RecordLayout.cpp source code [clang_source_code/lib/AST/RecordLayout.cpp]

1	//===- RecordLayout.cpp - Layout information for a struct/union -----------===//
2	//
3	// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4	// See https://llvm.org/LICENSE.txt for license information.
5	// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6	//
7	//===----------------------------------------------------------------------===//
8	//
9	// This file defines the RecordLayout interface.
10	//
11	//===----------------------------------------------------------------------===//
12
13	#include "clang/AST/RecordLayout.h"
14	#include "clang/AST/ASTContext.h"
15	#include "clang/Basic/TargetCXXABI.h"
16	#include "clang/Basic/TargetInfo.h"
17	#include <cassert>
18
19	using namespace clang;
20
21	void ASTRecordLayout::Destroy(ASTContext &Ctx) {
22	if (CXXInfo) {
23	CXXInfo->~CXXRecordLayoutInfo();
24	Ctx.Deallocate(CXXInfo);
25	}
26	this->~ASTRecordLayout();
27	Ctx.Deallocate(this);
28	}
29
30	ASTRecordLayout::ASTRecordLayout(const ASTContext &Ctx, CharUnits size,
31	CharUnits alignment,
32	CharUnits unadjustedAlignment,
33	CharUnits requiredAlignment,
34	CharUnits datasize,
35	ArrayRef<uint64_t> fieldoffsets)
36	: Size(size), DataSize(datasize), Alignment(alignment),
37	UnadjustedAlignment(unadjustedAlignment),
38	RequiredAlignment(requiredAlignment) {
39	FieldOffsets.append(Ctx, fieldoffsets.begin(), fieldoffsets.end());
40	}
41
42	// Constructor for C++ records.
43	ASTRecordLayout::ASTRecordLayout(const ASTContext &Ctx,
44	CharUnits size, CharUnits alignment,
45	CharUnits unadjustedAlignment,
46	CharUnits requiredAlignment,
47	bool hasOwnVFPtr, bool hasExtendableVFPtr,
48	CharUnits vbptroffset,
49	CharUnits datasize,
50	ArrayRef<uint64_t> fieldoffsets,
51	CharUnits nonvirtualsize,
52	CharUnits nonvirtualalignment,
53	CharUnits SizeOfLargestEmptySubobject,
54	const CXXRecordDecl *PrimaryBase,
55	bool IsPrimaryBaseVirtual,
56	const CXXRecordDecl *BaseSharingVBPtr,
57	bool EndsWithZeroSizedObject,
58	bool LeadsWithZeroSizedBase,
59	const BaseOffsetsMapTy& BaseOffsets,
60	const VBaseOffsetsMapTy& VBaseOffsets)
61	: Size(size), DataSize(datasize), Alignment(alignment),
62	UnadjustedAlignment(unadjustedAlignment),
63	RequiredAlignment(requiredAlignment), CXXInfo(new (Ctx) CXXRecordLayoutInfo)
64	{
65	FieldOffsets.append(Ctx, fieldoffsets.begin(), fieldoffsets.end());
66
67	CXXInfo->PrimaryBase.setPointer(PrimaryBase);
68	CXXInfo->PrimaryBase.setInt(IsPrimaryBaseVirtual);
69	CXXInfo->NonVirtualSize = nonvirtualsize;
70	CXXInfo->NonVirtualAlignment = nonvirtualalignment;
71	CXXInfo->SizeOfLargestEmptySubobject = SizeOfLargestEmptySubobject;
72	CXXInfo->BaseOffsets = BaseOffsets;
73	CXXInfo->VBaseOffsets = VBaseOffsets;
74	CXXInfo->HasOwnVFPtr = hasOwnVFPtr;
75	CXXInfo->VBPtrOffset = vbptroffset;
76	CXXInfo->HasExtendableVFPtr = hasExtendableVFPtr;
77	CXXInfo->BaseSharingVBPtr = BaseSharingVBPtr;
78	CXXInfo->EndsWithZeroSizedObject = EndsWithZeroSizedObject;
79	CXXInfo->LeadsWithZeroSizedBase = LeadsWithZeroSizedBase;
80
81	#ifndef NDEBUG
82	if (const CXXRecordDecl *PrimaryBase = getPrimaryBase()) {
83	if (isPrimaryBaseVirtual()) {
84	if (Ctx.getTargetInfo().getCXXABI().hasPrimaryVBases()) {
85	(0) . __assert_fail ("getVBaseClassOffset(PrimaryBase).isZero() && \"Primary virtual base must be at offset 0!\"", "/home/seafit/code_projects/clang_source/clang/lib/AST/RecordLayout.cpp", 86, __PRETTY_FUNCTION__))" file_link="../../../include/assert.h.html#88" macro="true">assert(getVBaseClassOffset(PrimaryBase).isZero() &&
86	(0) . __assert_fail ("getVBaseClassOffset(PrimaryBase).isZero() && \"Primary virtual base must be at offset 0!\"", "/home/seafit/code_projects/clang_source/clang/lib/AST/RecordLayout.cpp", 86, __PRETTY_FUNCTION__))" file_link="../../../include/assert.h.html#88" macro="true"> "Primary virtual base must be at offset 0!");
87	}
88	} else {
89	(0) . __assert_fail ("getBaseClassOffset(PrimaryBase).isZero() && \"Primary base must be at offset 0!\"", "/home/seafit/code_projects/clang_source/clang/lib/AST/RecordLayout.cpp", 90, __PRETTY_FUNCTION__))" file_link="../../../include/assert.h.html#88" macro="true">assert(getBaseClassOffset(PrimaryBase).isZero() &&
90	(0) . __assert_fail ("getBaseClassOffset(PrimaryBase).isZero() && \"Primary base must be at offset 0!\"", "/home/seafit/code_projects/clang_source/clang/lib/AST/RecordLayout.cpp", 90, __PRETTY_FUNCTION__))" file_link="../../../include/assert.h.html#88" macro="true"> "Primary base must be at offset 0!");
91	}
92	}
93	#endif
94	}
95

clang::ASTRecordLayout::Destroy

Clang Project