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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.

llvm-svn: 196353
This commit is contained in:
Yuchen Wu 2013-12-04 04:49:23 +00:00
parent cd5c36b48b
commit 0b08e75d64
3 changed files with 106 additions and 80 deletions
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73
include/llvm/Support/GCOV.h
View File

@ -28,12 +28,9 @@ class GCOVBlock;
class FileInfo;
namespace GCOV {
enum GCOVFormat {
InvalidGCOV,
GCNO_402,
GCNO_404,
GCDA_402,
GCDA_404
enum GCOVVersion {
V402,
V404
};
} // end GCOV namespace
@ -43,21 +40,43 @@ class GCOVBuffer {
public:
GCOVBuffer(MemoryBuffer *B) : Buffer(B), Cursor(0) {}
/// readGCOVFormat - Read GCOV signature at the beginning of buffer.
GCOV::GCOVFormat readGCOVFormat() {
StringRef Magic = Buffer->getBuffer().slice(0, 8);
Cursor = 8;
if (Magic == "oncg*404")
return GCOV::GCNO_404;
else if (Magic == "oncg*204")
return GCOV::GCNO_402;
else if (Magic == "adcg*404")
return GCOV::GCDA_404;
else if (Magic == "adcg*204")
return GCOV::GCDA_402;
Cursor = 0;
return GCOV::InvalidGCOV;
/// readGCNOFormat - Check GCNO signature is valid at the beginning of buffer.
bool readGCNOFormat() {
StringRef File = Buffer->getBuffer().slice(0, 4);
if (File != "oncg") {
errs() << "Unexpected file type: " << File << ".\n";
return false;
}
Cursor = 4;
return true;
}
/// readGCDAFormat - Check GCDA signature is valid at the beginning of buffer.
bool readGCDAFormat() {
StringRef File = Buffer->getBuffer().slice(0, 4);
if (File != "adcg") {
errs() << "Unexpected file type: " << File << ".\n";
return false;
}
Cursor = 4;
return true;
}
/// readGCOVVersion - Read GCOV version.
bool readGCOVVersion(GCOV::GCOVVersion &Version) {
StringRef VersionStr = Buffer->getBuffer().slice(Cursor, Cursor+4);
if (VersionStr == "*204") {
Cursor += 4;
Version = GCOV::V402;
return true;
}
if (VersionStr == "*404") {
Cursor += 4;
Version = GCOV::V404;
return true;
}
errs() << "Unexpected version: " << VersionStr << ".\n";
return false;
}
/// readFunctionTag - If cursor points to a function tag then increment the
@ -193,12 +212,16 @@ private:
/// (.gcno and .gcda).
class GCOVFile {
public:
GCOVFile() : Checksum(0), Functions(), RunCount(0), ProgramCount(0) {}
GCOVFile() : gcnoInitialized(false), Checksum(0), Functions(), RunCount(0),
ProgramCount(0) {}
~GCOVFile();
bool read(GCOVBuffer &Buffer);
bool readGCNO(GCOVBuffer &Buffer);
bool readGCDA(GCOVBuffer &Buffer);
void dump() const;
void collectLineCounts(FileInfo &FI);
private:
bool gcnoInitialized;
GCOV::GCOVVersion Version;
uint32_t Checksum;
SmallVector<GCOVFunction *, 16> Functions;
uint32_t RunCount;
@ -218,8 +241,8 @@ class GCOVFunction {
public:
GCOVFunction() : Ident(0), LineNumber(0) {}
~GCOVFunction();
bool readGCNO(GCOVBuffer &Buffer, GCOV::GCOVFormat Format);
bool readGCDA(GCOVBuffer &Buffer, GCOV::GCOVFormat Format);
bool readGCNO(GCOVBuffer &Buffer, GCOV::GCOVVersion Version);
bool readGCDA(GCOVBuffer &Buffer, GCOV::GCOVVersion Version);
StringRef getFilename() const { return Filename; }
void dump() const;
void collectLineCounts(FileInfo &FI);

109
lib/IR/GCOV.cpp
View File

@ -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;

4
tools/llvm-cov/llvm-cov.cpp
View File

@ -49,7 +49,7 @@ int main(int argc, char **argv) {
return 1;
}
GCOVBuffer GCNO_GB(GCNO_Buff.get());
if (!GF.read(GCNO_GB)) {
if (!GF.readGCNO(GCNO_GB)) {
errs() << "Invalid .gcno File!\n";
return 1;
}
@ -61,7 +61,7 @@ int main(int argc, char **argv) {
return 1;
}
GCOVBuffer GCDA_GB(GCDA_Buff.get());
if (!GF.read(GCDA_GB)) {
if (!GF.readGCDA(GCDA_GB)) {
errs() << "Invalid .gcda File!\n";
return 1;
}