tree dcff5e1343b9bd5ee230547464006b3081c91415
parent 692f0719e4cd4387daca51fb3a0151929648aa11
author Lei Zhang <thestig@chromium.org> 1680636987 +0000
committer Pdfium LUCI CQ <pdfium-scoped@luci-project-accounts.iam.gserviceaccount.com> 1680636987 +0000

Do copy-on-write in CPDF_PageContentManager

When CPDF_PageContentManager modifies an object, if the modified object
has multiple references to it, then clone the object and modify the
clone. This fixes issues where modifying an object to edit one page
accidentally modifies multiple pages.

Bug: pdfium:2012
Change-Id: I4b52894ab44889bae0df9415542f018c91436c1a
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/105630
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>