Summary: The new way of checking fix-its is `%check_analyzer_fixit`.
Reviewed By: NoQ, Szelethus, xazax.hun
Differential Revision: https://reviews.llvm.org/D73729
Summary:
This patch introduces a way to apply the fix-its by the Analyzer:
`-analyzer-config apply-fixits=true`.
The fix-its should be testable, therefore I have copied the well-tested
`check_clang_tidy.py` script. The idea is that the Analyzer's workflow
is different so it would be very difficult to use only one script for
both Tidy and the Analyzer, the script would diverge a lot.
Example test: `// RUN: %check-analyzer-fixit %s %t -analyzer-checker=core`
When the copy-paste happened the original authors were:
@alexfh, @zinovy.nis, @JonasToth, @hokein, @gribozavr, @lebedev.ri
Reviewed By: NoQ, alexfh, zinovy.nis
Differential Revision: https://reviews.llvm.org/D69746
Summary:
This patch hooks the `Preprocessor` trough `BugReporter` to the
`CheckerContext` so the checkers could look for macro definitions.
Reviewed By: NoQ
Differential Revision: https://reviews.llvm.org/D69731
This is how it should've been and brings it more in line with
std::string_view. There should be no functional change here.
This is mostly mechanical from a custom clang-tidy check, with a lot of
manual fixups. It uncovers a lot of minor inefficiencies.
This doesn't actually modify StringRef yet, I'll do that in a follow-up.
AbstractBasicReader.h has quite a few dependencies already,
and that's only likely to increase. Meanwhile, ASTRecordReader
is really an implementation detail of the ASTReader that is only
used in a small number of places.
I've kept it in a public header for the use of projects like Swift
that might want to plug in to Clang's serialization framework.
I've also moved OMPClauseReader into an implementation file,
although it can't be made private because of friendship.
This commit sets the Self and Imp declarations for ObjC method declarations,
in addition to the definitions. It also fixes
a bunch of code in clang that had wrong assumptions about when getSelfDecl() would be set:
- CGDebugInfo::getObjCMethodName and AnalysisConsumer::getFunctionName would assume that it was
set for method declarations part of a protocol, which they never were,
and that self would be a Class type, which it isn't as it is id for a protocol.
Also use the Canonical Decl to index the set of Direct methods so that
when calls and implementations interleave, the same llvm::Function is
used and the same symbol name emitted.
Radar-Id: rdar://problem/57661767
Patch by: Pierre Habouzit
Differential Revision: https://reviews.llvm.org/D71091
Traditionally, clang-tidy uses the term check, and the analyzer uses checker,
but in the very early years, this wasn't the case, and code originating from the
early 2010's still incorrectly refer to checkers as checks.
This patch attempts to hunt down most of these, aiming to refer to checkers as
checkers, but preserve references to callback functions (like checkPreCall) as
checks.
Differential Revision: https://reviews.llvm.org/D67140
llvm-svn: 371760
At this point the PathDiagnostic, PathDiagnosticLocation, PathDiagnosticPiece
structures no longer rely on anything specific to Static Analyzer, so we can
move them out of it for everybody to use.
PathDiagnosticConsumers are still to be handed off.
Differential Revision: https://reviews.llvm.org/D67419
llvm-svn: 371661
Allow attaching fixit hints to Static Analyzer BugReports.
Fixits are attached either to the bug report itself or to its notes
(path-sensitive event notes or path-insensitive extra notes).
Add support for fixits in text output (including the default text output that
goes without notes, as long as the fixit "belongs" to the warning).
Add support for fixits in the plist output mode.
Implement a fixit for the path-insensitive DeadStores checker. Only dead
initialization warning is currently covered.
Implement a fixit for the path-sensitive VirtualCall checker when the virtual
method is not pure virtual (in this case the "fix" is to suppress the warning
by qualifying the call).
Both fixits are under an off-by-default flag for now, because they
require more careful testing.
Differential Revision: https://reviews.llvm.org/D65182
llvm-svn: 371257
Summary:
This patch introduces a new `analyzer-config` configuration:
`-analyzer-config silence-checkers`
which could be used to silence the given checkers.
It accepts a semicolon separated list, packed into quotation marks, e.g:
`-analyzer-config silence-checkers="core.DivideZero;core.NullDereference"`
It could be used to "disable" core checkers, so they model the analysis as
before, just if some of them are too noisy it prevents to emit reports.
This patch also adds support for that new option to the scan-build.
Passing the option `-disable-checker core.DivideZero` to the scan-build
will be transferred to `-analyzer-config silence-checkers=core.DivideZero`.
Reviewed By: NoQ, Szelethus
Differential Revision: https://reviews.llvm.org/D66042
llvm-svn: 369078
This is more of a temporary fix, long term, we should convert AnalyzerOptions.def
into the universally beloved (*coughs*) TableGen format, where they can more
easily be separated into developer-only, alpha, and user-facing configs.
Differential Revision: https://reviews.llvm.org/D66261
llvm-svn: 368980
Now that we've moved to C++14, we no longer need the llvm::make_unique
implementation from STLExtras.h. This patch is a mechanical replacement
of (hopefully) all the llvm::make_unique instances across the monorepo.
Differential revision: https://reviews.llvm.org/D66259
llvm-svn: 368942
This patch is a prerequisite for using LangStandard from Driver in
https://reviews.llvm.org/D64793.
It moves LangStandard* and InputKind::Language to Basic. It is mostly
mechanical, with only a few changes of note:
- enum Language has been changed into enum class Language : uint8_t to
avoid a clash between OpenCL in enum Language and OpenCL in enum
LangFeatures and not to increase the size of class InputKind.
- Now that getLangStandardForName, which is currently unused, also checks
both canonical and alias names, I've introduced a helper getLangKind
which factors out a code pattern already used 3 times.
The patch has been tested on x86_64-pc-solaris2.11, sparcv9-sun-solaris2.11,
and x86_64-pc-linux-gnu.
There's a companion patch for lldb which uses LangStandard.h
(https://reviews.llvm.org/D65717).
While polly includes isl which in turn uses InputKind::C, that part of the
code isn't even built inside the llvm tree. I've posted a patch to allow
for both InputKind::C and Language::C upstream
(https://groups.google.com/forum/#!topic/isl-development/6oEvNWOSQFE).
Differential Revision: https://reviews.llvm.org/D65562
llvm-svn: 367864
The -analyzer-stats flag now allows you to find out how much time was spent
on AST-based analysis and on path-sensitive analysis and, separately,
on bug visitors, as they're occasionally a performance problem on their own.
The total timer wasn't useful because there's anyway a total time printed out.
Remove it.
Differential Revision: https://reviews.llvm.org/D63227
llvm-svn: 364266
Summary:
We're using the clang static analyzer together with a number of
custom analyses in our CI system to ensure that certain invariants
are statiesfied for by the code every commit. Unfortunately, there
currently doesn't seem to be a good way to determine whether any
analyzer warnings were emitted, other than parsing clang's output
(or using scan-build, which then in turn parses clang's output).
As a simpler mechanism, simply add a `-analyzer-werror` flag to CC1
that causes the analyzer to emit its warnings as errors instead.
I briefly tried to have this be `Werror=analyzer` and make it go
through that machinery instead, but that seemed more trouble than
it was worth in terms of conflicting with options to the actual build
and special cases that would be required to circumvent the analyzers
usual attempts to quiet non-analyzer warnings. This is simple and it
works well.
Reviewed-By: NoQ, Szelethusw
Differential Revision: https://reviews.llvm.org/D62885
llvm-svn: 362855
Same patch as D62093, but for checker/plugin options, the only
difference being that options for alpha checkers are implicitly marked
as alpha.
Differential Revision: https://reviews.llvm.org/D62093
llvm-svn: 361566
These options are now only visible under
-analyzer-checker-option-help-developer.
Differential Revision: https://reviews.llvm.org/D61839
llvm-svn: 361561
Previously, the only way to display the list of available checkers was
to invoke the analyzer with -analyzer-checker-help frontend flag. This
however wasn't really great from a maintainer standpoint: users came
across checkers meant strictly for development purposes that weren't to
be tinkered with, or those that were still in development. This patch
creates a clearer division in between these categories.
From now on, we'll have 3 flags to display the list checkers. These
lists are mutually exclusive and can be used in any combination (for
example to display both stable and alpha checkers).
-analyzer-checker-help: Displays the list for stable, production ready
checkers.
-analyzer-checker-help-alpha: Displays the list for in development
checkers. Enabling is discouraged
for non-development purposes.
-analyzer-checker-help-developer: Modeling and debug checkers. Modeling
checkers shouldn't be enabled/disabled
by hand, and debug checkers shouldn't
be touched by users.
Differential Revision: https://reviews.llvm.org/D62093
llvm-svn: 361558
Add the new frontend flag -analyzer-checker-option-help to display all
checker/package options.
Differential Revision: https://reviews.llvm.org/D57858
llvm-svn: 361552
Since D57922, the config table contains every checker option, and it's default
value, so having it as an argument for getChecker*Option is redundant.
By the time any of the getChecker*Option function is called, we verified the
value in CheckerRegistry (after D57860), so we can confidently assert here, as
any irregularities detected at this point must be a programmer error. However,
in compatibility mode, verification won't happen, so the default value must be
restored.
This implies something else, other than adding removing one more potential point
of failure -- debug.ConfigDumper will always contain valid values for
checker/package options!
Differential Revision: https://reviews.llvm.org/D59195
llvm-svn: 361042
Validate whether the option exists, and also whether the supplied value is of
the correct type. With this patch, invoking the analyzer should be, at least
in the frontend mode, a lot safer.
Differential Revision: https://reviews.llvm.org/D57860
llvm-svn: 361011
The more entries we have in AnalyzerOptions::ConfigTable, the more helpful
debug.ConfigDumper is. With this patch, I'm pretty confident that it'll now emit
the entire state of the analyzer, minus the frontend flags.
It would be nice to reserve the config table specifically to checker options
only, as storing the regular analyzer configs is kinda redundant.
Differential Revision: https://reviews.llvm.org/D57922
llvm-svn: 361006
During my work on analyzer dependencies, I created a great amount of new
checkers that emitted no diagnostics at all, and were purely modeling some
function or another.
However, the user shouldn't really disable/enable these by hand, hence this
patch, which hides these by default. I intentionally chose not to hide alpha
checkers, because they have a scary enough name, in my opinion, to cause no
surprise when they emit false positives or cause crashes.
The patch introduces the Hidden bit into the TableGen files (you may remember
it before I removed it in D53995), and checkers that are either marked as
hidden, or are in a package that is marked hidden won't be displayed under
-analyzer-checker-help. -analyzer-checker-help-hidden, a new flag meant for
developers only, displays the full list.
Differential Revision: https://reviews.llvm.org/D60925
llvm-svn: 359720
Summary:
The existing CTU mechanism imports `FunctionDecl`s where the definition is available in another TU. This patch extends that to VarDecls, to bind more constants.
- Add VarDecl importing functionality to CrossTranslationUnitContext
- Import Decls while traversing them in AnalysisConsumer
- Add VarDecls to CTU external mappings generator
- Name changes from "external function map" to "external definition map"
Reviewers: NoQ, dcoughlin, xazax.hun, george.karpenkov, martong
Reviewed By: xazax.hun
Subscribers: Charusso, baloghadamsoftware, mikhail.ramalho, Szelethus, donat.nagy, dkrupp, george.karpenkov, mgorny, whisperity, szepet, rnkovacs, a.sidorin, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D46421
llvm-svn: 358968
TL;DR:
* Add checker and package options to the TableGen files
* Added a new class called CmdLineOption, and both Package and Checker recieved
a list<CmdLineOption> field.
* Added every existing checker and package option to Checkers.td.
* The CheckerRegistry class
* Received some comments to most of it's inline classes
* Received the CmdLineOption and PackageInfo inline classes, a list of
CmdLineOption was added to CheckerInfo and PackageInfo
* Added addCheckerOption and addPackageOption
* Added a new field called Packages, used in addPackageOptions, filled up in
addPackage
Detailed description:
In the last couple months, a lot of effort was put into tightening the
analyzer's command line interface. The main issue is that it's spectacularly
easy to mess up a lenghty enough invocation of the analyzer, and the user was
given no warnings or errors at all in that case.
We can divide the effort of resolving this into several chapters:
* Non-checker analyzer configurations:
Gather every analyzer configuration into a dedicated file. Emit errors for
non-existent configurations or incorrect values. Be able to list these
configurations. Tighten AnalyzerOptions interface to disallow making such
a mistake in the future.
* Fix the "Checker Naming Bug" by reimplementing checker dependencies:
When cplusplus.InnerPointer was enabled, it implicitly registered
unix.Malloc, which implicitly registered some sort of a modeling checker
from the CStringChecker family. This resulted in all of these checker
objects recieving the name "cplusplus.InnerPointer", making AnalyzerOptions
asking for the wrong checker options from the command line:
cplusplus.InnerPointer:Optimisic
istead of
unix.Malloc:Optimistic.
This was resolved by making CheckerRegistry responsible for checker
dependency handling, instead of checkers themselves.
* Checker options: (this patch included!)
Same as the first item, but for checkers.
(+ minor fixes here and there, and everything else that is yet to come)
There were several issues regarding checker options, that non-checker
configurations didn't suffer from: checker plugins are loaded runtime, and they
could add new checkers and new options, meaning that unlike for non-checker
configurations, we can't collect every checker option purely by generating code.
Also, as seen from the "Checker Naming Bug" issue raised above, they are very
rarely used in practice, and all sorts of skeletons fell out of the closet while
working on this project.
They were extremely problematic for users as well, purely because of how long
they were. Consider the following monster of a checker option:
alpha.cplusplus.UninitializedObject:CheckPointeeInitialization=false
While we were able to verify whether the checker itself (the part before the
colon) existed, any errors past that point were unreported, easily resulting
in 7+ hours of analyses going to waste.
This patch, similarly to how dependencies were reimplemented, uses TableGen to
register checker options into Checkers.td, so that Checkers.inc now contains
entries for both checker and package options. Using the preprocessor,
Checkers.inc is converted into code in CheckerRegistry, adding every builtin
(checkers and packages that have an entry in the Checkers.td file) checker and
package option to the registry. The new addPackageOption and addCheckerOption
functions expose the same functionality to statically-linked non-builtin and
plugin checkers and packages as well.
Emitting errors for incorrect user input, being able to list these options, and
some other functionalies will land in later patches.
Differential Revision: https://reviews.llvm.org/D57855
llvm-svn: 358752
Ideally, there is no reason behind not being able to depend on checkers that
come from a different plugin (or on builtin checkers) -- however, this is only
possible if all checkers are added to the registry before resolving checker
dependencies. Since I used a binary search in my addDependency method, this also
resulted in an assertion failure (due to CheckerRegistry::Checkers not being
sorted), since the function used by plugins to register their checkers
(clang_registerCheckers) calls addDependency.
This patch resolves this issue by only noting which dependencies have to
established when addDependency is called, and resolves them at a later stage
when no more checkers are added to the registry, by which point
CheckerRegistry::Checkers is already sorted.
Differential Revision: https://reviews.llvm.org/D59461
llvm-svn: 358750
There are barely any lines I haven't changed in these files, so I think I could
might as well leave it in an LLVM coding style conforming state. I also renamed
2 functions and moved addDependency out of line to ease on followup patches.
Differential Revision: https://reviews.llvm.org/D59457
llvm-svn: 358676
Remove CompilerInstance::VirtualFileSystem and
CompilerInstance::setVirtualFileSystem, instead relying on the VFS in
the FileManager. CompilerInstance and its clients already went to some
trouble to make these match. Now they are guaranteed to match.
As part of this, I added a VFS parameter (defaults to nullptr) to
CompilerInstance::createFileManager, to avoid repeating construction
logic in clients that just wanted to customize the VFS.
https://reviews.llvm.org/D59377
llvm-svn: 357037
Unfortunately, up until now, the fact that certain checkers depended on one
another was known, but how these actually unfolded was hidden deep within the
implementation. For example, many checkers (like RetainCount, Malloc or CString)
modelled a certain functionality, and exposed certain reportable bug types to
the user. For example, while MallocChecker models many many different types of
memory handling, the actual "unix.MallocChecker" checker the user was exposed to
was merely and option to this modeling part.
Other than this being an ugly mess, this issue made resolving the checker naming
issue almost impossible. (The checker naming issue being that if a checker
registered more than one checker within its registry function, both checker
object recieved the same name) Also, if the user explicitly disabled a checker
that was a dependency of another that _was_ explicitly enabled, it implicitly,
without "telling" the user, reenabled it.
Clearly, changing this to a well structured, declarative form, where the
handling of dependencies are done on a higher level is very much preferred.
This patch, among the detailed things later, makes checkers declare their
dependencies within the TableGen file Checkers.td, and exposes the same
functionality to plugins and statically linked non-generated checkers through
CheckerRegistry::addDependency. CheckerRegistry now resolves these dependencies,
makes sure that checkers are added to CheckerManager in the correct order,
and makes sure that if a dependency is disabled, so will be every checker that
depends on it.
In detail:
* Add a new field to the Checker class in CheckerBase.td called Dependencies,
which is a list of Checkers.
* Move unix checkers before cplusplus, as there is no forward declaration in
tblgen :/
* Add the following new checkers:
- StackAddrEscapeBase
- StackAddrEscapeBase
- CStringModeling
- DynamicMemoryModeling (base of the MallocChecker family)
- IteratorModeling (base of the IteratorChecker family)
- ValistBase
- SecuritySyntaxChecker (base of bcmp, bcopy, etc...)
- NSOrCFErrorDerefChecker (base of NSErrorChecker and CFErrorChecker)
- IvarInvalidationModeling (base of IvarInvalidation checker family)
- RetainCountBase (base of RetainCount and OSObjectRetainCount)
* Clear up and registry functions in MallocChecker, happily remove old FIXMEs.
* Add a new addDependency function to CheckerRegistry.
* Neatly format RUN lines in files I looked at while debugging.
Big thanks to Artem Degrachev for all the guidance through this project!
Differential Revision: https://reviews.llvm.org/D54438
llvm-svn: 352287
My last patch, D56989, moved the validation of whether a checker exists into
its constructor, but we do support statically linked (and non-plugin) checkers
that were do not have an entry in Checkers.td. However, the handling of this
happens after the creation of the CheckerRegistry object.
This patch fixes this bug by moving even this functionality into
CheckerRegistry's constructor.
llvm-svn: 352284
I added a new enum to CheckerInfo, so we can easily track whether the check is
explicitly enabled, explicitly disabled, or isn't specified in this regard.
Checkers belonging in the latter category may be implicitly enabled through
dependencies in the followup patch. I also made sure that this is done within
CheckerRegisty's constructor, leading to very significant simplifications in
its query-like methods.
Differential Revision: https://reviews.llvm.org/D56989
llvm-svn: 352282
Since pretty much all methods of CheckerRegistry has AnalyzerOptions as an
argument, it makes sense to just simply require it in it's constructor.
Differential Revision: https://reviews.llvm.org/D56988
llvm-svn: 352279
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
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
This adds anchors to all of the documented checks so that you can directly link to a check by a stable name. This is useful because the SARIF file format has a field for specifying a URI to documentation for a rule and some viewers, like CodeSonar, make use of this information. These links are then exposed through the SARIF exporter.
llvm-svn: 349812
Now that CheckerRegistry lies in Frontend, we can finally eliminate
ClangCheckerRegistry. Fortunately, this also provides us with a
DiagnosticsEngine, so I went ahead and removed some parameters from it's
methods.
Differential Revision: https://reviews.llvm.org/D54437
llvm-svn: 349280
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 ®istry);
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
Renaming collectCheckers to getEnabledCheckers
Changing the functionality to acquire all enabled checkers, rather then collect
checkers for a specific CheckerOptInfo (for example, collecting all checkers for
{ "core", true }, which meant enabling all checkers from the core package, which
was an unnecessary complication).
Removing CheckerOptInfo, instead of storing whether the option was claimed via a
field, we handle errors immediately, as getEnabledCheckers can now access a
DiagnosticsEngine. Realize that the remaining information it stored is directly
accessible through AnalyzerOptions.CheckerControlList.
Fix a test with -analyzer-disable-checker -verify accidentally left in.
llvm-svn: 349274
In earlier patches regarding AnalyzerOptions, a lot of effort went into
gathering all config options, and changing the interface so that potential
misuse can be eliminited.
Up until this point, AnalyzerOptions only evaluated an option when it was
querried. For example, if we had a "-no-false-positives" flag, AnalyzerOptions
would store an Optional field for it that would be None up until somewhere in
the code until the flag's getter function is called.
However, now that we're confident that we've gathered all configs, we can
evaluate off of them before analysis, so we can emit a error on invalid input
even if that prticular flag will not matter in that particular run of the
analyzer. Another very big benefit of this is that debug.ConfigDumper will now
show the value of all configs every single time.
Also, almost all options related class have a similar interface, so uniformity
is also a benefit.
The implementation for errors on invalid input will be commited shorty.
Differential Revision: https://reviews.llvm.org/D53692
llvm-svn: 348031
CheckerOptInfo feels very much out of place in CheckerRegistration.cpp, so I
moved it to CheckerRegistry.h.
Differential Revision: https://reviews.llvm.org/D54397
llvm-svn: 347157
Gabor Marton