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peteruhnak/athens_crash.md

Last active September 29, 2016 08:05
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athens_crash.md

lockSurfaces.st#L68

sourceHandle := interpreterProxy fetchInteger: FormBitsIndex ofObject: sourceForm.

The above returns 0 just before the crash; the surface was NOT GCed however.

sourceForm was retrieved from here loadBitBltFrom.warping..st

sourceForm := interpreterProxy fetchPointer: BBSourceFormIndex ofObject: bitBltOop.

Where bitBltOop is from primitiveCopyBits (rcvr is bitBltOop):

rcvr := interpreterProxy stackValue: interpreterProxy methodArgumentCount.
(self loadBitBltFrom: rcvr)  ifFalse:[^interpreterProxy primitiveFail].

lockSurfaces() was called from copyBits.st

and copyBits() from primitiveCopyBits.st

primitiveCopyBits() is called from image-side (BitBlt>>copyBits)

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