US 8,752,008 B2 · Lightweight service based dynamic binary rewriter framework

Abstract

A sampling based DBR framework which leverages a separate core for program analysis. The framework includes a hardware performance monitor, a DBR service that executes as a separate process and a lightweight DBR agent that executes within a client process. The DBR service aggregates samples from the hardware performance monitor, performs region selection by deducing the program structure around hot samples, performs transformations on the selected regions (e.g. optimization), and generates replacement code. The DBR agent then patches the client process to use the replacement code.

Claims20

Dependent claims

A dynamic binary rewriter (DBR) framework comprising:

a hardware performance monitor contained within a processor, the hardware performance monitor sampling one or more client processes;
a DBR service, the DBR service executing as a separate process, the DBR service configured to:
aggregate samples from the hardware performance monitor;
perform region selection to identify a frequently executed code section in the one or more client processes;
optimize the selected region;
and
generate replacement code for the selected region, wherein the replacement code is functionally equivalent to original code of the selected region;
and
a DBR agent, the DBR agent executing within the one or more client processes, the DBR agent patching the one or more client processes to use the replacement code.

6 more elements

Dependencies are inferred from the claim text.

Lightweight service based dynamic binary rewriter framework

Life of this patent

Lightweight service based dynamic binary rewriter framework

Life of this patent

Abstract

Claims20