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2004-02-16 Andrew Cagney <cagney@redhat.com>

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* gdb.base/bigcore.exp: New file.
	* gdb.base/bigcore.c: New file.
This commit is contained in:
Andrew Cagney 2004-02-16 18:49:09 +00:00
parent d7ce59e3ac
commit 2d822687d5
3 changed files with 400 additions and 0 deletions
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5
gdb/testsuite/ChangeLog
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2004-02-16 Andrew Cagney <cagney@redhat.com>
* gdb.base/bigcore.exp: New file.
* gdb.base/bigcore.c: New file.
2004-02-13 Andrew Cagney <cagney@redhat.com>
* gdb.mi/mi1-basics.exp, gdb.mi/mi1-break.exp: Delete file.

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gdb/testsuite/gdb.base/bigcore.c Normal file
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/* This testcase is part of GDB, the GNU debugger.
Copyright 2004 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 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Please email any bugs, comments, and/or additions to this file to:
bug-gdb@prep.ai.mit.edu */
#include <unistd.h>
#include <stdlib.h>
#include <sys/resource.h>
/* Print routines:
The following are so that printf et.al. can be avoided. Those
might try to use malloc() and that, for this code, would be a
disaster. */
#define printf do not use
const char digit[] = "0123456789abcdefghijklmnopqrstuvwxyz";
static void
print_char (char c)
{
write (1, &c, sizeof (c));
}
static void
print_unsigned (unsigned long u)
{
if (u >= 10)
print_unsigned (u / 10);
print_char (digit[u % 10]);
}
static void
print_hex (unsigned long u)
{
if (u >= 16)
print_hex (u / 16);
print_char (digit[u % 16]);
}
static void
print_string (const char *s)
{
for (; (*s) != '\0'; s++)
print_char ((*s));
}
static void
print_address (const void *a)
{
print_string ("0x");
print_hex ((unsigned long) a);
}
/* Print the current values of RESOURCE. */
static void
print_rlimit (int resource)
{
struct rlimit rl;
getrlimit (resource, &rl);
print_string ("cur=0x");
print_hex (rl.rlim_cur);
print_string (" max=0x");
print_hex (rl.rlim_max);
}
static void
maximize_rlimit (int resource, const char *prefix)
{
struct rlimit rl;
print_string (" ");
print_string (prefix);
print_string (": ");
print_rlimit (resource);
getrlimit (resource, &rl);
rl.rlim_cur = rl.rlim_max;
setrlimit (resource, &rl);
print_string (" -> ");
print_rlimit (resource);
print_string ("\n");
}
/* Maintain a doublely linked list. */
struct list
{
struct list *next;
struct list *prev;
size_t size;
};
/* Put the "heap" in the DATA section. That way it is more likely
that the variable will occur early in the core file (an address
before the heap) and hence more likely that GDB will at least get
its value right.
To simplify the list append logic, start the heap out with one
entry (that lives in the BSS section). */
static struct list dummy;
static struct list heap = { &dummy, &dummy };
int
main ()
{
size_t max_chunk_size;
/* Try to expand all the resource limits beyond the point of sanity
- we're after the biggest possible core file. */
print_string ("Maximize resource limits ...\n");
#ifdef RLIMIT_CORE
maximize_rlimit (RLIMIT_CORE, "core");
#endif
#ifdef RLIMIT_DATA
maximize_rlimit (RLIMIT_DATA, "data");
#endif
#ifdef RLIMIT_STACK
maximize_rlimit (RLIMIT_STACK, "stack");
#endif
#ifdef RLIMIT_AS
maximize_rlimit (RLIMIT_AS, "stack");
#endif
/* Compute an initial chunk size. The math is dodgy but it works
for the moment. Perhaphs there's a constant around somewhere. */
{
size_t tmp;
for (tmp = 1; tmp > 0; tmp <<= 1)
max_chunk_size = tmp;
}
/* Allocate as much memory as possible creating a linked list of
each section. The linking ensures that some, but not all, the
memory is allocated. NB: Some kernels handle this efficiently -
only allocating and writing out referenced pages leaving holes in
the file for unreferend pages - while others handle this poorly -
writing out all pages including those that wern't referenced. */
print_string ("Alocating the entire heap ...\n");
{
size_t chunk_size;
long bytes_allocated = 0;
long chunks_allocated = 0;
/* Create a linked list of memory chunks. Start with
MAX_CHUNK_SIZE blocks of memory and then try allocating smaller
and smaller amounts until all (well at least most) memory has
been allocated. */
for (chunk_size = max_chunk_size;
chunk_size >= sizeof (struct list);
chunk_size >>= 1)
{
unsigned long count = 0;
print_string (" ");
print_unsigned (chunk_size);
print_string (" bytes ... ");
while (1)
{
struct list *chunk = malloc (chunk_size);
if (chunk == NULL)
break;
chunk->size = chunk_size;
/* Link it in. */
chunk->next = NULL;
chunk->prev = heap.prev;
heap.prev->next = chunk;
heap.prev = chunk;
count++;
}
print_unsigned (count);
print_string (" chunks\n");
chunks_allocated += count;
bytes_allocated += chunk_size * count;
}
print_string ("Total of ");
print_unsigned (bytes_allocated);
print_string (" bytes ");
print_unsigned (chunks_allocated);
print_string (" chunks\n");
}
/* Push everything out to disk. */
print_string ("Dump core ....\n");
*(char*)0 = 0;
}

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gdb/testsuite/gdb.base/bigcore.exp Normal file
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# Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2004
# 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 2 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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# Please email any bugs, comments, and/or additions to this file to:
# bug-gdb@prep.ai.mit.edu
# 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 "*-*-netbsd*"] } {
untested "Kernel lacks sparse corefile support (PR gdb/1551)"
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}" "${binfile}" executable {debug}] != "" } {
gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail."
}
# Create a core file named "TESTFILE.corefile" rather than just
# "core", to avoid problems with sys admin types that like to
# regularly prune all files named "core" from the system.
# Some systems append "core" to the name of the program; others append
# the name of the program to "core"; still others (like Linux, as of
# May 2003) create cores named "core.PID". In the latter case, we
# could have many core files lying around, and it may be difficult to
# tell which one is ours, so let's run the program in a subdirectory.
set found 0
set coredir "${objdir}/${subdir}/coredir.[getpid]"
file mkdir $coredir
catch "system \"(cd ${coredir}; ${binfile}; true) >/dev/null 2>&1\""
set names [glob -nocomplain -directory $coredir *core*]
if {[llength $names] == 1} {
set file [file join $coredir [lindex $names 0]]
remote_exec build "mv $file $corefile"
set found 1
}
# Try to clean up after ourselves.
remote_file build delete [file join $coredir coremmap.data]
remote_exec build "rmdir $coredir"
if { $found == 0 } {
warning "can't generate a core file - core tests suppressed - check ulimit -c"
return 0
}
# 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. I don't know why but
# expect_out didn't work with gdb_test_multiple.
proc extract_heap { dir } {
global gdb_prompt
global expect_out
set heap ""
set test "extract ${dir} heap"
set lim 0
send_gdb "print heap.${dir}\n"
gdb_expect {
-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 { $lim >= 50 } {
pass "$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]
# 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