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llvm-svn: 190064
This commit is contained in:
Eric Christopher 2013-09-05 16:46:43 +00:00
parent e37f727df1
commit c126cf14f9
2 changed files with 103 additions and 99 deletions
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89
lib/CodeGen/AsmPrinter/DwarfAccelTable.cpp
View File

@ -26,25 +26,30 @@ using namespace llvm;
const char *DwarfAccelTable::Atom::AtomTypeString(enum AtomType AT) {
switch (AT) {
case eAtomTypeNULL: return "eAtomTypeNULL";
case eAtomTypeDIEOffset: return "eAtomTypeDIEOffset";
case eAtomTypeCUOffset: return "eAtomTypeCUOffset";
case eAtomTypeTag: return "eAtomTypeTag";
case eAtomTypeNameFlags: return "eAtomTypeNameFlags";
case eAtomTypeTypeFlags: return "eAtomTypeTypeFlags";
case eAtomTypeNULL:
return "eAtomTypeNULL";
case eAtomTypeDIEOffset:
return "eAtomTypeDIEOffset";
case eAtomTypeCUOffset:
return "eAtomTypeCUOffset";
case eAtomTypeTag:
return "eAtomTypeTag";
case eAtomTypeNameFlags:
return "eAtomTypeNameFlags";
case eAtomTypeTypeFlags:
return "eAtomTypeTypeFlags";
}
llvm_unreachable("invalid AtomType!");
}
// The length of the header data is always going to be 4 + 4 + 4*NumAtoms.
DwarfAccelTable::DwarfAccelTable(ArrayRef<DwarfAccelTable::Atom> atomList) :
Header(8 + (atomList.size() * 4)),
HeaderData(atomList),
Entries(Allocator) { }
DwarfAccelTable::DwarfAccelTable(ArrayRef<DwarfAccelTable::Atom> atomList)
: Header(8 + (atomList.size() * 4)), HeaderData(atomList),
Entries(Allocator) {}
DwarfAccelTable::~DwarfAccelTable() { }
DwarfAccelTable::~DwarfAccelTable() {}
void DwarfAccelTable::AddName(StringRef Name, DIE* die, char Flags) {
void DwarfAccelTable::AddName(StringRef Name, DIE *die, char Flags) {
assert(Data.empty() && "Already finalized!");
// If the string is in the list already then add this die to the list
// otherwise add a new one.
@ -59,13 +64,16 @@ void DwarfAccelTable::ComputeBucketCount(void) {
uniques[i] = Data[i]->HashValue;
array_pod_sort(uniques.begin(), uniques.end());
std::vector<uint32_t>::iterator p =
std::unique(uniques.begin(), uniques.end());
std::unique(uniques.begin(), uniques.end());
uint32_t num = std::distance(uniques.begin(), p);
// Then compute the bucket size, minimum of 1 bucket.
if (num > 1024) Header.bucket_count = num/4;
if (num > 16) Header.bucket_count = num/2;
else Header.bucket_count = num > 0 ? num : 1;
if (num > 1024)
Header.bucket_count = num / 4;
if (num > 16)
Header.bucket_count = num / 2;
else
Header.bucket_count = num > 0 ? num : 1;
Header.hashes_count = num;
}
@ -78,13 +86,13 @@ static bool compareDIEs(const DwarfAccelTable::HashDataContents *A,
void DwarfAccelTable::FinalizeTable(AsmPrinter *Asm, StringRef Prefix) {
// Create the individual hash data outputs.
for (StringMap<DataArray>::iterator
EI = Entries.begin(), EE = Entries.end(); EI != EE; ++EI) {
for (StringMap<DataArray>::iterator EI = Entries.begin(), EE = Entries.end();
EI != EE; ++EI) {
// Unique the entries.
std::stable_sort(EI->second.begin(), EI->second.end(), compareDIEs);
EI->second.erase(std::unique(EI->second.begin(), EI->second.end()),
EI->second.end());
EI->second.end());
HashData *Entry = new (Allocator) HashData(EI->getKey(), EI->second);
Data.push_back(Entry);
@ -152,7 +160,8 @@ void DwarfAccelTable::EmitBuckets(AsmPrinter *Asm) {
void DwarfAccelTable::EmitHashes(AsmPrinter *Asm) {
for (size_t i = 0, e = Buckets.size(); i < e; ++i) {
for (HashList::const_iterator HI = Buckets[i].begin(),
HE = Buckets[i].end(); HI != HE; ++HI) {
HE = Buckets[i].end();
HI != HE; ++HI) {
Asm->OutStreamer.AddComment("Hash in Bucket " + Twine(i));
Asm->EmitInt32((*HI)->HashValue);
}
@ -166,13 +175,13 @@ void DwarfAccelTable::EmitHashes(AsmPrinter *Asm) {
void DwarfAccelTable::EmitOffsets(AsmPrinter *Asm, MCSymbol *SecBegin) {
for (size_t i = 0, e = Buckets.size(); i < e; ++i) {
for (HashList::const_iterator HI = Buckets[i].begin(),
HE = Buckets[i].end(); HI != HE; ++HI) {
HE = Buckets[i].end();
HI != HE; ++HI) {
Asm->OutStreamer.AddComment("Offset in Bucket " + Twine(i));
MCContext &Context = Asm->OutStreamer.getContext();
const MCExpr *Sub =
MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create((*HI)->Sym, Context),
MCSymbolRefExpr::Create(SecBegin, Context),
Context);
const MCExpr *Sub = MCBinaryExpr::CreateSub(
MCSymbolRefExpr::Create((*HI)->Sym, Context),
MCSymbolRefExpr::Create(SecBegin, Context), Context);
Asm->OutStreamer.EmitValue(Sub, sizeof(uint32_t));
}
}
@ -185,7 +194,8 @@ void DwarfAccelTable::EmitData(AsmPrinter *Asm, DwarfUnits *D) {
uint64_t PrevHash = UINT64_MAX;
for (size_t i = 0, e = Buckets.size(); i < e; ++i) {
for (HashList::const_iterator HI = Buckets[i].begin(),
HE = Buckets[i].end(); HI != HE; ++HI) {
HE = Buckets[i].end();
HI != HE; ++HI) {
// Remember to emit the label for our offset.
Asm->OutStreamer.EmitLabel((*HI)->Sym);
Asm->OutStreamer.AddComment((*HI)->Str);
@ -193,8 +203,9 @@ void DwarfAccelTable::EmitData(AsmPrinter *Asm, DwarfUnits *D) {
D->getStringPoolSym());
Asm->OutStreamer.AddComment("Num DIEs");
Asm->EmitInt32((*HI)->Data.size());
for (ArrayRef<HashDataContents*>::const_iterator
DI = (*HI)->Data.begin(), DE = (*HI)->Data.end();
for (ArrayRef<HashDataContents *>::const_iterator
DI = (*HI)->Data.begin(),
DE = (*HI)->Data.end();
DI != DE; ++DI) {
// Emit the DIE offset
Asm->EmitInt32((*DI)->Die->getOffset());
@ -214,8 +225,7 @@ void DwarfAccelTable::EmitData(AsmPrinter *Asm, DwarfUnits *D) {
}
// Emit the entire data structure to the output file.
void DwarfAccelTable::Emit(AsmPrinter *Asm, MCSymbol *SecBegin,
DwarfUnits *D) {
void DwarfAccelTable::Emit(AsmPrinter *Asm, MCSymbol *SecBegin, DwarfUnits *D) {
// Emit the header.
EmitHeader(Asm);
@ -239,11 +249,12 @@ void DwarfAccelTable::print(raw_ostream &O) {
HeaderData.print(O);
O << "Entries: \n";
for (StringMap<DataArray>::const_iterator
EI = Entries.begin(), EE = Entries.end(); EI != EE; ++EI) {
for (StringMap<DataArray>::const_iterator EI = Entries.begin(),
EE = Entries.end();
EI != EE; ++EI) {
O << "Name: " << EI->getKeyData() << "\n";
for (DataArray::const_iterator DI = EI->second.begin(),
DE = EI->second.end();
DE = EI->second.end();
DI != DE; ++DI)
(*DI)->print(O);
}
@ -251,14 +262,14 @@ void DwarfAccelTable::print(raw_ostream &O) {
O << "Buckets and Hashes: \n";
for (size_t i = 0, e = Buckets.size(); i < e; ++i)
for (HashList::const_iterator HI = Buckets[i].begin(),
HE = Buckets[i].end(); HI != HE; ++HI)
HE = Buckets[i].end();
HI != HE; ++HI)
(*HI)->print(O);
O << "Data: \n";
for (std::vector<HashData*>::const_iterator
DI = Data.begin(), DE = Data.end(); DI != DE; ++DI)
(*DI)->print(O);
for (std::vector<HashData *>::const_iterator DI = Data.begin(),
DE = Data.end();
DI != DE; ++DI)
(*DI)->print(O);
}
#endif

113
lib/CodeGen/AsmPrinter/DwarfAccelTable.h
View File

@ -71,7 +71,7 @@ class DwarfAccelTable {
eHashFunctionDJB = 0u
};
static uint32_t HashDJB (StringRef Str) {
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];
@ -80,25 +80,24 @@ class DwarfAccelTable {
// Helper function to compute the number of buckets needed based on
// the number of unique hashes.
void ComputeBucketCount (void);
void ComputeBucketCount(void);
struct TableHeader {
uint32_t magic; // 'HASH' magic value to allow endian detection
uint16_t version; // Version number.
uint16_t hash_function; // The hash function enumeration that was used.
uint32_t bucket_count; // The number of buckets in this hash table.
uint32_t hashes_count; // The total number of unique hash values
// and hash data offsets in this table.
uint32_t header_data_len; // The bytes to skip to get to the hash
// indexes (buckets) for correct alignment.
uint32_t magic; // 'HASH' magic value to allow endian detection
uint16_t version; // Version number.
uint16_t hash_function; // The hash function enumeration that was used.
uint32_t bucket_count; // The number of buckets in this hash table.
uint32_t hashes_count; // The total number of unique hash values
// and hash data offsets in this table.
uint32_t header_data_len; // The bytes to skip to get to the hash
// indexes (buckets) for correct alignment.
// 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)
{}
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) {
@ -125,15 +124,15 @@ public:
// uint32_t atom_count
// atom_count Atoms
enum AtomType {
eAtomTypeNULL = 0u,
eAtomTypeDIEOffset = 1u, // DIE offset, check form for encoding
eAtomTypeCUOffset = 2u, // DIE offset of the compiler unit header that
// contains the item in question
eAtomTypeTag = 3u, // DW_TAG_xxx value, should be encoded as
// DW_FORM_data1 (if no tags exceed 255) or
// DW_FORM_data2.
eAtomTypeNameFlags = 4u, // Flags from enum NameFlags
eAtomTypeTypeFlags = 5u // Flags from enum TypeFlags
eAtomTypeNULL = 0u,
eAtomTypeDIEOffset = 1u, // DIE offset, check form for encoding
eAtomTypeCUOffset = 2u, // DIE offset of the compiler unit header that
// contains the item in question
eAtomTypeTag = 3u, // DW_TAG_xxx value, should be encoded as
// DW_FORM_data1 (if no tags exceed 255) or
// DW_FORM_data2.
eAtomTypeNameFlags = 4u, // Flags from enum NameFlags
eAtomTypeTypeFlags = 5u // Flags from enum TypeFlags
};
enum TypeFlags {
@ -141,7 +140,7 @@ public:
// Always set for C++, only set for ObjC if this is the
// @implementation for a class.
eTypeFlagClassIsImplementation = ( 1u << 1 )
eTypeFlagClassIsImplementation = (1u << 1)
};
// Make these public so that they can be used as a general interface to
@ -151,35 +150,31 @@ public:
uint16_t form; // DWARF DW_FORM_ defines
Atom(AtomType type, uint16_t form) : type(type), form(form) {}
static const char * AtomTypeString(enum AtomType);
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());
}
void dump() { print(dbgs()); }
#endif
};
private:
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()) { }
: die_offset_base(offset), Atoms(AtomList.begin(), AtomList.end()) {}
#ifndef NDEBUG
void print (raw_ostream &O) {
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());
}
void dump() { print(dbgs()); }
#endif
};
@ -193,37 +188,38 @@ public:
// HashData[hash_data_count]
public:
struct HashDataContents {
DIE *Die; // Offsets
DIE *Die; // Offsets
char Flags; // Specific flags to output
HashDataContents(DIE *D, char Flags) :
Die(D),
Flags(Flags) { }
#ifndef NDEBUG
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
#endif
};
private:
struct HashData {
StringRef Str;
uint32_t HashValue;
MCSymbol *Sym;
ArrayRef<HashDataContents*> Data; // offsets
HashData(StringRef S, ArrayRef<HashDataContents*> Data)
: Str(S), Data(Data) {
ArrayRef<HashDataContents *> Data; // offsets
HashData(StringRef S, ArrayRef<HashDataContents *> Data)
: Str(S), Data(Data) {
HashValue = DwarfAccelTable::HashDJB(S);
}
#ifndef NDEBUG
#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 << " 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";
@ -231,14 +227,12 @@ private:
O << " Flags: " << Data[i]->Flags << "\n";
}
}
void dump() {
print(dbgs());
}
#endif
void dump() { print(dbgs()); }
#endif
};
DwarfAccelTable(const DwarfAccelTable&) LLVM_DELETED_FUNCTION;
void operator=(const DwarfAccelTable&) LLVM_DELETED_FUNCTION;
DwarfAccelTable(const DwarfAccelTable &) LLVM_DELETED_FUNCTION;
void operator=(const DwarfAccelTable &) LLVM_DELETED_FUNCTION;
// Internal Functions
void EmitHeader(AsmPrinter *);
@ -253,24 +247,24 @@ private:
// Output Variables
TableHeader Header;
TableHeaderData HeaderData;
std::vector<HashData*> Data;
std::vector<HashData *> Data;
// String Data
typedef std::vector<HashDataContents*> DataArray;
typedef StringMap<DataArray, BumpPtrAllocator&> StringEntries;
typedef std::vector<HashDataContents *> DataArray;
typedef StringMap<DataArray, BumpPtrAllocator &> StringEntries;
StringEntries Entries;
// Buckets/Hashes/Offsets
typedef std::vector<HashData*> HashList;
typedef std::vector<HashData *> HashList;
typedef std::vector<HashList> BucketList;
BucketList Buckets;
HashList Hashes;
// Public Implementation
public:
public:
DwarfAccelTable(ArrayRef<DwarfAccelTable::Atom>);
~DwarfAccelTable();
void AddName(StringRef, DIE*, char = 0);
void AddName(StringRef, DIE *, char = 0);
void FinalizeTable(AsmPrinter *, StringRef);
void Emit(AsmPrinter *, MCSymbol *, DwarfUnits *);
#ifndef NDEBUG
@ -278,6 +272,5 @@ private:
void dump() { print(dbgs()); }
#endif
};
}
#endif