demangle_symbol.cpp

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#include <cstdlib>

#include "config.h"

#include "demangle_symbol.h"
#include "demangle_java_symbol.h"
#include "op_regex.h"

// from libiberty
#ifndef DMGL_PARAMS
# define DMGL_PARAMS     (1 << 0)        
#endif
#ifndef DMGL_ANSI
# define DMGL_ANSI       (1 << 1)        
#endif

extern "C" char * cplus_demangle(char const * mangled, int options);

using namespace std;

namespace options {
    extern demangle_type demangle;
}

string const demangle_symbol(string const & name)
{
    if (options::demangle == dmt_none)
        return name;

    // Do not try to strip leading underscore, as this leads to many
    // C++ demangling failures. However we strip off a leading '.'
        // as generated on PPC64
    string const & tmp = (name[0] == '.' ? name.substr(1) : name);
    char * unmangled = cplus_demangle(tmp.c_str(), DMGL_PARAMS | DMGL_ANSI);

    if (!unmangled) {
        string result = demangle_java_symbol(name);
        if (!result.empty())
            return result;
        return name;
    }

    string result(unmangled);
    free(unmangled);

    if (options::demangle == dmt_smart) {
        static bool init = false;
        static regular_expression_replace regex;
        if (init == false) {
            setup_regex(regex, OP_DATADIR "/stl.pat");
            init = true;
        }
        // we don't protect against exception here, pattern must be
        // right and user can easily work-around by using -d
        regex.execute(result);
    }

    return result;
}