JSStackFrame Evisceration: Difference between revisions

Revision as of 21:07, 29 July 2010

This would leave sizeof(JSStackFrame) == 6 words.

Sorted in estimated order of benefit / difficulty:

Task	Size (wks)	Assignee	Note
argc/argv	1.5	lw	Requires CallSegment (CallStack) changes, educate decompiler
thisv	.5	lw	Depends on argv/argc
fun, script	.5	lw	Depends on thisv
ncode	3	dvander	Merge it with savedPC in method-jit. Requires building map HW PC --> bytecode (which we sortof already heave
XdisplaySave	1	cdleary	Remove display optimization for great justice!
hookData	.2	lw	Just use js::Invoke and use a local variable
annotation	3	sayrer	Trivial if we can remove callers in nsScriptSecurityManager. Alas, that is not trivial, so this is going to take a while.
callerVersion	.5		Mostly the challenge is just understanding the actual use case.
blockChain	1	lw	A bit tricky
rval	1		Tricky
imacpc	1		Leave uninitialized in call path and use JSStackFrame::flags to indicate whether there is or is not an imacpc.

@@ Line 28: / Line 28: @@
 |-
 | ncode
-| .1
+| 3
 | dvander
-| Merge it with savedPC in method-jit
+| Merge it with savedPC in method-jit.  Requires building map HW PC --> bytecode (which we sortof already heave
 |-
 | X[https://bugzilla.mozilla.org/show_bug.cgi?id=577708 displaySave]
@@ Line 65: / Line 65: @@
 | 1
 |
-| Perhaps push on the expression stack like JSOP_GOSUB does
+| Leave uninitialized in call path and use JSStackFrame::flags to indicate whether there is or is not an imacpc.
 |}