Hi all.
I have been having some problems with running PHP5 under the Continuity
webserver, which
I wrote the SAPI module for. 5 has been working well with the apps that
people
have been rolling out with Continuity so far, but one client has a
large, complicated application that they
have been trying to test on PHP5 on Solaris. When pages from the app
are hit it will randomly
crash after about 5 - 10 requests, depending. phpinfo() will serve all
day long without problems. Different
pages (and really, different complicated apps) will produce the crash.
A common denominator is that
they all use the OCI8 module to talk to Oracle, but I am not sure if
this is directly related.
It crashes like this on the CVS head and also RC3. I saw that there
were some changes "recently"
to zend_mm.c so I went back to RC1 and could not reproduce this crash,
but, there was a different
crash I had that I assume is unrelated and fixed at least by RC3.
I have just started to look at this myself and was wondering if this
jogs anyones memory or if
anyone has any pointer on where I might begin, I am not very familiar
with the memory allocator
in PHP. Also, should I open a bug on this?
Crash #1: (more common)
=>[1] zend_mm_remove_from_free_list(heap = 0x12aca0, mm_block =
0x1e5f8e0), line 163 in "zend_mm.c"
[2] zend_mm_free(heap = 0x12aca0, p = 0x1e5f988), line 362 in
"zend_mm.c"
[3] shutdown_memory_manager(silent = 0, full_shutdown = 0, tsrm_ls =
0x472d78), line 491 in "zend_alloc.c"
[4] php_request_shutdown(dummy = (nil)), line 1223 in "main.c"
[5] capi_module_main(request_context = 0x46cad8, tsrm_ls = 0x472d78),
line 451 in "capi.c"
[6] phpFservice(t = 0x10afe0, opts = 0xb7200), line 486 in "capi.c"
[7] dlFpipeline_exec(payload = 0x10afe0, catid = 4, limit_name =
0xfef05fb0 "type", limit_value = 0x46ca90 "PHP/5.0.0-dev"), line 316 in
"dl.c"
[8] httpFhandler(0x3888510, 0x0, 0xff051a00, 0x0, 0x0, 0x0), at
0xfef03050
[9] thrFthread(arg = 0x1cf33d8), line 529 in "thr.c"
mm_block = 0x1e5f8e0
func = "zend_mm_remove_from_free_list"
heap = 0x12aca0
*mm_block = {
size = 0
type = 0
prev_size = 0
prev_free_block = 0x47
next_free_block = (nil)
}
=============================================
Crash #2: (less common)
=>[1] zend_mm_alloc(heap = 0x122c90, size = 264U), line 308 in
"zend_mm.c"
[2] _emalloc(size = 256U), line 182 in "zend_alloc.c"
[3] zend_stack_init(stack = 0xf9688), line 28 in "zend_stack.c"
[4] shutdown_executor(tsrm_ls = 0x30d1d8), line 232 in
"zend_execute_API.c"
[5] zend_deactivate(tsrm_ls = 0x30d1d8), line 819 in "zend.c"
[6] php_request_shutdown(dummy = (nil)), line 1212 in "main.c"
[7] capi_module_main(request_context = 0x30ca88, tsrm_ls = 0x30d1d8),
line 451 in "capi.c"
[8] phpFservice(t = 0x10afe0, opts = 0xb7200), line 486 in "capi.c"
[9] dlFpipeline_exec(payload = 0x10afe0, catid = 4, limit_name =
0xfef05fb0 "type", limit_value = 0x30ca58 "PHP/5.0.0-dev"), line 316 in
"dl.c"
[10] httpFhandler(0x3c927b8, 0x0, 0xff051a00, 0x0, 0x0, 0x0), at
0xfef03050
[11] thrFthread(arg = 0x2e367b0), line 529 in "thr.c"
free_list_bucket = 0xfdf63d3c
index = 35U
best_fit = 0x3179550
p = 0x7000000
true_size = 280U
size = 264U
func = "zend_mm_alloc"
heap = 0x122c90
(dbx) print *free_list_bucket
*free_list_bucket = 0x40000002
--
Alex Leigh - www.configuredlight.com
The difference between theory and reality
is that in theory there is no difference.