diff options
Diffstat (limited to 'kernel/trace/Makefile')
| -rw-r--r-- | kernel/trace/Makefile | 59 |
1 files changed, 56 insertions, 3 deletions
diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile index 057cd975d014..f934ff586bd4 100644 --- a/kernel/trace/Makefile +++ b/kernel/trace/Makefile @@ -16,6 +16,23 @@ obj-y += trace_selftest_dynamic.o endif endif +# Allow some files to be function traced +ifdef CONFIG_FUNCTION_SELF_TRACING +CFLAGS_trace_output.o = $(CC_FLAGS_FTRACE) +CFLAGS_trace_seq.o = $(CC_FLAGS_FTRACE) +CFLAGS_trace_stat.o = $(CC_FLAGS_FTRACE) +CFLAGS_tracing_map.o = $(CC_FLAGS_FTRACE) +CFLAGS_synth_event_gen_test.o = $(CC_FLAGS_FTRACE) +CFLAGS_trace_events.o = $(CC_FLAGS_FTRACE) +CFLAGS_trace_syscalls.o = $(CC_FLAGS_FTRACE) +CFLAGS_trace_events_filter.o = $(CC_FLAGS_FTRACE) +CFLAGS_trace_events_trigger.o = $(CC_FLAGS_FTRACE) +CFLAGS_trace_events_synth.o = $(CC_FLAGS_FTRACE) +CFLAGS_trace_events_hist.o = $(CC_FLAGS_FTRACE) +CFLAGS_trace_events_user.o = $(CC_FLAGS_FTRACE) +CFLAGS_trace_dynevent.o = $(CC_FLAGS_FTRACE) +endif + ifdef CONFIG_FTRACE_STARTUP_TEST CFLAGS_trace_kprobe_selftest.o = $(CC_FLAGS_FTRACE) obj-$(CONFIG_KPROBE_EVENTS) += trace_kprobe_selftest.o @@ -31,9 +48,10 @@ ifdef CONFIG_GCOV_PROFILE_FTRACE GCOV_PROFILE := y endif -# Functions in this file could be invoked from early interrupt -# code and produce random code coverage. +# Functions in these files can run from IRQ entry before hardirq context +# is visible to KCOV, and produce coverage unrelated to syscall inputs. KCOV_INSTRUMENT_trace_preemptirq.o := n +KCOV_INSTRUMENT_trace_irqsoff.o := n CFLAGS_bpf_trace.o := -I$(src) @@ -51,6 +69,8 @@ obj-$(CONFIG_TRACING) += trace_output.o obj-$(CONFIG_TRACING) += trace_seq.o obj-$(CONFIG_TRACING) += trace_stat.o obj-$(CONFIG_TRACING) += trace_printk.o +obj-$(CONFIG_TRACING) += trace_pid.o +obj-$(CONFIG_TRACER_SNAPSHOT) += trace_snapshot.o obj-$(CONFIG_TRACING) += pid_list.o obj-$(CONFIG_TRACING_MAP) += tracing_map.o obj-$(CONFIG_PREEMPTIRQ_DELAY_TEST) += preemptirq_delay_test.o @@ -82,7 +102,7 @@ obj-$(CONFIG_EVENT_TRACING) += trace_event_perf.o endif obj-$(CONFIG_EVENT_TRACING) += trace_events_filter.o obj-$(CONFIG_EVENT_TRACING) += trace_events_trigger.o -obj-$(CONFIG_PROBE_EVENTS) += trace_eprobe.o +obj-$(CONFIG_EPROBE_EVENTS) += trace_eprobe.o obj-$(CONFIG_TRACE_EVENT_INJECT) += trace_events_inject.o obj-$(CONFIG_SYNTH_EVENTS) += trace_events_synth.o obj-$(CONFIG_HIST_TRIGGERS) += trace_events_hist.o @@ -110,4 +130,37 @@ obj-$(CONFIG_FPROBE_EVENTS) += trace_fprobe.o obj-$(CONFIG_TRACEPOINT_BENCHMARK) += trace_benchmark.o obj-$(CONFIG_RV) += rv/ +obj-$(CONFIG_TRACE_REMOTE) += trace_remote.o +obj-$(CONFIG_SIMPLE_RING_BUFFER) += simple_ring_buffer.o +obj-$(CONFIG_TRACE_REMOTE_TEST) += remote_test.o + +# simple_ring_buffer is used by the pKVM hypervisor which does not have access +# to all kernel symbols. Fail the build if forbidden symbols are found. + +# Basic compiler and tooling-generated symbols that can safely be left +# undefined. Ensure KASAN is enabled to avoid logic that may disable +# FORTIFY_SOURCE when KASAN is not enabled. undefsyms_base.o does not +# automatically get KASAN flags because it is not linked into vmlinux. +targets += undefsyms_base.o +KASAN_SANITIZE_undefsyms_base.o := y + +UNDEFINED_ALLOWLIST = __asan __gcov __kasan __kcsan __hwasan __sancov __sanitizer __tsan __ubsan __msan \ + __aeabi_unwind_cpp __s390_indirect_jump __x86_indirect_thunk simple_ring_buffer \ + $(shell $(NM) -u $(obj)/undefsyms_base.o 2>/dev/null | awk '{print $$2}') + +quiet_cmd_check_undefined = NM $< + cmd_check_undefined = \ + undefsyms=$$($(NM) -u $< | grep -v $(addprefix -e , $(UNDEFINED_ALLOWLIST)) || true); \ + if [ -n "$$undefsyms" ]; then \ + echo "Unexpected symbols in $<:" >&2; \ + echo "$$undefsyms" >&2; \ + false; \ + fi; \ + touch $@ + +$(obj)/%.o.checked: $(obj)/%.o $(obj)/undefsyms_base.o FORCE + $(call if_changed,check_undefined) + +always-$(CONFIG_SIMPLE_RING_BUFFER) += simple_ring_buffer.o.checked + libftrace-y := ftrace.o |