kernel-hacking: move kernel testing and coverage options to same submenu
Move error injection, coverage, testing options to a new top level submenu 'Kernel Testing and Coverage'. They are all for test purpose. Link: http://lkml.kernel.org/r/20190909144453.3520-5-changbin.du@gmail.com Signed-off-by: Changbin Du <changbin.du@gmail.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> Tested-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Changbin Du
Linus Torvalds
parent
3be5cbcde9
commit
09a7495258
@ -764,53 +764,6 @@ source "lib/Kconfig.kasan"
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endmenu # "Memory Debugging"
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config ARCH_HAS_KCOV
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bool
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help
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An architecture should select this when it can successfully
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build and run with CONFIG_KCOV. This typically requires
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disabling instrumentation for some early boot code.
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config CC_HAS_SANCOV_TRACE_PC
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def_bool $(cc-option,-fsanitize-coverage=trace-pc)
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config KCOV
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bool "Code coverage for fuzzing"
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depends on ARCH_HAS_KCOV
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depends on CC_HAS_SANCOV_TRACE_PC || GCC_PLUGINS
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select DEBUG_FS
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select GCC_PLUGIN_SANCOV if !CC_HAS_SANCOV_TRACE_PC
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help
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KCOV exposes kernel code coverage information in a form suitable
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for coverage-guided fuzzing (randomized testing).
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If RANDOMIZE_BASE is enabled, PC values will not be stable across
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different machines and across reboots. If you need stable PC values,
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disable RANDOMIZE_BASE.
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For more details, see Documentation/dev-tools/kcov.rst.
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config KCOV_ENABLE_COMPARISONS
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bool "Enable comparison operands collection by KCOV"
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depends on KCOV
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depends on $(cc-option,-fsanitize-coverage=trace-cmp)
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help
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KCOV also exposes operands of every comparison in the instrumented
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code along with operand sizes and PCs of the comparison instructions.
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These operands can be used by fuzzing engines to improve the quality
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of fuzzing coverage.
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config KCOV_INSTRUMENT_ALL
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bool "Instrument all code by default"
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depends on KCOV
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default y
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help
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If you are doing generic system call fuzzing (like e.g. syzkaller),
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then you will want to instrument the whole kernel and you should
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say y here. If you are doing more targeted fuzzing (like e.g.
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filesystem fuzzing with AFL) then you will want to enable coverage
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for more specific subsets of files, and should say n here.
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config DEBUG_SHIRQ
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bool "Debug shared IRQ handlers"
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depends on DEBUG_KERNEL
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@ -1480,6 +1433,54 @@ config CPU_HOTPLUG_STATE_CONTROL
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Say N if your are unsure.
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config LATENCYTOP
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bool "Latency measuring infrastructure"
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depends on DEBUG_KERNEL
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depends on STACKTRACE_SUPPORT
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depends on PROC_FS
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select FRAME_POINTER if !MIPS && !PPC && !S390 && !MICROBLAZE && !ARM && !ARC && !X86
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select KALLSYMS
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select KALLSYMS_ALL
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select STACKTRACE
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select SCHEDSTATS
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select SCHED_DEBUG
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help
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Enable this option if you want to use the LatencyTOP tool
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to find out which userspace is blocking on what kernel operations.
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source "kernel/trace/Kconfig"
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config PROVIDE_OHCI1394_DMA_INIT
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bool "Remote debugging over FireWire early on boot"
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depends on PCI && X86
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help
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If you want to debug problems which hang or crash the kernel early
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on boot and the crashing machine has a FireWire port, you can use
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this feature to remotely access the memory of the crashed machine
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over FireWire. This employs remote DMA as part of the OHCI1394
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specification which is now the standard for FireWire controllers.
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With remote DMA, you can monitor the printk buffer remotely using
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firescope and access all memory below 4GB using fireproxy from gdb.
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Even controlling a kernel debugger is possible using remote DMA.
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Usage:
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If ohci1394_dma=early is used as boot parameter, it will initialize
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all OHCI1394 controllers which are found in the PCI config space.
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As all changes to the FireWire bus such as enabling and disabling
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devices cause a bus reset and thereby disable remote DMA for all
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devices, be sure to have the cable plugged and FireWire enabled on
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the debugging host before booting the debug target for debugging.
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This code (~1k) is freed after boot. By then, the firewire stack
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in charge of the OHCI-1394 controllers should be used instead.
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See Documentation/debugging-via-ohci1394.txt for more information.
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source "lib/kunit/Kconfig"
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config NOTIFIER_ERROR_INJECTION
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tristate "Notifier error injection"
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depends on DEBUG_KERNEL
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@ -1638,53 +1639,57 @@ config FAULT_INJECTION_STACKTRACE_FILTER
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help
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Provide stacktrace filter for fault-injection capabilities
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config LATENCYTOP
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bool "Latency measuring infrastructure"
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depends on DEBUG_KERNEL
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depends on STACKTRACE_SUPPORT
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depends on PROC_FS
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select FRAME_POINTER if !MIPS && !PPC && !S390 && !MICROBLAZE && !ARM && !ARC && !X86
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select KALLSYMS
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select KALLSYMS_ALL
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select STACKTRACE
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select SCHEDSTATS
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select SCHED_DEBUG
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endmenu # "Kernel Testing and Coverage"
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menu "Kernel Testing and Coverage"
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config ARCH_HAS_KCOV
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bool
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help
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Enable this option if you want to use the LatencyTOP tool
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to find out which userspace is blocking on what kernel operations.
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An architecture should select this when it can successfully
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build and run with CONFIG_KCOV. This typically requires
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disabling instrumentation for some early boot code.
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source "kernel/trace/Kconfig"
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config CC_HAS_SANCOV_TRACE_PC
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def_bool $(cc-option,-fsanitize-coverage=trace-pc)
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config PROVIDE_OHCI1394_DMA_INIT
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bool "Remote debugging over FireWire early on boot"
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depends on PCI && X86
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config KCOV
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bool "Code coverage for fuzzing"
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depends on ARCH_HAS_KCOV
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depends on CC_HAS_SANCOV_TRACE_PC || GCC_PLUGINS
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select DEBUG_FS
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select GCC_PLUGIN_SANCOV if !CC_HAS_SANCOV_TRACE_PC
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help
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If you want to debug problems which hang or crash the kernel early
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on boot and the crashing machine has a FireWire port, you can use
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this feature to remotely access the memory of the crashed machine
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over FireWire. This employs remote DMA as part of the OHCI1394
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specification which is now the standard for FireWire controllers.
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KCOV exposes kernel code coverage information in a form suitable
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for coverage-guided fuzzing (randomized testing).
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With remote DMA, you can monitor the printk buffer remotely using
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firescope and access all memory below 4GB using fireproxy from gdb.
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Even controlling a kernel debugger is possible using remote DMA.
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If RANDOMIZE_BASE is enabled, PC values will not be stable across
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different machines and across reboots. If you need stable PC values,
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disable RANDOMIZE_BASE.
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Usage:
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For more details, see Documentation/dev-tools/kcov.rst.
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If ohci1394_dma=early is used as boot parameter, it will initialize
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all OHCI1394 controllers which are found in the PCI config space.
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config KCOV_ENABLE_COMPARISONS
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bool "Enable comparison operands collection by KCOV"
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depends on KCOV
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depends on $(cc-option,-fsanitize-coverage=trace-cmp)
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help
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KCOV also exposes operands of every comparison in the instrumented
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code along with operand sizes and PCs of the comparison instructions.
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These operands can be used by fuzzing engines to improve the quality
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of fuzzing coverage.
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As all changes to the FireWire bus such as enabling and disabling
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devices cause a bus reset and thereby disable remote DMA for all
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devices, be sure to have the cable plugged and FireWire enabled on
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the debugging host before booting the debug target for debugging.
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This code (~1k) is freed after boot. By then, the firewire stack
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in charge of the OHCI-1394 controllers should be used instead.
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See Documentation/debugging-via-ohci1394.txt for more information.
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source "lib/kunit/Kconfig"
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config KCOV_INSTRUMENT_ALL
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bool "Instrument all code by default"
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depends on KCOV
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default y
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help
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If you are doing generic system call fuzzing (like e.g. syzkaller),
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then you will want to instrument the whole kernel and you should
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say y here. If you are doing more targeted fuzzing (like e.g.
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filesystem fuzzing with AFL) then you will want to enable coverage
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for more specific subsets of files, and should say n here.
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menuconfig RUNTIME_TESTING_MENU
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bool "Runtime Testing"
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