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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-5.0.21)


  1 # SPDX-License-Identifier: GPL-2.0-only        << 
  2 menu "GCOV-based kernel profiling"                  1 menu "GCOV-based kernel profiling"
  3                                                     2 
  4 config GCOV_KERNEL                                  3 config GCOV_KERNEL
  5         bool "Enable gcov-based kernel profili      4         bool "Enable gcov-based kernel profiling"
  6         depends on DEBUG_FS                         5         depends on DEBUG_FS
  7         depends on !ARCH_WANTS_NO_INSTR || CC_ !!   6         select CONSTRUCTORS if !UML
  8         select CONSTRUCTORS                    << 
  9         default n                                   7         default n
 10         help                                   !!   8         ---help---
 11         This option enables gcov-based code pr      9         This option enables gcov-based code profiling (e.g. for code coverage
 12         measurements).                             10         measurements).
 13                                                    11 
 14         If unsure, say N.                          12         If unsure, say N.
 15                                                    13 
 16         Additionally specify CONFIG_GCOV_PROFI     14         Additionally specify CONFIG_GCOV_PROFILE_ALL=y to get profiling data
 17         for the entire kernel. To enable profi     15         for the entire kernel. To enable profiling for specific files or
 18         directories, add a line similar to the     16         directories, add a line similar to the following to the respective
 19         Makefile:                                  17         Makefile:
 20                                                    18 
 21         For a single file (e.g. main.o):           19         For a single file (e.g. main.o):
 22                 GCOV_PROFILE_main.o := y           20                 GCOV_PROFILE_main.o := y
 23                                                    21 
 24         For all files in one directory:            22         For all files in one directory:
 25                 GCOV_PROFILE := y                  23                 GCOV_PROFILE := y
 26                                                    24 
 27         To exclude files from being profiled e     25         To exclude files from being profiled even when CONFIG_GCOV_PROFILE_ALL
 28         is specified, use:                         26         is specified, use:
 29                                                    27 
 30                 GCOV_PROFILE_main.o := n           28                 GCOV_PROFILE_main.o := n
 31         and:                                       29         and:
 32                 GCOV_PROFILE := n                  30                 GCOV_PROFILE := n
 33                                                    31 
 34         Note that the debugfs filesystem has t     32         Note that the debugfs filesystem has to be mounted to access
 35         profiling data.                            33         profiling data.
 36                                                    34 
 37 config ARCH_HAS_GCOV_PROFILE_ALL                   35 config ARCH_HAS_GCOV_PROFILE_ALL
 38         def_bool n                                 36         def_bool n
 39                                                    37 
 40 config GCOV_PROFILE_ALL                            38 config GCOV_PROFILE_ALL
 41         bool "Profile entire Kernel"               39         bool "Profile entire Kernel"
 42         depends on !COMPILE_TEST                   40         depends on !COMPILE_TEST
 43         depends on GCOV_KERNEL                     41         depends on GCOV_KERNEL
 44         depends on ARCH_HAS_GCOV_PROFILE_ALL       42         depends on ARCH_HAS_GCOV_PROFILE_ALL
 45         default n                                  43         default n
 46         help                                   !!  44         ---help---
 47         This options activates profiling for t     45         This options activates profiling for the entire kernel.
 48                                                    46 
 49         If unsure, say N.                          47         If unsure, say N.
 50                                                    48 
 51         Note that a kernel compiled with profi     49         Note that a kernel compiled with profiling flags will be significantly
 52         larger and run slower. Also be sure to     50         larger and run slower. Also be sure to exclude files from profiling
 53         which are not linked to the kernel ima     51         which are not linked to the kernel image to prevent linker errors.
                                                   >>  52 
                                                   >>  53 choice
                                                   >>  54         prompt "Specify GCOV format"
                                                   >>  55         depends on GCOV_KERNEL
                                                   >>  56         ---help---
                                                   >>  57         The gcov format is usually determined by the GCC version, and the
                                                   >>  58         default is chosen according to your GCC version. However, there are
                                                   >>  59         exceptions where format changes are integrated in lower-version GCCs.
                                                   >>  60         In such a case, change this option to adjust the format used in the
                                                   >>  61         kernel accordingly.
                                                   >>  62 
                                                   >>  63 config GCOV_FORMAT_3_4
                                                   >>  64         bool "GCC 3.4 format"
                                                   >>  65         depends on CC_IS_GCC && GCC_VERSION < 40700
                                                   >>  66         ---help---
                                                   >>  67         Select this option to use the format defined by GCC 3.4.
                                                   >>  68 
                                                   >>  69 config GCOV_FORMAT_4_7
                                                   >>  70         bool "GCC 4.7 format"
                                                   >>  71         ---help---
                                                   >>  72         Select this option to use the format defined by GCC 4.7.
                                                   >>  73 
                                                   >>  74 endchoice
 54                                                    75 
 55 endmenu                                            76 endmenu
                                                      

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