Date: Fri, 20 Oct 2000 15:59:32 -0700 (PDT)
From: netbsd alpha <netbsd_alpha@yahoo.com>
To: current netbsd <netbsd-current@netbsd.org>
Cc: Michael Widenius <monty@mysql.com>
Subject: memory management fault - core dumps

i'm on netbsd/alpha 1.5_alpha2. this server runs mysql
3.23.26-beta, apache 1.3.12, php 4.0.3pl1. when i load
up a web page driven by php, and i click reload really
fast about 30 or 40 times, mysql stops responding,
then i check the log and see that it core dumped. here
is the message from netbsd /var/log/messages:

Oct 20 13:08:23 ns01 /netbsd: fatal user trap:
Oct 20 13:08:24 ns01 /netbsd:
Oct 20 13:08:24 ns01 /netbsd:     trap entry = 0x2
(memory management fault)
Oct 20 13:08:24 ns01 /netbsd:     a0         =
0xa72f19
Oct 20 13:08:27 ns01 /netbsd:     a1         = 0x1
Oct 20 13:08:27 ns01 /netbsd:     a2         = 0x0
Oct 20 13:08:27 ns01 /netbsd:     pc         =
0x120105860
Oct 20 13:08:27 ns01 /netbsd:     ra         =
0x120105800
Oct 20 13:08:27 ns01 /netbsd:     curproc    =
0xfffffc000b4eaf10
Oct 20 13:08:27 ns01 /netbsd:         pid = 7934, comm
= mysqld
Oct 20 13:08:27 ns01 /netbsd:
Oct 20 13:08:27 ns01 /netbsd: pid 7934 (mysqld), uid
0: exited on signal 11 (core dumped)
Oct 20 17:18:55 ns01 /netbsd:
Oct 20 17:18:55 ns01 /netbsd: fatal user trap:
Oct 20 17:18:55 ns01 /netbsd:
Oct 20 17:18:58 ns01 /netbsd:     trap entry = 0x2
(memory management fault)
Oct 20 17:19:02 ns01 /netbsd:     a0         = 0xcd482
Oct 20 17:19:06 ns01 /netbsd:     a1         = 0x1
Oct 20 17:19:10 ns01 /netbsd:     a2         = 0x0
Oct 20 17:19:13 ns01 /netbsd:     pc         =
0x120105860
Oct 20 17:19:13 ns01 /netbsd:     ra         =
0x120105800
Oct 20 17:19:13 ns01 /netbsd:     curproc    =
0xfffffc000b4eaf10
Oct 20 17:19:13 ns01 /netbsd:         pid = 24795,
comm = mysqld
Oct 20 17:19:13 ns01 /netbsd:
Oct 20 17:19:13 ns01 /netbsd: pid 24795 (mysqld), uid
0: exited on signal 11 (core dumped)

here is gdb's results:

# gdb /usr/local/libexec/mysqld /var/mysql/mysqld.core
GNU gdb 4.17
Copyright 1998 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General
Public License, and you are
welcome to change it and/or distribute copies of it
under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show
warranty" for details.
This GDB was configured as "alpha--netbsd"...
Core was generated by `mysqld'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /usr/libexec/ld.elf_so...done.
Reading symbols from /usr/lib/libz.so.0...done.
Reading symbols from /usr/lib/libcrypt.so.0...done.
Reading symbols from /usr/lib/libstdc++.so.2...done.
Reading symbols from /usr/lib/libm.so.0...done.
Reading symbols from /usr/lib/libc.so.12...done.
#0  0x1202211e8 in machdep_sys_sigprocmask () at
syscall-template.S:53
syscall-template.S:53: No such file or directory.

(gdb) backtrace
#0  0x1202211e8 in machdep_sys_sigprocmask () at
syscall-template.S:53
warning: Hit heuristic-fence-post without finding
warning: enclosing function for address 0x124e349d0
This warning occurs if you are debugging a function
without any symbols
(for example, in a stripped executable).  In that
case, you may wish to
increase the size of the search with the `set
heuristic-fence-post' command.

Otherwise, you told GDB there was a function where
there isn't one, or
(more likely) you have encountered a bug in GDB.
(gdb)(gdb) backtrace
#0  0x1202211e8 in machdep_sys_sigprocmask () at
syscall-template.S:53
warning: Hit heuristic-fence-post without finding
warning: enclosing function for address 0x124e349d0
This warning occurs if you are debugging a function
without any symbols
(for example, in a stripped executable).  In that
case, you may wish to
increase the size of the search with the `set
heuristic-fence-post' command.

Otherwise, you told GDB there was a function where
there isn't one, or
(more likely) you have encountered a bug in GDB.
(gdb)

so it's missing syscall-template.S? from the source,
it seem's like it's the MIT-pthreads included with
mysql.

anyone suggest  a fix?

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