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//===- Error.cpp - system_error extensions for lld --------------*- C++ -*-===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lld/Core/Error.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Support/ErrorHandling.h"
#include <mutex>
#include <string>
#include <vector>
using namespace lld;
class _NativeReaderErrorCategory : public std::error_category {
public:
const char* name() const LLVM_NOEXCEPT override {
return "lld.native.reader";
}
std::string message(int ev) const override {
switch (static_cast<NativeReaderError>(ev)) {
case NativeReaderError::success:
return "Success";
case NativeReaderError::unknown_file_format:
return "Unknown file format";
case NativeReaderError::file_too_short:
return "file truncated";
case NativeReaderError::file_malformed:
return "file malformed";
case NativeReaderError::memory_error:
return "out of memory";
case NativeReaderError::unknown_chunk_type:
return "unknown chunk type";
case NativeReaderError::conflicting_target_machine:
return "conflicting target machine";
}
llvm_unreachable("An enumerator of NativeReaderError does not have a "
"message defined.");
}
};
const std::error_category &lld::native_reader_category() {
static _NativeReaderErrorCategory o;
return o;
}
class _YamlReaderErrorCategory : public std::error_category {
public:
const char* name() const LLVM_NOEXCEPT override {
return "lld.yaml.reader";
}
std::string message(int ev) const override {
switch (static_cast<YamlReaderError>(ev)) {
case YamlReaderError::success:
return "Success";
case YamlReaderError::unknown_keyword:
return "Unknown keyword found in yaml file";
case YamlReaderError::illegal_value:
return "Bad value found in yaml file";
}
llvm_unreachable("An enumerator of YamlReaderError does not have a "
"message defined.");
}
};
const std::error_category &lld::YamlReaderCategory() {
static _YamlReaderErrorCategory o;
return o;
}
class _LinkerScriptReaderErrorCategory : public std::error_category {
public:
const char *name() const LLVM_NOEXCEPT override {
return "lld.linker-script.reader";
}
std::string message(int ev) const override {
switch (static_cast<LinkerScriptReaderError>(ev)) {
case LinkerScriptReaderError::success:
return "Success";
case LinkerScriptReaderError::parse_error:
return "Error parsing linker script";
}
llvm_unreachable("An enumerator of LinkerScriptReaderError does not have a "
"message defined.");
}
};
const std::error_category &lld::LinkerScriptReaderCategory() {
static _LinkerScriptReaderErrorCategory o;
return o;
}
namespace lld {
/// Temporary class to enable make_dynamic_error_code() until
/// llvm::ErrorOr<> is updated to work with error encapsulations
/// other than error_code.
class dynamic_error_category : public std::error_category {
public:
~dynamic_error_category() LLVM_NOEXCEPT {}
const char *name() const LLVM_NOEXCEPT override {
return "lld.dynamic_error";
}
std::string message(int ev) const override {
assert(ev >= 0);
assert(ev < (int)_messages.size());
// The value is an index into the string vector.
return _messages[ev];
}
int add(std::string msg) {
std::lock_guard<std::recursive_mutex> lock(_mutex);
// Value zero is always the successs value.
if (_messages.empty())
_messages.push_back("Success");
_messages.push_back(msg);
// Return the index of the string just appended.
return _messages.size() - 1;
}
private:
std::vector<std::string> _messages;
std::recursive_mutex _mutex;
};
static dynamic_error_category categorySingleton;
std::error_code make_dynamic_error_code(StringRef msg) {
return std::error_code(categorySingleton.add(msg), categorySingleton);
}
std::error_code make_dynamic_error_code(const Twine &msg) {
return std::error_code(categorySingleton.add(msg.str()), categorySingleton);
}
}
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