Summary

The JVMTI NotifyFramePop should return JVMTI_ERROR_DUPLICATE.

Problem

Now the NotifyFramePop spec is not consistent with the SetBreakpoint spec. SetBreakpoint returns JVMTI_ERROR_DUPLICATE in a case the requested breakpoint was already requested. Also, the JDWP agent already expects the JVMTI_ERROR_DUPLICATE to be returned from NotifyFramePop.

Solution

The JVMTI NotifyFramePop should return JVMTI_ERROR_DUPLICATE.

Specification

The description of the JVMTI NotifyFramePop is updated by adding new error code JVMTI_ERROR_DUPLICATE:

+        <error id="JVMTI_ERROR_DUPLICATE">
+          There is already a frame pop event request at the specified depth.
+        </error>

This is being added for consistency with the SetBreakpoint which already returns the error code JVMTI_ERROR_DUPLICATE. Additionally, the JDWP agent is already expecting/processing this error.