linux/kernel/gcov/Kconfig
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   1menu "GCOV-based kernel profiling"
   2
   3config GCOV_KERNEL
   4        bool "Enable gcov-based kernel profiling"
   5        depends on DEBUG_FS
   6        select CONSTRUCTORS if !UML
   7        default n
   8        ---help---
   9        This option enables gcov-based code profiling (e.g. for code coverage
  10        measurements).
  11
  12        If unsure, say N.
  13
  14        Additionally specify CONFIG_GCOV_PROFILE_ALL=y to get profiling data
  15        for the entire kernel. To enable profiling for specific files or
  16        directories, add a line similar to the following to the respective
  17        Makefile:
  18
  19        For a single file (e.g. main.o):
  20                GCOV_PROFILE_main.o := y
  21
  22        For all files in one directory:
  23                GCOV_PROFILE := y
  24
  25        To exclude files from being profiled even when CONFIG_GCOV_PROFILE_ALL
  26        is specified, use:
  27
  28                GCOV_PROFILE_main.o := n
  29        and:
  30                GCOV_PROFILE := n
  31
  32        Note that the debugfs filesystem has to be mounted to access
  33        profiling data.
  34
  35config GCOV_PROFILE_ALL
  36        bool "Profile entire Kernel"
  37        depends on GCOV_KERNEL
  38        depends on SUPERH || S390 || X86 || (PPC && EXPERIMENTAL) || MICROBLAZE
  39        default n
  40        ---help---
  41        This options activates profiling for the entire kernel.
  42
  43        If unsure, say N.
  44
  45        Note that a kernel compiled with profiling flags will be significantly
  46        larger and run slower. Also be sure to exclude files from profiling
  47        which are not linked to the kernel image to prevent linker errors.
  48
  49endmenu
  50
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