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//===-- llvm-remote-cache-test.cpp - Remote Cache Service -----------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// A server for of the remote cache service protocol, for testing purposes.
//
//===----------------------------------------------------------------------===//
#include "llvm/CAS/ActionCache.h"
#include "llvm/CAS/BuiltinUnifiedCASDatabases.h"
#include "llvm/CAS/ObjectStore.h"
#include "llvm/RemoteCachingService/LLVMCASCacheProvider.h"
#include "llvm/RemoteCachingService/RemoteCacheProvider.h"
#include "llvm/RemoteCachingService/RemoteCacheServer.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/InitLLVM.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Program.h"
#include "llvm/Support/raw_ostream.h"
#include <thread>
#ifdef _WIN32
#define setenv(name, var, ignore) _putenv_s(name, var)
#endif
using namespace llvm;
using namespace llvm::cas;
int main(int Argc, const char **Argv) {
InitLLVM X(Argc, Argv);
cl::OptionCategory OptCategory("llvm-remote-cache-test options");
cl::extrahelp MoreHelp(
"\n"
"Implements the remote caching gRPC protocol with an on-disk LLVMCAS as "
"the caching backend.\n"
"Supports two modes of operation:\n"
" * Start and run continuously as a server, or\n"
" * Start and run the given command, after setting the "
"LLVM_CACHE_REMOTE_SERVICE_SOCKET_PATH environment variable.\n"
" It exits with the same exit code as the command."
"\n");
cl::opt<std::string> CachePath("cache-path", cl::desc("Cache data path"),
cl::Required, cl::value_desc("path"),
cl::cat(OptCategory));
cl::opt<std::string> OptSocketPath(
"socket-path", cl::desc("Socket path (default is '<cache-path>/sock')"),
cl::value_desc("path"), cl::cat(OptCategory));
// This is here only to improve the help message (for "USAGE:" line).
cl::list<std::string> Inputs(cl::Positional, cl::desc("[-- command ...]"));
auto Sep = std::find_if(Argv + 1, Argv + Argc, [](const char *Arg) {
return StringRef(Arg) == "--";
});
bool ServerMode = Sep == Argv + Argc;
cl::HideUnrelatedOptions(OptCategory);
cl::ParseCommandLineOptions(Sep - Argv, Argv, "llvm-remote-cache-test");
SmallString<128> SocketPath{OptSocketPath};
if (SocketPath.empty()) {
SocketPath = CachePath;
sys::path::append(SocketPath, "sock");
}
static ExitOnError ExitOnErr("llvm-remote-cache-test: ");
SmallString<256> TempPath(CachePath);
sys::path::append(TempPath, "tmp");
if (std::error_code EC = sys::fs::create_directories(TempPath))
ExitOnErr(errorCodeToError(EC));
SmallString<256> CASPath(CachePath);
sys::path::append(CASPath, "cas");
std::unique_ptr<ObjectStore> CAS;
std::unique_ptr<ActionCache> AC;
std::tie(CAS, AC) = ExitOnErr(createOnDiskUnifiedCASDatabases(CASPath));
auto createServer = [&]() -> remote::RemoteCacheServer {
return remote::RemoteCacheServer(
SocketPath, remote::createLLVMCASCacheProvider(TempPath, std::move(CAS),
std::move(AC)));
};
if (ServerMode) {
outs() << "Server listening on " << SocketPath << '\n';
remote::RemoteCacheServer Server = createServer();
Server.Start();
Server.Listen();
return 0;
}
SmallVector<const char *, 256> CmdArgs(Sep + 1, Argv + Argc);
if (CmdArgs.empty()) {
// No command arguments.
cl::PrintHelpMessage();
return 1;
}
ErrorOr<std::string> ExecPathOrErr = sys::findProgramByName(CmdArgs.front());
if (!ExecPathOrErr) {
errs() << "error: cannot find executable " << CmdArgs.front() << '\n';
return 1;
}
std::string ExecPath = std::move(*ExecPathOrErr);
CmdArgs[0] = ExecPath.c_str();
SmallVector<StringRef, 32> RefArgs;
RefArgs.reserve(CmdArgs.size());
for (const char *Arg : CmdArgs) {
RefArgs.push_back(Arg);
}
remote::RemoteCacheServer Server = createServer();
// Make sure to start the server before executing the command.
Server.Start();
std::thread ServerThread([&Server]() { Server.Listen(); });
setenv("LLVM_CACHE_REMOTE_SERVICE_SOCKET_PATH", SocketPath.c_str(), true);
std::string ErrMsg;
int Result =
sys::ExecuteAndWait(RefArgs.front(), RefArgs, /*Env*/ std::nullopt,
/*Redirects*/ {}, /*SecondsToWait*/ 0,
/*MemoryLimit*/ 0, &ErrMsg);
if (!ErrMsg.empty()) {
errs() << "error: failed executing command: " << ErrMsg << '\n';
}
Server.Shutdown();
ServerThread.join();
return Result;
}
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