demangle.cpp
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#include "crucible/core/demangle.inl"
#include <cstdlib>
#include "crucible/core/platform.hpp"
#ifdef CRUCIBLE_PLATFORM_IS_POSIX_LIKE
#include <cxxabi.h>
#endif // CRUCIBLE_PLATFORM_IS_POSIX_LIKE
namespace crucible::core
{
auto Insufficient_Demangle_Memory::describe() const -> String
{
return String { "Failed to allocate memory for symbol demangling" };
}
auto Invalid_Demangle_Arguments::describe() const -> String
{
return String { "Demangler called with invalid arguments" };
}
auto Unknown_Demangle_Error::describe() const -> String
{
return String { "Unknown demangler error" };
}
auto demangle(FFI_String<char> const &mangled_symbol) -> Demangle_Result<FFI_String<char>>
{
#ifdef CRUCIBLE_PLATFORM_IS_POSIX_LIKE
char *demangled_symbol_data { nullptr };
std::size_t demangled_symbol_size { 0 };
int demangled_symbol_status { 0 };
demangled_symbol_data = abi::__cxa_demangle(mangled_symbol.data(), nullptr, &demangled_symbol_size, &demangled_symbol_status);
FFI_String<char> demangled_symbol;
if (demangled_symbol_data) {
demangled_symbol = make_ffi_string(demangled_symbol_data, demangled_symbol_size);
std::free(demangled_symbol_data);
}
if (demangled_symbol_status == 0) {
return make_success<FFI_String<char>>(demangled_symbol.data(), demangled_symbol.size());
}
if (demangled_symbol_status == -1) {
return make_failure<Demangle_Error>(Insufficient_Demangle_Memory {});
}
if (demangled_symbol_status == -2) {
return make_success(mangled_symbol);
}
if (demangled_symbol_status == -3) {
return make_failure<Demangle_Error>(Invalid_Demangle_Arguments {});
}
return make_failure<Demangle_Error>(Unknown_Demangle_Error {});
#endif // CRUCIBLE_PLATFORM_IS_POSIX_LIKE
#ifdef CRUCIBLE_PLATFORM_IS_WINDOWS_LIKE
// MSVC already gives us unmangled symbols from everywhere that matters
return make_success(mangled_symbol);
#endif // CRUCIBLE_PLATFORM_IS_WINDOWS_LIKE
}
}