What java executable is being used when the -vm argument is set to jdk\jre\bin?

I am curious as to which Java executable gets used when eclipse.ini points to the bin directory as opposed to an actual java executable.

Depending on how RTC client is installed there is a different -vm argument in the eclipse.ini file
The IM install eclipse.ini points to
-vm
<absolute path>\jdk\jre\bin\javaw.exe
Task manager shows javaw.exe as the process

The Client for Eclipse zip  file eclipse.ini points to
-vm
\jdk\jre\bin
Task manager shows eclipse.exe as the process