#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/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 <map>
#include <vector>
namespace llvm {
class AsmPrinter;
class DIE;
class DwarfUnits;
class DwarfAccelTable {
enum HashFunctionType {
eHashFunctionDJB = 0u
};
static uint32_t HashDJB (StringRef Str) {
uint32_t h = 5381;
for (unsigned i = 0, e = Str.size(); i != e; ++i)
h = ((h << 5) + h) + Str[i];
return h;
}
void ComputeBucketCount (void);
struct TableHeader {
uint32_t magic; uint16_t version; uint16_t hash_function; uint32_t bucket_count; uint32_t hashes_count; uint32_t header_data_len;
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) {
O << "Magic: " << format("0x%x", magic) << "\n"
<< "Version: " << version << "\n"
<< "Hash Function: " << hash_function << "\n"
<< "Bucket Count: " << bucket_count << "\n"
<< "Header Data Length: " << header_data_len << "\n";
}
void dump() { print(dbgs()); }
#endif
};
public:
enum AtomType {
eAtomTypeNULL = 0u,
eAtomTypeDIEOffset = 1u, eAtomTypeCUOffset = 2u, eAtomTypeTag = 3u, eAtomTypeNameFlags = 4u, eAtomTypeTypeFlags = 5u };
enum TypeFlags {
eTypeFlagClassMask = 0x0000000fu,
eTypeFlagClassIsImplementation = ( 1u << 1 )
};
struct Atom {
AtomType type; uint16_t 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: " << AtomTypeString(type) << "\n"
<< "Form: " << dwarf::FormEncodingString(form) << "\n";
}
void dump() {
print(dbgs());
}
#endif
};
private:
struct TableHeaderData {
uint32_t die_offset_base;
SmallVector<Atom, 1> Atoms;
TableHeaderData(ArrayRef<Atom> AtomList, uint32_t offset = 0)
: die_offset_base(offset), Atoms(AtomList.begin(), AtomList.end()) { }
#ifndef NDEBUG
void print (raw_ostream &O) {
O << "die_offset_base: " << die_offset_base << "\n";
for (size_t i = 0; i < Atoms.size(); i++)
Atoms[i].print(O);
}
void dump() {
print(dbgs());
}
#endif
};
public:
struct HashDataContents {
DIE *Die; char Flags;
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;
ArrayRef<HashDataContents*> Data; HashData(StringRef S, ArrayRef<HashDataContents*> Data)
: Str(S), Data(Data) {
HashValue = DwarfAccelTable::HashDJB(S);
}
#ifndef NDEBUG
void print(raw_ostream &O) {
O << "Name: " << Str << "\n";
O << " Hash Value: " << format("0x%x", HashValue) << "\n";
O << " Symbol: " ;
if (Sym) Sym->print(O);
else O << "<none>";
O << "\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&) LLVM_DELETED_FUNCTION;
void operator=(const DwarfAccelTable&) LLVM_DELETED_FUNCTION;
void EmitHeader(AsmPrinter *);
void EmitBuckets(AsmPrinter *);
void EmitHashes(AsmPrinter *);
void EmitOffsets(AsmPrinter *, MCSymbol *);
void EmitData(AsmPrinter *, DwarfUnits *D);
BumpPtrAllocator Allocator;
TableHeader Header;
TableHeaderData HeaderData;
std::vector<HashData*> Data;
typedef std::vector<HashDataContents*> DataArray;
typedef StringMap<DataArray, BumpPtrAllocator&> StringEntries;
StringEntries Entries;
typedef std::vector<HashData*> HashList;
typedef std::vector<HashList> BucketList;
BucketList Buckets;
HashList Hashes;
public:
DwarfAccelTable(ArrayRef<DwarfAccelTable::Atom>);
~DwarfAccelTable();
void AddName(StringRef, DIE*, char = 0);
void FinalizeTable(AsmPrinter *, const char *);
void Emit(AsmPrinter *, MCSymbol *, DwarfUnits *);
#ifndef NDEBUG
void print(raw_ostream &O);
void dump() { print(dbgs()); }
#endif
};
}
#endif