Mapping Exceptions to High-Level Source Code on a Heterogeneous Architecture

Network packet processing architectures use heterogeneous processors as accelerators to speed-up classic application domain tasks. Our platform compiles applications to bytecodes for a generalized packet processing machine, then uses microcoded interpreters running in parallel to trigger accelerators as needed. To make the system effective requires helping users debug apps, which includes tracking runtime exceptions. Exception tracking is complicated when a system-thrown exception is detected on an accelerator and the current binary form is far removed from the original high-level language source or associated assembly code. We tackle this problem by (1) instrumenting the compiler and a low-level bytecode tool, (2) reporting exceptions with the interpreter, (3) creating a specialized tool to collate the higher-level program forms with the lower-level bytecode forms. This functionality provides data needed for post-mortem program analysis.