forked from OSchip/llvm-project
128 lines
4.0 KiB
C++
128 lines
4.0 KiB
C++
//===- Error.cpp - system_error extensions for lld --------------*- C++ -*-===//
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//
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// The LLVM Linker
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "lld/Core/Error.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/Support/ErrorHandling.h"
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#include <mutex>
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#include <string>
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#include <vector>
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using namespace lld;
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class _YamlReaderErrorCategory : public std::error_category {
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public:
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const char* name() const LLVM_NOEXCEPT override {
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return "lld.yaml.reader";
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}
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std::string message(int ev) const override {
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switch (static_cast<YamlReaderError>(ev)) {
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case YamlReaderError::unknown_keyword:
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return "Unknown keyword found in yaml file";
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case YamlReaderError::illegal_value:
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return "Bad value found in yaml file";
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}
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llvm_unreachable("An enumerator of YamlReaderError does not have a "
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"message defined.");
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}
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};
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const std::error_category &lld::YamlReaderCategory() {
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static _YamlReaderErrorCategory o;
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return o;
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}
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class _LinkerScriptReaderErrorCategory : public std::error_category {
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public:
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const char *name() const LLVM_NOEXCEPT override {
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return "lld.linker-script.reader";
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}
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std::string message(int ev) const override {
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switch (static_cast<LinkerScriptReaderError>(ev)) {
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case LinkerScriptReaderError::success:
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return "Success";
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case LinkerScriptReaderError::parse_error:
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return "Error parsing linker script";
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case LinkerScriptReaderError::unknown_symbol_in_expr:
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return "Unknown symbol found when evaluating linker script expression";
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case LinkerScriptReaderError::unrecognized_function_in_expr:
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return "Unrecognized function call when evaluating linker script "
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"expression";
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case LinkerScriptReaderError::unknown_phdr_ids:
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return "Unknown header identifiers (missing in PHDRS command) are used";
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case LinkerScriptReaderError::extra_program_phdr:
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return "Extra program header is found";
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case LinkerScriptReaderError::misplaced_program_phdr:
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return "Program header must precede load segments";
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case LinkerScriptReaderError::program_phdr_wrong_phdrs:
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return "Program header has invalid PHDRS attribute";
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}
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llvm_unreachable("An enumerator of LinkerScriptReaderError does not have a "
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"message defined.");
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}
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};
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const std::error_category &lld::LinkerScriptReaderCategory() {
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static _LinkerScriptReaderErrorCategory o;
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return o;
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}
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namespace lld {
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/// Temporary class to enable make_dynamic_error_code() until
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/// llvm::ErrorOr<> is updated to work with error encapsulations
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/// other than error_code.
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class dynamic_error_category : public std::error_category {
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public:
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~dynamic_error_category() override = default;
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const char *name() const LLVM_NOEXCEPT override {
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return "lld.dynamic_error";
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}
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std::string message(int ev) const override {
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assert(ev >= 0);
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assert(ev < (int)_messages.size());
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// The value is an index into the string vector.
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return _messages[ev];
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}
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int add(std::string msg) {
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std::lock_guard<std::recursive_mutex> lock(_mutex);
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// Value zero is always the successs value.
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if (_messages.empty())
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_messages.push_back("Success");
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_messages.push_back(msg);
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// Return the index of the string just appended.
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return _messages.size() - 1;
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}
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private:
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std::vector<std::string> _messages;
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std::recursive_mutex _mutex;
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};
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static dynamic_error_category categorySingleton;
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std::error_code make_dynamic_error_code(const char *msg) {
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return make_dynamic_error_code(StringRef(msg));
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}
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std::error_code make_dynamic_error_code(StringRef msg) {
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return std::error_code(categorySingleton.add(msg), categorySingleton);
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}
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std::error_code make_dynamic_error_code(const Twine &msg) {
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return std::error_code(categorySingleton.add(msg.str()), categorySingleton);
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}
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} // namespace lld
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