gdb/testsuite/gdb.base/bigcore.exp

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