//===----------------------------------------------------------------------===//
//
// This file contains the declaration of the MCDwarfFile to support the dwarf
-// .file directive.
-// TODO: add the support needed for the .loc directive.
+// .file directive and the .loc directive.
//
//===----------------------------------------------------------------------===//
#define LLVM_MC_MCDWARF_H
#include "llvm/ADT/StringRef.h"
+#include "llvm/MC/MachineLocation.h"
+#include "llvm/MC/MCObjectWriter.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/Dwarf.h"
#include <vector>
namespace llvm {
class MCContext;
+ class MCExpr;
class MCSection;
+ class MCSectionData;
+ class MCStreamer;
class MCSymbol;
+ class MCObjectStreamer;
class raw_ostream;
+ class SourceMgr;
+ class SMLoc;
/// MCDwarfFile - Instances of this class represent the name of the dwarf
/// .file directive and its associated dwarf file number in the MC file,
unsigned Flags;
// Isa
unsigned Isa;
+ // Discriminator
+ unsigned Discriminator;
+
+// Flag that indicates the initial value of the is_stmt_start flag.
+#define DWARF2_LINE_DEFAULT_IS_STMT 1
#define DWARF2_FLAG_IS_STMT (1 << 0)
#define DWARF2_FLAG_BASIC_BLOCK (1 << 1)
friend class MCContext;
friend class MCLineEntry;
MCDwarfLoc(unsigned fileNum, unsigned line, unsigned column, unsigned flags,
- unsigned isa)
- : FileNum(fileNum), Line(line), Column(column), Flags(flags), Isa(isa) {}
+ unsigned isa, unsigned discriminator)
+ : FileNum(fileNum), Line(line), Column(column), Flags(flags), Isa(isa),
+ Discriminator(discriminator) {}
// Allow the default copy constructor and assignment operator to be used
// for an MCDwarfLoc object.
public:
+ /// getFileNum - Get the FileNum of this MCDwarfLoc.
+ unsigned getFileNum() const { return FileNum; }
+
+ /// getLine - Get the Line of this MCDwarfLoc.
+ unsigned getLine() const { return Line; }
+
+ /// getColumn - Get the Column of this MCDwarfLoc.
+ unsigned getColumn() const { return Column; }
+
+ /// getFlags - Get the Flags of this MCDwarfLoc.
+ unsigned getFlags() const { return Flags; }
+
+ /// getIsa - Get the Isa of this MCDwarfLoc.
+ unsigned getIsa() const { return Isa; }
+
+ /// getDiscriminator - Get the Discriminator of this MCDwarfLoc.
+ unsigned getDiscriminator() const { return Discriminator; }
+
/// setFileNum - Set the FileNum of this MCDwarfLoc.
void setFileNum(unsigned fileNum) { FileNum = fileNum; }
/// setIsa - Set the Isa of this MCDwarfLoc.
void setIsa(unsigned isa) { Isa = isa; }
+
+ /// setDiscriminator - Set the Discriminator of this MCDwarfLoc.
+ void setDiscriminator(unsigned discriminator) {
+ Discriminator = discriminator;
+ }
};
/// MCLineEntry - Instances of this class represent the line information for
// Constructor to create an MCLineEntry given a symbol and the dwarf loc.
MCLineEntry(MCSymbol *label, const MCDwarfLoc loc) : MCDwarfLoc(loc),
Label(label) {}
+
+ MCSymbol *getLabel() const { return Label; }
+
+ // This is called when an instruction is assembled into the specified
+ // section and if there is information from the last .loc directive that
+ // has yet to have a line entry made for it is made.
+ static void Make(MCStreamer *MCOS, const MCSection *Section);
};
/// MCLineSection - Instances of this class represent the line information
/// .loc directives. This is the information used to build the dwarf line
/// table for a section.
class MCLineSection {
- std::vector<MCLineEntry> MCLineEntries;
private:
MCLineSection(const MCLineSection&); // DO NOT IMPLEMENT
void addLineEntry(const MCLineEntry &LineEntry) {
MCLineEntries.push_back(LineEntry);
}
+
+ typedef std::vector<MCLineEntry> MCLineEntryCollection;
+ typedef MCLineEntryCollection::iterator iterator;
+ typedef MCLineEntryCollection::const_iterator const_iterator;
+
+ private:
+ MCLineEntryCollection MCLineEntries;
+
+ public:
+ const MCLineEntryCollection *getMCLineEntries() const {
+ return &MCLineEntries;
+ }
+ };
+
+ class MCDwarfFileTable {
+ public:
+ //
+ // This emits the Dwarf file and the line tables.
+ //
+ static void Emit(MCStreamer *MCOS);
+ };
+
+ class MCDwarfLineAddr {
+ public:
+ /// Utility function to encode a Dwarf pair of LineDelta and AddrDeltas.
+ static void Encode(int64_t LineDelta, uint64_t AddrDelta, raw_ostream &OS);
+
+ /// Utility function to emit the encoding to a streamer.
+ static void Emit(MCStreamer *MCOS,
+ int64_t LineDelta,uint64_t AddrDelta);
+
+ /// Utility function to write the encoding to an object writer.
+ static void Write(MCObjectWriter *OW,
+ int64_t LineDelta, uint64_t AddrDelta);
+ };
+
+ class MCGenDwarfInfo {
+ public:
+ //
+ // When generating dwarf for assembly source files this emits the Dwarf
+ // sections.
+ //
+ static void Emit(MCStreamer *MCOS);
+ };
+
+ // When generating dwarf for assembly source files this is the info that is
+ // needed to be gathered for each symbol that will have a dwarf label.
+ class MCGenDwarfLabelEntry {
+ private:
+ // Name of the symbol without a leading underbar, if any.
+ StringRef Name;
+ // The dwarf file number this symbol is in.
+ unsigned FileNumber;
+ // The line number this symbol is at.
+ unsigned LineNumber;
+ // The low_pc for the dwarf label is taken from this symbol.
+ MCSymbol *Label;
+
+ public:
+ MCGenDwarfLabelEntry(StringRef name, unsigned fileNumber,
+ unsigned lineNumber, MCSymbol *label) :
+ Name(name), FileNumber(fileNumber), LineNumber(lineNumber), Label(label){}
+
+ StringRef getName() const { return Name; }
+ unsigned getFileNumber() const { return FileNumber; }
+ unsigned getLineNumber() const { return LineNumber; }
+ MCSymbol *getLabel() const { return Label; }
+
+ // This is called when label is created when we are generating dwarf for
+ // assembly source files.
+ static void Make(MCSymbol *Symbol, MCStreamer *MCOS, SourceMgr &SrcMgr,
+ SMLoc &Loc);
+ };
+
+ class MCCFIInstruction {
+ public:
+ enum OpType { SameValue, RememberState, RestoreState, Move, RelMove, Escape,
+ Restore};
+ private:
+ OpType Operation;
+ MCSymbol *Label;
+ // Move to & from location.
+ MachineLocation Destination;
+ MachineLocation Source;
+ std::vector<char> Values;
+ public:
+ MCCFIInstruction(OpType Op, MCSymbol *L)
+ : Operation(Op), Label(L) {
+ assert(Op == RememberState || Op == RestoreState);
+ }
+ MCCFIInstruction(OpType Op, MCSymbol *L, unsigned Register)
+ : Operation(Op), Label(L), Destination(Register) {
+ assert(Op == SameValue || Op == Restore);
+ }
+ MCCFIInstruction(MCSymbol *L, const MachineLocation &D,
+ const MachineLocation &S)
+ : Operation(Move), Label(L), Destination(D), Source(S) {
+ }
+ MCCFIInstruction(OpType Op, MCSymbol *L, const MachineLocation &D,
+ const MachineLocation &S)
+ : Operation(Op), Label(L), Destination(D), Source(S) {
+ assert(Op == RelMove);
+ }
+ MCCFIInstruction(OpType Op, MCSymbol *L, StringRef Vals)
+ : Operation(Op), Label(L), Values(Vals.begin(), Vals.end()) {
+ assert(Op == Escape);
+ }
+ OpType getOperation() const { return Operation; }
+ MCSymbol *getLabel() const { return Label; }
+ const MachineLocation &getDestination() const { return Destination; }
+ const MachineLocation &getSource() const { return Source; }
+ const StringRef getValues() const {
+ return StringRef(&Values[0], Values.size());
+ }
+ };
+
+ struct MCDwarfFrameInfo {
+ MCDwarfFrameInfo() : Begin(0), End(0), Personality(0), Lsda(0),
+ Function(0), Instructions(), PersonalityEncoding(),
+ LsdaEncoding(0), CompactUnwindEncoding(0),
+ IsSignalFrame(false) {}
+ MCSymbol *Begin;
+ MCSymbol *End;
+ const MCSymbol *Personality;
+ const MCSymbol *Lsda;
+ const MCSymbol *Function;
+ std::vector<MCCFIInstruction> Instructions;
+ unsigned PersonalityEncoding;
+ unsigned LsdaEncoding;
+ uint32_t CompactUnwindEncoding;
+ bool IsSignalFrame;
};
+ class MCDwarfFrameEmitter {
+ public:
+ //
+ // This emits the frame info section.
+ //
+ static void Emit(MCStreamer &streamer, bool usingCFI,
+ bool isEH);
+ static void EmitAdvanceLoc(MCStreamer &Streamer, uint64_t AddrDelta);
+ static void EncodeAdvanceLoc(uint64_t AddrDelta, raw_ostream &OS);
+ };
} // end namespace llvm
#endif
projects / oota-llvm.git / blobdiff