RecordLayout.cpp
3.95 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
//===- RecordLayout.cpp - Layout information for a struct/union -----------===//
//
// 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 the RecordLayout interface.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/RecordLayout.h"
#include "clang/AST/ASTContext.h"
#include "clang/Basic/TargetCXXABI.h"
#include "clang/Basic/TargetInfo.h"
#include <cassert>
using namespace clang;
void ASTRecordLayout::Destroy(ASTContext &Ctx) {
if (CXXInfo) {
CXXInfo->~CXXRecordLayoutInfo();
Ctx.Deallocate(CXXInfo);
}
this->~ASTRecordLayout();
Ctx.Deallocate(this);
}
ASTRecordLayout::ASTRecordLayout(const ASTContext &Ctx, CharUnits size,
CharUnits alignment,
CharUnits unadjustedAlignment,
CharUnits requiredAlignment,
CharUnits datasize,
ArrayRef<uint64_t> fieldoffsets)
: Size(size), DataSize(datasize), Alignment(alignment),
UnadjustedAlignment(unadjustedAlignment),
RequiredAlignment(requiredAlignment) {
FieldOffsets.append(Ctx, fieldoffsets.begin(), fieldoffsets.end());
}
// Constructor for C++ records.
ASTRecordLayout::ASTRecordLayout(const ASTContext &Ctx,
CharUnits size, CharUnits alignment,
CharUnits unadjustedAlignment,
CharUnits requiredAlignment,
bool hasOwnVFPtr, bool hasExtendableVFPtr,
CharUnits vbptroffset,
CharUnits datasize,
ArrayRef<uint64_t> fieldoffsets,
CharUnits nonvirtualsize,
CharUnits nonvirtualalignment,
CharUnits SizeOfLargestEmptySubobject,
const CXXRecordDecl *PrimaryBase,
bool IsPrimaryBaseVirtual,
const CXXRecordDecl *BaseSharingVBPtr,
bool EndsWithZeroSizedObject,
bool LeadsWithZeroSizedBase,
const BaseOffsetsMapTy& BaseOffsets,
const VBaseOffsetsMapTy& VBaseOffsets)
: Size(size), DataSize(datasize), Alignment(alignment),
UnadjustedAlignment(unadjustedAlignment),
RequiredAlignment(requiredAlignment), CXXInfo(new (Ctx) CXXRecordLayoutInfo)
{
FieldOffsets.append(Ctx, fieldoffsets.begin(), fieldoffsets.end());
CXXInfo->PrimaryBase.setPointer(PrimaryBase);
CXXInfo->PrimaryBase.setInt(IsPrimaryBaseVirtual);
CXXInfo->NonVirtualSize = nonvirtualsize;
CXXInfo->NonVirtualAlignment = nonvirtualalignment;
CXXInfo->SizeOfLargestEmptySubobject = SizeOfLargestEmptySubobject;
CXXInfo->BaseOffsets = BaseOffsets;
CXXInfo->VBaseOffsets = VBaseOffsets;
CXXInfo->HasOwnVFPtr = hasOwnVFPtr;
CXXInfo->VBPtrOffset = vbptroffset;
CXXInfo->HasExtendableVFPtr = hasExtendableVFPtr;
CXXInfo->BaseSharingVBPtr = BaseSharingVBPtr;
CXXInfo->EndsWithZeroSizedObject = EndsWithZeroSizedObject;
CXXInfo->LeadsWithZeroSizedBase = LeadsWithZeroSizedBase;
#ifndef NDEBUG
if (const CXXRecordDecl *PrimaryBase = getPrimaryBase()) {
if (isPrimaryBaseVirtual()) {
if (Ctx.getTargetInfo().getCXXABI().hasPrimaryVBases()) {
assert(getVBaseClassOffset(PrimaryBase).isZero() &&
"Primary virtual base must be at offset 0!");
}
} else {
assert(getBaseClassOffset(PrimaryBase).isZero() &&
"Primary base must be at offset 0!");
}
}
#endif
}