mirror of
https://github.com/c64scene-ar/llvm-6502.git
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intermediate representation. This - increases consistency by using the same granularity everywhere - allows for pieces < 1 byte - DW_OP_piece didn't actually allow storing an offset. Part of PR22495. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228631 91177308-0d34-0410-b5e6-96231b3b80d8
1164 lines
39 KiB
C++
1164 lines
39 KiB
C++
//===- DebugInfo.h - Debug Information Helpers ------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines a bunch of datatypes that are useful for creating and
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// walking debug info in LLVM IR form. They essentially provide wrappers around
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// the information in the global variables that's needed when constructing the
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// DWARF information.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_IR_DEBUGINFO_H
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#define LLVM_IR_DEBUGINFO_H
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ADT/iterator_range.h"
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#include "llvm/IR/DebugInfoMetadata.h"
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#include "llvm/Support/Casting.h"
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#include "llvm/Support/Dwarf.h"
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#include "llvm/Support/ErrorHandling.h"
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#include <iterator>
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namespace llvm {
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class BasicBlock;
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class Constant;
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class Function;
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class GlobalVariable;
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class Module;
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class Type;
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class Value;
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class DbgDeclareInst;
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class DbgValueInst;
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class Instruction;
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class Metadata;
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class MDNode;
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class MDString;
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class NamedMDNode;
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class LLVMContext;
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class raw_ostream;
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class DIFile;
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class DISubprogram;
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class DILexicalBlock;
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class DILexicalBlockFile;
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class DIVariable;
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class DIType;
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class DIScope;
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class DIObjCProperty;
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/// \brief Maps from type identifier to the actual MDNode.
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typedef DenseMap<const MDString *, MDNode *> DITypeIdentifierMap;
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class DIHeaderFieldIterator
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: public std::iterator<std::input_iterator_tag, StringRef, std::ptrdiff_t,
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const StringRef *, StringRef> {
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StringRef Header;
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StringRef Current;
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public:
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DIHeaderFieldIterator() {}
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explicit DIHeaderFieldIterator(StringRef Header)
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: Header(Header), Current(Header.slice(0, Header.find('\0'))) {}
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StringRef operator*() const { return Current; }
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const StringRef *operator->() const { return &Current; }
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DIHeaderFieldIterator &operator++() {
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increment();
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return *this;
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}
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DIHeaderFieldIterator operator++(int) {
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DIHeaderFieldIterator X(*this);
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increment();
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return X;
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}
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bool operator==(const DIHeaderFieldIterator &X) const {
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return Current.data() == X.Current.data();
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}
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bool operator!=(const DIHeaderFieldIterator &X) const {
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return !(*this == X);
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}
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StringRef getHeader() const { return Header; }
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StringRef getCurrent() const { return Current; }
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StringRef getPrefix() const {
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if (Current.begin() == Header.begin())
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return StringRef();
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return Header.slice(0, Current.begin() - Header.begin() - 1);
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}
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StringRef getSuffix() const {
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if (Current.end() == Header.end())
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return StringRef();
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return Header.slice(Current.end() - Header.begin() + 1, StringRef::npos);
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}
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/// \brief Get the current field as a number.
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///
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/// Convert the current field into a number. Return \c 0 on error.
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template <class T> T getNumber() const {
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T Int;
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if (getCurrent().getAsInteger(0, Int))
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return 0;
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return Int;
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}
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private:
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void increment() {
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assert(Current.data() != nullptr && "Cannot increment past the end");
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StringRef Suffix = getSuffix();
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Current = Suffix.slice(0, Suffix.find('\0'));
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}
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};
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/// \brief A thin wraper around MDNode to access encoded debug info.
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///
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/// This should not be stored in a container, because the underlying MDNode may
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/// change in certain situations.
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class DIDescriptor {
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// Befriends DIRef so DIRef can befriend the protected member
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// function: getFieldAs<DIRef>.
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template <typename T> friend class DIRef;
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public:
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/// \brief Accessibility flags.
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///
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/// The three accessibility flags are mutually exclusive and rolled together
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/// in the first two bits.
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enum {
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FlagAccessibility = 1 << 0 | 1 << 1,
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FlagPrivate = 1,
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FlagProtected = 2,
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FlagPublic = 3,
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FlagFwdDecl = 1 << 2,
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FlagAppleBlock = 1 << 3,
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FlagBlockByrefStruct = 1 << 4,
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FlagVirtual = 1 << 5,
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FlagArtificial = 1 << 6,
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FlagExplicit = 1 << 7,
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FlagPrototyped = 1 << 8,
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FlagObjcClassComplete = 1 << 9,
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FlagObjectPointer = 1 << 10,
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FlagVector = 1 << 11,
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FlagStaticMember = 1 << 12,
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FlagLValueReference = 1 << 13,
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FlagRValueReference = 1 << 14
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};
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protected:
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const MDNode *DbgNode;
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StringRef getStringField(unsigned Elt) const;
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unsigned getUnsignedField(unsigned Elt) const {
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return (unsigned)getUInt64Field(Elt);
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}
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uint64_t getUInt64Field(unsigned Elt) const;
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int64_t getInt64Field(unsigned Elt) const;
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DIDescriptor getDescriptorField(unsigned Elt) const;
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template <typename DescTy> DescTy getFieldAs(unsigned Elt) const {
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return DescTy(getDescriptorField(Elt));
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}
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GlobalVariable *getGlobalVariableField(unsigned Elt) const;
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Constant *getConstantField(unsigned Elt) const;
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Function *getFunctionField(unsigned Elt) const;
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void replaceFunctionField(unsigned Elt, Function *F);
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public:
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explicit DIDescriptor(const MDNode *N = nullptr) : DbgNode(N) {}
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bool Verify() const;
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MDNode *get() const { return const_cast<MDNode *>(DbgNode); }
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operator MDNode *() const { return get(); }
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MDNode *operator->() const { return get(); }
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// An explicit operator bool so that we can do testing of DI values
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// easily.
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// FIXME: This operator bool isn't actually protecting anything at the
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// moment due to the conversion operator above making DIDescriptor nodes
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// implicitly convertable to bool.
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LLVM_EXPLICIT operator bool() const { return DbgNode != nullptr; }
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bool operator==(DIDescriptor Other) const { return DbgNode == Other.DbgNode; }
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bool operator!=(DIDescriptor Other) const { return !operator==(Other); }
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StringRef getHeader() const { return getStringField(0); }
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size_t getNumHeaderFields() const {
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return std::distance(DIHeaderFieldIterator(getHeader()),
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DIHeaderFieldIterator());
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}
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DIHeaderFieldIterator header_begin() const {
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return DIHeaderFieldIterator(getHeader());
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}
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DIHeaderFieldIterator header_end() const { return DIHeaderFieldIterator(); }
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DIHeaderFieldIterator getHeaderIterator(unsigned Index) const {
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// Since callers expect an empty string for out-of-range accesses, we can't
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// use std::advance() here.
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for (auto I = header_begin(), E = header_end(); I != E; ++I, --Index)
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if (!Index)
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return I;
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return header_end();
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}
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StringRef getHeaderField(unsigned Index) const {
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return *getHeaderIterator(Index);
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}
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template <class T> T getHeaderFieldAs(unsigned Index) const {
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return getHeaderIterator(Index).getNumber<T>();
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}
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uint16_t getTag() const { return getHeaderFieldAs<uint16_t>(0); }
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bool isDerivedType() const;
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bool isCompositeType() const;
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bool isSubroutineType() const;
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bool isBasicType() const;
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bool isVariable() const;
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bool isSubprogram() const;
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bool isGlobalVariable() const;
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bool isScope() const;
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bool isFile() const;
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bool isCompileUnit() const;
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bool isNameSpace() const;
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bool isLexicalBlockFile() const;
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bool isLexicalBlock() const;
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bool isSubrange() const;
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bool isEnumerator() const;
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bool isType() const;
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bool isTemplateTypeParameter() const;
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bool isTemplateValueParameter() const;
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bool isObjCProperty() const;
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bool isImportedEntity() const;
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bool isExpression() const;
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void print(raw_ostream &OS) const;
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void dump() const;
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/// \brief Replace all uses of debug info referenced by this descriptor.
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void replaceAllUsesWith(LLVMContext &VMContext, DIDescriptor D);
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void replaceAllUsesWith(MDNode *D);
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};
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/// \brief This is used to represent ranges, for array bounds.
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class DISubrange : public DIDescriptor {
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friend class DIDescriptor;
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void printInternal(raw_ostream &OS) const;
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public:
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explicit DISubrange(const MDNode *N = nullptr) : DIDescriptor(N) {}
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int64_t getLo() const { return getHeaderFieldAs<int64_t>(1); }
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int64_t getCount() const { return getHeaderFieldAs<int64_t>(2); }
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bool Verify() const;
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};
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/// \brief This descriptor holds an array of nodes with type T.
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template <typename T> class DITypedArray : public DIDescriptor {
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public:
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explicit DITypedArray(const MDNode *N = nullptr) : DIDescriptor(N) {}
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unsigned getNumElements() const {
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return DbgNode ? DbgNode->getNumOperands() : 0;
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}
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T getElement(unsigned Idx) const { return getFieldAs<T>(Idx); }
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};
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typedef DITypedArray<DIDescriptor> DIArray;
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/// \brief A wrapper for an enumerator (e.g. X and Y in 'enum {X,Y}').
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///
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/// FIXME: it seems strange that this doesn't have either a reference to the
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/// type/precision or a file/line pair for location info.
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class DIEnumerator : public DIDescriptor {
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friend class DIDescriptor;
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void printInternal(raw_ostream &OS) const;
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public:
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explicit DIEnumerator(const MDNode *N = nullptr) : DIDescriptor(N) {}
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StringRef getName() const { return getHeaderField(1); }
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int64_t getEnumValue() const { return getHeaderFieldAs<int64_t>(2); }
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bool Verify() const;
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};
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template <typename T> class DIRef;
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typedef DIRef<DIScope> DIScopeRef;
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typedef DIRef<DIType> DITypeRef;
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typedef DITypedArray<DITypeRef> DITypeArray;
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/// \brief A base class for various scopes.
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///
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/// Although, implementation-wise, DIScope is the parent class of most
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/// other DIxxx classes, including DIType and its descendants, most of
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/// DIScope's descendants are not a substitutable subtype of
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/// DIScope. The DIDescriptor::isScope() method only is true for
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/// DIScopes that are scopes in the strict lexical scope sense
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/// (DICompileUnit, DISubprogram, etc.), but not for, e.g., a DIType.
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class DIScope : public DIDescriptor {
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protected:
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friend class DIDescriptor;
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void printInternal(raw_ostream &OS) const;
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public:
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explicit DIScope(const MDNode *N = nullptr) : DIDescriptor(N) {}
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/// \brief Get the parent scope.
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///
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/// Gets the parent scope for this scope node or returns a default
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/// constructed scope.
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DIScopeRef getContext() const;
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/// \brief Get the scope name.
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///
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/// If the scope node has a name, return that, else return an empty string.
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StringRef getName() const;
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StringRef getFilename() const;
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StringRef getDirectory() const;
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/// \brief Generate a reference to this DIScope.
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///
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/// Uses the type identifier instead of the actual MDNode if possible, to
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/// help type uniquing.
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DIScopeRef getRef() const;
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};
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/// \brief Represents reference to a DIDescriptor.
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///
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/// Abstracts over direct and identifier-based metadata references.
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template <typename T> class DIRef {
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template <typename DescTy>
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friend DescTy DIDescriptor::getFieldAs(unsigned Elt) const;
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friend DIScopeRef DIScope::getContext() const;
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friend DIScopeRef DIScope::getRef() const;
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friend class DIType;
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/// \brief Val can be either a MDNode or a MDString.
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///
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/// In the latter, MDString specifies the type identifier.
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const Metadata *Val;
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explicit DIRef(const Metadata *V);
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public:
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T resolve(const DITypeIdentifierMap &Map) const;
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StringRef getName() const;
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operator Metadata *() const { return const_cast<Metadata *>(Val); }
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};
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template <typename T>
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T DIRef<T>::resolve(const DITypeIdentifierMap &Map) const {
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if (!Val)
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return T();
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if (const MDNode *MD = dyn_cast<MDNode>(Val))
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return T(MD);
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const MDString *MS = cast<MDString>(Val);
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// Find the corresponding MDNode.
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DITypeIdentifierMap::const_iterator Iter = Map.find(MS);
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assert(Iter != Map.end() && "Identifier not in the type map?");
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assert(DIDescriptor(Iter->second).isType() &&
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"MDNode in DITypeIdentifierMap should be a DIType.");
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return T(Iter->second);
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}
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template <typename T> StringRef DIRef<T>::getName() const {
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if (!Val)
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return StringRef();
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if (const MDNode *MD = dyn_cast<MDNode>(Val))
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return T(MD).getName();
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const MDString *MS = cast<MDString>(Val);
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return MS->getString();
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}
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/// \brief Handle fields that are references to DIScopes.
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template <> DIScopeRef DIDescriptor::getFieldAs<DIScopeRef>(unsigned Elt) const;
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/// \brief Specialize DIRef constructor for DIScopeRef.
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template <> DIRef<DIScope>::DIRef(const Metadata *V);
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/// \brief Handle fields that are references to DITypes.
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template <> DITypeRef DIDescriptor::getFieldAs<DITypeRef>(unsigned Elt) const;
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/// \brief Specialize DIRef constructor for DITypeRef.
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template <> DIRef<DIType>::DIRef(const Metadata *V);
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/// \brief This is a wrapper for a type.
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///
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/// FIXME: Types should be factored much better so that CV qualifiers and
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/// others do not require a huge and empty descriptor full of zeros.
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class DIType : public DIScope {
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protected:
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friend class DIDescriptor;
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void printInternal(raw_ostream &OS) const;
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public:
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explicit DIType(const MDNode *N = nullptr) : DIScope(N) {}
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operator DITypeRef() const {
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assert(isType() &&
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"constructing DITypeRef from an MDNode that is not a type");
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return DITypeRef(&*getRef());
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}
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bool Verify() const;
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DIScopeRef getContext() const { return getFieldAs<DIScopeRef>(2); }
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StringRef getName() const { return getHeaderField(1); }
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unsigned getLineNumber() const { return getHeaderFieldAs<unsigned>(2); }
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uint64_t getSizeInBits() const { return getHeaderFieldAs<unsigned>(3); }
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uint64_t getAlignInBits() const { return getHeaderFieldAs<unsigned>(4); }
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// FIXME: Offset is only used for DW_TAG_member nodes. Making every type
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// carry this is just plain insane.
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uint64_t getOffsetInBits() const { return getHeaderFieldAs<unsigned>(5); }
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unsigned getFlags() const { return getHeaderFieldAs<unsigned>(6); }
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bool isPrivate() const {
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return (getFlags() & FlagAccessibility) == FlagPrivate;
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}
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bool isProtected() const {
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return (getFlags() & FlagAccessibility) == FlagProtected;
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}
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bool isPublic() const {
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return (getFlags() & FlagAccessibility) == FlagPublic;
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}
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bool isForwardDecl() const { return (getFlags() & FlagFwdDecl) != 0; }
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bool isAppleBlockExtension() const {
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return (getFlags() & FlagAppleBlock) != 0;
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}
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bool isBlockByrefStruct() const {
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return (getFlags() & FlagBlockByrefStruct) != 0;
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}
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bool isVirtual() const { return (getFlags() & FlagVirtual) != 0; }
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bool isArtificial() const { return (getFlags() & FlagArtificial) != 0; }
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bool isObjectPointer() const { return (getFlags() & FlagObjectPointer) != 0; }
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bool isObjcClassComplete() const {
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return (getFlags() & FlagObjcClassComplete) != 0;
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}
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bool isVector() const { return (getFlags() & FlagVector) != 0; }
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bool isStaticMember() const { return (getFlags() & FlagStaticMember) != 0; }
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bool isLValueReference() const {
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return (getFlags() & FlagLValueReference) != 0;
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}
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bool isRValueReference() const {
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return (getFlags() & FlagRValueReference) != 0;
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}
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bool isValid() const { return DbgNode && isType(); }
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};
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/// \brief A basic type, like 'int' or 'float'.
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class DIBasicType : public DIType {
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public:
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explicit DIBasicType(const MDNode *N = nullptr) : DIType(N) {}
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unsigned getEncoding() const { return getHeaderFieldAs<unsigned>(7); }
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bool Verify() const;
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};
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/// \brief A simple derived type
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///
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/// Like a const qualified type, a typedef, a pointer or reference, et cetera.
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/// Or, a data member of a class/struct/union.
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class DIDerivedType : public DIType {
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friend class DIDescriptor;
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void printInternal(raw_ostream &OS) const;
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public:
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explicit DIDerivedType(const MDNode *N = nullptr) : DIType(N) {}
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DITypeRef getTypeDerivedFrom() const { return getFieldAs<DITypeRef>(3); }
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/// \brief Return property node, if this ivar is associated with one.
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MDNode *getObjCProperty() const;
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DITypeRef getClassType() const {
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assert(getTag() == dwarf::DW_TAG_ptr_to_member_type);
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return getFieldAs<DITypeRef>(4);
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}
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Constant *getConstant() const {
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assert((getTag() == dwarf::DW_TAG_member) && isStaticMember());
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return getConstantField(4);
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}
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bool Verify() const;
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};
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/// \brief Types that refer to multiple other types.
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///
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/// This descriptor holds a type that can refer to multiple other types, like a
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/// function or struct.
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///
|
|
/// DICompositeType is derived from DIDerivedType because some
|
|
/// composite types (such as enums) can be derived from basic types
|
|
// FIXME: Make this derive from DIType directly & just store the
|
|
// base type in a single DIType field.
|
|
class DICompositeType : public DIDerivedType {
|
|
friend class DIBuilder;
|
|
friend class DIDescriptor;
|
|
void printInternal(raw_ostream &OS) const;
|
|
|
|
/// \brief Set the array of member DITypes.
|
|
void setArraysHelper(MDNode *Elements, MDNode *TParams);
|
|
|
|
public:
|
|
explicit DICompositeType(const MDNode *N = nullptr) : DIDerivedType(N) {}
|
|
|
|
DIArray getElements() const {
|
|
assert(!isSubroutineType() && "no elements for DISubroutineType");
|
|
return getFieldAs<DIArray>(4);
|
|
}
|
|
|
|
private:
|
|
template <typename T>
|
|
void setArrays(DITypedArray<T> Elements, DIArray TParams = DIArray()) {
|
|
assert(
|
|
(!TParams || DbgNode->getNumOperands() == 8) &&
|
|
"If you're setting the template parameters this should include a slot "
|
|
"for that!");
|
|
setArraysHelper(Elements, TParams);
|
|
}
|
|
|
|
public:
|
|
unsigned getRunTimeLang() const { return getHeaderFieldAs<unsigned>(7); }
|
|
DITypeRef getContainingType() const { return getFieldAs<DITypeRef>(5); }
|
|
|
|
private:
|
|
/// \brief Set the containing type.
|
|
void setContainingType(DICompositeType ContainingType);
|
|
|
|
public:
|
|
DIArray getTemplateParams() const { return getFieldAs<DIArray>(6); }
|
|
MDString *getIdentifier() const;
|
|
|
|
bool Verify() const;
|
|
};
|
|
|
|
class DISubroutineType : public DICompositeType {
|
|
public:
|
|
explicit DISubroutineType(const MDNode *N = nullptr) : DICompositeType(N) {}
|
|
DITypedArray<DITypeRef> getTypeArray() const {
|
|
return getFieldAs<DITypedArray<DITypeRef>>(4);
|
|
}
|
|
};
|
|
|
|
/// \brief This is a wrapper for a file.
|
|
class DIFile : public DIScope {
|
|
friend class DIDescriptor;
|
|
|
|
public:
|
|
explicit DIFile(const MDNode *N = nullptr) : DIScope(N) {}
|
|
|
|
/// \brief Retrieve the MDNode for the directory/file pair.
|
|
MDNode *getFileNode() const;
|
|
bool Verify() const;
|
|
};
|
|
|
|
/// \brief A wrapper for a compile unit.
|
|
class DICompileUnit : public DIScope {
|
|
friend class DIDescriptor;
|
|
void printInternal(raw_ostream &OS) const;
|
|
|
|
public:
|
|
explicit DICompileUnit(const MDNode *N = nullptr) : DIScope(N) {}
|
|
|
|
dwarf::SourceLanguage getLanguage() const {
|
|
return static_cast<dwarf::SourceLanguage>(getHeaderFieldAs<unsigned>(1));
|
|
}
|
|
StringRef getProducer() const { return getHeaderField(2); }
|
|
|
|
bool isOptimized() const { return getHeaderFieldAs<bool>(3) != 0; }
|
|
StringRef getFlags() const { return getHeaderField(4); }
|
|
unsigned getRunTimeVersion() const { return getHeaderFieldAs<unsigned>(5); }
|
|
|
|
DIArray getEnumTypes() const;
|
|
DIArray getRetainedTypes() const;
|
|
DIArray getSubprograms() const;
|
|
DIArray getGlobalVariables() const;
|
|
DIArray getImportedEntities() const;
|
|
|
|
void replaceSubprograms(DIArray Subprograms);
|
|
void replaceGlobalVariables(DIArray GlobalVariables);
|
|
|
|
StringRef getSplitDebugFilename() const { return getHeaderField(6); }
|
|
unsigned getEmissionKind() const { return getHeaderFieldAs<unsigned>(7); }
|
|
|
|
bool Verify() const;
|
|
};
|
|
|
|
/// \brief This is a wrapper for a subprogram (e.g. a function).
|
|
class DISubprogram : public DIScope {
|
|
friend class DIDescriptor;
|
|
void printInternal(raw_ostream &OS) const;
|
|
|
|
public:
|
|
explicit DISubprogram(const MDNode *N = nullptr) : DIScope(N) {}
|
|
|
|
StringRef getName() const { return getHeaderField(1); }
|
|
StringRef getDisplayName() const { return getHeaderField(2); }
|
|
StringRef getLinkageName() const { return getHeaderField(3); }
|
|
unsigned getLineNumber() const { return getHeaderFieldAs<unsigned>(4); }
|
|
|
|
/// \brief Check if this is local (like 'static' in C).
|
|
unsigned isLocalToUnit() const { return getHeaderFieldAs<unsigned>(5); }
|
|
unsigned isDefinition() const { return getHeaderFieldAs<unsigned>(6); }
|
|
|
|
unsigned getVirtuality() const { return getHeaderFieldAs<unsigned>(7); }
|
|
unsigned getVirtualIndex() const { return getHeaderFieldAs<unsigned>(8); }
|
|
|
|
unsigned getFlags() const { return getHeaderFieldAs<unsigned>(9); }
|
|
|
|
unsigned isOptimized() const { return getHeaderFieldAs<bool>(10); }
|
|
|
|
/// \brief Get the beginning of the scope of the function (not the name).
|
|
unsigned getScopeLineNumber() const { return getHeaderFieldAs<unsigned>(11); }
|
|
|
|
DIScopeRef getContext() const { return getFieldAs<DIScopeRef>(2); }
|
|
DISubroutineType getType() const { return getFieldAs<DISubroutineType>(3); }
|
|
|
|
DITypeRef getContainingType() const { return getFieldAs<DITypeRef>(4); }
|
|
|
|
bool Verify() const;
|
|
|
|
/// \brief Check if this provides debugging information for the function F.
|
|
bool describes(const Function *F);
|
|
|
|
Function *getFunction() const { return getFunctionField(5); }
|
|
void replaceFunction(Function *F) { replaceFunctionField(5, F); }
|
|
DIArray getTemplateParams() const { return getFieldAs<DIArray>(6); }
|
|
DISubprogram getFunctionDeclaration() const {
|
|
return getFieldAs<DISubprogram>(7);
|
|
}
|
|
MDNode *getVariablesNodes() const;
|
|
DIArray getVariables() const;
|
|
|
|
unsigned isArtificial() const { return (getFlags() & FlagArtificial) != 0; }
|
|
/// \brief Check for the "private" access specifier.
|
|
bool isPrivate() const {
|
|
return (getFlags() & FlagAccessibility) == FlagPrivate;
|
|
}
|
|
/// \brief Check for the "protected" access specifier.
|
|
bool isProtected() const {
|
|
return (getFlags() & FlagAccessibility) == FlagProtected;
|
|
}
|
|
/// \brief Check for the "public" access specifier.
|
|
bool isPublic() const {
|
|
return (getFlags() & FlagAccessibility) == FlagPublic;
|
|
}
|
|
/// \brief Check for "explicit".
|
|
bool isExplicit() const { return (getFlags() & FlagExplicit) != 0; }
|
|
/// \brief Check if this is prototyped.
|
|
bool isPrototyped() const { return (getFlags() & FlagPrototyped) != 0; }
|
|
|
|
/// \brief Check if this is reference-qualified.
|
|
///
|
|
/// Return true if this subprogram is a C++11 reference-qualified non-static
|
|
/// member function (void foo() &).
|
|
unsigned isLValueReference() const {
|
|
return (getFlags() & FlagLValueReference) != 0;
|
|
}
|
|
|
|
/// \brief Check if this is rvalue-reference-qualified.
|
|
///
|
|
/// Return true if this subprogram is a C++11 rvalue-reference-qualified
|
|
/// non-static member function (void foo() &&).
|
|
unsigned isRValueReference() const {
|
|
return (getFlags() & FlagRValueReference) != 0;
|
|
}
|
|
};
|
|
|
|
/// \brief This is a wrapper for a lexical block.
|
|
class DILexicalBlock : public DIScope {
|
|
public:
|
|
explicit DILexicalBlock(const MDNode *N = nullptr) : DIScope(N) {}
|
|
DIScope getContext() const { return getFieldAs<DIScope>(2); }
|
|
unsigned getLineNumber() const { return getHeaderFieldAs<unsigned>(1); }
|
|
unsigned getColumnNumber() const { return getHeaderFieldAs<unsigned>(2); }
|
|
bool Verify() const;
|
|
};
|
|
|
|
/// \brief This is a wrapper for a lexical block with a filename change.
|
|
class DILexicalBlockFile : public DIScope {
|
|
public:
|
|
explicit DILexicalBlockFile(const MDNode *N = nullptr) : DIScope(N) {}
|
|
DIScope getContext() const {
|
|
// FIXME: This logic is horrible. getScope() returns a DILexicalBlock, but
|
|
// then we check if it's a subprogram? WHAT?!?
|
|
if (getScope().isSubprogram())
|
|
return getScope();
|
|
return getScope().getContext();
|
|
}
|
|
unsigned getLineNumber() const { return getScope().getLineNumber(); }
|
|
unsigned getColumnNumber() const { return getScope().getColumnNumber(); }
|
|
DILexicalBlock getScope() const { return getFieldAs<DILexicalBlock>(2); }
|
|
unsigned getDiscriminator() const { return getHeaderFieldAs<unsigned>(1); }
|
|
bool Verify() const;
|
|
};
|
|
|
|
/// \brief A wrapper for a C++ style name space.
|
|
class DINameSpace : public DIScope {
|
|
friend class DIDescriptor;
|
|
void printInternal(raw_ostream &OS) const;
|
|
|
|
public:
|
|
explicit DINameSpace(const MDNode *N = nullptr) : DIScope(N) {}
|
|
StringRef getName() const { return getHeaderField(1); }
|
|
unsigned getLineNumber() const { return getHeaderFieldAs<unsigned>(2); }
|
|
DIScope getContext() const { return getFieldAs<DIScope>(2); }
|
|
bool Verify() const;
|
|
};
|
|
|
|
/// \brief This is a wrapper for template type parameter.
|
|
class DITemplateTypeParameter : public DIDescriptor {
|
|
public:
|
|
explicit DITemplateTypeParameter(const MDNode *N = nullptr)
|
|
: DIDescriptor(N) {}
|
|
|
|
StringRef getName() const { return getHeaderField(1); }
|
|
|
|
DIScopeRef getContext() const { return getFieldAs<DIScopeRef>(1); }
|
|
DITypeRef getType() const { return getFieldAs<DITypeRef>(2); }
|
|
bool Verify() const;
|
|
};
|
|
|
|
/// \brief This is a wrapper for template value parameter.
|
|
class DITemplateValueParameter : public DIDescriptor {
|
|
public:
|
|
explicit DITemplateValueParameter(const MDNode *N = nullptr)
|
|
: DIDescriptor(N) {}
|
|
|
|
StringRef getName() const { return getHeaderField(1); }
|
|
|
|
DIScopeRef getContext() const { return getFieldAs<DIScopeRef>(1); }
|
|
DITypeRef getType() const { return getFieldAs<DITypeRef>(2); }
|
|
Metadata *getValue() const;
|
|
bool Verify() const;
|
|
};
|
|
|
|
/// \brief This is a wrapper for a global variable.
|
|
class DIGlobalVariable : public DIDescriptor {
|
|
friend class DIDescriptor;
|
|
void printInternal(raw_ostream &OS) const;
|
|
|
|
public:
|
|
explicit DIGlobalVariable(const MDNode *N = nullptr) : DIDescriptor(N) {}
|
|
|
|
StringRef getName() const { return getHeaderField(1); }
|
|
StringRef getDisplayName() const { return getHeaderField(2); }
|
|
StringRef getLinkageName() const { return getHeaderField(3); }
|
|
unsigned getLineNumber() const { return getHeaderFieldAs<unsigned>(4); }
|
|
unsigned isLocalToUnit() const { return getHeaderFieldAs<bool>(5); }
|
|
unsigned isDefinition() const { return getHeaderFieldAs<bool>(6); }
|
|
|
|
DIScope getContext() const { return getFieldAs<DIScope>(1); }
|
|
StringRef getFilename() const { return getFieldAs<DIFile>(2).getFilename(); }
|
|
StringRef getDirectory() const {
|
|
return getFieldAs<DIFile>(2).getDirectory();
|
|
}
|
|
DITypeRef getType() const { return getFieldAs<DITypeRef>(3); }
|
|
|
|
GlobalVariable *getGlobal() const { return getGlobalVariableField(4); }
|
|
Constant *getConstant() const { return getConstantField(4); }
|
|
DIDerivedType getStaticDataMemberDeclaration() const {
|
|
return getFieldAs<DIDerivedType>(5);
|
|
}
|
|
|
|
bool Verify() const;
|
|
};
|
|
|
|
/// \brief This is a wrapper for a variable (e.g. parameter, local, global etc).
|
|
class DIVariable : public DIDescriptor {
|
|
friend class DIDescriptor;
|
|
void printInternal(raw_ostream &OS) const;
|
|
|
|
public:
|
|
explicit DIVariable(const MDNode *N = nullptr) : DIDescriptor(N) {}
|
|
|
|
StringRef getName() const { return getHeaderField(1); }
|
|
unsigned getLineNumber() const {
|
|
// FIXME: Line number and arg number shouldn't be merged together like this.
|
|
return (getHeaderFieldAs<unsigned>(2) << 8) >> 8;
|
|
}
|
|
unsigned getArgNumber() const { return getHeaderFieldAs<unsigned>(2) >> 24; }
|
|
|
|
DIScope getContext() const { return getFieldAs<DIScope>(1); }
|
|
DIFile getFile() const { return getFieldAs<DIFile>(2); }
|
|
DITypeRef getType() const { return getFieldAs<DITypeRef>(3); }
|
|
|
|
/// \brief Return true if this variable is marked as "artificial".
|
|
bool isArtificial() const {
|
|
return (getHeaderFieldAs<unsigned>(3) & FlagArtificial) != 0;
|
|
}
|
|
|
|
bool isObjectPointer() const {
|
|
return (getHeaderFieldAs<unsigned>(3) & FlagObjectPointer) != 0;
|
|
}
|
|
|
|
/// \brief If this variable is inlined then return inline location.
|
|
MDNode *getInlinedAt() const;
|
|
|
|
bool Verify() const;
|
|
|
|
/// \brief Check if this is a "__block" variable (Apple Blocks).
|
|
bool isBlockByrefVariable(const DITypeIdentifierMap &Map) const {
|
|
return (getType().resolve(Map)).isBlockByrefStruct();
|
|
}
|
|
|
|
/// \brief Check if this is an inlined function argument.
|
|
bool isInlinedFnArgument(const Function *CurFn);
|
|
|
|
/// \brief Return the size reported by the variable's type.
|
|
unsigned getSizeInBits(const DITypeIdentifierMap &Map);
|
|
|
|
void printExtendedName(raw_ostream &OS) const;
|
|
};
|
|
|
|
/// \brief A complex location expression in postfix notation.
|
|
///
|
|
/// This is (almost) a DWARF expression that modifies the location of a
|
|
/// variable or (or the location of a single piece of a variable).
|
|
///
|
|
/// FIXME: Instead of DW_OP_plus taking an argument, this should use DW_OP_const
|
|
/// and have DW_OP_plus consume the topmost elements on the stack.
|
|
class DIExpression : public DIDescriptor {
|
|
friend class DIDescriptor;
|
|
void printInternal(raw_ostream &OS) const;
|
|
|
|
public:
|
|
explicit DIExpression(const MDNode *N = nullptr) : DIDescriptor(N) {}
|
|
|
|
bool Verify() const;
|
|
|
|
/// \brief Return the number of elements in the complex expression.
|
|
unsigned getNumElements() const {
|
|
if (!DbgNode)
|
|
return 0;
|
|
unsigned N = getNumHeaderFields();
|
|
assert(N > 0 && "missing tag");
|
|
return N - 1;
|
|
}
|
|
|
|
/// \brief return the Idx'th complex address element.
|
|
uint64_t getElement(unsigned Idx) const;
|
|
|
|
/// \brief Return whether this is a piece of an aggregate variable.
|
|
bool isBitPiece() const;
|
|
/// \brief Return the offset of this piece in bits.
|
|
uint64_t getBitPieceOffset() const;
|
|
/// \brief Return the size of this piece in bits.
|
|
uint64_t getBitPieceSize() const;
|
|
|
|
class iterator;
|
|
/// \brief A lightweight wrapper around an element of a DIExpression.
|
|
class Operand {
|
|
friend class iterator;
|
|
DIHeaderFieldIterator I;
|
|
Operand() {}
|
|
Operand(DIHeaderFieldIterator I) : I(I) {}
|
|
public:
|
|
/// \brief Operands such as DW_OP_piece have explicit (non-stack) arguments.
|
|
/// Argument 0 is the operand itself.
|
|
uint64_t getArg(unsigned N) const {
|
|
DIHeaderFieldIterator In = I;
|
|
std::advance(In, N);
|
|
return In.getNumber<uint64_t>();
|
|
}
|
|
operator uint64_t () const { return I.getNumber<uint64_t>(); }
|
|
/// \brief Returns underlying DIHeaderFieldIterator.
|
|
const DIHeaderFieldIterator &getBase() const { return I; }
|
|
/// \brief Returns the next operand.
|
|
Operand getNext() const;
|
|
};
|
|
|
|
/// \brief An iterator for DIExpression elements.
|
|
class iterator : public std::iterator<std::input_iterator_tag, StringRef,
|
|
unsigned, const Operand*, Operand> {
|
|
friend class Operand;
|
|
DIHeaderFieldIterator I;
|
|
Operand Tmp;
|
|
iterator(DIHeaderFieldIterator I) : I(I) {}
|
|
public:
|
|
iterator() {}
|
|
iterator(const DIExpression &Expr) : I(++Expr.header_begin()) {}
|
|
const Operand &operator*() { return Tmp = Operand(I); }
|
|
const Operand *operator->() { return &(Tmp = Operand(I)); }
|
|
iterator &operator++() {
|
|
increment();
|
|
return *this;
|
|
}
|
|
iterator operator++(int) {
|
|
iterator X(*this);
|
|
increment();
|
|
return X;
|
|
}
|
|
bool operator==(const iterator &X) const { return I == X.I; }
|
|
bool operator!=(const iterator &X) const { return !(*this == X); }
|
|
|
|
private:
|
|
void increment() {
|
|
switch (**this) {
|
|
case dwarf::DW_OP_bit_piece: std::advance(I, 3); break;
|
|
case dwarf::DW_OP_plus: std::advance(I, 2); break;
|
|
case dwarf::DW_OP_deref: std::advance(I, 1); break;
|
|
default:
|
|
llvm_unreachable("unsupported operand");
|
|
}
|
|
}
|
|
};
|
|
|
|
iterator begin() const;
|
|
iterator end() const;
|
|
};
|
|
|
|
/// \brief This object holds location information.
|
|
///
|
|
/// This object is not associated with any DWARF tag.
|
|
class DILocation : public DIDescriptor {
|
|
public:
|
|
explicit DILocation(const MDNode *N) : DIDescriptor(N) {}
|
|
|
|
unsigned getLineNumber() const {
|
|
if (auto *L = dyn_cast_or_null<MDLocation>(DbgNode))
|
|
return L->getLine();
|
|
return 0;
|
|
}
|
|
unsigned getColumnNumber() const {
|
|
if (auto *L = dyn_cast_or_null<MDLocation>(DbgNode))
|
|
return L->getColumn();
|
|
return 0;
|
|
}
|
|
DIScope getScope() const {
|
|
if (auto *L = dyn_cast_or_null<MDLocation>(DbgNode))
|
|
return DIScope(dyn_cast_or_null<MDNode>(L->getScope()));
|
|
return DIScope(nullptr);
|
|
}
|
|
DILocation getOrigLocation() const {
|
|
if (auto *L = dyn_cast_or_null<MDLocation>(DbgNode))
|
|
return DILocation(dyn_cast_or_null<MDNode>(L->getInlinedAt()));
|
|
return DILocation(nullptr);
|
|
}
|
|
StringRef getFilename() const { return getScope().getFilename(); }
|
|
StringRef getDirectory() const { return getScope().getDirectory(); }
|
|
bool Verify() const;
|
|
bool atSameLineAs(const DILocation &Other) const {
|
|
return (getLineNumber() == Other.getLineNumber() &&
|
|
getFilename() == Other.getFilename());
|
|
}
|
|
/// \brief Get the DWAF discriminator.
|
|
///
|
|
/// DWARF discriminators are used to distinguish identical file locations for
|
|
/// instructions that are on different basic blocks. If two instructions are
|
|
/// inside the same lexical block and are in different basic blocks, we
|
|
/// create a new lexical block with identical location as the original but
|
|
/// with a different discriminator value
|
|
/// (lib/Transforms/Util/AddDiscriminators.cpp for details).
|
|
unsigned getDiscriminator() const {
|
|
// Since discriminators are associated with lexical blocks, make
|
|
// sure this location is a lexical block before retrieving its
|
|
// value.
|
|
return getScope().isLexicalBlockFile()
|
|
? DILexicalBlockFile(
|
|
cast<MDNode>(cast<MDLocation>(DbgNode)->getScope()))
|
|
.getDiscriminator()
|
|
: 0;
|
|
}
|
|
|
|
/// \brief Generate a new discriminator value for this location.
|
|
unsigned computeNewDiscriminator(LLVMContext &Ctx);
|
|
|
|
/// \brief Return a copy of this location with a different scope.
|
|
DILocation copyWithNewScope(LLVMContext &Ctx, DILexicalBlockFile NewScope);
|
|
};
|
|
|
|
class DIObjCProperty : public DIDescriptor {
|
|
friend class DIDescriptor;
|
|
void printInternal(raw_ostream &OS) const;
|
|
|
|
public:
|
|
explicit DIObjCProperty(const MDNode *N) : DIDescriptor(N) {}
|
|
|
|
StringRef getObjCPropertyName() const { return getHeaderField(1); }
|
|
DIFile getFile() const { return getFieldAs<DIFile>(1); }
|
|
unsigned getLineNumber() const { return getHeaderFieldAs<unsigned>(2); }
|
|
|
|
StringRef getObjCPropertyGetterName() const { return getHeaderField(3); }
|
|
StringRef getObjCPropertySetterName() const { return getHeaderField(4); }
|
|
unsigned getAttributes() const { return getHeaderFieldAs<unsigned>(5); }
|
|
bool isReadOnlyObjCProperty() const {
|
|
return (getAttributes() & dwarf::DW_APPLE_PROPERTY_readonly) != 0;
|
|
}
|
|
bool isReadWriteObjCProperty() const {
|
|
return (getAttributes() & dwarf::DW_APPLE_PROPERTY_readwrite) != 0;
|
|
}
|
|
bool isAssignObjCProperty() const {
|
|
return (getAttributes() & dwarf::DW_APPLE_PROPERTY_assign) != 0;
|
|
}
|
|
bool isRetainObjCProperty() const {
|
|
return (getAttributes() & dwarf::DW_APPLE_PROPERTY_retain) != 0;
|
|
}
|
|
bool isCopyObjCProperty() const {
|
|
return (getAttributes() & dwarf::DW_APPLE_PROPERTY_copy) != 0;
|
|
}
|
|
bool isNonAtomicObjCProperty() const {
|
|
return (getAttributes() & dwarf::DW_APPLE_PROPERTY_nonatomic) != 0;
|
|
}
|
|
|
|
/// \brief Get the type.
|
|
///
|
|
/// \note Objective-C doesn't have an ODR, so there is no benefit in storing
|
|
/// the type as a DITypeRef here.
|
|
DIType getType() const { return getFieldAs<DIType>(2); }
|
|
|
|
bool Verify() const;
|
|
};
|
|
|
|
/// \brief An imported module (C++ using directive or similar).
|
|
class DIImportedEntity : public DIDescriptor {
|
|
friend class DIDescriptor;
|
|
void printInternal(raw_ostream &OS) const;
|
|
|
|
public:
|
|
explicit DIImportedEntity(const MDNode *N) : DIDescriptor(N) {}
|
|
DIScope getContext() const { return getFieldAs<DIScope>(1); }
|
|
DIScopeRef getEntity() const { return getFieldAs<DIScopeRef>(2); }
|
|
unsigned getLineNumber() const { return getHeaderFieldAs<unsigned>(1); }
|
|
StringRef getName() const { return getHeaderField(2); }
|
|
bool Verify() const;
|
|
};
|
|
|
|
/// \brief Find subprogram that is enclosing this scope.
|
|
DISubprogram getDISubprogram(const MDNode *Scope);
|
|
|
|
/// \brief Find debug info for a given function.
|
|
/// \returns a valid DISubprogram, if found. Otherwise, it returns an empty
|
|
/// DISubprogram.
|
|
DISubprogram getDISubprogram(const Function *F);
|
|
|
|
/// \brief Find underlying composite type.
|
|
DICompositeType getDICompositeType(DIType T);
|
|
|
|
/// \brief Create a new inlined variable based on current variable.
|
|
///
|
|
/// @param DV Current Variable.
|
|
/// @param InlinedScope Location at current variable is inlined.
|
|
DIVariable createInlinedVariable(MDNode *DV, MDNode *InlinedScope,
|
|
LLVMContext &VMContext);
|
|
|
|
/// \brief Remove inlined scope from the variable.
|
|
DIVariable cleanseInlinedVariable(MDNode *DV, LLVMContext &VMContext);
|
|
|
|
/// \brief Generate map by visiting all retained types.
|
|
DITypeIdentifierMap generateDITypeIdentifierMap(const NamedMDNode *CU_Nodes);
|
|
|
|
/// \brief Strip debug info in the module if it exists.
|
|
///
|
|
/// To do this, we remove all calls to the debugger intrinsics and any named
|
|
/// metadata for debugging. We also remove debug locations for instructions.
|
|
/// Return true if module is modified.
|
|
bool StripDebugInfo(Module &M);
|
|
|
|
/// \brief Return Debug Info Metadata Version by checking module flags.
|
|
unsigned getDebugMetadataVersionFromModule(const Module &M);
|
|
|
|
/// \brief Utility to find all debug info in a module.
|
|
///
|
|
/// DebugInfoFinder tries to list all debug info MDNodes used in a module. To
|
|
/// list debug info MDNodes used by an instruction, DebugInfoFinder uses
|
|
/// processDeclare, processValue and processLocation to handle DbgDeclareInst,
|
|
/// DbgValueInst and DbgLoc attached to instructions. processModule will go
|
|
/// through all DICompileUnits in llvm.dbg.cu and list debug info MDNodes
|
|
/// used by the CUs.
|
|
class DebugInfoFinder {
|
|
public:
|
|
DebugInfoFinder() : TypeMapInitialized(false) {}
|
|
|
|
/// \brief Process entire module and collect debug info anchors.
|
|
void processModule(const Module &M);
|
|
|
|
/// \brief Process DbgDeclareInst.
|
|
void processDeclare(const Module &M, const DbgDeclareInst *DDI);
|
|
/// \brief Process DbgValueInst.
|
|
void processValue(const Module &M, const DbgValueInst *DVI);
|
|
/// \brief Process DILocation.
|
|
void processLocation(const Module &M, DILocation Loc);
|
|
|
|
/// \brief Process DIExpression.
|
|
void processExpression(DIExpression Expr);
|
|
|
|
/// \brief Clear all lists.
|
|
void reset();
|
|
|
|
private:
|
|
void InitializeTypeMap(const Module &M);
|
|
|
|
void processType(DIType DT);
|
|
void processSubprogram(DISubprogram SP);
|
|
void processScope(DIScope Scope);
|
|
bool addCompileUnit(DICompileUnit CU);
|
|
bool addGlobalVariable(DIGlobalVariable DIG);
|
|
bool addSubprogram(DISubprogram SP);
|
|
bool addType(DIType DT);
|
|
bool addScope(DIScope Scope);
|
|
|
|
public:
|
|
typedef SmallVectorImpl<DICompileUnit>::const_iterator compile_unit_iterator;
|
|
typedef SmallVectorImpl<DISubprogram>::const_iterator subprogram_iterator;
|
|
typedef SmallVectorImpl<DIGlobalVariable>::const_iterator
|
|
global_variable_iterator;
|
|
typedef SmallVectorImpl<DIType>::const_iterator type_iterator;
|
|
typedef SmallVectorImpl<DIScope>::const_iterator scope_iterator;
|
|
|
|
iterator_range<compile_unit_iterator> compile_units() const {
|
|
return iterator_range<compile_unit_iterator>(CUs.begin(), CUs.end());
|
|
}
|
|
|
|
iterator_range<subprogram_iterator> subprograms() const {
|
|
return iterator_range<subprogram_iterator>(SPs.begin(), SPs.end());
|
|
}
|
|
|
|
iterator_range<global_variable_iterator> global_variables() const {
|
|
return iterator_range<global_variable_iterator>(GVs.begin(), GVs.end());
|
|
}
|
|
|
|
iterator_range<type_iterator> types() const {
|
|
return iterator_range<type_iterator>(TYs.begin(), TYs.end());
|
|
}
|
|
|
|
iterator_range<scope_iterator> scopes() const {
|
|
return iterator_range<scope_iterator>(Scopes.begin(), Scopes.end());
|
|
}
|
|
|
|
unsigned compile_unit_count() const { return CUs.size(); }
|
|
unsigned global_variable_count() const { return GVs.size(); }
|
|
unsigned subprogram_count() const { return SPs.size(); }
|
|
unsigned type_count() const { return TYs.size(); }
|
|
unsigned scope_count() const { return Scopes.size(); }
|
|
|
|
private:
|
|
SmallVector<DICompileUnit, 8> CUs;
|
|
SmallVector<DISubprogram, 8> SPs;
|
|
SmallVector<DIGlobalVariable, 8> GVs;
|
|
SmallVector<DIType, 8> TYs;
|
|
SmallVector<DIScope, 8> Scopes;
|
|
SmallPtrSet<MDNode *, 64> NodesSeen;
|
|
DITypeIdentifierMap TypeIdentifierMap;
|
|
|
|
/// \brief Specify if TypeIdentifierMap is initialized.
|
|
bool TypeMapInitialized;
|
|
};
|
|
|
|
DenseMap<const Function *, DISubprogram> makeSubprogramMap(const Module &M);
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif
|