---- oh...@cox.net wrote: > > ---- Joe Lewis <j...@joe-lewis.com> wrote: > > On 6/21/12 7:32 PM, oh...@cox.net wrote: > > > ---- oh...@cox.net wrote: > > >> ---- Joe Lewis<j...@joe-lewis.com> wrote: > > >>> On 6/21/12 6:46 PM, oh...@cox.net wrote: > > >>>> ---- Joe Lewis<j...@joe-lewis.com> wrote: > > >>>>> On 6/21/12 5:49 PM, oh...@cox.net wrote: > > >>>>>> ---- oh...@cox.net wrote: > > >>>>>>> ---- Sorin Manolache<sor...@gmail.com> wrote: > > >>>>>>>> And I forgot to say: run gdb in some sort of environment where you > > >>>>>>>> see > > >>>>>>>> your current source code line and a couple of surrounding lines. > > >>>>>>>> You > > >>>>>>>> could achieve this with the "list" command, but I prefer running > > >>>>>>>> gdb in > > >>>>>>>> emacs and let emacs do the nice listing of source code in a > > >>>>>>>> different panel. > > >>>>>>>> > > >>>>>>>> S > > >>>>>>> Here's the function from my source. It's the original from > > >>>>>>> mod_headers.c, plus my printf: > > >>>>>>> > > >>>>>>> > > >>>>>>> static int header_post_config(apr_pool_t *pconf, apr_pool_t *plog, > > >>>>>>> apr_pool_t *ptemp, server_rec *s) > > >>>>>>> { > > >>>>>>> printf("In header_post_config\n"); > > >>>>>>> header_ssl_lookup = APR_RETRIEVE_OPTIONAL_FN(ssl_var_lookup); > > >>>>>>> return OK; > > >>>>>>> } > > >>>>>>> > > >>>>>>> Jim > > >>>>>> Hi, > > >>>>>> > > >>>>>> I was able to get the segfault to go away. Here's what I had to do: > > >>>>>> > > >>>>>> - Created /etc/ld.so.conf.d/my.conf, and added the directory where > > >>>>>> my libobaccess.so was > > >>>>>> - Run 'ldconfig' to activate. > > >>>>>> - In the apxs command, DON'T include the -L and -l arguments > > >>>>>> > > >>>>>> After that, Apache appears to start ok, without segfault :)!! > > >>>>>> > > >>>>>> Thanks for all of the great help, esp. the suggestion about checking > > >>>>>> "ldconfig -p". I still don't understand why, but I'm just glad that > > >>>>>> I can get past this piece so now I can debug my module :)... > > >>>>>> > > >>>>>> Later, > > >>>>>> Jim > > >>>>> I'm just glad this list is as good as it is! > > >>>>> > > >>>>> FYI, the ldconfig is the dynamic linker control, and those > > >>>>> /etc/ld.so.conf.d files provide additional search directories for the > > >>>>> linker to check in when loading a library. > > >>>>> > > >>>>> Joe > > >>>>> -- > > >>>>> http://www.silverhawk.net/ > > >>>> Hi, > > >>>> > > >>>> Sorry to report, but my earlier report was a "false positive" :)... > > >>>> > > >>>> I forgot that the mod_headers.c that I was doing the earlier testing > > >>>> with had all references to the libobaccess.so removed :(!! > > >>>> > > >>>> So, I'm still stuck with basically the same problem, now, working with > > >>>> my "full" code, with the calls in it: > > >>>> > > >>>> - If I compile with -L and -l, Apache segfaults when it starts > > >>>> > > >>>> - If I compile without -L and -l, then I get "undefined symbol" errors > > >>>> when I try to start Apache, e.g.: > > >>>> > > >>>> [root@apachemodule build-mod_headers]# /apps/httpd2222/bin/apachectl > > >>>> -k start -X > > >>>> httpd: Syntax error on line 84 of /apps/httpd2222/conf/httpd.conf: > > >>>> Cannot load /apps/httpd2222/modules/mod_headers.so into server: > > >>>> /apps/httpd2222/modules/mod_headers.so: undefined symbol: > > >>>> ObResource_isProtected > > >>>> > > >>>> That "ObResource_isProtected" should be a symbol in libobaccess.so, > > >>>> and in fact, if I do "nm --dynamic", I get: > > >>>> > > >>>> [root@apachemodule build-mod_headers]# nm --dynamic > > >>>> /apps/netpoint/lib64/libobaccess.so | grep "ObResource_isProtected" > > >>>> 00000000000a6d80 T ObResource_isProtected > > >>>> [root@apachemodule build-mod_headers]# > > >>>> > > >>>> > > >>>> I'm *assuming* that the reason for the "undefined symbol" error is > > >>>> that libobaccess.so is actually not being loaded, but then when I try > > >>>> to load libobaccess.so, either via -L and -l in the apxs, or using > > >>>> LoadFile in httpd.conf, I get the segfault (same gdb info, BTW). > > >>>> > > >>>> Catch-22? > > >>>> > > >>>> Sorry for the false alarm :(!! > > >>>> > > >>>> Jim > > >>>> > > >>>> > > >>> Not a catch-22. The -L and -l specify linker options when assembling > > >>> the code. The ldconfig is a run-time thing. If you are getting the > > >>> stderr messages, you are making it all the way into your library. I'd > > >>> suggest commenting out the following line and see if you get farther : > > >>> > > >>> header_ssl_lookup = APR_RETRIEVE_OPTIONAL_FN(ssl_var_lookup); > > >>> > > >>> That should tell you if the problem is the ssl_var_lookup. > > >>> > > >>> Joe > > >>> -- > > >>> http://www.silverhawk.net/ > > >> > > >> Hi, > > >> > > >> Thanks for the suggestion. I just tried what you suggested, and got a > > >> segfault when I started Apache with the modified module. > > >> > > >> Jim > > >> > > >> > > > Hi, > > > > > > As a reminder, here's the gdb with the library loaded: > > > > > > > > > (gdb) b header_post_config > > > Function "header_post_config" not defined. > > > Make breakpoint pending on future shared library load? (y or [n]) y > > > Breakpoint 1 (header_post_config) pending. > > > (gdb) run -d /apps/httpd2222/ -f /apps/httpd2222/conf/httpd.conf > > > Starting program: /apps/httpd2222/bin/httpd -d /apps/httpd2222/ -f > > > /apps/httpd2222/conf/httpd.conf > > > [Thread debugging using libthread_db enabled] > > > [New Thread 182897610272 (LWP 11317)] > > > Breakpoint 2 at 0x2a9751ea90: file mod_headers.c, line 1121. > > > Pending breakpoint "header_post_config" resolved > > > mod_headers-jl V0.09 - start calling OAM API > > > In register_hooks > > > In create_headers_dir_config > > > In create_headers_dir_config > > > In header_cmd > > > In header_inout_cmd > > > In parse_format_tag > > > In parse_misc_string > > > In create_headers_dir_config > > > In header_cmd > > > In header_inout_cmd > > > In parse_format_tag > > > In parse_misc_string > > > [Switching to Thread 182897610272 (LWP 11317)] > > > > > > Breakpoint 2, header_post_config (pconf=0x573138, plog=0x5a52c8, > > > ptemp=0x5a72d8, s=0x59d3a8) at mod_headers.c:1121 > > > 1121 printf("In header_post_config\n"); > > > (gdb) n > > > 1120 { > > > (gdb) n > > > 1121 printf("In header_post_config\n"); > > > (gdb) n > > > In header_post_config > > > 1122 header_ssl_lookup = APR_RETRIEVE_OPTIONAL_FN(ssl_var_lookup); > > > (gdb) n > > > 1124 } > > > (gdb) n > > > 0x00000000004360c7 in ap_run_post_config (pconf=0x573138, plog=0x5a52c8, > > > ptemp=0x5a72d8, s=0x59d3a8) at config.c:91 > > > 91 AP_IMPLEMENT_HOOK_RUN_ALL(int, post_config, > > > (gdb) n > > > > > > Program received signal SIGSEGV, Segmentation fault. > > > 0x0000003518d6c1e1 in BN_num_bits () from /lib64/libcrypto.so.4 > > > > > > > > > So, it's actually blowing up in "BN_num_bits()" in /lib64/libcrypto.so.4? > > > > > > Jim > > When you see the : > > > > Program received signal SIGSEGV, Segmentation fault. > > 0x0000003518d6c1e1 in BN_num_bits () from /lib64/libcrypto.so.4 > > > > > > in gdb, type "bt" and hit enter. It should show the back trace and how > > you got to the BN_num_bits() function. > > > > Joe > > -- > > http://www.silverhawk.net/ > > > Hi, > > Here's the bt full: > > > In header_inout_cmd > In parse_format_tag > In parse_misc_string > [Switching to Thread 182897610272 (LWP 6676)] > > Breakpoint 2, header_post_config (pconf=0x573138, plog=0x5a52c8, > ptemp=0x5a72d8, s=0x59d3a8) at mod_headers.c:1121 > 1121 printf("In header_post_config\n"); > (gdb) n > 1120 { > (gdb) n > 1121 printf("In header_post_config\n"); > (gdb) n > In header_post_config > 1122 header_ssl_lookup = APR_RETRIEVE_OPTIONAL_FN(ssl_var_lookup); > (gdb) n > 1124 } > (gdb) n > 0x00000000004360c7 in ap_run_post_config (pconf=0x573138, plog=0x5a52c8, > ptemp=0x5a72d8, s=0x59d3a8) at config.c:91 > 91 AP_IMPLEMENT_HOOK_RUN_ALL(int, post_config, > (gdb) n > > Program received signal SIGSEGV, Segmentation fault. > 0x0000003518d6c1e1 in BN_num_bits () from /lib64/libcrypto.so.4 > (gdb) bt full > #0 0x0000003518d6c1e1 in BN_num_bits () from /lib64/libcrypto.so.4 > No symbol table info available. > #1 0x0000003518da8f4e in X509_ATTRIBUTE_create () from /lib64/libcrypto.so.4 > No symbol table info available. > #2 0x0000003518dadea2 in asn1_ex_i2c () from /lib64/libcrypto.so.4 > No symbol table info available. > #3 0x0000003518dadf79 in asn1_ex_i2c () from /lib64/libcrypto.so.4 > No symbol table info available. > #4 0x0000003518dae0e1 in ASN1_item_ex_i2d () from /lib64/libcrypto.so.4 > No symbol table info available. > #5 0x0000003518dae5f2 in ASN1_template_i2d () from /lib64/libcrypto.so.4 > No symbol table info available. > #6 0x0000003518dae28e in ASN1_item_ex_i2d () from /lib64/libcrypto.so.4 > No symbol table info available. > #7 0x0000003518dae3c6 in ASN1_item_i2d () from /lib64/libcrypto.so.4 > No symbol table info available. > #8 0x0000002a987d9d3a in ssl_pphrase_Handle (s=0x59d3a8, p=0x5a72d8) at > ssl_engine_pphrase.c:505 > mc = (SSLModConfigRec *) 0x571738 > sc = (SSLSrvConfigRec *) 0x668c38 > pServ = (server_rec *) 0x65fa48 > cpVHostID = 0x60add0 "www.example.com:443" > szPath = > "/apps/httpd2222/conf/certs/apache1.whatever.com.key\000\177\000\000\000Ü×ÿ¿\177\000\000\000à×ÿ¿\177", > '\0' <rep eats 15 times>, > "\001\000\000\000°åÿ¿\177\000\000\000;\000\000\000+\000\000\000\020Ûÿ¿\177", > '\0' <repeats 35 times>, "à\224k", ' > ---Type <return> to continue, or q <return> to quit--- > \0' <repeats 13 times>, > "øéÿ¿\177\000\000\000\020\000\000\000;\000\000\000\016\000\000\000\001\000\001\000\001", > '\0' <repeats 15 times>, "n\000\000\000\000\004\000\000°åÿ¿\177", '\0' > <repeats 11 times>, "\020Ûÿ¿\177\000\000\000+\000\000\000;", '\0' <repeats 35 > times>... > pPrivateKey = (EVP_PKEY *) 0x6ba670 > asn1 = Variable "asn1" is not available. > (gdb) > > > Not really sure what to make of that though :(... > > Jim
Hi, Ok, something interesting. I noticed that the servername in the gdb output was example.whatever.com, so I changed ServerName in extras/httpd-ssl.conf to "apache1.whatever.com". Apache still segfaulted after that. I noticed that igdb was showing my router IP address for "mod_unique_id" (whatever that is), so I thought it was because I didn't have the hostname in /etc/hosts. So, I added "apache1.whatever.com" to /etc/hosts, and also turned Apache LogLevel to debug, and now I get a different error: [root@apachemodule dev]# /apps/httpd2222/bin/apachectl -k start -X mod_headers-jl V0.09 - start calling OAM API In register_hooks In create_headers_dir_config In create_headers_dir_config In header_cmd In header_inout_cmd In parse_format_tag In parse_misc_string In create_headers_dir_config In header_cmd In header_inout_cmd In parse_format_tag In parse_misc_string In header_post_config *** glibc detected *** corrupted double-linked list: 0x00000000006b9710 *** /apps/httpd2222/bin/apachectl: line 78: 7599 Aborted $HTTPD $ARGV [root@apachemodule dev]# Here's the Apache error_log: [Thu Jun 21 23:24:11 2012] [info] mod_unique_id: using ip addr 72.215.225.9 [Thu Jun 21 23:24:12 2012] [info] Init: Seeding PRNG with 144 bytes of entropy [Thu Jun 21 23:24:12 2012] [info] Loading certificate & private key of SSL-aware server [Thu Jun 21 23:29:51 2012] [info] mod_unique_id: using ip addr 72.215.225.9 [Thu Jun 21 23:29:52 2012] [info] Init: Seeding PRNG with 144 bytes of entropy [Thu Jun 21 23:29:52 2012] [info] Loading certificate & private key of SSL-aware server [Thu Jun 21 23:29:56 2012] [info] mod_unique_id: using ip addr 72.215.225.9 [Thu Jun 21 23:29:57 2012] [info] Init: Seeding PRNG with 144 bytes of entropy [Thu Jun 21 23:29:57 2012] [info] Loading certificate & private key of SSL-aware server [root@apachemodule dev]# and here's the gdb backtrace: (gdb) b header_post_config Function "header_post_config" not defined. Make breakpoint pending on future shared library load? (y or [n]) y Breakpoint 1 (header_post_config) pending. (gdb) run -d /apps/httpd2222/ -f /apps/httpd2222/conf/httpd.conf Starting program: /apps/httpd2222/bin/httpd -d /apps/httpd2222/ -f /apps/httpd2222/conf/httpd.conf [Thread debugging using libthread_db enabled] [New Thread 182897610272 (LWP 7644)] Breakpoint 2 at 0x2a9751ea90: file mod_headers.c, line 1121. Pending breakpoint "header_post_config" resolved mod_headers-jl V0.09 - start calling OAM API In register_hooks In create_headers_dir_config In create_headers_dir_config In header_cmd In header_inout_cmd In parse_format_tag In parse_misc_string In create_headers_dir_config In header_cmd In header_inout_cmd In parse_format_tag In parse_misc_string [Switching to Thread 182897610272 (LWP 7644)] Breakpoint 2, header_post_config (pconf=0x573138, plog=0x5a52c8, ptemp=0x5a72d8, s=0x59d3a8) at mod_headers.c:1121 1121 printf("In header_post_config\n"); (gdb) n 1120 { (gdb) n 1121 printf("In header_post_config\n"); (gdb) n In header_post_config 1122 header_ssl_lookup = APR_RETRIEVE_OPTIONAL_FN(ssl_var_lookup); (gdb) n 1124 } (gdb) n 0x00000000004360c7 in ap_run_post_config (pconf=0x573138, plog=0x5a52c8, ptemp=0x5a72d8, s=0x59d3a8) at config.c:91 91 AP_IMPLEMENT_HOOK_RUN_ALL(int, post_config, (gdb) n *** glibc detected *** corrupted double-linked list: 0x00000000006b9710 *** Program received signal SIGABRT, Aborted. 0x000000351432e26d in raise () from /lib64/tls/libc.so.6 (gdb) bt full #0 0x000000351432e26d in raise () from /lib64/tls/libc.so.6 No symbol table info available. #1 0x000000351432fa6e in abort () from /lib64/tls/libc.so.6 No symbol table info available. #2 0x0000003514363641 in __libc_message () from /lib64/tls/libc.so.6 No symbol table info available. #3 0x0000003514369512 in _int_free () from /lib64/tls/libc.so.6 No symbol table info available. #4 0x0000003514369846 in free () from /lib64/tls/libc.so.6 No symbol table info available. #5 0x0000002a9790b6ba in R_free () from /apps/netpoint/lib64/libobaccess.so No symbol table info available. #6 0x0000002a9792bc41 in X509_CINF_free () from /apps/netpoint/lib64/libobaccess.so No symbol table info available. #7 0x0000002a9790ed98 in X509_free () from /apps/netpoint/lib64/libobaccess.so No symbol table info available. #8 0x0000002a987d97b6 in ssl_pphrase_Handle (s=0x59d3a8, p=0x5a72d8) at ssl_engine_pphrase.c:243 mc = (SSLModConfigRec *) 0x571738 sc = (SSLSrvConfigRec *) 0x668c38 pServ = (server_rec *) 0x65fa48 cpVHostID = 0x60add0 "apache1.whatever.com:443" szPath = "/apps/httpd2222/conf/certs/apache1.whatever.com.crt\000\177\000\000\000Ü×ÿ¿\177\000\000\000à×ÿ¿\177", '\0' <repeats 15 times>, "\001\000\000\000°åÿ¿\177\000\000\000;\000\000\000+\000\000\000\020Ûÿ¿\177", '\0' <repeats 35 times>, "à\224k", '\0' <repeats 13 times>, "øéÿ¿\177\000\000\000\020\000\000\000;\000\000\000\016\000\000\000\001\000\001\000\001", '\0' <repeats 15 times>, "n\000\000\000\000\004\000\000°åÿ¿\177", '\0' <repeats 11 times>, "\020Ûÿ¿\177\000\000\000+\000\000\000;", '\0' <repeats 35 times>... pPrivateKey = Variable "pPrivateKey" is not available. (gdb) Jim