fuzz: add target/fuzz makefile rules

Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20200220041118.23264-18-alxndr@bu.edu
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

Makefile

@@ -477,7 +477,7 @@ config-host.h-timestamp: config-host.mak
 qemu-options.def: $(SRC_PATH)/qemu-options.hx $(SRC_PATH)/scripts/hxtool
 	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -h < $< > $@,"GEN","$@")
 
-TARGET_DIRS_RULES := $(foreach t, all clean install, $(addsuffix /$(t), $(TARGET_DIRS)))
+TARGET_DIRS_RULES := $(foreach t, all fuzz clean install, $(addsuffix /$(t), $(TARGET_DIRS)))
 
 SOFTMMU_ALL_RULES=$(filter %-softmmu/all, $(TARGET_DIRS_RULES))
 $(SOFTMMU_ALL_RULES): $(authz-obj-y)
@@ -490,6 +490,15 @@ ifdef DECOMPRESS_EDK2_BLOBS
 $(SOFTMMU_ALL_RULES): $(edk2-decompressed)
 endif
 
+SOFTMMU_FUZZ_RULES=$(filter %-softmmu/fuzz, $(TARGET_DIRS_RULES))
+$(SOFTMMU_FUZZ_RULES): $(authz-obj-y)
+$(SOFTMMU_FUZZ_RULES): $(block-obj-y)
+$(SOFTMMU_FUZZ_RULES): $(chardev-obj-y)
+$(SOFTMMU_FUZZ_RULES): $(crypto-obj-y)
+$(SOFTMMU_FUZZ_RULES): $(io-obj-y)
+$(SOFTMMU_FUZZ_RULES): config-all-devices.mak
+$(SOFTMMU_FUZZ_RULES): $(edk2-decompressed)
+
 .PHONY: $(TARGET_DIRS_RULES)
 # The $(TARGET_DIRS_RULES) are of the form SUBDIR/GOAL, so that
 # $(dir $@) yields the sub-directory, and $(notdir $@) yields the sub-goal
@@ -540,6 +549,9 @@ subdir-slirp: slirp/all
 $(filter %/all, $(TARGET_DIRS_RULES)): libqemuutil.a $(common-obj-y) \
 	$(qom-obj-y)
 
+$(filter %/fuzz, $(TARGET_DIRS_RULES)): libqemuutil.a $(common-obj-y) \
+	$(qom-obj-y) $(crypto-user-obj-$(CONFIG_USER_ONLY))
+
 ROM_DIRS = $(addprefix pc-bios/, $(ROMS))
 ROM_DIRS_RULES=$(foreach t, all clean, $(addsuffix /$(t), $(ROM_DIRS)))
 # Only keep -O and -g cflags
@@ -549,6 +561,7 @@ $(ROM_DIRS_RULES):
 
 .PHONY: recurse-all recurse-clean recurse-install
 recurse-all: $(addsuffix /all, $(TARGET_DIRS) $(ROM_DIRS))
+recurse-fuzz: $(addsuffix /fuzz, $(TARGET_DIRS) $(ROM_DIRS))
 recurse-clean: $(addsuffix /clean, $(TARGET_DIRS) $(ROM_DIRS))
 recurse-install: $(addsuffix /install, $(TARGET_DIRS))
 $(addsuffix /install, $(TARGET_DIRS)): all

Makefile.target

@@ -228,6 +228,22 @@ ifdef CONFIG_TRACE_SYSTEMTAP
 	rm -f *.stp
 endif
 
+ifdef CONFIG_FUZZ
+include $(SRC_PATH)/tests/qtest/fuzz/Makefile.include
+include $(SRC_PATH)/tests/qtest/Makefile.include
+
+fuzz: fuzz-vars
+fuzz-vars: QEMU_CFLAGS := $(FUZZ_CFLAGS) $(QEMU_CFLAGS)
+fuzz-vars: QEMU_LDFLAGS := $(FUZZ_LDFLAGS) $(QEMU_LDFLAGS)
+fuzz-vars: $(QEMU_PROG_FUZZ)
+dummy := $(call unnest-vars,, fuzz-obj-y)
+
+
+$(QEMU_PROG_FUZZ): config-devices.mak $(all-obj-y) $(COMMON_LDADDS) $(fuzz-obj-y)
+	$(call LINK, $(filter-out %.mak, $^))
+
+endif
+
 install: all
 ifneq ($(PROGS),)
 	$(call install-prog,$(PROGS),$(DESTDIR)$(bindir))