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34 Commits

Author SHA1 Message Date
Ted Kremenek 910e9de131 Renamed ValueManager to BasicValueFactory. 
llvm-svn: 48025
 2008-03-07 20:13:31 +00:00
Gabor Greif 3a8edd8536 fix typos 
llvm-svn: 47995
 2008-03-06 10:40:09 +00:00
Chris Lattner 37e0587839 remove the source location arguments to various target query methods. 
llvm-svn: 47954
 2008-03-05 18:54:05 +00:00
Ted Kremenek e0c79380cd Added checking for undefined results of '<<' and '>>' (shifting by too many bits, etc.) 
This current implementation only works when both operands are concrete values; later we will add support for symbolic values.

llvm-svn: 47726
 2008-02-28 20:32:03 +00:00
Ted Kremenek 93d1fed5ff Renamed "Uninitialized" -> "Undefined" in path-sensitive value tracking engine. 
llvm-svn: 47713
 2008-02-28 09:25:22 +00:00
Ted Kremenek 06b671097d Added lazy "symbolication" of parameter variables and global variables. 
Added recording of divide-by-zero and divide-by-uninitialized nodes.

llvm-svn: 47586
 2008-02-26 02:15:56 +00:00
Ted Kremenek 7f0639b039 Major cleanup of path-sensitive analysis engine and the current analysis 
based on constant. prop. and limited symbolics.

- Renamed class: RValue -> RVal, LValue -> LVal, etc.
- Minor method renamings and interface cleanups.
- Tightened the RVal "type system" so that UninitializedVal and UnknownVal
  cannot be cast to LVal or NonLVal.  This forces these corner cases values
  to be explicitly handled early before being dispatched to plug-in transfer
  function logic.
- Major cleanup in the transfer function logic for binary and unary operators.
  Still fixing some regressions, but we now explicitly handle Uninitialized
  and Unknown values in a more rigorous way.

llvm-svn: 47441
 2008-02-21 18:02:17 +00:00
Ted Kremenek 34e83b80fd Implemented transfer function logic for unary '+' 
llvm-svn: 47357
 2008-02-20 04:12:31 +00:00
Ted Kremenek b597bb9c4a Placed transfer function logic for dereferences in its own method, while at 
the same time clearing up some logic of how the unary '*' operator is processed.

llvm-svn: 47356
 2008-02-20 04:02:35 +00:00
Ted Kremenek e0188e6ad7 Added boilerplate transfer function support for CallExprs. 
llvm-svn: 47298
 2008-02-19 01:44:53 +00:00
Ted Kremenek 074965c5cb Further cleanup. Moved definitions for SymbolManager and ValueManager into 
their own [.cpp;.h] files.

llvm-svn: 47201
 2008-02-16 01:12:31 +00:00
Ted Kremenek e81734b01c Simplified transfer function logic for ++/-- operators. 
Added more boilerplate transfer function support for pointer arithmetic.
Added more pretty-printing support for symbolic constraints.
Added transfer function support for handling enum values.
Minor pointer types cleanup in ExplodedGraphImpl.

llvm-svn: 47183
 2008-02-15 22:09:30 +00:00
Ted Kremenek 8e6f6e05c3 Added "symbol iterators" for RValues, allowing easy iteration over the symbols 
referenced by an RValue, instead of having to query the type of the RValue.

Modified ValueState::RemoveDeadBindings to also prune dead symbols.

llvm-svn: 47142
 2008-02-14 23:25:54 +00:00
Ted Kremenek cf7cf8e8b0 Migrated transfer functions for binary operators for simple value tracking 
from RValues to GRTransferFuncs/GRSimpleVals.

llvm-svn: 47131
 2008-02-14 19:37:24 +00:00
Ted Kremenek 4bad8f7ad6 Migrated transfer functions for unary "~" and "-" to GRTransferFuncs/GRSimpleVals. 
llvm-svn: 47126
 2008-02-14 18:40:24 +00:00
Ted Kremenek 3ca942969e Started partitioning of transfer function logic (and thus the policy behind 
these operations) into GRTransferFuncs and its subclasses.  Originally all
of this logic was handled by the class RValue, but in reality different
analyses will want more flexibility on how they evaluate different values.

Transfer functions migrated so far: "Cast"

llvm-svn: 47125
 2008-02-14 18:28:23 +00:00
Ted Kremenek 747c777bde Moved Rvalues.h from "Analysis/" to "include/clang/Analysis/PathSensitive". 
llvm-svn: 47123
 2008-02-14 17:30:51 +00:00
Ted Kremenek 736e441266 Added transfer function/value track logic for taking the address of a label. 
llvm-svn: 47030
 2008-02-12 21:37:56 +00:00
Ted Kremenek fd39e73b7a Implemented transfer functions for "<<" and ">>" when the RValues are 
ConcreteInts.

llvm-svn: 46883
 2008-02-08 07:14:58 +00:00
Ted Kremenek fd641f1056 More variable renamings. 
llvm-svn: 46875
 2008-02-08 03:02:48 +00:00
Ted Kremenek 173743da67 Renamed InvalidValue to UnknownVal. 
Renamed UninitializedValue to UninitializedVal.

llvm-svn: 46874
 2008-02-08 02:57:34 +00:00
Ted Kremenek e187d0511f Added some more opcode pretty-printing. 
Minor cleanups with generating nodes for NULL-pointer dereferences.

llvm-svn: 46851
 2008-02-07 15:20:13 +00:00
Ted Kremenek e324704e62 Added recording of "implicit" NULL dereferences of symbolic pointers. 
llvm-svn: 46843
 2008-02-07 05:48:01 +00:00
Chris Lattner 6bd4c7f94f get the tree building again 
llvm-svn: 46840
 2008-02-07 05:01:42 +00:00
Ted Kremenek 43523e0fe8 Added transfer function logic for ReturnStmts. 
Fixed insidious bug in handling dereferences.

llvm-svn: 46835
 2008-02-07 01:08:27 +00:00
Ted Kremenek cdd0be1dc1 Major code refactoring/cleanup with transfer function logic. Now the 
code structure is more suitable for additional symbolic analysis.

llvm-svn: 46831
 2008-02-06 22:50:25 +00:00
Ted Kremenek 17b65b557b Added assumption logic for symbolic non-lvalues when used in conditions such as 
"if(x)". On the true branch we know the value is != 0, and on the false branch
we know it is 0.

llvm-svn: 46814
 2008-02-06 17:32:17 +00:00
Ted Kremenek d17f05435a Fixed signedness bug in cast transfer function when casting integers to pointers. 
Removed lval::SymIntConstraintVal; wrappers for symbolic constraints are not lvalues (only integers that evaluate to !0 or 0).

llvm-svn: 46796
 2008-02-06 04:31:33 +00:00
Ted Kremenek 38b32e976c Added pretty-printing support for lval::SymIntConstraintVal and 
nonlval::SymIntConstraintVal.

Reworked transfer function for '==' and '!=' for LValues to return
SymIntConstraintVal when comparing a symbol with a constant.

llvm-svn: 46778
 2008-02-05 23:08:41 +00:00
Ted Kremenek 1e3fa134de Moved subclasses of LValue and NonLValue into their own namespaces. 
This noticeably cleans up the naming of these classes.

llvm-svn: 46770
 2008-02-05 21:52:21 +00:00
Ted Kremenek a4aa95bd9d Added "SymIntConstraint", a utility class to represent intermediate values for 
transfer function evaluation that represent constraints between symbolic values
and constant integers.

llvm-svn: 46769
 2008-02-05 21:32:43 +00:00
Ted Kremenek 2cdfd6670e Implemented transfer function for unary '~'. 
llvm-svn: 46708
 2008-02-04 16:58:30 +00:00
Ted Kremenek effdafa62a Implemented casts for ConcreteInt and ConcreteIntLValue. 
Implemented '==' and '!=' for ConcreteIntLValue.

llvm-svn: 46630
 2008-02-01 06:36:40 +00:00
Ted Kremenek 2838799859 Moved RValue code in GRConstants.cpp to RValue.[h,cpp]. 
Moved ValueKey/ValueMap declaration to ValueState.h.

llvm-svn: 46618
 2008-01-31 19:34:24 +00:00