/* mc::RemoteClient: representative of the Client memory on the MC side */
-/* Copyright (c) 2008-2021. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2008-2023. 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. */
#ifndef SIMGRID_MC_PROCESS_H
#define SIMGRID_MC_PROCESS_H
-#include "mc/datatypes.h"
#include "src/mc/AddressSpace.hpp"
+#include "src/mc/datatypes.h"
#include "src/mc/inspect/ObjectInformation.hpp"
#include "src/mc/remote/RemotePtr.hpp"
+#include "src/xbt/memory_map.hpp"
#include "src/xbt/mmalloc/mmprivate.h"
+#include <libunwind.h>
#include <vector>
-namespace simgrid {
-namespace mc {
+namespace simgrid::mc {
class ActorInformation {
public:
Remote<kernel::actor::ActorImpl> copy;
/** Hostname (owned by `mc_model_checker->hostnames_`) */
- const xbt::string* hostname = nullptr;
+ const std::string* hostname = nullptr;
std::string name;
void clear()
std::size_t size;
};
-/** The Application's process memory, seen from the MCer perspective
- *
- * This class is mixing a lot of different responsibilities and is tied
- * to SIMIX. It should probably be split into different classes.
+/** The Application's process memory, seen from the Checker perspective
*
* Responsibilities:
*
* - reading from the process memory (`AddressSpace`);
* - accessing the system state of the process (heap, …);
- * - storing the SIMIX state of the process;
* - privatization;
* - stack unwinding;
* - etc.
static constexpr int cache_none = 0;
static constexpr int cache_heap = 1;
static constexpr int cache_malloc = 2;
- static constexpr int cache_simix_processes = 4;
public:
explicit RemoteProcess(pid_t pid);
~RemoteProcess() override;
- void init();
+ void init(xbt_mheap_t mmalloc_default_mdp, unsigned long* maxpid);
RemoteProcess(RemoteProcess const&) = delete;
RemoteProcess(RemoteProcess&&) = delete;
RemoteProcess& operator=(RemoteProcess const&) = delete;
RemoteProcess& operator=(RemoteProcess&&) = delete;
+ /* ************* */
+ /* Low-level API */
+ /* ************* */
+
// Read memory:
void* read_bytes(void* buffer, std::size_t size, RemotePtr<void> address,
ReadOptions options = ReadOptions::none()) const override;
this->refresh_malloc_info();
return this->heap_info.data();
}
+ /* Get the amount of memory mallocated in the remote process (requires mmalloc) */
+ std::size_t get_remote_heap_bytes();
void clear_cache() { this->cache_flags_ = RemoteProcess::cache_none; }
void unignore_heap(void* address, size_t size);
void ignore_local_variable(const char* var_name, const char* frame_name) const;
- std::vector<ActorInformation>& actors();
- std::vector<ActorInformation>& dead_actors();
- /** Get a local description of a remote SIMIX actor */
- ActorInformation* resolve_actor_info(RemotePtr<kernel::actor::ActorImpl> actor)
- {
- xbt_assert(mc_model_checker != nullptr);
- if (not actor)
- return nullptr;
- this->refresh_simix();
- for (auto& actor_info : this->smx_actors_infos)
- if (actor_info.address == actor)
- return &actor_info;
- for (auto& actor_info : this->smx_dead_actors_infos)
- if (actor_info.address == actor)
- return &actor_info;
- return nullptr;
- }
+ /* ***************** */
+ /* SIMIX-related API */
+ /* ***************** */
+private:
+ // Cache the address of the variables we read directly in the memory of remote
+ RemotePtr<unsigned long> maxpid_addr_;
- /** Get a local copy of the SIMIX actor structure */
- kernel::actor::ActorImpl* resolve_actor(RemotePtr<kernel::actor::ActorImpl> process)
- {
- ActorInformation* actor_info = this->resolve_actor_info(process);
- if (actor_info)
- return actor_info->copy.get_buffer();
- else
- return nullptr;
- }
+public:
+ unsigned long get_maxpid() const { return this->read(maxpid_addr_); }
void dump_stack() const;
void init_memory_map_info();
void refresh_heap();
void refresh_malloc_info();
- void refresh_simix();
pid_t pid_ = -1;
bool running_ = false;
std::vector<s_stack_region_t> stack_areas_;
std::vector<IgnoredHeapRegion> ignored_heap_;
+ /** State of the cache (which variables are up to date) */
+ int cache_flags_ = RemoteProcess::cache_none;
+
public:
// object info
// TODO, make private (first, objectify simgrid::mc::ObjectInformation*)
std::vector<std::shared_ptr<ObjectInformation>> object_infos;
std::shared_ptr<ObjectInformation> binary_info;
- // Copies of MCed SMX data structures
- /** Copy of `simix_global->process_list`
- *
- * See mc_smx.c.
- */
- std::vector<ActorInformation> smx_actors_infos;
-
- /** Copy of `simix_global->actors_to_destroy`
- *
- * See mc_smx.c.
- */
- std::vector<ActorInformation> smx_dead_actors_infos;
-
-private:
- /** State of the cache (which variables are up to date) */
- int cache_flags_ = RemoteProcess::cache_none;
-
-public:
/** Address of the heap structure in the MCed process. */
- void* heap_address;
+ RemotePtr<s_xbt_mheap_t> heap_address;
/** Copy of the heap structure of the process
*
* This is not used if the process is the current one:
* use `get_heap_info()` in order to use it.
*/
- std::unique_ptr<s_xbt_mheap_t> heap;
+ std::unique_ptr<s_xbt_mheap_t> heap = std::make_unique<s_xbt_mheap_t>();
/** Copy of the allocation info structure
*
* (with simgrid::mc::Process* / simgrid::mc::AddressSpace*
* and unw_context_t).
*/
- unw_addr_space_t unw_addr_space;
+ unw_addr_space_t unw_addr_space = nullptr;
/** Underlying libunwind address-space
*
* operations of the native MC address space is currently delegated
* to this address space (either the local or a ptrace unwinder).
*/
- unw_addr_space_t unw_underlying_addr_space;
+ unw_addr_space_t unw_underlying_addr_space = nullptr;
/** The corresponding context
*/
- void* unw_underlying_context;
+ void* unw_underlying_context = nullptr;
};
/** Open a FD to a remote process memory (`/dev/$pid/mem`) */
XBT_PRIVATE int open_vm(pid_t pid, int flags);
-} // namespace mc
-} // namespace simgrid
+} // namespace simgrid::mc
#endif
