tree b9001f01007f20171c178201bb4b0dcf41da49cb
parent c388093a05fa250e588ae0a4ba0b6ccab65486d9
author Daniel Hosseinian <dhoss@chromium.org> 1582791047 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1582791047 +0000

Space-efficiently destroy chained CXFA_FMSimpleExpression instances

Destroy CXFA_FMChainableExpression objects iteratively in linear time
and constant space.

Currently, chainable CXFA_FMSimpleExpression objects are destroyed
recursively, allowing the stack to overflow if the chain is long
enough. This change allows for efficient destruction without the need
to lower the FM2JS parser depth limit.

Fixed: chromium:1052724
Change-Id: I44753693910230d961c8d4ea9aeb7a6305f9d1e5
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/66990
Commit-Queue: Daniel Hosseinian <dhoss@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>