gdb/testsuite/gdb.base/bigcore.exp

   1 # Copyright 1992-2000, 2004-2005, 2007-2012 Free Software Foundation,
   2 # Inc.
   3
   4 # This program is free software; you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation; either version 3 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 # This file is based on corefile.exp which was written by Fred
  18 # Fish. (fnf@cygnus.com)
  19
  20
  21 # Are we on a target board?  As of 2004-02-12, GDB didn't have a
  22 # mechanism that would let it efficiently access a remote corefile.
  23
  24 if ![isnative] then {
  25     untested "Remote system"
  26     return
  27 }
  28
  29 # Can the system run this test (in particular support sparse
  30 # corefiles)?  On systems that lack sparse corefile support this test
  31 # consumes too many resources - gigabytes worth of disk space and
  32 # I/O bandwith.
  33
  34 if { [istarget "*-*-*bsd*"]
  35      || [istarget "*-*-hpux*"]
  36      || [istarget "*-*-solaris*"]
  37      || [istarget "*-*-darwin*"]
  38      || [istarget "*-*-cygwin*"] } {
  39     untested "Kernel lacks sparse corefile support (PR gdb/1551)"
  40     return
  41 }
  42
  43 # This testcase causes too much stress (in terms of memory usage)
  44 # on certain systems...
  45 if { [istarget "*-*-*irix*"] } {
  46     untested "Testcase too stressful for this system"
  47     return
  48 }
  49
  50 set testfile "bigcore"
  51 set srcfile ${testfile}.c
  52 set binfile ${objdir}/${subdir}/${testfile}
  53 set corefile ${objdir}/${subdir}/${testfile}.corefile
  54
  55 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  56      untested bigcore.exp
  57      return -1
  58 }
  59
  60 # Run GDB on the bigcore program up-to where it will dump core.
  61
  62 gdb_exit
  63 gdb_start
  64 gdb_reinitialize_dir $srcdir/$subdir
  65 gdb_load ${binfile}
  66 gdb_test_no_output "set print sevenbit-strings"
  67 gdb_test_no_output "set width 0"
  68
  69 if { ![runto_main] } then {
  70     gdb_suppress_tests;
  71 }
  72 set print_core_line [gdb_get_line_number "Dump core"]
  73 gdb_test "tbreak $print_core_line"
  74 gdb_test continue ".*print_string.*"
  75 gdb_test next ".*0 = 0.*"
  76
  77 # Traverse part of bigcore's linked list of memory chunks (forward or
  78 # backward), saving each chunk's address.
  79
  80 proc extract_heap { dir } {
  81     global gdb_prompt
  82     global expect_out
  83     set heap ""
  84     set test "extract ${dir} heap"
  85     set lim 0
  86     gdb_test_multiple "print heap.${dir}" "$test" {
  87         -re " = \\(struct list \\*\\) 0x0.*$gdb_prompt $" {
  88             pass "$test"
  89         }
  90         -re " = \\(struct list \\*\\) (0x\[0-9a-f\]*).*$gdb_prompt $" {
  91             set heap [concat $heap $expect_out(1,string)]
  92             if { $lim >= 200 } {
  93                 pass "$test (stop at $lim)"
  94             } else {
  95                 incr lim
  96                 send_gdb "print \$.${dir}\n"
  97                 exp_continue
  98             }
  99         }
 100         -re ".*$gdb_prompt $" {
 101             fail "$test (entry $lim)"
 102         }
 103         timeout {
 104             fail "$test (timeout)"
 105         }
 106     }
 107     return $heap;
 108 }
 109 set next_heap [extract_heap next]
 110 set prev_heap [extract_heap prev]
 111
 112 # Save the total allocated size within GDB so that we can check
 113 # the core size later.
 114 gdb_test_no_output "set \$bytes_allocated = bytes_allocated" "save heap size"
 115
 116 # Now create a core dump
 117
 118 # Rename the core file to "TESTFILE.corefile" rather than just "core",
 119 # to avoid problems with sys admin types that like to regularly prune
 120 # all files named "core" from the system.
 121
 122 # Some systems append "core" to the name of the program; others append
 123 # the name of the program to "core"; still others (like Linux, as of
 124 # May 2003) create cores named "core.PID".
 125
 126 # Save the process ID.  Some systems dump the core into core.PID.
 127 set test "grab pid"
 128 gdb_test_multiple "info program" $test {
 129     -re "child process (\[0-9\]+).*$gdb_prompt $" {
 130         set inferior_pid $expect_out(1,string)
 131         pass $test
 132     }
 133     -re "$gdb_prompt $" {
 134         set inferior_pid unknown
 135         pass $test
 136     }
 137 }
 138
 139 # Dump core using SIGABRT
 140 set oldtimeout $timeout
 141 set timeout 600
 142 gdb_test "signal SIGABRT" "Program terminated with signal SIGABRT, .*"
 143 set timeout $oldtimeout
 144
 145 # Find the corefile
 146 set file ""
 147 foreach pat [list core.${inferior_pid} ${testfile}.core core] {
 148     set names [glob -nocomplain $pat]
 149     if {[llength $names] == 1} {
 150         set file [lindex $names 0]
 151         remote_exec build "mv $file $corefile"
 152         break
 153     }
 154 }
 155
 156 if { $file == "" } {
 157     untested "Can't generate a core file"
 158     return 0
 159 }
 160
 161 # Check that the corefile is plausibly large enough.  We're trying to
 162 # detect the case where the operating system has truncated the file
 163 # just before signed wraparound.  TCL, unfortunately, has a similar
 164 # problem - so use catch.  It can handle the "bad" size but not
 165 # necessarily the "good" one.  And we must use GDB for the comparison,
 166 # similarly.
 167
 168 if {[catch {file size $corefile} core_size] == 0} {
 169     set core_ok 0
 170     gdb_test_multiple "print \$bytes_allocated < $core_size" "check core size" {
 171         -re " = 1\r\n$gdb_prompt $" {
 172             pass "check core size"
 173             set core_ok 1
 174         }
 175         -re " = 0\r\n$gdb_prompt $" {
 176             pass "check core size"
 177             set core_ok 0
 178         }
 179     }
 180 } {
 181     # Probably failed due to the TCL build having problems with very
 182     # large values.  Since GDB uses a 64-bit off_t (when possible) it
 183     # shouldn't have this problem.  Assume that things are going to
 184     # work.  Without this assumption the test is skiped on systems
 185     # (such as i386 GNU/Linux with patched kernel) which do pass.
 186     pass "check core size"
 187     set core_ok 1
 188 }
 189 if {! $core_ok} {
 190     untested "check core size (system does not support large corefiles)"
 191     return 0
 192 }
 193
 194 # Now load up that core file
 195
 196 set test "load corefile"
 197 gdb_test_multiple "core $corefile" "$test" {
 198     -re "A program is being debugged already.  Kill it. .y or n. " {
 199         send_gdb "y\n"
 200         exp_continue
 201     }
 202     -re "Core was generated by.*$gdb_prompt $" {
 203         pass "$test"
 204     }
 205 }
 206
 207 # Finally, re-traverse bigcore's linked list, checking each chunk's
 208 # address against the executable.  Don't use gdb_test_multiple as want
 209 # only one pass/fail.  Don't use exp_continue as the regular
 210 # expression involving $heap needs to be re-evaluated for each new
 211 # response.
 212
 213 proc check_heap { dir heap } {
 214     global gdb_prompt
 215     set test "check ${dir} heap"
 216     set ok 1
 217     set lim 0
 218     send_gdb "print heap.${dir}\n"
 219     while { $ok } {
 220         gdb_expect {
 221             -re " = \\(struct list \\*\\) [lindex $heap $lim].*$gdb_prompt $" {
 222                 if { $lim >= [llength $heap] } {
 223                     pass "$test"
 224                     set ok 0
 225                 } else {
 226                     incr lim
 227                     send_gdb "print \$.${dir}\n"
 228                 }
 229             }
 230             -re ".*$gdb_prompt $" {
 231                 fail "$test (address [lindex $heap $lim])"
 232                 set ok 0
 233             }
 234             timeout {
 235                 fail "$test (timeout)"
 236                 set ok 0
 237             }
 238         }
 239     }
 240 }
 241
 242 check_heap next $next_heap
 243 check_heap prev $prev_heap