[ltt-dev] [Qemu-devel] [PATCH 2/3] trace: [ust] Do not use 'm' in event argument names (used by ust macros)

[vilanova@ac.upc.edu (Lluís Vilanova)]

Stefan Hajnoczi writes:

> On Fri, Sep 16, 2011 at 06:59:38PM +0200, Llu?s Vilanova wrote:
>> Signed-off-by: Llu?s Vilanova <vilanova at ac.upc.edu>
>> ---
>> trace-events |    4 ++--
>> 1 files changed, 2 insertions(+), 2 deletions(-)
>> 
>> diff --git a/trace-events b/trace-events
>> index 9d1fbbb..b653d70 100644
>> --- a/trace-events
>> +++ b/trace-events
>> @@ -418,8 +418,8 @@ milkymist_pfpu_pulse_irq(void) "Pulse IRQ"
>> # hw/milkymist-softusb.c
>> milkymist_softusb_memory_read(uint32_t addr, uint32_t value) "addr %08x value %08x"
>> milkymist_softusb_memory_write(uint32_t addr, uint32_t value) "addr %08x value %08x"
>> -milkymist_softusb_mevt(uint8_t m) "m %d"
>> -milkymist_softusb_kevt(uint8_t m) "m %d"
>> +milkymist_softusb_mevt(uint8_t _m) "m %d"
>> +milkymist_softusb_kevt(uint8_t _m) "m %d"

> The LTTng community has been very responsive in addressing namespace
> issues with libust.  Let's post more details and see if it can be fixed
> in libust.

> Could you please post your gcc and libust versions?

> I have not been able to reproduce the problem on Debian libust-dev
> 0.15-3.  My gcc version is Debian gcc 4.6.1-4.

Yup, I was using libust-dev 0.5 (debian stable). After switching to 0.15 (debian
testing) other problems arise.

For example, in my box compiling osdep.c yields lots of "variable ?__tp_cb_data?
set but not used", but using a minimal example does not raise such problems, so
I'm assuming this is related to some namespace problems related to some other
code in qemu's headers.

Unfortunately, right now I have no time to debug the causes, so I'll just assume
the two patches I sent (this naming issue and the zero-length printf format) are
just no longer necessary with recent versions of libust.


Thanks,
    Lluis

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