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//===- llvm/unittest/Support/DebugLogTest.cpp -----------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// This macro is defined in the LLVM build system, but we undefine it here
// so that we test at least once in-tree the case where __SHORT_FILE__ is not
// defined.
#undef __SHORT_FILE__
#include "llvm/Support/DebugLog.h"
#include "llvm/ADT/Sequence.h"
#include "llvm/Support/raw_ostream.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include <string>
using namespace llvm;
using testing::Eq;
using testing::HasSubstr;
#ifndef NDEBUG
TEST(DebugLogTest, Basic) {
llvm::DebugFlag = true;
static const char *DT[] = {"A", "B"};
// Clear debug types.
setCurrentDebugTypes(DT, 0);
{
std::string str;
raw_string_ostream os(str);
DEBUGLOG_WITH_STREAM_AND_TYPE(os, 0, nullptr) << "NoType";
EXPECT_FALSE(StringRef(os.str()).starts_with('['));
EXPECT_TRUE(StringRef(os.str()).ends_with("NoType\n"));
}
setCurrentDebugTypes(DT, 2);
{
std::string str;
raw_string_ostream os(str);
DEBUGLOG_WITH_STREAM_AND_TYPE(os, 0, "A") << "A";
DEBUGLOG_WITH_STREAM_AND_TYPE(os, 0, "B") << "B";
EXPECT_TRUE(StringRef(os.str()).starts_with('['));
EXPECT_THAT(os.str(), AllOf(HasSubstr("A\n"), HasSubstr("B\n")));
}
setCurrentDebugType("A");
{
std::string str;
raw_string_ostream os(str);
// Just check that the macro doesn't result in dangling else.
if (true)
DEBUGLOG_WITH_STREAM_AND_TYPE(os, 0, "A") << "A";
else
DEBUGLOG_WITH_STREAM_AND_TYPE(os, 0, "A") << "B";
DEBUGLOG_WITH_STREAM_AND_TYPE(os, 0, "B") << "B";
EXPECT_THAT(os.str(), AllOf(HasSubstr("A\n"), Not(HasSubstr("B\n"))));
int count = 0;
auto inc = [&]() { return ++count; };
EXPECT_THAT(count, Eq(0));
DEBUGLOG_WITH_STREAM_AND_TYPE(os, 0, "A") << inc();
EXPECT_THAT(count, Eq(1));
DEBUGLOG_WITH_STREAM_AND_TYPE(os, 0, "B") << inc();
EXPECT_THAT(count, Eq(1));
}
}
TEST(DebugLogTest, BasicWithLevel) {
llvm::DebugFlag = true;
// We expect A to be always printed, B to be printed only when level is 1 or
// below, and C to be printed only when level is 0 or below.
static const char *DT[] = {"A", "B:1", "C:"};
setCurrentDebugTypes(DT, sizeof(DT) / sizeof(DT[0]));
std::string str;
raw_string_ostream os(str);
for (auto type : {"A", "B", "C", "D"})
for (int level : llvm::seq<int>(0, 4))
DEBUGLOG_WITH_STREAM_TYPE_FILE_AND_LINE(os, level, type, type, level)
<< level;
EXPECT_EQ(os.str(), "[A:0] A:0 0\n[A:1] A:1 1\n[A:2] A:2 2\n[A:3] A:3 "
"3\n[B:0] B:0 0\n[B:1] B:1 1\n[C:0] C:0 0\n");
}
TEST(DebugLogTest, NegativeLevel) {
llvm::DebugFlag = true;
// Test the special behavior when all the levels are 0.
// In this case we expect all the debug types to be printed.
static const char *DT[] = {"A:"};
setCurrentDebugTypes(DT, sizeof(DT) / sizeof(DT[0]));
std::string str;
raw_string_ostream os(str);
for (auto type : {"A", "B"})
for (int level : llvm::seq<int>(0, 2))
DEBUGLOG_WITH_STREAM_TYPE_FILE_AND_LINE(os, level, type, type, level)
<< level;
EXPECT_EQ(os.str(), "[A:0] A:0 0\n[B:0] B:0 0\n[B:1] B:1 1\n");
}
TEST(DebugLogTest, StreamPrefix) {
llvm::DebugFlag = true;
static const char *DT[] = {"A", "B"};
setCurrentDebugTypes(DT, 2);
std::string str;
raw_string_ostream os(str);
std::string expected = "PrefixA 1\nPrefixA 2\nPrefixA \nPrefixB "
"3\nPrefixB 4\nPrefixA 5";
{
llvm::impl::raw_ldbg_ostream ldbg_osB("PrefixB ", os);
llvm::impl::raw_ldbg_ostream ldbg_osA("PrefixA ", os);
ldbg_osA << "1\n2";
ldbg_osA << "\n\n";
ldbg_osB << "3\n4\n";
ldbg_osA << "5";
EXPECT_EQ(os.str(), expected);
}
// After destructors, there was a pending newline for stream B.
EXPECT_EQ(os.str(), expected + "\nPrefixB \n");
}
#else
TEST(DebugLogTest, Basic) {
// LDBG should be compiled out in NDEBUG, so just check it compiles and has
// no effect.
llvm::DebugFlag = true;
static const char *DT[] = {"A"};
setCurrentDebugTypes(DT, 0);
int count = 0;
auto inc = [&]() { return ++count; };
EXPECT_THAT(count, Eq(0));
LDBG() << inc();
EXPECT_THAT(count, Eq(0));
}
#endif
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