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Switch all DWARF variables for tags, attributes and forms over to use the llvm::dwarf enumerations instead of using raw uint16_t values. This allows easier debugging as users can see the values of the enumerations in the variables view that will show the enumeration string instead of just a number.

Browse Source 
https://reviews.llvm.org/D26013

llvm-svn: 285309
This commit is contained in:
Greg Clayton 2016-10-27 16:32:04 +00:00
parent ecb41605f5
commit c59e887dd6
12 changed files with 89 additions and 69 deletions
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19
include/llvm/DebugInfo/DWARF/DWARFAbbreviationDeclaration.h
View File

@ -12,6 +12,7 @@
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/DataExtractor.h"
#include "llvm/Support/Dwarf.h"
namespace llvm {
@ -20,16 +21,16 @@ class raw_ostream;
class DWARFAbbreviationDeclaration {
public:
struct AttributeSpec {
AttributeSpec(uint16_t Attr, uint16_t Form) : Attr(Attr), Form(Form) {}
uint16_t Attr;
uint16_t Form;
AttributeSpec(dwarf::Attribute A, dwarf::Form F) : Attr(A), Form(F) {}
dwarf::Attribute Attr;
dwarf::Form Form;
};
typedef SmallVector<AttributeSpec, 8> AttributeSpecVector;
DWARFAbbreviationDeclaration();
uint32_t getCode() const { return Code; }
uint32_t getTag() const { return Tag; }
dwarf::Tag getTag() const { return Tag; }
bool hasChildren() const { return HasChildren; }
typedef iterator_range<AttributeSpecVector::const_iterator>
@ -39,11 +40,13 @@ public:
return attr_iterator_range(AttributeSpecs.begin(), AttributeSpecs.end());
}
uint16_t getFormByIndex(uint32_t idx) const {
return idx < AttributeSpecs.size() ? AttributeSpecs[idx].Form : 0;
dwarf::Form getFormByIndex(uint32_t idx) const {
if (idx < AttributeSpecs.size())
return AttributeSpecs[idx].Form;
return dwarf::Form(0);
}
uint32_t findAttributeIndex(uint16_t attr) const;
uint32_t findAttributeIndex(dwarf::Attribute attr) const;
bool extract(DataExtractor Data, uint32_t* OffsetPtr);
void dump(raw_ostream &OS) const;
@ -51,7 +54,7 @@ private:
void clear();
uint32_t Code;
uint32_t Tag;
dwarf::Tag Tag;
bool HasChildren;
AttributeSpecVector AttributeSpecs;

3
include/llvm/DebugInfo/DWARF/DWARFAcceleratorTable.h
View File

@ -13,6 +13,7 @@
#include "llvm/ADT/SmallVector.h"
#include "llvm/DebugInfo/DWARF/DWARFFormValue.h"
#include "llvm/DebugInfo/DWARF/DWARFRelocMap.h"
#include "llvm/Support/Dwarf.h"
#include <cstdint>
namespace llvm {
@ -30,7 +31,7 @@ class DWARFAcceleratorTable {
struct HeaderData {
typedef uint16_t AtomType;
typedef uint16_t Form;
typedef dwarf::Form Form;
uint32_t DIEOffsetBase;
SmallVector<std::pair<AtomType, Form>, 3> Atoms;
};

18
include/llvm/DebugInfo/DWARF/DWARFDebugInfoEntry.h
View File

@ -41,7 +41,8 @@ public:
void dump(raw_ostream &OS, DWARFUnit *u, unsigned recurseDepth,
unsigned indent = 0) const;
void dumpAttribute(raw_ostream &OS, DWARFUnit *u, uint32_t *offset_ptr,
uint16_t attr, uint16_t form, unsigned indent = 0) const;
dwarf::Attribute attr, dwarf::Form form,
unsigned indent = 0) const;
/// Extracts a debug info entry, which is a child of a given unit,
/// starting at a given offset. If DIE can't be extracted, returns false and
@ -86,24 +87,27 @@ public:
return AbbrevDecl;
}
bool getAttributeValue(const DWARFUnit *U, const uint16_t Attr,
bool getAttributeValue(const DWARFUnit *U, dwarf::Attribute Attr,
DWARFFormValue &FormValue) const;
const char *getAttributeValueAsString(const DWARFUnit *U, const uint16_t Attr,
const char *getAttributeValueAsString(const DWARFUnit *U,
dwarf::Attribute Attr,
const char *FailValue) const;
uint64_t getAttributeValueAsAddress(const DWARFUnit *U, const uint16_t Attr,
uint64_t getAttributeValueAsAddress(const DWARFUnit *U,
dwarf::Attribute Attr,
uint64_t FailValue) const;
uint64_t getAttributeValueAsUnsignedConstant(const DWARFUnit *U,
const uint16_t Attr,
dwarf::Attribute Attr,
uint64_t FailValue) const;
uint64_t getAttributeValueAsReference(const DWARFUnit *U, const uint16_t Attr,
uint64_t getAttributeValueAsReference(const DWARFUnit *U,
dwarf::Attribute Attr,
uint64_t FailValue) const;
uint64_t getAttributeValueAsSectionOffset(const DWARFUnit *U,
const uint16_t Attr,
dwarf::Attribute Attr,
uint64_t FailValue) const;
uint64_t getRangesBaseAttribute(const DWARFUnit *U, uint64_t FailValue) const;

11
include/llvm/DebugInfo/DWARF/DWARFFormValue.h
View File

@ -12,6 +12,7 @@
#include "llvm/ADT/Optional.h"
#include "llvm/Support/DataExtractor.h"
#include "llvm/Support/Dwarf.h"
namespace llvm {
@ -48,12 +49,12 @@ private:
const uint8_t* data;
};
uint16_t Form; // Form for this value.
dwarf::Form Form; // Form for this value.
ValueType Value; // Contains all data for the form.
public:
DWARFFormValue(uint16_t Form = 0) : Form(Form) {}
uint16_t getForm() const { return Form; }
DWARFFormValue(dwarf::Form F = dwarf::Form(0)) : Form(F) {}
dwarf::Form getForm() const { return Form; }
bool isFormClass(FormClass FC) const;
void dump(raw_ostream &OS, const DWARFUnit *U) const;
@ -82,9 +83,9 @@ public:
bool skipValue(DataExtractor debug_info_data, uint32_t *offset_ptr,
const DWARFUnit *u) const;
static bool skipValue(uint16_t form, DataExtractor debug_info_data,
static bool skipValue(dwarf::Form form, DataExtractor debug_info_data,
uint32_t *offset_ptr, const DWARFUnit *u);
static bool skipValue(uint16_t form, DataExtractor debug_info_data,
static bool skipValue(dwarf::Form form, DataExtractor debug_info_data,
uint32_t *offset_ptr, uint16_t Version,
uint8_t AddrSize);

2
include/llvm/Support/Dwarf.def
View File

@ -42,7 +42,7 @@
#define HANDLE_DW_CC(ID, NAME)
#endif
HANDLE_DW_TAG(0x0000, null)
HANDLE_DW_TAG(0x0001, array_type)
HANDLE_DW_TAG(0x0002, class_type)
HANDLE_DW_TAG(0x0003, entry_point)

3
include/llvm/Support/Dwarf.h
View File

@ -312,7 +312,8 @@ enum Form : uint16_t {
DW_FORM_exprloc = 0x18,
DW_FORM_flag_present = 0x19,
DW_FORM_ref_sig8 = 0x20,
DW_FORM_lo_user = 0x1f00,
// Extensions for Fission proposal
DW_FORM_GNU_addr_index = 0x1f01,
DW_FORM_GNU_str_index = 0x1f02,

47
lib/DebugInfo/DWARF/DWARFAbbreviationDeclaration.cpp
View File

@ -16,7 +16,7 @@ using namespace dwarf;
void DWARFAbbreviationDeclaration::clear() {
Code = 0;
Tag = 0;
Tag = DW_TAG_null;
HasChildren = false;
AttributeSpecs.clear();
}
@ -26,37 +26,38 @@ DWARFAbbreviationDeclaration::DWARFAbbreviationDeclaration() {
}
bool
DWARFAbbreviationDeclaration::extract(DataExtractor Data, uint32_t* OffsetPtr) {
DWARFAbbreviationDeclaration::extract(DataExtractor Data,
uint32_t* OffsetPtr) {
clear();
Code = Data.getULEB128(OffsetPtr);
if (Code == 0) {
return false;
}
Tag = Data.getULEB128(OffsetPtr);
Tag = static_cast<llvm::dwarf::Tag>(Data.getULEB128(OffsetPtr));
if (Tag == DW_TAG_null) {
clear();
return false;
}
uint8_t ChildrenByte = Data.getU8(OffsetPtr);
HasChildren = (ChildrenByte == DW_CHILDREN_yes);
while (true) {
uint32_t CurOffset = *OffsetPtr;
uint16_t Attr = Data.getULEB128(OffsetPtr);
if (CurOffset == *OffsetPtr) {
clear();
return false;
}
CurOffset = *OffsetPtr;
uint16_t Form = Data.getULEB128(OffsetPtr);
if (CurOffset == *OffsetPtr) {
clear();
return false;
}
if (Attr == 0 && Form == 0)
auto A = static_cast<Attribute>(Data.getULEB128(OffsetPtr));
auto F = static_cast<Form>(Data.getULEB128(OffsetPtr));
if (A && F) {
AttributeSpecs.push_back(AttributeSpec(A, F));
} else if (A == 0 && F == 0) {
// We successfully reached the end of this abbreviation declaration
// since both attribute and form are zero.
break;
AttributeSpecs.push_back(AttributeSpec(Attr, Form));
}
if (Tag == 0) {
clear();
return false;
} else {
// Attribute and form pairs must either both be non-zero, in which case
// they are added to the abbreviation declaration, or both be zero to
// terminate the abbrevation declaration. In this case only one was
// zero which is an error.
clear();
return false;
}
}
return true;
}
@ -88,7 +89,7 @@ void DWARFAbbreviationDeclaration::dump(raw_ostream &OS) const {
}
uint32_t
DWARFAbbreviationDeclaration::findAttributeIndex(uint16_t attr) const {
DWARFAbbreviationDeclaration::findAttributeIndex(dwarf::Attribute attr) const {
for (uint32_t i = 0, e = AttributeSpecs.size(); i != e; ++i) {
if (AttributeSpecs[i].Attr == attr)
return i;

2
lib/DebugInfo/DWARF/DWARFAcceleratorTable.cpp
View File

@ -39,7 +39,7 @@ bool DWARFAcceleratorTable::extract() {
for (unsigned i = 0; i < NumAtoms; ++i) {
uint16_t AtomType = AccelSection.getU16(&Offset);
uint16_t AtomForm = AccelSection.getU16(&Offset);
auto AtomForm = static_cast<dwarf::Form>(AccelSection.getU16(&Offset));
HdrData.Atoms.push_back(std::make_pair(AtomType, AtomForm));
}

24
lib/DebugInfo/DWARF/DWARFDebugInfoEntry.cpp
View File

@ -112,7 +112,8 @@ static void dumpRanges(raw_ostream &OS, const DWARFAddressRangesVector& Ranges,
void DWARFDebugInfoEntryMinimal::dumpAttribute(raw_ostream &OS,
DWARFUnit *u,
uint32_t *offset_ptr,
uint16_t attr, uint16_t form,
dwarf::Attribute attr,
dwarf::Form form,
unsigned indent) const {
const char BaseIndent[] = " ";
OS << BaseIndent;
@ -207,7 +208,7 @@ bool DWARFDebugInfoEntryMinimal::extractFast(const DWARFUnit *U,
// Skip all data in the .debug_info for the attributes
for (const auto &AttrSpec : AbbrevDecl->attributes()) {
uint16_t Form = AttrSpec.Form;
auto Form = AttrSpec.Form;
uint8_t FixedFormSize =
(Form < FixedFormSizes.size()) ? FixedFormSizes[Form] : 0;
@ -232,8 +233,8 @@ bool DWARFDebugInfoEntryMinimal::isSubroutineDIE() const {
Tag == DW_TAG_inlined_subroutine;
}
bool DWARFDebugInfoEntryMinimal::getAttributeValue(
const DWARFUnit *U, const uint16_t Attr, DWARFFormValue &FormValue) const {
bool DWARFDebugInfoEntryMinimal::getAttributeValue(const DWARFUnit *U,
dwarf::Attribute Attr, DWARFFormValue &FormValue) const {
if (!AbbrevDecl)
return false;
@ -258,7 +259,8 @@ bool DWARFDebugInfoEntryMinimal::getAttributeValue(
}
const char *DWARFDebugInfoEntryMinimal::getAttributeValueAsString(
const DWARFUnit *U, const uint16_t Attr, const char *FailValue) const {
const DWARFUnit *U, dwarf::Attribute Attr,
const char *FailValue) const {
DWARFFormValue FormValue;
if (!getAttributeValue(U, Attr, FormValue))
return FailValue;
@ -267,7 +269,8 @@ const char *DWARFDebugInfoEntryMinimal::getAttributeValueAsString(
}
uint64_t DWARFDebugInfoEntryMinimal::getAttributeValueAsAddress(
const DWARFUnit *U, const uint16_t Attr, uint64_t FailValue) const {
const DWARFUnit *U, dwarf::Attribute Attr,
uint64_t FailValue) const {
DWARFFormValue FormValue;
if (!getAttributeValue(U, Attr, FormValue))
return FailValue;
@ -276,7 +279,8 @@ uint64_t DWARFDebugInfoEntryMinimal::getAttributeValueAsAddress(
}
uint64_t DWARFDebugInfoEntryMinimal::getAttributeValueAsUnsignedConstant(
const DWARFUnit *U, const uint16_t Attr, uint64_t FailValue) const {
const DWARFUnit *U, dwarf::Attribute Attr,
uint64_t FailValue) const {
DWARFFormValue FormValue;
if (!getAttributeValue(U, Attr, FormValue))
return FailValue;
@ -285,7 +289,8 @@ uint64_t DWARFDebugInfoEntryMinimal::getAttributeValueAsUnsignedConstant(
}
uint64_t DWARFDebugInfoEntryMinimal::getAttributeValueAsReference(
const DWARFUnit *U, const uint16_t Attr, uint64_t FailValue) const {
const DWARFUnit *U, dwarf::Attribute Attr,
uint64_t FailValue) const {
DWARFFormValue FormValue;
if (!getAttributeValue(U, Attr, FormValue))
return FailValue;
@ -294,7 +299,8 @@ uint64_t DWARFDebugInfoEntryMinimal::getAttributeValueAsReference(
}
uint64_t DWARFDebugInfoEntryMinimal::getAttributeValueAsSectionOffset(
const DWARFUnit *U, const uint16_t Attr, uint64_t FailValue) const {
const DWARFUnit *U, dwarf::Attribute Attr,
uint64_t FailValue) const {
DWARFFormValue FormValue;
if (!getAttributeValue(U, Attr, FormValue))
return FailValue;

15
lib/DebugInfo/DWARF/DWARFFormValue.cpp
View File

@ -123,6 +123,8 @@ bool DWARFFormValue::isFormClass(DWARFFormValue::FormClass FC) const {
case DW_FORM_GNU_str_index:
case DW_FORM_GNU_strp_alt:
return (FC == FC_String);
default:
break;
}
// In DWARF3 DW_FORM_data4 and DW_FORM_data8 served also as a section offset.
// Don't check for DWARF version here, as some producers may still do this
@ -208,7 +210,7 @@ bool DWARFFormValue::extractValue(DataExtractor data, uint32_t *offset_ptr,
Value.cstr = data.getCStr(offset_ptr);
break;
case DW_FORM_indirect:
Form = data.getULEB128(offset_ptr);
Form = static_cast<dwarf::Form>(data.getULEB128(offset_ptr));
indirect = true;
break;
case DW_FORM_sec_offset:
@ -259,14 +261,15 @@ DWARFFormValue::skipValue(DataExtractor debug_info_data, uint32_t* offset_ptr,
}
bool
DWARFFormValue::skipValue(uint16_t form, DataExtractor debug_info_data,
DWARFFormValue::skipValue(dwarf::Form form, DataExtractor debug_info_data,
uint32_t *offset_ptr, const DWARFUnit *cu) {
return skipValue(form, debug_info_data, offset_ptr, cu->getVersion(),
cu->getAddressByteSize());
}
bool DWARFFormValue::skipValue(uint16_t form, DataExtractor debug_info_data,
uint32_t *offset_ptr, uint16_t Version,
uint8_t AddrSize) {
bool
DWARFFormValue::skipValue(dwarf::Form form, DataExtractor debug_info_data,
uint32_t *offset_ptr, uint16_t Version,
uint8_t AddrSize) {
bool indirect = false;
do {
switch (form) {
@ -349,7 +352,7 @@ bool DWARFFormValue::skipValue(uint16_t form, DataExtractor debug_info_data,
case DW_FORM_indirect:
indirect = true;
form = debug_info_data.getULEB128(offset_ptr);
form = static_cast<dwarf::Form>(debug_info_data.getULEB128(offset_ptr));
break;
// FIXME: 4 for DWARF32, 8 for DWARF64.

10
tools/llvm-dwp/llvm-dwp.cpp
View File

@ -112,8 +112,8 @@ struct CompileUnitIdentifiers {
};
static Expected<const char *>
getIndexedString(uint32_t Form, DataExtractor InfoData, uint32_t &InfoOffset,
StringRef StrOffsets, StringRef Str) {
getIndexedString(dwarf::Form Form, DataExtractor InfoData,
uint32_t &InfoOffset, StringRef StrOffsets, StringRef Str) {
if (Form == dwarf::DW_FORM_string)
return InfoData.getCStr(&InfoOffset);
if (Form != dwarf::DW_FORM_GNU_str_index)
@ -142,16 +142,16 @@ static Expected<CompileUnitIdentifiers> getCUIdentifiers(StringRef Abbrev,
DataExtractor AbbrevData(Abbrev, true, 0);
uint32_t AbbrevOffset = getCUAbbrev(Abbrev, AbbrCode);
uint64_t Tag = AbbrevData.getULEB128(&AbbrevOffset);
auto Tag = static_cast<dwarf::Tag>(AbbrevData.getULEB128(&AbbrevOffset));
if (Tag != dwarf::DW_TAG_compile_unit)
return make_error<DWPError>("top level DIE is not a compile unit");
// DW_CHILDREN
AbbrevData.getU8(&AbbrevOffset);
uint32_t Name;
uint32_t Form;
dwarf::Form Form;
CompileUnitIdentifiers ID;
while ((Name = AbbrevData.getULEB128(&AbbrevOffset)) |
(Form = AbbrevData.getULEB128(&AbbrevOffset)) &&
(Form = static_cast<dwarf::Form>(AbbrevData.getULEB128(&AbbrevOffset))) &&
(Name != 0 || Form != 0)) {
switch (Name) {
case dwarf::DW_AT_name: {

4
unittests/DebugInfo/DWARF/DWARFFormValueTest.cpp
View File

@ -33,7 +33,7 @@ TEST(DWARFFormValue, FixedFormSizes) {
EXPECT_EQ(0U, DWARFFormValue::getFixedFormSizes(16, 2).size());
}
bool isFormClass(uint16_t Form, DWARFFormValue::FormClass FC) {
bool isFormClass(dwarf::Form Form, DWARFFormValue::FormClass FC) {
return DWARFFormValue(Form).isFormClass(FC);
}
@ -52,7 +52,7 @@ TEST(DWARFFormValue, FormClass) {
}
template<typename RawTypeT>
DWARFFormValue createDataXFormValue(uint16_t Form, RawTypeT Value) {
DWARFFormValue createDataXFormValue(dwarf::Form Form, RawTypeT Value) {
char Raw[sizeof(RawTypeT)];
memcpy(Raw, &Value, sizeof(RawTypeT));
uint32_t Offset = 0;