CFStringRef#stringValue fails if string consists entirely of 3-byte UTF characters

[caifenglin]

version:<oshi.version>5.7.1</oshi.version>
java.lang.IllegalArgumentException: CFString conversion fails or the provided buffer is too small.
at com.sun.jna.platform.mac.CoreFoundation$CFStringRef.stringValue(CoreFoundation.java:502)

[dbwiddis]

This error occurs in JNA. I need more context to determine what the problem may be.

The code is here:

https://github.com/java-native-access/jna/blob/master/contrib/platform/src/com/sun/jna/platform/mac/CoreFoundation.java#L490-L502

It gets the character length of the string using CFStringGetLength();
It gets the max length in bytes that could possibly fit using UTF8 encoding;
It allocates a buffer of that size and fetches the string.

Possible problems:

• The data is in a format other than UTF8 (?)
• The length of the string changes during method execution

[dbwiddis]

Looks like this can happen if the string consists completely of 3-byte unicode characters. I'll fix this upstream java-native-access/jna#1342