build.mk
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# This directory contains support for Google's oss-fuzz project. See
# https://github.com/google/oss-fuzz/tree/master/projects/qpdf
FUZZERS = \
qpdf_fuzzer \
ascii85_fuzzer \
dct_fuzzer \
flate_fuzzer \
hex_fuzzer \
lzw_fuzzer \
pngpredictor_fuzzer \
runlength_fuzzer \
tiffpredictor_fuzzer
DEFAULT_FUZZ_RUNNER := standalone_fuzz_target_runner
OBJ_DEFAULT_FUZZ := fuzz/$(OUTPUT_DIR)/$(DEFAULT_FUZZ_RUNNER).$(OBJ)
BINS_fuzz = $(foreach B,$(FUZZERS),fuzz/$(OUTPUT_DIR)/$(call binname,$(B)))
TARGETS_fuzz = $(OBJ_DEFAULT_FUZZ) $(BINS_fuzz) fuzz_corpus
# Fuzzers test private classes too, so we need libqpdf in the include path
INCLUDES_fuzz = include libqpdf
# LIB_FUZZING_ENGINE is overridden by oss-fuzz
LIB_FUZZING_ENGINE ?= $(OBJ_DEFAULT_FUZZ)
# Depend on OBJ_DEFAULT_FUZZ to ensure that it is always compiled.
# Don't depend on LIB_FUZZING_ENGINE, which we can't build. When used
# by oss-fuzz, it will be there.
$(BINS_fuzz): $(TARGETS_libqpdf) $(OBJ_DEFAULT_FUZZ)
# Files from the test suite that are good for seeding the fuzzer.
# Update $qpdf_n_test_files in qtest/fuzz.test if you change this list.
CORPUS_FROM_TEST = \
stream-data.pdf \
lin5.pdf \
field-types.pdf \
image-streams-small.pdf \
need-appearances.pdf \
outlines-with-actions.pdf \
outlines-with-old-root-dests.pdf \
page-labels-and-outlines.pdf \
page-labels-num-tree.pdf \
fuzz-16214.pdf \
issue-99b.pdf \
issue-99.pdf \
issue-100.pdf \
issue-101.pdf \
issue-106.pdf \
issue-117.pdf \
issue-119.pdf \
issue-120.pdf \
issue-141a.pdf \
issue-141b.pdf \
issue-143.pdf \
issue-146.pdf \
issue-147.pdf \
issue-148.pdf \
issue-149.pdf \
issue-150.pdf \
issue-202.pdf \
issue-263.pdf \
issue-335a.pdf \
issue-335b.pdf
# Any file that qpdf_fuzzer should be tested with can be named
# something.fuzz and dropped into this directory.
CORPUS_OTHER = $(wildcard fuzz/qpdf_extra/*.fuzz)
# -----
CORPUS_EXTRA := $(foreach F,$(CORPUS_FROM_TEST),qpdf/qtest/qpdf/$F) \
$(CORPUS_OTHER)
CORPUS_DIR := fuzz/$(OUTPUT_DIR)/qpdf_fuzzer_seed_corpus
.PHONY: fuzz_corpus
fuzz_corpus:: fuzz/$(OUTPUT_DIR)/fuzz_corpus.stamp
$(foreach F,$(CORPUS_EXTRA),$(eval \
SHA1_$(notdir $(F)) := $(shell perl fuzz/get_sha1 < $F)))
$(foreach F,$(CORPUS_EXTRA),$(eval \
fuzz_corpus:: $(CORPUS_DIR)/$(SHA1_$(notdir $(F)))))
$(foreach F,$(CORPUS_EXTRA),$(eval \
$(CORPUS_DIR)/$(SHA1_$(notdir $(F))): $(F) ; \
mkdir -p $(CORPUS_DIR); \
cp $(F) $(CORPUS_DIR)/$(SHA1_$(notdir $(F)))))
fuzz/$(OUTPUT_DIR)/fuzz_corpus.stamp: fuzz/original-corpus.tar.gz $(CORPUS_EXTRA)
mkdir -p $(CORPUS_DIR)
(cd $(CORPUS_DIR); tar xzf ../../original-corpus.tar.gz)
touch $@
$(foreach B,$(FUZZERS),$(eval \
OBJS_$(B) = $(call src_to_obj,fuzz/$(B).cc)))
ifeq ($(GENDEPS),1)
-include $(foreach B,$(FUZZERS),$(call obj_to_dep,$(OBJS_$(B))))
endif
$(foreach B,$(DEFAULT_FUZZ_RUNNER),$(eval \
fuzz/$(OUTPUT_DIR)/%.$(OBJ): fuzz/$(B).cc ; \
$(call compile,fuzz/$(B).cc,$(INCLUDES_fuzz))))
$(foreach B,$(FUZZERS),$(eval \
$(OBJS_$(B)): fuzz/$(OUTPUT_DIR)/%.$(OBJ): fuzz/$(B).cc ; \
$(call compile,fuzz/$(B).cc,$(INCLUDES_fuzz))))
ifeq ($(suffix $(LIB_FUZZING_ENGINE)),.$(OBJ))
FUZZ_as_obj := $(LIB_FUZZING_ENGINE)
FUZZ_as_lib :=
else
FUZZ_as_obj :=
FUZZ_as_lib := $(LIB_FUZZING_ENGINE)
endif
$(foreach B,$(FUZZERS),$(eval \
fuzz/$(OUTPUT_DIR)/$(call binname,$(B)): $(OBJS_$(B)) ; \
$(call makebin,$(OBJS_$(B)) $(FUZZ_as_obj),$$@,$(LDFLAGS_libqpdf) $(LDFLAGS),$(FUZZ_as_lib) $(LIBS_libqpdf) $(LIBS))))
ifeq ($(OSS_FUZZ),1)
# Build fuzzers linked with static libraries and installed into a
# location provided by oss-fuzz. This is specifically to support the
# oss-fuzz project. These rules won't on systems that don't allow main
# to be in a library or don't name their libraries libsomething.a.
STATIC_BINS_fuzz := $(foreach B,$(FUZZERS),fuzz/$(OUTPUT_DIR)/static/$(call binname,$(B)))
$(STATIC_BINS_fuzz): $(TARGETS_libqpdf) $(OBJ_DEFAULT_FUZZ)
# OUT is provided in the oss-fuzz environment
OUT ?= $(CURDIR)/fuzz/$(OUTPUT_DIR)/fuzz-install
# These are not fully static, but they statically link with qpdf and
# our external dependencies other than system libraries.
$(foreach B,$(FUZZERS),$(eval \
fuzz/$(OUTPUT_DIR)/static/$(call binname,$(B)): $(OBJS_$(B)) ; \
$(call makebin,$(OBJS_$(B)),$$@,$(LDFLAGS_libqpdf) $(LDFLAGS),$(LIB_FUZZING_ENGINE) $(patsubst -l%,-l:lib%.a,$(LIBS_libqpdf) $(LIBS)))))
# The install_fuzz target is used by build.sh in oss-fuzz's qpdf project.
install_fuzz: $(STATIC_BINS_fuzz)
mkdir -p $(OUT)
cp fuzz/pdf.dict $(STATIC_BINS_fuzz) $(OUT)/
for B in $(FUZZERS); do \
if test -f fuzz/$${B}.options; then \
cp fuzz/$${B}.options $(OUT)/$${B}.options; \
fi; \
if test -d fuzz/$(OUTPUT_DIR)/$${B}_seed_corpus; then \
(cd fuzz/$(OUTPUT_DIR)/$${B}_seed_corpus; zip -q -r $(OUT)/$${B}_seed_corpus.zip .); \
elif test -d fuzz/$${B}_seed_corpus; then \
(cd fuzz/$${B}_seed_corpus; zip -q -r $(OUT)/$${B}_seed_corpus.zip .); \
fi; \
done
endif # OSS_FUZZ