[PATCH] Expose the name of the checker producing each diagnostic message.

[Alexander Kornienko]

Hi jordan_rose, krememek,

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 CheckerName field to the CheckerBase class, and sets it in
the CheckerManager::registerChecker() method, which gets them from the
CheckerRegistry class through register.*Checker() functions. This allows seing
one of the checker names (in the format, that can be used in the
-analyze-checkers= option), that was used to create this checker (we can also
store all of them, which will be a bit more expensive, but probably a bit more
consistent).

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

Files:
  examples/analyzer-plugin/MainCallChecker.cpp
  include/clang/StaticAnalyzer/Core/BugReporter/BugReporter.h
  include/clang/StaticAnalyzer/Core/BugReporter/BugType.h
  include/clang/StaticAnalyzer/Core/BugReporter/PathDiagnostic.h
  include/clang/StaticAnalyzer/Core/Checker.h
  include/clang/StaticAnalyzer/Core/CheckerManager.h
  include/clang/StaticAnalyzer/Core/CheckerRegistry.h
  lib/StaticAnalyzer/Checkers/AnalyzerStatsChecker.cpp
  lib/StaticAnalyzer/Checkers/ArrayBoundChecker.cpp
  lib/StaticAnalyzer/Checkers/ArrayBoundCheckerV2.cpp
  lib/StaticAnalyzer/Checkers/BasicObjCFoundationChecks.cpp
  lib/StaticAnalyzer/Checkers/BoolAssignmentChecker.cpp
  lib/StaticAnalyzer/Checkers/BuiltinFunctionChecker.cpp
  lib/StaticAnalyzer/Checkers/CStringChecker.cpp
  lib/StaticAnalyzer/Checkers/CStringSyntaxChecker.cpp
  lib/StaticAnalyzer/Checkers/CallAndMessageChecker.cpp
  lib/StaticAnalyzer/Checkers/CastSizeChecker.cpp
  lib/StaticAnalyzer/Checkers/CastToStructChecker.cpp
  lib/StaticAnalyzer/Checkers/CheckObjCDealloc.cpp
  lib/StaticAnalyzer/Checkers/CheckObjCInstMethSignature.cpp
  lib/StaticAnalyzer/Checkers/CheckSecuritySyntaxOnly.cpp
  lib/StaticAnalyzer/Checkers/CheckSizeofPointer.cpp
  lib/StaticAnalyzer/Checkers/ChrootChecker.cpp
  lib/StaticAnalyzer/Checkers/ClangSACheckers.h
  lib/StaticAnalyzer/Checkers/DeadStoresChecker.cpp
  lib/StaticAnalyzer/Checkers/DebugCheckers.cpp
  lib/StaticAnalyzer/Checkers/DereferenceChecker.cpp
  lib/StaticAnalyzer/Checkers/DirectIvarAssignment.cpp
  lib/StaticAnalyzer/Checkers/DivZeroChecker.cpp
  lib/StaticAnalyzer/Checkers/DynamicTypePropagation.cpp
  lib/StaticAnalyzer/Checkers/ExprInspectionChecker.cpp
  lib/StaticAnalyzer/Checkers/FixedAddressChecker.cpp
  lib/StaticAnalyzer/Checkers/GenericTaintChecker.cpp
  lib/StaticAnalyzer/Checkers/IdenticalExprChecker.cpp
  lib/StaticAnalyzer/Checkers/InterCheckerAPI.h
  lib/StaticAnalyzer/Checkers/IvarInvalidationChecker.cpp
  lib/StaticAnalyzer/Checkers/LLVMConventionsChecker.cpp
  lib/StaticAnalyzer/Checkers/MacOSKeychainAPIChecker.cpp
  lib/StaticAnalyzer/Checkers/MacOSXAPIChecker.cpp
  lib/StaticAnalyzer/Checkers/MallocChecker.cpp
  lib/StaticAnalyzer/Checkers/MallocOverflowSecurityChecker.cpp
  lib/StaticAnalyzer/Checkers/MallocSizeofChecker.cpp
  lib/StaticAnalyzer/Checkers/NSAutoreleasePoolChecker.cpp
  lib/StaticAnalyzer/Checkers/NSErrorChecker.cpp
  lib/StaticAnalyzer/Checkers/NoReturnFunctionChecker.cpp
  lib/StaticAnalyzer/Checkers/NonNullParamChecker.cpp
  lib/StaticAnalyzer/Checkers/ObjCAtSyncChecker.cpp
  lib/StaticAnalyzer/Checkers/ObjCContainersASTChecker.cpp
  lib/StaticAnalyzer/Checkers/ObjCContainersChecker.cpp
  lib/StaticAnalyzer/Checkers/ObjCMissingSuperCallChecker.cpp
  lib/StaticAnalyzer/Checkers/ObjCSelfInitChecker.cpp
  lib/StaticAnalyzer/Checkers/ObjCUnusedIVarsChecker.cpp
  lib/StaticAnalyzer/Checkers/PointerArithChecker.cpp
  lib/StaticAnalyzer/Checkers/PointerSubChecker.cpp
  lib/StaticAnalyzer/Checkers/PthreadLockChecker.cpp
  lib/StaticAnalyzer/Checkers/RetainCountChecker.cpp
  lib/StaticAnalyzer/Checkers/ReturnPointerRangeChecker.cpp
  lib/StaticAnalyzer/Checkers/ReturnUndefChecker.cpp
  lib/StaticAnalyzer/Checkers/SimpleStreamChecker.cpp
  lib/StaticAnalyzer/Checkers/StackAddrEscapeChecker.cpp
  lib/StaticAnalyzer/Checkers/StreamChecker.cpp
  lib/StaticAnalyzer/Checkers/TaintTesterChecker.cpp
  lib/StaticAnalyzer/Checkers/TraversalChecker.cpp
  lib/StaticAnalyzer/Checkers/UndefBranchChecker.cpp
  lib/StaticAnalyzer/Checkers/UndefCapturedBlockVarChecker.cpp
  lib/StaticAnalyzer/Checkers/UndefResultChecker.cpp
  lib/StaticAnalyzer/Checkers/UndefinedArraySubscriptChecker.cpp
  lib/StaticAnalyzer/Checkers/UndefinedAssignmentChecker.cpp
  lib/StaticAnalyzer/Checkers/UnixAPIChecker.cpp
  lib/StaticAnalyzer/Checkers/UnreachableCodeChecker.cpp
  lib/StaticAnalyzer/Checkers/VLASizeChecker.cpp
  lib/StaticAnalyzer/Checkers/VirtualCallChecker.cpp
  lib/StaticAnalyzer/Core/BugReporter.cpp
  lib/StaticAnalyzer/Core/Checker.cpp
  lib/StaticAnalyzer/Core/CheckerRegistry.cpp
  lib/StaticAnalyzer/Core/PathDiagnostic.cpp
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