unittests/tools/llvm-exegesis/PerfHelperTest.cpp

   1 //===-- PerfHelperTest.cpp --------------------------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "PerfHelper.h"
  10 #include "llvm/Config/config.h"
  11 #include "gmock/gmock.h"
  12 #include "gtest/gtest.h"
  13
  14 namespace llvm {
  15 namespace exegesis {
  16 namespace pfm {
  17 namespace {
  18
  19 using ::testing::IsEmpty;
  20 using ::testing::Not;
  21
  22 TEST(PerfHelperTest, FunctionalTest) {
  23 #ifdef HAVE_LIBPFM
  24   ASSERT_FALSE(pfmInitialize());
  25   const PerfEvent SingleEvent("CYCLES:u");
  26   const auto &EmptyFn = []() {};
  27   std::string CallbackEventName;
  28   std::string CallbackEventNameFullyQualifed;
  29   int64_t CallbackEventCycles;
  30   Measure(
  31       makeArrayRef(SingleEvent),
  32       [&](const PerfEvent &Event, int64_t Value) {
  33         CallbackEventName = Event.name();
  34         CallbackEventNameFullyQualifed = Event.getPfmEventString();
  35         CallbackEventCycles = Value;
  36       },
  37       EmptyFn);
  38   EXPECT_EQ(CallbackEventName, "CYCLES:u");
  39   EXPECT_THAT(CallbackEventNameFullyQualifed, Not(IsEmpty()));
  40   pfmTerminate();
  41 #else
  42   ASSERT_TRUE(pfmInitialize());
  43 #endif
  44 }
  45
  46 } // namespace
  47 } // namespace pfm
  48 } // namespace exegesis
  49 } // namespace llvm