#ifndef SIMGRID_MC_ADDRESS_SPACE_H
#define SIMGRID_MC_ADDRESS_SPACE_H
+#include <cassert>
#include <cstddef>
#include <cstdint>
+#include <cstring>
#include <type_traits>
-#include <xbt/misc.h>
+#include <string>
+#include <vector>
#include "src/mc/mc_forward.hpp"
+#include "src/mc/remote/RemotePtr.hpp"
namespace simgrid {
namespace mc {
-/** Pointer to a remote address-space (process, snapshot)
+/** Process index used when no process is available (SMPI privatization)
*
- * With this we can clearly identify the expected type of an address in the
- * remote process while avoiding to use native local pointers.
- *
- * Some operators (+/-) assume use the size of the underlying element. This
- * only works if the target applications is using the same target: it won't
- * work for example, when inspecting a 32 bit application from a 64 bit
- * model-checker.
- */
-template<class T> class remote_ptr {
- std::uint64_t address_;
-public:
- remote_ptr() : address_(0) {}
- remote_ptr(std::uint64_t address) : address_(address) {}
- remote_ptr(T* address) : address_((std::uintptr_t)address) {}
- std::uint64_t address() const { return address_; }
-
- operator bool() const
- {
- return address_;
- }
- bool operator!() const
- {
- return !address_;
- }
- operator remote_ptr<void>() const
- {
- return remote_ptr<void>(address_);
- }
- remote_ptr<T> operator+(std::uint64_t n) const
- {
- return remote_ptr<T>(address_ + n * sizeof(T));
- }
- remote_ptr<T> operator-(std::uint64_t n) const
- {
- return remote_ptr<T>(address_ - n * sizeof(T));
- }
- remote_ptr<T>& operator+=(std::uint64_t n)
- {
- address_ += n * sizeof(T);
- return *this;
- }
- remote_ptr<T>& operator-=(std::uint64_t n)
- {
- address_ -= n * sizeof(T);
- return *this;
- }
-};
-
-template<class X, class Y>
-bool operator<(remote_ptr<X> const& x, remote_ptr<Y> const& y)
-{
- return x.address() < y.address();
-}
-
-template<class X, class Y>
-bool operator>(remote_ptr<X> const& x, remote_ptr<Y> const& y)
-{
- return x.address() > y.address();
-}
-
-template<class X, class Y>
-bool operator>=(remote_ptr<X> const& x, remote_ptr<Y> const& y)
-{
- return x.address() >= y.address();
-}
-
-template<class X, class Y>
-bool operator<=(remote_ptr<X> const& x, remote_ptr<Y> const& y)
-{
- return x.address() <= y.address();
-}
-
-template<class X, class Y>
-bool operator==(remote_ptr<X> const& x, remote_ptr<Y> const& y)
-{
- return x.address() == y.address();
-}
-
-template<class X, class Y>
-bool operator!=(remote_ptr<X> const& x, remote_ptr<Y> const& y)
-{
- return x.address() != y.address();
-}
-
-template<class T> inline
-remote_ptr<T> remote(T *p)
-{
- return remote_ptr<T>(p);
-}
-
-template<class T=void> inline
-remote_ptr<T> remote(uint64_t p)
-{
- return remote_ptr<T>(p);
-}
-
-/** Process index used when no process is available
- *
- * The expected behaviour is that if a process index is needed it will fail.
+ * The expected behavior is that if a process index is needed it will fail.
* */
const int ProcessIndexMissing = -1;
-/** Process index used when we don't care about the process index
+/** Process index used when we don't care about the process index (SMPI privatization)
* */
const int ProcessIndexDisabled = -2;
-/** Constant used when any process will do.
+/** Constant used when any process will do (SMPI privatization)
*
- * This is is index of the first process.
+ * Note: This is is index of the first process.
*/
const int ProcessIndexAny = 0;
* * the current state of an existing process;
*
* * a snapshot.
+ *
+ * In order to support SMPI privatization, the can read the memory from the
+ * context of a given SMPI process: if specified, the code reads data from the
+ * correct SMPI privatization VMA.
*/
class AddressSpace {
private:
Process* process_;
public:
AddressSpace(Process* process) : process_(process) {}
- virtual ~AddressSpace();
+ virtual ~AddressSpace() = default;
+ /** The process of this addres space
+ *
+ * This is where we can get debug informations, memory layout, etc.
+ */
simgrid::mc::Process* process() const { return process_; }
/** Read data from the address space
*
* @param buffer target buffer for the data
- * @param size number of bytes
+ * @param size number of bytes to read
* @param address remote source address of the data
* @param process_index which process (used for SMPI privatization)
* @param options
*/
virtual const void* read_bytes(void* buffer, std::size_t size,
- remote_ptr<void> address, int process_index = ProcessIndexAny,
+ RemotePtr<void> address, int process_index = ProcessIndexAny,
ReadOptions options = ReadOptions::none()) const = 0;
/** Read a given data structure from the address space */
template<class T> inline
- void read(T *buffer, remote_ptr<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);
}
- /** Read a given data structure from the address space */
template<class T> inline
- T read(remote_ptr<T> ptr, int process_index = ProcessIndexMissing)
+ void read(Remote<T>& buffer, RemotePtr<T> ptr, int process_index = ProcessIndexAny) const
{
- static_assert(std::is_trivial<T>::value, "Cannot read a non-trivial type");
- T res;
- return *(T*)this->read_bytes(&res, sizeof(T), ptr, process_index);
+ this->read_bytes(buffer.getBuffer(), sizeof(T), ptr, process_index);
}
+
+ /** Read a given data structure from the addres space
+ *
+ * This version returns by value.
+ */
+ template<class T> inline
+ 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;
+ }
+
+ /** Read a string of known size */
+ std::string read_string(RemotePtr<char> address, std::size_t len) const
+ {
+ std::string res;
+ res.resize(len);
+ this->read_bytes(&res[0], len, address);
+ return res;
+ }
+
};
}