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

   1 # Copyright 2010-2015 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 standard_testfile .c
  30 set executable1 ${testfile}1
  31 set executable2 ${testfile}2
  32 set binfile1 ${binfile}1
  33 set binfile2 ${binfile}2
  34 set binfile2_test_msg OBJDIR/${subdir}/${executable2}
  35
  36 # Use conditional compilation according to `BIN' as GDB remembers the source
  37 # file name of the breakpoint.
  38
  39 set opts [list debug additional_flags=-fPIE ldflags=-pie]
  40 if {[build_executable ${testfile}.exp $executable1 $srcfile [concat $opts {additional_flags=-DBIN=1}]] == -1
  41     || [build_executable ${testfile}.exp $executable2 $srcfile [concat $opts {additional_flags=-DBIN=2}]] == -1} {
  42     return -1
  43 }
  44
  45 clean_restart ${executable1}
  46
  47 gdb_test_no_output "set args ${binfile2}" "set args ${binfile2_test_msg}"
  48
  49 if ![runto_main] {
  50     return -1
  51 }
  52
  53 # Do not stop on `main' after re-exec.
  54 delete_breakpoints
  55
  56 gdb_breakpoint "pie_execl_marker"
  57 gdb_test "info breakpoints" ".*" ""
  58
  59 set addr1 ""
  60 set test "pie_execl_marker address first"
  61 gdb_test_multiple "p/x &pie_execl_marker" $test {
  62     -re " = (0x\[0-9a-f\]+)\r\n$gdb_prompt $" {
  63         set addr1 $expect_out(1,string)
  64         pass $test
  65     }
  66 }
  67 verbose -log "addr1 is $addr1"
  68
  69 set test "continue"
  70 gdb_test_multiple $test $test {
  71     -re "Error in re-setting breakpoint" {
  72         fail $test
  73     }
  74     -re "Cannot access memory" {
  75         fail $test
  76     }
  77     -re "pie-execl: re-exec.*executing new program.*\r\nBreakpoint \[0-9\]+,\[^\r\n\]* pie_execl_marker .*\r\n$gdb_prompt $" {
  78         pass $test
  79     }
  80 }
  81
  82 gdb_test "info breakpoints" ".*" ""
  83
  84 set addr2 ""
  85 set test "pie_execl_marker address second"
  86 gdb_test_multiple "p/x &pie_execl_marker" $test {
  87     -re " = (0x\[0-9a-f\]+)\r\n$gdb_prompt $" {
  88         set addr2 $expect_out(1,string)
  89         pass $test
  90     }
  91 }
  92 verbose -log "addr2 is $addr2"
  93
  94 # Ensure we cannot get a false PASS and the inferior has really changed.
  95 set test "pie_execl_marker address has changed"
  96 if [string equal $addr1 $addr2] {
  97     fail $test
  98 } else {
  99     pass $test
 100 }