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# Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2004, 2005,

# 2007, 2008, 2009, 2010 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 3 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program.  If not, see .

# This file is based on corefile.exp which was written by Fred

# Fish. (fnf@cygnus.com)

if $tracelevel then {

        strace $tracelevel

}

set prms_id 0

set bug_id 0

# Are we on a target board?  As of 2004-02-12, GDB didn't have a

# mechanism that would let it efficiently access a remote corefile.

if ![isnative] then {

    untested "Remote system"

    return

}

# Can the system run this test (in particular support sparse

# corefiles)?  On systems that lack sparse corefile support this test

# consumes too many resources - gigabytes worth of disk space and and

# I/O bandwith.

if { [istarget "*-*-*bsd*"]

     || [istarget "*-*-hpux*"]

     || [istarget "*-*-solaris*"]

     || [istarget "*-*-darwin*"]

     || [istarget "*-*-cygwin*"] } {

    untested "Kernel lacks sparse corefile support (PR gdb/1551)"

    return

}

# This testcase causes too much stress (in terms of memory usage)

# on certain systems...

if { [istarget "*-*-*irix*"] } {

    untested "Testcase too stressful for this system"

    return

}

set testfile "bigcore"

set srcfile ${testfile}.c

set binfile ${objdir}/${subdir}/${testfile}

set corefile ${objdir}/${subdir}/${testfile}.corefile

if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {

     untested bigcore.exp

     return -1

}

# Run GDB on the bigcore program up-to where it will dump core.

gdb_exit

gdb_start

gdb_reinitialize_dir $srcdir/$subdir

gdb_load ${binfile}

gdb_test "set print sevenbit-strings" "" \

        "set print sevenbit-strings; ${testfile}"

gdb_test "set width 0" "" \

        "set width 0; ${testfile}"

if { ![runto_main] } then {

    gdb_suppress_tests;

}

set print_core_line [gdb_get_line_number "Dump core"]

gdb_test "tbreak $print_core_line"

gdb_test continue ".*print_string.*"

gdb_test next ".*0 = 0.*"

# Traverse part of bigcore's linked list of memory chunks (forward or

# backward), saving each chunk's address.

proc extract_heap { dir } {

    global gdb_prompt

    global expect_out

    set heap ""

    set test "extract ${dir} heap"

    set lim 0

    gdb_test_multiple "print heap.${dir}" "$test" {

        -re " = \\(struct list \\*\\) 0x0.*$gdb_prompt $" {

            pass "$test"

        }

        -re " = \\(struct list \\*\\) (0x\[0-9a-f\]*).*$gdb_prompt $" {

            set heap [concat $heap $expect_out(1,string)]

            if { $lim >= 200 } {

                pass "$test (stop at $lim)"

            } else {

                incr lim

                send_gdb "print \$.${dir}\n"

                exp_continue

            }

        }

        -re ".*$gdb_prompt $" {

            fail "$test (entry $lim)"

        }

        timeout {

            fail "$test (timeout)"

        }

    }

    return $heap;

}

set next_heap [extract_heap next]

set prev_heap [extract_heap prev]

# Save the total allocated size within GDB so that we can check

# the core size later.

gdb_test "set \$bytes_allocated = bytes_allocated" "" "save heap size"

# Now create a core dump

# Rename the core file to "TESTFILE.corefile" rather than just "core",

# to avoid problems with sys admin types that like to regularly prune

# all files named "core" from the system.

# Some systems append "core" to the name of the program; others append

# the name of the program to "core"; still others (like Linux, as of

# May 2003) create cores named "core.PID".

# Save the process ID.  Some systems dump the core into core.PID.

set test "grab pid"

gdb_test_multiple "info program" $test {

    -re "child process (\[0-9\]+).*$gdb_prompt $" {

        set inferior_pid $expect_out(1,string)

        pass $test

    }

    -re "$gdb_prompt $" {

        set inferior_pid unknown

        pass $test

    }

}

# Dump core using SIGABRT

set oldtimeout $timeout

set timeout 600

gdb_test "signal SIGABRT" "Program terminated with signal SIGABRT, .*"

set timeout $oldtimeout

# Find the corefile

set file ""

foreach pat [list core.${inferior_pid} ${testfile}.core core] {

    set names [glob -nocomplain $pat]

    if {[llength $names] == 1} {

        set file [lindex $names 0]

        remote_exec build "mv $file $corefile"

        break

    }

}

if { $file == "" } {

    untested "Can't generate a core file"

    return 0

}

# Check that the corefile is plausibly large enough.  We're trying to

# detect the case where the operating system has truncated the file

# just before signed wraparound.  TCL, unfortunately, has a similar

# problem - so use catch.  It can handle the "bad" size but not

# necessarily the "good" one.  And we must use GDB for the comparison,

# similarly.

if {[catch {file size $corefile} core_size] == 0} {

    set core_ok 0

    gdb_test_multiple "print \$bytes_allocated < $core_size" "check core size" {

        -re " = 1\r\n$gdb_prompt $" {

            pass "check core size"

            set core_ok 1

        }

        -re " = 0\r\n$gdb_prompt $" {

            pass "check core size"

            set core_ok 0

        }

    }

} {

    # Probably failed due to the TCL build having problems with very

    # large values.  Since GDB uses a 64-bit off_t (when possible) it

    # shouldn't have this problem.  Assume that things are going to

    # work.  Without this assumption the test is skiped on systems

    # (such as i386 GNU/Linux with patched kernel) which do pass.

    pass "check core size"

    set core_ok 1

}

if {! $core_ok} {

    untested "check core size (system does not support large corefiles)"

    return 0

}

# Now load up that core file

set test "load corefile"

gdb_test_multiple "core $corefile" "$test" {

    -re "A program is being debugged already.  Kill it. .y or n. " {

        send_gdb "y\n"

        exp_continue

    }

    -re "Core was generated by.*$gdb_prompt $" {

        pass "$test"

    }

}

# Finally, re-traverse bigcore's linked list, checking each chunk's

# address against the executable.  Don't use gdb_test_multiple as want

# only one pass/fail.  Don't use exp_continue as the regular

# expression involving $heap needs to be re-evaluated for each new

# response.

proc check_heap { dir heap } {

    global gdb_prompt

    set test "check ${dir} heap"

    set ok 1

    set lim 0

    send_gdb "print heap.${dir}\n"

    while { $ok } {

        gdb_expect {

            -re " = \\(struct list \\*\\) [lindex $heap $lim].*$gdb_prompt $" {

                if { $lim >= [llength $heap] } {

                    pass "$test"

                    set ok 0

                } else {

                    incr lim

                    send_gdb "print \$.${dir}\n"

                }

            }

            -re ".*$gdb_prompt $" {

                fail "$test (address [lindex $heap $lim])"

                set ok 0

            }

            timeout {

                fail "$test (timeout)"

                set ok 0

            }

        }

    }

}

check_heap next $next_heap

check_heap prev $prev_heap