gdb/testsuite/gdb.base/bigcore.exp

   1 # Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2004, 2005,
   2 # 2007, 2008, 2009, 2010 Free Software Foundation, 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 if $tracelevel then {
  21         strace $tracelevel
  22 }
  23
  24
  25 # Are we on a target board?  As of 2004-02-12, GDB didn't have a
  26 # mechanism that would let it efficiently access a remote corefile.
  27
  28 if ![isnative] then {
  29     untested "Remote system"
  30     return
  31 }
  32
  33 # Can the system run this test (in particular support sparse
  34 # corefiles)?  On systems that lack sparse corefile support this test
  35 # consumes too many resources - gigabytes worth of disk space and and
  36 # I/O bandwith.
  37
  38 if { [istarget "*-*-*bsd*"]
  39      || [istarget "*-*-hpux*"]
  40      || [istarget "*-*-solaris*"]
  41      || [istarget "*-*-darwin*"]
  42      || [istarget "*-*-cygwin*"] } {
  43     untested "Kernel lacks sparse corefile support (PR gdb/1551)"
  44     return
  45 }
  46
  47 # This testcase causes too much stress (in terms of memory usage)
  48 # on certain systems...
  49 if { [istarget "*-*-*irix*"] } {
  50     untested "Testcase too stressful for this system"
  51     return
  52 }
  53
  54 set testfile "bigcore"
  55 set srcfile ${testfile}.c
  56 set binfile ${objdir}/${subdir}/${testfile}
  57 set corefile ${objdir}/${subdir}/${testfile}.corefile
  58
  59 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  60      untested bigcore.exp
  61      return -1
  62 }
  63
  64 # Run GDB on the bigcore program up-to where it will dump core.
  65
  66 gdb_exit
  67 gdb_start
  68 gdb_reinitialize_dir $srcdir/$subdir
  69 gdb_load ${binfile}
  70 gdb_test_no_output "set print sevenbit-strings"
  71 gdb_test_no_output "set width 0"
  72
  73 if { ![runto_main] } then {
  74     gdb_suppress_tests;
  75 }
  76 set print_core_line [gdb_get_line_number "Dump core"]
  77 gdb_test "tbreak $print_core_line"
  78 gdb_test continue ".*print_string.*"
  79 gdb_test next ".*0 = 0.*"
  80
  81 # Traverse part of bigcore's linked list of memory chunks (forward or
  82 # backward), saving each chunk's address.
  83
  84 proc extract_heap { dir } {
  85     global gdb_prompt
  86     global expect_out
  87     set heap ""
  88     set test "extract ${dir} heap"
  89     set lim 0
  90     gdb_test_multiple "print heap.${dir}" "$test" {
  91         -re " = \\(struct list \\*\\) 0x0.*$gdb_prompt $" {
  92             pass "$test"
  93         }
  94         -re " = \\(struct list \\*\\) (0x\[0-9a-f\]*).*$gdb_prompt $" {
  95             set heap [concat $heap $expect_out(1,string)]
  96             if { $lim >= 200 } {
  97                 pass "$test (stop at $lim)"
  98             } else {
  99                 incr lim
 100                 send_gdb "print \$.${dir}\n"
 101                 exp_continue
 102             }
 103         }
 104         -re ".*$gdb_prompt $" {
 105             fail "$test (entry $lim)"
 106         }
 107         timeout {
 108             fail "$test (timeout)"
 109         }
 110     }
 111     return $heap;
 112 }
 113 set next_heap [extract_heap next]
 114 set prev_heap [extract_heap prev]
 115
 116 # Save the total allocated size within GDB so that we can check
 117 # the core size later.
 118 gdb_test_no_output "set \$bytes_allocated = bytes_allocated" "save heap size"
 119
 120 # Now create a core dump
 121
 122 # Rename the core file to "TESTFILE.corefile" rather than just "core",
 123 # to avoid problems with sys admin types that like to regularly prune
 124 # all files named "core" from the system.
 125
 126 # Some systems append "core" to the name of the program; others append
 127 # the name of the program to "core"; still others (like Linux, as of
 128 # May 2003) create cores named "core.PID".
 129
 130 # Save the process ID.  Some systems dump the core into core.PID.
 131 set test "grab pid"
 132 gdb_test_multiple "info program" $test {
 133     -re "child process (\[0-9\]+).*$gdb_prompt $" {
 134         set inferior_pid $expect_out(1,string)
 135         pass $test
 136     }
 137     -re "$gdb_prompt $" {
 138         set inferior_pid unknown
 139         pass $test
 140     }
 141 }
 142
 143 # Dump core using SIGABRT
 144 set oldtimeout $timeout
 145 set timeout 600
 146 gdb_test "signal SIGABRT" "Program terminated with signal SIGABRT, .*"
 147 set timeout $oldtimeout
 148
 149 # Find the corefile
 150 set file ""
 151 foreach pat [list core.${inferior_pid} ${testfile}.core core] {
 152     set names [glob -nocomplain $pat]
 153     if {[llength $names] == 1} {
 154         set file [lindex $names 0]
 155         remote_exec build "mv $file $corefile"
 156         break
 157     }
 158 }
 159
 160 if { $file == "" } {
 161     untested "Can't generate a core file"
 162     return 0
 163 }
 164
 165 # Check that the corefile is plausibly large enough.  We're trying to
 166 # detect the case where the operating system has truncated the file
 167 # just before signed wraparound.  TCL, unfortunately, has a similar
 168 # problem - so use catch.  It can handle the "bad" size but not
 169 # necessarily the "good" one.  And we must use GDB for the comparison,
 170 # similarly.
 171
 172 if {[catch {file size $corefile} core_size] == 0} {
 173     set core_ok 0
 174     gdb_test_multiple "print \$bytes_allocated < $core_size" "check core size" {
 175         -re " = 1\r\n$gdb_prompt $" {
 176             pass "check core size"
 177             set core_ok 1
 178         }
 179         -re " = 0\r\n$gdb_prompt $" {
 180             pass "check core size"
 181             set core_ok 0
 182         }
 183     }
 184 } {
 185     # Probably failed due to the TCL build having problems with very
 186     # large values.  Since GDB uses a 64-bit off_t (when possible) it
 187     # shouldn't have this problem.  Assume that things are going to
 188     # work.  Without this assumption the test is skiped on systems
 189     # (such as i386 GNU/Linux with patched kernel) which do pass.
 190     pass "check core size"
 191     set core_ok 1
 192 }
 193 if {! $core_ok} {
 194     untested "check core size (system does not support large corefiles)"
 195     return 0
 196 }
 197
 198 # Now load up that core file
 199
 200 set test "load corefile"
 201 gdb_test_multiple "core $corefile" "$test" {
 202     -re "A program is being debugged already.  Kill it. .y or n. " {
 203         send_gdb "y\n"
 204         exp_continue
 205     }
 206     -re "Core was generated by.*$gdb_prompt $" {
 207         pass "$test"
 208     }
 209 }
 210
 211 # Finally, re-traverse bigcore's linked list, checking each chunk's
 212 # address against the executable.  Don't use gdb_test_multiple as want
 213 # only one pass/fail.  Don't use exp_continue as the regular
 214 # expression involving $heap needs to be re-evaluated for each new
 215 # response.
 216
 217 proc check_heap { dir heap } {
 218     global gdb_prompt
 219     set test "check ${dir} heap"
 220     set ok 1
 221     set lim 0
 222     send_gdb "print heap.${dir}\n"
 223     while { $ok } {
 224         gdb_expect {
 225             -re " = \\(struct list \\*\\) [lindex $heap $lim].*$gdb_prompt $" {
 226                 if { $lim >= [llength $heap] } {
 227                     pass "$test"
 228                     set ok 0
 229                 } else {
 230                     incr lim
 231                     send_gdb "print \$.${dir}\n"
 232                 }
 233             }
 234             -re ".*$gdb_prompt $" {
 235                 fail "$test (address [lindex $heap $lim])"
 236                 set ok 0
 237             }
 238             timeout {
 239                 fail "$test (timeout)"
 240                 set ok 0
 241             }
 242         }
 243     }
 244 }
 245
 246 check_heap next $next_heap
 247 check_heap prev $prev_heap