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JSStackFrame Evisceration: Difference between revisions
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This | This leaves sizeof(JSStackFrame) == 10 words (11 on 32-bit), but we only need to initialize 4 of those words on the common call path; the rest can be lazily (or never) initialized. | ||
=== Members to remove === | === Members to remove === | ||
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| '''Note''' | | '''Note''' | ||
|- | |- | ||
| [https://bugzilla.mozilla.org/show_bug.cgi?id=539144 argc/argv/fun/script/thisv] | | X[https://bugzilla.mozilla.org/show_bug.cgi?id=539144 argc/argv/fun/script/thisv] | ||
| 3 | | 3 | ||
| lw | | lw | ||
| Requires StackSegment [https://bugzilla.mozilla.org/show_bug.cgi?id=579183 changes]. | | Requires StackSegment [https://bugzilla.mozilla.org/show_bug.cgi?id=579183 changes]. | ||
|- | |- | ||
| ncode | | X[https://bugzilla.mozilla.org/show_bug.cgi?id=595073 ncode] | ||
| 3 | | 3 | ||
| | | | ||
| Merge it with savedPC in method-jit. Requires building map HW PC --> bytecode (which we sortof already heave | | Merge it with savedPC in method-jit. Requires building map HW PC --> bytecode (which we sortof already heave | ||
|- | |||
| [https://bugzilla.mozilla.org/show_bug.cgi?id=593882 scopeChain] | |||
| .5 | |||
| | |||
|- | |- | ||
| X[https://bugzilla.mozilla.org/show_bug.cgi?id=577708 displaySave] | | X[https://bugzilla.mozilla.org/show_bug.cgi?id=577708 displaySave] | ||
| Line 29: | Line 33: | ||
| XhookData | | XhookData | ||
| .1 | | .1 | ||
| | | lw | ||
| Lazily initialize using JSStackFrame::flags. Included in bug 539144. | | Lazily initialize using JSStackFrame::flags. Included in bug 539144. | ||
|- | |- | ||
| [https://bugzilla.mozilla.org/show_bug.cgi?id=546848 annotation] | | X[https://bugzilla.mozilla.org/show_bug.cgi?id=546848 annotation] | ||
| 3 | | 3 | ||
| sayrer | | sayrer | ||
| Trivial if we can remove callers in nsScriptSecurityManager. Alas, that is not trivial, so this is going to take a while. | | Trivial if we can remove callers in nsScriptSecurityManager. Alas, that is not trivial, so this is going to take a while. For now, we lazily initialize which gives practically all the benefit. | ||
|- | |- | ||
| [https://bugzilla.mozilla.org/show_bug.cgi?id=540675 callerVersion] | | X[https://bugzilla.mozilla.org/show_bug.cgi?id=540675 callerVersion] | ||
| .5 | | .5 | ||
| cdleary | | cdleary | ||
| Line 44: | Line 48: | ||
| X[https://bugzilla.mozilla.org/show_bug.cgi?id=535912 blockChain] | | X[https://bugzilla.mozilla.org/show_bug.cgi?id=535912 blockChain] | ||
| 1 | | 1 | ||
| | | wmmcloskey | ||
| A bit tricky | | A bit tricky | ||
|- | |- | ||
| [https://bugzilla.mozilla.org/show_bug.cgi?id= | | [https://bugzilla.mozilla.org/show_bug.cgi?id=595073 rval] | ||
| 1 | | 1 | ||
| | | | ||
| | | Lazily initialize with a JSStackFrame::flags bit and avoid ever writing in the hot JM call/return paths. | ||
|- | |- | ||
| imacpc | | X[https://bugzilla.mozilla.org/show_bug.cgi?id=586358 imacpc] | ||
| 1 | | 1 | ||
| cdleary | | cdleary | ||
| Leave uninitialized in call path and use JSStackFrame::flags to indicate whether there is or is not an imacpc. | | Leave uninitialized in call path and use JSStackFrame::flags to indicate whether there is or is not an imacpc. | ||
|} | |} | ||