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same kernel working with 1 userspace filesystem and not with another one (Android IceCreamSandwich and JellyBean)
- From: "Turgis, Frederic" <f-turgis at ti dot com>
- To: "systemtap at sourceware dot org" <systemtap at sourceware dot org>
- Date: Fri, 5 Oct 2012 23:03:58 +0000
- Subject: same kernel working with 1 userspace filesystem and not with another one (Android IceCreamSandwich and JellyBean)
Hi,
We are starting an investigation but maybe someone would have an idea.
- kernels (K3.0 and K3.4) have an issue with Android JellyBean OS
* probing tracepoints works well (we monitor IRQs)
* probing functions does not work, it seems that nothing happens in that case (we just do a print, we only get tracepoints prints)
* at test start, we get now "WARNING: build-id address 0 < base 0"
- same kernel with Android ICS OS works OK. Same kernel exactly so same build of script
- staprun/stapio are statically linked so would have in theory no link with userspace. So the difference between the 2 OSes would be insmod but not sure that makes sense. I guess we should try ICS insmod in JB.
Any clue ? How can userspace influence systemtap if tool is statically built ?
Regards
Fred
OMAP Platform Business Unit - System Platform Engineering - Platform & Product Entitlement
Texas Instruments France SA, 821 Avenue Jack Kilby, 06270 Villeneuve Loubet. 036 420 040 R.C.S Antibes. Capital de EUR 12.654.784