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