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10 Commits

Author SHA1 Message Date
Ted Kremenek 3f955e6d89 [analyzer] rename all experimental checker packages to have 'experimental' be the common root package. 
llvm-svn: 136835
 2011-08-03 23:14:55 +00:00
Ted Kremenek e9fda1e48a [analyzer] Overhaul how the static analyzer expects CFGs by forcing CFGs to be linearized only when used by the static analyzer. This required a rewrite of LiveVariables, and exposed a ton of subtle bugs. 
The motivation of this large change is to drastically simplify the logic in ExprEngine going forward.

Some fallout is that the output of some BugReporterVisitors is not as accurate as before; those will
need to be fixed over time.  There is also some possible performance regression as RemoveDeadBindings
will be called frequently; this can also be improved over time.

llvm-svn: 136419
 2011-07-28 23:07:59 +00:00
Ted Kremenek f230198f15 Tighen analyzer diagnostics w.r.t ObjC/CF leaks. 
llvm-svn: 132130
 2011-05-26 18:45:44 +00:00
Argyrios Kyrtzidis 9eb02dfa89 [analyzer] Remove '-analyzer-check-objc-mem' flag, the nominee for best misnomer award. 
llvm-svn: 126676
 2011-02-28 19:49:42 +00:00
Argyrios Kyrtzidis 2c49ec7f1d [analyzer] Migrate NSErrorChecker and DereferenceChecker to CheckerV2. 
They cooperate in that NSErrorChecker listens for ImplicitNullDerefEvent events that
DereferenceChecker can dispatch.
ImplicitNullDerefEvent is when we dereferenced a location that may be null.

llvm-svn: 126659
 2011-02-28 17:36:18 +00:00
Argyrios Kyrtzidis b388f77ad9 [analyzer] Remove '-analyzer-experimental-internal-checks' flag, it doesn't have any checkers associated with it anymore. 
llvm-svn: 126440
 2011-02-24 21:43:08 +00:00
Ted Kremenek 731310e13e Tweak null dereference checker to give better diagnostics for null dereferences resulting from array accesses. 
llvm-svn: 117334
 2010-10-26 00:06:13 +00:00
Ted Kremenek 4f63ac7057 Tweak retain/release checker diagnostics to specify a leak occurs because an object is not referenced later in the path, 
not that it isn't referenced later in the code.  Fixes <rdar://problem/8527839>.

llvm-svn: 116636
 2010-10-15 22:50:23 +00:00
Ted Kremenek ff3a4ff6e9 Use FindReportInEquivalenceClass to identify all the nodes used for the trimmed graph (in BugReporter). This fixes a problem where a leak that happened to occur on both an exit() path and a non-exit() path was getting reported with the exit() path (which users don't care about). 
This fixes:

<rdar://problem/8331641> leak reports should not show paths that end with exit() (but ones that don't end with exit())

llvm-svn: 113524
 2010-09-09 19:05:34 +00:00
Ted Kremenek 5f256da834 Rename GRState::getSVal() -> getRawSVal() and getSimplifiedSVal() -> getSVal(). 
The end result is now we eagarly constant-fold symbols in the analyzer that are perfectly constrained
to be a constant value.  This allows us to recover some path-sensitivity in some cases by lowering
the required level of reasoning power needed to evaluate some expressions.

The net win from this change is that the false positive in PR 8015 is fixed, and we also
find more idempotent operations bugs.

We do, however, regress with the BugReporterVisitors, which need to be modified to understand
this constant folding (and look past it).  This causes some diagnostic regressions in plist-output.m
which will get addressed in a future patch.  plist-output.m is now marked XFAIL, while
plist-output-alternate.m now tests that the plist output is working, but with the suboptimal
diagnostics.  This second test file will eventually be removed.

llvm-svn: 113477
 2010-09-09 07:13:00 +00:00