c0fa1b6c3e
This patch tests the BTF loading, map_create with BTF
and the changes in libbpf.
-r: Raw tests that test raw crafted BTF data
-f: Test LLVM compiled bpf prog with BTF data
-g: Test BPF_OBJ_GET_INFO_BY_FD for btf_fd
-p: Test pretty print
The tools/testing/selftests/bpf/Makefile will probe
for BTF support in llc and pahole before generating
debug info (-g) and convert them to BTF. You can supply
the BTF supported binary through the following make variables:
LLC, BTF_PAHOLE and LLVM_OBJCOPY.
LLC: The lastest llc with -mattr=dwarfris support for the bpf target.
It is only in the master of the llvm repo for now.
BTF_PAHOLE: The modified pahole with BTF support:
https://github.com/iamkafai/pahole/tree/btf
To add a BTF section: "pahole -J bpf_prog.o"
LLVM_OBJCOPY: Any llvm-objcopy should do
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Alexei Starovoitov <ast@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
112 lines
3.0 KiB
Makefile
112 lines
3.0 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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LIBDIR := ../../../lib
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BPFDIR := $(LIBDIR)/bpf
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APIDIR := ../../../include/uapi
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GENDIR := ../../../../include/generated
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GENHDR := $(GENDIR)/autoconf.h
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ifneq ($(wildcard $(GENHDR)),)
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GENFLAGS := -DHAVE_GENHDR
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endif
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CFLAGS += -Wall -O2 -I$(APIDIR) -I$(LIBDIR) -I$(GENDIR) $(GENFLAGS) -I../../../include
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LDLIBS += -lcap -lelf -lrt -lpthread
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TEST_CUSTOM_PROGS = $(OUTPUT)/urandom_read
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all: $(TEST_CUSTOM_PROGS)
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$(TEST_CUSTOM_PROGS): urandom_read
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urandom_read: urandom_read.c
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$(CC) -o $(TEST_CUSTOM_PROGS) -static $<
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# Order correspond to 'make run_tests' order
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TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \
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test_align test_verifier_log test_dev_cgroup test_tcpbpf_user \
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test_sock test_sock_addr test_btf
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TEST_GEN_FILES = test_pkt_access.o test_xdp.o test_l4lb.o test_tcp_estats.o test_obj_id.o \
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test_pkt_md_access.o test_xdp_redirect.o test_xdp_meta.o sockmap_parse_prog.o \
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sockmap_verdict_prog.o dev_cgroup.o sample_ret0.o test_tracepoint.o \
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test_l4lb_noinline.o test_xdp_noinline.o test_stacktrace_map.o \
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sample_map_ret0.o test_tcpbpf_kern.o test_stacktrace_build_id.o \
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sockmap_tcp_msg_prog.o connect4_prog.o connect6_prog.o test_adjust_tail.o \
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test_btf_haskv.o test_btf_nokv.o
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# Order correspond to 'make run_tests' order
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TEST_PROGS := test_kmod.sh \
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test_libbpf.sh \
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test_xdp_redirect.sh \
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test_xdp_meta.sh \
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test_offload.py \
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test_sock_addr.sh
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# Compile but not part of 'make run_tests'
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TEST_GEN_PROGS_EXTENDED = test_libbpf_open
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include ../lib.mk
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BPFOBJ := $(OUTPUT)/libbpf.a
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$(TEST_GEN_PROGS): $(BPFOBJ)
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$(TEST_GEN_PROGS_EXTENDED): $(OUTPUT)/libbpf.a
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$(OUTPUT)/test_dev_cgroup: cgroup_helpers.c
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$(OUTPUT)/test_sock: cgroup_helpers.c
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$(OUTPUT)/test_sock_addr: cgroup_helpers.c
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.PHONY: force
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# force a rebuild of BPFOBJ when its dependencies are updated
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force:
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$(BPFOBJ): force
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$(MAKE) -C $(BPFDIR) OUTPUT=$(OUTPUT)/
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CLANG ?= clang
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LLC ?= llc
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LLVM_OBJCOPY ?= llvm-objcopy
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BTF_PAHOLE ?= pahole
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PROBE := $(shell $(LLC) -march=bpf -mcpu=probe -filetype=null /dev/null 2>&1)
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# Let newer LLVM versions transparently probe the kernel for availability
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# of full BPF instruction set.
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ifeq ($(PROBE),)
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CPU ?= probe
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else
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CPU ?= generic
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endif
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CLANG_FLAGS = -I. -I./include/uapi -I../../../include/uapi \
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-Wno-compare-distinct-pointer-types
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$(OUTPUT)/test_l4lb_noinline.o: CLANG_FLAGS += -fno-inline
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$(OUTPUT)/test_xdp_noinline.o: CLANG_FLAGS += -fno-inline
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BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help |& grep dwarfris)
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BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help |& grep BTF)
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BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --version |& grep LLVM)
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ifneq ($(BTF_LLC_PROBE),)
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ifneq ($(BTF_PAHOLE_PROBE),)
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ifneq ($(BTF_OBJCOPY_PROBE),)
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CLANG_FLAGS += -g
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LLC_FLAGS += -mattr=dwarfris
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DWARF2BTF = y
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endif
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endif
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endif
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$(OUTPUT)/%.o: %.c
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$(CLANG) $(CLANG_FLAGS) \
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-O2 -target bpf -emit-llvm -c $< -o - | \
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$(LLC) -march=bpf -mcpu=$(CPU) $(LLC_FLAGS) -filetype=obj -o $@
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ifeq ($(DWARF2BTF),y)
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$(BTF_PAHOLE) -J $@
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endif
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EXTRA_CLEAN := $(TEST_CUSTOM_PROGS)
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