TEST_F(SampleProfTest, sample_overflow_saturation) {
const uint64_t Max = std::numeric_limits<uint64_t>::max();
sampleprof_error Result;
StringRef FooName("_Z3fooi");
FunctionSamples FooSamples;
Result = FooSamples.addTotalSamples(1);
ASSERT_EQ(Result, sampleprof_error::success);
Result = FooSamples.addHeadSamples(1);
ASSERT_EQ(Result, sampleprof_error::success);
Result = FooSamples.addBodySamples(10, 0, 1);
ASSERT_EQ(Result, sampleprof_error::success);
Result = FooSamples.addTotalSamples(Max);
ASSERT_EQ(Result, sampleprof_error::counter_overflow);
ASSERT_EQ(FooSamples.getTotalSamples(), Max);
Result = FooSamples.addHeadSamples(Max);
ASSERT_EQ(Result, sampleprof_error::counter_overflow);
ASSERT_EQ(FooSamples.getHeadSamples(), Max);
Result = FooSamples.addBodySamples(10, 0, Max);
ASSERT_EQ(Result, sampleprof_error::counter_overflow);
ErrorOr<uint64_t> BodySamples = FooSamples.findSamplesAt(10, 0);
ASSERT_FALSE(BodySamples.getError());
ASSERT_EQ(BodySamples.get(), Max);
}
std::error_code
SampleProfileWriterCompactBinary::write(const FunctionSamples &S) {
uint64_t Offset = OutputStream->tell();
StringRef Name = S.getName();
FuncOffsetTable[Name] = Offset;
encodeULEB128(S.getHeadSamples(), *OutputStream);
return writeBody(S);
}
/// Write samples to a text file.
///
/// Note: it may be tempting to implement this in terms of
/// FunctionSamples::print(). Please don't. The dump functionality is intended
/// for debugging and has no specified form.
///
/// The format used here is more structured and deliberate because
/// it needs to be parsed by the SampleProfileReaderText class.
std::error_code SampleProfileWriterText::write(const FunctionSamples &S) {
auto &OS = *OutputStream;
OS << S.getName() << ":" << S.getTotalSamples();
if (Indent == 0)
OS << ":" << S.getHeadSamples();
OS << "\n";
SampleSorter<LineLocation, SampleRecord> SortedSamples(S.getBodySamples());
for (const auto &I : SortedSamples.get()) {
LineLocation Loc = I->first;
const SampleRecord &Sample = I->second;
OS.indent(Indent + 1);
if (Loc.Discriminator == 0)
OS << Loc.LineOffset << ": ";
else
OS << Loc.LineOffset << "." << Loc.Discriminator << ": ";
OS << Sample.getSamples();
for (const auto &J : Sample.getCallTargets())
OS << " " << J.first() << ":" << J.second;
OS << "\n";
}
SampleSorter<LineLocation, FunctionSamplesMap> SortedCallsiteSamples(
S.getCallsiteSamples());
Indent += 1;
for (const auto &I : SortedCallsiteSamples.get())
for (const auto &FS : I->second) {
LineLocation Loc = I->first;
const FunctionSamples &CalleeSamples = FS.second;
OS.indent(Indent);
if (Loc.Discriminator == 0)
OS << Loc.LineOffset << ": ";
else
OS << Loc.LineOffset << "." << Loc.Discriminator << ": ";
if (std::error_code EC = write(CalleeSamples))
return EC;
}
Indent -= 1;
return sampleprof_error::success;
}
/// \brief Write samples to a binary file.
///
/// \returns true if the samples were written successfully, false otherwise.
bool SampleProfileWriterBinary::write(StringRef FName,
const FunctionSamples &S) {
OS << FName;
encodeULEB128(0, OS);
encodeULEB128(S.getTotalSamples(), OS);
encodeULEB128(S.getHeadSamples(), OS);
encodeULEB128(S.getBodySamples().size(), OS);
// Emit all the body samples.
for (const auto &I : S.getBodySamples()) {
LineLocation Loc = I.first;
const SampleRecord &Sample = I.second;
encodeULEB128(Loc.LineOffset, OS);
encodeULEB128(Loc.Discriminator, OS);
encodeULEB128(Sample.getSamples(), OS);
encodeULEB128(Sample.getCallTargets().size(), OS);
for (const auto &J : Sample.getCallTargets()) {
std::string Callee = J.first();
unsigned CalleeSamples = J.second;
OS << Callee;
encodeULEB128(0, OS);
encodeULEB128(CalleeSamples, OS);
}
}
// Recursively emit all the callsite samples.
encodeULEB128(S.getCallsiteSamples().size(), OS);
for (const auto &J : S.getCallsiteSamples()) {
CallsiteLocation Loc = J.first;
const FunctionSamples &CalleeSamples = J.second;
encodeULEB128(Loc.LineOffset, OS);
encodeULEB128(Loc.Discriminator, OS);
write(Loc.CalleeName, CalleeSamples);
}
return true;
}
/// \brief Write samples to a text file.
bool SampleProfileWriterText::write(StringRef FName, const FunctionSamples &S) {
OS << FName << ":" << S.getTotalSamples();
if (Indent == 0)
OS << ":" << S.getHeadSamples();
OS << "\n";
for (const auto &I : S.getBodySamples()) {
LineLocation Loc = I.first;
const SampleRecord &Sample = I.second;
OS.indent(Indent + 1);
if (Loc.Discriminator == 0)
OS << Loc.LineOffset << ": ";
else
OS << Loc.LineOffset << "." << Loc.Discriminator << ": ";
OS << Sample.getSamples();
for (const auto &J : Sample.getCallTargets())
OS << " " << J.first() << ":" << J.second;
OS << "\n";
}
Indent += 1;
for (const auto &I : S.getCallsiteSamples()) {
CallsiteLocation Loc = I.first;
const FunctionSamples &CalleeSamples = I.second;
OS.indent(Indent);
if (Loc.Discriminator == 0)
OS << Loc.LineOffset << ": ";
else
OS << Loc.LineOffset << "." << Loc.Discriminator << ": ";
write(Loc.CalleeName, CalleeSamples);
}
Indent -= 1;
return true;
}
/// Write samples of a top-level function to a binary file.
///
/// \returns true if the samples were written successfully, false otherwise.
std::error_code SampleProfileWriterBinary::write(const FunctionSamples &S) {
encodeULEB128(S.getHeadSamples(), *OutputStream);
return writeBody(S);
}