WSL2-Linux-Kernel/scripts
Peter Oberparleiter 2521f2c228 gcov: add gcov profiling infrastructure
Enable the use of GCC's coverage testing tool gcov [1] with the Linux
kernel.  gcov may be useful for:

 * debugging (has this code been reached at all?)
 * test improvement (how do I change my test to cover these lines?)
 * minimizing kernel configurations (do I need this option if the
   associated code is never run?)

The profiling patch incorporates the following changes:

 * change kbuild to include profiling flags
 * provide functions needed by profiling code
 * present profiling data as files in debugfs

Note that on some architectures, enabling gcc's profiling option
"-fprofile-arcs" for the entire kernel may trigger compile/link/
run-time problems, some of which are caused by toolchain bugs and
others which require adjustment of architecture code.

For this reason profiling the entire kernel is initially restricted
to those architectures for which it is known to work without changes.
This restriction can be lifted once an architecture has been tested
and found compatible with gcc's profiling. Profiling of single files
or directories is still available on all platforms (see config help
text).

[1] http://gcc.gnu.org/onlinedocs/gcc/Gcov.html

Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Li Wei <W.Li@Sun.COM>
Cc: Michael Ellerman <michaele@au1.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Heiko Carstens <heicars2@linux.vnet.ibm.com>
Cc: Martin Schwidefsky <mschwid2@linux.vnet.ibm.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: WANG Cong <xiyou.wangcong@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:57 -07:00
..
basic kbuild: fix a compile warning 2009-06-14 22:36:23 +02:00
dtc Move dtc and libfdt sources from arch/powerpc/boot to scripts/dtc 2009-05-02 16:52:26 -07:00
genksyms Revert "kbuild: strip generated symbols from *.ko" 2009-01-14 21:38:20 +01:00
kconfig kconfig: do not hardcode "include/config/auto.conf" filename 2009-06-09 22:37:51 +02:00
ksymoops Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mod Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-next 2009-06-14 14:12:18 -07:00
package kbuild, deb-pkg: bump standards version 2009-06-09 22:37:42 +02:00
rt-tester [PATCH] rtmutex: Modify rtmutex-tester to test the setscheduler propagation 2006-06-27 17:32:47 -07:00
selinux SELinux: add gitignore file for mdp script 2008-09-05 21:43:38 +10:00
tracing debugfs: Fix terminology inconsistency of dir name to mount debugfs filesystem. 2009-06-15 21:30:28 -07:00
.gitignore Revert "fix modules_install via NFS" 2009-04-06 14:27:17 -07:00
Kbuild.include kbuild: use KECHO convenience echo 2008-12-03 21:32:01 +01:00
Lindent scripts/Lindent: support gnu indent v2.2.10 2008-04-29 08:06:04 -07:00
Makefile Move dtc and libfdt sources from arch/powerpc/boot to scripts/dtc 2009-05-02 16:52:26 -07:00
Makefile.build kbuild: introduce subdir-ccflags-y 2009-04-19 11:12:12 +02:00
Makefile.clean kbuild: fix some minor typoes 2008-04-25 20:18:48 +02:00
Makefile.fwinst firmware: silence __fw_modbuild and __fw_modinst 'Nothing to be done' messages 2008-08-02 07:52:29 +01:00
Makefile.headersinst kbuild: fix "Argument list too long" error for "make headers_check", 2009-06-09 22:37:56 +02:00
Makefile.host kbuild: fix some minor typoes 2008-04-25 20:18:48 +02:00
Makefile.lib gcov: add gcov profiling infrastructure 2009-06-18 13:03:57 -07:00
Makefile.modinst Revert "kbuild: strip generated symbols from *.ko" 2009-01-14 21:38:20 +01:00
Makefile.modpost kbuild: fix KBUILD_EXTRA_SYMBOLS 2008-10-29 22:02:09 +01:00
bin2c.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
binoffset.c update the email address of Randy Dunlap 2006-01-03 13:37:51 +01:00
bloat-o-meter fix bloat-o-meter for ppc64 2007-12-17 19:28:17 -08:00
bootgraph.pl bootgraph: fix for use with dot symbols 2009-02-15 12:50:08 +01:00
checkincludes.pl Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
checkkconfigsymbols.sh kbuild: script to check for undefined Kconfig symbols 2007-10-12 21:13:50 +02:00
checkpatch.pl checkpatch: version 0.28 2009-02-27 16:26:22 -08:00
checkstack.pl sparc: Add checkstack support 2008-10-22 21:53:49 -07:00
checksyscalls.sh asm-generic: add a generic unistd.h 2009-06-11 21:02:16 +02:00
checkversion.pl kbuild: introduce utsrelease.h 2006-07-03 23:30:54 +02:00
cleanfile scripts: Make cleanfile/cleanpatch warn about long lines 2007-07-16 21:15:50 +02:00
cleanpatch scripts: Make cleanfile/cleanpatch warn about long lines 2007-07-16 21:15:50 +02:00
config kbuild: add generic --set-str option to scripts/config 2009-06-14 22:48:08 +02:00
conmakehash.c [PATCH] kbuild: signed char fixes for scripts 2005-07-27 22:27:08 +02:00
decodecode scripts: improve the decodecode script 2008-12-03 22:36:39 +01:00
diffconfig kconfig: add diffconfig utility 2008-07-25 22:12:41 +02:00
export_report.pl kbuild: fix perl usage in export_report.pl 2007-10-12 21:13:50 +02:00
extract-ikconfig remove bashisms from scripts/extract-ikconfig 2008-12-03 21:32:02 +01:00
gcc-version.sh Remove bashisms from scripts 2009-06-09 22:37:54 +02:00
gcc-x86_32-has-stack-protector.sh stackprotector: fix multi-word cross-builds 2009-02-11 12:17:29 +01:00
gcc-x86_64-has-stack-protector.sh stackprotector: fix multi-word cross-builds 2009-02-11 12:17:29 +01:00
gen_initramfs_list.sh kbuild: fix spurious initramfs rebuild 2009-04-11 08:18:12 +02:00
get_maintainer.pl scripts/get_maintainer.pl: change "die" to "warn" when command line file is not a patch 2009-06-16 19:47:54 -07:00
gfp-translate mm: add a gfp-translate script to help understand page allocation failure reports 2009-06-16 19:47:44 -07:00
headerdep.pl kbuild: fix option processing for -I in headerdep 2009-04-11 08:18:07 +02:00
headers.sh kbuild: clean up scripts/headers.sh 2009-06-09 22:37:43 +02:00
headers_check.pl kbuild/headers_check: refine extern check 2009-06-09 22:37:56 +02:00
headers_install.pl kbuild: in headers_install autoconvert asm/inline/volatile to __xxx__ 2009-01-02 20:43:24 +01:00
kallsyms.c kallsyms: generalize text region handling 2009-06-14 22:43:46 +02:00
kernel-doc Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-next 2009-06-14 14:12:18 -07:00
makelst kbuild: introduce ccflags-y, asflags-y and ldflags-y 2007-10-15 22:25:06 +02:00
markup_oops.pl scripts: add x86 64 bit support to the markup_oops.pl script 2009-02-15 12:50:10 +01:00
mkcompile_h kbuild: kill output in silent mode of mkcompile_h 2008-12-03 21:32:00 +01:00
mkmakefile kbuild: teach mkmakfile to be silent 2008-12-03 21:32:02 +01:00
mksysmap Revert "kbuild: strip generated symbols from *.ko" 2009-01-14 21:38:20 +01:00
mkuboot.sh kbuild/mkuboot.sh: allow spaces in CROSS_COMPILE 2007-05-02 20:58:10 +02:00
mkversion Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
namespace.pl x86: fixup the x86 namespace change in scripts/namespace.pl 2007-10-11 17:56:02 +02:00
patch-kernel bugfix for scripts/patch-kernel in 2.6 sublevel stepping 2008-08-06 22:11:33 +02:00
pnmtologo.c fbdev: move logo externs to header file 2009-06-16 19:47:57 -07:00
profile2linkerlist.pl [PATCH] x86_64: Basic reorder infrastructure 2006-03-25 09:10:56 -08:00
recordmcount.pl sparc64: Add proper dynamic ftrace support. 2009-06-16 04:56:53 -07:00
setlocalversion kbuild: fix delay in setlocalversion on readonly source 2009-06-14 22:26:00 +02:00
show_delta kbuild: fix mode of checkstack.pl and other files. 2006-04-11 13:37:07 +02:00
tags.sh kbuild: remove a tag file before it is regenerated 2009-05-01 10:54:02 +02:00
unifdef.c kbuild: fix headers_exports with boolean expression 2009-06-09 22:37:57 +02:00
ver_linux Remove bashisms from scripts 2009-06-09 22:37:54 +02:00