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//===- unittest/Support/ProcessTest.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 "llvm/ADT/Triple.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/Process.h"
#include "gtest/gtest.h"
#ifdef _WIN32
#include <windows.h>
#endif
namespace {
using namespace llvm;
using namespace sys;
TEST(ProcessTest, GetProcessIdTest) {
const Process::Pid pid = Process::getProcessId();
#ifdef _WIN32
EXPECT_EQ((DWORD)pid, ::GetCurrentProcessId());
#else
EXPECT_EQ(pid, ::getpid());
#endif
}
TEST(ProcessTest, GetRandomNumberTest) {
const unsigned r1 = Process::GetRandomNumber();
const unsigned r2 = Process::GetRandomNumber();
// It should be extremely unlikely that both r1 and r2 are 0.
EXPECT_NE((r1 | r2), 0u);
}
#ifdef _MSC_VER
#define setenv(name, var, ignore) _putenv_s(name, var)
#endif
#if HAVE_SETENV || _MSC_VER
TEST(ProcessTest, Basic) {
setenv("__LLVM_TEST_ENVIRON_VAR__", "abc", true);
Optional<std::string> val(Process::GetEnv("__LLVM_TEST_ENVIRON_VAR__"));
EXPECT_TRUE(val.hasValue());
EXPECT_STREQ("abc", val->c_str());
}
TEST(ProcessTest, None) {
Optional<std::string> val(
Process::GetEnv("__LLVM_TEST_ENVIRON_NO_SUCH_VAR__"));
EXPECT_FALSE(val.hasValue());
}
#endif
#ifdef _WIN32
TEST(ProcessTest, EmptyVal) {
SetEnvironmentVariableA("__LLVM_TEST_ENVIRON_VAR__", "");
Optional<std::string> val(Process::GetEnv("__LLVM_TEST_ENVIRON_VAR__"));
EXPECT_TRUE(val.hasValue());
EXPECT_STREQ("", val->c_str());
}
TEST(ProcessTest, Wchar) {
SetEnvironmentVariableW(L"__LLVM_TEST_ENVIRON_VAR__", L"abcdefghijklmnopqrs");
Optional<std::string> val(Process::GetEnv("__LLVM_TEST_ENVIRON_VAR__"));
EXPECT_TRUE(val.hasValue());
EXPECT_STREQ("abcdefghijklmnopqrs", val->c_str());
}
#endif
class PageSizeTest : public testing::Test {
Triple Host;
protected:
PageSizeTest() : Host(Triple::normalize(sys::getProcessTriple())) {}
bool isSupported() const {
// For now just on X86-64 and Aarch64. This can be expanded in the future.
return (Host.getArch() == Triple::x86_64 ||
Host.getArch() == Triple::aarch64) &&
Host.getOS() == Triple::Linux;
}
bool pageSizeAsExpected(unsigned PageSize) const {
switch (Host.getArch()) {
case Triple::x86_64:
return PageSize == 4096;
case Triple::aarch64:
// supported granule sizes are 4k, 16k and 64k
return PageSize == 4096 || PageSize == 16384 || PageSize == 65536;
default:
llvm_unreachable("unexpected arch!");
}
}
};
TEST_F(PageSizeTest, PageSize) {
if (!isSupported())
return;
llvm::Expected<unsigned> Result = llvm::sys::Process::getPageSize();
ASSERT_FALSE(!Result);
ASSERT_TRUE(pageSizeAsExpected(*Result));
}
} // end anonymous namespace
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