mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-28 19:31:58 +00:00
dd8e9f395e
proposal. This leaves the strings in the skeleton die as strp, but in all dwo files they're accessed now via DW_FORM_GNU_str_index. Add support for dumping these sections and modify the fission-cu.ll testcase to have the correct strings and form. Fix a small bug in the fixed form sizes routine that involved out of array accesses for the table and add a FIXME in the extractFast routine to fix this up. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171779 91177308-0d34-0410-b5e6-96231b3b80d8
449 lines
16 KiB
C++
449 lines
16 KiB
C++
//===-- DWARFContext.cpp --------------------------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "DWARFContext.h"
|
|
#include "llvm/ADT/SmallString.h"
|
|
#include "llvm/Support/Dwarf.h"
|
|
#include "llvm/Support/Format.h"
|
|
#include "llvm/Support/Path.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include <algorithm>
|
|
using namespace llvm;
|
|
using namespace dwarf;
|
|
|
|
typedef DWARFDebugLine::LineTable DWARFLineTable;
|
|
|
|
void DWARFContext::dump(raw_ostream &OS) {
|
|
OS << ".debug_abbrev contents:\n";
|
|
getDebugAbbrev()->dump(OS);
|
|
|
|
OS << "\n.debug_info contents:\n";
|
|
for (unsigned i = 0, e = getNumCompileUnits(); i != e; ++i)
|
|
getCompileUnitAtIndex(i)->dump(OS);
|
|
|
|
OS << "\n.debug_aranges contents:\n";
|
|
DataExtractor arangesData(getARangeSection(), isLittleEndian(), 0);
|
|
uint32_t offset = 0;
|
|
DWARFDebugArangeSet set;
|
|
while (set.extract(arangesData, &offset))
|
|
set.dump(OS);
|
|
|
|
uint8_t savedAddressByteSize = 0;
|
|
OS << "\n.debug_line contents:\n";
|
|
for (unsigned i = 0, e = getNumCompileUnits(); i != e; ++i) {
|
|
DWARFCompileUnit *cu = getCompileUnitAtIndex(i);
|
|
savedAddressByteSize = cu->getAddressByteSize();
|
|
unsigned stmtOffset =
|
|
cu->getCompileUnitDIE()->getAttributeValueAsUnsigned(cu, DW_AT_stmt_list,
|
|
-1U);
|
|
if (stmtOffset != -1U) {
|
|
DataExtractor lineData(getLineSection(), isLittleEndian(),
|
|
savedAddressByteSize);
|
|
DWARFDebugLine::DumpingState state(OS);
|
|
DWARFDebugLine::parseStatementTable(lineData, &stmtOffset, state);
|
|
}
|
|
}
|
|
|
|
OS << "\n.debug_str contents:\n";
|
|
DataExtractor strData(getStringSection(), isLittleEndian(), 0);
|
|
offset = 0;
|
|
uint32_t strOffset = 0;
|
|
while (const char *s = strData.getCStr(&offset)) {
|
|
OS << format("0x%8.8x: \"%s\"\n", strOffset, s);
|
|
strOffset = offset;
|
|
}
|
|
|
|
OS << "\n.debug_ranges contents:\n";
|
|
// In fact, different compile units may have different address byte
|
|
// sizes, but for simplicity we just use the address byte size of the last
|
|
// compile unit (there is no easy and fast way to associate address range
|
|
// list and the compile unit it describes).
|
|
DataExtractor rangesData(getRangeSection(), isLittleEndian(),
|
|
savedAddressByteSize);
|
|
offset = 0;
|
|
DWARFDebugRangeList rangeList;
|
|
while (rangeList.extract(rangesData, &offset))
|
|
rangeList.dump(OS);
|
|
|
|
OS << "\n.debug_abbrev.dwo contents:\n";
|
|
getDebugAbbrevDWO()->dump(OS);
|
|
|
|
OS << "\n.debug_info.dwo contents:\n";
|
|
for (unsigned i = 0, e = getNumDWOCompileUnits(); i != e; ++i)
|
|
getDWOCompileUnitAtIndex(i)->dump(OS);
|
|
|
|
OS << "\n.debug_str.dwo contents:\n";
|
|
DataExtractor strDWOData(getStringDWOSection(), isLittleEndian(), 0);
|
|
offset = 0;
|
|
uint32_t strDWOOffset = 0;
|
|
while (const char *s = strDWOData.getCStr(&offset)) {
|
|
OS << format("0x%8.8x: \"%s\"\n", strDWOOffset, s);
|
|
strDWOOffset = offset;
|
|
}
|
|
}
|
|
|
|
const DWARFDebugAbbrev *DWARFContext::getDebugAbbrev() {
|
|
if (Abbrev)
|
|
return Abbrev.get();
|
|
|
|
DataExtractor abbrData(getAbbrevSection(), isLittleEndian(), 0);
|
|
|
|
Abbrev.reset(new DWARFDebugAbbrev());
|
|
Abbrev->parse(abbrData);
|
|
return Abbrev.get();
|
|
}
|
|
|
|
const DWARFDebugAbbrev *DWARFContext::getDebugAbbrevDWO() {
|
|
if (AbbrevDWO)
|
|
return AbbrevDWO.get();
|
|
|
|
DataExtractor abbrData(getAbbrevDWOSection(), isLittleEndian(), 0);
|
|
AbbrevDWO.reset(new DWARFDebugAbbrev());
|
|
AbbrevDWO->parse(abbrData);
|
|
return AbbrevDWO.get();
|
|
}
|
|
|
|
const DWARFDebugAranges *DWARFContext::getDebugAranges() {
|
|
if (Aranges)
|
|
return Aranges.get();
|
|
|
|
DataExtractor arangesData(getARangeSection(), isLittleEndian(), 0);
|
|
|
|
Aranges.reset(new DWARFDebugAranges());
|
|
Aranges->extract(arangesData);
|
|
// Generate aranges from DIEs: even if .debug_aranges section is present,
|
|
// it may describe only a small subset of compilation units, so we need to
|
|
// manually build aranges for the rest of them.
|
|
Aranges->generate(this);
|
|
return Aranges.get();
|
|
}
|
|
|
|
const DWARFLineTable *
|
|
DWARFContext::getLineTableForCompileUnit(DWARFCompileUnit *cu) {
|
|
if (!Line)
|
|
Line.reset(new DWARFDebugLine());
|
|
|
|
unsigned stmtOffset =
|
|
cu->getCompileUnitDIE()->getAttributeValueAsUnsigned(cu, DW_AT_stmt_list,
|
|
-1U);
|
|
if (stmtOffset == -1U)
|
|
return 0; // No line table for this compile unit.
|
|
|
|
// See if the line table is cached.
|
|
if (const DWARFLineTable *lt = Line->getLineTable(stmtOffset))
|
|
return lt;
|
|
|
|
// We have to parse it first.
|
|
DataExtractor lineData(getLineSection(), isLittleEndian(),
|
|
cu->getAddressByteSize());
|
|
return Line->getOrParseLineTable(lineData, stmtOffset);
|
|
}
|
|
|
|
void DWARFContext::parseCompileUnits() {
|
|
uint32_t offset = 0;
|
|
const DataExtractor &DIData = DataExtractor(getInfoSection(),
|
|
isLittleEndian(), 0);
|
|
while (DIData.isValidOffset(offset)) {
|
|
CUs.push_back(DWARFCompileUnit(getDebugAbbrev(), getInfoSection(),
|
|
getAbbrevSection(), getRangeSection(),
|
|
getStringSection(), "",
|
|
&infoRelocMap(),
|
|
isLittleEndian()));
|
|
if (!CUs.back().extract(DIData, &offset)) {
|
|
CUs.pop_back();
|
|
break;
|
|
}
|
|
|
|
offset = CUs.back().getNextCompileUnitOffset();
|
|
}
|
|
}
|
|
|
|
void DWARFContext::parseDWOCompileUnits() {
|
|
uint32_t offset = 0;
|
|
const DataExtractor &DIData = DataExtractor(getInfoDWOSection(),
|
|
isLittleEndian(), 0);
|
|
while (DIData.isValidOffset(offset)) {
|
|
DWOCUs.push_back(DWARFCompileUnit(getDebugAbbrevDWO(), getInfoDWOSection(),
|
|
getAbbrevDWOSection(),
|
|
getRangeDWOSection(),
|
|
getStringDWOSection(),
|
|
getStringOffsetDWOSection(),
|
|
&infoDWORelocMap(),
|
|
isLittleEndian()));
|
|
if (!DWOCUs.back().extract(DIData, &offset)) {
|
|
DWOCUs.pop_back();
|
|
break;
|
|
}
|
|
|
|
offset = DWOCUs.back().getNextCompileUnitOffset();
|
|
}
|
|
}
|
|
|
|
namespace {
|
|
struct OffsetComparator {
|
|
bool operator()(const DWARFCompileUnit &LHS,
|
|
const DWARFCompileUnit &RHS) const {
|
|
return LHS.getOffset() < RHS.getOffset();
|
|
}
|
|
bool operator()(const DWARFCompileUnit &LHS, uint32_t RHS) const {
|
|
return LHS.getOffset() < RHS;
|
|
}
|
|
bool operator()(uint32_t LHS, const DWARFCompileUnit &RHS) const {
|
|
return LHS < RHS.getOffset();
|
|
}
|
|
};
|
|
}
|
|
|
|
DWARFCompileUnit *DWARFContext::getCompileUnitForOffset(uint32_t Offset) {
|
|
if (CUs.empty())
|
|
parseCompileUnits();
|
|
|
|
DWARFCompileUnit *CU = std::lower_bound(CUs.begin(), CUs.end(), Offset,
|
|
OffsetComparator());
|
|
if (CU != CUs.end())
|
|
return &*CU;
|
|
return 0;
|
|
}
|
|
|
|
DWARFCompileUnit *DWARFContext::getCompileUnitForAddress(uint64_t Address) {
|
|
// First, get the offset of the compile unit.
|
|
uint32_t CUOffset = getDebugAranges()->findAddress(Address);
|
|
// Retrieve the compile unit.
|
|
return getCompileUnitForOffset(CUOffset);
|
|
}
|
|
|
|
static bool getFileNameForCompileUnit(DWARFCompileUnit *CU,
|
|
const DWARFLineTable *LineTable,
|
|
uint64_t FileIndex,
|
|
bool NeedsAbsoluteFilePath,
|
|
std::string &FileName) {
|
|
if (CU == 0 ||
|
|
LineTable == 0 ||
|
|
!LineTable->getFileNameByIndex(FileIndex, NeedsAbsoluteFilePath,
|
|
FileName))
|
|
return false;
|
|
if (NeedsAbsoluteFilePath && sys::path::is_relative(FileName)) {
|
|
// We may still need to append compilation directory of compile unit.
|
|
SmallString<16> AbsolutePath;
|
|
if (const char *CompilationDir = CU->getCompilationDir()) {
|
|
sys::path::append(AbsolutePath, CompilationDir);
|
|
}
|
|
sys::path::append(AbsolutePath, FileName);
|
|
FileName = AbsolutePath.str();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static bool getFileLineInfoForCompileUnit(DWARFCompileUnit *CU,
|
|
const DWARFLineTable *LineTable,
|
|
uint64_t Address,
|
|
bool NeedsAbsoluteFilePath,
|
|
std::string &FileName,
|
|
uint32_t &Line, uint32_t &Column) {
|
|
if (CU == 0 || LineTable == 0)
|
|
return false;
|
|
// Get the index of row we're looking for in the line table.
|
|
uint32_t RowIndex = LineTable->lookupAddress(Address);
|
|
if (RowIndex == -1U)
|
|
return false;
|
|
// Take file number and line/column from the row.
|
|
const DWARFDebugLine::Row &Row = LineTable->Rows[RowIndex];
|
|
if (!getFileNameForCompileUnit(CU, LineTable, Row.File,
|
|
NeedsAbsoluteFilePath, FileName))
|
|
return false;
|
|
Line = Row.Line;
|
|
Column = Row.Column;
|
|
return true;
|
|
}
|
|
|
|
DILineInfo DWARFContext::getLineInfoForAddress(uint64_t Address,
|
|
DILineInfoSpecifier Specifier) {
|
|
DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
|
|
if (!CU)
|
|
return DILineInfo();
|
|
std::string FileName = "<invalid>";
|
|
std::string FunctionName = "<invalid>";
|
|
uint32_t Line = 0;
|
|
uint32_t Column = 0;
|
|
if (Specifier.needs(DILineInfoSpecifier::FunctionName)) {
|
|
// The address may correspond to instruction in some inlined function,
|
|
// so we have to build the chain of inlined functions and take the
|
|
// name of the topmost function in it.
|
|
const DWARFDebugInfoEntryMinimal::InlinedChain &InlinedChain =
|
|
CU->getInlinedChainForAddress(Address);
|
|
if (InlinedChain.size() > 0) {
|
|
const DWARFDebugInfoEntryMinimal &TopFunctionDIE = InlinedChain[0];
|
|
if (const char *Name = TopFunctionDIE.getSubroutineName(CU))
|
|
FunctionName = Name;
|
|
}
|
|
}
|
|
if (Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
|
|
const DWARFLineTable *LineTable = getLineTableForCompileUnit(CU);
|
|
const bool NeedsAbsoluteFilePath =
|
|
Specifier.needs(DILineInfoSpecifier::AbsoluteFilePath);
|
|
getFileLineInfoForCompileUnit(CU, LineTable, Address,
|
|
NeedsAbsoluteFilePath,
|
|
FileName, Line, Column);
|
|
}
|
|
return DILineInfo(StringRef(FileName), StringRef(FunctionName),
|
|
Line, Column);
|
|
}
|
|
|
|
DIInliningInfo DWARFContext::getInliningInfoForAddress(uint64_t Address,
|
|
DILineInfoSpecifier Specifier) {
|
|
DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
|
|
if (!CU)
|
|
return DIInliningInfo();
|
|
|
|
const DWARFDebugInfoEntryMinimal::InlinedChain &InlinedChain =
|
|
CU->getInlinedChainForAddress(Address);
|
|
if (InlinedChain.size() == 0)
|
|
return DIInliningInfo();
|
|
|
|
DIInliningInfo InliningInfo;
|
|
uint32_t CallFile = 0, CallLine = 0, CallColumn = 0;
|
|
const DWARFLineTable *LineTable = 0;
|
|
for (uint32_t i = 0, n = InlinedChain.size(); i != n; i++) {
|
|
const DWARFDebugInfoEntryMinimal &FunctionDIE = InlinedChain[i];
|
|
std::string FileName = "<invalid>";
|
|
std::string FunctionName = "<invalid>";
|
|
uint32_t Line = 0;
|
|
uint32_t Column = 0;
|
|
// Get function name if necessary.
|
|
if (Specifier.needs(DILineInfoSpecifier::FunctionName)) {
|
|
if (const char *Name = FunctionDIE.getSubroutineName(CU))
|
|
FunctionName = Name;
|
|
}
|
|
if (Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
|
|
const bool NeedsAbsoluteFilePath =
|
|
Specifier.needs(DILineInfoSpecifier::AbsoluteFilePath);
|
|
if (i == 0) {
|
|
// For the topmost frame, initialize the line table of this
|
|
// compile unit and fetch file/line info from it.
|
|
LineTable = getLineTableForCompileUnit(CU);
|
|
// For the topmost routine, get file/line info from line table.
|
|
getFileLineInfoForCompileUnit(CU, LineTable, Address,
|
|
NeedsAbsoluteFilePath,
|
|
FileName, Line, Column);
|
|
} else {
|
|
// Otherwise, use call file, call line and call column from
|
|
// previous DIE in inlined chain.
|
|
getFileNameForCompileUnit(CU, LineTable, CallFile,
|
|
NeedsAbsoluteFilePath, FileName);
|
|
Line = CallLine;
|
|
Column = CallColumn;
|
|
}
|
|
// Get call file/line/column of a current DIE.
|
|
if (i + 1 < n) {
|
|
FunctionDIE.getCallerFrame(CU, CallFile, CallLine, CallColumn);
|
|
}
|
|
}
|
|
DILineInfo Frame(StringRef(FileName), StringRef(FunctionName),
|
|
Line, Column);
|
|
InliningInfo.addFrame(Frame);
|
|
}
|
|
return InliningInfo;
|
|
}
|
|
|
|
DWARFContextInMemory::DWARFContextInMemory(object::ObjectFile *Obj) :
|
|
IsLittleEndian(true /* FIXME */) {
|
|
error_code ec;
|
|
for (object::section_iterator i = Obj->begin_sections(),
|
|
e = Obj->end_sections();
|
|
i != e; i.increment(ec)) {
|
|
StringRef name;
|
|
i->getName(name);
|
|
StringRef data;
|
|
i->getContents(data);
|
|
|
|
name = name.substr(name.find_first_not_of("._")); // Skip . and _ prefixes.
|
|
if (name == "debug_info")
|
|
InfoSection = data;
|
|
else if (name == "debug_abbrev")
|
|
AbbrevSection = data;
|
|
else if (name == "debug_line")
|
|
LineSection = data;
|
|
else if (name == "debug_aranges")
|
|
ARangeSection = data;
|
|
else if (name == "debug_str")
|
|
StringSection = data;
|
|
else if (name == "debug_ranges") {
|
|
// FIXME: Use the other dwo range section when we emit it.
|
|
RangeDWOSection = data;
|
|
RangeSection = data;
|
|
}
|
|
else if (name == "debug_info.dwo")
|
|
InfoDWOSection = data;
|
|
else if (name == "debug_abbrev.dwo")
|
|
AbbrevDWOSection = data;
|
|
else if (name == "debug_str.dwo")
|
|
StringDWOSection = data;
|
|
else if (name == "debug_str_offsets.dwo")
|
|
StringOffsetDWOSection = data;
|
|
// Any more debug info sections go here.
|
|
else
|
|
continue;
|
|
|
|
// TODO: For now only handle relocations for the debug_info section.
|
|
RelocAddrMap *Map;
|
|
if (name == "debug_info")
|
|
Map = &InfoRelocMap;
|
|
else if (name == "debug_info.dwo")
|
|
Map = &InfoDWORelocMap;
|
|
else
|
|
continue;
|
|
|
|
if (i->begin_relocations() != i->end_relocations()) {
|
|
uint64_t SectionSize;
|
|
i->getSize(SectionSize);
|
|
for (object::relocation_iterator reloc_i = i->begin_relocations(),
|
|
reloc_e = i->end_relocations();
|
|
reloc_i != reloc_e; reloc_i.increment(ec)) {
|
|
uint64_t Address;
|
|
reloc_i->getAddress(Address);
|
|
uint64_t Type;
|
|
reloc_i->getType(Type);
|
|
|
|
object::RelocVisitor V(Obj->getFileFormatName());
|
|
// The section address is always 0 for debug sections.
|
|
object::RelocToApply R(V.visit(Type, *reloc_i));
|
|
if (V.error()) {
|
|
SmallString<32> Name;
|
|
error_code ec(reloc_i->getTypeName(Name));
|
|
if (ec) {
|
|
errs() << "Aaaaaa! Nameless relocation! Aaaaaa!\n";
|
|
}
|
|
errs() << "error: failed to compute relocation: "
|
|
<< Name << "\n";
|
|
continue;
|
|
}
|
|
|
|
if (Address + R.Width > SectionSize) {
|
|
errs() << "error: " << R.Width << "-byte relocation starting "
|
|
<< Address << " bytes into section " << name << " which is "
|
|
<< SectionSize << " bytes long.\n";
|
|
continue;
|
|
}
|
|
if (R.Width > 8) {
|
|
errs() << "error: can't handle a relocation of more than 8 bytes at "
|
|
"a time.\n";
|
|
continue;
|
|
}
|
|
DEBUG(dbgs() << "Writing " << format("%p", R.Value)
|
|
<< " at " << format("%p", Address)
|
|
<< " with width " << format("%d", R.Width)
|
|
<< "\n");
|
|
Map->insert(std::make_pair(Address, std::make_pair(R.Width, R.Value)));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void DWARFContextInMemory::anchor() { }
|