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183 lines
6.6 KiB
C++
183 lines
6.6 KiB
C++
//===- llvm/unittest/XRay/FDRTraceWriterTest.cpp ----------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Test a utility that can write out XRay FDR Mode formatted trace files.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/XRay/FDRTraceWriter.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/XRay/FDRLogBuilder.h"
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#include "llvm/XRay/FDRRecords.h"
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#include "llvm/XRay/Trace.h"
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#include "gmock/gmock.h"
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#include "gtest/gtest.h"
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#include <string>
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namespace llvm {
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namespace xray {
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namespace {
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using testing::ElementsAre;
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using testing::Eq;
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using testing::Field;
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using testing::IsEmpty;
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using testing::Not;
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// We want to be able to create an instance of an FDRTraceWriter and associate
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// it with a stream, which could be loaded and turned into a Trace instance.
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// This test writes out version 3 trace logs.
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TEST(FDRTraceWriterTest, WriteToStringBufferVersion3) {
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std::string Data;
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raw_string_ostream OS(Data);
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XRayFileHeader H;
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H.Version = 3;
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H.Type = 1;
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H.ConstantTSC = true;
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H.NonstopTSC = true;
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H.CycleFrequency = 3e9;
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FDRTraceWriter Writer(OS, H);
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auto L = LogBuilder()
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.add<BufferExtents>(80)
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.add<NewBufferRecord>(1)
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.add<WallclockRecord>(1, 1)
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.add<PIDRecord>(1)
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.add<NewCPUIDRecord>(1, 2)
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.add<FunctionRecord>(RecordTypes::ENTER, 1, 1)
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.add<FunctionRecord>(RecordTypes::EXIT, 1, 100)
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.consume();
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for (auto &P : L)
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ASSERT_FALSE(errorToBool(P->apply(Writer)));
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OS.flush();
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// Then from here we load the Trace file.
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DataExtractor DE(Data, sys::IsLittleEndianHost, 8);
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auto TraceOrErr = loadTrace(DE, true);
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if (!TraceOrErr)
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FAIL() << TraceOrErr.takeError();
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auto &Trace = TraceOrErr.get();
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ASSERT_THAT(Trace, Not(IsEmpty()));
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EXPECT_THAT(Trace, ElementsAre(Field(&XRayRecord::FuncId, Eq(1)),
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Field(&XRayRecord::FuncId, Eq(1))));
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EXPECT_THAT(Trace, ElementsAre(Field(&XRayRecord::TId, Eq(1u)),
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Field(&XRayRecord::TId, Eq(1u))));
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EXPECT_THAT(Trace, ElementsAre(Field(&XRayRecord::PId, Eq(1u)),
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Field(&XRayRecord::PId, Eq(1u))));
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EXPECT_THAT(Trace, ElementsAre(Field(&XRayRecord::CPU, Eq(1u)),
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Field(&XRayRecord::CPU, Eq(1u))));
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EXPECT_THAT(Trace,
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ElementsAre(Field(&XRayRecord::Type, Eq(RecordTypes::ENTER)),
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Field(&XRayRecord::Type, Eq(RecordTypes::EXIT))));
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}
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// This version is almost exactly the same as above, except writing version 2
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// logs, without the PID records.
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TEST(FDRTraceWriterTest, WriteToStringBufferVersion2) {
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std::string Data;
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raw_string_ostream OS(Data);
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XRayFileHeader H;
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H.Version = 2;
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H.Type = 1;
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H.ConstantTSC = true;
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H.NonstopTSC = true;
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H.CycleFrequency = 3e9;
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FDRTraceWriter Writer(OS, H);
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auto L = LogBuilder()
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.add<BufferExtents>(64)
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.add<NewBufferRecord>(1)
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.add<WallclockRecord>(1, 1)
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.add<NewCPUIDRecord>(1, 2)
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.add<FunctionRecord>(RecordTypes::ENTER, 1, 1)
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.add<FunctionRecord>(RecordTypes::EXIT, 1, 100)
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.consume();
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for (auto &P : L)
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ASSERT_FALSE(errorToBool(P->apply(Writer)));
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OS.flush();
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// Then from here we load the Trace file.
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DataExtractor DE(Data, sys::IsLittleEndianHost, 8);
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auto TraceOrErr = loadTrace(DE, true);
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if (!TraceOrErr)
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FAIL() << TraceOrErr.takeError();
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auto &Trace = TraceOrErr.get();
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ASSERT_THAT(Trace, Not(IsEmpty()));
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EXPECT_THAT(Trace, ElementsAre(Field(&XRayRecord::FuncId, Eq(1)),
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Field(&XRayRecord::FuncId, Eq(1))));
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EXPECT_THAT(Trace, ElementsAre(Field(&XRayRecord::TId, Eq(1u)),
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Field(&XRayRecord::TId, Eq(1u))));
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EXPECT_THAT(Trace, ElementsAre(Field(&XRayRecord::CPU, Eq(1u)),
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Field(&XRayRecord::CPU, Eq(1u))));
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EXPECT_THAT(Trace,
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ElementsAre(Field(&XRayRecord::Type, Eq(RecordTypes::ENTER)),
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Field(&XRayRecord::Type, Eq(RecordTypes::EXIT))));
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}
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// This covers version 1 of the log, without a BufferExtents record but has an
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// explicit EndOfBuffer record.
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TEST(FDRTraceWriterTest, WriteToStringBufferVersion1) {
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std::string Data;
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raw_string_ostream OS(Data);
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XRayFileHeader H;
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H.Version = 1;
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H.Type = 1;
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H.ConstantTSC = true;
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H.NonstopTSC = true;
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H.CycleFrequency = 3e9;
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// Write the size of buffers out, arbitrarily it's 4k.
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constexpr uint64_t BufferSize = 4096;
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std::memcpy(H.FreeFormData, reinterpret_cast<const char *>(&BufferSize),
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sizeof(BufferSize));
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FDRTraceWriter Writer(OS, H);
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OS.flush();
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// Ensure that at this point the Data buffer has the file header serialized
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// size.
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ASSERT_THAT(Data.size(), Eq(32u));
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auto L = LogBuilder()
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.add<NewBufferRecord>(1)
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.add<WallclockRecord>(1, 1)
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.add<NewCPUIDRecord>(1, 2)
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.add<FunctionRecord>(RecordTypes::ENTER, 1, 1)
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.add<FunctionRecord>(RecordTypes::EXIT, 1, 100)
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.add<EndBufferRecord>()
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.consume();
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for (auto &P : L)
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ASSERT_FALSE(errorToBool(P->apply(Writer)));
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// We need to pad the buffer with 4016 (4096 - 80) bytes of zeros.
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OS.write_zeros(4016);
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OS.flush();
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// For version 1 of the log, we need the whole buffer to be the size of the
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// file header plus 32.
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ASSERT_THAT(Data.size(), Eq(BufferSize + 32));
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// Then from here we load the Trace file.
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DataExtractor DE(Data, sys::IsLittleEndianHost, 8);
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auto TraceOrErr = loadTrace(DE, true);
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if (!TraceOrErr)
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FAIL() << TraceOrErr.takeError();
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auto &Trace = TraceOrErr.get();
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ASSERT_THAT(Trace, Not(IsEmpty()));
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EXPECT_THAT(Trace, ElementsAre(Field(&XRayRecord::FuncId, Eq(1)),
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Field(&XRayRecord::FuncId, Eq(1))));
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EXPECT_THAT(Trace, ElementsAre(Field(&XRayRecord::TId, Eq(1u)),
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Field(&XRayRecord::TId, Eq(1u))));
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EXPECT_THAT(Trace, ElementsAre(Field(&XRayRecord::CPU, Eq(1u)),
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Field(&XRayRecord::CPU, Eq(1u))));
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EXPECT_THAT(Trace,
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ElementsAre(Field(&XRayRecord::Type, Eq(RecordTypes::ENTER)),
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Field(&XRayRecord::Type, Eq(RecordTypes::EXIT))));
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}
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} // namespace
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} // namespace xray
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} // namespace llvm
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