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Fixes PR15642.
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-fsanitize=use-after-scope mode
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variable in a C99 inline (but not static-inline or extern-inline)
function definition.
The standard doesn't actually say that this doesn't apply to
"extern inline" definitions, but that seems like a useful extension,
and it at least doesn't have the obvious flaw that a static
mutable variable in an externally-available definition does.
rdar://13535367
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to be invalidated
Refactor invalidateRegions to take SVals instead of Regions as input and teach RegionStore
about processing LazyCompoundVal as a top-level “escaping” value.
This addresses several false positives that get triggered by the NewDelete checker, but the
underlying issue is reproducible with other checkers as well (for example, MallocChecker).
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Make sure we do not generate line info for debugging-related frame setup.
Follow-up to r178361 / rdar://problem/12767564
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This is a heuristic to make up for the fact that the analyzer doesn't
model C++ containers very well. One example is modeling that
'std::distance(I, E) == 0' implies 'I == E'. In the future, it would be
nice to model this explicitly, but for now it just results in a lot of
false positives.
The actual heuristic checks if the base type has a member named 'begin' or
'iterator'. If so, we treat the constructors and destructors of that type
as opaque, rather than inlining them.
This is intended to drastically reduce the number of false positives
reported with experimental destructor support turned on. We can tweak the
heuristic in the future, but we'd rather err on the side of false negatives
for now.
<rdar://problem/13497258>
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This is controlled by the 'suppress-c++-stdlib' analyzer-config flag.
It is currently off by default.
This is more suppression than we'd like to do, since obviously there can
be user-caused issues within 'std', but it gives us the option to wield
a large hammer to suppress false positives the user likely can't work
around.
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specifier for an enumeration. Also fix a crash-on-invalid if a non-dependent
name specifier is used to declare an enum template.
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v2:
- Add a test case
v3:
- Use the -### clang option in the tests
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Also add a test for PR15637.
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member inside a class template) when loading a PCH file or module.
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when we actually end a lexical block.
* Added new test for line table / block cleanup.
* Follow-up to r177819 / rdar://problem/13115369
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visible. There's a lot of potential badness in how we're modelling
these things, but getting this much correct is reasonably easy.
rdar://13535367
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Patch by Matthias Kleine!
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The assembly output for Hexagon contains ".string missing_arg".
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functions for the NVPTX target.
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gcc provides -mfprnd and -mno-fprnd for controlling the fprnd target
feature; support these options as well.
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Post-Inc can occur as a binary call (the infamous dummy int argument), but it's
not really a binary operator.
Fixes PR15628.
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Evaluating a C++ new expression now includes generating an intermediate
ExplodedNode, and this node could very well represent a previously-
reachable state in the ExplodedGraph. If so, we can short-circuit the
rest of the evaluation.
Caught by the assertion a few lines later.
<rdar://problem/13510065>
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+ Refactoring.
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MallocChecker.cpp factored out to NewDelete-intersections.mm
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visitor for nil receiver
We can check if the receiver is nil in the node that corresponds to the StmtPoint of the message send.
At that point, the receiver is guaranteed to be live. We will find at least one unreclaimed node due to
my previous commit (look for StmtPoint instead of PostStmt) and the fact that the nil receiver nodes are tagged.
+ a couple of extra tests.
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The array will decay into a pointer, creating an unexpected result.
sizeof(array + int) is an easy to make typo for sizeof(array) + int.
This was motivated by a NetBSD security bug, used sizeof(key - r) instead of
sizeof(key) - r, reducing entropy in a random number generator.
http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/kern/subr_cprng.c.diff?r1=1.14&r2=1.15&only_with_tag=MAIN&f=h
Differential Revision: http://llvm-reviews.chandlerc.com/D571
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* Store the .block_descriptor (instead of self) in the alloca so we
can guarantee that all captured variables are available at -O0.
* Add the missing OpDeref for the alloca.
rdar://problem/12767564
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We already avoided warning for
extern "C" const char *Version_string = "2.9";
now we also don't produce any warnings for
extern "C" {
extern const char *Version_string2 = "2.9";
}
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'isa' ivar is accessed provided it is the first
ivar. Fixit hint will follow in another patch.
This is continuation of // rdar://13503456
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“newed” pointers to escape
Add a new callback that notifies checkers when a const pointer escapes. Currently, this only works
for const pointers passed as a top level parameter into a function. We need to differentiate the const
pointers escape from regular escape since the content pointed by const pointer will not change;
if it’s a file handle, a file cannot be closed; but delete is allowed on const pointers.
This should suppress several false positives reported by the NewDelete checker on llvm codebase.
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participates in the computation of the nil we warn about.
We should only suppress a bug report if the IDCed or null returned nil value is directly related to the value we are warning about. This was
not the case for nil receivers - we would suppress a bug report that had an IDCed nil receiver on the path regardless of how it’s
related to the warning.
1) Thread EnableNullFPSuppression parameter through the visitors to differentiate between tracking the value which
is directly responsible for the bug and other values that visitors are tracking (ex: general tracking of nil receivers).
2) in trackNullOrUndef specifically address the case when a value of the message send is nil due to the receiver being nil.
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This covers a few cases where the class of a member pointer is not a
CXXRecordDecl.
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To do this, thread DiagnosticErrorTrap's hasUnrecoverableErrorOccurred through
to Scope.
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Summary:
This also relaxes the requirement on Windows that the member pointer
class type be a complete type (http://llvm.org/PR12070). We still ask
for a complete type to instantiate any templates (MSVC does this), but
if that fails we continue as normal, relying on any inheritance
attributes on the declaration.
Reviewers: rjmccall
CC: triton, timurrrr, cfe-commits
Differential Revision: http://llvm-reviews.chandlerc.com/D568
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is accessed via accessing 'isa' ivar to use
object_getClass/object_setClass apis.
// rdar://13503456
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The suggestion was already in the text of the note; this just adds the
actual fixit and the appropriate test cases.
Patch by Alexander Zinenko!
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likely be implicitly truncated:
* All forms of Bitwise-and, bitwise-or, and integer multiplication.
* The assignment form of integer addition, subtraction, and exclusive-or
* The RHS of the comma operator
* The LHS of left shifts.
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+ Improved display names for allocators and deallocators
The checker checks if a deallocation function matches allocation one. ('free' for 'malloc', 'delete' for 'new' etc.)
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allocate memory in heap.
+ Improved test coverage for cplusplus.NewDelete checker.
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