gdb/testsuite/gdb.base/bigcore.exp

   1 # Copyright 1992-2013 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 file is based on corefile.exp which was written by Fred
  17 # Fish. (fnf@cygnus.com)
  18
  19
  20 # Are we on a target board?  As of 2004-02-12, GDB didn't have a
  21 # mechanism that would let it efficiently access a remote corefile.
  22
  23 if ![isnative] then {
  24     untested "Remote system"
  25     return
  26 }
  27
  28 # Can the system run this test (in particular support sparse
  29 # corefiles)?  On systems that lack sparse corefile support this test
  30 # consumes too many resources - gigabytes worth of disk space and
  31 # I/O bandwith.
  32
  33 if { [istarget "*-*-*bsd*"]
  34      || [istarget "*-*-hpux*"]
  35      || [istarget "*-*-solaris*"]
  36      || [istarget "*-*-darwin*"]
  37      || [istarget "*-*-cygwin*"] } {
  38     untested "Kernel lacks sparse corefile support (PR gdb/1551)"
  39     return
  40 }
  41
  42 # This testcase causes too much stress (in terms of memory usage)
  43 # on certain systems...
  44 if { [istarget "*-*-*irix*"] } {
  45     untested "Testcase too stressful for this system"
  46     return
  47 }
  48
  49 set testfile "bigcore"
  50 set srcfile ${testfile}.c
  51 set binfile ${objdir}/${subdir}/${testfile}
  52 set corefile ${objdir}/${subdir}/${testfile}.corefile
  53
  54 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  55      untested bigcore.exp
  56      return -1
  57 }
  58
  59 # Run GDB on the bigcore program up-to where it will dump core.
  60
  61 gdb_exit
  62 gdb_start
  63 gdb_reinitialize_dir $srcdir/$subdir
  64 gdb_load ${binfile}
  65 gdb_test_no_output "set print sevenbit-strings"
  66 gdb_test_no_output "set width 0"
  67
  68 if { ![runto_main] } then {
  69     gdb_suppress_tests;
  70 }
  71 set print_core_line [gdb_get_line_number "Dump core"]
  72 gdb_test "tbreak $print_core_line"
  73 gdb_test continue ".*print_string.*"
  74 gdb_test next ".*0 = 0.*"
  75
  76 # Traverse part of bigcore's linked list of memory chunks (forward or
  77 # backward), saving each chunk's address.
  78
  79 proc extract_heap { dir } {
  80     global gdb_prompt
  81     global expect_out
  82     set heap ""
  83     set test "extract ${dir} heap"
  84     set lim 0
  85     gdb_test_multiple "print heap.${dir}" "$test" {
  86         -re " = \\(struct list \\*\\) 0x0.*$gdb_prompt $" {
  87             pass "$test"
  88         }
  89         -re " = \\(struct list \\*\\) (0x\[0-9a-f\]*).*$gdb_prompt $" {
  90             set heap [concat $heap $expect_out(1,string)]
  91             if { $lim >= 200 } {
  92                 pass "$test (stop at $lim)"
  93             } else {
  94                 incr lim
  95                 send_gdb "print \$.${dir}\n"
  96                 exp_continue
  97             }
  98         }
  99         -re ".*$gdb_prompt $" {
 100             fail "$test (entry $lim)"
 101         }
 102         timeout {
 103             fail "$test (timeout)"
 104         }
 105     }
 106     return $heap
 107 }
 108 set next_heap [extract_heap next]
 109 set prev_heap [extract_heap prev]
 110
 111 # Save the total allocated size within GDB so that we can check
 112 # the core size later.
 113 gdb_test_no_output "set \$bytes_allocated = bytes_allocated" "save heap size"
 114
 115 # Now create a core dump
 116
 117 # Rename the core file to "TESTFILE.corefile" rather than just "core",
 118 # to avoid problems with sys admin types that like to regularly prune
 119 # all files named "core" from the system.
 120
 121 # Some systems append "core" to the name of the program; others append
 122 # the name of the program to "core"; still others (like Linux, as of
 123 # May 2003) create cores named "core.PID".
 124
 125 # Save the process ID.  Some systems dump the core into core.PID.
 126 set test "grab pid"
 127 gdb_test_multiple "info program" $test {
 128     -re "child process (\[0-9\]+).*$gdb_prompt $" {
 129         set inferior_pid $expect_out(1,string)
 130         pass $test
 131     }
 132     -re "$gdb_prompt $" {
 133         set inferior_pid unknown
 134         pass $test
 135     }
 136 }
 137
 138 # Dump core using SIGABRT
 139 set oldtimeout $timeout
 140 set timeout 600
 141 gdb_test "signal SIGABRT" "Program terminated with signal SIGABRT, .*"
 142 set timeout $oldtimeout
 143
 144 # Find the corefile
 145 set file ""
 146 foreach pat [list core.${inferior_pid} ${testfile}.core core] {
 147     set names [glob -nocomplain $pat]
 148     if {[llength $names] == 1} {
 149         set file [lindex $names 0]
 150         remote_exec build "mv $file $corefile"
 151         break
 152     }
 153 }
 154
 155 if { $file == "" } {
 156     untested "Can't generate a core file"
 157     return 0
 158 }
 159
 160 # Check that the corefile is plausibly large enough.  We're trying to
 161 # detect the case where the operating system has truncated the file
 162 # just before signed wraparound.  TCL, unfortunately, has a similar
 163 # problem - so use catch.  It can handle the "bad" size but not
 164 # necessarily the "good" one.  And we must use GDB for the comparison,
 165 # similarly.
 166
 167 if {[catch {file size $corefile} core_size] == 0} {
 168     set core_ok 0
 169     gdb_test_multiple "print \$bytes_allocated < $core_size" "check core size" {
 170         -re " = 1\r\n$gdb_prompt $" {
 171             pass "check core size"
 172             set core_ok 1
 173         }
 174         -re " = 0\r\n$gdb_prompt $" {
 175             pass "check core size"
 176             set core_ok 0
 177         }
 178     }
 179 } {
 180     # Probably failed due to the TCL build having problems with very
 181     # large values.  Since GDB uses a 64-bit off_t (when possible) it
 182     # shouldn't have this problem.  Assume that things are going to
 183     # work.  Without this assumption the test is skiped on systems
 184     # (such as i386 GNU/Linux with patched kernel) which do pass.
 185     pass "check core size"
 186     set core_ok 1
 187 }
 188 if {! $core_ok} {
 189     untested "check core size (system does not support large corefiles)"
 190     return 0
 191 }
 192
 193 # Now load up that core file
 194
 195 set test "load corefile"
 196 gdb_test_multiple "core $corefile" "$test" {
 197     -re "A program is being debugged already.  Kill it. .y or n. " {
 198         send_gdb "y\n"
 199         exp_continue
 200     }
 201     -re "Core was generated by.*$gdb_prompt $" {
 202         pass "$test"
 203     }
 204 }
 205
 206 # Finally, re-traverse bigcore's linked list, checking each chunk's
 207 # address against the executable.  Don't use gdb_test_multiple as want
 208 # only one pass/fail.  Don't use exp_continue as the regular
 209 # expression involving $heap needs to be re-evaluated for each new
 210 # response.
 211
 212 proc check_heap { dir heap } {
 213     global gdb_prompt
 214     set test "check ${dir} heap"
 215     set ok 1
 216     set lim 0
 217     send_gdb "print heap.${dir}\n"
 218     while { $ok } {
 219         gdb_expect {
 220             -re " = \\(struct list \\*\\) [lindex $heap $lim].*$gdb_prompt $" {
 221                 if { $lim >= [llength $heap] } {
 222                     pass "$test"
 223                     set ok 0
 224                 } else {
 225                     incr lim
 226                     send_gdb "print \$.${dir}\n"
 227                 }
 228             }
 229             -re ".*$gdb_prompt $" {
 230                 fail "$test (address [lindex $heap $lim])"
 231                 set ok 0
 232             }
 233             timeout {
 234                 fail "$test (timeout)"
 235                 set ok 0
 236             }
 237         }
 238     }
 239 }
 240
 241 check_heap next $next_heap
 242 check_heap prev $prev_heap