JVM Interpreter (original) (raw)

mr rupplin mearvk at outlook.com
Sat Aug 25 18:39:02 UTC 2018

I am presuming the JVM interpreter is defined/implemented in the the hotspot module since this is a JVM implementation.

I cannot seem to find any instruction in it that gets called by a simple "./java -ea Class" call. We are stumped.

For instance there are methods for local set and reference:

void BytecodeInterpreter::set_stack_slot(intptr_t *tos, address value, int offset) {

*((address *)&tos[Interpreter::expr_index_at(-offset)]) = value;

}

void BytecodeInterpreter::set_stack_object(intptr_t *tos, oop value, int offset) {

*((oop *)&tos[Interpreter::expr_index_at(-offset)]) = value; }

These (and similar in same file) are not being called at all during the JVM interpreter phase (simple java program as reference). My program creates an object and calls a test method with a single object as reference.

What could be the hang up? No printf statement seems to work.

Thanks.

Max Rupplin

Software Engineer

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