SA.NEXT - SA feedback needed
volker.simonis at gmail.com
Mon Feb 10 02:10:00 PST 2014
I've created "8034065: GCC 4.3 and later doesn't export vtable symbols
any more which seem to be needed by SA"
(https://bugs.openjdk.java.net/browse/JDK-8034065) and assigned it to
Thank you and best regards,
On Mon, Feb 10, 2014 at 10:52 AM, Dmitry Samersoff
<dmitry.samersoff at oracle.com> wrote:
> For brief look SA doesn't need vtable symbols.
> But It's better to re-check it.
> Could you file a bug and assign it to me?
> On 2014-02-10 13:47, Volker Simonis wrote:
>> maybe slightly off-topic, but I want to ask if the SA agent needs the
>> vtable symbols of all HS classes which are exported by partially
>> generated mapfiles (make/linux/makefiles/build_vm_def.sh) during the
>> linking of the VM.
>> I recently found out (see this thread:
>> that compiling the HS with gcc 4.3 and later deasn't export this
>> symbols any more, even if they are listed in the map file.
>> So the simple question is - does the SA agent relies on the vtable
>> symbols beeing exported or not? If yes, we should think about a fix.
>> If not, we should remove the magic which generates the vtable symbols
>> in the map files (i.e. build_vm_def.sh) from the build.
>> PS: I didn't use SA agent until now although I think it is an
>> intersecting tool. I mostly use the internal tools from
>> utilities/debug.cpp. Another possibility used by some colleagues is to
>> use the Python scripting capabilities offered by GDB to achieve a
>> similar functionality. The downside of that approach is of course that
>> is is platform-dependent (i.e. gdb-only).
>> On Fri, Jan 31, 2014 at 3:19 PM, Dmitry Samersoff
>> <dmitry.samersoff at oracle.com> wrote:
>>> Hi Everyone,
>>> I would like to start a discussion about future of hotspot debugger,
>>> known as serviceability agent or SA.
>>> How you typically use it? What do you expect from it? What is missed?
>>> Please, share your stories and wishes.
>>> And please, fill the small quiz:
>>> 1. How often do you use SA?
>>> 2. On what platform do you use SA?
>>> 3. Do you use it to analyze life processes or coredumps?
>>> 5. What other debuggers do you use to debug hotspot issues
>>> Dmitry Samersoff
>>> Oracle Java development team, Saint Petersburg, Russia
>>> * I would love to change the world, but they won't give me the sources.
> Dmitry Samersoff
> Oracle Java development team, Saint Petersburg, Russia
> * I would love to change the world, but they won't give me the sources.
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