On Tue, Sep 20, 2011 at 5:57 PM, Stefan Hajnoczi <stefa...@linux.vnet.ibm.com> wrote: > On Tue, Sep 20, 2011 at 05:05:45PM +0800, hkran wrote: >> On 09/09/2011 05:37 PM, Stefan Hajnoczi wrote: >> >The 'simple' trace backend uses pthreads and does not work on Windows. >> >These >> >patches switch from pthreads to glib so that the code builds on all >> >platforms >> >supported by glib. >> > >> >Only one thing I'm unhappy about: the simpletrace write-out thread used to >> >block all signals. I have removed that code and don't expect glib to do it >> >for >> >me. I'm not sure if there is a problem if signal handlers are invoked in >> >the >> >write-out thread instead of a QEMU thread. Any thoughts? >> > >> >Stefan Hajnoczi (2): >> > trace: portable simple trace backend using glib >> > trace: use binary file open mode in simpletrace >> > >> > trace/simple.c | 58 >> > ++++++++++++++++++++++++++----------------------------- >> > 1 files changed, 27 insertions(+), 31 deletions(-) >> > >> Stefan, >> >> I applied the patch and make &install it. >> >> After a round of running of the qemu with the patch, a trace file is >> here, but when I want to open it like this, >> ./simpletrace.py trace-events trace-29948 //trace-29948 is my tracefile >> an error occurs: >> >> Traceback (most recent call last): >> File "./simpletrace.py", line 151, in <module> >> run(Formatter()) >> File "./simpletrace.py", line 131, in run >> events = parse_events(open(sys.argv[1], 'r')) >> IOError: [Errno 2] No such file or directory: 'trace-events' >> >> Am I using it in a right way? > > Looks like your current working directory is scripts/ so simpletrace.py > will be unable to find the trace-events file which is in the parent > directory. > > Usually I stay in QEMU's root directory and just run: > $ qemu # ...generate the trace > $ scripts/simpletrace.py trace-events trace-$PID I know how to define my own event and play with it now. Very helpful for me to debug my functions. thanks.
> >> Additionally, There is something about WIN32 in patch, How can I >> compile a qemu running on windows? Could you give a reference? > > Search for 'mingw' in qemu-doc.texi for instructions. > > Stefan > > -- Regards, Zhi Yong Wu
