Dynamic instrumentation via user-level mechanisms
US11868781B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 24, 2022 |
| Grant date | Jan 9, 2024 |
| Priority date | — |
| Expiry date | Mar 24, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/865
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a method includes accessing a loaded but paused source process executable and disassembling the source process executable to identify a system call to be instrumented and an adjacent relocatable instruction. Instrumenting the system call includes building a trampoline for the system call that includes a check flag instruction at or near an entry point to the trampoline and two areas of the trampoline that are selectively executed according to results of the check flag instruction. Building a first area of the trampoline includes providing instructions to execute a relocated copy of the adjacent relocatable instruction and return flow to an address immediately following the adjacent relocatable instruction. Building a second area of the trampoline includes providing instructions to invoke at least one handler associated with executing a relocated copy of the system call and return flow to an address immediately following the system call.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.