Commit Graph

131 Commits

Author SHA1 Message Date
Richard Trieu a1877598aa Take the non-reference type when constructing a dummy expression.
Otherwise, Expr will assert during construction with a reference type.

llvm-svn: 232425
2015-03-16 21:49:43 +00:00
Benjamin Kramer 66a97ee957 Hide away implementation details of the ThreadSafetyAnalysis in anonymous namespaces
NFC.

llvm-svn: 231653
2015-03-09 14:19:54 +00:00
DeLesley Hutchins 3c355aa24d Thread Safety Analysis: support adopting of locks, as implemented in
std::lock_guard.  If EXCLUSIVE_LOCKS_REQUIRED is placed on the constructor of
a SCOPED_LOCKABLE class, then that constructor is assumed to adopt the lock;
e.g. the lock must be held on construction, and will be released on destruction.

llvm-svn: 228194
2015-02-04 21:16:17 +00:00
DeLesley Hutchins dfa9032f64 Thread Safety Analysis: remove minor piece of unused code. No change in
functionality.

llvm-svn: 228176
2015-02-04 19:28:17 +00:00
DeLesley Hutchins ab1dc2d54d Thread Safety Analysis: add support for before/after annotations on mutexes.
These checks detect potential deadlocks caused by inconsistent lock
ordering.  The checks are implemented under the -Wthread-safety-beta flag.

This patch also replaces calls to getAttrs() with calls to attrs() throughout
ThreadSafety.cpp, which fixes the earlier issue that cause assert failures.

llvm-svn: 228051
2015-02-03 22:11:04 +00:00
Reid Kleckner 6c5e36ae3b Revert "Thread Safety Analysis: add support for before/after annotations on mutexes."
This reverts r227997, as well as r228009. It does not pass check-clang
for me locally on Linux.

llvm-svn: 228020
2015-02-03 19:51:16 +00:00
Reid Kleckner e675575d1b thread safety: Add move ctor to BeforeInfo to fix MSVC build
MSVC cannot infer move ctors yet.

llvm-svn: 228009
2015-02-03 19:04:26 +00:00
DeLesley Hutchins 4980df623f Thread Safety Analysis: add support for before/after annotations on mutexes.
These checks detect potential deadlocks caused by inconsistent lock
ordering.  The checks are implemented under the -Wthread-safety-beta flag.

llvm-svn: 227997
2015-02-03 18:17:48 +00:00
Chandler Carruth 0d9593ddec [cleanup] Re-sort *all* #include lines with llvm/utils/sort_includes.py
Sorry for the noise, I managed to miss a bunch of recent regressions of
include orderings here. This should actually sort all the includes for
Clang. Again, no functionality changed, this is just a mechanical
cleanup that I try to run periodically to keep the #include lines as
regular as possible across the project.

llvm-svn: 225979
2015-01-14 11:29:14 +00:00
DeLesley Hutchins 6d41f38c74 Thread Safety Analysis: move warnings on range-based for loops out of beta
and into -Wthread-safety.

llvm-svn: 221410
2014-11-05 23:09:28 +00:00
DeLesley Hutchins c60dc2cfb9 Thread Safety Analysis: add new warning flag, -Wthread-safety-reference, which
warns when a guarded variable is passed by reference as a function argument.
This is released as a separate warning flag, because it could potentially
break existing code that uses thread safety analysis.

llvm-svn: 218087
2014-09-18 23:02:26 +00:00
Ed Schouten ca98874943 Allow a scoped lockable object to acquire/release multiple locks.
Scoped lockable objects (mutex guards) are implemented as if it is a
lock itself that is acquired upon construction and unlocked upon
destruction. As it if course needs to be used to actually lock down
something else (a mutex), it keeps track of this knowledge through its
underlying mutex field in its FactEntry.

The problem with this approach is that this only allows us to lock down
a single mutex, so extend the code to use a vector of underlying
mutexes. This, however, makes the code a bit more complex than
necessary, so subclass FactEntry into LockableFactEntry and
ScopedLockableFactEntry and move all the logic that differs between
regular locks and scoped lockables into member functions.

llvm-svn: 217016
2014-09-03 06:00:11 +00:00
Aaron Ballman b00885898e Adding const-qualifiers to auto declarations. NFC.
llvm-svn: 215704
2014-08-15 12:29:39 +00:00
DeLesley Hutchins eb0ea5f40a Thread safety analysis: add -Wthread-safety-verbose flag, which adds additional notes that are helpful when compiling statistics on thread safety warnings.
llvm-svn: 215677
2014-08-14 21:40:15 +00:00
DeLesley Hutchins 4133b13bd2 Thread Safety Analysis: fix to improve handling of references to guarded
data members and range based for loops.

llvm-svn: 215671
2014-08-14 19:17:06 +00:00
NAKAMURA Takumi 13a4f76d51 ThreadSafety.cpp: Prune bogus \param(s). [-Wdocumentation]
llvm-svn: 214796
2014-08-04 22:48:46 +00:00
NAKAMURA Takumi e9882cf315 ThreadSafetyAnalysis: Fix annotations in class members. [-Wdocumentation]
llvm-svn: 214795
2014-08-04 22:48:36 +00:00
DeLesley Hutchins 3efd0495a0 Thread Safety Analysis: add a -Wthread-safety-negative flag that warns whenever
a mutex is acquired, but corresponding mutex is not provably not-held.  This
is based on the earlier negative requirements patch.

llvm-svn: 214789
2014-08-04 22:13:06 +00:00
DeLesley Hutchins 4266522ab9 Thread safety analysis: Add support for negative requirements, which are
capability expressions of the form !expr, and denote a capability that must
not be held.

llvm-svn: 214725
2014-08-04 16:10:59 +00:00
DeLesley Hutchins ea1f83385f Thread Safety Analysis: Replace the old and broken SExpr with the new
til::SExpr.  This is a large patch, with many small changes to pretty printing
and expression lowering to make the new SExpr representation equivalent in
functionality to the old.

llvm-svn: 214089
2014-07-28 15:57:27 +00:00
Craig Topper 2554294321 [C++11] Use 'nullptr'. Analysis edition.
llvm-svn: 209191
2014-05-20 04:30:07 +00:00
Aaron Ballman 9ee54d119c Converting some for loops to use range-based for loops. No functional changes intended.
llvm-svn: 208810
2014-05-14 20:42:13 +00:00
Aaron Ballman 59a72b93a2 Amending r208783 based on a suggestion by David Blaikie.
llvm-svn: 208800
2014-05-14 18:32:59 +00:00
Aaron Ballman 42f9a8a7f9 Replacing some manual iterations with standard algorithms. No functional changes intended.
llvm-svn: 208783
2014-05-14 15:01:43 +00:00
Aaron Ballman 2f3fc6badd Formatting and style changes; no functional changes intended.
llvm-svn: 208774
2014-05-14 13:03:55 +00:00
Aaron Ballman 0c6a14ca82 Amending r208439 to remove buildLExpr; this code isn't strictly required yet, and fixes a dead code warning.
llvm-svn: 208440
2014-05-09 18:44:48 +00:00
Aaron Ballman 7c192b452f Add the ability to use logical expressions for capability attributes. This is to allow requirements to be expressed not just in terms of lists, but in terms of logical expressions. Eg)
void foo(void) __attribute__((requires_capability((FlightControl || Worker) && !Logger)));

This is WIP code.

llvm-svn: 208439
2014-05-09 18:26:23 +00:00
Nico Weber b0f9e4ace7 Remove unused typedef found by gcc's -Wunused-local-typedefs.
llvm-svn: 207870
2014-05-02 21:22:21 +00:00
Aaron Ballman a82eaa70f1 Updated the attribute tablegen emitter for variadic arguments to emit a range accessor in addition to the iterators. Updated code using iterators to use range-based for loops.
llvm-svn: 207837
2014-05-02 13:35:42 +00:00
Aaron Ballman 0491afaf5f Updating to use more range-based for loops, nullptr and auto. No functional changes.
llvm-svn: 206590
2014-04-18 13:13:15 +00:00
Aaron Ballman e80bfcd048 Making some public members into private members. This also introduces a bit more const-correctness, and now uses some range-based for loops. No functional changes intended.
llvm-svn: 206503
2014-04-17 21:44:08 +00:00
DeLesley Hutchins 7e615c2f65 Thread Safety Analysis: reorganized SExpr header files. No change in
functionality.

llvm-svn: 205936
2014-04-09 22:39:43 +00:00
DeLesley Hutchins b2213910de Thread Safety Analysis: update to internal SExpr handling.
This patch is the first part of a significant refactoring that seeks to restore
sanity to way thread safety analysis deals with capability expressions.  The
current patch merely provides an outline of the structure of the new system.
It's not yet connected to the actual analysis, so there's no change in
functionality.

llvm-svn: 205728
2014-04-07 18:09:54 +00:00
Aaron Ballman e044904301 Updating the capability attribute diagnostics to be more capability-neutral. Instead of using terminology such as "lock", "unlock" and "locked", the new terminology is "acquire", "release" and "held". Additionally, the capability attribute's name argument is now reported as part of the diagnostic, instead of hard coding as "mutex."
llvm-svn: 205359
2014-04-01 21:43:23 +00:00
Aaron Ballman df115d9bf3 The release_capability, release_shared_capability and release_generic_capability functions are now functionally distinct for capability analysis. The unlock_function attribute maps directly to release_generic_capability.
llvm-svn: 204469
2014-03-21 14:48:48 +00:00
Aaron Ballman 18d85aed39 Replacing the exclusive_lock_function, shared_lock_function and unlock_function attributes with the acquire_capability and release_capability attributes. The old spellings will continue to work, but the underlying semantic attributes have been replaced.
Downgraded the capability diagnostics from error to warning to match the desired behavior, and updated the existing test cases.

llvm-svn: 204350
2014-03-20 16:02:49 +00:00
DeLesley Hutchins d1c9b37db9 Thread safety analysis: move smart pointer checks from -Wthread-safety-beta
to -Wthread-safety.

llvm-svn: 203510
2014-03-10 23:03:49 +00:00
Aaron Ballman be22bcb180 [C++11] Replacing DeclBase iterators specific_attr_begin() and specific_attr_end() with iterator_range specific_attrs(). Updating all of the usages of the iterators with range-based for loops.
llvm-svn: 203474
2014-03-10 17:08:28 +00:00
Aaron Ballman 69bb592ad1 Based on usage, the NamedDecl is always set when constructing a CallingContext, but none of the other optional parameters are. Removing the optional parameters, and making the NamedDecl required.
No functional changes intended.

llvm-svn: 203149
2014-03-06 19:37:24 +00:00
Aaron Ballman 19842c437a Refactored to use a simple helper function that wraps the logic of creating an SExprNode and returning the position in which it was inserted.
No functional change intended.

llvm-svn: 203148
2014-03-06 19:25:11 +00:00
Aaron Ballman cea2609b59 Very minor simplification and typo correction; no functional changes intended.
llvm-svn: 203144
2014-03-06 19:10:16 +00:00
Aaron Ballman efe348ec44 DeLesley Hutchins (who wrote the original thread-safety attribute functionality) and I have agreed to start migrating from lock-specific terminology to "capability"-specific terminology. This opens the door for future threading-related analysis passes so that a common nomenclature can be used.
The following attributes have been (silently) deprecated, with their replacements listed:

lockable => capability
exclusive_locks_required => requires_capability
shared_locks_required => requires_shared_capability
locks_excluded => requires_capability

There are no functional changes intended.

llvm-svn: 201585
2014-02-18 17:36:50 +00:00
Aaron Ballman ee58e6d6d2 Switching getAttrs calls over to using a specific_attr_iterator. No functional changes intended.
llvm-svn: 197681
2013-12-19 15:35:31 +00:00
Aaron Ballman 9ead1243a5 Replacing calls to getAttr with calls to hasAttr for clarity. No functional change intended -- this only replaces Boolean uses of getAttr.
llvm-svn: 197648
2013-12-19 02:39:40 +00:00
Alp Toker f6a24ce40f Fix a tranche of comment, test and doc typos
llvm-svn: 196510
2013-12-05 16:25:25 +00:00
Alp Toker d473363876 Correct hyphenations in comments and assert messages
This patch tries to avoid unrelated changes other than fixing a few
hyphen-related ambiguities in nearby lines.

llvm-svn: 196466
2013-12-05 04:47:09 +00:00
DeLesley Hutchins 39b804f8a4 Thread safety analysis: fix ICE due to missing null check on dyn_cast.
llvm-svn: 195777
2013-11-26 19:45:21 +00:00
DeLesley Hutchins e73d6b605c Thread-safety analysis: check guarded_by and pt_guarded_by on array access.
Currently supported only with -Wthread-safety-beta.

llvm-svn: 194275
2013-11-08 19:42:01 +00:00
DeLesley Hutchins 05b7b37021 Thread safety analysis: minor bugfix to smart pointer handling, and expanded
test case.

llvm-svn: 194157
2013-11-06 18:40:01 +00:00
DeLesley Hutchins 5ede5cc9ba Thread safety analysis: check pt_guarded_by attribute when calling -> and *
on smart pointers.  -Wthread-safety-beta only.

llvm-svn: 194103
2013-11-05 23:09:56 +00:00