#ifndef LLVM_MC_MCDWARF_H
#define LLVM_MC_MCDWARF_H
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/MapVector.h"
+#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/raw_ostream.h"
#include <map>
+#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).
-class MCDwarfFile {
- // Name - the base name of the file without its directory path.
+struct MCDwarfFile {
+ // \brief The base name of the file without its directory path.
// The StringRef references memory allocated in the MCContext.
- StringRef Name;
+ 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;
-
-private: // MCContext creates and uniques these.
- friend class MCContext;
- MCDwarfFile(StringRef name, unsigned dirIndex)
- : Name(name), DirIndex(dirIndex) {}
-
- MCDwarfFile(const MCDwarfFile &) LLVM_DELETED_FUNCTION;
- void operator=(const MCDwarfFile &) LLVM_DELETED_FUNCTION;
-
-public:
- /// getName - Get the base name of this MCDwarfFile.
- StringRef getName() const { return Name; }
-
- /// getDirIndex - Get the dirIndex of this MCDwarfFile.
- unsigned getDirIndex() const { return DirIndex; }
-
- /// print - Print the value to the stream \p OS.
- void print(raw_ostream &OS) const;
-
- /// dump - Print the value to stderr.
- void dump() const;
};
-inline raw_ostream &operator<<(raw_ostream &OS, const MCDwarfFile &DwarfFile) {
- DwarfFile.print(OS);
- return OS;
-}
-
-/// 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(MCStreamer *MCOS, const MCSection *Section);
+ static void Make(MCObjectStreamer *MCOS, MCSection *Section);
};
-/// MCLineSection - Instances of this class represent the line information
-/// for a section 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 {
-
-private:
- MCLineSection(const MCLineSection &) LLVM_DELETED_FUNCTION;
- void operator=(const MCLineSection &) LLVM_DELETED_FUNCTION;
-
public:
- // Constructor to create an MCLineSection with an empty MCLineEntries
- // vector.
- MCLineSection() {}
-
- // addLineEntry - adds an entry to this MCLineSection's line entries
- void addLineEntry(const MCLineEntry &LineEntry, unsigned CUID) {
- MCLineDivisions[CUID].push_back(LineEntry);
+ // \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 std::map<unsigned, MCLineEntryCollection> MCLineDivisionMap;
+ typedef MapVector<MCSection *, MCLineEntryCollection> MCLineDivisionMap;
private:
- // A collection of MCLineEntry for each Compile Unit ID.
+ // A collection of MCLineEntry for each section.
MCLineDivisionMap MCLineDivisions;
public:
- // Returns whether MCLineSection contains entries for a given Compile
- // Unit ID.
- bool containEntriesForID(unsigned CUID) const {
- return MCLineDivisions.count(CUID);
- }
// Returns the collection of MCLineEntry for a given Compile Unit ID.
- const MCLineEntryCollection &getMCLineEntries(unsigned CUID) const {
- MCLineDivisionMap::const_iterator CIter = MCLineDivisions.find(CUID);
- assert(CIter != MCLineDivisions.end());
- return CIter->second;
+ const MCLineDivisionMap &getMCLineEntries() const {
+ return MCLineDivisions;
}
};
-class MCDwarfFileTable {
+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;
+ SmallVector<MCDwarfFile, 3> MCDwarfFiles;
+ StringMap<unsigned> SourceIdMap;
+ StringRef CompilationDir;
+
+ MCDwarfLineTableHeader() : Label(nullptr) {}
+ unsigned getFile(StringRef &Directory, StringRef &FileName,
+ unsigned FileNumber = 0);
+ std::pair<MCSymbol *, MCSymbol *> Emit(MCStreamer *MCOS,
+ MCDwarfLineTableParams Params) const;
+ std::pair<MCSymbol *, MCSymbol *>
+ Emit(MCStreamer *MCOS, MCDwarfLineTableParams Params,
+ ArrayRef<char> SpecialOpcodeLengths) const;
+};
+
+class MCDwarfDwoLineTable {
+ MCDwarfLineTableHeader Header;
+public:
+ void setCompilationDir(StringRef CompilationDir) {
+ Header.CompilationDir = CompilationDir;
+ }
+ unsigned getFile(StringRef Directory, StringRef FileName) {
+ return Header.getFile(Directory, FileName);
+ }
+ void Emit(MCStreamer &MCOS, MCDwarfLineTableParams Params) const;
+};
+
+class MCDwarfLineTable {
+ MCDwarfLineTableHeader Header;
+ MCLineSection MCLineSections;
+
public:
- //
// This emits the Dwarf file and the line tables for all Compile Units.
- //
- static const MCSymbol *Emit(MCStreamer *MCOS);
- //
+ static void Emit(MCObjectStreamer *MCOS, MCDwarfLineTableParams Params);
+
// This emits the Dwarf file and the line tables for a given Compile Unit.
- //
- static const MCSymbol *EmitCU(MCStreamer *MCOS, unsigned ID);
+ void EmitCU(MCObjectStreamer *MCOS, MCDwarfLineTableParams Params) const;
+
+ unsigned getFile(StringRef &Directory, StringRef &FileName,
+ unsigned FileNumber = 0);
+
+ MCSymbol *getLabel() const {
+ return Header.Label;
+ }
+
+ void setLabel(MCSymbol *Label) {
+ Header.Label = Label;
+ }
+
+ void setCompilationDir(StringRef CompilationDir) {
+ Header.CompilationDir = CompilationDir;
+ }
+
+ const SmallVectorImpl<std::string> &getMCDwarfDirs() const {
+ return Header.MCDwarfDirs;
+ }
+
+ SmallVectorImpl<std::string> &getMCDwarfDirs() {
+ return Header.MCDwarfDirs;
+ }
+
+ const SmallVectorImpl<MCDwarfFile> &getMCDwarfFiles() const {
+ return Header.MCDwarfFiles;
+ }
+
+ SmallVectorImpl<MCDwarfFile> &getMCDwarfFiles() {
+ return Header.MCDwarfFiles;
+ }
+
+ const MCLineSection &getMCLineSections() const {
+ return MCLineSections;
+ }
+ MCLineSection &getMCLineSections() {
+ return MCLineSections;
+ }
};
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 {
// When generating dwarf for assembly source files this emits the Dwarf
// sections.
//
- static void Emit(MCStreamer *MCOS, const MCSymbol *LineSectionSymbol);
+ static void Emit(MCStreamer *MCOS);
};
// When generating dwarf for assembly source files this is the info that is
OpEscape,
OpRestore,
OpUndefined,
- OpRegister
+ OpRegister,
+ OpWindowSave
};
private:
public:
/// \brief .cfi_def_cfa defines a rule for computing CFA as: take address from
- /// \param Register and add \param Offset to it.
+ /// Register and add Offset to it.
static MCCFIInstruction createDefCfa(MCSymbol *L, unsigned Register,
int Offset) {
return MCCFIInstruction(OpDefCfa, L, Register, -Offset, "");
}
/// \brief .cfi_def_cfa_register modifies a rule for computing CFA. From now
- /// on \param Register will be used instead of the old one. Offset remains the
- /// same.
+ /// on Register will be used instead of the old one. Offset remains the same.
static MCCFIInstruction createDefCfaRegister(MCSymbol *L, unsigned Register) {
return MCCFIInstruction(OpDefCfaRegister, L, Register, 0, "");
}
return MCCFIInstruction(OpAdjustCfaOffset, L, 0, Adjustment, "");
}
- /// \brief .cfi_offset Previous value of \param Register is saved at offset
- /// \param Offset from CFA.
+ /// \brief .cfi_offset Previous value of Register is saved at offset Offset
+ /// from CFA.
static MCCFIInstruction createOffset(MCSymbol *L, unsigned Register,
int Offset) {
return MCCFIInstruction(OpOffset, L, Register, Offset, "");
}
- /// \brief .cfi_rel_offset Previous value of \param Register is saved at
- /// offset \param Offset from the current CFA register. This is transformed to
- /// .cfi_offset using the known displacement of the CFA register from the CFA.
+ /// \brief .cfi_rel_offset Previous value of Register is saved at offset
+ /// Offset from the current CFA register. This is transformed to .cfi_offset
+ /// using the known displacement of the CFA register from the CFA.
static MCCFIInstruction createRelOffset(MCSymbol *L, unsigned Register,
int Offset) {
return MCCFIInstruction(OpRelOffset, L, Register, Offset, "");
return MCCFIInstruction(OpRegister, L, Register1, Register2);
}
- /// \brief .cfi_restore says that the rule for \param Register is now the same
- /// as it was at the beginning of the function, after all initial instructions
- /// added by .cfi_startproc were executed.
+ /// \brief .cfi_window_save SPARC register window is saved.
+ static MCCFIInstruction createWindowSave(MCSymbol *L) {
+ return MCCFIInstruction(OpWindowSave, L, 0, 0, "");
+ }
+
+ /// \brief .cfi_restore says that the rule for Register is now the same as it
+ /// was at the beginning of the function, after all initial instructions added
+ /// by .cfi_startproc were executed.
static MCCFIInstruction createRestore(MCSymbol *L, unsigned Register) {
return MCCFIInstruction(OpRestore, L, Register, 0, "");
}
- /// \brief .cfi_undefined From now on the previous value of \param Register
- /// can't be restored anymore.
+ /// \brief .cfi_undefined From now on the previous value of Register can't be
+ /// restored anymore.
static MCCFIInstruction createUndefined(MCSymbol *L, unsigned Register) {
return MCCFIInstruction(OpUndefined, L, Register, 0, "");
}
- /// \brief .cfi_same_value Current value of \param Register is the same as
- /// in the previous frame. I.e., no restoration is needed.
+ /// \brief .cfi_same_value Current value of Register is the same as in the
+ /// previous frame. I.e., no restoration is needed.
static MCCFIInstruction createSameValue(MCSymbol *L, unsigned Register) {
return MCCFIInstruction(OpSameValue, L, Register, 0, "");
}
return Offset;
}
- const StringRef getValues() const {
+ StringRef getValues() const {
assert(Operation == OpEscape);
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) {}
+ : 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;
bool IsSignalFrame;
+ bool IsSimple;
};
class MCDwarfFrameEmitter {
//
// 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 Emit(MCObjectStreamer &streamer, MCAsmBackend *MAB, bool isEH);
+ static void EmitAdvanceLoc(MCObjectStreamer &Streamer, uint64_t AddrDelta);
static void EncodeAdvanceLoc(MCContext &Context, uint64_t AddrDelta,
raw_ostream &OS);
};
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