#define LLVM_MC_MCDWARF_H
#include "llvm/ADT/ArrayRef.h"
-#include "llvm/ADT/StringRef.h"
-#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/MapVector.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/MC/MCSection.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/raw_ostream.h"
#include <map>
-#include <vector>
#include <string>
#include <utility>
+#include <vector>
namespace llvm {
class MCAsmBackend;
class MCContext;
class MCObjectStreamer;
-class MCSection;
class MCStreamer;
class MCSymbol;
class SourceMgr;
class SMLoc;
-/// MCDwarfFile - Instances of this class represent the name of the dwarf
+/// \brief Instances of this class represent the name of the dwarf
/// .file directive and its associated dwarf file number in the MC file,
-/// and MCDwarfFile's are created and unique'd by the MCContext class where
+/// and MCDwarfFile's are created and uniqued by the MCContext class where
/// the file number for each is its index into the vector of DwarfFiles (note
/// index 0 is not used and not a valid dwarf file number).
struct MCDwarfFile {
- // Name - the base name of the file without its directory path.
+ // \brief The base name of the file without its directory path.
// The StringRef references memory allocated in the MCContext.
std::string Name;
- // DirIndex - the index into the list of directory names for this file name.
+ // \brief The index into the list of directory names for this file name.
unsigned DirIndex;
};
-/// MCDwarfLoc - Instances of this class represent the information from a
+/// \brief Instances of this class represent the information from a
/// dwarf .loc directive.
class MCDwarfLoc {
- // FileNum - the file number.
- unsigned FileNum;
- // Line - the line number.
- unsigned Line;
- // Column - the column position.
- unsigned Column;
+ uint32_t FileNum;
+ uint32_t Line;
+ uint16_t Column;
// Flags (see #define's below)
- unsigned Flags;
- // Isa
- unsigned Isa;
- // Discriminator
- unsigned Discriminator;
+ uint8_t Flags;
+ uint8_t Isa;
+ uint32_t Discriminator;
// Flag that indicates the initial value of the is_stmt_start flag.
#define DWARF2_LINE_DEFAULT_IS_STMT 1
// for an MCDwarfLoc object.
public:
- /// getFileNum - Get the FileNum of this MCDwarfLoc.
+ /// \brief Get the FileNum of this MCDwarfLoc.
unsigned getFileNum() const { return FileNum; }
- /// getLine - Get the Line of this MCDwarfLoc.
+ /// \brief Get the Line of this MCDwarfLoc.
unsigned getLine() const { return Line; }
- /// getColumn - Get the Column of this MCDwarfLoc.
+ /// \brief Get the Column of this MCDwarfLoc.
unsigned getColumn() const { return Column; }
- /// getFlags - Get the Flags of this MCDwarfLoc.
+ /// \brief Get the Flags of this MCDwarfLoc.
unsigned getFlags() const { return Flags; }
- /// getIsa - Get the Isa of this MCDwarfLoc.
+ /// \brief Get the Isa of this MCDwarfLoc.
unsigned getIsa() const { return Isa; }
- /// getDiscriminator - Get the Discriminator of this MCDwarfLoc.
+ /// \brief Get the Discriminator of this MCDwarfLoc.
unsigned getDiscriminator() const { return Discriminator; }
- /// setFileNum - Set the FileNum of this MCDwarfLoc.
+ /// \brief Set the FileNum of this MCDwarfLoc.
void setFileNum(unsigned fileNum) { FileNum = fileNum; }
- /// setLine - Set the Line of this MCDwarfLoc.
+ /// \brief Set the Line of this MCDwarfLoc.
void setLine(unsigned line) { Line = line; }
- /// setColumn - Set the Column of this MCDwarfLoc.
- void setColumn(unsigned column) { Column = column; }
+ /// \brief Set the Column of this MCDwarfLoc.
+ void setColumn(unsigned column) {
+ assert(column <= UINT16_MAX);
+ Column = column;
+ }
- /// setFlags - Set the Flags of this MCDwarfLoc.
- void setFlags(unsigned flags) { Flags = flags; }
+ /// \brief Set the Flags of this MCDwarfLoc.
+ void setFlags(unsigned flags) {
+ assert(flags <= UINT8_MAX);
+ Flags = flags;
+ }
- /// setIsa - Set the Isa of this MCDwarfLoc.
- void setIsa(unsigned isa) { Isa = isa; }
+ /// \brief Set the Isa of this MCDwarfLoc.
+ void setIsa(unsigned isa) {
+ assert(isa <= UINT8_MAX);
+ Isa = isa;
+ }
- /// setDiscriminator - Set the Discriminator of this MCDwarfLoc.
+ /// \brief Set the Discriminator of this MCDwarfLoc.
void setDiscriminator(unsigned discriminator) {
Discriminator = discriminator;
}
};
-/// MCLineEntry - Instances of this class represent the line information for
+/// \brief Instances of this class represent the line information for
/// the dwarf line table entries. Which is created after a machine
/// instruction is assembled and uses an address from a temporary label
/// created at the current address in the current section and the info from
// 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(MCObjectStreamer *MCOS, const MCSection *Section);
+ static void Make(MCObjectStreamer *MCOS, MCSection *Section);
};
-/// MCLineSection - Instances of this class represent the line information
-/// for a compile unit where machine instructions have been assembled after seeing
-/// .loc directives. This is the information used to build the dwarf line
+/// \brief Instances of this class represent the line information for a compile
+/// unit where machine instructions have been assembled after seeing .loc
+/// directives. This is the information used to build the dwarf line
/// table for a section.
class MCLineSection {
public:
- // addLineEntry - adds an entry to this MCLineSection's line entries
- void addLineEntry(const MCLineEntry &LineEntry, const MCSection *Sec) {
+ // \brief Add an entry to this MCLineSection's line entries.
+ void addLineEntry(const MCLineEntry &LineEntry, MCSection *Sec) {
MCLineDivisions[Sec].push_back(LineEntry);
}
typedef std::vector<MCLineEntry> MCLineEntryCollection;
typedef MCLineEntryCollection::iterator iterator;
typedef MCLineEntryCollection::const_iterator const_iterator;
- typedef MapVector<const MCSection *, MCLineEntryCollection> MCLineDivisionMap;
+ typedef MapVector<MCSection *, MCLineEntryCollection> MCLineDivisionMap;
private:
// A collection of MCLineEntry for each section.
}
};
+struct MCDwarfLineTableParams {
+ /// First special line opcode - leave room for the standard opcodes.
+ /// Note: If you want to change this, you'll have to update the
+ /// "StandardOpcodeLengths" table that is emitted in
+ /// \c Emit().
+ uint8_t DWARF2LineOpcodeBase = 13;
+ /// Minimum line offset in a special line info. opcode. The value
+ /// -5 was chosen to give a reasonable range of values.
+ int8_t DWARF2LineBase = -5;
+ /// Range of line offsets in a special line info. opcode.
+ uint8_t DWARF2LineRange = 14;
+};
+
struct MCDwarfLineTableHeader {
MCSymbol *Label;
SmallVector<std::string, 3> MCDwarfDirs;
MCDwarfLineTableHeader() : Label(nullptr) {}
unsigned getFile(StringRef &Directory, StringRef &FileName,
unsigned FileNumber = 0);
- std::pair<MCSymbol *, MCSymbol *> Emit(MCStreamer *MCOS) const;
+ std::pair<MCSymbol *, MCSymbol *> Emit(MCStreamer *MCOS,
+ MCDwarfLineTableParams Params) const;
std::pair<MCSymbol *, MCSymbol *>
- Emit(MCStreamer *MCOS, ArrayRef<char> SpecialOpcodeLengths) const;
+ Emit(MCStreamer *MCOS, MCDwarfLineTableParams Params,
+ ArrayRef<char> SpecialOpcodeLengths) const;
};
class MCDwarfDwoLineTable {
unsigned getFile(StringRef Directory, StringRef FileName) {
return Header.getFile(Directory, FileName);
}
- void Emit(MCStreamer &MCOS) const;
+ void Emit(MCStreamer &MCOS, MCDwarfLineTableParams Params) const;
};
class MCDwarfLineTable {
public:
// This emits the Dwarf file and the line tables for all Compile Units.
- static void Emit(MCObjectStreamer *MCOS);
+ static void Emit(MCObjectStreamer *MCOS, MCDwarfLineTableParams Params);
// This emits the Dwarf file and the line tables for a given Compile Unit.
- void EmitCU(MCObjectStreamer *MCOS) const;
+ void EmitCU(MCObjectStreamer *MCOS, MCDwarfLineTableParams Params) const;
unsigned getFile(StringRef &Directory, StringRef &FileName,
unsigned FileNumber = 0);
class MCDwarfLineAddr {
public:
/// Utility function to encode a Dwarf pair of LineDelta and AddrDeltas.
- static void Encode(MCContext &Context, int64_t LineDelta, uint64_t AddrDelta,
- raw_ostream &OS);
+ static void Encode(MCContext &Context, MCDwarfLineTableParams Params,
+ 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);
+ static void Emit(MCStreamer *MCOS, MCDwarfLineTableParams Params,
+ int64_t LineDelta, uint64_t AddrDelta);
};
class MCGenDwarfInfo {
OpRestore,
OpUndefined,
OpRegister,
- OpWindowSave
+ OpWindowSave,
+ OpGnuArgsSize
};
private:
return MCCFIInstruction(OpEscape, L, 0, 0, Vals);
}
+ /// \brief A special wrapper for .cfi_escape that indicates GNU_ARGS_SIZE
+ static MCCFIInstruction createGnuArgsSize(MCSymbol *L, int Size) {
+ return MCCFIInstruction(OpGnuArgsSize, L, 0, Size, "");
+ }
+
OpType getOperation() const { return Operation; }
MCSymbol *getLabel() const { return Label; }
int getOffset() const {
assert(Operation == OpDefCfa || Operation == OpOffset ||
Operation == OpRelOffset || Operation == OpDefCfaOffset ||
- Operation == OpAdjustCfaOffset);
+ Operation == OpAdjustCfaOffset || Operation == OpGnuArgsSize);
return Offset;
}
- const StringRef getValues() const {
+ StringRef getValues() const {
assert(Operation == OpEscape);
return StringRef(&Values[0], Values.size());
}
struct MCDwarfFrameInfo {
MCDwarfFrameInfo()
- : Begin(nullptr), End(nullptr), Personality(nullptr), Lsda(nullptr),
- Function(nullptr), Instructions(), PersonalityEncoding(), LsdaEncoding(0),
- CompactUnwindEncoding(0), IsSignalFrame(false), IsSimple(false) {}
+ : Begin(nullptr), End(nullptr), Personality(nullptr), Lsda(nullptr),
+ Instructions(), CurrentCfaRegister(0), PersonalityEncoding(),
+ LsdaEncoding(0), CompactUnwindEncoding(0), IsSignalFrame(false),
+ IsSimple(false) {}
MCSymbol *Begin;
MCSymbol *End;
const MCSymbol *Personality;
const MCSymbol *Lsda;
- const MCSymbol *Function;
std::vector<MCCFIInstruction> Instructions;
+ unsigned CurrentCfaRegister;
unsigned PersonalityEncoding;
unsigned LsdaEncoding;
uint32_t CompactUnwindEncoding;
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