JavaScript:SpiderMonkey:Context Threading: Difference between revisions
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* Preserving the SpiderMonkey [http://lxr.mozilla.org/mozilla/source/js/src/jsdbgapi.h Debugger API]. | * Preserving the SpiderMonkey [http://lxr.mozilla.org/mozilla/source/js/src/jsdbgapi.h Debugger API]. | ||
* Preserving the [http://lxr.mozilla.org/mozilla/search?string=JS_SetBranchCallback JS_SetBranchCallback API]. | |||
* Recoding [http://lxr.mozilla.org/mozilla/source/js/src/jsopcode.tbl bytecodes] as necessary to improve icache utilization. | * Recoding [http://lxr.mozilla.org/mozilla/source/js/src/jsopcode.tbl bytecodes] as necessary to improve icache utilization. | ||
* Dealing with <code>goto out;</code> and other such jumps in the interpreter. | * Dealing with <code>goto out;</code> and any other such jumps in the interpreter. | ||
[mailto:brendan@mozilla.org /be] | [mailto:brendan@mozilla.org /be] | ||
Revision as of 22:23, 10 January 2006
Context threading is an interpreter implementation technique that aligns the interpreter's virtual PC with the real PC, to optimize branch prediction. SpiderMonkey needs it. Challenges:
- Preserving the SpiderMonkey Debugger API.
- Preserving the JS_SetBranchCallback API.
- Recoding bytecodes as necessary to improve icache utilization.
- Dealing with
goto out;and any other such jumps in the interpreter.