# Copyright 2017 syzkaller project authors. All rights reserved.
# Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.

# There are 3 OS/arch pairs:
#  - HOSTOS/HOSTARCH: pair where syz-manager will run.
#  - TARGETOS/TARGETVMARCH: pair of the target OS under test.
#  - TARGETOS/TARGETARCH: pair of the target test process.
#
# The last 2 differ for e.g. amd64 OS and 386 test processes (compat syscall testing).
# All pairs default to the current machine. All but BUILD can be overriden.
#
# For example, to test linux/amd64 on linux/amd64, you just run:
#    make
# To test linux/arm64 from darwin/amd64 host, run:
#    make HOSTOS=darwin HOSTARCH=amd64 TARGETOS=linux TARGETARCH=arm64
# To test x86 compat syscalls, run:
#    make TARGETVMARCH=amd64 TARGETARCH=386
#
# There is one special case for extracting constants for Android
# (you don't need this unless you update system call descriptions):
#    make extract TARGETOS=android SOURCEDIR=/path/to/android/checkout

define newline


endef
ENV := $(subst \n,$(newline),$(shell CI=$(CI)\
	SOURCEDIR=$(SOURCEDIR) HOSTOS=$(HOSTOS) HOSTARCH=$(HOSTARCH) \
	TARGETOS=$(TARGETOS) TARGETARCH=$(TARGETARCH) TARGETVMARCH=$(TARGETVMARCH) \
	SYZ_CLANG=$(SYZ_CLANG) \
	go run tools/syz-make/make.go))
# Uncomment in case of emergency.
# $(info $(ENV))
$(eval $(ENV))
ifneq ("$(SYZERROR)", "")
$(error $(SYZERROR))
endif
ifeq ("$(NCORES)", "")
$(error syz-make failed)
endif
ifeq ("$(MAKELEVEL)", "0")
	MAKEFLAGS += -j$(NCORES) --no-print-directory
endif

GO := go
HOSTGO := go
# By default, build all Go binaries as static. We don't need cgo and it is
# known to cause problems at least on Android emulator.
CGO_ENABLED ?= 0
export CGO_ENABLED
TARGETGOOS := $(TARGETOS)
TARGETGOARCH := $(TARGETVMARCH)
export GO111MODULE=on
export GOBIN=$(shell pwd -P)/bin

GITREV=$(shell git rev-parse HEAD)
ifeq ("$(shell git diff --shortstat)", "")
	REV=$(GITREV)
else
	REV=$(GITREV)+
endif
GITREVDATE=$(shell git log -n 1 --format="%ad")

# Don't generate symbol table and DWARF debug info.
# Reduces build time and binary sizes considerably.
# That's only needed if you use gdb or nm.
# If you need that, build manually without these flags.
GOFLAGS := "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=$(REV) -X 'github.com/google/syzkaller/prog.gitRevisionDate=$(GITREVDATE)'"

GOHOSTFLAGS := $(GOFLAGS)
GOTARGETFLAGS := $(GOFLAGS)
ifneq ("$(GOTAGS)", "")
	GOHOSTFLAGS += "-tags=$(GOTAGS)"
endif
GOTARGETFLAGS += "-tags=syz_target syz_os_$(TARGETOS) syz_arch_$(TARGETVMARCH) $(GOTAGS)"

ifeq ("$(TARGETOS)", "test")
	TARGETGOOS := $(HOSTOS)
	TARGETGOARCH := $(HOSTARCH)
endif

ifeq ("$(TARGETOS)", "akaros")
	TARGETGOOS := $(HOSTOS)
	TARGETGOARCH := $(HOSTARCH)
endif

ifeq ("$(TARGETOS)", "fuchsia")
	TARGETGOOS := $(HOSTOS)
	TARGETGOARCH := $(HOSTARCH)
endif

ifeq ("$(TARGETOS)", "trusty")
	TARGETGOOS := $(HOSTOS)
	TARGETGOARCH := $(HOSTARCH)
endif

.PHONY: all clean host target \
	manager runtest fuzzer executor \
	ci hub \
	execprog mutate prog2c trace2syz stress repro upgrade db \
	usbgen symbolize crush \
	bin/syz-extract bin/syz-fmt \
	extract generate generate_go generate_sys \
	format format_go format_cpp format_sys \
	tidy test test_race check_copyright check_language check_whitespace check_links check_diff check_commits \
	presubmit presubmit_smoke presubmit_build presubmit_arch presubmit_big presubmit_race presubmit_old

all: host target
host: manager runtest repro mutate prog2c db upgrade
target: fuzzer execprog stress executor

executor: descriptions
ifneq ("$(BUILDOS)", "$(NATIVEBUILDOS)")
	$(info ************************************************************************************)
	$(info Executor will not be built)
	$(info Building executor for ${TARGETOS} is not supported on ${BUILDOS})
	$(info ************************************************************************************)
else
ifneq ("$(NO_CROSS_COMPILER)", "")
	$(info ************************************************************************************)
	$(info Executor will not be built)
	$(info Native cross-compiler is missing/broken:)
	$(info $(NO_CROSS_COMPILER))
	$(info ************************************************************************************)
else
	mkdir -p ./bin/$(TARGETOS)_$(TARGETARCH)
	$(CC) -o ./bin/$(TARGETOS)_$(TARGETARCH)/syz-executor$(EXE) executor/executor.cc \
		$(ADDCFLAGS) $(CFLAGS) -DGOOS_$(TARGETOS)=1 -DGOARCH_$(TARGETARCH)=1 \
		-DHOSTGOOS_$(HOSTOS)=1 -DGIT_REVISION=\"$(REV)\"
endif
endif

# .descriptions is a stub file that serves as a substitute for all files generated by syz-sysgen:
# sys/*/gen/*.go, executor/defs.h, executor/syscalls.h
# syz-sysgen generates them all at once, so we can't make each of them an independent target.
.PHONY: descriptions
descriptions:
	go list -f '{{.Stale}}' ./sys/syz-sysgen | grep -q false || go install ./sys/syz-sysgen
	$(MAKE) .descriptions

.descriptions: sys/*/*.txt sys/*/*.const bin/syz-sysgen
	bin/syz-sysgen
	touch .descriptions

manager: descriptions
	GOOS=$(HOSTOS) GOARCH=$(HOSTARCH) $(HOSTGO) build $(GOHOSTFLAGS) -o ./bin/syz-manager github.com/google/syzkaller/syz-manager

runtest: descriptions
	GOOS=$(HOSTOS) GOARCH=$(HOSTARCH) $(HOSTGO) build $(GOHOSTFLAGS) -o ./bin/syz-runtest github.com/google/syzkaller/tools/syz-runtest

fuzzer: descriptions
	GOOS=$(TARGETGOOS) GOARCH=$(TARGETGOARCH) $(GO) build $(GOTARGETFLAGS) -o ./bin/$(TARGETOS)_$(TARGETVMARCH)/syz-fuzzer$(EXE) github.com/google/syzkaller/syz-fuzzer

execprog: descriptions
	GOOS=$(TARGETGOOS) GOARCH=$(TARGETGOARCH) $(GO) build $(GOTARGETFLAGS) -o ./bin/$(TARGETOS)_$(TARGETVMARCH)/syz-execprog$(EXE) github.com/google/syzkaller/tools/syz-execprog

ci: descriptions
	GOOS=$(HOSTOS) GOARCH=$(HOSTARCH) $(HOSTGO) build $(GOHOSTFLAGS) -o ./bin/syz-ci github.com/google/syzkaller/syz-ci

hub: descriptions
	GOOS=$(HOSTOS) GOARCH=$(HOSTARCH) $(HOSTGO) build $(GOHOSTFLAGS) -o ./bin/syz-hub github.com/google/syzkaller/syz-hub

repro: descriptions
	GOOS=$(HOSTOS) GOARCH=$(HOSTARCH) $(HOSTGO) build $(GOHOSTFLAGS) -o ./bin/syz-repro github.com/google/syzkaller/tools/syz-repro

mutate: descriptions
	GOOS=$(HOSTOS) GOARCH=$(HOSTARCH) $(HOSTGO) build $(GOHOSTFLAGS) -o ./bin/syz-mutate github.com/google/syzkaller/tools/syz-mutate

prog2c: descriptions
	GOOS=$(HOSTOS) GOARCH=$(HOSTARCH) $(HOSTGO) build $(GOHOSTFLAGS) -o ./bin/syz-prog2c github.com/google/syzkaller/tools/syz-prog2c

crush: descriptions
	GOOS=$(HOSTOS) GOARCH=$(HOSTARCH) $(HOSTGO) build $(GOHOSTFLAGS) -o ./bin/syz-crush github.com/google/syzkaller/tools/syz-crush

reporter: descriptions
	GOOS=$(HOSTOS) GOARCH=$(HOSTARCH) $(HOSTGO) build $(GOHOSTFLAGS) -o ./bin/syz-reporter github.com/google/syzkaller/tools/syz-reporter

stress: descriptions
	GOOS=$(TARGETGOOS) GOARCH=$(TARGETGOARCH) $(GO) build $(GOTARGETFLAGS) -o ./bin/$(TARGETOS)_$(TARGETVMARCH)/syz-stress$(EXE) github.com/google/syzkaller/tools/syz-stress

db: descriptions
	GOOS=$(HOSTOS) GOARCH=$(HOSTARCH) $(HOSTGO) build $(GOHOSTFLAGS) -o ./bin/syz-db github.com/google/syzkaller/tools/syz-db

upgrade: descriptions
	GOOS=$(HOSTOS) GOARCH=$(HOSTARCH) $(HOSTGO) build $(GOHOSTFLAGS) -o ./bin/syz-upgrade github.com/google/syzkaller/tools/syz-upgrade

trace2syz: descriptions
	GOOS=$(HOSTOS) GOARCH=$(HOSTARCH) $(HOSTGO) build $(GOHOSTFLAGS) -o ./bin/syz-trace2syz github.com/google/syzkaller/tools/syz-trace2syz

expand: descriptions
	GOOS=$(HOSTOS) GOARCH=$(HOSTARCH) $(HOSTGO) build $(GOHOSTFLAGS) -o ./bin/syz-expand github.com/google/syzkaller/tools/syz-expand

usbgen:
	GOOS=$(HOSTOS) GOARCH=$(HOSTARCH) $(HOSTGO) build $(GOHOSTFLAGS) -o ./bin/syz-usbgen github.com/google/syzkaller/tools/syz-usbgen

symbolize:
	GOOS=$(HOSTOS) GOARCH=$(HOSTARCH) $(HOSTGO) build $(GOHOSTFLAGS) -o ./bin/syz-symbolize github.com/google/syzkaller/tools/syz-symbolize

# `extract` extracts const files from various kernel sources, and may only
# re-generate parts of files.
extract: bin/syz-extract
ifeq ($(TARGETOS),fuchsia)
	$(MAKE) generate_fidl TARGETARCH=amd64
	$(MAKE) generate_fidl TARGETARCH=arm64
else
endif
	bin/syz-extract -build -os=$(TARGETOS) -sourcedir=$(SOURCEDIR) $(FILES)

bin/syz-extract:
	GOOS=$(HOSTOS) GOARCH=$(HOSTARCH) $(HOSTGO) build $(GOHOSTFLAGS) -o $@ ./sys/syz-extract

# `generate` does *not* depend on any kernel sources, and generates everything
# in one pass, for all arches. It can be run on a bare syzkaller checkout.
generate:
	$(MAKE) descriptions
	$(MAKE) generate_go
	$(MAKE) format

generate_go: format_cpp
	$(GO) generate ./pkg/csource ./executor ./pkg/ifuzz ./pkg/build ./pkg/html

generate_fidl:
ifeq ($(TARGETOS),fuchsia)
	$(HOSTGO) generate ./sys/fuchsia
	$(MAKE) format_sys
else
endif

generate_trace2syz:
	(cd tools/syz-trace2syz/parser; ragel -Z -G2 -o lex.go straceLex.rl)
	(cd tools/syz-trace2syz/parser; goyacc -o strace.go -p Strace -v="" strace.y)

format: format_go format_cpp format_sys

format_go:
	$(GO) fmt ./...

format_cpp:
	clang-format --style=file -i executor/*.cc executor/*.h \
		executor/android/android_seccomp.h \
		tools/kcovtrace/*.c tools/kcovfuzzer/*.c tools/fops_probe/*.cc

format_sys: bin/syz-fmt
	bin/syz-fmt all

bin/syz-fmt:
	$(HOSTGO) build $(GOHOSTFLAGS) -o $@ ./tools/syz-fmt

tidy: descriptions
	clang-tidy -quiet -header-filter=.* -warnings-as-errors=* \
		-checks=-*,misc-definitions-in-headers,bugprone-macro-parentheses,clang-analyzer-*,-clang-analyzer-security.insecureAPI*,-clang-analyzer-optin.performance* \
		-extra-arg=-DGOOS_$(TARGETOS)=1 -extra-arg=-DGOARCH_$(TARGETARCH)=1 \
		-extra-arg=-DHOSTGOOS_$(HOSTOS)=1 -extra-arg=-DGIT_REVISION=\"$(REV)\" \
		executor/*.cc

lint:
	# This should install the command from our vendor dir.
	CGO_ENABLED=1 $(HOSTGO) install github.com/golangci/golangci-lint/cmd/golangci-lint
	CGO_ENABLED=1 $(HOSTGO) build -buildmode=plugin -o bin/syz-linter.so ./tools/syz-linter
	bin/golangci-lint run ./...

presubmit:
	$(MAKE) presubmit_smoke
	$(MAKE) presubmit_arch
	$(MAKE) presubmit_race

presubmit_smoke:
	$(MAKE) generate
	$(MAKE) -j100 check_commits check_diff check_copyright check_language check_whitespace check_links presubmit_build tidy
	$(MAKE) test

presubmit_build:
	# Run go build before lint for better error messages if build is broken.
	# This does not check build of test files, but running go test takes too long (even for building).
	$(GO) build ./...
	$(MAKE) lint

presubmit_arch: descriptions
	env HOSTOS=linux HOSTARCH=amd64 $(MAKE) host
	env HOSTOS=freebsd HOSTARCH=amd64 $(MAKE) host
	env HOSTOS=netbsd HOSTARCH=amd64 $(MAKE) host
	env HOSTOS=openbsd HOSTARCH=amd64 $(MAKE) host
	env HOSTOS=darwin HOSTARCH=amd64 $(MAKE) host
	env TARGETOS=linux TARGETARCH=amd64 $(MAKE) target
	env TARGETOS=linux TARGETARCH=amd64 SYZ_CLANG=yes $(MAKE) target
	env TARGETOS=linux TARGETARCH=386 $(MAKE) target
	env TARGETOS=linux TARGETARCH=arm64 $(MAKE) target
	env TARGETOS=linux TARGETARCH=arm $(MAKE) target
	env TARGETOS=linux TARGETARCH=mips64le $(MAKE) target
	env TARGETOS=linux TARGETARCH=ppc64le $(MAKE) target
	env TARGETOS=linux TARGETARCH=riscv64 $(MAKE) target
	env TARGETOS=linux TARGETARCH=s390x $(MAKE) target
	env TARGETOS=freebsd TARGETARCH=amd64 $(MAKE) target
	env TARGETOS=freebsd TARGETARCH=386 $(MAKE) target
	env TARGETOS=netbsd TARGETARCH=amd64 $(MAKE) target
	env TARGETOS=openbsd TARGETARCH=amd64 $(MAKE) target
	env TARGETOS=windows TARGETARCH=amd64 $(MAKE) target
	env TARGETOS=akaros TARGETARCH=amd64 $(MAKE) executor
	env TARGETOS=fuchsia TARGETARCH=amd64 $(MAKE) executor
	env TARGETOS=fuchsia TARGETARCH=arm64 $(MAKE) executor
	env TARGETOS=test TARGETARCH=64 $(MAKE) executor
	env TARGETOS=test TARGETARCH=64_fork $(MAKE) executor
	env TARGETOS=test TARGETARCH=32_shmem $(MAKE) executor
	env TARGETOS=test TARGETARCH=32_fork_shmem $(MAKE) executor

presubmit_big: descriptions
	# This target runs on CI in syz-big-env,
	# so we test packages that need GCloud SDK or OS toolchains.
	$(GO) test -short -coverprofile=.coverage.txt ./dashboard/app ./pkg/csource ./pkg/cover

presubmit_race: descriptions
	# -race requires cgo
	env CGO_ENABLED=1 $(GO) test -race; if test $$? -ne 2; then \
	env CGO_ENABLED=1 $(GO) test -race -short -bench=.* -benchtime=.2s ./... ;\
	fi

presubmit_old: descriptions
	# Binaries we can compile in syz-old-env. 386 is broken, riscv64 is missing.
	TARGETARCH=amd64 $(MAKE) target
	TARGETARCH=arm64 $(MAKE) target
	TARGETARCH=arm $(MAKE) target
	TARGETARCH=ppc64le $(MAKE) target
	TARGETARCH=mips64le $(MAKE) target
	TARGETARCH=s390x $(MAKE) target

test: descriptions
	$(GO) test -short -coverprofile=.coverage.txt ./...

clean:
	rm -rf ./bin .descriptions sys/*/gen executor/defs.h executor/syscalls.h

# For a tupical Ubuntu/Debian distribution.
# We use "|| true" for apt-get install because packages are all different on different distros.
# Also see tools/syz-env for container approach.
install_prerequisites:
	uname -a
	sudo apt-get update
	sudo apt-get install -y -q libc6-dev-i386 linux-libc-dev \
		gcc-aarch64-linux-gnu gcc-arm-linux-gnueabi gcc-powerpc64le-linux-gnu gcc-mips64el-linux-gnuabi64 || true
	sudo apt-get install -y -q g++-aarch64-linux-gnu || true
	sudo apt-get install -y -q g++-powerpc64le-linux-gnu || true
	sudo apt-get install -y -q g++-arm-linux-gnueabi || true
	sudo apt-get install -y -q g++-mips64el-linux-gnuabi64 || true
	sudo apt-get install -y -q g++-s390x-linux-gnu || true
	sudo apt-get install -y -q g++-riscv64-linux-gnu || true
	sudo apt-get install -y -q g++ || true
	sudo apt-get install -y -q clang-tidy || true
	sudo apt-get install -y -q clang clang-format ragel
	GO111MODULE=off go get -u golang.org/x/tools/cmd/goyacc

check_copyright:
	./tools/check-copyright.sh

check_language:
	./tools/check-language.sh

check_whitespace:
	./tools/check-whitespace.sh

check_commits:
	./tools/check-commits.sh

check_links:
	python ./tools/check_links.py $$(pwd) $$(find -name '*.md' | grep -v "./vendor/")

# Check that the diff is empty. This is meant to be executed after generating
# and formatting the code to make sure that everything is committed.
check_diff:
	@if [ "$(shell git --no-pager diff --name-only)" != "" ]; then \
		git --no-pager diff; \
		git --no-pager diff --name-only | \
			sed "s#.*#&:1:1: The file is not formatted/regenerated. Run 'make generate' and include it into the commit.#g"; \
		false; \
	fi