Commit Graph

45 Commits

Author SHA1 Message Date
Artem Dergachev c75b2261a0 [analyzer] Introduce common bug category "Unused code".
This category is generic enough to hold a variety of checkers.
Currently it contains the Dead Stores checker and an alpha unreachable
code checker.

Differential Revision: https://reviews.llvm.org/D98741
2021-03-17 20:58:27 -07:00
Kirstóf Umann bda3dd0d98 [analyzer][NFC] Change LangOptions to CheckerManager in the shouldRegister* functions
Some checkers may not only depend on language options but also analyzer options.
To make this possible this patch changes the parameter of the shouldRegister*
function to CheckerManager to be able to query the analyzer options when
deciding whether the checker should be registered.

Differential Revision: https://reviews.llvm.org/D75271
2020-03-27 14:34:09 +01:00
Kristof Umann fc76d8551f [analyzer][NFC] Refactoring BugReporter.cpp P4.: If it can be const, make it const
When I'm new to a file/codebase, I personally find C++'s strong static type
system to be a great aid. BugReporter.cpp is still painful to read however:
function calls are made with mile long parameter lists, seemingly all of them
taken with a non-const reference/pointer. This patch fixes nothing but this:
make a few things const, and hammer it until it compiles.

Differential Revision: https://reviews.llvm.org/D65382

llvm-svn: 368735
2019-08-13 18:48:08 +00:00
Artem Dergachev 4e53032d9b [CFG] NFC: Remove implicit conversion from CFGTerminator to Stmt *.
Turn it into a variant class instead. This conversion does indeed save some code
but there's a plan to add support for more kinds of terminators that aren't
necessarily based on statements, and with those in mind it becomes more and more
confusing to have CFGTerminators implicitly convertible to a Stmt *.

Differential Revision: https://reviews.llvm.org/D61814

llvm-svn: 361586
2019-05-24 01:34:22 +00:00
Kristof Umann 058a7a450a [analyzer] Supply all checkers with a shouldRegister function
Introduce the boolean ento::shouldRegister##CHECKERNAME(const LangOptions &LO)
function very similarly to ento::register##CHECKERNAME. This will force every
checker to implement this function, but maybe it isn't that bad: I saw a lot of
ObjC or C++ specific checkers that should probably not register themselves based
on some LangOptions (mine too), but they do anyways.

A big benefit of this is that all registry functions now register their checker,
once it is called, registration is guaranteed.

This patch is a part of a greater effort to reinvent checker registration, more
info here: D54438#1315953

Differential Revision: https://reviews.llvm.org/D55424

llvm-svn: 352277
2019-01-26 14:23:08 +00:00
Chandler Carruth 2946cd7010 Update the file headers across all of the LLVM projects in the monorepo
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636
2019-01-19 08:50:56 +00:00
Kristof Umann 76a21502fd [analyzer][NFC] Move CheckerRegistry from the Core directory to Frontend
ClangCheckerRegistry is a very non-obvious, poorly documented, weird concept.
It derives from CheckerRegistry, and is placed in lib/StaticAnalyzer/Frontend,
whereas it's base is located in lib/StaticAnalyzer/Core. It was, from what I can
imagine, used to circumvent the problem that the registry functions of the
checkers are located in the clangStaticAnalyzerCheckers library, but that
library depends on clangStaticAnalyzerCore. However, clangStaticAnalyzerFrontend
depends on both of those libraries.

One can make the observation however, that CheckerRegistry has no place in Core,
it isn't used there at all! The only place where it is used is Frontend, which
is where it ultimately belongs.

This move implies that since
include/clang/StaticAnalyzer/Checkers/ClangCheckers.h only contained a single function:

class CheckerRegistry;

void registerBuiltinCheckers(CheckerRegistry &registry);

it had to re purposed, as CheckerRegistry is no longer available to
clangStaticAnalyzerCheckers. It was renamed to BuiltinCheckerRegistration.h,
which actually describes it a lot better -- it does not contain the registration
functions for checkers, but only those generated by the tblgen files.

Differential Revision: https://reviews.llvm.org/D54436

llvm-svn: 349275
2018-12-15 16:23:51 +00:00
Raphael Isemann b23ccecbb0 Misc typos fixes in ./lib folder
Summary: Found via `codespell -q 3 -I ../clang-whitelist.txt -L uint,importd,crasher,gonna,cant,ue,ons,orign,ned`

Reviewers: teemperor

Reviewed By: teemperor

Subscribers: teemperor, jholewinski, jvesely, nhaehnle, whisperity, jfb, cfe-commits

Differential Revision: https://reviews.llvm.org/D55475

llvm-svn: 348755
2018-12-10 12:37:46 +00:00
Stephen Kelly f2ceec4811 Port getLocStart -> getBeginLoc
Reviewers: teemperor!

Subscribers: jholewinski, whisperity, jfb, cfe-commits

Differential Revision: https://reviews.llvm.org/D50350

llvm-svn: 339385
2018-08-09 21:08:08 +00:00
Nico Weber 758fbacea5 Teach Wreturn-type, Wunreachable-code, and alpha.deadcode.UnreachableCode to treat __assume(0) like __builtin_unreachable.
Fixes PR29134.
https://reviews.llvm.org/D43221

llvm-svn: 325052
2018-02-13 21:31:47 +00:00
Daniel Marjamaki fabe840e75 [StaticAnalyzer] Fix false positives for unreachable code in macros.
Example:

#define MACRO(C)   if (C) { static int x; .. }
void foo() {
	MACRO(0);
}

Differential Revision: https://reviews.llvm.org/D36141

llvm-svn: 309799
2017-08-02 08:26:56 +00:00
Daniel Marjamaki fa1bf447d9 alpha.core.UnreachableCode - don't warn about unreachable code inside macro
In macros, 'do {...} while (0)' is often used. Don't warn about the condition 0 when it is unreachable.

Differential Revision: https://reviews.llvm.org/D25606

llvm-svn: 284477
2016-10-18 13:16:53 +00:00
Daniel Marjamaki 2593b402ce [StaticAnalyzer] Fix false positives for vardecls that are technically unreachable but they are needed.
Example:

    switch (x) {
      int a;  // <- This is unreachable but needed
    case 1:
      a = ...

Differential Revision: https://reviews.llvm.org/D24905

llvm-svn: 282574
2016-09-28 10:39:53 +00:00
Matthias Braun 1d03007774 Avoid overly large SmallPtrSet/SmallSet
These sets perform linear searching in small mode so it is never a good
idea to use SmallSize/N bigger than 32.

Differential Revision: http://reviews.llvm.org/D16705

llvm-svn: 259284
2016-01-30 01:27:06 +00:00
Alexander Kornienko 9c10490efe Refactor: Simplify boolean conditional return statements in lib/StaticAnalyzer/Checkers
Summary: Use clang-tidy to simplify boolean conditional return values

Reviewers: dcoughlin, krememek

Subscribers: krememek, cfe-commits

Patch by Richard Thomson!

Differential Revision: http://reviews.llvm.org/D10021

llvm-svn: 256491
2015-12-28 13:06:58 +00:00
Ted Kremenek 3a0678e33c [analyzer] Apply whitespace cleanups by Honggyu Kim.
llvm-svn: 246978
2015-09-08 03:50:52 +00:00
Alexander Kornienko ab9db51042 Revert r240270 ("Fixed/added namespace ending comments using clang-tidy").
llvm-svn: 240353
2015-06-22 23:07:51 +00:00
Alexander Kornienko 3d9d929e42 Fixed/added namespace ending comments using clang-tidy. NFC
The patch is generated using this command:

  $ tools/extra/clang-tidy/tool/run-clang-tidy.py -fix \
      -checks=-*,llvm-namespace-comment -header-filter='llvm/.*|clang/.*' \
      work/llvm/tools/clang

To reduce churn, not touching namespaces spanning less than 10 lines.

llvm-svn: 240270
2015-06-22 09:47:44 +00:00
Craig Topper 0dbb783c7b [C++11] Use 'nullptr'. StaticAnalyzer edition.
llvm-svn: 209642
2014-05-27 02:45:47 +00:00
Ted Kremenek 4b408e7a04 [analyzer] check for now possibly null predecessor edge.
llvm-svn: 202434
2014-02-27 21:56:41 +00:00
Alexander Kornienko 4aca9b1cd8 Expose the name of the checker producing each diagnostic message.
Summary:
In clang-tidy we'd like to know the name of the checker producing each
diagnostic message. PathDiagnostic has BugType and Category fields, which are
both arbitrary human-readable strings, but we need to know the exact name of the
checker in the form that can be used in the CheckersControlList option to
enable/disable the specific checker.

This patch adds the CheckName field to the CheckerBase class, and sets it in
the CheckerManager::registerChecker() method, which gets them from the
CheckerRegistry.

Checkers that implement multiple checks have to store the names of each check
in the respective registerXXXChecker method.

Reviewers: jordan_rose, krememek

Reviewed By: jordan_rose

CC: cfe-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D2557

llvm-svn: 201186
2014-02-11 21:49:21 +00:00
Aaron Ballman 2ef6a435f4 Fixing a compile error that recently started happening for me in MSVC 2013. CFGTerminator has an explicit conversion to bool operator that we can make use of instead of using == 0.
llvm-svn: 198175
2013-12-29 18:59:54 +00:00
Alp Toker a724cff01b Rename isBuiltinCall() to getBuiltinCallee()
This better describes what the function does.

Cleanup only.

llvm-svn: 198127
2013-12-28 21:59:02 +00:00
Jordan Rose 95cdf9d603 [analyzer] Don't run unreachable code checker on inlined functions.
This is still an alpha checker, but we use it in certain tests to make sure
something is not being executed.

This should fix the buildbots.

llvm-svn: 188682
2013-08-19 17:03:12 +00:00
David Blaikie 00be69ab5c Remove the CFGElement "Invalid" state.
Use Optional<CFG*> where invalid states were needed previously. In the one case
where that's not possible (beginAutomaticObjDtorsInsert) just use a dummy
CFGAutomaticObjDtor.

Thanks for the help from Jordan Rose & discussion/feedback from Ted Kremenek
and Doug Gregor.

Post commit code review feedback on r175796 by Ted Kremenek.

llvm-svn: 175938
2013-02-23 00:29:34 +00:00
David Blaikie 87396b9b08 Replace ProgramPoint llvm::cast support to be well-defined.
See r175462 for another example/more details.

llvm-svn: 175812
2013-02-21 22:23:56 +00:00
David Blaikie 2a01f5d426 Replace CFGElement llvm::cast support to be well-defined.
See r175462 for another example/more details.

llvm-svn: 175796
2013-02-21 20:58:29 +00:00
Chandler Carruth 3a02247dc9 Sort all of Clang's files under 'lib', and fix up the broken headers
uncovered.

This required manually correcting all of the incorrect main-module
headers I could find, and running the new llvm/utils/sort_includes.py
script over the files.

I also manually added quite a few missing headers that were uncovered by
shuffling the order or moving headers up to be main-module-headers.

llvm-svn: 169237
2012-12-04 09:13:33 +00:00
Ted Kremenek 5a10f08b52 Include the "issue context" (e.g. function or method) where a static analyzer issue occurred in the plist output.
Fixes <rdar://problem/11004527>

llvm-svn: 154030
2012-04-04 18:11:35 +00:00
Benjamin Kramer ac19edd2b0 Analyzer: Store BugReports directly in a ilist instead of adding another layer of inderection with std::list
llvm-svn: 153847
2012-04-01 19:30:51 +00:00
Ted Kremenek ef5c554df4 [analyzer] Tweak the UnreachableCode checker to not warning about unreachable default blocks. Patch by Cyril Roelandt!
llvm-svn: 151709
2012-02-29 06:05:28 +00:00
Ted Kremenek 85825aebc9 Further tweak -Wurneachable-code and templates by allowing the warning to run on
explicit template specializations (which represent actual functions somebody wrote).

Along the way, refactor some other code which similarly cares about whether or
not they are looking at a template instantiation.

llvm-svn: 145547
2011-12-01 00:59:17 +00:00
Richard Smith d62306a481 Constant expression evaluation: support for evaluation of structs and unions of
literal types, as well as derived-to-base casts for lvalues and
derived-to-virtual-base casts.

llvm-svn: 144265
2011-11-10 06:34:14 +00:00
Ted Kremenek 81ce1c8a99 Rename AnalysisContext to AnalysisDeclContext. Not only is this name more accurate, but it frees up the name AnalysisContext for other uses.
llvm-svn: 142782
2011-10-24 01:32:45 +00:00
Anna Zaks c29bed3989 [analyzer] Refactor PathDiagnosticLocation: Make PathDiagnosticLocation(SourceLocation...) private. Most of the effort here goes to making BugReport refer to a PathDiagnosticLocation instead of FullSourceLocation.
(Another step closer to the goal of having Diagnostics which can recover from invalid SourceLocations.)

llvm-svn: 140182
2011-09-20 21:38:35 +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
Peter Collingbourne e190dee7a5 Add support for the OpenCL vec_step operator, by generalising and
extending the existing support for sizeof and alignof.  Original
patch by Guy Benyei.

llvm-svn: 127475
2011-03-11 19:24:49 +00:00
Ted Kremenek 96a7a59119 In preparation for fixing PR 6884, rework CFGElement to have getAs<> return pointers instead of fresh CFGElements.
- Also, consoldiate getDtorKind() and getKind() into one "kind".
- Add empty getDestructorDecl() method to CFGImplicitDtor.

llvm-svn: 126738
2011-03-01 03:15:10 +00:00
Argyrios Kyrtzidis 6a5674ffa6 [analyzer] Rename CheckerV2 -> Checker.
llvm-svn: 126726
2011-03-01 01:16:21 +00:00
Argyrios Kyrtzidis bf61d97a98 [analyzer] Migrate UnreachableCodeChecker to CheckerV2.
llvm-svn: 126308
2011-02-23 07:19:23 +00:00
Argyrios Kyrtzidis 507ff53e39 [analyzer] Pass CheckerManager to the registration functions.
llvm-svn: 125777
2011-02-17 21:39:17 +00:00
Argyrios Kyrtzidis 2d3905ffac [analyzer] Use the new registration mechanism on some of the experimental checks. These are:
CStringChecker
   ChrootChecker
   MallocChecker
   PthreadLockChecker
   StreamChecker
   UnreachableCodeChecker

MallocChecker creates implicit dependencies between checkers and needs to be handled differently.

llvm-svn: 125598
2011-02-15 21:25:03 +00:00
Ted Kremenek f8cbac4b91 Split 'include/clang/StaticAnalyzer' into 'include/clang/StaticAnalyzer/Core' and 'include/clang/StaticAnalyzer/Checkers'.
This layout matches lib/StaticAnalyzer, which corresponds to two StaticAnalyzer libraries.

llvm-svn: 125251
2011-02-10 01:03:03 +00:00
Argyrios Kyrtzidis f410a6299f [analyzer] lib/StaticAnalyzer/Checkers/ExprEngineExperimentalChecks.h -> lib/StaticAnalyzer/Checkers/ExperimentalChecks.h
llvm-svn: 125122
2011-02-08 22:30:11 +00:00
Ted Kremenek d99bd55a5e Chris Lattner has strong opinions about directory
layout.  :)

Rename the 'EntoSA' directories to 'StaticAnalyzer'.

Internally we will still use the 'ento' namespace
for the analyzer engine (unless there are further
sabre rattlings...).

llvm-svn: 122514
2010-12-23 19:38:26 +00:00