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f601de2044
Following up the arm testing of gcov, turns out gcov on ARM64 works fine as well. Only change needed is adding ARM64 to Kconfig depends. Tested with qemu and mach-virt Signed-off-by: Riku Voipio <riku.voipio@linaro.org> Acked-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
80 lines
2.0 KiB
Plaintext
80 lines
2.0 KiB
Plaintext
menu "GCOV-based kernel profiling"
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config GCOV_KERNEL
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bool "Enable gcov-based kernel profiling"
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depends on DEBUG_FS
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select CONSTRUCTORS if !UML
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default n
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---help---
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This option enables gcov-based code profiling (e.g. for code coverage
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measurements).
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If unsure, say N.
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Additionally specify CONFIG_GCOV_PROFILE_ALL=y to get profiling data
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for the entire kernel. To enable profiling for specific files or
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directories, add a line similar to the following to the respective
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Makefile:
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For a single file (e.g. main.o):
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GCOV_PROFILE_main.o := y
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For all files in one directory:
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GCOV_PROFILE := y
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To exclude files from being profiled even when CONFIG_GCOV_PROFILE_ALL
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is specified, use:
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GCOV_PROFILE_main.o := n
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and:
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GCOV_PROFILE := n
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Note that the debugfs filesystem has to be mounted to access
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profiling data.
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config GCOV_PROFILE_ALL
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bool "Profile entire Kernel"
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depends on GCOV_KERNEL
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depends on SUPERH || S390 || X86 || PPC || MICROBLAZE || ARM || ARM64
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default n
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---help---
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This options activates profiling for the entire kernel.
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If unsure, say N.
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Note that a kernel compiled with profiling flags will be significantly
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larger and run slower. Also be sure to exclude files from profiling
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which are not linked to the kernel image to prevent linker errors.
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choice
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prompt "Specify GCOV format"
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depends on GCOV_KERNEL
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default GCOV_FORMAT_AUTODETECT
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---help---
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The gcov format is usually determined by the GCC version, but there are
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exceptions where format changes are integrated in lower-version GCCs.
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In such a case use this option to adjust the format used in the kernel
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accordingly.
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If unsure, choose "Autodetect".
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config GCOV_FORMAT_AUTODETECT
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bool "Autodetect"
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---help---
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Select this option to use the format that corresponds to your GCC
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version.
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config GCOV_FORMAT_3_4
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bool "GCC 3.4 format"
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---help---
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Select this option to use the format defined by GCC 3.4.
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config GCOV_FORMAT_4_7
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bool "GCC 4.7 format"
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---help---
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Select this option to use the format defined by GCC 4.7.
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endchoice
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endmenu
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