Hi, I did not try to look into httpd as you require but here are some pointers.
Quoting Mehran Khan <i...@mehrankhan.com>: ---------------- SNIP ------------------ > > 3. Then, I put the *smallestTracePoint.h* and *smallestTracePoint.c* in > *httpd-2.4.7/server* directory, > included *smallestTracePoint.h *in the *main.c *file and added trace > points in the int *main(int argc, const char * const argv[])* and > **init_process(int > *argc, const char * const * *argv)* functions. Did you do a #define TRACEPOINT_DEFINE in main.c and also include your smallestTracePoint.h? > 4. Then I added *-finstrument-functions* in the *configure* file (Line > number 2830) in the extracted *httpd-2.4.7* directory, full line below > ac_compile='$CC -c $CFLAGS -finstrument-functions $CPPFLAGS > conftest.$ac_ext >&5' I do not know why -finstrument-functions is required here. Its independent of lttng tracepoints afaik. > 5. Then, from the /httpd-2.4.7 directory, I ran the following command to > configure the installation, it completed without any error. > ./configure --libdir=/usr/lib/usr/lib/liblttng-ust.so > --with-included-apr Why not export LDFLAGS='-llttng-ust' before configure or maybe add it in the Makefile/Makefile.in whatever httpd uses. > 6. When I ran the command 'make', I get the following error after a while > ... > make[1]: Entering directory `/root/httpd-2.4.7' > /root/httpd-2.4.7/srclib/apr/libtool --silent --mode=compile gcc ---------------- SNIP ------------------ > /root/httpd-2.4.7/srclib/apr/libtool --silent --mode=link gcc -std=gnu99 > -g -O2 -pthread -o httpd modules.lo buildmark.o -export-dynamic > server/libmain.la modules/core/libmod_so.la > modules/http/libmod_http.laserver/mpm/event/ > libevent.la os/unix/libos.la -L/usr/lib/x86_64-linux-gnu -lpcre > /root/httpd-2.4.7/srclib/apr-util/libaprutil-1.la/root/httpd-2.4.7/srclib/apr-util/xml/expat/ > libexpat.la /root/httpd-2.4.7/srclib/apr/libapr-1.la -luuid -lrt -lcrypt > -lpthread -ldl I can't see -llttng-ust in the build command. > I have tried including the *smallestTracePoint.c* file in the local > makefile (*/root/httpd-2.4.7/MakeFile)*... didn't do me any good. > Any idea what I am doing wrong ? You definitely need to include this in the build but I don't think an auto generated Makefile is a good place. For your convenience, I instrumented thttpd here [1]. Its a tiny and fast web server. There is 1 tracepoint in handle_newconnect() Have a look at Makefile.in, thttpd_tp.c and thttpd_tp_provider.h If you want generated traces, do let me know. [1] http://suchakra.fedorapeople.org/lttng/thttpd-instrumented.tar.gz -- Suchakra _______________________________________________ lttng-dev mailing list lttng-dev@lists.lttng.org http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
