+)\r\n$gdb_prompt $" {
  64         set addr1 $expect_out(1,string)
  65         pass $test
  66     }
  67 }
  68 verbose -log "addr1 is $addr1"
  69
  70 set test "continue"
  71 gdb_test_multiple $test $test {
  72     -re "Error in re-setting breakpoint" {
  73         fail $test
  74     }
  75     -re "Cannot access memory" {
  76         fail $test
  77     }
  78     -re "pie-execl: re-exec.*executing new program.*\r\nBreakpoint \[0-9\]+,\[^\r\n\]* pie_execl_marker .*\r\n$gdb_prompt $" {
  79         pass $test
  80     }
  81 }
  82
  83 gdb_test "info breakpoints" ".*" ""
  84
  85 set addr2 ""
  86 set test "pie_execl_marker address second"
  87 gdb_test_multiple "p/x &pie_execl_marker" $test {
  88     -re " = (0x\[0-9a-f\]+)\r\n$gdb_prompt $" {
  89         set addr2 $expect_out(1,string)
  90         pass $test
  91     }
  92 }
  93 verbose -log "addr2 is $addr2"
  94
  95 # Ensure we cannot get a false PASS and the inferior has really changed.
  96 set test "pie_execl_marker address has changed"
  97 if [string equal $addr1 $addr2] {
  98     fail $test
  99 } else {
 100     pass $test
 101 }