Egor, You're a treasure keeper, so many useful tips :) As you mentioned yourself, this info should be on the website, and I side with you on this. We actually have some debugging tips already: http://incubator.apache.org/harmony/subcomponents/drlvm/debugging_VM_and _JIT.html However, they don't mention the launcher and all those tiny little things you mentioned, like the format of paths, etc. the doc is also partially outdated (mentions ij).
Do you think we can use this doc as the basis for storing more content? Thank you, Nadya Morozova -----Original Message----- From: news [mailto:[EMAIL PROTECTED] On Behalf Of Egor Pasko Sent: Friday, October 20, 2006 1:34 PM To: harmony-dev@incubator.apache.org Subject: Re: [drlvm] How to debug the drlvm with gdb? On the 0x208 day of Apache Harmony Tonny Lau wrote: > Hi, > > I checked out the latest drlvm, and failed to set breakpoint when I used > gdb. It seems the > "harmony/enhanced/drlvm/trunk/build/lnx_ia32_gcc_debug/deploy/jre/bin/ja va" > is copied from "harmony/enhanced/classlib/trunk/deploy/jdk/jre/bin/java", > i.e., it is not a debug version. Does anyone know how to debug it? Thanks! Oh! should be on the site!! some day .. some day .. Yes, it's the launcher. It is taken from classlib (which is not built in debug mode even if DRLVM is built in debug (=default)). If you want to build the launcher in debug mode, change: working_classlib/depends/build/makefile.include (put -O0 -g instead of -O1) pretty, huh? :) to debug on linux you should export LD_LIBRARY_PATH for GDB: export LD_LIBRARY_PATH=$jre/bin:$jre/bin/default (you know what $jre is:) (news is that tere should be no slashess at the end of each path, and no soft links inside, surprize, surprize:) then you can run GDB and, at least, see threads created, etc.. DRLVM is quite distributed between shared libraries, so it is not easy to set breakpoints somewhere in libraries' code. There are 2 approaches: 1. drop asm("int3") in your code, rebuild and catch it via an ordinary run from within GDB 2. stop at position when nothing interesting happend, but all libraries are loaded (my favourite) for (2) I use 2 custom GDB scripts "hstart" and "hrun". "hstart" makes the first stop on my favourite start point. "hrun" uses those breakpoints to stop on the point with further runs in the GDB session. To get these two, drop these lines into your ~/.gdbinit: --------------------------------------- define hstart break main run break hysl_open_shared_library continue finish disable break compile_jit_a_method continue disable end define hrun en 1 run en 2 continue finish disable en 3 continue disable end --------------------------------------- good luck! ;) -- 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]
