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📄 APValue.h(20.92 KB)
📄 AST.h(907 B)
📄 ASTConcept.h(7.02 KB)
📄 ASTConsumer.h(5.99 KB)
📄 ASTContext.h(122.68 KB)
📄 ASTContextAllocate.h(1.33 KB)
📄 ASTDiagnostic.h(1.34 KB)
📄 ASTDumper.h(1.59 KB)
📄 ASTDumperUtils.h(3.49 KB)
📄 ASTFwd.h(1.01 KB)
📄 ASTImporter.h(22.86 KB)
📄 ASTImporterLookupTable.h(2.7 KB)
📄 ASTImporterSharedState.h(2.51 KB)
📄 ASTLambda.h(3.04 KB)
📄 ASTMutationListener.h(5.84 KB)
📄 ASTNodeTraverser.h(21.38 KB)
📄 ASTStructuralEquivalence.h(5.08 KB)
📄 ASTTypeTraits.h(19.65 KB)
📄 ASTUnresolvedSet.h(3.37 KB)
📄 ASTVector.h(11.75 KB)
📄 AbstractBasicReader.h(8.82 KB)
📄 AbstractBasicWriter.h(7.97 KB)
📄 AbstractTypeReader.h(922 B)
📄 AbstractTypeWriter.h(944 B)
📄 Attr.h(11.87 KB)
📄 AttrIterator.h(4.14 KB)
📄 AttrVisitor.h(2.56 KB)
📄 Availability.h(1.97 KB)
📄 BaseSubobject.h(2.74 KB)
📄 BuiltinTypes.def(9.91 KB)
📄 CXXInheritance.h(14.87 KB)
📄 CXXRecordDeclDefinitionBits.def(9.23 KB)
📄 CanonicalType.h(24.86 KB)
📄 CharUnits.h(8.02 KB)
📄 Comment.h(31.03 KB)
📄 CommentBriefParser.h(1.39 KB)
📄 CommentCommandTraits.h(5.86 KB)
📄 CommentCommands.td(9.27 KB)
📄 CommentDiagnostic.h(509 B)
📄 CommentHTMLNamedCharacterReferences.td(4.98 KB)
📄 CommentHTMLTags.td(2.17 KB)
📄 CommentLexer.h(9.96 KB)
📄 CommentParser.h(3.24 KB)
📄 CommentSema.h(9.87 KB)
📄 CommentVisitor.h(2.38 KB)
📄 ComparisonCategories.h(7.41 KB)
📄 ComputeDependence.h(7.41 KB)
📄 CurrentSourceLocExprScope.h(2.43 KB)
📄 DataCollection.h(2.45 KB)
📄 Decl.h(168.07 KB)
📄 DeclAccessPair.h(1.77 KB)
📄 DeclBase.h(93.13 KB)
📄 DeclCXX.h(151.69 KB)
📄 DeclContextInternals.h(8.22 KB)
📄 DeclFriend.h(8.06 KB)
📄 DeclGroup.h(4.11 KB)
📄 DeclLookups.h(3.64 KB)
📄 DeclObjC.h(101.2 KB)
📄 DeclObjCCommon.h(1.72 KB)
📄 DeclOpenMP.h(19.33 KB)
📄 DeclTemplate.h(122.19 KB)
📄 DeclVisitor.h(2.51 KB)
📄 DeclarationName.h(33.77 KB)
📄 DependenceFlags.h(10.99 KB)
📄 DependentDiagnostic.h(5.4 KB)
📄 EvaluatedExprVisitor.h(4.45 KB)
📄 Expr.h(234.85 KB)
📄 ExprCXX.h(169.78 KB)
📄 ExprConcepts.h(19.62 KB)
📄 ExprObjC.h(58.96 KB)
📄 ExprOpenMP.h(15.48 KB)
📄 ExternalASTMerger.h(8.11 KB)
📄 ExternalASTSource.h(20.55 KB)
📄 FormatString.h(22.81 KB)
📄 GlobalDecl.h(7.16 KB)
📄 JSONNodeDumper.h(17.53 KB)
📄 LambdaCapture.h(4.71 KB)
📄 LexicallyOrderedRecursiveASTVisitor.h(5.92 KB)
📄 LocInfoType.h(1.84 KB)
📄 Mangle.h(10.65 KB)
📄 MangleNumberingContext.h(2 KB)
📄 NSAPI.h(9.23 KB)
📄 NestedNameSpecifier.h(18.53 KB)
📄 NonTrivialTypeVisitor.h(4 KB)
📄 ODRHash.h(3.42 KB)
📄 OSLog.h(5.08 KB)
📄 OpenMPClause.h(276.08 KB)
📄 OperationKinds.def(14.91 KB)
📄 OperationKinds.h(1.5 KB)
📄 OptionalDiagnostic.h(2.39 KB)
📄 ParentMap.h(1.89 KB)
📄 ParentMapContext.h(4.74 KB)
📄 PrettyDeclStackTrace.h(1.39 KB)
📄 PrettyPrinter.h(8.47 KB)
📄 PropertiesBase.td(17.03 KB)
📄 QualTypeNames.h(3.15 KB)
📄 RawCommentList.h(6.6 KB)
📄 RecordLayout.h(11.49 KB)
📄 RecursiveASTVisitor.h(124.41 KB)
📄 Redeclarable.h(14.34 KB)
📄 SelectorLocationsKind.h(3.28 KB)
📄 Stmt.h(113 KB)
📄 StmtCXX.h(17.59 KB)
📄 StmtDataCollectors.td(5.64 KB)
📄 StmtGraphTraits.h(2.18 KB)
📄 StmtIterator.h(4.2 KB)
📄 StmtObjC.h(12.86 KB)
📄 StmtOpenMP.h(189.5 KB)
📄 StmtVisitor.h(8.74 KB)
📄 TemplateArgumentVisitor.h(3.38 KB)
📄 TemplateBase.h(22.86 KB)
📄 TemplateName.h(19.34 KB)
📄 TextNodeDumper.h(15.7 KB)
📄 Type.h(248.38 KB)
📄 TypeLoc.h(73.03 KB)
📄 TypeLocNodes.def(1.45 KB)
📄 TypeLocVisitor.h(1.76 KB)
📄 TypeOrdering.h(2.38 KB)
📄 TypeProperties.td(25.87 KB)
📄 TypeVisitor.h(3.32 KB)
📄 UnresolvedSet.h(5.25 KB)
📄 VTTBuilder.h(5.19 KB)
📄 VTableBuilder.h(20.31 KB)

Editing: OSLog.h

//= OSLog.h - Analysis of calls to os_log builtins --*- C++ -*-===============//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file defines APIs for determining the layout of the data buffer for
// os_log() and os_trace().
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_ANALYSIS_ANALYSES_OSLOG_H
#define LLVM_CLANG_ANALYSIS_ANALYSES_OSLOG_H

#include "clang/AST/ASTContext.h"
#include "clang/AST/Expr.h"

namespace clang {
namespace analyze_os_log {

/// An OSLogBufferItem represents a single item in the data written by a call
/// to os_log() or os_trace().
class OSLogBufferItem {
public:
  enum Kind {
    // The item is a scalar (int, float, raw pointer, etc.). No further copying
    // is required. This is the only kind allowed by os_trace().
    ScalarKind = 0,

// The item is a count, which describes the length of the following item to
    // be copied. A count may only be followed by an item of kind StringKind,
    // WideStringKind, or PointerKind.
    CountKind,

// The item is a pointer to a C string. If preceded by a count 'n',
    // os_log() will copy at most 'n' bytes from the pointer.
    StringKind,

// The item is a pointer to a block of raw data. This item must be preceded
    // by a count 'n'. os_log() will copy exactly 'n' bytes from the pointer.
    PointerKind,

// The item is a pointer to an Objective-C object. os_log() may retain the
    // object for later processing.
    ObjCObjKind,

// The item is a pointer to wide-char string.
    WideStringKind,

// The item is corresponding to the '%m' format specifier, no value is
    // populated in the buffer and the runtime is loading the errno value.
    ErrnoKind,

// The item is a mask type.
    MaskKind
  };

enum {
    // The item is marked "private" in the format string.
    IsPrivate = 0x1,

// The item is marked "public" in the format string.
    IsPublic = 0x2,

// The item is marked "sensitive" in the format string.
    IsSensitive = 0x4 | IsPrivate
  };

private:
  Kind TheKind = ScalarKind;
  const Expr *TheExpr = nullptr;
  CharUnits ConstValue;
  CharUnits Size; // size of the data, not including the header bytes
  unsigned Flags = 0;
  StringRef MaskType;

public:
  OSLogBufferItem(Kind kind, const Expr *expr, CharUnits size, unsigned flags,
                  StringRef maskType = StringRef())
      : TheKind(kind), TheExpr(expr), Size(size), Flags(flags),
        MaskType(maskType) {
    assert(((Flags == 0) || (Flags == IsPrivate) || (Flags == IsPublic) ||
            (Flags == IsSensitive)) &&
           "unexpected privacy flag");
  }

OSLogBufferItem(ASTContext &Ctx, CharUnits value, unsigned flags)
      : TheKind(CountKind), ConstValue(value),
        Size(Ctx.getTypeSizeInChars(Ctx.IntTy)), Flags(flags) {}

unsigned char getDescriptorByte() const {
    unsigned char result = Flags;
    result |= ((unsigned)getKind()) << 4;
    return result;
  }

unsigned char getSizeByte() const { return size().getQuantity(); }

Kind getKind() const { return TheKind; }
  bool getIsPrivate() const { return (Flags & IsPrivate) != 0; }

const Expr *getExpr() const { return TheExpr; }
  CharUnits getConstValue() const { return ConstValue; }
  CharUnits size() const { return Size; }

StringRef getMaskType() const { return MaskType; }
};

class OSLogBufferLayout {
public:
  SmallVector<OSLogBufferItem, 4> Items;

enum Flags { HasPrivateItems = 1, HasNonScalarItems = 1 << 1 };

CharUnits size() const {
    CharUnits result;
    result += CharUnits::fromQuantity(2); // summary byte, num-args byte
    for (auto &item : Items) {
      // descriptor byte, size byte
      result += item.size() + CharUnits::fromQuantity(2);
    }
    return result;
  }

bool hasPrivateItems() const {
    return llvm::any_of(
        Items, [](const OSLogBufferItem &Item) { return Item.getIsPrivate(); });
  }

bool hasNonScalarOrMask() const {
    return llvm::any_of(Items, [](const OSLogBufferItem &Item) {
      return Item.getKind() != OSLogBufferItem::ScalarKind ||
             !Item.getMaskType().empty();
    });
  }

unsigned char getSummaryByte() const {
    unsigned char result = 0;
    if (hasPrivateItems())
      result |= HasPrivateItems;
    if (hasNonScalarOrMask())
      result |= HasNonScalarItems;
    return result;
  }

unsigned char getNumArgsByte() const { return Items.size(); }
};

// Given a call 'E' to one of the builtins __builtin_os_log_format() or
// __builtin_os_log_format_buffer_size(), compute the layout of the buffer that
// the call will write into and store it in 'layout'. Returns 'false' if there
// was some error encountered while computing the layout, and 'true' otherwise.
bool computeOSLogBufferLayout(clang::ASTContext &Ctx, const clang::CallExpr *E,
                              OSLogBufferLayout &layout);

} // namespace analyze_os_log
} // namespace clang
#endif

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Editing: OSLog.h

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