X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/343fc4d5b604a63b16ec7d463a3d897237da8a46..4bcfd40036f842e976d329cd0cee7349b8e0f4d6:/src/mc/AddressSpace.hpp diff --git a/src/mc/AddressSpace.hpp b/src/mc/AddressSpace.hpp index ea260c2274..a7658e6a8f 100644 --- a/src/mc/AddressSpace.hpp +++ b/src/mc/AddressSpace.hpp @@ -1,5 +1,4 @@ -/* Copyright (c) 2008-2014. The SimGrid Team. - * All rights reserved. */ +/* Copyright (c) 2008-2019. The SimGrid Team. All rights reserved. */ /* This program is free software; you can redistribute it and/or modify it * under the terms of the license (GNU LGPL) which comes with this package. */ @@ -7,153 +6,157 @@ #ifndef SIMGRID_MC_ADDRESS_SPACE_H #define SIMGRID_MC_ADDRESS_SPACE_H -#include -#include +#include "src/mc/mc_forward.hpp" +#include "src/mc/remote/RemotePtr.hpp" -#include +namespace simgrid { +namespace mc { -#include +/** Process index used when no process is available (SMPI privatization) + * + * The expected behavior is that if a process index is needed it will fail. + * */ +const int ProcessIndexMissing = -1; -#include "mc_forward.h" +/** Process index used when we don't care about the process index (SMPI privatization) + * */ +const int ProcessIndexDisabled = -2; -namespace simgrid { -namespace mc { +/** Constant used when any process will do (SMPI privatization) + * + * Note: This is is index of the first process. + */ +const int ProcessIndexAny = 0; -/** Pointer to a remote address-space (process, snapshot) +/** Options for read operations * - * With this we can clearly identify the expected type of an address in the - * remote process whild avoiding to use native local pointers. + * This is a set of flags managed with bitwise operators. Only the + * meaningful operations are defined: addition, conversions to/from + * integers are not allowed. */ -template class remote_ptr { - std::uint64_t address_; +class ReadOptions { + std::uint32_t value_; + constexpr explicit ReadOptions(std::uint32_t value) : value_(value) {} 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 + constexpr ReadOptions() : value_(0) {} + + explicit constexpr operator bool() const { return value_ != 0; } + constexpr bool operator!() const { return value_ == 0; } + + constexpr ReadOptions operator|(ReadOptions const& that) const { - return address_; + return ReadOptions(value_ | that.value_); } - bool operator!() const + constexpr ReadOptions operator&(ReadOptions const& that) const { - return !address_; + return ReadOptions(value_ & that.value_); } - operator remote_ptr() const + constexpr ReadOptions operator^(ReadOptions const& that) const { - return remote_ptr(address_); + return ReadOptions(value_ ^ that.value_); } - remote_ptr operator+(std::uint64_t n) const + constexpr ReadOptions operator~() const { - return remote_ptr(address_ + n * sizeof(T)); + return ReadOptions(~value_); } - remote_ptr operator-(std::uint64_t n) const + + ReadOptions& operator|=(ReadOptions const& that) { - return remote_ptr(address_ - n * sizeof(T)); + value_ |= that.value_; + return *this; } - remote_ptr& operator+=(std::uint64_t n) const + ReadOptions& operator&=(ReadOptions const& that) { - address_ += n * sizeof(T); + value_ &= that.value_; return *this; } - remote_ptr& operator-=(std::uint64_t n) const + ReadOptions& operator^=(ReadOptions const& that) { - address_ -= n * sizeof(T); + value_ &= that.value_; return *this; } -}; -template -bool operator<(remote_ptr const& x, remote_ptr const& y) -{ - return x.address() < y.address(); -} - -template -bool operator>(remote_ptr const& x, remote_ptr const& y) -{ - return x.address() > y.address(); -} - -template -bool operator>=(remote_ptr const& x, remote_ptr const& y) -{ - return x.address() >= y.address(); -} - -template -bool operator<=(remote_ptr const& x, remote_ptr const& y) -{ - return x.address() <= y.address(); -} - -template -bool operator==(remote_ptr const& x, remote_ptr const& y) -{ - return x.address() == y.address(); -} + /** Copy the data to the given buffer */ + static constexpr ReadOptions none() { return ReadOptions(0); } -template -bool operator!=(remote_ptr const& x, remote_ptr const& y) -{ - return x.address() != y.address(); -} - -template inline -remote_ptr remote(T *p) -{ - return remote_ptr(p); -} - -template inline -remote_ptr remote(uint64_t p) -{ - return remote_ptr(p); -} + /** Allows to return a pointer to another buffer where the data is + * available instead of copying the data into the buffer + */ + static constexpr ReadOptions lazy() { return ReadOptions(1); } +}; -/** Process index used when no process is available +/** A given state of a given process (abstract base class) * - * The expected behaviour 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 - * */ -const int ProcessIndexDisabled = -2; - -/** Constant used when any process will do. + * Currently, this might either be: + * + * * the current state of an existing process; * - * This is is index of the first 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. */ -const int ProcessIndexAny = 0; - class AddressSpace { +private: + RemoteClient* process_; + public: - enum ReadMode { - Normal, - /** Allows the `read_bytes` to return a pointer to another buffer - * where the data ins available instead of copying the data into the buffer - */ - Lazy - }; - virtual ~AddressSpace(); + explicit AddressSpace(RemoteClient* process) : process_(process) {} + virtual ~AddressSpace() = default; + + /** The process of this address space + * + * This is where we can get debug informations, memory layout, etc. + */ + simgrid::mc::RemoteClient* process() const { return process_; } + + /** Read data from the address space + * + * @param buffer target buffer for the data + * @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 address, int process_index = ProcessIndexAny, - ReadMode mode = Normal) const = 0; + RemotePtr address, int process_index = ProcessIndexAny, + ReadOptions options = ReadOptions::none()) const = 0; + /** Read a given data structure from the address space */ template inline - void read(T *buffer, remote_ptr ptr, int process_index = ProcessIndexAny) + void read(T *buffer, RemotePtr ptr, int process_index = ProcessIndexAny) const { this->read_bytes(buffer, sizeof(T), ptr, process_index); } template inline - T read(remote_ptr ptr, int process_index = ProcessIndexMissing) + void read(Remote& buffer, RemotePtr ptr, int process_index = ProcessIndexAny) const + { + 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 inline + Remote read(RemotePtr ptr, int process_index = ProcessIndexMissing) const + { + Remote res; + this->read_bytes(&res, sizeof(T), ptr, process_index); + return res; + } + + /** Read a string of known size */ + std::string read_string(RemotePtr address, std::size_t len) const { - static_assert(std::is_trivial::value, "Cannot read a non-trivial type"); - T res; - return *(T*)this->read_bytes(&res, sizeof(T), ptr, process_index); + std::string res; + res.resize(len); + this->read_bytes(&res[0], len, address); + return res; } + }; }