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//===-- DWARFDebugInfoEntry.h -----------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_DEBUGINFO_DWARFDEBUGINFOENTRY_H
#define LLVM_DEBUGINFO_DWARFDEBUGINFOENTRY_H
#include "DWARFAbbreviationDeclaration.h"
#include "llvm/Support/DataTypes.h"
namespace llvm {
class DWARFDebugAranges;
class DWARFCompileUnit;
class DWARFContext;
class DWARFFormValue;
/// DWARFDebugInfoEntryMinimal - A DIE with only the minimum required data.
class DWARFDebugInfoEntryMinimal {
/// Offset within the .debug_info of the start of this entry.
uint32_t Offset;
/// How many to subtract from "this" to get the parent.
/// If zero this die has no parent.
uint32_t ParentIdx;
/// How many to add to "this" to get the sibling.
uint32_t SiblingIdx;
const DWARFAbbreviationDeclaration *AbbrevDecl;
public:
DWARFDebugInfoEntryMinimal()
: Offset(0), ParentIdx(0), SiblingIdx(0), AbbrevDecl(0) {}
void dump(raw_ostream &OS, const DWARFCompileUnit *cu,
unsigned recurseDepth, unsigned indent = 0) const;
void dumpAttribute(raw_ostream &OS, const DWARFCompileUnit *cu,
uint32_t *offset_ptr, uint16_t attr, uint16_t form,
unsigned indent = 0) const;
bool extractFast(const DWARFCompileUnit *cu, const uint8_t *fixed_form_sizes,
uint32_t *offset_ptr);
/// Extract a debug info entry for a given compile unit from the
/// .debug_info and .debug_abbrev data starting at the given offset.
bool extract(const DWARFCompileUnit *cu, uint32_t *offset_ptr);
uint32_t getTag() const { return AbbrevDecl ? AbbrevDecl->getTag() : 0; }
bool isNULL() const { return AbbrevDecl == 0; }
uint32_t getOffset() const { return Offset; }
uint32_t getNumAttributes() const {
return !isNULL() ? AbbrevDecl->getNumAttributes() : 0;
}
bool hasChildren() const { return !isNULL() && AbbrevDecl->hasChildren(); }
// We know we are kept in a vector of contiguous entries, so we know
// our parent will be some index behind "this".
DWARFDebugInfoEntryMinimal *getParent() {
return ParentIdx > 0 ? this - ParentIdx : 0;
}
const DWARFDebugInfoEntryMinimal *getParent() const {
return ParentIdx > 0 ? this - ParentIdx : 0;
}
// We know we are kept in a vector of contiguous entries, so we know
// our sibling will be some index after "this".
DWARFDebugInfoEntryMinimal *getSibling() {
return SiblingIdx > 0 ? this + SiblingIdx : 0;
}
const DWARFDebugInfoEntryMinimal *getSibling() const {
return SiblingIdx > 0 ? this + SiblingIdx : 0;
}
// We know we are kept in a vector of contiguous entries, so we know
// we don't need to store our child pointer, if we have a child it will
// be the next entry in the list...
DWARFDebugInfoEntryMinimal *getFirstChild() {
return hasChildren() ? this + 1 : 0;
}
const DWARFDebugInfoEntryMinimal *getFirstChild() const {
return hasChildren() ? this + 1 : 0;
}
void setParent(DWARFDebugInfoEntryMinimal *parent) {
if (parent) {
// We know we are kept in a vector of contiguous entries, so we know
// our parent will be some index behind "this".
ParentIdx = this - parent;
} else
ParentIdx = 0;
}
void setSibling(DWARFDebugInfoEntryMinimal *sibling) {
if (sibling) {
// We know we are kept in a vector of contiguous entries, so we know
// our sibling will be some index after "this".
SiblingIdx = sibling - this;
sibling->setParent(getParent());
} else
SiblingIdx = 0;
}
const DWARFAbbreviationDeclaration *getAbbreviationDeclarationPtr() const {
return AbbrevDecl;
}
uint32_t getAttributeValue(const DWARFCompileUnit *cu,
const uint16_t attr, DWARFFormValue &formValue,
uint32_t *end_attr_offset_ptr = 0) const;
const char* getAttributeValueAsString(const DWARFCompileUnit* cu,
const uint16_t attr,
const char *fail_value) const;
uint64_t getAttributeValueAsUnsigned(const DWARFCompileUnit *cu,
const uint16_t attr,
uint64_t fail_value) const;
uint64_t getAttributeValueAsReference(const DWARFCompileUnit *cu,
const uint16_t attr,
uint64_t fail_value) const;
int64_t getAttributeValueAsSigned(const DWARFCompileUnit* cu,
const uint16_t attr,
int64_t fail_value) const;
void buildAddressRangeTable(const DWARFCompileUnit *cu,
DWARFDebugAranges *debug_aranges) const;
bool addressRangeContainsAddress(const DWARFCompileUnit *cu,
const uint64_t address) const;
// If a DIE represents a subroutine, returns its mangled name
// (or short name, if mangled is missing). Otherwise returns null.
const char* getSubprogramName(const DWARFCompileUnit *cu) const;
};
}
#endif
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