C++ Sanitizer Examples

C and C++ project examples that show how to use sanitizer tools

How to use

• Note: These are meant to be examples of showing compiler behavior using sanitizer tools
• Note: Build System requires GNU Make
• Note: No Windows Examples yet
• Examples are sorted by: SanitizerToolName/ExampleName
• Build Example: make
• Run Example: make run
• Build without sanitizer: make nosanbuild
• Run without sanitizer: make nosanrun

Sanitizers used in this project and example calls

ASan == AddressSanitizer

echo C++ clang build example
clang++ -fsanitize=address main.cpp -o main

echo C clang build example
clang -fsanitize=address main.c -o main

LSan == LeakSanitizer

echo C++ clang build example
clang++ -fsanitize=leak main.cpp -o main

echo C clang build example
clang -fsanitize=leak main.c -o main

MSan == MemorySanitizer

echo C++ clang build example
clang++ -fsanitize=memory main.cpp -o main

echo C clang build example
clang -fsanitize=memory main.c -o main

TSan == ThreadSanitizer

echo C++ clang build example
clang++ -fsanitize=thread main.cpp -o main

echo C clang build example
clang -fsanitize=thread main.c -o main

UBSan == UndefinedBehaviorSanitizer

echo C++ clang build example
clang++ -fsanitize=undefined main.cpp -o main

echo C clang build example
clang -fsanitize=undefined main.c -o main

Useful flags when using these sanitizer tools

# Generate complete debug info
-g

# Instructs the compiler to not store stack frame pointers if the function does not need it
-fno-omit-frame-pointer

# Setting Optimization Level
-O0 == Optimization off
-O, -O1 == Low Optimization
-O2 == Medium Optimization
-O3 == High Optimization

# Enable origins tracking in MemorySanitizer
-fsanitize-memory-track-origins=<value>