#include <cstring>
#include <type_traits>
+#include <string>
+#include <vector>
+
#include "src/mc/mc_forward.hpp"
#include "src/mc/RemotePtr.hpp"
static constexpr ReadOptions lazy() { return ReadOptions(1); }
};
-/** A value from another process
+/** HACK, A value from another process
*
* This represents a value from another process:
*
* cross-architecture (such as 32-bit/64-bit access).
*/
template<class T>
-class Remote {
+union Remote {
private:
- // If we use a union, it won't work with abstract types:
- char buffer[sizeof(T)];
+ T buffer;
public:
- // HACK, some code currently cast this to T* which is **not** legal.
- void* data() { return buffer; }
- const void* data() const { return buffer; }
- constexpr std::size_t size() const { return sizeof(T); }
- operator T() const {
- static_assert(std::is_trivial<T>::value, "Cannot convert non trivial type");
- T res;
- std::memcpy(&res, buffer, sizeof(T));
- return res;
- }
Remote() {}
- Remote(T const& x)
+ ~Remote() {}
+ Remote(Remote const& that)
{
- std::memcpy(&x, buffer, sizeof(T));
+ std::memcpy(&buffer, &that.buffer, sizeof(buffer));
}
- Remote& operator=(T const& x)
+ Remote& operator=(Remote const& that)
{
- std::memcpy(&x, buffer, sizeof(T));
+ std::memcpy(&buffer, &that.buffer, sizeof(buffer));
+ return *this;
+ }
+ T* getBuffer() { return &buffer; }
+ const T* getBuffer() const { return &buffer; }
+ std::size_t getBufferSize() const { return sizeof(T); }
+ operator T() const {
+ static_assert(std::is_trivial<T>::value, "Cannot convert non trivial type");
+ return buffer;
+ }
+ void clear()
+ {
+ std::memset(static_cast<void*>(&buffer), 0, sizeof(T));
}
};
/** Read a given data structure from the address space */
template<class T> inline
- void read(T *buffer, RemotePtr<T> ptr, int process_index = ProcessIndexAny)
+ void read(T *buffer, RemotePtr<T> ptr, int process_index = ProcessIndexAny) const
{
this->read_bytes(buffer, sizeof(T), ptr, process_index);
}
template<class T> inline
- void read(Remote<T>& buffer, RemotePtr<T> ptr, int process_index = ProcessIndexAny)
+ void read(Remote<T>& buffer, RemotePtr<T> ptr, int process_index = ProcessIndexAny) const
{
- this->read_bytes(buffer.data(), sizeof(T), ptr, process_index);
+ this->read_bytes(buffer.getBuffer(), sizeof(T), ptr, process_index);
}
/** Read a given data structure from the address space */
template<class T> inline
- Remote<T> read(RemotePtr<T> ptr, int process_index = ProcessIndexMissing)
+ Remote<T> read(RemotePtr<T> ptr, int process_index = ProcessIndexMissing) const
{
Remote<T> res;
this->read_bytes(&res, sizeof(T), ptr, process_index);
return res;
}
+
+ std::string read_string(RemotePtr<char> address, std::size_t len) const
+ {
+ // TODO, use std::vector with .data() in C++17 to avoid useless copies
+ std::vector<char> buffer(len);
+ buffer[len] = '\0';
+ this->read_bytes(buffer.data(), len, address);
+ return std::string(buffer.data(), buffer.size());
+ }
+
};
}