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-rw-r--r--llvm/tools/llvm-objdump/llvm-objdump.cpp537
1 files changed, 5 insertions, 532 deletions
diff --git a/llvm/tools/llvm-objdump/llvm-objdump.cpp b/llvm/tools/llvm-objdump/llvm-objdump.cpp
index d6700b6..57aac91 100644
--- a/llvm/tools/llvm-objdump/llvm-objdump.cpp
+++ b/llvm/tools/llvm-objdump/llvm-objdump.cpp
@@ -20,6 +20,7 @@
#include "ELFDump.h"
#include "MachODump.h"
#include "ObjdumpOptID.h"
+#include "SourcePrinter.h"
#include "WasmDump.h"
#include "XCOFFDump.h"
#include "llvm/ADT/IndexedMap.h"
@@ -189,7 +190,7 @@ static bool FaultMapSection;
static bool FileHeaders;
bool objdump::SectionContents;
static std::vector<std::string> InputFilenames;
-static bool PrintLines;
+bool objdump::PrintLines;
static bool MachOOpt;
std::string objdump::MCPU;
std::vector<std::string> objdump::MAttrs;
@@ -202,7 +203,7 @@ bool objdump::PrivateHeaders;
std::vector<std::string> objdump::FilterSections;
bool objdump::SectionHeaders;
static bool ShowLMA;
-static bool PrintSource;
+bool objdump::PrintSource;
static uint64_t StartAddress;
static bool HasStartAddressFlag;
@@ -218,14 +219,9 @@ static bool Wide;
std::string objdump::Prefix;
uint32_t objdump::PrefixStrip;
-enum DebugVarsFormat {
- DVDisabled,
- DVUnicode,
- DVASCII,
-};
-static DebugVarsFormat DbgVariables = DVDisabled;
+DebugVarsFormat objdump::DbgVariables = DVDisabled;
-static int DbgIndent = 40;
+int objdump::DbgIndent = 40;
static StringSet<> DisasmSymbolSet;
StringSet<> objdump::FoundSectionSet;
@@ -435,529 +431,6 @@ unsigned getInstStartColumn(const MCSubtargetInfo &STI) {
return !ShowRawInsn ? 16 : STI.getTargetTriple().isX86() ? 40 : 24;
}
-/// Stores a single expression representing the location of a source-level
-/// variable, along with the PC range for which that expression is valid.
-struct LiveVariable {
- DWARFLocationExpression LocExpr;
- const char *VarName;
- DWARFUnit *Unit;
- const DWARFDie FuncDie;
-
- LiveVariable(const DWARFLocationExpression &LocExpr, const char *VarName,
- DWARFUnit *Unit, const DWARFDie FuncDie)
- : LocExpr(LocExpr), VarName(VarName), Unit(Unit), FuncDie(FuncDie) {}
-
- bool liveAtAddress(object::SectionedAddress Addr) {
- if (LocExpr.Range == None)
- return false;
- return LocExpr.Range->SectionIndex == Addr.SectionIndex &&
- LocExpr.Range->LowPC <= Addr.Address &&
- LocExpr.Range->HighPC > Addr.Address;
- }
-
- void print(raw_ostream &OS, const MCRegisterInfo &MRI) const {
- DataExtractor Data({LocExpr.Expr.data(), LocExpr.Expr.size()},
- Unit->getContext().isLittleEndian(), 0);
- DWARFExpression Expression(Data, Unit->getAddressByteSize());
- Expression.printCompact(OS, MRI);
- }
-};
-
-/// Helper class for printing source variable locations alongside disassembly.
-class LiveVariablePrinter {
- // Information we want to track about one column in which we are printing a
- // variable live range.
- struct Column {
- unsigned VarIdx = NullVarIdx;
- bool LiveIn = false;
- bool LiveOut = false;
- bool MustDrawLabel = false;
-
- bool isActive() const { return VarIdx != NullVarIdx; }
-
- static constexpr unsigned NullVarIdx = std::numeric_limits<unsigned>::max();
- };
-
- // All live variables we know about in the object/image file.
- std::vector<LiveVariable> LiveVariables;
-
- // The columns we are currently drawing.
- IndexedMap<Column> ActiveCols;
-
- const MCRegisterInfo &MRI;
- const MCSubtargetInfo &STI;
-
- void addVariable(DWARFDie FuncDie, DWARFDie VarDie) {
- uint64_t FuncLowPC, FuncHighPC, SectionIndex;
- FuncDie.getLowAndHighPC(FuncLowPC, FuncHighPC, SectionIndex);
- const char *VarName = VarDie.getName(DINameKind::ShortName);
- DWARFUnit *U = VarDie.getDwarfUnit();
-
- Expected<DWARFLocationExpressionsVector> Locs =
- VarDie.getLocations(dwarf::DW_AT_location);
- if (!Locs) {
- // If the variable doesn't have any locations, just ignore it. We don't
- // report an error or warning here as that could be noisy on optimised
- // code.
- consumeError(Locs.takeError());
- return;
- }
-
- for (const DWARFLocationExpression &LocExpr : *Locs) {
- if (LocExpr.Range) {
- LiveVariables.emplace_back(LocExpr, VarName, U, FuncDie);
- } else {
- // If the LocExpr does not have an associated range, it is valid for
- // the whole of the function.
- // TODO: technically it is not valid for any range covered by another
- // LocExpr, does that happen in reality?
- DWARFLocationExpression WholeFuncExpr{
- DWARFAddressRange(FuncLowPC, FuncHighPC, SectionIndex),
- LocExpr.Expr};
- LiveVariables.emplace_back(WholeFuncExpr, VarName, U, FuncDie);
- }
- }
- }
-
- void addFunction(DWARFDie D) {
- for (const DWARFDie &Child : D.children()) {
- if (Child.getTag() == dwarf::DW_TAG_variable ||
- Child.getTag() == dwarf::DW_TAG_formal_parameter)
- addVariable(D, Child);
- else
- addFunction(Child);
- }
- }
-
- // Get the column number (in characters) at which the first live variable
- // line should be printed.
- unsigned getIndentLevel() const {
- return DbgIndent + getInstStartColumn(STI);
- }
-
- // Indent to the first live-range column to the right of the currently
- // printed line, and return the index of that column.
- // TODO: formatted_raw_ostream uses "column" to mean a number of characters
- // since the last \n, and we use it to mean the number of slots in which we
- // put live variable lines. Pick a less overloaded word.
- unsigned moveToFirstVarColumn(formatted_raw_ostream &OS) {
- // Logical column number: column zero is the first column we print in, each
- // logical column is 2 physical columns wide.
- unsigned FirstUnprintedLogicalColumn =
- std::max((int)(OS.getColumn() - getIndentLevel() + 1) / 2, 0);
- // Physical column number: the actual column number in characters, with
- // zero being the left-most side of the screen.
- unsigned FirstUnprintedPhysicalColumn =
- getIndentLevel() + FirstUnprintedLogicalColumn * 2;
-
- if (FirstUnprintedPhysicalColumn > OS.getColumn())
- OS.PadToColumn(FirstUnprintedPhysicalColumn);
-
- return FirstUnprintedLogicalColumn;
- }
-
- unsigned findFreeColumn() {
- for (unsigned ColIdx = 0; ColIdx < ActiveCols.size(); ++ColIdx)
- if (!ActiveCols[ColIdx].isActive())
- return ColIdx;
-
- size_t OldSize = ActiveCols.size();
- ActiveCols.grow(std::max<size_t>(OldSize * 2, 1));
- return OldSize;
- }
-
-public:
- LiveVariablePrinter(const MCRegisterInfo &MRI, const MCSubtargetInfo &STI)
- : LiveVariables(), ActiveCols(Column()), MRI(MRI), STI(STI) {}
-
- void dump() const {
- for (const LiveVariable &LV : LiveVariables) {
- dbgs() << LV.VarName << " @ " << LV.LocExpr.Range << ": ";
- LV.print(dbgs(), MRI);
- dbgs() << "\n";
- }
- }
-
- void addCompileUnit(DWARFDie D) {
- if (D.getTag() == dwarf::DW_TAG_subprogram)
- addFunction(D);
- else
- for (const DWARFDie &Child : D.children())
- addFunction(Child);
- }
-
- /// Update to match the state of the instruction between ThisAddr and
- /// NextAddr. In the common case, any live range active at ThisAddr is
- /// live-in to the instruction, and any live range active at NextAddr is
- /// live-out of the instruction. If IncludeDefinedVars is false, then live
- /// ranges starting at NextAddr will be ignored.
- void update(object::SectionedAddress ThisAddr,
- object::SectionedAddress NextAddr, bool IncludeDefinedVars) {
- // First, check variables which have already been assigned a column, so
- // that we don't change their order.
- SmallSet<unsigned, 8> CheckedVarIdxs;
- for (unsigned ColIdx = 0, End = ActiveCols.size(); ColIdx < End; ++ColIdx) {
- if (!ActiveCols[ColIdx].isActive())
- continue;
- CheckedVarIdxs.insert(ActiveCols[ColIdx].VarIdx);
- LiveVariable &LV = LiveVariables[ActiveCols[ColIdx].VarIdx];
- ActiveCols[ColIdx].LiveIn = LV.liveAtAddress(ThisAddr);
- ActiveCols[ColIdx].LiveOut = LV.liveAtAddress(NextAddr);
- LLVM_DEBUG(dbgs() << "pass 1, " << ThisAddr.Address << "-"
- << NextAddr.Address << ", " << LV.VarName << ", Col "
- << ColIdx << ": LiveIn=" << ActiveCols[ColIdx].LiveIn
- << ", LiveOut=" << ActiveCols[ColIdx].LiveOut << "\n");
-
- if (!ActiveCols[ColIdx].LiveIn && !ActiveCols[ColIdx].LiveOut)
- ActiveCols[ColIdx].VarIdx = Column::NullVarIdx;
- }
-
- // Next, look for variables which don't already have a column, but which
- // are now live.
- if (IncludeDefinedVars) {
- for (unsigned VarIdx = 0, End = LiveVariables.size(); VarIdx < End;
- ++VarIdx) {
- if (CheckedVarIdxs.count(VarIdx))
- continue;
- LiveVariable &LV = LiveVariables[VarIdx];
- bool LiveIn = LV.liveAtAddress(ThisAddr);
- bool LiveOut = LV.liveAtAddress(NextAddr);
- if (!LiveIn && !LiveOut)
- continue;
-
- unsigned ColIdx = findFreeColumn();
- LLVM_DEBUG(dbgs() << "pass 2, " << ThisAddr.Address << "-"
- << NextAddr.Address << ", " << LV.VarName << ", Col "
- << ColIdx << ": LiveIn=" << LiveIn
- << ", LiveOut=" << LiveOut << "\n");
- ActiveCols[ColIdx].VarIdx = VarIdx;
- ActiveCols[ColIdx].LiveIn = LiveIn;
- ActiveCols[ColIdx].LiveOut = LiveOut;
- ActiveCols[ColIdx].MustDrawLabel = true;
- }
- }
- }
-
- enum class LineChar {
- RangeStart,
- RangeMid,
- RangeEnd,
- LabelVert,
- LabelCornerNew,
- LabelCornerActive,
- LabelHoriz,
- };
- const char *getLineChar(LineChar C) const {
- bool IsASCII = DbgVariables == DVASCII;
- switch (C) {
- case LineChar::RangeStart:
- return IsASCII ? "^" : (const char *)u8"\u2548";
- case LineChar::RangeMid:
- return IsASCII ? "|" : (const char *)u8"\u2503";
- case LineChar::RangeEnd:
- return IsASCII ? "v" : (const char *)u8"\u253b";
- case LineChar::LabelVert:
- return IsASCII ? "|" : (const char *)u8"\u2502";
- case LineChar::LabelCornerNew:
- return IsASCII ? "/" : (const char *)u8"\u250c";
- case LineChar::LabelCornerActive:
- return IsASCII ? "|" : (const char *)u8"\u2520";
- case LineChar::LabelHoriz:
- return IsASCII ? "-" : (const char *)u8"\u2500";
- }
- llvm_unreachable("Unhandled LineChar enum");
- }
-
- /// Print live ranges to the right of an existing line. This assumes the
- /// line is not an instruction, so doesn't start or end any live ranges, so
- /// we only need to print active ranges or empty columns. If AfterInst is
- /// true, this is being printed after the last instruction fed to update(),
- /// otherwise this is being printed before it.
- void printAfterOtherLine(formatted_raw_ostream &OS, bool AfterInst) {
- if (ActiveCols.size()) {
- unsigned FirstUnprintedColumn = moveToFirstVarColumn(OS);
- for (size_t ColIdx = FirstUnprintedColumn, End = ActiveCols.size();
- ColIdx < End; ++ColIdx) {
- if (ActiveCols[ColIdx].isActive()) {
- if ((AfterInst && ActiveCols[ColIdx].LiveOut) ||
- (!AfterInst && ActiveCols[ColIdx].LiveIn))
- OS << getLineChar(LineChar::RangeMid);
- else if (!AfterInst && ActiveCols[ColIdx].LiveOut)
- OS << getLineChar(LineChar::LabelVert);
- else
- OS << " ";
- }
- OS << " ";
- }
- }
- OS << "\n";
- }
-
- /// Print any live variable range info needed to the right of a
- /// non-instruction line of disassembly. This is where we print the variable
- /// names and expressions, with thin line-drawing characters connecting them
- /// to the live range which starts at the next instruction. If MustPrint is
- /// true, we have to print at least one line (with the continuation of any
- /// already-active live ranges) because something has already been printed
- /// earlier on this line.
- void printBetweenInsts(formatted_raw_ostream &OS, bool MustPrint) {
- bool PrintedSomething = false;
- for (unsigned ColIdx = 0, End = ActiveCols.size(); ColIdx < End; ++ColIdx) {
- if (ActiveCols[ColIdx].isActive() && ActiveCols[ColIdx].MustDrawLabel) {
- // First we need to print the live range markers for any active
- // columns to the left of this one.
- OS.PadToColumn(getIndentLevel());
- for (unsigned ColIdx2 = 0; ColIdx2 < ColIdx; ++ColIdx2) {
- if (ActiveCols[ColIdx2].isActive()) {
- if (ActiveCols[ColIdx2].MustDrawLabel &&
- !ActiveCols[ColIdx2].LiveIn)
- OS << getLineChar(LineChar::LabelVert) << " ";
- else
- OS << getLineChar(LineChar::RangeMid) << " ";
- } else
- OS << " ";
- }
-
- // Then print the variable name and location of the new live range,
- // with box drawing characters joining it to the live range line.
- OS << getLineChar(ActiveCols[ColIdx].LiveIn
- ? LineChar::LabelCornerActive
- : LineChar::LabelCornerNew)
- << getLineChar(LineChar::LabelHoriz) << " ";
- WithColor(OS, raw_ostream::GREEN)
- << LiveVariables[ActiveCols[ColIdx].VarIdx].VarName;
- OS << " = ";
- {
- WithColor ExprColor(OS, raw_ostream::CYAN);
- LiveVariables[ActiveCols[ColIdx].VarIdx].print(OS, MRI);
- }
-
- // If there are any columns to the right of the expression we just
- // printed, then continue their live range lines.
- unsigned FirstUnprintedColumn = moveToFirstVarColumn(OS);
- for (unsigned ColIdx2 = FirstUnprintedColumn, End = ActiveCols.size();
- ColIdx2 < End; ++ColIdx2) {
- if (ActiveCols[ColIdx2].isActive() && ActiveCols[ColIdx2].LiveIn)
- OS << getLineChar(LineChar::RangeMid) << " ";
- else
- OS << " ";
- }
-
- OS << "\n";
- PrintedSomething = true;
- }
- }
-
- for (unsigned ColIdx = 0, End = ActiveCols.size(); ColIdx < End; ++ColIdx)
- if (ActiveCols[ColIdx].isActive())
- ActiveCols[ColIdx].MustDrawLabel = false;
-
- // If we must print something (because we printed a line/column number),
- // but don't have any new variables to print, then print a line which
- // just continues any existing live ranges.
- if (MustPrint && !PrintedSomething)
- printAfterOtherLine(OS, false);
- }
-
- /// Print the live variable ranges to the right of a disassembled instruction.
- void printAfterInst(formatted_raw_ostream &OS) {
- if (!ActiveCols.size())
- return;
- unsigned FirstUnprintedColumn = moveToFirstVarColumn(OS);
- for (unsigned ColIdx = FirstUnprintedColumn, End = ActiveCols.size();
- ColIdx < End; ++ColIdx) {
- if (!ActiveCols[ColIdx].isActive())
- OS << " ";
- else if (ActiveCols[ColIdx].LiveIn && ActiveCols[ColIdx].LiveOut)
- OS << getLineChar(LineChar::RangeMid) << " ";
- else if (ActiveCols[ColIdx].LiveOut)
- OS << getLineChar(LineChar::RangeStart) << " ";
- else if (ActiveCols[ColIdx].LiveIn)
- OS << getLineChar(LineChar::RangeEnd) << " ";
- else
- llvm_unreachable("var must be live in or out!");
- }
- }
-};
-
-class SourcePrinter {
-protected:
- DILineInfo OldLineInfo;
- const ObjectFile *Obj = nullptr;
- std::unique_ptr<symbolize::LLVMSymbolizer> Symbolizer;
- // File name to file contents of source.
- std::unordered_map<std::string, std::unique_ptr<MemoryBuffer>> SourceCache;
- // Mark the line endings of the cached source.
- std::unordered_map<std::string, std::vector<StringRef>> LineCache;
- // Keep track of missing sources.
- StringSet<> MissingSources;
- // Only emit 'invalid debug info' warning once.
- bool WarnedInvalidDebugInfo = false;
-
-private:
- bool cacheSource(const DILineInfo& LineInfoFile);
-
- void printLines(formatted_raw_ostream &OS, const DILineInfo &LineInfo,
- StringRef Delimiter, LiveVariablePrinter &LVP);
-
- void printSources(formatted_raw_ostream &OS, const DILineInfo &LineInfo,
- StringRef ObjectFilename, StringRef Delimiter,
- LiveVariablePrinter &LVP);
-
-public:
- SourcePrinter() = default;
- SourcePrinter(const ObjectFile *Obj, StringRef DefaultArch) : Obj(Obj) {
- symbolize::LLVMSymbolizer::Options SymbolizerOpts;
- SymbolizerOpts.PrintFunctions =
- DILineInfoSpecifier::FunctionNameKind::LinkageName;
- SymbolizerOpts.Demangle = Demangle;
- SymbolizerOpts.DefaultArch = std::string(DefaultArch);
- Symbolizer.reset(new symbolize::LLVMSymbolizer(SymbolizerOpts));
- }
- virtual ~SourcePrinter() = default;
- virtual void printSourceLine(formatted_raw_ostream &OS,
- object::SectionedAddress Address,
- StringRef ObjectFilename,
- LiveVariablePrinter &LVP,
- StringRef Delimiter = "; ");
-};
-
-bool SourcePrinter::cacheSource(const DILineInfo &LineInfo) {
- std::unique_ptr<MemoryBuffer> Buffer;
- if (LineInfo.Source) {
- Buffer = MemoryBuffer::getMemBuffer(*LineInfo.Source);
- } else {
- auto BufferOrError = MemoryBuffer::getFile(LineInfo.FileName);
- if (!BufferOrError) {
- if (MissingSources.insert(LineInfo.FileName).second)
- reportWarning("failed to find source " + LineInfo.FileName,
- Obj->getFileName());
- return false;
- }
- Buffer = std::move(*BufferOrError);
- }
- // Chomp the file to get lines
- const char *BufferStart = Buffer->getBufferStart(),
- *BufferEnd = Buffer->getBufferEnd();
- std::vector<StringRef> &Lines = LineCache[LineInfo.FileName];
- const char *Start = BufferStart;
- for (const char *I = BufferStart; I != BufferEnd; ++I)
- if (*I == '\n') {
- Lines.emplace_back(Start, I - Start - (BufferStart < I && I[-1] == '\r'));
- Start = I + 1;
- }
- if (Start < BufferEnd)
- Lines.emplace_back(Start, BufferEnd - Start);
- SourceCache[LineInfo.FileName] = std::move(Buffer);
- return true;
-}
-
-void SourcePrinter::printSourceLine(formatted_raw_ostream &OS,
- object::SectionedAddress Address,
- StringRef ObjectFilename,
- LiveVariablePrinter &LVP,
- StringRef Delimiter) {
- if (!Symbolizer)
- return;
-
- DILineInfo LineInfo = DILineInfo();
- Expected<DILineInfo> ExpectedLineInfo =
- Symbolizer->symbolizeCode(*Obj, Address);
- std::string ErrorMessage;
- if (ExpectedLineInfo) {
- LineInfo = *ExpectedLineInfo;
- } else if (!WarnedInvalidDebugInfo) {
- WarnedInvalidDebugInfo = true;
- // TODO Untested.
- reportWarning("failed to parse debug information: " +
- toString(ExpectedLineInfo.takeError()),
- ObjectFilename);
- }
-
- if (!Prefix.empty() && sys::path::is_absolute_gnu(LineInfo.FileName)) {
- // FileName has at least one character since is_absolute_gnu is false for
- // an empty string.
- assert(!LineInfo.FileName.empty());
- if (PrefixStrip > 0) {
- uint32_t Level = 0;
- auto StrippedNameStart = LineInfo.FileName.begin();
-
- // Path.h iterator skips extra separators. Therefore it cannot be used
- // here to keep compatibility with GNU Objdump.
- for (auto Pos = StrippedNameStart + 1, End = LineInfo.FileName.end();
- Pos != End && Level < PrefixStrip; ++Pos) {
- if (sys::path::is_separator(*Pos)) {
- StrippedNameStart = Pos;
- ++Level;
- }
- }
-
- LineInfo.FileName =
- std::string(StrippedNameStart, LineInfo.FileName.end());
- }
-
- SmallString<128> FilePath;
- sys::path::append(FilePath, Prefix, LineInfo.FileName);
-
- LineInfo.FileName = std::string(FilePath);
- }
-
- if (PrintLines)
- printLines(OS, LineInfo, Delimiter, LVP);
- if (PrintSource)
- printSources(OS, LineInfo, ObjectFilename, Delimiter, LVP);
- OldLineInfo = LineInfo;
-}
-
-void SourcePrinter::printLines(formatted_raw_ostream &OS,
- const DILineInfo &LineInfo, StringRef Delimiter,
- LiveVariablePrinter &LVP) {
- bool PrintFunctionName = LineInfo.FunctionName != DILineInfo::BadString &&
- LineInfo.FunctionName != OldLineInfo.FunctionName;
- if (PrintFunctionName) {
- OS << Delimiter << LineInfo.FunctionName;
- // If demangling is successful, FunctionName will end with "()". Print it
- // only if demangling did not run or was unsuccessful.
- if (!StringRef(LineInfo.FunctionName).endswith("()"))
- OS << "()";
- OS << ":\n";
- }
- if (LineInfo.FileName != DILineInfo::BadString && LineInfo.Line != 0 &&
- (OldLineInfo.Line != LineInfo.Line ||
- OldLineInfo.FileName != LineInfo.FileName || PrintFunctionName)) {
- OS << Delimiter << LineInfo.FileName << ":" << LineInfo.Line;
- LVP.printBetweenInsts(OS, true);
- }
-}
-
-void SourcePrinter::printSources(formatted_raw_ostream &OS,
- const DILineInfo &LineInfo,
- StringRef ObjectFilename, StringRef Delimiter,
- LiveVariablePrinter &LVP) {
- if (LineInfo.FileName == DILineInfo::BadString || LineInfo.Line == 0 ||
- (OldLineInfo.Line == LineInfo.Line &&
- OldLineInfo.FileName == LineInfo.FileName))
- return;
-
- if (SourceCache.find(LineInfo.FileName) == SourceCache.end())
- if (!cacheSource(LineInfo))
- return;
- auto LineBuffer = LineCache.find(LineInfo.FileName);
- if (LineBuffer != LineCache.end()) {
- if (LineInfo.Line > LineBuffer->second.size()) {
- reportWarning(
- formatv(
- "debug info line number {0} exceeds the number of lines in {1}",
- LineInfo.Line, LineInfo.FileName),
- ObjectFilename);
- return;
- }
- // Vector begins at 0, line numbers are non-zero
- OS << Delimiter << LineBuffer->second[LineInfo.Line - 1];
- LVP.printBetweenInsts(OS, true);
- }
-}
-
static bool isAArch64Elf(const ObjectFile *Obj) {
const auto *Elf = dyn_cast<ELFObjectFileBase>(Obj);
return Elf && Elf->getEMachine() == ELF::EM_AARCH64;
generated by cgit v1.1 at 2025-08-03 01:07:19 +0000