/// readGCDA - Read a function from the GCDA buffer. Return false if an error
/// occurs.
bool GCOVFunction::readGCDA(GCOVBuffer &Buff, GCOV::GCOVVersion Version) {
uint32_t Dummy;
if (!Buff.readInt(Dummy)) return false; // Function header length
uint32_t GCDAIdent;
if (!Buff.readInt(GCDAIdent)) return false;
if (Ident != GCDAIdent) {
errs() << "Function identifiers do not match: " << Ident << " != "
<< GCDAIdent << " (in " << Name << ").\n";
return false;
}
uint32_t GCDAChecksum;
if (!Buff.readInt(GCDAChecksum)) return false;
if (Checksum != GCDAChecksum) {
errs() << "Function checksums do not match: " << Checksum << " != "
<< GCDAChecksum << " (in " << Name << ").\n";
return false;
}
uint32_t CfgChecksum;
if (Version != GCOV::V402) {
if (!Buff.readInt(CfgChecksum)) return false;
if (Parent.getChecksum() != CfgChecksum) {
errs() << "File checksums do not match: " << Parent.getChecksum()
<< " != " << CfgChecksum << " (in " << Name << ").\n";
return false;
}
}
StringRef GCDAName;
if (!Buff.readString(GCDAName)) return false;
if (Name != GCDAName) {
errs() << "Function names do not match: " << Name << " != " << GCDAName
<< ".\n";
return false;
}
if (!Buff.readArcTag()) {
errs() << "Arc tag not found (in " << Name << ").\n";
return false;
}
uint32_t Count;
if (!Buff.readInt(Count)) return false;
Count /= 2;
// This for loop adds the counts for each block. A second nested loop is
// required to combine the edge counts that are contained in the GCDA file.
for (uint32_t BlockNo = 0; Count > 0; ++BlockNo) {
// The last block is always reserved for exit block
if (BlockNo >= Blocks.size()-1) {
errs() << "Unexpected number of edges (in " << Name << ").\n";
return false;
}
GCOVBlock &Block = *Blocks[BlockNo];
for (size_t EdgeNo = 0, End = Block.getNumDstEdges(); EdgeNo < End;
++EdgeNo) {
if (Count == 0) {
errs() << "Unexpected number of edges (in " << Name << ").\n";
return false;
}
uint64_t ArcCount;
if (!Buff.readInt64(ArcCount)) return false;
Block.addCount(EdgeNo, ArcCount);
--Count;
}
}
return true;
}
/// read - Read a aunction from the buffer. Return false if buffer cursor
/// does not point to a function tag.
bool GCOVFunction::read(GCOVBuffer &Buff, GCOV::GCOVFormat Format) {
if (!Buff.readFunctionTag())
return false;
Buff.readInt(); // Function header length
Ident = Buff.readInt();
Buff.readInt(); // Checksum #1
if (Format != GCOV::GCNO_402)
Buff.readInt(); // Checksum #2
Name = Buff.readString();
if (Format == GCOV::GCNO_402 || Format == GCOV::GCNO_404)
Filename = Buff.readString();
if (Format == GCOV::GCDA_402 || Format == GCOV::GCDA_404) {
Buff.readArcTag();
uint32_t Count = Buff.readInt() / 2;
for (unsigned i = 0, e = Count; i != e; ++i) {
Blocks[i]->addCount(Buff.readInt64());
}
return true;
}
LineNumber = Buff.readInt();
// read blocks.
bool BlockTagFound = Buff.readBlockTag();
(void)BlockTagFound;
assert(BlockTagFound && "Block Tag not found!");
uint32_t BlockCount = Buff.readInt();
for (int i = 0, e = BlockCount; i != e; ++i) {
Buff.readInt(); // Block flags;
Blocks.push_back(new GCOVBlock(i));
}
// read edges.
while (Buff.readEdgeTag()) {
uint32_t EdgeCount = (Buff.readInt() - 1) / 2;
uint32_t BlockNo = Buff.readInt();
assert(BlockNo < BlockCount && "Unexpected Block number!");
for (int i = 0, e = EdgeCount; i != e; ++i) {
Blocks[BlockNo]->addEdge(Buff.readInt());
Buff.readInt(); // Edge flag
}
}
// read line table.
while (Buff.readLineTag()) {
uint32_t LineTableLength = Buff.readInt();
uint32_t Size = Buff.getCursor() + LineTableLength*4;
uint32_t BlockNo = Buff.readInt();
assert(BlockNo < BlockCount && "Unexpected Block number!");
GCOVBlock *Block = Blocks[BlockNo];
Buff.readInt(); // flag
while (Buff.getCursor() != (Size - 4)) {
StringRef Filename = Buff.readString();
if (Buff.getCursor() == (Size - 4)) break;
while (uint32_t L = Buff.readInt())
Block->addLine(Filename, L);
}
Buff.readInt(); // flag
}
return true;
}