Method copyMemoryFromProcess

src/pystack/_pystack/mem.cpp:295–320

}

ssize_t
ProcessMemoryManager::copyMemoryFromProcess(remote_addr_t addr, size_t len, void* dst) const
{
    auto vmap = std::find_if(d_vmaps.begin(), d_vmaps.end(), [&](const auto& vmap) {
        return vmap.containsAddr(addr) && vmap.containsAddr(addr + len - 1);
    });

    if (vmap == d_vmaps.end() || !d_lru_cache.can_fit(vmap->Size())) {
        return readChunk(addr, len, reinterpret_cast<char*>(dst));
    }

    uintptr_t key = vmap->Start();
    size_t chunk_size = vmap->Size();
    remote_addr_t vmap_start_addr = vmap->Start();
    size_t offset_addr = addr - vmap_start_addr;

    if (!d_lru_cache.exists(key)) {
        std::vector<char> buf(chunk_size);
        readChunk(vmap_start_addr, chunk_size, buf.data());
        d_lru_cache.put(key, std::move(buf));
    }

    std::memcpy(dst, d_lru_cache.get(key).data() + offset_addr, len);

    return len;
}

bool
ProcessMemoryManager::isAddressValid(remote_addr_t addr, const VirtualMap& map) const