gdb/testsuite/gdb.dwarf2/gdb-index.exp

   1 # Copyright 2013-2020 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 load_lib dwarf.exp
  17
  18 # This test can only be run on targets which support DWARF-2.
  19 if {![dwarf2_support]} {
  20     return 0
  21 }
  22
  23 standard_testfile main.c
  24
  25 if { [prepare_for_testing "failed to prepare" "${testfile}" \
  26           [list ${srcfile}]] } {
  27     return -1
  28 }
  29
  30 # Add a .gdb_index section to PROGRAM.
  31 # PROGRAM is assumed to be the output of standard_output_file.
  32 # Returns the path of the program or "" if there is a failure.
  33 # If there is a failure it will have already been logged.
  34
  35 proc add_gdb_index { program } {
  36     set index_file ${program}.gdb-index
  37     set dir [file dirname ${program}]
  38     set filename [file tail ${program}]
  39     set dwz $dir/.tmp/${filename}.dwz
  40     set dwz_index_file $program.dwz.gdb-index
  41     verbose -log "index_file: ${index_file}"
  42     remote_file host delete ${index_file}
  43     remote_file host delete ${dwz_index_file}
  44     gdb_test_no_output "save gdb-index [file dirname ${index_file}]" \
  45         "save gdb-index for file [file tail ${program}]"
  46
  47     # No point in continuing if generating the index failed.
  48     # N.B.: There are times when gdb won't create an index, and it's not a
  49     # failure.  However, in our case we need an index.  So if you find one
  50     # not being generated, you'll either have to tweak the .c file or maybe
  51     # add a flag to force an index to be generated.
  52     if { [remote_file host exists ${index_file}] } {
  53         pass "gdb-index file created"
  54     } else {
  55         fail "gdb-index file created"
  56         return ""
  57     }
  58
  59     set program_with_index ${program}.with-index
  60     if {[run_on_host "objcopy" [gdb_find_objcopy] "--remove-section .gdb_index --add-section .gdb_index=$index_file --set-section-flags .gdb_index=readonly ${program} ${program_with_index}"]} {
  61         return ""
  62     }
  63
  64     with_test_prefix "modify dwz file" {
  65         if { [remote_file host exists ${dwz_index_file}] } {
  66             # We're modifying $dwz in place, otherwise we'd have to update
  67             # .gnu_debugaltlink in $program.
  68             set args [join [list "--remove-section .gdb_index" \
  69                                 " --add-section .gdb_index=$dwz_index_file" \
  70                                 " --set-section-flags .gdb_index=readonly $dwz"]]
  71             if {[run_on_host "objcopy" [gdb_find_objcopy] "$args"]} {
  72                 return ""
  73             }
  74         }
  75     }
  76
  77     return ${program_with_index}
  78 }
  79
  80 # Build a copy of the program with an index (.gdb_index/.debug_names).
  81 # But only if the toolchain didn't already create one: gdb doesn't support
  82 # building an index from a program already using one.
  83
  84 set test "check if index present"
  85 gdb_test_multiple "mt print objfiles ${testfile}" $test {
  86     -re "gdb_index.*${gdb_prompt} $" {
  87         set binfile_with_index $binfile
  88     }
  89     -re "debug_names.*${gdb_prompt} $" {
  90         set binfile_with_index $binfile
  91     }
  92     -re "Psymtabs.*${gdb_prompt} $" {
  93         set binfile_with_index [add_gdb_index $binfile]
  94         if { ${binfile_with_index} == "" } {
  95             return -1
  96         }
  97     }
  98 }
  99
 100 # Ok, we have a copy of $binfile with an index.
 101 # Restart gdb and verify the index was used.
 102
 103 clean_restart ${binfile_with_index}
 104 gdb_test "mt print objfiles ${testfile}" \
 105     "(gdb_index|debug_names).*" \
 106     "index used"
 107
 108 # Make gdb re-read symbols and see if .gdb_index/.debug_names still
 109 # gets used.  symtab/15885
 110
 111 # There is gdb_touch_execfile, but it doesn't handle remote hosts.
 112 # Is touch portable enough?
 113 # First make sure enough time has passed, file mtime resolution is seconds.
 114 gdb_test_no_output "shell sleep 1"
 115 if {[run_on_host "touch binary" touch ${binfile_with_index}]} {
 116     return -1
 117 }
 118
 119 if ![runto_main] {
 120     return -1
 121 }
 122 gdb_test "mt print objfiles ${testfile}" \
 123     "(gdb_index|debug_names).*" \
 124     "index used after symbol reloading"