#include <dwarfinterpret/StackDump.hpp>

#include <dwarfinterpret/MemoryMap.hpp>
#include <cassert>
#include <iostream>  // FIXME
#include <cstring>

using namespace std;

StackDump StackDump::snapshot(uintptr_t rsp) {
    StackDump stack;

    MemoryMap memory_map;
    const MemoryMap::MapEntry& stack_region =
        memory_map[memory_map.id_of_address(rsp)];

    assert(stack_region.pathname == "[stack]");
    size_t stack_size = stack_region.mem_region.end - rsp;
    stack.stack = std::shared_ptr<cell_t>(new cell_t[stack_size]);
    cerr << "memcpy'ing " << stack_size << " bytes" << endl;
    memcpy(stack.stack.get(), (void*)rsp, stack_size); // FIXME way too brutal

    stack.offset = rsp;

    return stack;
}

StackDump::StackDump()
    : stack(nullptr), offset(0)
{}

StackDump::StackDump(const StackDump& oth) {
    this->operator=(oth);
}

StackDump& StackDump::operator=(const StackDump& oth) {
    stack = oth.stack;
    offset = oth.offset;
    return *this;
}