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//===-- lib/DebugInfo/Symbolize/DIFetcher.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
//
//===----------------------------------------------------------------------===//
///
/// \file
/// This file defines the implementation of the local debug info fetcher, which
/// searches cache directories.
///
//===----------------------------------------------------------------------===//
#include "llvm/DebugInfo/Symbolize/DIFetcher.h"
#include "llvm/Debuginfod/Debuginfod.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
namespace llvm {
namespace symbolize {
Optional<std::string>
LocalDIFetcher::fetchBuildID(ArrayRef<uint8_t> BuildID) const {
auto GetDebugPath = [&](StringRef Directory) {
SmallString<128> Path{Directory};
sys::path::append(Path, ".build-id",
llvm::toHex(BuildID[0], /*LowerCase=*/true),
llvm::toHex(BuildID.slice(1), /*LowerCase=*/true));
Path += ".debug";
return Path;
};
if (DebugFileDirectory.empty()) {
SmallString<128> Path = GetDebugPath(
#if defined(__NetBSD__)
// Try /usr/libdata/debug/.build-id/../...
"/usr/libdata/debug"
#else
// Try /usr/lib/debug/.build-id/../...
"/usr/lib/debug"
#endif
);
if (llvm::sys::fs::exists(Path))
return std::string(Path);
} else {
for (const auto &Directory : DebugFileDirectory) {
// Try <debug-file-directory>/.build-id/../...
SmallString<128> Path = GetDebugPath(Directory);
if (llvm::sys::fs::exists(Path))
return std::string(Path);
}
}
return None;
}
} // namespace symbolize
} // namespace llvm
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