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From Magnus Mtt <n0v...@kiruna.se>
Subject Segfault
Date Mon, 11 Nov 2002 21:59:11 GMT
Hi!

I have no idea if this problem is Apache2 related or PHP related.
Running current CVS of both.

I have no single script to reproduce this, but i have the same
problem with older versions of PHP too, haven't tried with older apache
version thou.

And I don't know if this is the correct way to debug apache, but here's
the output from gdb.


Program received signal SIGPIPE, Broken pipe.
[Switching to Thread 65541 (LWP 3069)]
0x403756d8 in writev () from /lib/libc.so.6
(gdb) bt
#0  0x403756d8 in writev () from /lib/libc.so.6
#1  0x401f5b98 in apr_sendv (sock=0x413818e0, vec=0xbf1ff604, nvec=1, len=0xbf1ff4d0) at sendrecv.c:235
#2  0x080bfa5a in writev_it_all (s=0x413818e0, vec=0xbf1ff604, nvec=1, len=49, nbytes=0xbf1ff55c)
at core.c:2695
#3  0x080c0f79 in core_output_filter (f=0x83af890, b=0x83bc790) at core.c:3957
#4  0x080b9de9 in ap_pass_brigade (next=0x83af890, bb=0x83bc790) at util_filter.c:540
#5  0x080744cc in BIO_bucket_flush (bio=0x83b8e50) at ssl_engine_io.c:134
#6  0x08074b81 in ssl_io_filter_Output (f=0x41381dd8, bb=0x8492c40) at ssl_engine_io.c:602
#7  0x080b9de9 in ap_pass_brigade (next=0x41381dd8, bb=0x8492c40) at util_filter.c:540
#8  0x08081d40 in chunk_filter (f=0x83c3038, b=0x8492c40) at http_core.c:260
#9  0x080b9de9 in ap_pass_brigade (next=0x83c3038, bb=0x8492c40) at util_filter.c:540
#10 0x080bbeef in ap_content_length_filter (f=0x842ac48, b=0x8492c40) at protocol.c:1299
#11 0x080b9de9 in ap_pass_brigade (next=0x842ac48, bb=0x8492c40) at util_filter.c:540
#12 0x4058a592 in php_output_filter (f=0x84914f0, bb=0x8492c40) at /mnt/data1/Apps/CVS/PHP/php4/sapi/apache2filter/sapi_apache2.c:483
#13 0x080b9de9 in ap_pass_brigade (next=0x84914f0, bb=0x8491630) at util_filter.c:540
#14 0x080c02f9 in default_handler (r=0x8429fa0) at core.c:3377
#15 0x080af319 in ap_run_handler (r=0x8429fa0) at config.c:194
#16 0x080af863 in ap_invoke_handler (r=0x8429fa0) at config.c:401
#17 0x08085cf6 in ap_process_request (r=0x8429fa0) at http_request.c:288
#18 0x08081dda in ap_process_http_connection (c=0x413819b8) at http_core.c:293
#19 0x080b8188 in ap_run_process_connection (c=0x413819b8) at connection.c:85
#20 0x080b841f in ap_process_connection (c=0x413819b8, csd=0x413818e0) at connection.c:207
#21 0x080ac5ab in process_socket (p=0x413818a8, sock=0x413818e0, my_child_num=0, my_thread_num=2,
bucket_alloc=0x82d8200) at worker.c:632
#22 0x080acbb7 in worker_thread (thd=0x8166c40, dummy=0x82d1b78) at worker.c:947
#23 0x401f885e in dummy_worker (opaque=0x8166c40) at thread.c:127
#24 0x4026d048 in pthread_start_thread () from /lib/libpthread.so.0
#25 0x4026d08e in pthread_start_thread_event () from /lib/libpthread.so.0
(gdb) s
Single stepping until exit from function writev,
which has no line number information.
apr_sendv (sock=0x413818e0, vec=0xbf1ff604, nvec=1, len=0xbf1ff4d0) at sendrecv.c:236
warning: Source file is more recent than executable.

236         } while (rv == -1 && errno == EINTR);
(gdb) p rv
$1 = -1
(gdb) p errno
$2 = 4
(gdb) p EINTR
No symbol "EINTR" in current context.


And a full bt:

#0  apr_sendv (sock=0x413818e0, vec=0xbf1ff604, nvec=1, len=0xbf1ff4d0) at sendrecv.c:236
        sock = (apr_socket_t *) 0x413818e0
        rv = -1
        requested_len = 49
        i = -1
#1  0x080bfa5a in writev_it_all (s=0x413818e0, vec=0xbf1ff604, nvec=1, len=49, nbytes=0xbf1ff55c)
at core.c:2695
        bytes_written = 0
        rv = -1
        n = 49
        i = 0
#2  0x080c0f79 in core_output_filter (f=0x83af890, b=0x83bc790) at core.c:3957
        nbytes = 49
        nvec_trailers = 0
        vec = {{iov_base = 0x83ba788, iov_len = 49}, {iov_base = 0x40049df8, iov_len = 1094196672},
{iov_base = 0x5, iov_len = 3206542980}, {
    iov_base = 0x5a5a5a5a, iov_len = 1515870810}, {iov_base = 0x5a5a5a5a, iov_len = 1073981917},
{iov_base = 0x840bec0, iov_len = 135089852}, {
    iov_base = 0x5, iov_len = 1073981797}, {iov_base = 0x840bec0, iov_len = 1515870810}, {iov_base
= 0x5a5a5a5a, iov_len = 1074182768}, {
    iov_base = 0x82d20d8, iov_len = 0}, {iov_base = 0x5a5a5a5a, iov_len = 1074824154}, {iov_base
= 0x40116548, iov_len = 137200128}, {
    iov_base = 0x8492c40, iov_len = 1515870810}, {iov_base = 0x40108901, iov_len = 1074881864},
{iov_base = 0xbf1ff6a4, iov_len = 1074825585}, {
    iov_base = 0x82d83b0, iov_len = 137200128}}
        flen = 0
        last_e = (apr_bucket *) 0x82d83b0
        e = (apr_bucket *) 0x82d83b0
        nvec = 1
        fd = (apr_file_t *) 0x0
        last_merged_bucket = (apr_bucket *) 0x0
        more = (apr_bucket_brigade *) 0x83afce0
        vec_trailers = {{iov_base = 0x80d4ebc, iov_len = 5}, {iov_base = 0x40049df8, iov_len
= 5}, {iov_base = 0x0, iov_len = 138460864}, {
    iov_base = 0x83c00fc, iov_len = 0}, {iov_base = 0x10, iov_len = 138217555}, {iov_base
= 0x5a5a5a5a, iov_len = 1515870810}, {iov_base = 0x5a5a5a5a,
    iov_len = 1073956605}, {iov_base = 0x840bec0, iov_len = 23}, {iov_base = 0x80d4ebc, iov_len
= 5}, {iov_base = 0x0, iov_len = 1515870810}, {
    iov_base = 0x5a5a5a5a, iov_len = 1073956428}, {iov_base = 0x40049df8, iov_len = 138460864},
{iov_base = 0x5, iov_len = 135089852}, {
    iov_base = 0x5a5a5a5a, iov_len = 1515870810}, {iov_base = 0x5a5a5a5a, iov_len = 1073946282},
{iov_base = 0x840bec0, iov_len = 23}}
        foffset = 0
        rv = 49
        c = (conn_rec *) 0x413819b8
        net = (core_net_rec *) 0x83af868
        ctx = (core_output_filter_ctx_t *) 0x83af910
#3  0x080b9de9 in ap_pass_brigade (next=0x83af890, bb=0x83bc790) at util_filter.c:540
        e = (apr_bucket *) 0xffffffff
        next = (ap_filter_t *) 0xbf1ff444
        bb = (apr_bucket_brigade *) 0xbf1ff604
#4  0x080744cc in BIO_bucket_flush (bio=0x83b8e50) at ssl_engine_io.c:134
        bio = (BIO *) 0xffffffff
        b = (BIO_bucket_t *) 0x83ba778
        e = (apr_bucket *) 0xbf1ff444
#5  0x08074b81 in ssl_io_filter_Output (f=0x41381dd8, bb=0x8492c40) at ssl_engine_io.c:602
        bb = (apr_bucket_brigade *) 0x8492c40
        status = 0
        ctx = (SSLFilterRec *) 0x41381dc0
#6  0x080b9de9 in ap_pass_brigade (next=0x41381dd8, bb=0x8492c40) at util_filter.c:540
        e = (apr_bucket *) 0xffffffff
        next = (ap_filter_t *) 0xbf1ff444
        bb = (apr_bucket_brigade *) 0xbf1ff604
#7  0x08081d40 in chunk_filter (f=0x83c3038, b=0x8492c40) at http_core.c:260
        bytes = 0
        eos = (apr_bucket *) 0x82d8360
        flush = (apr_bucket *) 0x0
        chunk_hdr = "ZZZZZZZZÐW<@8\237B\bÀW<@"
        b = (apr_bucket_brigade *) 0x8492c40
        c = (conn_rec *) 0x413819b8
        more = (apr_bucket_brigade *) 0x0
        e = (apr_bucket *) 0x82d82c0
        rv = -1
#8  0x080b9de9 in ap_pass_brigade (next=0x83c3038, bb=0x8492c40) at util_filter.c:540
        e = (apr_bucket *) 0xffffffff
        next = (ap_filter_t *) 0xbf1ff444
        bb = (apr_bucket_brigade *) 0xbf1ff604
#9  0x080bbeef in ap_content_length_filter (f=0x842ac48, b=0x8492c40) at protocol.c:1299
        b = (apr_bucket_brigade *) 0x8492c40
        r = (request_rec *) 0x8429fa0
        ctx = (struct content_length_ctx *) 0x83c2e80
        e = (apr_bucket *) 0x82d8360
        eos = 1
        eblock = APR_NONBLOCK_READ
#10 0x080b9de9 in ap_pass_brigade (next=0x842ac48, bb=0x8492c40) at util_filter.c:540
        e = (apr_bucket *) 0xffffffff
        next = (ap_filter_t *) 0xbf1ff444
        bb = (apr_bucket_brigade *) 0xbf1ff604
#11 0x4058a592 in php_output_filter (f=0x84914f0, bb=0x8492c40) at /mnt/data1/Apps/CVS/PHP/php4/sapi/apache2filter/sapi_apache2.c:483
        ctx = (php_struct *) 0x842b7e8
        b = (apr_bucket *) 0x82d82c0
        conf = (void *) 0x814e8a0
        p = 0x815bdd0 "¸½\025\b"
        tsrm_ls = (void ***) 0x83c05a0
#12 0x080b9de9 in ap_pass_brigade (next=0x84914f0, bb=0x8491630) at util_filter.c:540
        e = (apr_bucket *) 0xffffffff
        next = (ap_filter_t *) 0xbf1ff444
        bb = (apr_bucket_brigade *) 0xbf1ff604
#13 0x080c02f9 in default_handler (r=0x8429fa0) at core.c:3377
        c = (conn_rec *) 0x413819b8
        bb = (apr_bucket_brigade *) 0x8491630
        e = (apr_bucket *) 0x82d8360
        d = (core_dir_config *) 0x842bdc0
        errstatus = 139007540
        fd = (apr_file_t *) 0x8491558
        status = -1
        bld_content_md5 = 137200480
#14 0x080af319 in ap_run_handler (r=0x8429fa0) at config.c:194
        r = (request_rec *) 0x8429fa0
        pHook = (ap_LINK_handler_t *) 0xffffffff
        n = 11
        rv = -1
#15 0x080af863 in ap_invoke_handler (r=0x8429fa0) at config.c:401
        r = (request_rec *) 0x8429fa0
        handler = 0x815bdb8 "application/x-httpd-php"
        p = 0xffffffff <Address 0xffffffff out of bounds>
        result = 0
        old_handler = 0x0
#16 0x08085cf6 in ap_process_request (r=0x8429fa0) at http_request.c:288
        r = (request_rec *) 0x8429fa0
        access_status = -1
#17 0x08081dda in ap_process_http_connection (c=0x413819b8) at http_core.c:293
        c = (conn_rec *) 0x413819b8
        r = (request_rec *) 0x8429fa0
        csd_set = 1
        csd = (apr_socket_t *) 0x413818e0
#18 0x080b8188 in ap_run_process_connection (c=0x413819b8) at connection.c:85
        c = (conn_rec *) 0x413819b8
        pHook = (ap_LINK_process_connection_t *) 0xffffffff
        n = 0
        rv = -1
#19 0x080b841f in ap_process_connection (c=0x413819b8, csd=0x413818e0) at connection.c:207
        c = (conn_rec *) 0x413819b8
        csd = (void *) 0x413818e0
#20 0x080ac5ab in process_socket (p=0x413818a8, sock=0x413818e0, my_child_num=0, my_thread_num=2,
bucket_alloc=0x82d8200) at worker.c:632
        p = (apr_pool_t *) 0x413818a8
        sock = (apr_socket_t *) 0x413818e0
        my_child_num = -1088424444
        my_thread_num = -1088424892
        current_conn = (conn_rec *) 0x413819b8
        conn_id = 1094195640
        csd = 16
        sbh = (ap_sb_handle_t *) 0x413819b0
#21 0x080acbb7 in worker_thread (thd=0x8166c40, dummy=0x82d1b78) at worker.c:947
        dummy = (void *) 0xffffffff
        process_slot = 0
        thread_slot = 2
        csd = (apr_socket_t *) 0x413818e0
        bucket_alloc = (apr_bucket_alloc_t *) 0x82d8200
        last_ptrans = (apr_pool_t *) 0x0
        ptrans = (apr_pool_t *) 0x413818a8
        rv = -1
        is_idle = 0
#22 0x401f885e in dummy_worker (opaque=0x8166c40) at thread.c:127
        opaque = (void *) 0xffffffff
#23 0x4026d048 in pthread_start_thread () from /lib/libpthread.so.0
No symbol table info available.
#24 0x4026d08e in pthread_start_thread_event () from /lib/libpthread.so.0
No symbol table info available.


Regards
Magnus Määttä


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