| determineCPU() |   | 20% | | 12% | 16 | 17 | 24 | 28 | 0 | 1 |
| determineOS() | | 25% | | 8% | 6 | 7 | 6 | 9 | 0 | 1 |
| Platform(Platform.OS_TYPE) | | 71% | | 35% | 10 | 11 | 13 | 32 | 0 | 1 |
| determinePlatform(Platform.OS_TYPE) | | 29% | | 17% | 5 | 6 | 5 | 7 | 0 | 1 |
| determineLibC() | | 55% | | 17% | 4 | 5 | 5 | 7 | 0 | 1 |
| windows_p(ThreadContext, IRubyObject) | | 0% | | 0% | 2 | 2 | 1 | 1 | 1 | 1 |
| mac_p(ThreadContext, IRubyObject) | | 0% | | 0% | 2 | 2 | 1 | 1 | 1 | 1 |
| solaris_p(ThreadContext, IRubyObject) | | 0% | | 0% | 2 | 2 | 1 | 1 | 1 | 1 |
| createPlatformModule(Ruby, RubyModule) | | 94% | | 50% | 6 | 7 | 0 | 23 | 0 | 1 |
| mapLibraryName(String) | | 0% | | 0% | 2 | 2 | 3 | 3 | 1 | 1 |
| startsWithIgnoreCase(String, String) | | 62% | | 33% | 3 | 4 | 0 | 3 | 0 | 1 |
| isUnix() | | 0% | | 0% | 2 | 2 | 1 | 1 | 1 | 1 |
| getProperty(String, String) | | 0% | | n/a | 1 | 1 | 3 | 3 | 1 | 1 |
| determineLibExt() | | 54% | | 25% | 3 | 4 | 3 | 5 | 0 | 1 |
| unix_p(ThreadContext, IRubyObject) | | 0% | | n/a | 1 | 1 | 1 | 1 | 1 | 1 |
| bsd_p(ThreadContext, IRubyObject) | | 0% | | n/a | 1 | 1 | 1 | 1 | 1 | 1 |
| static {...} | | 90% | | 50% | 2 | 3 | 0 | 8 | 0 | 1 |
| getJavaMajorVersion() | | 0% | | n/a | 1 | 1 | 1 | 1 | 1 | 1 |
| addressMask() | | 0% | | n/a | 1 | 1 | 1 | 1 | 1 | 1 |
| linux_p(ThreadContext, IRubyObject) | | 83% | | 50% | 1 | 2 | 0 | 1 | 0 | 1 |
| isSupported() | | 96% | | 50% | 5 | 6 | 0 | 1 | 0 | 1 |
| isBSD() | | 96% | | 50% | 4 | 5 | 0 | 1 | 0 | 1 |
| getName() | | 100% | | n/a | 0 | 1 | 0 | 1 | 0 | 1 |
| longSize() | | 100% | | n/a | 0 | 1 | 0 | 1 | 0 | 1 |
| addressSize() | | 100% | | n/a | 0 | 1 | 0 | 1 | 0 | 1 |
| getPlatform() | | 100% | | n/a | 0 | 1 | 0 | 1 | 0 | 1 |
| getOS() | | 100% | | n/a | 0 | 1 | 0 | 1 | 0 | 1 |
| getCPU() | | 100% | | n/a | 0 | 1 | 0 | 1 | 0 | 1 |