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Bug #9079 PHP seg faults in alloca() at first PHP request to Apache
Submitted: 2001-02-02 11:48 UTC Modified: 2001-02-09 15:08 UTC
From: mchampagne at capis dot com Assigned:
Status: Closed Package: Scripting Engine problem
PHP Version: 4.0.4pl1 OS: AIX 4.3.3
Private report: No CVE-ID: None
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 [2001-02-02 11:48 UTC] mchampagne at capis dot com 
We are running Oracle IAS 1.0.0.0 on AIX 4.3.3.  Oracle's IAS runs Apache 1.3.9 and the root Apache directory is in /ias/Apache/Apache.  We have a soft link from /usr/local/apache -> /ias/Apache.  We are installing our PHP source from /usr/tools/src/php-4.0.4pl1/ and I believe the config script uses /usr/local as it's prefix?  We ran make and make install and we bring up Apache with mod_php successfully.  At the first request however, php cores in the /ias/Apache/Apache directory.  The request is simply running phpinfo().  I see the following message in our httpds_error_log:

[Fri Feb  2 11:26:34 2001] [notice] Apache/1.3.9 (Unix) PHP/4.0.4pl1 mod_perl/1.21 ApacheJServ/1.1 configured --
 resuming normal operations
[Fri Feb  2 11:26:58 2001] [notice] child pid 17026 exit signal Segmentation fault (11)

Here's what I see in the core file:

Segmentation fault in sig_coredump at 0x10003824
0x10003824 (sig_coredump+0x3c) 80410014          l   r2,0x14(r1)

(dbx) where
sig_coredump(0xb) at 0x10003824
alloca() at 0xd36ccef8
php_execute_script(0x2ff22530), line 1181 in "main.c"
apache_php_module_main(0x20255e30, 0x0), line 89 in "sapi_apache.c"
send_php(0x20255e30, 0x0, 0x20257dc0), line 516 in "mod_php4.c"
send_parsed_php(0x20255e30), line 527 in "mod_php4.c"
ap_invoke_handler(0x20255e30) at 0x100c3138
process_request_internal(0x20255e30) at 0x100edf8c
ap_process_request(0x20255e30) at 0x100ef4f8
child_main(0x0) at 0x10002058
make_child(0x2004ed20, 0x0, 0x3a7adfba) at 0x10001a18
startup_children(0x5) at 0x10001804
standalone_main(0x3, 0x2ff229e8) at 0x10000d24
http_main.main(0x3, 0x2ff229e8) at 0x100008c8

Our configure scripts is run with:
configure --with-apxs=/ias/Apache/Apache/bin/apxs --with-oci8=/ias/6iserver --without-mysql

We also made the modification to libtool in bug 4360 and tried again but we get the same as above.

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 [2001-02-08 11:46 UTC] mchampagne at capis dot com 
Do you guys have any ideas what this is?  I can keep trying different things on this but I don't have a direction.  We are desperate to run PHP.  I did try installing to our actual Apache directory instead of soft linking /usr/local and we came up with the same thing.

Mike
 [2001-02-08 14:16 UTC] mchampagne at capis dot com 
I see this snippet in my config.log where it's not finding alloca.h.  I did not find alloca.h in the PHP source tree or anywhere on my system.

configure:5777: checking for alloca.h
configure:5787: cc -E  -DAIX=43 -DMOD_SSL=204110 -DEAPI -DUSE_EXPAT conftest.c >/dev/null 2>conftest.out
"configure", line 5783.10: 1506-296 (S) #include file <alloca.h> not found.
configure: failed program was:
#line 5782 "configure"
#include "confdefs.h"
#include <alloca.h>
configure:5777: checking for arpa/inet.h
configure:5787: cc -E  -DAIX=43 -DMOD_SSL=204110 -DEAPI -DUSE_EXPAT conftest.c >/dev/null 2>conftest.out
configure:5777: checking for crypt.h
 [2001-02-08 14:32 UTC] mchampagne at capis dot com 
I see this snippet in my config.log where it's not finding alloca.h.  I did not find alloca.h in the PHP source tree or anywhere on my system.

configure:5777: checking for alloca.h
configure:5787: cc -E  -DAIX=43 -DMOD_SSL=204110 -DEAPI -DUSE_EXPAT conftest.c >/dev/null 2>conftest.out
"configure", line 5783.10: 1506-296 (S) #include file <alloca.h> not found.
configure: failed program was:
#line 5782 "configure"
#include "confdefs.h"
#include <alloca.h>
configure:5777: checking for arpa/inet.h
configure:5787: cc -E  -DAIX=43 -DMOD_SSL=204110 -DEAPI -DUSE_EXPAT conftest.c >/dev/null 2>conftest.out
configure:5777: checking for crypt.h
 [2001-02-09 15:08 UTC] mchampagne at capis dot com 
We undefined HAS_ALLOCA from all the makefiles, recompiled and this fixed our problem.  One of our compiler gurus here says we could add '-ma' to the compiler flags to get around this problem.  AIX 4.3.3 apparently does not have alloca() and the PHP configure script thinks it does.

Mike
 
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