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
kbuild: fix a compile warning
2009-06-14 22:36:23 +02:00
Move dtc and libfdt sources from arch/powerpc/boot to scripts/dtc
2009-05-02 16:52:26 -07:00
Revert "kbuild: strip generated symbols from *.ko"
2009-01-14 21:38:20 +01:00
kconfig: do not hardcode "include/config/auto.conf" filename
2009-06-09 22:37:51 +02:00
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-next
2009-06-14 14:12:18 -07:00
kbuild, deb-pkg: bump standards version
2009-06-09 22:37:42 +02:00
[PATCH] rtmutex: Modify rtmutex-tester to test the setscheduler propagation
2006-06-27 17:32:47 -07:00
SELinux: add gitignore file for mdp script
2008-09-05 21:43:38 +10:00
debugfs: Fix terminology inconsistency of dir name to mount debugfs filesystem.
2009-06-15 21:30:28 -07:00
Revert "fix modules_install via NFS"
2009-04-06 14:27:17 -07:00
fix bloat-o-meter for ppc64
2007-12-17 19:28:17 -08:00
bootgraph: fix for use with dot symbols
2009-02-15 12:50:08 +01:00
kbuild: script to check for undefined Kconfig symbols
2007-10-12 21:13:50 +02:00
checkpatch: version 0.28
2009-02-27 16:26:22 -08:00
sparc: Add checkstack support
2008-10-22 21:53:49 -07:00
asm-generic: add a generic unistd.h
2009-06-11 21:02:16 +02:00
kbuild: introduce utsrelease.h
2006-07-03 23:30:54 +02:00
scripts: Make cleanfile/cleanpatch warn about long lines
2007-07-16 21:15:50 +02:00
scripts: Make cleanfile/cleanpatch warn about long lines
2007-07-16 21:15:50 +02:00
kbuild: add generic --set-str option to scripts/config
2009-06-14 22:48:08 +02:00
scripts: improve the decodecode script
2008-12-03 22:36:39 +01:00
kconfig: add diffconfig utility
2008-07-25 22:12:41 +02:00
kbuild: fix perl usage in export_report.pl
2007-10-12 21:13:50 +02:00
remove bashisms from scripts/extract-ikconfig
2008-12-03 21:32:02 +01:00
Remove bashisms from scripts
2009-06-09 22:37:54 +02:00
stackprotector: fix multi-word cross-builds
2009-02-11 12:17:29 +01:00
stackprotector: fix multi-word cross-builds
2009-02-11 12:17:29 +01:00
kbuild: fix spurious initramfs rebuild
2009-04-11 08:18:12 +02:00
scripts/get_maintainer.pl: change "die" to "warn" when command line file is not a patch
2009-06-16 19:47:54 -07:00
mm: add a gfp-translate script to help understand page allocation failure reports
2009-06-16 19:47:44 -07:00
kbuild: fix option processing for -I in headerdep
2009-04-11 08:18:07 +02:00
kbuild: clean up scripts/headers.sh
2009-06-09 22:37:43 +02:00
kbuild/headers_check: refine extern check
2009-06-09 22:37:56 +02:00
kbuild: in headers_install autoconvert asm/inline/volatile to __xxx__
2009-01-02 20:43:24 +01:00
kallsyms: generalize text region handling
2009-06-14 22:43:46 +02:00
kbuild: use KECHO convenience echo
2008-12-03 21:32:01 +01:00
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-next
2009-06-14 14:12:18 -07:00
scripts/Lindent: support gnu indent v2.2.10
2008-04-29 08:06:04 -07:00
Move dtc and libfdt sources from arch/powerpc/boot to scripts/dtc
2009-05-02 16:52:26 -07:00
kbuild: introduce subdir-ccflags-y
2009-04-19 11:12:12 +02:00
kbuild: fix some minor typoes
2008-04-25 20:18:48 +02:00
firmware: silence __fw_modbuild and __fw_modinst 'Nothing to be done' messages
2008-08-02 07:52:29 +01:00
kbuild: fix "Argument list too long" error for "make headers_check",
2009-06-09 22:37:56 +02:00
kbuild: fix some minor typoes
2008-04-25 20:18:48 +02:00
gcov: add gcov profiling infrastructure
2009-06-18 13:03:57 -07:00
Revert "kbuild: strip generated symbols from *.ko"
2009-01-14 21:38:20 +01:00
kbuild: fix KBUILD_EXTRA_SYMBOLS
2008-10-29 22:02:09 +01:00
kbuild: introduce ccflags-y, asflags-y and ldflags-y
2007-10-15 22:25:06 +02:00
scripts: add x86 64 bit support to the markup_oops.pl script
2009-02-15 12:50:10 +01:00
kbuild: kill output in silent mode of mkcompile_h
2008-12-03 21:32:00 +01:00
kbuild: teach mkmakfile to be silent
2008-12-03 21:32:02 +01:00
Revert "kbuild: strip generated symbols from *.ko"
2009-01-14 21:38:20 +01:00
kbuild/mkuboot.sh: allow spaces in CROSS_COMPILE
2007-05-02 20:58:10 +02:00
x86: fixup the x86 namespace change in scripts/namespace.pl
2007-10-11 17:56:02 +02:00
bugfix for scripts/patch-kernel in 2.6 sublevel stepping
2008-08-06 22:11:33 +02:00
fbdev: move logo externs to header file
2009-06-16 19:47:57 -07:00
[PATCH] x86_64: Basic reorder infrastructure
2006-03-25 09:10:56 -08:00
sparc64: Add proper dynamic ftrace support.
2009-06-16 04:56:53 -07:00
kbuild: fix delay in setlocalversion on readonly source
2009-06-14 22:26:00 +02:00
kbuild: fix mode of checkstack.pl and other files.
2006-04-11 13:37:07 +02:00
kbuild: remove a tag file before it is regenerated
2009-05-01 10:54:02 +02:00
kbuild: fix headers_exports with boolean expression
2009-06-09 22:37:57 +02:00
Remove bashisms from scripts
2009-06-09 22:37:54 +02:00
2521f2c228