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//===-- RichManglingContext.h -----------------------------------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
#ifndef LLDB_CORE_RICHMANGLINGCONTEXT_H
#define LLDB_CORE_RICHMANGLINGCONTEXT_H
#include "lldb/lldb-forward.h"
#include "lldb/lldb-private.h"
#include "lldb/Utility/ConstString.h"
#include "llvm/ADT/Any.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Demangle/Demangle.h"
namespace lldb_private {
/// Uniform wrapper for access to rich mangling information from different
/// providers. See Mangled::DemangleWithRichManglingInfo()
class RichManglingContext {
public:
RichManglingContext() : m_provider(None), m_ipd_buf_size(2048) {
m_ipd_buf = static_cast<char *>(std::malloc(m_ipd_buf_size));
m_ipd_buf[0] = '\0';
}
~RichManglingContext() { std::free(m_ipd_buf); }
/// Use the ItaniumPartialDemangler to obtain rich mangling information from
/// the given mangled name.
bool FromItaniumName(ConstString mangled);
/// Use the legacy language parser implementation to obtain rich mangling
/// information from the given demangled name.
bool FromCxxMethodName(ConstString demangled);
/// If this symbol describes a constructor or destructor.
bool IsCtorOrDtor() const;
/// If this symbol describes a function.
bool IsFunction() const;
/// Get the base name of a function. This doesn't include trailing template
/// arguments, ie "a::b<int>" gives "b". The result will overwrite the
/// internal buffer. It can be obtained via GetBufferRef().
void ParseFunctionBaseName();
/// Get the context name for a function. For "a::b::c", this function returns
/// "a::b". The result will overwrite the internal buffer. It can be obtained
/// via GetBufferRef().
void ParseFunctionDeclContextName();
/// Get the entire demangled name. The result will overwrite the internal
/// buffer. It can be obtained via GetBufferRef().
void ParseFullName();
/// Obtain a StringRef to the internal buffer that holds the result of the
/// most recent ParseXy() operation. The next ParseXy() call invalidates it.
llvm::StringRef GetBufferRef() const {
assert(m_provider != None && "Initialize a provider first");
return m_buffer;
}
private:
enum InfoProvider { None, ItaniumPartialDemangler, PluginCxxLanguage };
/// Selects the rich mangling info provider.
InfoProvider m_provider;
/// Reference to the buffer used for results of ParseXy() operations.
llvm::StringRef m_buffer;
/// Members for ItaniumPartialDemangler
llvm::ItaniumPartialDemangler m_ipd;
char *m_ipd_buf;
size_t m_ipd_buf_size;
/// Members for PluginCxxLanguage
/// Cannot forward declare inner class CPlusPlusLanguage::MethodName. The
/// respective header is in Plugins and including it from here causes cyclic
/// dependency. Instead keep a llvm::Any and cast it on-access in the cpp.
llvm::Any m_cxx_method_parser;
/// Clean up memory and set a new info provider for this instance.
void ResetProvider(InfoProvider new_provider);
/// Uniform handling of string buffers for ItaniumPartialDemangler.
void processIPDStrResult(char *ipd_res, size_t res_len);
/// Cast the given parser to the given type. Ideally we would have a type
/// trait to deduce \a ParserT from a given InfoProvider, but unfortunately we
/// can't access CPlusPlusLanguage::MethodName from within the header.
template <class ParserT> static ParserT *get(llvm::Any parser) {
assert(parser.hasValue());
assert(llvm::any_isa<ParserT *>(parser));
return llvm::any_cast<ParserT *>(parser);
}
};
} // namespace lldb_private
#endif
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