#ifndef CODEGEN_ASMPRINTER_DWARFACCELTABLE_H__
#define CODEGEN_ASMPRINTER_DWARFACCELTABLE_H__
+#include "DIE.h"
+#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/MC/MCSymbol.h"
-#include "llvm/Support/Dwarf.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/Debug.h"
+#include "llvm/Support/Dwarf.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/FormattedStream.h"
-#include <vector>
#include <map>
+#include <vector>
// The dwarf accelerator tables are an indirect hash table optimized
// for null lookup rather than access to known data. They are output into
// section contains all of the 32-bit hash values in contiguous memory, and
// the offsets contain the offset into the data area for the particular
// hash.
-//
+//
// For a lookup example, we could hash a function name and take it modulo the
// number of buckets giving us our bucket. From there we take the bucket value
// as an index into the hashes table and look at each successive hash as long
class AsmPrinter;
class DIE;
-class DwarfDebug;
-
+class DwarfUnits;
+
class DwarfAccelTable {
enum HashFunctionType {
eHashFunctionDJB = 0u
};
- static uint32_t HashDJB (const char *s) {
+ static uint32_t HashDJB (StringRef Str) {
uint32_t h = 5381;
- for (unsigned char c = *s; c; c = *++s)
- h = ((h << 5) + h) + c;
+ for (unsigned i = 0, e = Str.size(); i != e; ++i)
+ h = ((h << 5) + h) + Str[i];
return h;
}
// Helper function to compute the number of buckets needed based on
// the number of unique hashes.
void ComputeBucketCount (void);
-
+
struct TableHeader {
uint32_t magic; // 'HASH' magic value to allow endian detection
uint16_t version; // Version number.
// Also written to disk is the implementation specific header data.
static const uint32_t MagicHash = 0x48415348;
-
+
TableHeader (uint32_t data_len) :
magic (MagicHash), version (1), hash_function (eHashFunctionDJB),
bucket_count (0), hashes_count (0), header_data_len (data_len)
- {};
+ {}
#ifndef NDEBUG
void print(raw_ostream &O) {
//
// uint32_t die_offset_base
// uint32_t atom_count
- // atom_count Atoms
+ // atom_count Atoms
enum AtomType {
eAtomTypeNULL = 0u,
eAtomTypeDIEOffset = 1u, // DIE offset, check form for encoding
eAtomTypeTypeFlags = 5u // Flags from enum TypeFlags
};
+ enum TypeFlags {
+ eTypeFlagClassMask = 0x0000000fu,
+
+ // Always set for C++, only set for ObjC if this is the
+ // @implementation for a class.
+ eTypeFlagClassIsImplementation = ( 1u << 1 )
+ };
+
// Make these public so that they can be used as a general interface to
// the class.
struct Atom {
AtomType type; // enum AtomType
uint16_t form; // DWARF DW_FORM_ defines
- Atom(AtomType type, uint16_t form) : type(type), form(form) {};
+ Atom(AtomType type, uint16_t form) : type(type), form(form) {}
static const char * AtomTypeString(enum AtomType);
#ifndef NDEBUG
void print(raw_ostream &O) {
- O << "Type: " << dwarf::TagString(type) << "\n"
+ O << "Type: " << AtomTypeString(type) << "\n"
<< "Form: " << dwarf::FormEncodingString(form) << "\n";
}
void dump() {
private:
struct TableHeaderData {
-
uint32_t die_offset_base;
- std::vector<Atom> Atoms;
+ SmallVector<Atom, 1> Atoms;
+
+ TableHeaderData(ArrayRef<Atom> AtomList, uint32_t offset = 0)
+ : die_offset_base(offset), Atoms(AtomList.begin(), AtomList.end()) { }
- TableHeaderData(DwarfAccelTable::Atom Atom, uint32_t offset = 0)
- : die_offset_base(offset) {
- Atoms.push_back(Atom);
- }
-
#ifndef NDEBUG
void print (raw_ostream &O) {
O << "die_offset_base: " << die_offset_base << "\n";
// uint32_t str_offset
// uint32_t hash_data_count
// HashData[hash_data_count]
+public:
+ struct HashDataContents {
+ DIE *Die; // Offsets
+ char Flags; // Specific flags to output
+
+ HashDataContents(DIE *D, char Flags) :
+ Die(D),
+ Flags(Flags) { }
+ #ifndef NDEBUG
+ void print(raw_ostream &O) const {
+ O << " Offset: " << Die->getOffset() << "\n";
+ O << " Tag: " << dwarf::TagString(Die->getTag()) << "\n";
+ O << " Flags: " << Flags << "\n";
+ }
+ #endif
+ };
+private:
struct HashData {
StringRef Str;
uint32_t HashValue;
MCSymbol *Sym;
- std::vector<uint32_t> DIEOffsets; // offsets
- HashData(StringRef S) : Str(S) {
- HashValue = DwarfAccelTable::HashDJB(S.str().c_str());
+ ArrayRef<HashDataContents*> Data; // offsets
+ HashData(StringRef S, ArrayRef<HashDataContents*> Data)
+ : Str(S), Data(Data) {
+ HashValue = DwarfAccelTable::HashDJB(S);
}
- void addOffset(uint32_t off) { DIEOffsets.push_back(off); }
#ifndef NDEBUG
void print(raw_ostream &O) {
O << "Name: " << Str << "\n";
if (Sym) Sym->print(O);
else O << "<none>";
O << "\n";
- for (size_t i = 0; i < DIEOffsets.size(); i++)
- O << " Offset: " << DIEOffsets[i] << "\n";
+ for (size_t i = 0; i < Data.size(); i++) {
+ O << " Offset: " << Data[i]->Die->getOffset() << "\n";
+ O << " Tag: " << dwarf::TagString(Data[i]->Die->getTag()) << "\n";
+ O << " Flags: " << Data[i]->Flags << "\n";
+ }
}
void dump() {
print(dbgs());
#endif
};
- DwarfAccelTable(const DwarfAccelTable&); // DO NOT IMPLEMENT
- void operator=(const DwarfAccelTable&); // DO NOT IMPLEMENT
+ DwarfAccelTable(const DwarfAccelTable&) LLVM_DELETED_FUNCTION;
+ void operator=(const DwarfAccelTable&) LLVM_DELETED_FUNCTION;
// Internal Functions
void EmitHeader(AsmPrinter *);
void EmitBuckets(AsmPrinter *);
void EmitHashes(AsmPrinter *);
void EmitOffsets(AsmPrinter *, MCSymbol *);
- void EmitData(AsmPrinter *, DwarfDebug *D);
-
+ void EmitData(AsmPrinter *, DwarfUnits *D);
+
+ // Allocator for HashData and HashDataContents.
+ BumpPtrAllocator Allocator;
+
// Output Variables
TableHeader Header;
TableHeaderData HeaderData;
std::vector<HashData*> Data;
// String Data
- typedef std::vector<DIE*> DIEArray;
- typedef StringMap<DIEArray> StringEntries;
+ typedef std::vector<HashDataContents*> DataArray;
+ typedef StringMap<DataArray, BumpPtrAllocator&> StringEntries;
StringEntries Entries;
// Buckets/Hashes/Offsets
typedef std::vector<HashList> BucketList;
BucketList Buckets;
HashList Hashes;
-
+
// Public Implementation
public:
- DwarfAccelTable(DwarfAccelTable::Atom Atom);
+ DwarfAccelTable(ArrayRef<DwarfAccelTable::Atom>);
~DwarfAccelTable();
- void AddName(StringRef, DIE*);
- void FinalizeTable(AsmPrinter *, const char *);
- void Emit(AsmPrinter *, MCSymbol *, DwarfDebug *);
+ void AddName(StringRef, DIE*, char = 0);
+ void FinalizeTable(AsmPrinter *, StringRef);
+ void Emit(AsmPrinter *, MCSymbol *, DwarfUnits *);
#ifndef NDEBUG
void print(raw_ostream &O);
void dump() { print(dbgs()); }
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