Commit Graph

13 Commits

Author SHA1 Message Date
Ted Kremenek d9120d3575 Shorten the static analyzer diagnostic for 'use of garbage value'.
llvm-svn: 82672
2009-09-24 00:44:26 +00:00
Ted Kremenek 4f335c300a Have divide-by-zero checker not handled undefined denominators. This is handled by the generic checking for undefined operands for BinaryOperators.
llvm-svn: 82019
2009-09-16 06:04:26 +00:00
Ted Kremenek 7020eae076 Introduce "DefinedOrUnknownSVal" into the SVal class hierarchy, providing a way
to statically type various methods in SValuator/GRState as required either a
defined value or a defined-but-possibly-unknown value. This leads to various
logic cleanups in GRExprEngine, and lets the compiler enforce via type checking
our assumptions about what symbolic values are possibly undefined and what are
not.

Along the way, clean up some of the static analyzer diagnostics regarding the uses of uninitialized values.

llvm-svn: 81579
2009-09-11 22:07:28 +00:00
Ted Kremenek d65d22a0c5 Add uninitialized values test case.
llvm-svn: 80388
2009-08-28 20:25:33 +00:00
Ted Kremenek 1642bdaaa5 Introduce a new concept to the static analyzer: SValuator.
GRTransferFuncs had the conflated role of both constructing SVals (symbolic
expressions) as well as handling checker-specific logic. Now SValuator has the
role of constructing SVals from expressions and GRTransferFuncs just handles
checker-specific logic. The motivation is by separating these two concepts we
will be able to much more easily create richer constraint-generating logic
without coupling it to the main checker transfer function logic.

We now have one implementation of SValuator: SimpleSValuator.

SimpleSValuator is essentially the SVal-related logic that was in GRSimpleVals
(which is removed in this patch). This includes the logic for EvalBinOp,
EvalCast, etc. Because SValuator has a narrower role than the old
GRTransferFuncs, the interfaces are much simpler, and so is the implementation
of SimpleSValuator compared to GRSimpleVals. I also did a line-by-line review of
SVal-related logic in GRSimpleVals and cleaned it up while moving it over to
SimpleSValuator.

As a consequence of removing GRSimpleVals, there is no longer a
'-checker-simple' option. The '-checker-cfref' did everything that option did
but also ran the retain/release checker. Of course a user may not always wish to
run the retain/release checker, nor do we wish core analysis logic buried in the
checker-specific logic. The next step is to refactor the logic in CFRefCount.cpp
to separate out these pieces into the core analysis engine.

llvm-svn: 74229
2009-06-26 00:05:51 +00:00
Daniel Dunbar a45cf5b6b0 Rename clang to clang-cc.
Tests and drivers updated, still need to shuffle dirs.

llvm-svn: 67602
2009-03-24 02:24:46 +00:00
Ted Kremenek b535181199 Static Analyzer driver/options (partial) cleanup:
- Move all analyzer options logic to AnalysisConsumer.cpp.
- Unified specification of stores/constraints/output to be:
   -analyzer-output=...
   -analyzer-store=...
   -analyzer-constraints=...
  instead of -analyzer-range-constraints, -analyzer-store-basic, etc.
- Updated drivers (ccc-analyzer, scan-builds, new ccc) to obey this new
  interface
- Updated test cases to conform to new driver options

llvm-svn: 64737
2009-02-17 04:27:41 +00:00
Nuno Lopes c3a558fd45 enable test as it works
llvm-svn: 63391
2009-01-30 13:01:29 +00:00
Daniel Dunbar 34fc92fdc2 Add -analyze action to run static analyzer, instead of inferring from
individual checker options.

llvm-svn: 62634
2009-01-20 23:17:32 +00:00
Zhongxing Xu af7415ffb1 Lazy bingding for region-store manager.
* Now Bind() methods take and return GRState* because binding could
  also alter GDM.
* No variables are initialized except those declared with initial
  values.
* failed C test cases are due to bugs in RemoveDeadBindings(),
which removes constraints that is still alive. This will be fixed in later
patch.
* default value of array and struct regions will be implemented in later patch.

llvm-svn: 61274
2008-12-20 06:32:12 +00:00
Ted Kremenek 4a3f1efd25 Revise bogus comment I just committed.
llvm-svn: 60522
2008-12-04 02:07:20 +00:00
Ted Kremenek 4cef8c2d58 Add comment to test case for documentation.
llvm-svn: 60521
2008-12-04 02:06:27 +00:00
Zhongxing Xu 06b377668d Split region store specific test cases.
llvm-svn: 59683
2008-11-20 00:46:15 +00:00