Jordan Rose [Thu, 2 May 2013 01:51:40 +0000 (01:51 +0000)]
[analyzer] RetainCountChecker: don't track through xpc_connection_set_context.
It is unfortunate that we have to mark these exceptions in multiple places.
This was already in CallEvent. I suppose it does let us be more precise
about saying /which/ arguments have their retain counts invalidated -- the
connection's is still valid even though the context object's isn't -- but
we're not tracking the retain count of XPC objects anyway.
Anton Yartsev [Thu, 2 May 2013 00:52:46 +0000 (00:52 +0000)]
[analyzer] scan-build for Windows
The patch allows Windows users to launch scan-build without any additional preparations in the same way as it described in http://clang-analyzer.llvm.org/scan-build.html. The only thing that should be done to make scan-build work from an arbitrary location is to add scan-build folder to the PATH environment variable.
Jordan Rose [Wed, 1 May 2013 23:10:44 +0000 (23:10 +0000)]
[analyzer] Consolidate constant evaluation logic in SValBuilder.
Previously, this was scattered across Environment (literal expressions),
ExprEngine (default arguments), and RegionStore (global constants). The
former special-cased several kinds of simple constant expressions, while
the latter two deferred to the AST's constant evaluator.
Now, these are all unified as SValBuilder::getConstantVal(). To keep
Environment fast, the special cases for simple constant expressions have
been left in, but the main benefits are that (a) unusual constants like
ObjCStringLiterals now work as default arguments and global constant
initializers, and (b) we're not duplicating code between ExprEngine and
RegionStore.
This actually caught a bug in our test suite, which is awesome: we stop
tracking allocated memory if it's passed as an argument along with some
kind of callback, but not if the callback is 0. We were testing this in
a case where the callback parameter had a default value, but that value
was 0. After this change, the analyzer now (correctly) flags that as a
leak!
Jordan Rose [Wed, 1 May 2013 22:39:31 +0000 (22:39 +0000)]
[analyzer] Don't inline the [cd]tors of C++ iterators.
This goes with r178516, which instructed the analyzer not to inline the
constructors and destructors of C++ container classes. This goes a step
further and does the same thing for iterators, so that the analyzer won't
falsely decide we're trying to construct an iterator pointing to a
nonexistent element.
The heuristic for determining whether something is an iterator is the
presence of an 'iterator_category' member. This is controlled under the
same -analyzer-config option as container constructor/destructor inlining:
'c++-container-inlining'.
Chad Rosier [Wed, 1 May 2013 19:50:45 +0000 (19:50 +0000)]
[inline asm] Add a test case for r180873. Test case needs to be on the clang
side because we need an inline asm diagnostics handler in place. Unfortunately,
we emit a .s file because we need to build the SelectionDAG to hit the backend
issue.
rdar://13446483
Richard Smith [Wed, 1 May 2013 19:00:39 +0000 (19:00 +0000)]
PR15884: In the 'taking the address of a temporary' extension, materialize the
temporary to an lvalue before taking its address. This removes a weird special
case from the AST representation, and allows the constant expression evaluator
to deal with it without (broken) hacks.
Jordan Rose [Wed, 1 May 2013 18:19:59 +0000 (18:19 +0000)]
Re-apply "[analyzer] Model casts to bool differently from other numbers."
This doesn't appear to be the cause of the slowdown. I'll have to try a
manual bisect to see if there's really anything there, or if it's just
the bot itself taking on additional load. Meanwhile, this change helps
with correctness.
This changes an assertion and adds a test case, then re-applies r180638,
which was reverted in r180714.
[ObjC declaration documentation] declaration of
types involving Objective-C pointers must have
their arc qualifiers elided as they don't
add any additional info. // rdar://13757500.
Point diagnostics that complain about a use of a selector in an objc message, to the selector location.
Previously it would point to the left bracket or the receiver, which can be particularly
problematic if the receiver is a block literal and we end up point the diagnostic far away
for the selector that is complaining about.
Richard Smith [Tue, 30 Apr 2013 21:34:13 +0000 (21:34 +0000)]
Revert r180739 and r180748: they broke C++11 thread_local on non-Darwin systems and did not do the right thing on Darwin.
Original commit message:
Emit the TLS intialization functions into a list.
Add the TLS initialization functions to a list of initialization functions. The
back-end takes this list and places the function pointers into the correct
section. This way they're called before `main().'
Summary:
Like Itanium, comparisons are basically bitwise comparisons of the two
values, with an exception for null member function pointers. If two
function pointers are null, only the function pointer field matters for
comparison purposes. The rest of the bits can be arbitrary. We take
advantage of this in isZeroInitializable(), and it may matter once we
start emitting conversions.
Richard Smith [Tue, 30 Apr 2013 13:56:41 +0000 (13:56 +0000)]
Don't treat a non-deduced 'auto' type as being type-dependent. Instead, there
are now two distinct canonical 'AutoType's: one is the undeduced 'auto'
placeholder type, and the other is a deduced-but-dependent type. All
deduced-to-a-non-dependent-type cases are still non-canonical.
Rafael Espindola [Tue, 30 Apr 2013 13:08:15 +0000 (13:08 +0000)]
Use {{.*}}suffix instead of [[TC]] in places where we print the toolchain
path with /. This matches linux-ld.c and should finish fixing this test on
windows.
Objective-C (mostly arc): Under ARC, we often have unneeded qualifiers
in the diagnostics. Remove them when reporting incompatible
Objective-C pointer types. // rdar://13752880.
[analyzer] Change PathPieces to be a wrapper around an ilist of (through indirection) PathDiagnosticPieces.
Much of this patch outside of PathDiagnostics.h are just minor
syntactic changes due to the return type for operator* and the like
changing for the iterator, so the real focus should be on
PathPieces itself.
This change is motivated so that we can do efficient insertion
and removal of individual pieces from within a PathPiece, just like
this was a kind of "IR" for static analyzer diagnostics. We
currently implement path transformations by iterating over an
entire PathPiece and making a copy. This isn't very natural for
some algorithms.
We use an ilist here instead of std::list because we want operations
to rip out/insert nodes in place, just like IR manipulation. This
isn't being used yet, but opens the door for more powerful
transformation algorithms on diagnostic paths.
Bill Wendling [Mon, 29 Apr 2013 22:27:16 +0000 (22:27 +0000)]
Emit the TLS intialization functions into a list.
Add the TLS initialization functions to a list of initialization functions. The
back-end takes this list and places the function pointers into the correct
section. This way they're called before `main().'
c language: diagnose use of "[*]" on any array dimension
in the parameter of a function definition. Currently,
it crashes in irgen if it is on other than the 1st dimension.
// rdar://13705391
At one point in time scan-view allowed absolute paths to reference files
within the server root, but this doesn't seem to be used anymore, and
caused problems if a server-root-relative path actually matched an
absolute path to an existing file. This patch just treats paths as
server-root-relative all the time.
Ben Langmuir [Mon, 29 Apr 2013 13:32:41 +0000 (13:32 +0000)]
Small CapturedStmt improvements
Add a CapturedStmt.h similar to Lambda.h to reduce the typing required to get
to the CapturedRegionKind enum. This also allows codegen to access this enum
without including Sema/ScopeInfo.h.
Also removes some duplicated code for capturing 'this' between CapturedStmt and
Lambda.
Richard Smith [Mon, 29 Apr 2013 10:13:55 +0000 (10:13 +0000)]
Implement DR580: access checks for template parameters of a class template are
performed within the context of that class template. Patch by Ismail Pazarbasi!
Richard Smith [Mon, 29 Apr 2013 08:45:27 +0000 (08:45 +0000)]
Fix an assertion failure / accepts-invalid in -fms-extensions mode. Don't build
a dependent-scope id expression when a templated member function of a
non-templated class references an unknown identifier, since instantiation won't
rebuild it (and we can tell at parse time that it'll never work). Based on a
patch by Faisal Vali!
Chad Rosier [Sat, 27 Apr 2013 01:14:43 +0000 (01:14 +0000)]
[driver] Revert r180652 and 180658 and temporarily #define MAXPATHLEN to
make the gdb tests and the Windows bots happy.
The Path::GetCurrentDirectory API is not equivalent to ::getcwd(), so
r180652 causes a gdb tests to fail. On the other hand, <sys/param.h>
isn't defined on Windows systems, so that causes Windows builds to fail.
rdar://12237559
Sean Callanan [Fri, 26 Apr 2013 22:49:25 +0000 (22:49 +0000)]
In the ASTImporter, when checking whether two
structs are compatible, check whether the fields
of the structs have the same name. This prevents
erroneous coalescing of (in particular) anonymous
structs.
Jordan Rose [Fri, 26 Apr 2013 21:43:01 +0000 (21:43 +0000)]
[analyzer] An ObjC for-in loop runs 0 times if the collection is nil.
In an Objective-C for-in loop "for (id element in collection) {}", the loop
will run 0 times if the collection is nil. This is because the for-in loop
is implemented using a protocol method that returns 0 when there are no
elements to iterate, and messages to nil will result in a 0 return value.
At some point we may want to actually model this message send, but for now
we may as well get the nil case correct, and avoid the false positives that
would come with this case.
Jordan Rose [Fri, 26 Apr 2013 21:42:55 +0000 (21:42 +0000)]
[analyzer] Model casts to bool differently from other numbers.
Casts to bool (and _Bool) are equivalent to checks against zero,
not truncations to 1 bit or 8 bits.
This improved reasoning does cause a change in the behavior of the alpha
BoolAssignment checker. Previously, this checker complained about statements
like "bool x = y" if 'y' was known not to be 0 or 1. Now it does not, since
that conversion is well-defined. It's hard to say what the "best" behavior
here is: this conversion is safe, but might be better written as an explicit
comparison against zero.
More usefully, besides improving our model of booleans, this fixes spurious
warnings when returning the address of a local variable cast to bool.
[Modules] Fix an issue where the reconstructed redeclaration chain was incomplete, missing the definition from a module.
-Make sure that a deserialized external decl gets added to the TU scope.
-When associating an identifier with a set of decls, use the most recent local ones,
if they exist, otherwise associating decls from modules (that came after a local one)
will lead to an incomplete reconstructed re-declaration chain.
document parsing. When a sub-class (c++ Objective-C) missing
a comment, grab the first comment found in its class
heirarchy. Also, when a category is mossing a comment,
grab comment of its primary class. // rdar://13647476
Chad Rosier [Fri, 26 Apr 2013 20:49:50 +0000 (20:49 +0000)]
[driver] Implement the -fdebug-compilation-dir in a way that is compatible with
gcc. No test case included as I'm having problems finding a test case where
the inode/dev don't match.
Objective-C: This is a small modification to my
patch -n r180198.
When reporting on missing property accessor implementation in
categories, do not report when they are declared in primary class,
class's protocol, or one of it super classes or in of the other
categories. // rdar://13713098
Rafael Espindola [Thu, 25 Apr 2013 20:12:36 +0000 (20:12 +0000)]
Put friend decls in the correct context.
When we find a friend declaration we have to skip transparent contexts for doing
lookups, but we should not skip them when inserting the new decl if the lookup
found nothing.
projects / clang / log