如何使用 JNA 处理 Fortran RTL 错误？

Question

I'm running a shared library (compiled with Intel) using JNA. In rare cases the Fortran-call ends with a forrtl: severe code. Something like

forrtl: severe (408): fort: (3): Subscript #1 of the array IWU has value 0 which is less than the lower bound of 1

Is there a way to "catch" this runtime error using JNA?

Answer 1

There is no general mechanism for passing error codes from native code to JNA. At best, JNA will know the function failed from its return value.

However, if the native code provides a means of reading those error codes (eg, the Windows GetLastError() function, or the global errno variable on Linux and macOS), then more specific details can be retrieved.

For an Intel Fortran "severe" error, program execution stops unless it's handled on the native side, so I don't think there's anything you can do to "catch" it in JNA unless it's already "caught" in the library you're using... in which case, you just need to properly react to the failed method call. The Fortran source can be modified to catch some runtime errors (such as in I/O , dynamic memory management or image control) and return this status. However, for this particular array bounds error of the question, this may not apply.