Closed Bug 904881 Opened 11 years ago Closed 11 years ago

Add stack unwinding through JS JIT code to SPS and perf_events on B2G

Categories

(Firefox OS Graveyard :: Performance, defect, P4)

Product:
Firefox OS Graveyard
Component:
Performance
Platform:
ARM
Gonk (Firefox OS)
Type:
defect

Tracking

(Not tracked)

Status:
RESOLVED DUPLICATE of bug 914561
Milestone:
2.0 S2 (23may)

People

(Reporter: huseby, Unassigned)

References

Details

(Keywords: perf, Whiteboard: [c=profiling p= s=2014.05.23 u=]) 

Add support for this to the stack unwinding code on B2G:

We push a pseudoframe entry called js::RunScript before entering JS. We can modify that pseudoframe to contain all the data to unwind from that point. We can use these frames to resume the unwinding. Thus the stack would look like this:

XRE_Main                         --- done
...                               |
event loop                        |
run event                         |
...                               |
JS::RunScript    (Saved Context) Resume unwind from context
JITFrame         (Can't unwind)  Recover all
JITFrame         (Can't unwind)  JIT frames via
JITFrame         (Can't unwind)  Pseudoframes
JITFrame         (Can't unwind)  --- 
VMCall                            |
JS_GetData                        |
PR_Now                          Unwind
Depends on: 904894
Keywords: perf
Whiteboard: [c=profiling s=2013.09.20 p=4] → [c=profiling p=4 s= u=]
Assignee: dhuseby → nobody
Do we still need to take action on this one?
Component: General → Performance
Flags: needinfo?(dhuseby)
Priority: -- → P4
I think we can close this as a duplicate of bug 914561, at this point.
closing then.
Status: ASSIGNED → RESOLVED
Closed: 11 years ago
Flags: needinfo?(dhuseby)
Resolution: --- → DUPLICATE
Whiteboard: [c=profiling p=4 s= u=] → [c=profiling p= s=2014.05.23 u=]
Target Milestone: --- → 2.0 S2 (23may)
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