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third/tinygltf/tests/v3/fuzzer/Makefile

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+# tests/v3/fuzzer/Makefile — Build libFuzzer harness for tinygltf v3
+#
+# Requires: clang++ with libFuzzer support
+#
+# Targets:
+#   make             — build fuzzer with ASan + UBSan
+#   make run         — run fuzzer with default settings
+#   make seed        — generate seed corpus from test models
+#   make clean       — remove binaries and corpus
+
+CXX       = clang++
+CXXFLAGS  = -g -O1 -std=c++17 -fno-rtti -fno-exceptions
+SANITIZE  = -fsanitize=fuzzer,address,undefined
+INCLUDES  = -I../../..
+
+FUZZER    = fuzz_gltf_v3
+CORPUS    = corpus
+ARTIFACTS = artifacts
+
+# Fuzzer runtime options
+MAX_LEN   ?= 65536
+JOBS      ?= $(shell nproc 2>/dev/null || echo 4)
+MAX_TIME  ?= 0
+
+.PHONY: all run seed clean
+
+all: $(FUZZER)
+
+$(FUZZER): fuzz_gltf_v3.cc ../../../tiny_gltf_v3.h ../../../tinygltf_json.h
+	$(CXX) $(CXXFLAGS) $(SANITIZE) $(INCLUDES) -o $@ $<
+
+run: $(FUZZER) | $(CORPUS) $(ARTIFACTS)
+	./$(FUZZER) $(CORPUS) \
+		-artifact_prefix=$(ARTIFACTS)/ \
+		-max_len=$(MAX_LEN) \
+		-jobs=$(JOBS) \
+		-workers=$(JOBS) \
+		$(if $(filter-out 0,$(MAX_TIME)),-max_total_time=$(MAX_TIME))
+
+# Generate seed corpus from existing test models
+seed: | $(CORPUS)
+	@echo "Seeding corpus from test models..."
+	@for f in ../../../models/Cube/Cube.gltf \
+	          ../../../models/Cube/Cube.glb; do \
+		if [ -f "$$f" ]; then \
+			cp "$$f" $(CORPUS)/; \
+			echo "  Added: $$f"; \
+		fi; \
+	done
+	@# Add a minimal valid glTF JSON
+	@echo '{"asset":{"version":"2.0"},"scene":0,"scenes":[{"nodes":[0]}],"nodes":[{"name":"n"}]}' > $(CORPUS)/minimal.gltf
+	@# Add a minimal valid GLB (header + empty JSON chunk)
+	@printf 'glTF\x02\x00\x00\x00\x1c\x00\x00\x00\x04\x00\x00\x00JSON{}  ' > $(CORPUS)/minimal.glb
+	@# Add edge cases
+	@echo '{}' > $(CORPUS)/empty_object.gltf
+	@echo '{"asset":{"version":"2.0"}}' > $(CORPUS)/asset_only.gltf
+	@echo "Corpus: $$(ls $(CORPUS) | wc -l) files"
+
+$(CORPUS):
+	mkdir -p $(CORPUS)
+
+$(ARTIFACTS):
+	mkdir -p $(ARTIFACTS)
+
+clean:
+	rm -f $(FUZZER)
+	rm -rf $(CORPUS) $(ARTIFACTS)