* Cleaned up code:

- no more passing around a string pointer to set errors
  - no more returning booleans and checking for errors, we use C++ exceptions
* Broke functionality into 2 new classes, one reads from file, one from a stream
* Implemented lazy function streaming - the parser can read in a function at-a-time


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8671 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Misha Brukman 2003-09-22 23:38:23 +00:00
parent 2f00285b21
commit 12c29d10bb
4 changed files with 443 additions and 340 deletions

@ -16,7 +16,7 @@
const Type *BytecodeParser::parseTypeConstant(const unsigned char *&Buf,
const unsigned char *EndBuf) {
unsigned PrimType;
if (read_vbr(Buf, EndBuf, PrimType)) return 0;
if (read_vbr(Buf, EndBuf, PrimType)) throw Error_readvbr;
const Type *Val = 0;
if ((Val = Type::getPrimitiveType((Type::PrimitiveID)PrimType)))
@ -124,7 +124,7 @@ void BytecodeParser::refineAbstractType(const DerivedType *OldType,
// with a new resolved concrete type.
//
void debug_type_tables();
bool BytecodeParser::parseTypeConstants(const unsigned char *&Buf,
void BytecodeParser::parseTypeConstants(const unsigned char *&Buf,
const unsigned char *EndBuf,
TypeValuesListTy &Tab,
unsigned NumEntries) {
@ -139,7 +139,7 @@ bool BytecodeParser::parseTypeConstants(const unsigned char *&Buf,
//
for (unsigned i = 0; i < NumEntries; ++i) {
const Type *NewTy = parseTypeConstant(Buf, EndBuf), *OldTy = Tab[i].get();
if (NewTy == 0) return true;
if (NewTy == 0) throw std::string("Parsed invalid type.");
BCR_TRACE(4, "#" << i << ": Read Type Constant: '" << NewTy <<
"' Replacing: " << OldTy << "\n");
@ -163,11 +163,10 @@ bool BytecodeParser::parseTypeConstants(const unsigned char *&Buf,
BCR_TRACE(5, (void*)Tab[i].get() << " - " << Tab[i].get() << "\n");
}
debug_type_tables();
return false;
}
bool BytecodeParser::parseConstantValue(const unsigned char *&Buf,
void BytecodeParser::parseConstantValue(const unsigned char *&Buf,
const unsigned char *EndBuf,
const Type *Ty, Constant *&V) {
@ -175,28 +174,28 @@ bool BytecodeParser::parseConstantValue(const unsigned char *&Buf,
// a ConstantExpr can be of any type, and has no explicit value.
//
unsigned isExprNumArgs; // 0 if not expr; numArgs if is expr
if (read_vbr(Buf, EndBuf, isExprNumArgs)) return true;
if (read_vbr(Buf, EndBuf, isExprNumArgs)) throw Error_readvbr;
if (isExprNumArgs) {
// FIXME: Encoding of constant exprs could be much more compact!
unsigned Opcode;
std::vector<Constant*> ArgVec;
ArgVec.reserve(isExprNumArgs);
if (read_vbr(Buf, EndBuf, Opcode)) return true;
if (read_vbr(Buf, EndBuf, Opcode)) throw Error_readvbr;
// Read the slot number and types of each of the arguments
for (unsigned i = 0; i != isExprNumArgs; ++i) {
unsigned ArgValSlot, ArgTypeSlot;
if (read_vbr(Buf, EndBuf, ArgValSlot)) return true;
if (read_vbr(Buf, EndBuf, ArgTypeSlot)) return true;
if (read_vbr(Buf, EndBuf, ArgValSlot)) throw Error_readvbr;
if (read_vbr(Buf, EndBuf, ArgTypeSlot)) throw Error_readvbr;
const Type *ArgTy = getType(ArgTypeSlot);
if (ArgTy == 0) return true;
if (ArgTy == 0) throw std::string("Argument type slot not found.");
BCR_TRACE(4, "CE Arg " << i << ": Type: '" << ArgTy << "' slot: "
<< ArgValSlot << "\n");
// Get the arg value from its slot if it exists, otherwise a placeholder
Constant *C = getConstantValue(ArgTy, ArgValSlot);
if (C == 0) return true;
if (C == 0) throw std::string("No arg value or placeholder found.");
ArgVec.push_back(C);
}
@ -210,15 +209,15 @@ bool BytecodeParser::parseConstantValue(const unsigned char *&Buf,
} else { // All other 2-operand expressions
V = ConstantExpr::get(Opcode, ArgVec[0], ArgVec[1]);
}
return false;
return;
}
// Ok, not an ConstantExpr. We now know how to read the given type...
switch (Ty->getPrimitiveID()) {
case Type::BoolTyID: {
unsigned Val;
if (read_vbr(Buf, EndBuf, Val)) return true;
if (Val != 0 && Val != 1) return true;
if (read_vbr(Buf, EndBuf, Val)) throw Error_readvbr;
if (Val != 0 && Val != 1) throw std::string("Invalid boolean value read.");
V = ConstantBool::get(Val == 1);
break;
}
@ -227,15 +226,16 @@ bool BytecodeParser::parseConstantValue(const unsigned char *&Buf,
case Type::UShortTyID:
case Type::UIntTyID: {
unsigned Val;
if (read_vbr(Buf, EndBuf, Val)) return true;
if (!ConstantUInt::isValueValidForType(Ty, Val)) return true;
if (read_vbr(Buf, EndBuf, Val)) throw Error_readvbr;
if (!ConstantUInt::isValueValidForType(Ty, Val))
throw std::string("Invalid unsigned byte/short/int read.");
V = ConstantUInt::get(Ty, Val);
break;
}
case Type::ULongTyID: {
uint64_t Val;
if (read_vbr(Buf, EndBuf, Val)) return true;
if (read_vbr(Buf, EndBuf, Val)) throw Error_readvbr;
V = ConstantUInt::get(Ty, Val);
break;
}
@ -245,22 +245,23 @@ bool BytecodeParser::parseConstantValue(const unsigned char *&Buf,
case Type::IntTyID: {
case Type::LongTyID:
int64_t Val;
if (read_vbr(Buf, EndBuf, Val)) return true;
if (!ConstantSInt::isValueValidForType(Ty, Val)) return true;
if (read_vbr(Buf, EndBuf, Val)) throw Error_readvbr;
if (!ConstantSInt::isValueValidForType(Ty, Val))
throw std::string("Invalid signed byte/short/int/long read.");
V = ConstantSInt::get(Ty, Val);
break;
}
case Type::FloatTyID: {
float F;
if (input_data(Buf, EndBuf, &F, &F+1)) return true;
if (input_data(Buf, EndBuf, &F, &F+1)) throw Error_inputdata;
V = ConstantFP::get(Ty, F);
break;
}
case Type::DoubleTyID: {
double Val;
if (input_data(Buf, EndBuf, &Val, &Val+1)) return true;
if (input_data(Buf, EndBuf, &Val, &Val+1)) throw Error_inputdata;
V = ConstantFP::get(Ty, Val);
break;
}
@ -276,9 +277,9 @@ bool BytecodeParser::parseConstantValue(const unsigned char *&Buf,
std::vector<Constant*> Elements;
while (NumElements--) { // Read all of the elements of the constant.
unsigned Slot;
if (read_vbr(Buf, EndBuf, Slot)) return true;
if (read_vbr(Buf, EndBuf, Slot)) throw Error_readvbr;
Constant *C = getConstantValue(AT->getElementType(), Slot);
if (!C) return true;
if (!C) throw std::string("Unable to get const value of array slot.");
Elements.push_back(C);
}
V = ConstantArray::get(AT, Elements);
@ -292,9 +293,9 @@ bool BytecodeParser::parseConstantValue(const unsigned char *&Buf,
std::vector<Constant *> Elements;
for (unsigned i = 0; i < ET.size(); ++i) {
unsigned Slot;
if (read_vbr(Buf, EndBuf, Slot)) return true;
if (read_vbr(Buf, EndBuf, Slot)) throw Error_readvbr;
Constant *C = getConstantValue(ET[i], Slot);
if (!C) return true;
if (!C) throw std::string("Could not read const value in struct slot.");
Elements.push_back(C);
}
@ -308,7 +309,7 @@ bool BytecodeParser::parseConstantValue(const unsigned char *&Buf,
if (HasImplicitZeroInitializer)
SubClass = 1;
else
if (read_vbr(Buf, EndBuf, SubClass)) return true;
if (read_vbr(Buf, EndBuf, SubClass)) throw Error_readvbr;
switch (SubClass) {
case 0: // ConstantPointerNull value...
@ -317,19 +318,20 @@ bool BytecodeParser::parseConstantValue(const unsigned char *&Buf,
case 1: { // ConstantPointerRef value...
unsigned Slot;
if (read_vbr(Buf, EndBuf, Slot)) return true;
if (read_vbr(Buf, EndBuf, Slot)) throw Error_readvbr;
BCR_TRACE(4, "CPR: Type: '" << Ty << "' slot: " << Slot << "\n");
// Check to see if we have already read this global variable...
Value *Val = getValue(PT, Slot, false);
GlobalValue *GV;
if (Val) {
if (!(GV = dyn_cast<GlobalValue>(Val))) return true;
if (!(GV = dyn_cast<GlobalValue>(Val)))
throw std::string("Value of ConstantPointerRef not in ValueTable!");
BCR_TRACE(5, "Value Found in ValueTable!\n");
} else if (RevisionNum > 0) {
// Revision #0 could have forward references to globals that were weird.
// We got rid of this in subsequent revs.
return true;
throw std::string("Forward references to globals not allowed.");
} else { // Nope... find or create a forward ref. for it
GlobalRefsType::iterator I = GlobalRefs.find(std::make_pair(PT, Slot));
@ -359,7 +361,7 @@ bool BytecodeParser::parseConstantValue(const unsigned char *&Buf,
default:
BCR_TRACE(5, "UNKNOWN Pointer Constant Type!\n");
return true;
throw std::string("Unknown pointer constant type.");
}
break;
}
@ -368,41 +370,41 @@ bool BytecodeParser::parseConstantValue(const unsigned char *&Buf,
std::cerr << __FILE__ << ":" << __LINE__
<< ": Don't know how to deserialize constant value of type '"
<< Ty->getName() << "'\n";
return true;
throw std::string("Don't know how to deserialize constant value of type '"+
Ty->getName());
}
return false;
}
bool BytecodeParser::ParseGlobalTypes(const unsigned char *&Buf,
void BytecodeParser::ParseGlobalTypes(const unsigned char *&Buf,
const unsigned char *EndBuf) {
ValueTable T;
return ParseConstantPool(Buf, EndBuf, T, ModuleTypeValues);
ParseConstantPool(Buf, EndBuf, T, ModuleTypeValues);
}
bool BytecodeParser::ParseConstantPool(const unsigned char *&Buf,
void BytecodeParser::ParseConstantPool(const unsigned char *&Buf,
const unsigned char *EndBuf,
ValueTable &Tab,
TypeValuesListTy &TypeTab) {
ValueTable &Tab,
TypeValuesListTy &TypeTab) {
while (Buf < EndBuf) {
unsigned NumEntries, Typ;
if (read_vbr(Buf, EndBuf, NumEntries) ||
read_vbr(Buf, EndBuf, Typ)) return true;
read_vbr(Buf, EndBuf, Typ)) throw Error_readvbr;
const Type *Ty = getType(Typ);
if (Ty == 0) return true;
if (Ty == 0) throw std::string("Invalid type read.");
BCR_TRACE(3, "Type: '" << Ty << "' NumEntries: " << NumEntries << "\n");
if (Typ == Type::TypeTyID) {
if (parseTypeConstants(Buf, EndBuf, TypeTab, NumEntries)) return true;
parseTypeConstants(Buf, EndBuf, TypeTab, NumEntries);
} else {
for (unsigned i = 0; i < NumEntries; ++i) {
Constant *C;
Constant *C;
int Slot;
if (parseConstantValue(Buf, EndBuf, Ty, C)) return true;
parseConstantValue(Buf, EndBuf, Ty, C);
assert(C && "parseConstantValue returned NULL!");
BCR_TRACE(4, "Read Constant: '" << *C << "'\n");
if ((Slot = insertValue(C, Tab)) == -1) return true;
BCR_TRACE(4, "Read Constant: '" << *C << "'\n");
if ((Slot = insertValue(C, Tab)) == -1)
throw std::string("Could not insert value into ValueTable.");
// If we are reading a function constant table, make sure that we adjust
// the slot number to be the real global constant number.
@ -414,6 +416,5 @@ bool BytecodeParser::ParseConstantPool(const unsigned char *&Buf,
}
}
if (Buf > EndBuf) return true;
return false;
if (Buf > EndBuf) throw std::string("Read past end of buffer.");
}

@ -11,37 +11,44 @@
//===----------------------------------------------------------------------===//
#include "ReaderInternals.h"
#include "Config/sys/mman.h"
#include "llvm/Bytecode/Reader.h"
#include "llvm/Bytecode/Format.h"
#include "llvm/Module.h"
#include "llvm/Constants.h"
#include "llvm/iPHINode.h"
#include "llvm/iOther.h"
#include "Config/sys/types.h"
#include "Config/sys/stat.h"
#include "Config/fcntl.h"
#include "llvm/Module.h"
#include "Support/StringExtras.h"
#include "Config/unistd.h"
#include "Config/sys/mman.h"
#include "Config/sys/stat.h"
#include "Config/sys/types.h"
#include <algorithm>
#include <memory>
bool BytecodeParser::getTypeSlot(const Type *Ty, unsigned &Slot) {
#define CHECK_ALIGN32(begin,end) \
if (align32(begin,end)) \
throw std::string("Alignment error: Reader.cpp:" + \
utostr((unsigned)__LINE__));
void
BytecodeParser::getTypeSlot(const Type *Ty, unsigned &Slot) {
if (Ty->isPrimitiveType()) {
Slot = Ty->getPrimitiveID();
} else {
// Check the function level types first...
TypeValuesListTy::iterator I = find(FunctionTypeValues.begin(),
FunctionTypeValues.end(), Ty);
FunctionTypeValues.end(), Ty);
if (I != FunctionTypeValues.end()) {
Slot = FirstDerivedTyID+ModuleTypeValues.size()+
(&*I - &FunctionTypeValues[0]);
Slot = FirstDerivedTyID + ModuleTypeValues.size() +
(&*I - &FunctionTypeValues[0]);
} else {
I = find(ModuleTypeValues.begin(), ModuleTypeValues.end(), Ty);
if (I == ModuleTypeValues.end()) return true; // Didn't find type!
if (I == ModuleTypeValues.end())
throw std::string("Didn't find type in ModuleTypeValues.");
Slot = FirstDerivedTyID + (&*I - &ModuleTypeValues[0]);
}
}
//cerr << "getTypeSlot '" << Ty->getName() << "' = " << Slot << "\n";
return false;
}
const Type *BytecodeParser::getType(unsigned ID) {
@ -61,7 +68,7 @@ int BytecodeParser::insertValue(Value *Val, ValueTable &ValueTab) {
!cast<Constant>(Val)->isNullValue()) &&
"Cannot read null values from bytecode!");
unsigned type;
if (getTypeSlot(Val->getType(), type)) return -1;
getTypeSlot(Val->getType(), type);
assert(type != Type::TypeTyID && "Types should never be insertValue'd!");
if (ValueTab.size() <= type) {
@ -72,11 +79,11 @@ int BytecodeParser::insertValue(Value *Val, ValueTable &ValueTab) {
}
//cerr << "insertValue Values[" << type << "][" << ValueTab[type].size()
// << "] = " << Val << "\n";
// << "] = " << Val << "\n";
ValueTab[type]->push_back(Val);
bool HasOffset = HasImplicitZeroInitializer &&
!Val->getType()->isPrimitiveType();
!Val->getType()->isPrimitiveType();
return ValueTab[type]->size()-1 + HasOffset;
}
@ -86,9 +93,8 @@ void BytecodeParser::setValueTo(ValueTable &ValueTab, unsigned Slot,
Value *Val) {
assert(&ValueTab == &ModuleValues && "Can only setValueTo on Module values!");
unsigned type;
if (getTypeSlot(Val->getType(), type))
assert(0 && "getTypeSlot failed!");
getTypeSlot(Val->getType(), type);
assert((!HasImplicitZeroInitializer || Slot != 0) &&
"Cannot change zero init");
assert(type < ValueTab.size() && Slot <= ValueTab[type]->size());
@ -98,10 +104,9 @@ void BytecodeParser::setValueTo(ValueTable &ValueTab, unsigned Slot,
Value *BytecodeParser::getValue(const Type *Ty, unsigned oNum, bool Create) {
unsigned Num = oNum;
unsigned type; // The type plane it lives in...
getTypeSlot(Ty, type);
if (getTypeSlot(Ty, type)) return 0;
if (type == Type::TypeTyID) { // The 'type' plane has implicit values
if (type == Type::TypeTyID) { // The 'type' plane has implicit values
assert(Create == false);
if (Num < Type::NumPrimitiveIDs) {
const Type *T = Type::getPrimitiveType((Type::PrimitiveID)Num);
@ -111,11 +116,11 @@ Value *BytecodeParser::getValue(const Type *Ty, unsigned oNum, bool Create) {
// Otherwise, derived types need offset...
Num -= FirstDerivedTyID;
// Is it a module level type?
// Is it a module-level type?
if (Num < ModuleTypeValues.size())
return (Value*)ModuleTypeValues[Num].get();
// Nope, is it a function level type?
// Nope, is it a function-level type?
Num -= ModuleTypeValues.size();
if (Num < FunctionTypeValues.size())
return (Value*)FunctionTypeValues[Num].get();
@ -184,8 +189,7 @@ Constant *BytecodeParser::getConstantValue(const Type *Ty, unsigned Slot) {
}
bool BytecodeParser::postResolveValues(ValueTable &ValTab) {
bool Error = false;
void BytecodeParser::postResolveValues(ValueTable &ValTab) {
while (!ValTab.empty()) {
ValueList &DL = *ValTab.back();
ValTab.pop_back();
@ -197,83 +201,77 @@ bool BytecodeParser::postResolveValues(ValueTable &ValTab) {
Value *NewDef = getValue(D->getType(), IDNumber, false);
if (NewDef == 0) {
Error = true; // Unresolved thinger
std::cerr << "Unresolvable reference found: <"
<< *D->getType() << ">:" << IDNumber <<"!\n";
throw std::string("Unresolvable reference found: <" +
D->getType()->getName() + ">:" +utostr(IDNumber)+".");
} else {
// Fixup all of the uses of this placeholder def...
// Fixup all of the uses of this placeholder def...
D->replaceAllUsesWith(NewDef);
// Now that all the uses are gone, delete the placeholder...
// If we couldn't find a def (error case), then leak a little
delete D; // memory, 'cause otherwise we can't remove all uses!
delete D; // memory, 'cause otherwise we can't remove all uses!
}
}
delete &DL;
}
return Error;
}
bool BytecodeParser::ParseBasicBlock(const unsigned char *&Buf,
const unsigned char *EndBuf,
BasicBlock *&BB) {
BB = new BasicBlock();
std::auto_ptr<BasicBlock>
BytecodeParser::ParseBasicBlock(const unsigned char *&Buf,
const unsigned char *EndBuf) {
std::auto_ptr<BasicBlock> BB(new BasicBlock());
while (Buf < EndBuf) {
Instruction *Inst;
if (ParseInstruction(Buf, EndBuf, Inst)) {
delete BB;
return true;
ParseInstruction(Buf, EndBuf, Inst);
if (Inst == 0) { throw std::string("Could not parse Instruction."); }
if (insertValue(Inst, Values) == -1) {
throw std::string("Could not insert value.");
}
if (Inst == 0) { delete BB; return true; }
if (insertValue(Inst, Values) == -1) { delete BB; return true; }
BB->getInstList().push_back(Inst);
BCR_TRACE(4, Inst);
}
return false;
return BB;
}
bool BytecodeParser::ParseSymbolTable(const unsigned char *&Buf,
void BytecodeParser::ParseSymbolTable(const unsigned char *&Buf,
const unsigned char *EndBuf,
SymbolTable *ST) {
SymbolTable *ST) {
while (Buf < EndBuf) {
// Symtab block header: [num entries][type id number]
unsigned NumEntries, Typ;
if (read_vbr(Buf, EndBuf, NumEntries) ||
read_vbr(Buf, EndBuf, Typ)) return true;
read_vbr(Buf, EndBuf, Typ)) throw Error_readvbr;
const Type *Ty = getType(Typ);
if (Ty == 0) return true;
if (Ty == 0) throw std::string("Invalid type read in symbol table.");
BCR_TRACE(3, "Plane Type: '" << Ty << "' with " << NumEntries <<
" entries\n");
" entries\n");
for (unsigned i = 0; i < NumEntries; ++i) {
// Symtab entry: [def slot #][name]
unsigned slot;
if (read_vbr(Buf, EndBuf, slot)) return true;
if (read_vbr(Buf, EndBuf, slot)) throw Error_readvbr;
std::string Name;
if (read(Buf, EndBuf, Name, false)) // Not aligned...
return true;
throw std::string("Buffer not aligned.");
Value *V = getValue(Ty, slot, false); // Find mapping...
if (V == 0) {
BCR_TRACE(3, "FAILED LOOKUP: Slot #" << slot << "\n");
return true;
BCR_TRACE(3, "FAILED LOOKUP: Slot #" << slot << "\n");
throw std::string("Failed value look-up.");
}
BCR_TRACE(4, "Map: '" << Name << "' to #" << slot << ":" << *V;
if (!isa<Instruction>(V)) std::cerr << "\n");
if (!isa<Instruction>(V)) std::cerr << "\n");
V->setName(Name, ST);
}
}
if (Buf > EndBuf) return true;
return false;
if (Buf > EndBuf) throw std::string("Tried to read past end of buffer.");
}
void BytecodeParser::ResolveReferencesToValue(Value *NewV, unsigned Slot) {
@ -295,114 +293,124 @@ void BytecodeParser::ResolveReferencesToValue(Value *NewV, unsigned Slot) {
GlobalRefs.erase(I); // Remove the map entry for it
}
void
BytecodeParser::ParseFunction(const unsigned char *&Buf,
const unsigned char *EndBuf) {
if (FunctionSignatureList.empty())
throw std::string("FunctionSignatureList empty!");
bool BytecodeParser::ParseFunction(const unsigned char *&Buf,
const unsigned char *EndBuf) {
// Clear out the local values table...
if (FunctionSignatureList.empty()) {
Error = "Function found, but FunctionSignatureList empty!";
return true; // Unexpected function!
}
Function *F = FunctionSignatureList.back().first;
unsigned FunctionSlot = FunctionSignatureList.back().second;
FunctionSignatureList.pop_back();
// Save the information for future reading of the function
LazyFunctionInfo *LFI = new LazyFunctionInfo();
LFI->Buf = Buf; LFI->EndBuf = EndBuf; LFI->FunctionSlot = FunctionSlot;
LazyFunctionLoadMap[F] = LFI;
// Pretend we've `parsed' this function
Buf = EndBuf;
}
void BytecodeParser::materializeFunction(Function* F) {
// Find {start, end} pointers and slot in the map. If not there, we're done.
std::map<Function*, LazyFunctionInfo*>::iterator Fi =
LazyFunctionLoadMap.find(F);
if (Fi == LazyFunctionLoadMap.end()) return;
LazyFunctionInfo *LFI = Fi->second;
const unsigned char *Buf = LFI->Buf;
const unsigned char *EndBuf = LFI->EndBuf;
unsigned FunctionSlot = LFI->FunctionSlot;
LazyFunctionLoadMap.erase(Fi);
delete LFI;
GlobalValue::LinkageTypes Linkage = GlobalValue::ExternalLinkage;
if (!hasInternalMarkerOnly) {
unsigned LinkageType;
if (read_vbr(Buf, EndBuf, LinkageType)) return true;
if (LinkageType & ~0x3) return true;
if (read_vbr(Buf, EndBuf, LinkageType))
throw std::string("ParseFunction: Error reading from buffer.");
if (LinkageType & ~0x3)
throw std::string("Invalid linkage type for Function.");
Linkage = (GlobalValue::LinkageTypes)LinkageType;
} else {
// We used to only support two linkage models: internal and external
unsigned isInternal;
if (read_vbr(Buf, EndBuf, isInternal)) return true;
if (read_vbr(Buf, EndBuf, isInternal))
throw std::string("ParseFunction: Error reading from buffer.");
if (isInternal) Linkage = GlobalValue::InternalLinkage;
}
Function *F = FunctionSignatureList.back().first;
unsigned FunctionSlot = FunctionSignatureList.back().second;
FunctionSignatureList.pop_back();
F->setLinkage(Linkage);
const FunctionType::ParamTypes &Params =F->getFunctionType()->getParamTypes();
Function::aiterator AI = F->abegin();
for (FunctionType::ParamTypes::const_iterator It = Params.begin();
It != Params.end(); ++It, ++AI) {
if (insertValue(AI, Values) == -1) {
Error = "Error reading function arguments!\n";
return true;
}
if (insertValue(AI, Values) == -1)
throw std::string("Error reading function arguments!");
}
while (Buf < EndBuf) {
unsigned Type, Size;
const unsigned char *OldBuf = Buf;
if (readBlock(Buf, EndBuf, Type, Size)) {
Error = "Error reading Function level block!";
return true;
}
readBlock(Buf, EndBuf, Type, Size);
switch (Type) {
case BytecodeFormat::ConstantPool:
case BytecodeFormat::ConstantPool: {
BCR_TRACE(2, "BLOCK BytecodeFormat::ConstantPool: {\n");
if (ParseConstantPool(Buf, Buf+Size, Values, FunctionTypeValues))
return true;
ParseConstantPool(Buf, Buf+Size, Values, FunctionTypeValues);
break;
}
case BytecodeFormat::BasicBlock: {
BCR_TRACE(2, "BLOCK BytecodeFormat::BasicBlock: {\n");
BasicBlock *BB;
if (ParseBasicBlock(Buf, Buf+Size, BB) ||
insertValue(BB, Values) == -1)
return true; // Parse error... :(
std::auto_ptr<BasicBlock> BB = ParseBasicBlock(Buf, Buf+Size);
if (!BB.get() || insertValue(BB.get(), Values) == -1)
throw std::string("Parse error: BasicBlock");
F->getBasicBlockList().push_back(BB);
F->getBasicBlockList().push_back(BB.release());
break;
}
case BytecodeFormat::SymbolTable:
case BytecodeFormat::SymbolTable: {
BCR_TRACE(2, "BLOCK BytecodeFormat::SymbolTable: {\n");
if (ParseSymbolTable(Buf, Buf+Size, &F->getSymbolTable()))
return true;
ParseSymbolTable(Buf, Buf+Size, &F->getSymbolTable());
break;
}
default:
BCR_TRACE(2, "BLOCK <unknown>:ignored! {\n");
Buf += Size;
if (OldBuf > Buf) return true; // Wrap around!
if (OldBuf > Buf)
throw std::string("Wrapped around reading bytecode.");
break;
}
BCR_TRACE(2, "} end block\n");
if (align32(Buf, EndBuf)) {
Error = "Error aligning Function level block!";
return true; // Malformed bc file, read past end of block.
}
// Malformed bc file if read past end of block.
CHECK_ALIGN32(Buf, EndBuf);
}
if (postResolveValues(LateResolveValues)) {
Error = "Error resolving function values!";
return true; // Unresolvable references!
}
// Check for unresolvable references
postResolveValues(LateResolveValues);
ResolveReferencesToValue(F, FunctionSlot);
//ResolveReferencesToValue(F, FunctionSlot);
// Clear out function level types...
// Clear out function-level types...
FunctionTypeValues.clear();
freeTable(Values);
return false;
}
bool BytecodeParser::ParseModuleGlobalInfo(const unsigned char *&Buf,
const unsigned char *End){
if (!FunctionSignatureList.empty()) {
Error = "Two ModuleGlobalInfo packets found!";
return true; // Two ModuleGlobal blocks?
}
void BytecodeParser::ParseModuleGlobalInfo(const unsigned char *&Buf,
const unsigned char *End) {
if (!FunctionSignatureList.empty())
throw std::string("Two ModuleGlobalInfo packets found!");
// Read global variables...
unsigned VarType;
if (read_vbr(Buf, End, VarType)) return true;
if (read_vbr(Buf, End, VarType)) throw Error_readvbr;
while (VarType != Type::VoidTyID) { // List is terminated by Void
unsigned SlotNo;
GlobalValue::LinkageTypes Linkage;
@ -421,10 +429,9 @@ bool BytecodeParser::ParseModuleGlobalInfo(const unsigned char *&Buf,
}
const Type *Ty = getType(SlotNo);
if (!Ty || !isa<PointerType>(Ty)) {
Error = "Global not pointer type! Ty = " + Ty->getDescription();
return true;
}
if (!Ty || !isa<PointerType>(Ty))
throw std::string("Global not pointer type! Ty = " +
Ty->getDescription());
const Type *ElTy = cast<PointerType>(Ty)->getElementType();
@ -432,27 +439,27 @@ bool BytecodeParser::ParseModuleGlobalInfo(const unsigned char *&Buf,
GlobalVariable *GV = new GlobalVariable(ElTy, VarType & 1, Linkage,
0, "", TheModule);
int DestSlot = insertValue(GV, ModuleValues);
if (DestSlot == -1) return true;
if (DestSlot == -1) throw Error_DestSlot;
BCR_TRACE(2, "Global Variable of type: " << *Ty << "\n");
ResolveReferencesToValue(GV, (unsigned)DestSlot);
if (VarType & 2) { // Does it have an initializer?
unsigned InitSlot;
if (read_vbr(Buf, End, InitSlot)) return true;
if (read_vbr(Buf, End, InitSlot)) throw Error_readvbr;
GlobalInits.push_back(std::make_pair(GV, InitSlot));
}
if (read_vbr(Buf, End, VarType)) return true;
if (read_vbr(Buf, End, VarType)) throw Error_readvbr;
}
// Read the function objects for all of the functions that are coming
unsigned FnSignature;
if (read_vbr(Buf, End, FnSignature)) return true;
if (read_vbr(Buf, End, FnSignature)) throw Error_readvbr;
while (FnSignature != Type::VoidTyID) { // List is terminated by Void
const Type *Ty = getType(FnSignature);
if (!Ty || !isa<PointerType>(Ty) ||
!isa<FunctionType>(cast<PointerType>(Ty)->getElementType())) {
Error = "Function not ptr to func type! Ty = " + Ty->getDescription();
return true;
throw std::string("Function not ptr to func type! Ty = " +
Ty->getDescription());
}
// We create functions by passing the underlying FunctionType to create...
@ -467,7 +474,7 @@ bool BytecodeParser::ParseModuleGlobalInfo(const unsigned char *&Buf,
Function *Func = new Function(cast<FunctionType>(Ty),
GlobalValue::InternalLinkage, "", TheModule);
int DestSlot = insertValue(Func, ModuleValues);
if (DestSlot == -1) return true;
if (DestSlot == -1) throw Error_DestSlot;
ResolveReferencesToValue(Func, (unsigned)DestSlot);
// Keep track of this information in a list that is emptied as functions are
@ -475,11 +482,11 @@ bool BytecodeParser::ParseModuleGlobalInfo(const unsigned char *&Buf,
//
FunctionSignatureList.push_back(std::make_pair(Func, DestSlot));
if (read_vbr(Buf, End, FnSignature)) return true;
if (read_vbr(Buf, End, FnSignature)) throw Error_readvbr;
BCR_TRACE(2, "Function of type: " << Ty << "\n");
}
if (align32(Buf, End)) return true;
CHECK_ALIGN32(Buf, End);
// Now that the function signature list is set up, reverse it so that we can
// remove elements efficiently from the back of the vector.
@ -489,13 +496,12 @@ bool BytecodeParser::ParseModuleGlobalInfo(const unsigned char *&Buf,
// we don't understand, so we transparently ignore them.
//
Buf = End;
return false;
}
bool BytecodeParser::ParseVersionInfo(const unsigned char *&Buf,
void BytecodeParser::ParseVersionInfo(const unsigned char *&Buf,
const unsigned char *EndBuf) {
unsigned Version;
if (read_vbr(Buf, EndBuf, Version)) return true;
if (read_vbr(Buf, EndBuf, Version)) throw Error_readvbr;
// Unpack version number: low four bits are for flags, top bits = version
Module::Endianness Endianness;
@ -519,7 +525,7 @@ bool BytecodeParser::ParseVersionInfo(const unsigned char *&Buf,
// only valid with a 14 in the flags values. Also, it does not support
// encoding zero initializers for arrays compactly.
//
if (Version != 14) return true; // Unknown revision 0 flags?
if (Version != 14) throw std::string("Unknown revision 0 flags?");
HasImplicitZeroInitializer = false;
Endianness = Module::BigEndian;
PointerSize = Module::Pointer64;
@ -536,8 +542,7 @@ bool BytecodeParser::ParseVersionInfo(const unsigned char *&Buf,
// having internal and external.
break;
default:
Error = "Unknown bytecode version number!";
return true;
throw std::string("Unknown bytecode version number!");
}
if (hasNoEndianness) Endianness = Module::AnyEndianness;
@ -549,66 +554,61 @@ bool BytecodeParser::ParseVersionInfo(const unsigned char *&Buf,
BCR_TRACE(1, "Endianness/PointerSize = " << Endianness << ","
<< PointerSize << "\n");
BCR_TRACE(1, "HasImplicitZeroInit = " << HasImplicitZeroInitializer << "\n");
return false;
}
bool BytecodeParser::ParseModule(const unsigned char *Buf,
void BytecodeParser::ParseModule(const unsigned char *Buf,
const unsigned char *EndBuf) {
unsigned Type, Size;
if (readBlock(Buf, EndBuf, Type, Size)) return true;
if (Type != BytecodeFormat::Module || Buf+Size != EndBuf) {
Error = "Expected Module packet!";
return true; // Hrm, not a class?
}
readBlock(Buf, EndBuf, Type, Size);
if (Type != BytecodeFormat::Module || Buf+Size != EndBuf)
throw std::string("Expected Module packet! B: "+
utostr((unsigned)(intptr_t)Buf) + ", S: "+utostr(Size)+
" E: "+utostr((unsigned)(intptr_t)EndBuf)); // Hrm, not a class?
BCR_TRACE(0, "BLOCK BytecodeFormat::Module: {\n");
FunctionSignatureList.clear(); // Just in case...
// Read into instance variables...
if (ParseVersionInfo(Buf, EndBuf)) return true;
if (align32(Buf, EndBuf)) return true;
ParseVersionInfo(Buf, EndBuf);
CHECK_ALIGN32(Buf, EndBuf);
while (Buf < EndBuf) {
const unsigned char *OldBuf = Buf;
if (readBlock(Buf, EndBuf, Type, Size)) return true;
readBlock(Buf, EndBuf, Type, Size);
switch (Type) {
case BytecodeFormat::GlobalTypePlane:
BCR_TRACE(1, "BLOCK BytecodeFormat::GlobalTypePlane: {\n");
if (ParseGlobalTypes(Buf, Buf+Size)) return true;
ParseGlobalTypes(Buf, Buf+Size);
break;
case BytecodeFormat::ModuleGlobalInfo:
BCR_TRACE(1, "BLOCK BytecodeFormat::ModuleGlobalInfo: {\n");
if (ParseModuleGlobalInfo(Buf, Buf+Size)) return true;
ParseModuleGlobalInfo(Buf, Buf+Size);
break;
case BytecodeFormat::ConstantPool:
BCR_TRACE(1, "BLOCK BytecodeFormat::ConstantPool: {\n");
if (ParseConstantPool(Buf, Buf+Size, ModuleValues, ModuleTypeValues))
return true;
ParseConstantPool(Buf, Buf+Size, ModuleValues, ModuleTypeValues);
break;
case BytecodeFormat::Function: {
BCR_TRACE(1, "BLOCK BytecodeFormat::Function: {\n");
if (ParseFunction(Buf, Buf+Size))
return true; // Error parsing function
ParseFunction(Buf, Buf+Size);
break;
}
case BytecodeFormat::SymbolTable:
BCR_TRACE(1, "BLOCK BytecodeFormat::SymbolTable: {\n");
if (ParseSymbolTable(Buf, Buf+Size, &TheModule->getSymbolTable()))
return true;
ParseSymbolTable(Buf, Buf+Size, &TheModule->getSymbolTable());
break;
default:
Error = "Expected Module Block!";
Buf += Size;
if (OldBuf > Buf) return true; // Wrap around!
if (OldBuf > Buf) throw std::string("Expected Module Block!");
break;
}
BCR_TRACE(1, "} end block\n");
if (align32(Buf, EndBuf)) return true;
CHECK_ALIGN32(Buf, EndBuf);
}
// After the module constant pool has been read, we can safely initialize
@ -620,137 +620,36 @@ bool BytecodeParser::ParseModule(const unsigned char *Buf,
// Look up the initializer value...
if (Value *V = getValue(GV->getType()->getElementType(), Slot, false)) {
if (GV->hasInitializer()) return true;
if (GV->hasInitializer())
throw std::string("Global *already* has an initializer?!");
GV->setInitializer(cast<Constant>(V));
} else
return true;
throw std::string("Cannot find initializer value.");
}
if (!FunctionSignatureList.empty()) { // Expected more functions!
Error = "Function expected, but bytecode stream at end!";
return true;
}
if (!FunctionSignatureList.empty())
throw std::string("Function expected, but bytecode stream ended!");
BCR_TRACE(0, "} end block\n\n");
return false;
}
static inline Module *Error(std::string *ErrorStr, const char *Message) {
if (ErrorStr) *ErrorStr = Message;
return 0;
}
Module *BytecodeParser::ParseBytecode(const unsigned char *Buf,
const unsigned char *EndBuf,
const std::string &ModuleID) {
void
BytecodeParser::ParseBytecode(const unsigned char *Buf, unsigned Length,
const std::string &ModuleID) {
unsigned Sig;
unsigned char *EndBuf = (unsigned char*)(Buf + Length);
// Read and check signature...
if (read(Buf, EndBuf, Sig) ||
Sig != ('l' | ('l' << 8) | ('v' << 16) | 'm' << 24))
return ::Error(&Error, "Invalid bytecode signature!");
Sig != ('l' | ('l' << 8) | ('v' << 16) | ('m' << 24)))
throw std::string("Invalid bytecode signature!");
TheModule = new Module(ModuleID);
if (ParseModule(Buf, EndBuf)) {
try {
ParseModule(Buf, EndBuf);
} catch (std::string &Error) {
freeState(); // Must destroy handles before deleting module!
delete TheModule;
TheModule = 0;
throw Error;
}
return TheModule;
}
Module *ParseBytecodeBuffer(const unsigned char *Buffer, unsigned Length,
const std::string &ModuleID, std::string *ErrorStr){
BytecodeParser Parser;
unsigned char *PtrToDelete = 0;
if ((intptr_t)Buffer & 3) { // If the buffer is not 4 byte aligned...
// Allocate a new buffer to hold the bytecode...
PtrToDelete = new unsigned char[Length+4];
unsigned Offset = 4-((intptr_t)PtrToDelete & 3); // Make sure it's aligned
memcpy(PtrToDelete+Offset, Buffer, Length); // Copy it over
Buffer = PtrToDelete+Offset;
}
Module *R = Parser.ParseBytecode(Buffer, Buffer+Length, ModuleID);
if (ErrorStr) *ErrorStr = Parser.getError();
delete [] PtrToDelete; // Delete alignment buffer if necessary
return R;
}
/// FDHandle - Simple handle class to make sure a file descriptor gets closed
/// when the object is destroyed.
class FDHandle {
int FD;
public:
FDHandle(int fd) : FD(fd) {}
operator int() const { return FD; }
~FDHandle() {
if (FD != -1) close(FD);
}
};
// Parse and return a class file...
//
Module *ParseBytecodeFile(const std::string &Filename, std::string *ErrorStr) {
Module *Result = 0;
if (Filename != std::string("-")) { // Read from a file...
FDHandle FD = open(Filename.c_str(), O_RDONLY);
if (FD == -1)
return Error(ErrorStr, "Error opening file!");
// Stat the file to get its length...
struct stat StatBuf;
if (fstat(FD, &StatBuf) == -1 || StatBuf.st_size == 0)
return Error(ErrorStr, "Error stat'ing file!");
// mmap in the file all at once...
int Length = StatBuf.st_size;
unsigned char *Buffer = (unsigned char*)mmap(0, Length, PROT_READ,
MAP_PRIVATE, FD, 0);
if (Buffer == (unsigned char*)MAP_FAILED)
return Error(ErrorStr, "Error mmapping file!");
// Parse the bytecode we mmapped in
Result = ParseBytecodeBuffer(Buffer, Length, Filename, ErrorStr);
// Unmmap the bytecode...
munmap((char*)Buffer, Length);
} else { // Read from stdin
int BlockSize;
unsigned char Buffer[4096*4];
std::vector<unsigned char> FileData;
// Read in all of the data from stdin, we cannot mmap stdin...
while ((BlockSize = read(0 /*stdin*/, Buffer, 4096*4))) {
if (BlockSize == -1)
return Error(ErrorStr, "Error reading from stdin!");
FileData.insert(FileData.end(), Buffer, Buffer+BlockSize);
}
if (FileData.empty())
return Error(ErrorStr, "Standard Input empty!");
#define ALIGN_PTRS 0
#if ALIGN_PTRS
unsigned char *Buf =
(unsigned char*)mmap(0, FileData.size(), PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
assert((Buf != (unsigned char*)-1) && "mmap returned error!");
memcpy(Buf, &FileData[0], FileData.size());
#else
unsigned char *Buf = &FileData[0];
#endif
Result = ParseBytecodeBuffer(Buf, FileData.size(), "<stdin>", ErrorStr);
#if ALIGN_PTRS
munmap((char*)Buf, FileData.size()); // Free mmap'd data area
#endif
}
return Result;
}

@ -7,17 +7,20 @@
#ifndef READER_INTERNALS_H
#define READER_INTERNALS_H
#include "llvm/Bytecode/Primitives.h"
#include "llvm/Constant.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Function.h"
#include "llvm/Constant.h"
#include "llvm/ModuleProvider.h"
#include "llvm/Bytecode/Primitives.h"
#include <utility>
#include <map>
#include <memory>
class Module;
// Enable to trace to figure out what the heck is going on when parsing fails
//#define TRACE_LEVEL 10
#if TRACE_LEVEL // ByteCodeReading_TRACEer
#if TRACE_LEVEL // ByteCodeReading_TRACEr
#define BCR_TRACE(n, X) \
if (n < TRACE_LEVEL) std::cerr << std::string(n*2, ' ') << X
#else
@ -35,15 +38,21 @@ struct RawInst { // The raw fields out of the bytecode stream...
};
};
class BytecodeParser : public AbstractTypeUser {
std::string Error; // Error message string goes here...
struct LazyFunctionInfo {
const unsigned char *Buf, *EndBuf;
unsigned FunctionSlot;
};
class BytecodeParser : public AbstractTypeUser, public AbstractModuleProvider {
unsigned char *Buffer;
BytecodeParser(const BytecodeParser &); // DO NOT IMPLEMENT
void operator=(const BytecodeParser &); // DO NOT IMPLEMENT
public:
BytecodeParser() {
BytecodeParser() : Buffer(0) {
// Define this in case we don't see a ModuleGlobalInfo block.
FirstDerivedTyID = Type::FirstDerivedTyID;
}
~BytecodeParser() {
freeState();
}
@ -51,12 +60,21 @@ public:
freeTable(Values);
freeTable(LateResolveValues);
freeTable(ModuleValues);
delete [] Buffer;
Buffer = 0;
}
Module *ParseBytecode(const unsigned char *Buf, const unsigned char *EndBuf,
const std::string &ModuleID);
Module* releaseModule() {
// Since we're losing control of this Module, we must hand it back complete
materializeModule();
freeState();
Module *tempM = TheModule;
TheModule = 0;
return tempM;
}
std::string getError() const { return Error; }
void ParseBytecode(const unsigned char *Buf, unsigned Length,
const std::string &ModuleID);
void dump() const {
std::cerr << "BytecodeParser instance!\n";
@ -80,8 +98,6 @@ private: // All of this data is transient across calls to ParseBytecode
}
};
Module *TheModule; // Current Module being read into...
// Information about the module, extracted from the bytecode revision number.
unsigned char RevisionNum; // The rev # itself
unsigned char FirstDerivedTyID; // First variable index to use for type
@ -120,6 +136,12 @@ private: // All of this data is transient across calls to ParseBytecode
//
std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInits;
// For lazy reading-in of functions, we need to save away several pieces of
// information about each function: its begin and end pointer in the buffer
// and its FunctionSlot.
//
std::map<Function*, LazyFunctionInfo*> LazyFunctionLoadMap;
private:
void freeTable(ValueTable &Tab) {
while (!Tab.empty()) {
@ -128,27 +150,33 @@ private:
}
}
bool ParseModule (const unsigned char * Buf, const unsigned char *End);
bool ParseVersionInfo (const unsigned char *&Buf, const unsigned char *End);
bool ParseModuleGlobalInfo(const unsigned char *&Buf, const unsigned char *E);
bool ParseSymbolTable (const unsigned char *&Buf, const unsigned char *End,
SymbolTable *);
bool ParseFunction (const unsigned char *&Buf, const unsigned char *End);
bool ParseBasicBlock (const unsigned char *&Buf, const unsigned char *End,
BasicBlock *&);
public:
void ParseModule(const unsigned char * Buf, const unsigned char *End);
void materializeFunction(Function *F);
private:
void ParseVersionInfo (const unsigned char *&Buf, const unsigned char *End);
void ParseModuleGlobalInfo(const unsigned char *&Buf, const unsigned char *E);
void ParseSymbolTable(const unsigned char *&Buf, const unsigned char *End,
SymbolTable *);
void ParseFunction(const unsigned char *&Buf, const unsigned char *End);
void ParseGlobalTypes(const unsigned char *&Buf, const unsigned char *EndBuf);
std::auto_ptr<BasicBlock>
ParseBasicBlock(const unsigned char *&Buf, const unsigned char *End);
bool ParseInstruction (const unsigned char *&Buf, const unsigned char *End,
Instruction *&);
bool ParseRawInst (const unsigned char *&Buf, const unsigned char *End,
RawInst &);
bool ParseGlobalTypes(const unsigned char *&Buf, const unsigned char *EndBuf);
bool ParseConstantPool(const unsigned char *&Buf, const unsigned char *EndBuf,
ValueTable &Tab, TypeValuesListTy &TypeTab);
bool parseConstantValue(const unsigned char *&Buf, const unsigned char *End,
void ParseConstantPool(const unsigned char *&Buf, const unsigned char *EndBuf,
ValueTable &Tab, TypeValuesListTy &TypeTab);
void parseConstantValue(const unsigned char *&Buf, const unsigned char *End,
const Type *Ty, Constant *&V);
bool parseTypeConstants(const unsigned char *&Buf,
void parseTypeConstants(const unsigned char *&Buf,
const unsigned char *EndBuf,
TypeValuesListTy &Tab, unsigned NumEntries);
TypeValuesListTy &Tab, unsigned NumEntries);
const Type *parseTypeConstant(const unsigned char *&Buf,
const unsigned char *EndBuf);
@ -158,9 +186,9 @@ private:
int insertValue(Value *V, ValueTable &Table); // -1 = Failure
void setValueTo(ValueTable &D, unsigned Slot, Value *V);
bool postResolveValues(ValueTable &ValTab);
void postResolveValues(ValueTable &ValTab);
bool getTypeSlot(const Type *Ty, unsigned &Slot);
void getTypeSlot(const Type *Ty, unsigned &Slot);
// resolve all references to the placeholder (if any) for the given value
void ResolveReferencesToValue(Value *Val, unsigned Slot);
@ -205,6 +233,11 @@ typedef PlaceholderDef<InstPlaceHolderHelper> ValPHolder;
typedef PlaceholderDef<BBPlaceHolderHelper> BBPHolder;
typedef PlaceholderDef<ConstantPlaceHolderHelper> ConstPHolder;
// Some common errors we find
static const std::string Error_readvbr = "read_vbr(): error reading.";
static const std::string Error_read = "read(): error reading.";
static const std::string Error_inputdata = "input_data(): error reading.";
static const std::string Error_DestSlot = "No destination slot found.";
static inline unsigned getValueIDNumberFromPlaceHolder(Value *Val) {
if (isa<Constant>(Val))
@ -217,16 +250,16 @@ static inline unsigned getValueIDNumberFromPlaceHolder(Value *Val) {
}
}
static inline bool readBlock(const unsigned char *&Buf,
static inline void readBlock(const unsigned char *&Buf,
const unsigned char *EndBuf,
unsigned &Type, unsigned &Size) {
unsigned &Type, unsigned &Size) {
#if DEBUG_OUTPUT
bool Result = read(Buf, EndBuf, Type) || read(Buf, EndBuf, Size);
std::cerr << "StartLoc = " << ((unsigned)Buf & 4095)
<< " Type = " << Type << " Size = " << Size << endl;
return Result;
if (Result) throw Error_read;
#else
return read(Buf, EndBuf, Type) || read(Buf, EndBuf, Size);
if (read(Buf, EndBuf, Type) || read(Buf, EndBuf, Size)) throw Error_read;
#endif
}

@ -0,0 +1,170 @@
#include "ReaderInternals.h"
#include "Support/StringExtras.h"
#include "Config/fcntl.h"
#include "Config/unistd.h"
#include "Config/sys/mman.h"
#define CHECK_ALIGN32(begin,end) \
if (align32(begin,end)) \
throw std::string("Alignment error: ReaderWrappers.cpp:" + \
utostr((unsigned)__LINE__));
namespace {
/// BytecodeFileReader - parses a bytecode file from a file
///
class BytecodeFileReader : public BytecodeParser {
private:
unsigned char *Buffer;
int Length;
BytecodeFileReader(const BytecodeFileReader&); // Do not implement
void operator=(BytecodeFileReader &BFR); // Do not implement
public:
BytecodeFileReader(const std::string &Filename);
~BytecodeFileReader();
};
/// BytecodeStdinReader - parses a bytecode file from stdin
///
class BytecodeStdinReader : public BytecodeParser {
private:
std::vector<unsigned char> FileData;
unsigned char *FileBuf;
BytecodeStdinReader(const BytecodeStdinReader&); // Do not implement
void operator=(BytecodeStdinReader &BFR); // Do not implement
public:
BytecodeStdinReader();
~BytecodeStdinReader();
};
/// FDHandle - Simple handle class to make sure a file descriptor gets closed
/// when the object is destroyed.
///
class FDHandle {
int FD;
public:
FDHandle(int fd) : FD(fd) {}
operator int() const { return FD; }
~FDHandle() {
if (FD != -1) close(FD);
}
};
}
BytecodeFileReader::BytecodeFileReader(const std::string &Filename) {
FDHandle FD = open(Filename.c_str(), O_RDONLY);
if (FD == -1)
throw std::string("Error opening file!");
// Stat the file to get its length...
struct stat StatBuf;
if (fstat(FD, &StatBuf) == -1 || StatBuf.st_size == 0)
throw std::string("Error stat'ing file!");
// mmap in the file all at once...
Length = StatBuf.st_size;
unsigned char *Buffer = (unsigned char*)mmap(0, Length, PROT_READ,
MAP_PRIVATE, FD, 0);
if (Buffer == (unsigned char*)MAP_FAILED)
throw std::string("Error mmapping file!");
// Parse the bytecode we mmapped in
ParseBytecode(Buffer, Length, Filename);
}
BytecodeFileReader::~BytecodeFileReader() {
// Unmmap the bytecode...
munmap((char*)Buffer, Length);
}
#define ALIGN_PTRS 0
BytecodeStdinReader::BytecodeStdinReader() {
int BlockSize;
unsigned char Buffer[4096*4];
// Read in all of the data from stdin, we cannot mmap stdin...
while ((BlockSize = read(0 /*stdin*/, Buffer, 4096*4))) {
if (BlockSize == -1)
throw std::string("Error reading from stdin!");
FileData.insert(FileData.end(), Buffer, Buffer+BlockSize);
}
if (FileData.empty())
throw std::string("Standard Input empty!");
#if ALIGN_PTRS
FileBuf = (unsigned char*)mmap(0, FileData.size(), PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
assert((Buf != (unsigned char*)-1) && "mmap returned error!");
memcpy(Buf, &FileData[0], FileData.size());
#else
FileBuf = &FileData[0];
#endif
#if 0
// Allocate a new buffer to hold the bytecode...
unsigned char *ParseBegin=0;
unsigned Offset=0;
if ((intptr_t)Buffer & 3) {
delete [] Buffer;
Buffer = new unsigned char[Length+4];
Offset = 4-((intptr_t)Buffer & 3); // Make sure it's aligned
}
memcpy(Buffer+Offset, Buf, Length); // Copy it over
ParseBegin = Buffer+Offset;
#endif
ParseBytecode(FileBuf, FileData.size(), "<stdin>");
}
BytecodeStdinReader::~BytecodeStdinReader() {
#if ALIGN_PTRS
munmap((char*)FileBuf, FileData.size()); // Free mmap'd data area
#endif
}
///
///
AbstractModuleProvider*
getBytecodeBufferModuleProvider(const unsigned char *Buffer, unsigned Length,
const std::string &ModuleID) {
CHECK_ALIGN32(Buffer, Buffer+Length);
BytecodeParser *Parser = new BytecodeParser();
Parser->ParseBytecode(Buffer, Length, ModuleID);
return Parser;
}
Module *ParseBytecodeBuffer(const unsigned char *Buffer, unsigned Length,
const std::string &ModuleID, std::string *ErrorStr){
AbstractModuleProvider *AMP =
getBytecodeBufferModuleProvider(Buffer, Length, ModuleID);
Module *M = AMP->releaseModule();
delete AMP;
return M;
}
/// Parse and return a class file...
///
AbstractModuleProvider*
getBytecodeModuleProvider(const std::string &Filename) {
if (Filename != std::string("-")) // Read from a file...
return new BytecodeFileReader(Filename);
else // Read from stdin
return new BytecodeStdinReader();
}
Module *ParseBytecodeFile(const std::string &Filename, std::string *ErrorStr) {
AbstractModuleProvider *AMP = getBytecodeModuleProvider(Filename);
Module *M = AMP->releaseModule();
delete AMP;
return M;
}