mirror of
https://github.com/torvalds/linux
synced 2024-07-21 10:41:44 +00:00
30f3bb0977
Added test cases for basic functions and performance of functions kallsyms_lookup_name(), kallsyms_on_each_symbol() and kallsyms_on_each_match_symbol(). It also calculates the compression rate of the kallsyms compression algorithm for the current symbol set. The basic functions test begins by testing a set of symbols whose address values are known. Then, traverse all symbol addresses and find the corresponding symbol name based on the address. It's impossible to determine whether these addresses are correct, but we can use the above three functions along with the addresses to test each other. Due to the traversal operation of kallsyms_on_each_symbol() is too slow, only 60 symbols can be tested in one second, so let it test on average once every 128 symbols. The other two functions validate all symbols. If the basic functions test is passed, print only performance test results. If the test fails, print error information, but do not perform subsequent performance tests. Start self-test automatically after system startup if CONFIG_KALLSYMS_SELFTEST=y. Example of output content: (prefix 'kallsyms_selftest:' is omitted start --------------------------------------------------------- | nr_symbols | compressed size | original size | ratio(%) | |---------------------------------------------------------| | 107543 | 1357912 | 2407433 | 56.40 | --------------------------------------------------------- kallsyms_lookup_name() looked up 107543 symbols The time spent on each symbol is (ns): min=630, max=35295, avg=7353 kallsyms_on_each_symbol() traverse all: 11782628 ns kallsyms_on_each_match_symbol() traverse all: 9261 ns finish Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
163 lines
5.2 KiB
Makefile
163 lines
5.2 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# Makefile for the linux kernel.
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#
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obj-y = fork.o exec_domain.o panic.o \
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cpu.o exit.o softirq.o resource.o \
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sysctl.o capability.o ptrace.o user.o \
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signal.o sys.o umh.o workqueue.o pid.o task_work.o \
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extable.o params.o \
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kthread.o sys_ni.o nsproxy.o \
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notifier.o ksysfs.o cred.o reboot.o \
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async.o range.o smpboot.o ucount.o regset.o
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obj-$(CONFIG_USERMODE_DRIVER) += usermode_driver.o
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obj-$(CONFIG_MODULES) += kmod.o
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obj-$(CONFIG_MULTIUSER) += groups.o
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ifdef CONFIG_FUNCTION_TRACER
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# Do not trace internal ftrace files
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CFLAGS_REMOVE_irq_work.o = $(CC_FLAGS_FTRACE)
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endif
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# Prevents flicker of uninteresting __do_softirq()/__local_bh_disable_ip()
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# in coverage traces.
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KCOV_INSTRUMENT_softirq.o := n
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# Avoid KCSAN instrumentation in softirq ("No shared variables, all the data
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# are CPU local" => assume no data races), to reduce overhead in interrupts.
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KCSAN_SANITIZE_softirq.o = n
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# These are called from save_stack_trace() on slub debug path,
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# and produce insane amounts of uninteresting coverage.
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KCOV_INSTRUMENT_extable.o := n
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KCOV_INSTRUMENT_stacktrace.o := n
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# Don't self-instrument.
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KCOV_INSTRUMENT_kcov.o := n
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# If sanitizers detect any issues in kcov, it may lead to recursion
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# via printk, etc.
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KASAN_SANITIZE_kcov.o := n
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KCSAN_SANITIZE_kcov.o := n
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UBSAN_SANITIZE_kcov.o := n
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KMSAN_SANITIZE_kcov.o := n
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CFLAGS_kcov.o := $(call cc-option, -fno-conserve-stack) -fno-stack-protector
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# Don't instrument error handlers
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CFLAGS_REMOVE_cfi.o := $(CC_FLAGS_CFI)
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obj-y += sched/
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obj-y += locking/
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obj-y += power/
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obj-y += printk/
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obj-y += irq/
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obj-y += rcu/
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obj-y += livepatch/
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obj-y += dma/
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obj-y += entry/
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obj-$(CONFIG_MODULES) += module/
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obj-$(CONFIG_KCMP) += kcmp.o
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obj-$(CONFIG_FREEZER) += freezer.o
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obj-$(CONFIG_PROFILING) += profile.o
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obj-$(CONFIG_STACKTRACE) += stacktrace.o
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obj-y += time/
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obj-$(CONFIG_FUTEX) += futex/
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obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o
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obj-$(CONFIG_SMP) += smp.o
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ifneq ($(CONFIG_SMP),y)
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obj-y += up.o
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endif
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obj-$(CONFIG_UID16) += uid16.o
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obj-$(CONFIG_MODULE_SIG_FORMAT) += module_signature.o
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obj-$(CONFIG_KALLSYMS) += kallsyms.o
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obj-$(CONFIG_KALLSYMS_SELFTEST) += kallsyms_selftest.o
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obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o
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obj-$(CONFIG_CRASH_CORE) += crash_core.o
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obj-$(CONFIG_KEXEC_CORE) += kexec_core.o
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obj-$(CONFIG_KEXEC) += kexec.o
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obj-$(CONFIG_KEXEC_FILE) += kexec_file.o
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obj-$(CONFIG_KEXEC_ELF) += kexec_elf.o
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obj-$(CONFIG_BACKTRACE_SELF_TEST) += backtracetest.o
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obj-$(CONFIG_COMPAT) += compat.o
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obj-$(CONFIG_CGROUPS) += cgroup/
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obj-$(CONFIG_UTS_NS) += utsname.o
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obj-$(CONFIG_USER_NS) += user_namespace.o
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obj-$(CONFIG_PID_NS) += pid_namespace.o
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obj-$(CONFIG_IKCONFIG) += configs.o
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obj-$(CONFIG_IKHEADERS) += kheaders.o
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obj-$(CONFIG_SMP) += stop_machine.o
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obj-$(CONFIG_AUDIT) += audit.o auditfilter.o
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obj-$(CONFIG_AUDITSYSCALL) += auditsc.o audit_watch.o audit_fsnotify.o audit_tree.o
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obj-$(CONFIG_GCOV_KERNEL) += gcov/
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obj-$(CONFIG_KCOV) += kcov.o
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obj-$(CONFIG_KPROBES) += kprobes.o
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obj-$(CONFIG_FAIL_FUNCTION) += fail_function.o
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obj-$(CONFIG_KGDB) += debug/
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obj-$(CONFIG_DETECT_HUNG_TASK) += hung_task.o
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obj-$(CONFIG_LOCKUP_DETECTOR) += watchdog.o
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obj-$(CONFIG_HARDLOCKUP_DETECTOR_PERF) += watchdog_hld.o
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obj-$(CONFIG_SECCOMP) += seccomp.o
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obj-$(CONFIG_RELAY) += relay.o
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obj-$(CONFIG_SYSCTL) += utsname_sysctl.o
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obj-$(CONFIG_TASK_DELAY_ACCT) += delayacct.o
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obj-$(CONFIG_TASKSTATS) += taskstats.o tsacct.o
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obj-$(CONFIG_TRACEPOINTS) += tracepoint.o
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obj-$(CONFIG_LATENCYTOP) += latencytop.o
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obj-$(CONFIG_FUNCTION_TRACER) += trace/
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obj-$(CONFIG_TRACING) += trace/
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obj-$(CONFIG_TRACE_CLOCK) += trace/
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obj-$(CONFIG_RING_BUFFER) += trace/
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obj-$(CONFIG_TRACEPOINTS) += trace/
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obj-$(CONFIG_RETHOOK) += trace/
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obj-$(CONFIG_IRQ_WORK) += irq_work.o
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obj-$(CONFIG_CPU_PM) += cpu_pm.o
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obj-$(CONFIG_BPF) += bpf/
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obj-$(CONFIG_KCSAN) += kcsan/
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obj-$(CONFIG_SHADOW_CALL_STACK) += scs.o
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obj-$(CONFIG_HAVE_STATIC_CALL) += static_call.o
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obj-$(CONFIG_HAVE_STATIC_CALL_INLINE) += static_call_inline.o
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obj-$(CONFIG_CFI_CLANG) += cfi.o
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obj-$(CONFIG_PERF_EVENTS) += events/
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obj-$(CONFIG_USER_RETURN_NOTIFIER) += user-return-notifier.o
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obj-$(CONFIG_PADATA) += padata.o
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obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
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obj-$(CONFIG_JUMP_LABEL) += jump_label.o
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obj-$(CONFIG_CONTEXT_TRACKING) += context_tracking.o
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obj-$(CONFIG_TORTURE_TEST) += torture.o
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obj-$(CONFIG_HAS_IOMEM) += iomem.o
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obj-$(CONFIG_RSEQ) += rseq.o
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obj-$(CONFIG_WATCH_QUEUE) += watch_queue.o
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obj-$(CONFIG_RESOURCE_KUNIT_TEST) += resource_kunit.o
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obj-$(CONFIG_SYSCTL_KUNIT_TEST) += sysctl-test.o
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CFLAGS_stackleak.o += $(DISABLE_STACKLEAK_PLUGIN)
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obj-$(CONFIG_GCC_PLUGIN_STACKLEAK) += stackleak.o
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KASAN_SANITIZE_stackleak.o := n
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KCSAN_SANITIZE_stackleak.o := n
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KCOV_INSTRUMENT_stackleak.o := n
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obj-$(CONFIG_SCF_TORTURE_TEST) += scftorture.o
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$(obj)/configs.o: $(obj)/config_data.gz
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targets += config_data config_data.gz
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$(obj)/config_data.gz: $(obj)/config_data FORCE
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$(call if_changed,gzip)
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filechk_cat = cat $<
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$(obj)/config_data: $(KCONFIG_CONFIG) FORCE
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$(call filechk,cat)
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$(obj)/kheaders.o: $(obj)/kheaders_data.tar.xz
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quiet_cmd_genikh = CHK $(obj)/kheaders_data.tar.xz
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cmd_genikh = $(CONFIG_SHELL) $(srctree)/kernel/gen_kheaders.sh $@
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$(obj)/kheaders_data.tar.xz: FORCE
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$(call cmd,genikh)
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clean-files := kheaders_data.tar.xz kheaders.md5
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