This would only seem to protect from memory corruption vulnerabilities that are exploited. I don't see how this would protect from the most common vulns: SQLi,

This would only seem to protect from memory corruption vulnerabilities that are exploited. I don't see how this would protect from the most common vulns: SQLi, command injection, crypto implementation weaknesses, OWASP top 10. Would this even protect against sensitive data leakage like the Heartbleed vuln?