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//===----------------------------------------------------------------------===//
//
// 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/Support/Program.h"
#include "llvm/CAS/MappedFileRegionArena.h"
#include "llvm/Config/llvm-config.h"
#include "llvm/Support/ConvertUTF.h"
#include "llvm/Support/ExponentialBackoff.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/ThreadPool.h"
#include "llvm/Testing/Support/Error.h"
#include "gtest/gtest.h"
#if defined(__APPLE__)
#include <crt_externs.h>
#elif !defined(_MSC_VER)
// Forward declare environ in case it's not provided by stdlib.h.
extern char **environ;
#endif
using namespace llvm;
using namespace llvm::cas;
#if LLVM_ENABLE_ONDISK_CAS
extern const char *TestMainArgv0;
static char ProgramID = 0;
class CASProgramTest : public testing::Test {
std::vector<StringRef> EnvTable;
std::vector<std::string> EnvStorage;
protected:
void SetUp() override {
auto EnvP = [] {
#if defined(_WIN32)
_wgetenv(L"TMP"); // Populate _wenviron, initially is null
return _wenviron;
#elif defined(__APPLE__)
return *_NSGetEnviron();
#else
return environ;
#endif
}();
ASSERT_TRUE(EnvP);
auto prepareEnvVar = [this](decltype(*EnvP) Var) -> StringRef {
#if defined(_WIN32)
// On Windows convert UTF16 encoded variable to UTF8
auto Len = wcslen(Var);
ArrayRef<char> Ref{reinterpret_cast<char const *>(Var),
Len * sizeof(*Var)};
EnvStorage.emplace_back();
auto convStatus = llvm::convertUTF16ToUTF8String(Ref, EnvStorage.back());
EXPECT_TRUE(convStatus);
return EnvStorage.back();
#else
(void)this;
return StringRef(Var);
#endif
};
while (*EnvP != nullptr) {
auto S = prepareEnvVar(*EnvP);
if (!StringRef(S).starts_with("GTEST_"))
EnvTable.emplace_back(S);
++EnvP;
}
}
void TearDown() override {
EnvTable.clear();
EnvStorage.clear();
}
void addEnvVar(StringRef Var) { EnvTable.emplace_back(Var); }
ArrayRef<StringRef> getEnviron() const { return EnvTable; }
};
static Error emptyConstructor(MappedFileRegionArena &) {
return Error::success();
}
TEST_F(CASProgramTest, MappedFileRegionArenaTest) {
auto TestAllocator = [](StringRef Path) {
std::optional<MappedFileRegionArena> Alloc;
ASSERT_THAT_ERROR(
MappedFileRegionArena::create(Path, /*Capacity=*/10 * 1024 * 1024,
/*HeaderOffset=*/0, emptyConstructor)
.moveInto(Alloc),
Succeeded());
std::vector<unsigned *> AllocatedPtr;
AllocatedPtr.resize(100);
DefaultThreadPool Threads;
for (unsigned I = 0; I < 100; ++I) {
Threads.async(
[&](unsigned Idx) {
// Allocate a buffer that is larger than needed so allocator hits
// additional pages for test coverage.
unsigned *P = (unsigned *)cantFail(Alloc->allocate(100));
*P = Idx;
AllocatedPtr[Idx] = P;
},
I);
}
Threads.wait();
for (unsigned I = 0; I < 100; ++I)
EXPECT_EQ(*AllocatedPtr[I], I);
};
if (const char *File = getenv("LLVM_CAS_TEST_MAPPED_FILE_REGION")) {
TestAllocator(File);
exit(0);
}
SmallString<128> FilePath;
sys::fs::createUniqueDirectory("MappedFileRegionArena", FilePath);
sys::path::append(FilePath, "allocation-file");
std::string Executable =
sys::fs::getMainExecutable(TestMainArgv0, &ProgramID);
StringRef Argv[] = {
Executable, "--gtest_filter=CASProgramTest.MappedFileRegionArenaTest"};
// Add LLVM_PROGRAM_TEST_LOCKED_FILE to the environment of the child.
std::string EnvVar = "LLVM_CAS_TEST_MAPPED_FILE_REGION=";
EnvVar += FilePath.str();
addEnvVar(EnvVar);
std::string Error;
bool ExecutionFailed;
sys::ProcessInfo PI = sys::ExecuteNoWait(Executable, Argv, getEnviron(), {},
0, &Error, &ExecutionFailed);
TestAllocator(FilePath);
ASSERT_FALSE(ExecutionFailed) << Error;
ASSERT_NE(PI.Pid, sys::ProcessInfo::InvalidPid) << "Invalid process id";
PI = llvm::sys::Wait(PI, /*SecondsToWait=*/5, &Error);
ASSERT_TRUE(PI.ReturnCode == 0);
ASSERT_TRUE(Error.empty());
// Clean up after both processes finish testing.
sys::fs::remove(FilePath);
sys::fs::remove_directories(sys::path::parent_path(FilePath));
}
TEST_F(CASProgramTest, MappedFileRegionArenaSizeTest) {
using namespace std::chrono_literals;
if (const char *File = getenv("LLVM_CAS_TEST_MAPPED_FILE_REGION")) {
ExponentialBackoff Backoff(5s);
do {
if (sys::fs::exists(File)) {
break;
}
} while (Backoff.waitForNextAttempt());
std::optional<MappedFileRegionArena> Alloc;
ASSERT_THAT_ERROR(MappedFileRegionArena::create(File, /*Capacity=*/1024,
/*HeaderOffset=*/0,
emptyConstructor)
.moveInto(Alloc),
Succeeded());
ASSERT_TRUE(Alloc->capacity() == 2048);
Alloc.reset();
ASSERT_THAT_ERROR(MappedFileRegionArena::create(File, /*Capacity=*/4096,
/*HeaderOffset=*/0,
emptyConstructor)
.moveInto(Alloc),
Succeeded());
ASSERT_TRUE(Alloc->capacity() == 2048);
Alloc.reset();
ASSERT_THAT_ERROR(
MappedFileRegionArena::create(File, /*Capacity=*/2048,
/*HeaderOffset=*/32, emptyConstructor)
.moveInto(Alloc),
FailedWithMessage(
"specified header offset (32) does not match existing config (0)"));
ASSERT_THAT_ERROR(MappedFileRegionArena::create(File, /*Capacity=*/2048,
/*HeaderOffset=*/0,
emptyConstructor)
.moveInto(Alloc),
Succeeded());
exit(0);
}
SmallString<128> FilePath;
sys::fs::createUniqueDirectory("MappedFileRegionArena", FilePath);
sys::path::append(FilePath, "allocation-file");
std::string Executable =
sys::fs::getMainExecutable(TestMainArgv0, &ProgramID);
StringRef Argv[] = {
Executable,
"--gtest_filter=CASProgramTest.MappedFileRegionArenaSizeTest"};
// Add LLVM_PROGRAM_TEST_LOCKED_FILE to the environment of the child.
std::string EnvVar = "LLVM_CAS_TEST_MAPPED_FILE_REGION=";
EnvVar += FilePath.str();
addEnvVar(EnvVar);
std::optional<MappedFileRegionArena> Alloc;
ASSERT_THAT_ERROR(MappedFileRegionArena::create(FilePath, /*Capacity=*/2048,
/*HeaderOffset=*/0,
emptyConstructor)
.moveInto(Alloc),
Succeeded());
std::string Error;
bool ExecutionFailed;
sys::ProcessInfo PI = sys::ExecuteNoWait(Executable, Argv, getEnviron(), {},
0, &Error, &ExecutionFailed);
ASSERT_FALSE(ExecutionFailed) << Error;
ASSERT_NE(PI.Pid, sys::ProcessInfo::InvalidPid) << "Invalid process id";
PI = llvm::sys::Wait(PI, /*SecondsToWait=*/100, &Error);
ASSERT_TRUE(PI.ReturnCode == 0);
ASSERT_TRUE(Error.empty());
// Size is still the requested 2048.
ASSERT_TRUE(Alloc->capacity() == 2048);
// Clean up after both processes finish testing.
sys::fs::remove(FilePath);
sys::fs::remove_directories(sys::path::parent_path(FilePath));
}
#endif // LLVM_ENABLE_ONDISK_CAS
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