1# Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2004
2# 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 2 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, write to the Free Software
16# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17
18# Please email any bugs, comments, and/or additions to this file to:
19# bug-gdb@prep.ai.mit.edu
20
21# This file is based on corefile.exp which was written by Fred
22# Fish. (fnf@cygnus.com)
23
24if $tracelevel then {
25	strace $tracelevel
26}
27
28set prms_id 0
29set bug_id 0
30
31# Are we on a target board?  As of 2004-02-12, GDB didn't have a
32# mechanism that would let it efficiently access a remote corefile.
33
34if ![isnative] then {
35    untested "Remote system"
36    return
37}
38
39# Can the system run this test (in particular support sparse
40# corefiles)?  On systems that lack sparse corefile support this test
41# consumes too many resources - gigabytes worth of disk space and and
42# I/O bandwith.
43
44if { [istarget "*-*-*bsd*"]
45     || [istarget "*-*-hpux*"]
46     || [istarget "*-*-solaris*"]
47     || [istarget "*-*-cygwin*"] } {
48    untested "Kernel lacks sparse corefile support (PR gdb/1551)"
49    return
50}
51
52# This testcase causes too much stress (in terms of memory usage)
53# on certain systems...
54if { [istarget "*-*-*irix*"] } {
55    untested "Testcase too stressful for this system"
56    return
57}
58
59set testfile "bigcore"
60set srcfile ${testfile}.c
61set binfile ${objdir}/${subdir}/${testfile}
62set corefile ${objdir}/${subdir}/${testfile}.corefile
63
64if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
65     gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail."
66}
67
68# Run GDB on the bigcore program up-to where it will dump core.
69
70gdb_exit
71gdb_start
72gdb_reinitialize_dir $srcdir/$subdir
73gdb_load ${binfile}
74gdb_test "set print sevenbit-strings" "" \
75	"set print sevenbit-strings; ${testfile}"
76gdb_test "set width 0" "" \
77	"set width 0; ${testfile}"
78if { ![runto_main] } then {
79    gdb_suppress_tests;
80}
81set print_core_line [gdb_get_line_number "Dump core"]
82gdb_test "tbreak $print_core_line"
83gdb_test continue ".*print_string.*"
84gdb_test next ".*0 = 0.*"
85
86# Traverse part of bigcore's linked list of memory chunks (forward or
87# backward), saving each chunk's address.
88
89proc extract_heap { dir } {
90    global gdb_prompt
91    global expect_out
92    set heap ""
93    set test "extract ${dir} heap"
94    set lim 0
95    gdb_test_multiple "print heap.${dir}" "$test" {
96	-re " = \\(struct list \\*\\) 0x0.*$gdb_prompt $" {
97	    pass "$test"
98	}
99	-re " = \\(struct list \\*\\) (0x\[0-9a-f\]*).*$gdb_prompt $" {
100	    set heap [concat $heap $expect_out(1,string)]
101	    if { $lim >= 50 } {
102		pass "$test (stop at $lim)"
103	    } else {
104		incr lim
105		send_gdb "print \$.${dir}\n"
106		exp_continue
107	    }
108	}
109	-re ".*$gdb_prompt $" {
110	    fail "$test (entry $lim)"
111	}
112	timeout {
113	    fail "$test (timeout)"
114	}
115    }
116    return $heap;
117}
118set next_heap [extract_heap next]
119set prev_heap [extract_heap prev]
120
121# Now create a core dump
122
123# Rename the core file to "TESTFILE.corefile" rather than just "core",
124# to avoid problems with sys admin types that like to regularly prune
125# all files named "core" from the system.
126
127# Some systems append "core" to the name of the program; others append
128# the name of the program to "core"; still others (like Linux, as of
129# May 2003) create cores named "core.PID".
130
131# Save the process ID.  Some systems dump the core into core.PID.
132set test "grab pid"
133gdb_test_multiple "info program" $test {
134    -re "child process (\[0-9\]+).*$gdb_prompt $" {
135	set inferior_pid $expect_out(1,string)
136	pass $test
137    }
138    -re "$gdb_prompt $" {
139	set inferior_pid unknown
140	pass $test
141    }
142}
143
144# Dump core using SIGABRT
145set oldtimeout $timeout
146set timeout 600
147gdb_test "signal SIGABRT" "Program terminated with signal SIGABRT, .*"
148
149# Find the corefile
150set file ""
151foreach pat [list core.${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
160if { $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
172if {[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    }
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}
189if {! $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
196set test "load corefile"
197gdb_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
213proc 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
242check_heap next $next_heap
243check_heap prev $prev_heap
244