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Implemented prototype serialization of pointers, including support

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for backpatching.

Added Deserialize::ReadVal.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43319 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Ted Kremenek
2007-10-25 00:10:21 +00:00
parent 8eadd5a6db
commit fe2a012338
5 changed files with 139 additions and 33 deletions
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54
lib/Bitcode/Reader/Deserialize.cpp
View File

@ -22,6 +22,21 @@ Deserializer::Deserializer(BitstreamReader& stream)
Deserializer::~Deserializer() {
assert (RecIdx >= Record.size() &&
"Still scanning bitcode record when deserialization completed.");
BackpatchPointers();
}
bool Deserializer::inRecord() {
if (Record.size() > 0) {
if (RecIdx >= Record.size()) {
RecIdx = 0;
Record.clear();
return false;
}
else return true;
}
else return false;
}
void Deserializer::ReadRecord() {
@ -79,14 +94,49 @@ void Deserializer::ReadCStr(std::vector<char>& buff, bool isNullTerm) {
buff.push_back('\0');
}
void Deserializer::RegisterPtr(unsigned PtrId,void* Ptr) {
BPatchEntry& E = BPatchMap[PtrId];
assert (E.Ptr == NULL && "Pointer already registered.");
E.Ptr = Ptr;
}
void Deserializer::ReadPtr(void*& PtrRef) {
unsigned PtrId = ReadInt();
BPatchEntry& E = BPatchMap[PtrId];
if (E.Ptr == NULL) {
// Register backpatch.
void* P = Allocator.Allocate<BPatchNode>();
E.Head = new (P) BPatchNode(E.Head,PtrRef);
}
else
PtrRef = E.Ptr;
}
void Deserializer::BackpatchPointers() {
for (MapTy::iterator I=BPatchMap.begin(),E=BPatchMap.end(); I!=E; ++I) {
BPatchEntry& E = I->second;
assert (E.Ptr && "No pointer found for backpatch.");
for (BPatchNode* N = E.Head; N != NULL; N = N->Next)
N->PtrRef = E.Ptr;
E.Head = NULL;
}
Allocator.Reset();
}
#define INT_READ(TYPE)\
void SerializeTrait<TYPE>::Read(Deserializer& D, TYPE& X) {\
X = (TYPE) D.ReadInt(); }
X = (TYPE) D.ReadInt(); }\
TYPE SerializeTrait<TYPE>::ReadVal(Deserializer& D) {\
return (TYPE) D.ReadInt(); }
INT_READ(bool)
INT_READ(unsigned char)
INT_READ(unsigned short)
INT_READ(unsigned int)
INT_READ(unsigned long)
INT_READ(unsigned long long)

12
lib/Bitcode/Writer/Serialize.cpp
View File

@ -57,6 +57,17 @@ void Serializer::EmitCStr(const char* s) {
EmitCStr(s,s+strlen(s));
}
unsigned Serializer::getPtrId(void* ptr) {
MapTy::iterator I = PtrMap.find(ptr);
if (I == PtrMap.end()) {
unsigned id = PtrMap.size();
PtrMap[ptr] = id;
return id;
}
else return I->second;
}
#define INT_EMIT(TYPE)\
void SerializeTrait<TYPE>::Emit(Serializer&S, TYPE X) { S.EmitInt(X); }
@ -65,4 +76,3 @@ INT_EMIT(unsigned char)
INT_EMIT(unsigned short)
INT_EMIT(unsigned int)
INT_EMIT(unsigned long)
INT_EMIT(unsigned long long)