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
SampleProfileReaderBinary::readProfile(FunctionSamples &FProfile) {
auto NumSamples = readNumber<uint64_t>();
if (std::error_code EC = NumSamples.getError())
return EC;
FProfile.addTotalSamples(*NumSamples);
// Read the samples in the body.
auto NumRecords = readNumber<uint32_t>();
if (std::error_code EC = NumRecords.getError())
return EC;
for (uint32_t I = 0; I < *NumRecords; ++I) {
auto LineOffset = readNumber<uint64_t>();
if (std::error_code EC = LineOffset.getError())
return EC;
if (!isOffsetLegal(*LineOffset)) {
return std::error_code();
}
auto Discriminator = readNumber<uint64_t>();
if (std::error_code EC = Discriminator.getError())
return EC;
auto NumSamples = readNumber<uint64_t>();
if (std::error_code EC = NumSamples.getError())
return EC;
auto NumCalls = readNumber<uint32_t>();
if (std::error_code EC = NumCalls.getError())
return EC;
for (uint32_t J = 0; J < *NumCalls; ++J) {
auto CalledFunction(readStringFromTable());
if (std::error_code EC = CalledFunction.getError())
return EC;
auto CalledFunctionSamples = readNumber<uint64_t>();
if (std::error_code EC = CalledFunctionSamples.getError())
return EC;
FProfile.addCalledTargetSamples(*LineOffset, *Discriminator,
*CalledFunction, *CalledFunctionSamples);
}
FProfile.addBodySamples(*LineOffset, *Discriminator, *NumSamples);
}
// Read all the samples for inlined function calls.
auto NumCallsites = readNumber<uint32_t>();
if (std::error_code EC = NumCallsites.getError())
return EC;
for (uint32_t J = 0; J < *NumCallsites; ++J) {
auto LineOffset = readNumber<uint64_t>();
if (std::error_code EC = LineOffset.getError())
return EC;
auto Discriminator = readNumber<uint64_t>();
if (std::error_code EC = Discriminator.getError())
return EC;
auto FName(readStringFromTable());
if (std::error_code EC = FName.getError())
return EC;
FunctionSamples &CalleeProfile = FProfile.functionSamplesAt(
LineLocation(*LineOffset, *Discriminator))[*FName];
CalleeProfile.setName(*FName);
if (std::error_code EC = readProfile(CalleeProfile))
return EC;
}
return sampleprof_error::success;
}