gdb/testsuite/gdb.base/argv0-symlink.exp

   1 # Copyright 2013-2022 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 # This testcase was originally for PR gdb/15415, a problem with the "run"
  17 # command expanding symlinks in the name of the program being run.
  18 # This test uses pathnames on build to create symbolic links on host and
  19 # expects the test program running on target to see those symbolic links.
  20 # Therefore, it can't work reliably on anything other than configurations
  21 # where build/host/target are all the same.
  22
  23 if { ![isnative] } {
  24     unsupported "argv0-symlink.exp not supported on non-native target"
  25     return -1
  26 }
  27
  28 if { [is_remote host] } {
  29     unsupported "argv0-symlink.exp not supported on remote host"
  30     return -1
  31 }
  32
  33 standard_testfile
  34
  35 set has_argv0 [gdb_has_argv0]
  36
  37 if { [build_executable ${testfile}.exp ${testfile} ${srcfile}] == -1 } {
  38     return -1
  39 }
  40
  41 with_test_prefix "file symlink" {
  42
  43     set test "kept name"
  44     set filelink "${testfile}-filelink"
  45
  46     remote_file host delete [standard_output_file $filelink]
  47     set status [remote_exec host \
  48                     "ln -sf ${testfile} [standard_output_file $filelink]"]
  49     if {[lindex $status 0] != 0} {
  50         unsupported "$test (host does not support symbolic links)"
  51         return 0
  52     }
  53
  54     clean_restart "$filelink"
  55
  56     if ![runto_main] {
  57         untested "could not run to main"
  58         return -1
  59     }
  60
  61     gdb_test_no_output "set print repeats 10000"
  62     gdb_test_no_output "set print elements 10000"
  63
  64     if { $has_argv0 } {
  65         gdb_test {print argv[0]} "/$filelink\"" $test
  66     } else {
  67         unsupported $test
  68     }
  69
  70     # For a link named /PATH/TO/DIR/LINK, we want to check the output
  71     # against "/DIR/LINK", but computed in a way that doesn't make
  72     # assumptions about the test directory layout.
  73     set full_filelink [standard_output_file $filelink]
  74     set lastdir [file tail [file dirname $full_filelink]]
  75
  76     gdb_test "info inferiors" "/$lastdir/$filelink *" \
  77         "$test for info inferiors"
  78 }
  79
  80 with_test_prefix "dir symlink" {
  81
  82     set test "kept name"
  83     set dirlink "${testfile}-dirlink"
  84
  85     # 'ln -sf' does not overwrite symbol link to a directory.
  86     # 'remote_file host delete' uses stat (not lstat), therefore it refuses to
  87     # delete a directory.
  88     remote_exec host "rm -f [standard_output_file $dirlink]"
  89     set status [remote_exec host "ln -sf . [standard_output_file $dirlink]"]
  90     if {[lindex $status 0] != 0} {
  91         unsupported "$test (host does not support symbolic links)"
  92         return 0
  93     }
  94
  95     clean_restart "$dirlink/$filelink"
  96
  97     if ![runto_main] {
  98         untested "could not run to main"
  99         return -1
 100     }
 101
 102     gdb_test_no_output "set print repeats 10000"
 103     gdb_test_no_output "set print elements 10000"
 104
 105     if { $has_argv0 } {
 106         # gdbserver in extended-remote mode does not have this issue.
 107         # Plain remote does, however.
 108         if { [target_info gdb_protocol] != "extended-remote"
 109              || ![target_is_gdbserver] } {
 110             setup_kfail "*-*-*" gdb/15934
 111         }
 112         gdb_test {print argv[0]} "/$dirlink/$filelink\"" $test
 113     } else {
 114         unsupported $test
 115     }
 116
 117     gdb_test "info inferiors" "/$lastdir/$filelink *" \
 118         "$test for info inferiors"
 119 }