C and C++ are widely used languages for critical software development, particularly in Japan's manufacturing and industrial sectors. However, these languages lack built-in safety features, making them prone to vulnerabilities like buffer overflows, use-after-free, and memory leaks. Valgrind is a powerful tool for finding memory leaks, but it requires compiling the program first. Snyk Code is a static code analysis tool that applies machine learning techniques to identify security vulnerabilities in C code without requiring compilation or build steps. It can detect more vulnerability types than just malloc memory leaks and helps developers ensure code security in C and C++, which is crucial for maintaining high standards in critical software development.