clang  6.0.0svn
Namespaces | Enumerations | Functions
AnalysisBasedWarnings.cpp File Reference
#include "clang/Sema/AnalysisBasedWarnings.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/EvaluatedExprVisitor.h"
#include "clang/AST/ExprCXX.h"
#include "clang/AST/ExprObjC.h"
#include "clang/AST/ParentMap.h"
#include "clang/AST/RecursiveASTVisitor.h"
#include "clang/AST/StmtCXX.h"
#include "clang/AST/StmtObjC.h"
#include "clang/AST/StmtVisitor.h"
#include "clang/Analysis/Analyses/CFGReachabilityAnalysis.h"
#include "clang/Analysis/Analyses/Consumed.h"
#include "clang/Analysis/Analyses/ReachableCode.h"
#include "clang/Analysis/Analyses/ThreadSafety.h"
#include "clang/Analysis/Analyses/UninitializedValues.h"
#include "clang/Analysis/AnalysisDeclContext.h"
#include "clang/Analysis/CFG.h"
#include "clang/Analysis/CFGStmtMap.h"
#include "clang/Basic/SourceLocation.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Sema/ScopeInfo.h"
#include "clang/Sema/SemaInternal.h"
#include "llvm/ADT/BitVector.h"
#include "llvm/ADT/MapVector.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Casting.h"
#include <algorithm>
#include <deque>
#include <iterator>
Include dependency graph for AnalysisBasedWarnings.cpp:

Go to the source code of this file.

Namespaces

 clang
 Dataflow Directional Tag Classes.
 
 clang::threadSafety
 
 clang::consumed
 

Enumerations

enum  RecursiveState { FoundNoPath, FoundPath, FoundPathWithNoRecursiveCall }
 
enum  ThrowState { FoundNoPathForThrow, FoundPathForThrow, FoundPathWithNoThrowOutFunction }
 
enum  ControlFlowKind {
  UnknownFallThrough, NeverFallThrough, MaybeFallThrough, AlwaysFallThrough,
  NeverFallThroughOrReturn
}
 

Functions

static void CheckUnreachable (Sema &S, AnalysisDeclContext &AC)
 CheckUnreachable - Check for unreachable code. More...
 
static bool hasRecursiveCallInPath (const FunctionDecl *FD, CFGBlock &Block)
 
static bool checkForRecursiveFunctionCall (const FunctionDecl *FD, CFG *cfg)
 
static void checkRecursiveFunction (Sema &S, const FunctionDecl *FD, const Stmt *Body, AnalysisDeclContext &AC)
 
static bool isThrowCaught (const CXXThrowExpr *Throw, const CXXCatchStmt *Catch)
 
static bool isThrowCaughtByHandlers (const CXXThrowExpr *CE, const CXXTryStmt *TryStmt)
 
static bool doesThrowEscapePath (CFGBlock Block, SourceLocation &OpLoc)
 
static bool hasThrowOutNonThrowingFunc (SourceLocation &OpLoc, CFG *BodyCFG)
 
static void EmitDiagForCXXThrowInNonThrowingFunc (Sema &S, SourceLocation OpLoc, const FunctionDecl *FD)
 
static void checkThrowInNonThrowingFunc (Sema &S, const FunctionDecl *FD, AnalysisDeclContext &AC)
 
static bool isNoexcept (const FunctionDecl *FD)
 
static ControlFlowKind CheckFallThrough (AnalysisDeclContext &AC)
 CheckFallThrough - Check that we don't fall off the end of a Statement that should return a value. More...
 
static void CheckFallThroughForBody (Sema &S, const Decl *D, const Stmt *Body, const BlockExpr *blkExpr, const CheckFallThroughDiagnostics &CD, AnalysisDeclContext &AC)
 CheckFallThroughForFunctionDef - Check that we don't fall off the end of a function that should return a value. More...
 
static bool SuggestInitializationFixit (Sema &S, const VarDecl *VD)
 
static void CreateIfFixit (Sema &S, const Stmt *If, const Stmt *Then, const Stmt *Else, bool CondVal, FixItHint &Fixit1, FixItHint &Fixit2)
 Create a fixit to remove an if-like statement, on the assumption that its condition is CondVal. More...
 
static void DiagUninitUse (Sema &S, const VarDecl *VD, const UninitUse &Use, bool IsCapturedByBlock)
 DiagUninitUse – Helper function to produce a diagnostic for an uninitialized use of a variable. More...
 
static bool DiagnoseUninitializedUse (Sema &S, const VarDecl *VD, const UninitUse &Use, bool alwaysReportSelfInit=false)
 DiagnoseUninitializedUse – Helper function for diagnosing uses of an uninitialized variable. More...
 
static StringRef getFallthroughAttrSpelling (Preprocessor &PP, SourceLocation Loc)
 
static void DiagnoseSwitchLabelsFallthrough (Sema &S, AnalysisDeclContext &AC, bool PerFunction)
 
static bool isInLoop (const ASTContext &Ctx, const ParentMap &PM, const Stmt *S)
 
static void diagnoseRepeatedUseOfWeak (Sema &S, const sema::FunctionScopeInfo *CurFn, const Decl *D, const ParentMap &PM)
 
static unsigned isEnabled (DiagnosticsEngine &D, unsigned diag)
 
static void flushDiagnostics (Sema &S, const sema::FunctionScopeInfo *fscope)
 

Enumeration Type Documentation

◆ ControlFlowKind

Enumerator
UnknownFallThrough 
NeverFallThrough 
MaybeFallThrough 
AlwaysFallThrough 
NeverFallThroughOrReturn 

Definition at line 437 of file AnalysisBasedWarnings.cpp.

◆ RecursiveState

Enumerator
FoundNoPath 
FoundPath 
FoundPathWithNoRecursiveCall 

Definition at line 205 of file AnalysisBasedWarnings.cpp.

◆ ThrowState

enum ThrowState
Enumerator
FoundNoPathForThrow 
FoundPathForThrow 
FoundPathWithNoThrowOutFunction 

Definition at line 284 of file AnalysisBasedWarnings.cpp.

Function Documentation

◆ CheckFallThrough()

static ControlFlowKind CheckFallThrough ( AnalysisDeclContext AC)
static

CheckFallThrough - Check that we don't fall off the end of a Statement that should return a value.

Returns
AlwaysFallThrough iff we always fall off the end of the statement, MaybeFallThrough iff we might or might not fall off the end, NeverFallThroughOrReturn iff we never fall off the end of the statement or return. We assume NeverFallThrough iff we never fall off the end of the statement but we may return. We assume that functions not marked noreturn will return.

Definition at line 454 of file AnalysisBasedWarnings.cpp.

References clang::AnalysisDeclContext::getAddEHEdges(), clang::AnalysisDeclContext::getCFG(), clang::CFG::getEntry(), clang::CFG::getNumBlockIDs(), clang::CFGBlock::FilterOptions::IgnoreDefaultsWithCoveredEnums, clang::reachable_code::ScanReachableFromBlock(), and UnknownFallThrough.

Referenced by CheckFallThroughForBody().

◆ CheckFallThroughForBody()

static void CheckFallThroughForBody ( Sema S,
const Decl D,
const Stmt Body,
const BlockExpr blkExpr,
const CheckFallThroughDiagnostics &  CD,
AnalysisDeclContext AC 
)
static

CheckFallThroughForFunctionDef - Check that we don't fall off the end of a function that should return a value.

Check that we don't fall off the end of a noreturn function. We assume that functions and blocks not marked noreturn will return.

Definition at line 690 of file AnalysisBasedWarnings.cpp.

References AlwaysFallThrough, CheckFallThrough(), clang::sema::FunctionScopeInfo::CoroutinePromise, clang::Sema::Diag(), clang::Type::getAs(), clang::Sema::getCurFunction(), clang::Sema::getDiagnostics(), clang::Stmt::getLocEnd(), clang::Stmt::getLocStart(), clang::Type::getPointeeType(), clang::Expr::getType(), clang::ValueDecl::getType(), clang::sema::FunctionScopeInfo::isCoroutine(), MaybeFallThrough, NeverFallThrough, NeverFallThroughOrReturn, and UnknownFallThrough.

Referenced by clang::sema::AnalysisBasedWarnings::IssueWarnings().

◆ checkForRecursiveFunctionCall()

static bool checkForRecursiveFunctionCall ( const FunctionDecl FD,
CFG cfg 
)
static

◆ checkRecursiveFunction()

static void checkRecursiveFunction ( Sema S,
const FunctionDecl FD,
const Stmt Body,
AnalysisDeclContext AC 
)
static

◆ checkThrowInNonThrowingFunc()

static void checkThrowInNonThrowingFunc ( Sema S,
const FunctionDecl FD,
AnalysisDeclContext AC 
)
static

◆ CheckUnreachable()

static void CheckUnreachable ( Sema S,
AnalysisDeclContext AC 
)
static

◆ CreateIfFixit()

static void CreateIfFixit ( Sema S,
const Stmt If,
const Stmt Then,
const Stmt Else,
bool  CondVal,
FixItHint Fixit1,
FixItHint Fixit2 
)
static

Create a fixit to remove an if-like statement, on the assumption that its condition is CondVal.

Definition at line 835 of file AnalysisBasedWarnings.cpp.

References clang::FixItHint::CreateRemoval(), clang::CharSourceRange::getCharRange(), clang::Stmt::getLocEnd(), clang::Sema::getLocForEndOfToken(), clang::Stmt::getLocStart(), and clang::Stmt::getSourceRange().

◆ diagnoseRepeatedUseOfWeak()

static void diagnoseRepeatedUseOfWeak ( Sema S,
const sema::FunctionScopeInfo CurFn,
const Decl D,
const ParentMap PM 
)
static

◆ DiagnoseSwitchLabelsFallthrough()

static void DiagnoseSwitchLabelsFallthrough ( Sema S,
AnalysisDeclContext AC,
bool  PerFunction 
)
static

◆ DiagnoseUninitializedUse()

static bool DiagnoseUninitializedUse ( Sema S,
const VarDecl VD,
const UninitUse Use,
bool  alwaysReportSelfInit = false 
)
static

DiagnoseUninitializedUse – Helper function for diagnosing uses of an uninitialized variable.

This manages the different forms of diagnostic emitted for particular types of uses. Returns true if the use was diagnosed as a warning. If a particular use is one we omit warnings for, returns false.

Definition at line 1033 of file AnalysisBasedWarnings.cpp.

References clang::Sema::Context, clang::Sema::Diag(), DiagUninitUse(), clang::NamedDecl::getDeclName(), clang::VarDecl::getInit(), clang::Decl::getLocation(), clang::DeclaratorDecl::getLocStart(), clang::BlockExpr::getLocStart(), clang::ValueDecl::getType(), clang::UninitUse::getUser(), clang::Decl::hasAttr(), clang::Type::isBlockPointerType(), and SuggestInitializationFixit().

◆ DiagUninitUse()

static void DiagUninitUse ( Sema S,
const VarDecl VD,
const UninitUse Use,
bool  IsCapturedByBlock 
)
static

◆ doesThrowEscapePath()

static bool doesThrowEscapePath ( CFGBlock  Block,
SourceLocation OpLoc 
)
static

Definition at line 331 of file AnalysisBasedWarnings.cpp.

References clang::CFGElement::Statement.

◆ EmitDiagForCXXThrowInNonThrowingFunc()

static void EmitDiagForCXXThrowInNonThrowingFunc ( Sema S,
SourceLocation  OpLoc,
const FunctionDecl FD 
)
static

◆ flushDiagnostics()

static void flushDiagnostics ( Sema S,
const sema::FunctionScopeInfo fscope 
)
static

◆ getFallthroughAttrSpelling()

static StringRef getFallthroughAttrSpelling ( Preprocessor PP,
SourceLocation  Loc 
)
static

◆ hasRecursiveCallInPath()

static bool hasRecursiveCallInPath ( const FunctionDecl FD,
CFGBlock Block 
)
static

◆ hasThrowOutNonThrowingFunc()

static bool hasThrowOutNonThrowingFunc ( SourceLocation OpLoc,
CFG BodyCFG 
)
static

◆ isEnabled()

static unsigned isEnabled ( DiagnosticsEngine D,
unsigned  diag 
)
static

◆ isInLoop()

static bool isInLoop ( const ASTContext Ctx,
const ParentMap PM,
const Stmt S 
)
static

Definition at line 1370 of file AnalysisBasedWarnings.cpp.

References clang::Stmt::getStmtClass().

◆ isNoexcept()

static bool isNoexcept ( const FunctionDecl FD)
static

◆ isThrowCaught()

static bool isThrowCaught ( const CXXThrowExpr Throw,
const CXXCatchStmt Catch 
)
static

◆ isThrowCaughtByHandlers()

static bool isThrowCaughtByHandlers ( const CXXThrowExpr CE,
const CXXTryStmt TryStmt 
)
static

Definition at line 322 of file AnalysisBasedWarnings.cpp.

◆ SuggestInitializationFixit()

static bool SuggestInitializationFixit ( Sema S,
const VarDecl VD 
)
static

Variable Documentation

◆ SM

Definition at line 1647 of file AnalysisBasedWarnings.cpp.