17c568d60a
Compile the correct gcov implementation file for the specific gcc version. Signed-off-by: Frantisek Hrbata <fhrbata@redhat.com> Cc: Jan Stancek <jstancek@redhat.com> Cc: Kees Cook <keescook@chromium.org> Acked-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Andy Gospodarek <agospoda@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2.0 KiB
menu "GCOV-based kernel profiling"
config GCOV_KERNEL bool "Enable gcov-based kernel profiling" depends on DEBUG_FS select CONSTRUCTORS if !UML default n ---help--- This option enables gcov-based code profiling (e.g. for code coverage measurements).
If unsure, say N.
Additionally specify CONFIG_GCOV_PROFILE_ALL=y to get profiling data
for the entire kernel. To enable profiling for specific files or
directories, add a line similar to the following to the respective
Makefile:
For a single file (e.g. main.o):
GCOV_PROFILE_main.o := y
For all files in one directory:
GCOV_PROFILE := y
To exclude files from being profiled even when CONFIG_GCOV_PROFILE_ALL
is specified, use:
GCOV_PROFILE_main.o := n
and:
GCOV_PROFILE := n
Note that the debugfs filesystem has to be mounted to access
profiling data.
config GCOV_PROFILE_ALL bool "Profile entire Kernel" depends on GCOV_KERNEL depends on SUPERH || S390 || X86 || PPC || MICROBLAZE default n ---help--- This options activates profiling for the entire kernel.
If unsure, say N.
Note that a kernel compiled with profiling flags will be significantly
larger and run slower. Also be sure to exclude files from profiling
which are not linked to the kernel image to prevent linker errors.
choice prompt "Specify GCOV format" depends on GCOV_KERNEL default GCOV_FORMAT_AUTODETECT ---help--- The gcov format is usually determined by the GCC version, but there are exceptions where format changes are integrated in lower-version GCCs. In such a case use this option to adjust the format used in the kernel accordingly.
If unsure, choose "Autodetect".
config GCOV_FORMAT_AUTODETECT bool "Autodetect" ---help--- Select this option to use the format that corresponds to your GCC version.
config GCOV_FORMAT_3_4 bool "GCC 3.4 format" ---help--- Select this option to use the format defined by GCC 3.4.
config GCOV_FORMAT_4_7 bool "GCC 4.7 format" ---help--- Select this option to use the format defined by GCC 4.7.
endchoice
endmenu