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//===-- llvm-debuginfod.cpp - federating debuginfod server ----------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
///
/// \file
/// This file contains the llvm-debuginfod tool, which serves the debuginfod
/// protocol over HTTP. The tool periodically scans zero or more filesystem
/// directories for ELF binaries to serve, and federates requests for unknown
/// build IDs to the debuginfod servers set in the DEBUGINFOD_URLS environment
/// variable.
///
//===----------------------------------------------------------------------===//
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Debuginfod/Debuginfod.h"
#include "llvm/Debuginfod/HTTPClient.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Option/Option.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/LLVMDriver.h"
#include "llvm/Support/ThreadPool.h"
using namespace llvm;
// Command-line option boilerplate.
namespace {
enum ID {
OPT_INVALID = 0, // This is not an option ID.
#define OPTION(...) LLVM_MAKE_OPT_ID(__VA_ARGS__),
#include "Opts.inc"
#undef OPTION
};
#define PREFIX(NAME, VALUE) \
static constexpr StringLiteral NAME##_init[] = VALUE; \
static constexpr ArrayRef<StringLiteral> NAME(NAME##_init, \
std::size(NAME##_init) - 1);
#include "Opts.inc"
#undef PREFIX
using namespace llvm::opt;
static constexpr opt::OptTable::Info InfoTable[] = {
#define OPTION(...) LLVM_CONSTRUCT_OPT_INFO(__VA_ARGS__),
#include "Opts.inc"
#undef OPTION
};
class DebuginfodOptTable : public opt::GenericOptTable {
public:
DebuginfodOptTable() : GenericOptTable(InfoTable) {}
};
} // end anonymous namespace
// Options
static unsigned Port;
static std::string HostInterface;
static int ScanInterval;
static double MinInterval;
static size_t MaxConcurrency;
static bool VerboseLogging;
static std::vector<std::string> ScanPaths;
ExitOnError ExitOnErr;
template <typename T>
static void parseIntArg(const opt::InputArgList &Args, int ID, T &Value,
T Default) {
if (const opt::Arg *A = Args.getLastArg(ID)) {
StringRef V(A->getValue());
if (!llvm::to_integer(V, Value, 0)) {
errs() << A->getSpelling() + ": expected an integer, but got '" + V + "'";
exit(1);
}
} else {
Value = Default;
}
}
static void parseArgs(int argc, char **argv) {
DebuginfodOptTable Tbl;
llvm::StringRef ToolName = argv[0];
llvm::BumpPtrAllocator A;
llvm::StringSaver Saver{A};
opt::InputArgList Args =
Tbl.parseArgs(argc, argv, OPT_UNKNOWN, Saver, [&](StringRef Msg) {
llvm::errs() << Msg << '\n';
std::exit(1);
});
if (Args.hasArg(OPT_help)) {
Tbl.printHelp(llvm::outs(),
"llvm-debuginfod [options] <Directories to scan>",
ToolName.str().c_str());
std::exit(0);
}
VerboseLogging = Args.hasArg(OPT_verbose_logging);
ScanPaths = Args.getAllArgValues(OPT_INPUT);
parseIntArg(Args, OPT_port, Port, 0u);
parseIntArg(Args, OPT_scan_interval, ScanInterval, 300);
parseIntArg(Args, OPT_max_concurrency, MaxConcurrency, size_t(0));
if (const opt::Arg *A = Args.getLastArg(OPT_min_interval)) {
StringRef V(A->getValue());
if (!llvm::to_float(V, MinInterval)) {
errs() << A->getSpelling() + ": expected a number, but got '" + V + "'";
exit(1);
}
} else {
MinInterval = 10.0;
}
HostInterface = Args.getLastArgValue(OPT_host_interface, "0.0.0.0");
}
int llvm_debuginfod_main(int argc, char **argv, const llvm::ToolContext &) {
HTTPClient::initialize();
parseArgs(argc, argv);
SmallVector<StringRef, 1> Paths;
for (const std::string &Path : ScanPaths)
Paths.push_back(Path);
DefaultThreadPool Pool(hardware_concurrency(MaxConcurrency));
DebuginfodLog Log;
DebuginfodCollection Collection(Paths, Log, Pool, MinInterval);
DebuginfodServer Server(Log, Collection);
if (!Port)
Port = ExitOnErr(Server.Server.bind(HostInterface.c_str()));
else
ExitOnErr(Server.Server.bind(Port, HostInterface.c_str()));
Log.push("Listening on port " + Twine(Port).str());
Pool.async([&]() { ExitOnErr(Server.Server.listen()); });
Pool.async([&]() {
while (true) {
DebuginfodLogEntry Entry = Log.pop();
if (VerboseLogging) {
outs() << Entry.Message << "\n";
outs().flush();
}
}
});
if (Paths.size())
ExitOnErr(Collection.updateForever(std::chrono::seconds(ScanInterval)));
Pool.wait();
llvm_unreachable("The ThreadPool should never finish running its tasks.");
}
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