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# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2022 Meta Platforms, Inc. and affiliates.
include ../../../build/Build.include
include ../../../scripts/Makefile.arch
include ../../../scripts/Makefile.include
include ../lib.mk
ifneq ($(LLVM),)
ifneq ($(filter %/,$(LLVM)),)
LLVM_PREFIX := $(LLVM)
else ifneq ($(filter -%,$(LLVM)),)
LLVM_SUFFIX := $(LLVM)
endif
CC := $(LLVM_PREFIX)clang$(LLVM_SUFFIX) $(CLANG_FLAGS) -fintegrated-as
else
CC := gcc
endif # LLVM
ifneq ($(CROSS_COMPILE),)
$(error CROSS_COMPILE not supported for scx selftests)
endif # CROSS_COMPILE
CURDIR := $(abspath .)
REPOROOT := $(abspath ../../../..)
TOOLSDIR := $(REPOROOT)/tools
LIBDIR := $(TOOLSDIR)/lib
BPFDIR := $(LIBDIR)/bpf
TOOLSINCDIR := $(TOOLSDIR)/include
BPFTOOLDIR := $(TOOLSDIR)/bpf/bpftool
APIDIR := $(TOOLSINCDIR)/uapi
GENDIR := $(REPOROOT)/include/generated
GENHDR := $(GENDIR)/autoconf.h
SCXTOOLSDIR := $(TOOLSDIR)/sched_ext
SCXTOOLSINCDIR := $(TOOLSDIR)/sched_ext/include
OUTPUT_DIR := $(CURDIR)/build
OBJ_DIR := $(OUTPUT_DIR)/obj
INCLUDE_DIR := $(OUTPUT_DIR)/include
BPFOBJ_DIR := $(OBJ_DIR)/libbpf
SCXOBJ_DIR := $(OBJ_DIR)/sched_ext
BPFOBJ := $(BPFOBJ_DIR)/libbpf.a
LIBBPF_OUTPUT := $(OBJ_DIR)/libbpf/libbpf.a
DEFAULT_BPFTOOL := $(OUTPUT_DIR)/sbin/bpftool
HOST_BUILD_DIR := $(OBJ_DIR)
HOST_OUTPUT_DIR := $(OUTPUT_DIR)
VMLINUX_BTF_PATHS ?= ../../../../vmlinux \
/sys/kernel/btf/vmlinux \
/boot/vmlinux-$(shell uname -r)
VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
ifeq ($(VMLINUX_BTF),)
$(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)")
endif
BPFTOOL ?= $(DEFAULT_BPFTOOL)
ifneq ($(wildcard $(GENHDR)),)
GENFLAGS := -DHAVE_GENHDR
endif
CFLAGS += -g -O2 -rdynamic -pthread -Wall -Werror $(GENFLAGS) \
-I$(INCLUDE_DIR) -I$(GENDIR) -I$(LIBDIR) \
-I$(TOOLSINCDIR) -I$(APIDIR) -I$(CURDIR)/include -I$(SCXTOOLSINCDIR)
# Silence some warnings when compiled with clang
ifneq ($(LLVM),)
CFLAGS += -Wno-unused-command-line-argument
endif
LDFLAGS = -lelf -lz -lpthread -lzstd
IS_LITTLE_ENDIAN = $(shell $(CC) -dM -E - </dev/null | \
grep 'define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__')
# Get Clang's default includes on this system, as opposed to those seen by
# '-target bpf'. This fixes "missing" files on some architectures/distros,
# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
#
# Use '-idirafter': Don't interfere with include mechanics except where the
# build would have failed anyways.
define get_sys_includes
$(shell $(1) -v -E - </dev/null 2>&1 \
| sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \
$(shell $(1) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}')
endef
BPF_CFLAGS = -g -D__TARGET_ARCH_$(SRCARCH) \
$(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian) \
-I$(CURDIR)/include -I$(CURDIR)/include/bpf-compat \
-I$(INCLUDE_DIR) -I$(APIDIR) -I$(SCXTOOLSINCDIR) \
-I$(REPOROOT)/include \
$(call get_sys_includes,$(CLANG)) \
-Wall -Wno-compare-distinct-pointer-types \
-Wno-incompatible-function-pointer-types \
-O2 -mcpu=v3
# sort removes libbpf duplicates when not cross-building
MAKE_DIRS := $(sort $(OBJ_DIR)/libbpf $(OBJ_DIR)/libbpf \
$(OBJ_DIR)/bpftool $(OBJ_DIR)/resolve_btfids \
$(INCLUDE_DIR) $(SCXOBJ_DIR))
$(MAKE_DIRS):
$(call msg,MKDIR,,$@)
$(Q)mkdir -p $@
$(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \
$(APIDIR)/linux/bpf.h \
| $(OBJ_DIR)/libbpf
$(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(OBJ_DIR)/libbpf/ \
EXTRA_CFLAGS='-g -O0 -fPIC' \
DESTDIR=$(OUTPUT_DIR) prefix= all install_headers
$(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) \
$(LIBBPF_OUTPUT) | $(OBJ_DIR)/bpftool
$(Q)$(MAKE) $(submake_extras) -C $(BPFTOOLDIR) \
ARCH= CROSS_COMPILE= CC=$(HOSTCC) LD=$(HOSTLD) \
EXTRA_CFLAGS='-g -O0' \
OUTPUT=$(OBJ_DIR)/bpftool/ \
LIBBPF_OUTPUT=$(OBJ_DIR)/libbpf/ \
LIBBPF_DESTDIR=$(OUTPUT_DIR)/ \
prefix= DESTDIR=$(OUTPUT_DIR)/ install-bin
$(INCLUDE_DIR)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) | $(INCLUDE_DIR)
ifeq ($(VMLINUX_H),)
$(call msg,GEN,,$@)
$(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@
else
$(call msg,CP,,$@)
$(Q)cp "$(VMLINUX_H)" $@
endif
$(SCXOBJ_DIR)/%.bpf.o: %.bpf.c $(INCLUDE_DIR)/vmlinux.h | $(BPFOBJ) $(SCXOBJ_DIR)
$(call msg,CLNG-BPF,,$(notdir $@))
$(Q)$(CLANG) $(BPF_CFLAGS) -target bpf -c $< -o $@
$(INCLUDE_DIR)/%.bpf.skel.h: $(SCXOBJ_DIR)/%.bpf.o $(INCLUDE_DIR)/vmlinux.h $(BPFTOOL) | $(INCLUDE_DIR)
$(eval sched=$(notdir $@))
$(call msg,GEN-SKEL,,$(sched))
$(Q)$(BPFTOOL) gen object $(<:.o=.linked1.o) $<
$(Q)$(BPFTOOL) gen object $(<:.o=.linked2.o) $(<:.o=.linked1.o)
$(Q)$(BPFTOOL) gen object $(<:.o=.linked3.o) $(<:.o=.linked2.o)
$(Q)diff $(<:.o=.linked2.o) $(<:.o=.linked3.o)
$(Q)$(BPFTOOL) gen skeleton $(<:.o=.linked3.o) name $(subst .bpf.skel.h,,$(sched)) > $@
$(Q)$(BPFTOOL) gen subskeleton $(<:.o=.linked3.o) name $(subst .bpf.skel.h,,$(sched)) > $(@:.skel.h=.subskel.h)
################
# C schedulers #
################
override define CLEAN
rm -rf $(OUTPUT_DIR)
rm -f *.o *.bpf.o *.bpf.skel.h *.bpf.subskel.h
rm -f $(TEST_GEN_PROGS)
rm -f runner
endef
# Every testcase takes all of the BPF progs are dependencies by default. This
# allows testcases to load any BPF scheduler, which is useful for testcases
# that don't need their own prog to run their test.
all_test_bpfprogs := $(foreach prog,$(wildcard *.bpf.c),$(INCLUDE_DIR)/$(patsubst %.c,%.skel.h,$(prog)))
auto-test-targets := \
create_dsq \
enq_last_no_enq_fails \
enq_select_cpu_fails \
ddsp_bogus_dsq_fail \
ddsp_vtimelocal_fail \
dsp_local_on \
exit \
hotplug \
init_enable_count \
maximal \
maybe_null \
minimal \
prog_run \
reload_loop \
select_cpu_dfl \
select_cpu_dfl_nodispatch \
select_cpu_dispatch \
select_cpu_dispatch_bad_dsq \
select_cpu_dispatch_dbl_dsp \
select_cpu_vtime \
test_example \
testcase-targets := $(addsuffix .o,$(addprefix $(SCXOBJ_DIR)/,$(auto-test-targets)))
$(SCXOBJ_DIR)/runner.o: runner.c | $(SCXOBJ_DIR)
$(CC) $(CFLAGS) -c $< -o $@
# Create all of the test targets object files, whose testcase objects will be
# registered into the runner in ELF constructors.
#
# Note that we must do double expansion here in order to support conditionally
# compiling BPF object files only if one is present, as the wildcard Make
# function doesn't support using implicit rules otherwise.
$(testcase-targets): $(SCXOBJ_DIR)/%.o: %.c $(SCXOBJ_DIR)/runner.o $(all_test_bpfprogs) | $(SCXOBJ_DIR)
$(eval test=$(patsubst %.o,%.c,$(notdir $@)))
$(CC) $(CFLAGS) -c $< -o $@ $(SCXOBJ_DIR)/runner.o
$(SCXOBJ_DIR)/util.o: util.c | $(SCXOBJ_DIR)
$(CC) $(CFLAGS) -c $< -o $@
runner: $(SCXOBJ_DIR)/runner.o $(SCXOBJ_DIR)/util.o $(BPFOBJ) $(testcase-targets)
@echo "$(testcase-targets)"
$(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
TEST_GEN_PROGS := runner
all: runner
.PHONY: all clean help
.DEFAULT_GOAL := all
.DELETE_ON_ERROR:
.SECONDARY:
|
