r266654 - in /trunk/gcc: ChangeLog config/i386/...

[ak@gcc.gnu.org]

Author: ak
Date: Thu Nov 29 23:11:59 2018
New Revision: 266654

URL: https://gcc.gnu.org/viewcvs?rev=266654&root=gcc&view=rev
Log:
Allow changing the fentry section per file and per function

When dynamically patching in/out instrumentation it can be useful
to handle different classes of functions differently. Add support
for changing the fentry section name on the command line
or as a function attributes. This allows to mark functions differently,
and handle them differently in dynamic patching.

gcc/:

2018-11-29  Andi Kleen  <ak@linux.intel.com>

	* config/i386/i386.c (current_fentry_section): Add.
	(x86_function_profiler): Handle fentry section.
	(ix86_attribute_table): Add fentry section.
	* config/i386/i386.opt: Add -mfentry-section.
	* doc/extend.texi: Document fentry_section attribute.
	* doc/invoke.texi: Document -mfentry-section.

gcc/testsuite/:

2018-11-29  Andi Kleen  <ak@linux.intel.com>

	* gcc.target/i386/fentryname2.c: New test.
	* gcc.target/i386/fentryname3.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/fentryname2.c
    trunk/gcc/testsuite/gcc.target/i386/fentryname3.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c
    trunk/gcc/config/i386/i386.opt
    trunk/gcc/doc/extend.texi
    trunk/gcc/doc/invoke.texi
    trunk/gcc/testsuite/ChangeLog