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//===-- HostTest.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
//
//===----------------------------------------------------------------------===//
#include "lldb/Host/Host.h"
#include "TestingSupport/SubsystemRAII.h"
#include "lldb/Host/FileSystem.h"
#include "lldb/Host/HostInfo.h"
#include "lldb/Host/Pipe.h"
#include "lldb/Host/ProcessLaunchInfo.h"
#include "lldb/Utility/ProcessInfo.h"
#include "llvm/ADT/ScopeExit.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Testing/Support/Error.h"
#include "gtest/gtest.h"
#include <future>
#include <thread>
using namespace lldb_private;
using namespace llvm;
// From TestMain.cpp.
extern const char *TestMainArgv0;
static cl::opt<uint64_t> test_arg("test-arg");
TEST(Host, WaitStatusFormat) {
EXPECT_EQ("W01", formatv("{0:g}", WaitStatus{WaitStatus::Exit, 1}).str());
EXPECT_EQ("X02", formatv("{0:g}", WaitStatus{WaitStatus::Signal, 2}).str());
EXPECT_EQ("S03", formatv("{0:g}", WaitStatus{WaitStatus::Stop, 3}).str());
EXPECT_EQ("Exited with status 4",
formatv("{0}", WaitStatus{WaitStatus::Exit, 4}).str());
}
TEST(Host, GetEnvironment) {
putenv(const_cast<char *>("LLDB_TEST_ENVIRONMENT_VAR=Host::GetEnvironment"));
ASSERT_EQ("Host::GetEnvironment",
Host::GetEnvironment().lookup("LLDB_TEST_ENVIRONMENT_VAR"));
}
TEST(Host, ProcessInstanceInfoCumulativeUserTimeIsValid) {
ProcessInstanceInfo info;
info.SetCumulativeUserTime(ProcessInstanceInfo::timespec{0, 0});
EXPECT_FALSE(info.CumulativeUserTimeIsValid());
info.SetCumulativeUserTime(ProcessInstanceInfo::timespec{0, 1});
EXPECT_TRUE(info.CumulativeUserTimeIsValid());
info.SetCumulativeUserTime(ProcessInstanceInfo::timespec{1, 0});
EXPECT_TRUE(info.CumulativeUserTimeIsValid());
}
TEST(Host, ProcessInstanceInfoCumulativeSystemTimeIsValid) {
ProcessInstanceInfo info;
info.SetCumulativeSystemTime(ProcessInstanceInfo::timespec{0, 0});
EXPECT_FALSE(info.CumulativeSystemTimeIsValid());
info.SetCumulativeSystemTime(ProcessInstanceInfo::timespec{0, 1});
EXPECT_TRUE(info.CumulativeSystemTimeIsValid());
info.SetCumulativeSystemTime(ProcessInstanceInfo::timespec{1, 0});
EXPECT_TRUE(info.CumulativeSystemTimeIsValid());
}
TEST(Host, LaunchProcessSetsArgv0) {
SubsystemRAII<FileSystem> subsystems;
static constexpr StringLiteral TestArgv0 = "HelloArgv0";
if (test_arg != 0) {
// In subprocess
if (TestMainArgv0 != TestArgv0) {
errs() << formatv("Got '{0}' for argv[0]\n", TestMainArgv0);
exit(1);
}
exit(0);
}
ProcessLaunchInfo info;
info.SetExecutableFile(
FileSpec(llvm::sys::fs::getMainExecutable(TestMainArgv0, &test_arg)),
/*add_exe_file_as_first_arg=*/false);
info.GetArguments().AppendArgument("HelloArgv0");
info.GetArguments().AppendArgument(
"--gtest_filter=Host.LaunchProcessSetsArgv0");
info.GetArguments().AppendArgument("--test-arg=47");
std::promise<int> exit_status;
info.SetMonitorProcessCallback([&](lldb::pid_t pid, int signal, int status) {
exit_status.set_value(status);
});
ASSERT_THAT_ERROR(Host::LaunchProcess(info).takeError(), Succeeded());
ASSERT_THAT(exit_status.get_future().get(), 0);
}
TEST(Host, FindProcesses) {
SubsystemRAII<FileSystem, HostInfo> subsystems;
if (test_arg != 0) {
// Give the parent time to retrieve information about self.
// It will kill self when it is done.
std::this_thread::sleep_for(std::chrono::seconds(10));
exit(0);
}
bool foundPID = false;
ProcessLaunchInfo info;
ProcessInstanceInfoList processes;
ProcessInstanceInfoMatch match(TestMainArgv0, NameMatch::Equals);
info.SetExecutableFile(FileSpec(TestMainArgv0),
/*add_exe_file_as_first_arg=*/true);
info.GetArguments().AppendArgument("--gtest_filter=Host.FindProcesses");
info.GetArguments().AppendArgument("--test-arg=48");
std::promise<int> exit_status;
info.SetMonitorProcessCallback([&](lldb::pid_t pid, int signal, int status) {
exit_status.set_value(status);
});
ASSERT_THAT_ERROR(Host::LaunchProcess(info).takeError(), Succeeded());
ASSERT_TRUE(Host::FindProcesses(match, processes));
for (const auto &process : processes) {
if (process.GetProcessID() == info.GetProcessID()) {
ASSERT_EQ(process.GetExecutableFile().GetFilename(),
info.GetExecutableFile().GetFilename());
foundPID = true;
}
}
ASSERT_TRUE(foundPID);
auto clean_up = llvm::make_scope_exit([&] {
Host::Kill(info.GetProcessID(), SIGKILL);
exit_status.get_future().get();
});
}
TEST(Host, LaunchProcessDuplicatesHandle) {
static constexpr llvm::StringLiteral test_msg("Hello subprocess!");
SubsystemRAII<FileSystem> subsystems;
if (test_arg) {
Pipe pipe(LLDB_INVALID_PIPE, (lldb::pipe_t)test_arg.getValue());
llvm::Expected<size_t> bytes_written =
pipe.Write(test_msg.data(), test_msg.size());
if (bytes_written && *bytes_written == test_msg.size())
exit(0);
exit(1);
}
Pipe pipe;
ASSERT_THAT_ERROR(pipe.CreateNew().takeError(), llvm::Succeeded());
SCOPED_TRACE(llvm::formatv("Pipe handles are: {0}/{1}",
(uint64_t)pipe.GetReadPipe(),
(uint64_t)pipe.GetWritePipe())
.str());
ProcessLaunchInfo info;
info.SetExecutableFile(FileSpec(TestMainArgv0),
/*add_exe_file_as_first_arg=*/true);
info.GetArguments().AppendArgument(
"--gtest_filter=Host.LaunchProcessDuplicatesHandle");
info.GetArguments().AppendArgument(
("--test-arg=" + llvm::Twine((uint64_t)pipe.GetWritePipe())).str());
info.AppendDuplicateFileAction((uint64_t)pipe.GetWritePipe(),
(uint64_t)pipe.GetWritePipe());
info.SetMonitorProcessCallback(&ProcessLaunchInfo::NoOpMonitorCallback);
ASSERT_THAT_ERROR(Host::LaunchProcess(info).takeError(), llvm::Succeeded());
pipe.CloseWriteFileDescriptor();
char msg[100];
llvm::Expected<size_t> bytes_read =
pipe.Read(msg, sizeof(msg), std::chrono::seconds(10));
ASSERT_THAT_EXPECTED(bytes_read, llvm::Succeeded());
ASSERT_EQ(llvm::StringRef(msg, *bytes_read), test_msg);
}
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