On the 0x1F0 day of Apache Harmony Armand Navabi wrote: > > What is the kernel version BTW? There could be some issues with > > 2.4.x, currently everybody works with 2.6.x > > The kernel version is 2.6.17.8. > > > concerning hythread_exit .. Did you resolve it already? I see the > > symbol _undefined_ too (and no definition of the symbol in hythread.so > > or any other lib, although sources are fine, probably some bug in the > > build system), but dynamic linker does not complain on my machine. > > No, I did not resolve this problem. When I try to run ./java by itself I > see the following: > > ./java: relocation error: > /homes/anavabi/Harmony/enhanced/drlvm/trunk/build/deploy/jre/bin/libhyprt.so > : symbol hythread_exit, version HYTHR_0.1 not defined in file libhythr.so > with link time reference > > And then it hangs. I did find that this would not happen (i.e. ./java would > run just fine) if I overwrite libhythr.so with the libhythr.so from the > classlib's /deploy/jdk/jre/bin directory. Is that a safe way to resolve > this problem? > > > hm, gdb .. did you 'export' LD_LIBRARY_PATH? > > (sorry for the dummy question:) > > No need apologize. I'm sure in the end it will be a dummy mistake that I'm > making. But yes, I did export the LD_LIBRARY_PATH. I had it first set to > the deploy/jre/bin directory. I also tried to set it to put > deploy/jre/bin/default also in the path. > > Let me be clear when I say I am unable to debug with gdb. First the problem > I am having is when I try to set a breakpoint I always see this: > > (gdb) b jni.cpp:478 > No source file named jni.cpp. > Make breakpoint pending on future shared library load? (y or [n]) y
I solve this by breaking inside launcher after VM lib is loaded, then I break somewhere after libjitrino.so is loaded. Then I can break anywhere :) looks like this: break main.c:360 r dis break compile_jit_a_method c dis break whatever function you want You can make it a script via GDB's 'define' and put somewhere in ~/.gdbinit, two scripts are better: first for initial run, the second script does the same but reusing old breakpoint numbers: dis en 1 r dis en 2 c dis I should put that into the FAQ, obviously. > > And then when I run the program it never stops at the breakpoint, though I > see the print I have inserted in the code. Secondly, and more importantly, > if I try to do anything interesting, like run helloworld, gdb seems to lose > a thread and then hang (says it Cannot find a thread. Invalid thread > handle). I have to then stop it and go kill it. this one is probably a separate issue (not connected with "future shared library load"). Try my above suggestion, please. > GNU gdb 6.4 > Copyright 2005 Free Software Foundation, Inc. > GDB is free software, covered by the GNU General Public License, and you are > welcome to change it and/or distribute copies of it under certain > conditions. > Type "show copying" to see the conditions. > There is absolutely no warranty for GDB. Type "show warranty" for details. > This GDB was configured as "i686-pc-linux-gnu"...Using host libthread_db > library "/lib/libthread_db.so.1". > > (gdb) r helloworld > Starting program: > /u/u12/anavabi/Harmony/enhanced/drlvm/trunk/build/deploy/jre/bin/java > helloworld > [Thread debugging using libthread_db enabled] > [New Thread 16384 (LWP 11007)] > [New Thread 32769 (LWP 11010)] > [New Thread 16386 (LWP 11011)] > Cannot find thread 32769: invalid thread handle > (gdb) q > The program is running. Exit anyway? (y or n) y > > [1]+ Stopped gdb ./java > > > Thanks, > Armand > > > On the 0x1F0 day of Apache Harmony Armand Navabi wrote: > > > When I try to run ./java helloworld, it just hangs and I have to kill > > > the process. I investigated this a little bit, and I found that it > > > hangs on the call to FindClass (in main.c line around line 1199). > > > I am > > > unable debug with gdb also, so I have resorted to printf's, and in > > > jni.cpp, I found the definition of FindClass, and put an printf to see > > > what class it is trying to find when it hangs. I see the following: > > > > > > Line 478 in jni.cpp: inside JNICALL FindClass: java/lang/Thread > > > > > > Also, when I run ./java -Xtrace:em, I get the following (and it > > > hangs): > > > ... > > > EM: compile start:[JET_DPGO n=802] java/lang/Thread::join()V > > > EM: compile done:[JET_DPGO n=802: OK] java/lang/Thread::join()V > > > EM: compile start:[JET_DPGO n=803] java/lang/Object::wait()V > > > EM: compile done:[JET_DPGO n=803: OK] java/lang/Object::wait()V > > > Line 478 in jni.cpp: inside JNICALL FindClass: java/lang/Thread > > > > > > Again, it seems to always hang after FindClass is called for > > > java/lang/Thread. > > > > > > I have tried setting LD_LIBRARY_PATH as suggested earlier. I also > > > have > > > JAVA_HOME set (and I have tried it with it unset). Everything > > > seems to > > > have the same behavior. > > > [EMAIL PROTECTED] ~/Harmony/enhanced/drlvm/trunk/build/deploy/jre/bin $ > > > echo > > > $LD_LIBRARY_PATH > > > /homes/anavabi/Harmony/enhanced/drlvm/trunk/build/deploy/jre/bin/:/ > > > homes/anavabi/Harmony/enhanced/drlvm/trunk/build/deploy/jre/bin/ > > > default > > > [EMAIL PROTECTED] ~/Harmony/enhanced/drlvm/trunk/build/deploy/jre/bin $ > > > echo > > > $JAVA_HOME > > > /homes/anavabi/Harmony/enhanced/drlvm/trunk/build/deploy/jre > > > > > > I am using Gentoo Linux. Any ideas? > > > > > Thanks, > > > Armand > > > > > > Gregory Shimansky wrote: > > >> On Friday 22 September 2006 14:31 Egor Pasko wrote: > > >> > > >>> what makes me really nervous is that I cannot debug in GDB on Linux > > >>> (!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) > > >>> > > >>> When GDB starts, it becomes broken right after the start: > > >>> [New Thread 1080397952 (LWP 13879)] > > >>> [New Thread 1083603888 (LWP 13882)] > > >>> Cannot find user-level thread for LWP 13879: generic error > > >>> > > >>> Did anybody come across this problem recently? I googled a > > >>> little, but > > >>> could not find any valuable comments. I remember, there was no such > > >>> problem in older days!! Is that our new ThreadManager that does > > >>> things > > >>> like this? or is it something else? > > >>> > > >> > > >> I've seen in another thread. The problem with gdb is caused > > >> because process > > >> reexecs itself with new environment (there is no other way known > > >> to tell > > >> dynamic linker to use a library path). This is new launcher > > >> feature necessary > > >> to get rid of java shell script and use a real executable. > > >> > > >> Ivan Volosyuk investigated the conditions when launcher performs > > >> execing > > >> itself to set LD_LIBRARY_PATH and it appears (unless fixed > > >> recently) that you > > >> need to set LD_LIBRARY_PATH=<HDK path>/bin/:<HDK path>/bin/ > > >> default. Don't > > >> forget a tailing slash in the first path :) > > >> > > >> Anyway, to get the correct LD_LIBRARY_PATH which launcher wants > > >> you can get it > > >> from /proc/`pidof java`/environ if you launch a simple java > > >> program and catch > > >> its reexeced environment. If LD_LIBRARY_PATH contents is equal to > > >> what > > >> launcher wants, reexecing doesn't happen and this allows normal > > >> debugging. > > >> > > >> I think we should document this since it is going to stay for a > > >> long time and > > >> is really required for development on Linux. > > >> > > >> > > > > > > > > > --------------------------------------------------------------------- > > > Terms of use : http://incubator.apache.org/harmony/mailing.html > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > > --------------------------------------------------------------------- > > Terms of use : http://incubator.apache.org/harmony/mailing.html > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > --------------------------------------------------------------------- > > Terms of use : http://incubator.apache.org/harmony/mailing.html > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > -- > Egor Pasko, Intel Managed Runtime Division > > > --------------------------------------------------------------------- > Terms of use : http://incubator.apache.org/harmony/mailing.html > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > > --------------------------------------------------------------------- > Terms of use : http://incubator.apache.org/harmony/mailing.html > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > -- Egor Pasko, Intel Managed Runtime Division --------------------------------------------------------------------- Terms of use : http://incubator.apache.org/harmony/mailing.html To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
