From aedae6201b2e328baf557f1417bb5c83615ca640 Mon Sep 17 00:00:00 2001
From: Nathaniel Brough <nathaniel.brough@gmail.com>
Date: Thu, 27 Oct 2022 22:56:31 +0000
Subject: fuzz: Add support for fuzzing

Adds support for fuzzing with basic cdc fuzzer.
---
 fuzz/make.mk | 100 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 fuzz/make.mk

(limited to 'fuzz/make.mk')

diff --git a/fuzz/make.mk b/fuzz/make.mk
new file mode 100644
index 000000000..0921fc8f3
--- /dev/null
+++ b/fuzz/make.mk
@@ -0,0 +1,100 @@
+# ---------------------------------------
+# Common make definition for all examples
+# ---------------------------------------
+
+# Build directory
+BUILD := _build
+PROJECT := $(notdir $(CURDIR))
+
+# Handy check parameter function
+check_defined = \
+    $(strip $(foreach 1,$1, \
+    $(call __check_defined,$1,$(strip $(value 2)))))
+__check_defined = \
+    $(if $(value $1),, \
+    $(error Undefined make flag: $1$(if $2, ($2))))
+
+#-------------- Fuzz harness compiler  ------------
+
+CC ?=  clang
+CXX ?= clang++
+GDB ?= gdb
+OBJCOPY = objcopy
+SIZE = size
+MKDIR = mkdir
+
+ifeq ($(CMDEXE),1)
+  CP = copy
+  RM = del
+  PYTHON = python
+else
+  SED = sed
+  CP = cp
+  RM = rm
+  PYTHON = python3
+endif
+
+#-------------- Source files and compiler flags --------------
+
+
+INC   += $(TOP)/$(FAMILY_PATH)
+
+# Compiler Flags
+CFLAGS += \
+  -ggdb \
+  -fsanitize=fuzzer \
+  -fdata-sections \
+  -ffunction-sections \
+  -fno-strict-aliasing \
+  -Wall \
+  -Wextra \
+  -Werror \
+  -Wfatal-errors \
+  -Wdouble-promotion \
+  -Wstrict-prototypes \
+  -Wstrict-overflow \
+  -Werror-implicit-function-declaration \
+  -Wfloat-equal \
+  -Wundef \
+  -Wshadow \
+  -Wwrite-strings \
+  -Wsign-compare \
+  -Wmissing-format-attribute \
+  -Wunreachable-code \
+  -Wcast-align \
+  -Wcast-qual \
+  -Wnull-dereference \
+  -Wuninitialized \
+  -Wunused \
+  -Wredundant-decls
+
+CFLAGS += \
+  -DOPT_MCU_FUZZ=1 \
+  -DCFG_TUSB_MCU=OPT_MCU_FUZZ 
+
+CXXFLAGS += \
+  -xc++ \
+  -Wno-c++11-narrowing \
+  -fno-implicit-templates
+
+# conversion is too strict for most mcu driver, may be disable sign/int/arith-conversion
+#  -Wconversion
+  
+# Debugging/Optimization
+ifeq ($(DEBUG), 1)
+  CFLAGS += -Og
+else
+  CFLAGS += $(CFLAGS_OPTIMIZED)
+endif
+
+# Log level is mapped to TUSB DEBUG option
+ifneq ($(LOG),)
+  CMAKE_DEFSYM +=	-DLOG=$(LOG)
+  CFLAGS += -DCFG_TUSB_DEBUG=$(LOG)
+endif
+
+# Logger: default is uart, can be set to rtt or swo
+ifneq ($(LOGGER),)
+	CMAKE_DEFSYM +=	-DLOGGER=$(LOGGER)
+endif
+
-- 
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