Hello there,
I'm trying to debug a crash/segmentation fault in php-4.4.{4-6} that we've
been so far unable to get rid of. I guess it's c-client, but I'd like to
be shure.
I have finally gotten so far that I've managed to get a core-dump. But the
backtrace says "no symbol table info available", even though I have
compiled php --with-debug. I have even tried with CFLAGS="-ggdb" but
nothing helps.
nm doesn't report any symbols:
# nm php-4.4.*/libs/libphp4.so
php-4.4.6/libs/libphp4.so:
004ddf20 D php4_module
So, the question, how do I get debugging symbols into the php shared
object? Thanks..
I do seem to get debug info into apache's error_log:
/usr/local/src/php-4.4.6/ext/imap/php_imap.c(734) : Block 0x0864D0B8
status: Beginning: Overrun (magic=0x00000000, expected=0x7312F8DC)
[Fri Mar 2 15:07:42 2007] [notice] child pid 5106 exit signal Segmentation
fault (11)
But I'm unable to get any debugging symbols in the backtrace:
#0 0xb7e5c027 in raise () from /lib/tls/libc.so.6
(gdb) bt full
#0 0xb7e5c027 in raise () from /lib/tls/libc.so.6
No symbol table info available.
#1 0xb7e5d747 in abort () from /lib/tls/libc.so.6
No symbol table info available.
#2 0xb7842725 in ?? () from /usr/local/apache/libexec/libphp4.so
No symbol table info available.
#3 0xb7853dcb in ?? () from /usr/local/apache/libexec/libphp4.so
No symbol table info available.
#4 0xb787501c in ?? () from /usr/local/apache/libexec/libphp4.so
No symbol table info available.
#5 0xb7870efd in ?? () from /usr/local/apache/libexec/libphp4.so
No symbol table info available.
#6 0xb784fbc7 in ?? () from /usr/local/apache/libexec/libphp4.so
No symbol table info available.
#7 0xb7704cbd in ?? () from /usr/local/apache/libexec/libphp4.so
No symbol table info available.
#8 0xb782fcbb in ?? () from /usr/local/apache/libexec/libphp4.so
No symbol table info available.
#9 0xb782e10e in ?? () from /usr/local/apache/libexec/libphp4.so
No symbol table info available.
#10 0xb782e333 in ?? () from /usr/local/apache/libexec/libphp4.so
No symbol table info available.
#11 0xb782fdee in ?? () from /usr/local/apache/libexec/libphp4.so
No symbol table info available.
#12 0xb781ef41 in ?? () from /usr/local/apache/libexec/libphp4.so
No symbol table info available.
#13 0xb782872f in ?? () from /usr/local/apache/libexec/libphp4.so
No symbol table info available.
#14 0xb77f47bb in ?? () from /usr/local/apache/libexec/libphp4.so
No symbol table info available.
#15 0xb784060a in ?? () from /usr/local/apache/libexec/libphp4.so
No symbol table info available.
---Type <return> to continue, or q <return> to quit---
#16 0x080522cf in run_cleanups ()
No symbol table info available.
#17 0x08050a0a in ap_clear_pool ()
No symbol table info available.
#18 0x08050a87 in ap_destroy_pool ()
No symbol table info available.
#19 0x080509dd in ap_clear_pool ()
No symbol table info available.
#20 0x08061825 in child_main ()
No symbol table info available.
#21 0x08061f16 in make_child ()
No symbol table info available.
#22 0x0806225d in perform_idle_server_maintenance ()
No symbol table info available.
#23 0x08062874 in standalone_main ()
No symbol table info available.
#24 0x08062e94 in main ()
No symbol table info available.
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