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authortsepez <tsepez@chromium.org>2016-05-27 17:45:00 -0700
committerCommit bot <commit-bot@chromium.org>2016-05-27 17:45:00 -0700
commit3a005f22703b9303a306bf34cbd17c3729f763aa (patch)
tree9f640eaedbcbdf5b24641f33da1a110241feca82 /fpdfsdk
parent2f109ab836682cb465270ed303d27955db97d98f (diff)
downloadpdfium-3a005f22703b9303a306bf34cbd17c3729f763aa.tar.xz
Workaround dubious casting between CXFA_Object and void* in FXJSE
This is just a crock to get things working until we fix the underlying issue. When there's single-inheritance, it may often work in practice to C-style (reinterpret) cast a Derived* ptr to void* and then back to a Base* ptr. One place where this blows up is if Derived has virtual functions but Base does not, in which case the world will be offset by the size of a vtable ptr. Because of the use of void* types in FXJSE, the above was happening when setting a CXFA_ThisProxy (Derived, virtual) to be a global object (void*). This would then be cast back to a CFXA_Object (Base, non-virtual) and chaos is ensured. Not sure how far back this goes. Along the way, pick up some tidying which was necessary for simplicity while tracking this down. BUG=613607 Review-Url: https://codereview.chromium.org/2015143005
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