gdb/testsuite/gdb.dwarf2/rnglists-multiple-cus.exp

   1 # Copyright 2020-2022 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 # Test to reproduce the crash described in PR 26813.
  17 #
  18 # When reading a list in any table in the .debug_rnglists section, GDB would
  19 # read the header at offset 0 in the section (the header of the first table).
  20 # When the index of the list we read was greater than the number of lists of
  21 # the first table, GDB would erroneously report that the index is invalid.
  22 #
  23 # So this test creates a .debug_rnglists section with two tables.  The second
  24 # table has more lists than the first one and we try to read a high index in
  25 # the second table.
  26
  27 load_lib dwarf.exp
  28
  29 if {![dwarf2_support]} {
  30     return 0
  31 }
  32
  33 # Test with 32-bit and 64-bit DWARF.
  34 foreach_with_prefix is_64 {false true} {
  35     if { $is_64 } {
  36         standard_testfile main.c -dw64.S
  37         set testfile ${testfile}-dw64
  38     } else {
  39         standard_testfile main.c -dw32.S
  40         set testfile ${testfile}-dw32
  41     }
  42
  43     set asm_file [standard_output_file $srcfile2]
  44     Dwarf::assemble $asm_file {
  45         global is_64
  46
  47         # The CU uses the DW_FORM_rnglistx form to refer to the .debug_rnglists
  48         # section.
  49         cu {
  50             version 5
  51             is_64 $is_64
  52         } {
  53             DW_TAG_compile_unit {
  54                 {DW_AT_ranges 1 DW_FORM_rnglistx}
  55                 {DW_AT_rnglists_base cu_table DW_FORM_sec_offset}
  56             } {
  57                 # This tests a DW_AT_ranges attribute of form DW_FORM_rnglistx on a
  58                 # function, which was buggy at some point.
  59                 DW_TAG_subprogram {
  60                     {DW_AT_name "foo"}
  61                     {DW_AT_ranges 2 DW_FORM_rnglistx}
  62                 }
  63             }
  64         }
  65
  66         rnglists {is-64 $is_64} {
  67             # This table is unused, but exists so that the used table is not at
  68             # the beginning of the section.
  69             table {} {
  70                 list_ {
  71                     start_end 0x1000 0x2000
  72                 }
  73             }
  74
  75             # The lists in this table are accessed by index (DW_FORM_rnglistx).
  76             table {post-header-label cu_table} {
  77                 # This list is unused, but exists to offset the next ones.
  78                 list_ {
  79                     start_end 0x2000 0x3000
  80                 }
  81
  82                 # For the CU.
  83                 list_ {
  84                     start_end 0x3000 0x4000
  85                 }
  86
  87                 # For function foo.
  88                 list_ {
  89                     start_end 0x3000 0x3010
  90                 }
  91             }
  92         }
  93     }
  94
  95     if { [prepare_for_testing "failed to prepare" ${testfile} \
  96               [list $srcfile $asm_file] {nodebug}] } {
  97         return -1
  98     }
  99
 100     # Sanity checks to make sure GDB slurped the symbols correctly.
 101     gdb_test "p/x &foo" " = 0x3000"
 102 }