symtab.cc

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/*
 * Copyright (c) 2002-2005 The Regents of The University of Michigan
 * All rights reserved.
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 * this software without specific prior written permission.
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#include "base/loader/symtab.hh"
 
#include <fstream>
#include <iostream>
 
#include "base/logging.hh"
#include "base/str.hh"
 
namespace gem5
{
 
namespace loader
{
 
SymbolTable debugSymbolTable;
 
void
SymbolTable::clear()
{
    addrMap.clear();
    nameMap.clear();
    symbols.clear();
}
 
bool
SymbolTable::insert(const Symbol &symbol)
{
    if (symbol.name.empty())
        return false;
 
    int idx = symbols.size();
 
    if (!nameMap.insert({ symbol.name, idx }).second)
        return false;
 
    // There can be multiple symbols for the same address, so always
    // update the addrTable multimap when we see a new symbol name.
    addrMap.insert({ symbol.address, idx });
 
    symbols.emplace_back(symbol);
 
    return true;
}
 
bool
SymbolTable::insert(const SymbolTable &other)
{
    // Check if any symbol in other already exists in our table.
    NameMap intersection;
    std::set_intersection(other.nameMap.begin(), other.nameMap.end(),
                          nameMap.begin(), nameMap.end(),
                          std::inserter(intersection, intersection.begin()),
                          nameMap.value_comp());
    if (!intersection.empty())
        return false;
 
    for (const Symbol &symbol: other)
        insert(symbol);
 
    return true;
}
 
void
SymbolTable::serialize(const std::string &base, CheckpointOut &cp) const
{
    paramOut(cp, base + ".size", symbols.size());
 
    int i = 0;
    for (auto &symbol: symbols) {
        paramOut(cp, csprintf("%s.addr_%d", base, i), symbol.address);
        paramOut(cp, csprintf("%s.symbol_%d", base, i), symbol.name);
        paramOut(cp, csprintf("%s.binding_%d", base, i), (int)symbol.binding);
        i++;
    }
}
 
void
SymbolTable::unserialize(const std::string &base, CheckpointIn &cp,
                         Symbol::Binding default_binding)
{
    clear();
    int size;
    paramIn(cp, base + ".size", size);
    for (int i = 0; i < size; ++i) {
        Addr address;
        std::string name;
        Symbol::Binding binding = default_binding;
 
        paramIn(cp, csprintf("%s.addr_%d", base, i), address);
        paramIn(cp, csprintf("%s.symbol_%d", base, i), name);
        if (!optParamIn(cp, csprintf("%s.binding_%d", base, i), binding))
            binding = default_binding;
        insert({binding, name, address});
    }
}
 
} // namespace loader
} // namespace gem5