Issue 18 in kedr: Instrumentation facilities do not work for kernel 3.16-rc2: RO/NX issue

[ke...@googlecode.com]

Status: Accepted
Owner: euspec...@gmail.com
Labels: Type-Defect Priority-Medium

New issue 18 by euspec...@gmail.com: Instrumentation facilities do not work
for kernel 3.16-rc2: RO/NX issue
http://code.google.com/p/kedr/issues/detail?id=18

Instrumentation facilities do not work for kernel 3.16-rc2 because the code
of a kernel module now becomes read-only earlier (if
CONFIG_DEBUG_SET_MODULE_RONX=y).

That is, earlier than the notifier is called and the instrumentation starts.

Here is the commit:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4982223e51e8ea9d09bb33c8323b5ec1877b2b51

We need to either do the instrumentation earlier (see how Ftrace got around
this) or remove RO before and restore it after instrumentation if needed.

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[ke...@googlecode.com]

Comment #1 on issue 18 by euspec...@gmail.com: Instrumentation facilities

do not work for kernel 3.16-rc2: RO/NX issue
http://code.google.com/p/kedr/issues/detail?id=18

Fixed in the repository.

[ke...@googlecode.com]

Comment #2 on issue 18 by tsy...@gmail.com: Instrumentation facilities do

not work for kernel 3.16-rc2: RO/NX issue

https://code.google.com/p/kedr/issues/detail?id=18

Can this be marked as "Fixed"?

[ke...@googlecode.com]

Comment #3 on issue 18 by euspec...@gmail.com: Instrumentation facilities

do not work for kernel 3.16-rc2: RO/NX issue
https://code.google.com/p/kedr/issues/detail?id=18

Will be marked as "fixed" when we release the version of KEDR containing
this fix. Until then, it will be kept open.