3 Commits

Author	SHA1	Message	Date
Jordy Rose	674bd55f02	Add a new symbol type, SymbolExtent, to represent the extents of memory regions that may not be known at compile-time (such as those created by malloc). This replaces the old setExtent/getExtent API on Store, which used the GRState's GDM to store SVals. ... Also adds a getKnownValue() method to SValuator, which gets the integer value of an SVal if it is known to only have one possible value. There are more places in the code that could be using this, but in general we want to be dealing entirely in SVals, so its usefulness is limited. The only visible functionality change is that extents are now honored for any DeclRegion, such as fields and Objective-C ivars, rather than just variables. This shows up in bounds-checking and cast-size-checking. llvm-svn: 107577	2010-07-04 00:00:41 +00:00
Jordy Rose	2dd9b02cc8	Casting to void* or any other pointer-to-sizeless type (e.g. function pointers) causes a divide-by-zero error. Simple fix: check if the pointee type size is 0 and bail out early if it is. ... llvm-svn: 106401	2010-06-20 04:30:57 +00:00
Zhongxing Xu	658dd8b176	CastSizeChecker checks when casting a malloc'ed symbolic region to type T, ... whether the size of the symbolic region is a multiple of the size of T. Fixes PR6123 and PR7217. llvm-svn: 104584	2010-05-25 04:59:19 +00:00