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llvm-cov: Split GCOVFile's read into GCNO and GCDA.

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This splits the file-scope read() function into readGCNO() and
readGCDA(). Also broke file format read into functions that first read
the file type, then check the version.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196353 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Yuchen Wu
2013-12-04 04:49:23 +00:00
parent 045d547516
commit 812ad83e58
3 changed files with 106 additions and 80 deletions
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109
lib/IR/GCOV.cpp
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@@ -29,61 +29,64 @@ GCOVFile::~GCOVFile() {
DeleteContainerPointers(Functions);
}
/// isGCDAFile - Return true if Format identifies a .gcda file.
static bool isGCDAFile(GCOV::GCOVFormat Format) {
return Format == GCOV::GCDA_402 || Format == GCOV::GCDA_404;
/// readGCNO - Read GCNO buffer.
bool GCOVFile::readGCNO(GCOVBuffer &Buffer) {
if (!Buffer.readGCNOFormat()) return false;
if (!Buffer.readGCOVVersion(Version)) return false;
if (!Buffer.readInt(Checksum)) return false;
while (true) {
if (!Buffer.readFunctionTag()) break;
GCOVFunction *GFun = new GCOVFunction();
if (!GFun->readGCNO(Buffer, Version))
return false;
Functions.push_back(GFun);
}
gcnoInitialized = true;
return true;
}
/// isGCNOFile - Return true if Format identifies a .gcno file.
static bool isGCNOFile(GCOV::GCOVFormat Format) {
return Format == GCOV::GCNO_402 || Format == GCOV::GCNO_404;
}
/// read - Read GCOV buffer.
bool GCOVFile::read(GCOVBuffer &Buffer) {
GCOV::GCOVFormat Format = Buffer.readGCOVFormat();
if (Format == GCOV::InvalidGCOV)
/// readGCDA - Read GCDA buffer. It is required that readGCDA() can only be
/// called after readGCNO().
bool GCOVFile::readGCDA(GCOVBuffer &Buffer) {
assert(gcnoInitialized && "readGCDA() can only be called after readGCNO()");
if (!Buffer.readGCDAFormat()) return false;
GCOV::GCOVVersion GCDAVersion;
if (!Buffer.readGCOVVersion(GCDAVersion)) return false;
if (Version != GCDAVersion) {
errs() << "GCOV versions do not match.\n";
return false;
}
if (isGCNOFile(Format)) {
if (!Buffer.readInt(Checksum)) return false;
while (true) {
if (!Buffer.readFunctionTag()) break;
GCOVFunction *GFun = new GCOVFunction();
if (!GFun->readGCNO(Buffer, Format))
return false;
Functions.push_back(GFun);
}
} else if (isGCDAFile(Format)) {
uint32_t Checksum2;
if (!Buffer.readInt(Checksum2)) return false;
if (Checksum != Checksum2) {
errs() << "File checksum does not match.\n";
uint32_t GCDAChecksum;
if (!Buffer.readInt(GCDAChecksum)) return false;
if (Checksum != GCDAChecksum) {
errs() << "File checksum does not match.\n";
return false;
}
for (size_t i = 0, e = Functions.size(); i < e; ++i) {
if (!Buffer.readFunctionTag()) {
errs() << "Unexpected number of functions.\n";
return false;
}
for (size_t i = 0, e = Functions.size(); i < e; ++i) {
if (!Buffer.readFunctionTag()) {
errs() << "Unexpected number of functions.\n";
return false;
}
if (!Functions[i]->readGCDA(Buffer, Format))
return false;
}
if (Buffer.readObjectTag()) {
uint32_t Length;
uint32_t Dummy;
if (!Buffer.readInt(Length)) return false;
if (!Buffer.readInt(Dummy)) return false; // checksum
if (!Buffer.readInt(Dummy)) return false; // num
if (!Buffer.readInt(RunCount)) return false;;
Buffer.advanceCursor(Length-3);
}
while (Buffer.readProgramTag()) {
uint32_t Length;
if (!Buffer.readInt(Length)) return false;
Buffer.advanceCursor(Length);
++ProgramCount;
}
if (!Functions[i]->readGCDA(Buffer, Version))
return false;
}
if (Buffer.readObjectTag()) {
uint32_t Length;
uint32_t Dummy;
if (!Buffer.readInt(Length)) return false;
if (!Buffer.readInt(Dummy)) return false; // checksum
if (!Buffer.readInt(Dummy)) return false; // num
if (!Buffer.readInt(RunCount)) return false;;
Buffer.advanceCursor(Length-3);
}
while (Buffer.readProgramTag()) {
uint32_t Length;
if (!Buffer.readInt(Length)) return false;
Buffer.advanceCursor(Length);
++ProgramCount;
}
return true;
@@ -117,12 +120,12 @@ GCOVFunction::~GCOVFunction() {
/// readGCNO - Read a function from the GCNO buffer. Return false if an error
/// occurs.
bool GCOVFunction::readGCNO(GCOVBuffer &Buff, GCOV::GCOVFormat Format) {
bool GCOVFunction::readGCNO(GCOVBuffer &Buff, GCOV::GCOVVersion Version) {
uint32_t Dummy;
if (!Buff.readInt(Dummy)) return false; // Function header length
if (!Buff.readInt(Ident)) return false;
if (!Buff.readInt(Dummy)) return false; // Checksum #1
if (Format != GCOV::GCNO_402)
if (Version != GCOV::V402)
if (!Buff.readInt(Dummy)) return false; // Checksum #2
if (!Buff.readString(Name)) return false;
@@ -198,12 +201,12 @@ bool GCOVFunction::readGCNO(GCOVBuffer &Buff, GCOV::GCOVFormat Format) {
/// readGCDA - Read a function from the GCDA buffer. Return false if an error
/// occurs.
bool GCOVFunction::readGCDA(GCOVBuffer &Buff, GCOV::GCOVFormat Format) {
bool GCOVFunction::readGCDA(GCOVBuffer &Buff, GCOV::GCOVVersion Version) {
uint32_t Dummy;
if (!Buff.readInt(Dummy)) return false; // Function header length
if (!Buff.readInt(Ident)) return false;
if (!Buff.readInt(Dummy)) return false; // Checksum #1
if (Format != GCOV::GCDA_402)
if (Version != GCOV::V402)
if (!Buff.readInt(Dummy)) return false; // Checksum #2
if (!Buff.readString(Name)) return false;