Add ARM Thumb-2 support to libunwind
Generating a backtrace on ARM requires executing code. A range of tools such as valgrind, GDB, perf, and the Redhat crash utility all need backtrace support and all currently implement their own heuristics.
ia64 uses libunwind everywhere. Consider the same for ARM, with the first step being to get solid support into libunwind.
Blueprint information
- Status:
- Complete
- Approver:
- Michael Hope
- Priority:
- High
- Drafter:
- Michael Hope
- Direction:
- Needs approval
- Assignee:
- Ken Werner
- Definition:
- Approved
- Series goal:
- Accepted for 11.05
- Implementation:
-
Implemented
- Milestone target:
-
11.05-final
- Started by
- Michael Hope
- Completed by
- Michael Hope
Related branches
Related bugs
Sprints
Whiteboard
michaelh1 spun the demonstrate work out into the 11.11 TR 'Good backtracing'
Estimate: 2-4m
Work Items
Work items:
Add Thumb-2 support: DONE
Add support for when debug symbols are present: DONE
Add parsing of the ARM specific unwind tables: DONE
Add support for local unwinding (generic and local): DONE
Add support for unwinding call stacks with mixed (DWARF and extbl) frames on ARM: DONE
Investigate test suite failures on ARM: DONE
Tidy up the test suite: DONE
Add support for resuming execution from a given cursor: DONE
Dependency tree
* Blueprints in grey have been implemented.
