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TOMOYO Linux Cross Reference
Linux/kernel/gcov/Kconfig

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Diff markup

Differences between /kernel/gcov/Kconfig (Version linux-6.11.5) and /kernel/gcov/Kconfig (Version linux-6.7.12)


  1 # SPDX-License-Identifier: GPL-2.0-only             1 # SPDX-License-Identifier: GPL-2.0-only
  2 menu "GCOV-based kernel profiling"                  2 menu "GCOV-based kernel profiling"
  3                                                     3 
  4 config GCOV_KERNEL                                  4 config GCOV_KERNEL
  5         bool "Enable gcov-based kernel profili      5         bool "Enable gcov-based kernel profiling"
  6         depends on DEBUG_FS                         6         depends on DEBUG_FS
  7         depends on !ARCH_WANTS_NO_INSTR || CC_      7         depends on !ARCH_WANTS_NO_INSTR || CC_HAS_NO_PROFILE_FN_ATTR
  8         select CONSTRUCTORS                         8         select CONSTRUCTORS
  9         default n                                   9         default n
 10         help                                       10         help
 11         This option enables gcov-based code pr     11         This option enables gcov-based code profiling (e.g. for code coverage
 12         measurements).                             12         measurements).
 13                                                    13 
 14         If unsure, say N.                          14         If unsure, say N.
 15                                                    15 
 16         Additionally specify CONFIG_GCOV_PROFI     16         Additionally specify CONFIG_GCOV_PROFILE_ALL=y to get profiling data
 17         for the entire kernel. To enable profi     17         for the entire kernel. To enable profiling for specific files or
 18         directories, add a line similar to the     18         directories, add a line similar to the following to the respective
 19         Makefile:                                  19         Makefile:
 20                                                    20 
 21         For a single file (e.g. main.o):           21         For a single file (e.g. main.o):
 22                 GCOV_PROFILE_main.o := y           22                 GCOV_PROFILE_main.o := y
 23                                                    23 
 24         For all files in one directory:            24         For all files in one directory:
 25                 GCOV_PROFILE := y                  25                 GCOV_PROFILE := y
 26                                                    26 
 27         To exclude files from being profiled e     27         To exclude files from being profiled even when CONFIG_GCOV_PROFILE_ALL
 28         is specified, use:                         28         is specified, use:
 29                                                    29 
 30                 GCOV_PROFILE_main.o := n           30                 GCOV_PROFILE_main.o := n
 31         and:                                       31         and:
 32                 GCOV_PROFILE := n                  32                 GCOV_PROFILE := n
 33                                                    33 
 34         Note that the debugfs filesystem has t     34         Note that the debugfs filesystem has to be mounted to access
 35         profiling data.                            35         profiling data.
 36                                                    36 
 37 config ARCH_HAS_GCOV_PROFILE_ALL                   37 config ARCH_HAS_GCOV_PROFILE_ALL
 38         def_bool n                                 38         def_bool n
 39                                                    39 
 40 config GCOV_PROFILE_ALL                            40 config GCOV_PROFILE_ALL
 41         bool "Profile entire Kernel"               41         bool "Profile entire Kernel"
 42         depends on !COMPILE_TEST                   42         depends on !COMPILE_TEST
 43         depends on GCOV_KERNEL                     43         depends on GCOV_KERNEL
 44         depends on ARCH_HAS_GCOV_PROFILE_ALL       44         depends on ARCH_HAS_GCOV_PROFILE_ALL
 45         default n                                  45         default n
 46         help                                       46         help
 47         This options activates profiling for t     47         This options activates profiling for the entire kernel.
 48                                                    48 
 49         If unsure, say N.                          49         If unsure, say N.
 50                                                    50 
 51         Note that a kernel compiled with profi     51         Note that a kernel compiled with profiling flags will be significantly
 52         larger and run slower. Also be sure to     52         larger and run slower. Also be sure to exclude files from profiling
 53         which are not linked to the kernel ima     53         which are not linked to the kernel image to prevent linker errors.
 54                                                    54 
 55 endmenu                                            55 endmenu
                                                      

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