+++ /dev/null
-/* Copyright (c) 2015. 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. */
-
-#include <cstdlib>
-#include <cerrno>
-
-#include <sys/types.h>
-#include <sys/ptrace.h>
-#include <sys/socket.h>
-
-#include <xbt/log.h>
-#include <xbt/sysdep.h>
-#include <xbt/mmalloc.h>
-#include <xbt/swag.h>
-
-#include <simgrid/modelchecker.h>
-
-#include "src/internal_config.h"
-
-#include "src/mc/mc_protocol.h"
-#include "src/mc/Client.hpp"
-#include "src/mc/mc_request.h"
-
-// We won't need those once the separation MCer/MCed is complete:
-#include "src/mc/mc_ignore.h"
-#include "src/mc/mc_smx.h"
-
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_client, mc, "MC client logic");
-
-namespace simgrid {
-namespace mc {
-
-std::unique_ptr<Client> Client::client_;
-
-Client* Client::initialize()
-{
- // We are not in MC mode:
- // TODO, handle this more gracefully.
- if (!getenv(MC_ENV_SOCKET_FD))
- return nullptr;
-
- // Do not break if we are called multiple times:
- if (client_)
- return client_.get();
-
- _sg_do_model_check = 1;
-
- // Fetch socket from MC_ENV_SOCKET_FD:
- char* fd_env = std::getenv(MC_ENV_SOCKET_FD);
- if (!fd_env)
- xbt_die("No MC socket passed in the environment");
- int fd = xbt_str_parse_int(fd_env, bprintf("Variable %s should contain a number but contains '%%s'", MC_ENV_SOCKET_FD));
- XBT_DEBUG("Model-checked application found socket FD %i", fd);
-
- // Check the socket type/validity:
- int type;
- socklen_t socklen = sizeof(type);
- if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &type, &socklen) != 0)
- xbt_die("Could not check socket type");
- if (type != SOCK_DGRAM)
- xbt_die("Unexpected socket type %i", type);
- XBT_DEBUG("Model-checked application found expected socket type");
-
- client_ = std::unique_ptr<Client>(new simgrid::mc::Client(fd));
-
- // Wait for the model-checker:
- errno = 0;
-#if defined __linux__
- ptrace(PTRACE_TRACEME, 0, nullptr, nullptr);
-#elif defined BSD
- ptrace(PT_TRACE_ME, 0, nullptr, 0);
-#else
-# error "no ptrace equivalent coded for this platform"
-#endif
- if(errno != 0 || raise(SIGSTOP) != 0)
- xbt_die("Could not wait for the model-checker");
-
- client_->handleMessages();
- return client_.get();
-}
-
-void Client::handleMessages()
-{
- while (1) {
- XBT_DEBUG("Waiting messages from model-checker");
-
- char message_buffer[MC_MESSAGE_LENGTH];
- ssize_t s;
-
- if ((s = channel_.receive(&message_buffer, sizeof(message_buffer))) < 0)
- xbt_die("Could not receive commands from the model-checker");
-
- s_mc_message_t message;
- if ((size_t) s < sizeof(message))
- xbt_die("Received message is too small");
- memcpy(&message, message_buffer, sizeof(message));
- switch (message.type) {
-
- case MC_MESSAGE_DEADLOCK_CHECK:
- {
- // Check deadlock:
- bool deadlock = false;
- smx_actor_t actor;
- if (xbt_swag_size(simix_global->process_list)) {
- deadlock = true;
- xbt_swag_foreach(actor, simix_global->process_list) if (simgrid::mc::actor_is_enabled(actor))
- {
- deadlock = false;
- break;
- }
- }
-
- // Send result:
- s_mc_int_message_t answer;
- answer.type = MC_MESSAGE_DEADLOCK_CHECK_REPLY;
- answer.value = deadlock;
- if (channel_.send(answer))
- xbt_die("Could not send response");
- }
- break;
-
- case MC_MESSAGE_CONTINUE:
- return;
-
- case MC_MESSAGE_SIMCALL_HANDLE:
- {
- s_mc_simcall_handle_message_t message;
- if (s != sizeof(message))
- xbt_die("Unexpected size for SIMCALL_HANDLE");
- memcpy(&message, message_buffer, sizeof(message));
- smx_actor_t process = SIMIX_process_from_PID(message.pid);
- if (!process)
- xbt_die("Invalid pid %lu", (unsigned long) message.pid);
- SIMIX_simcall_handle(&process->simcall, message.value);
- if (channel_.send(MC_MESSAGE_WAITING))
- xbt_die("Could not send MESSAGE_WAITING to model-checker");
- }
- break;
-
- case MC_MESSAGE_RESTORE:
- {
- s_mc_restore_message_t message;
- if (s != sizeof(message))
- xbt_die("Unexpected size for SIMCALL_HANDLE");
- memcpy(&message, message_buffer, sizeof(message));
-#if HAVE_SMPI
- smpi_really_switch_data_segment(message.index);
-#endif
- }
- break;
-
- default:
- xbt_die("Received unexpected message %s (%i)",
- MC_message_type_name(message.type),
- message.type
- );
- }
- }
-}
-
-void Client::mainLoop(void)
-{
- while (1) {
- simgrid::mc::wait_for_requests();
- if (channel_.send(MC_MESSAGE_WAITING))
- xbt_die("Could not send WAITING mesage to model-checker");
- this->handleMessages();
- }
-}
-
-void Client::reportAssertionFailure(const char* description)
-{
- if (channel_.send(MC_MESSAGE_ASSERTION_FAILED))
- xbt_die("Could not send assertion to model-checker");
- this->handleMessages();
-}
-
-void Client::ignoreMemory(void* addr, std::size_t size)
-{
- s_mc_ignore_memory_message_t message;
- message.type = MC_MESSAGE_IGNORE_MEMORY;
- message.addr = (std::uintptr_t) addr;
- message.size = size;
- if (channel_.send(message))
- xbt_die("Could not send IGNORE_MEMORY mesage to model-checker");
-}
-
-void Client::ignoreHeap(void* address, std::size_t size)
-{
- xbt_mheap_t heap = mmalloc_get_current_heap();
-
- s_mc_ignore_heap_message_t message;
- message.type = MC_MESSAGE_IGNORE_HEAP;
- message.address = address;
- message.size = size;
- message.block =
- ((char *) address -
- (char *) heap->heapbase) / BLOCKSIZE + 1;
- if (heap->heapinfo[message.block].type == 0) {
- message.fragment = -1;
- heap->heapinfo[message.block].busy_block.ignore++;
- } else {
- message.fragment =
- ((uintptr_t) (ADDR2UINT(address) % (BLOCKSIZE))) >>
- heap->heapinfo[message.block].type;
- heap->heapinfo[message.block].busy_frag.ignore[message.fragment]++;
- }
-
- if (channel_.send(message))
- xbt_die("Could not send ignored region to MCer");
-}
-
-void Client::unignoreHeap(void* address, std::size_t size)
-{
- s_mc_ignore_memory_message_t message;
- message.type = MC_MESSAGE_UNIGNORE_HEAP;
- message.addr = (std::uintptr_t) address;
- message.size = size;
- if (channel_.send(message))
- xbt_die("Could not send IGNORE_HEAP mesasge to model-checker");
-}
-
-void Client::declareSymbol(const char *name, int* value)
-{
- s_mc_register_symbol_message_t message;
- message.type = MC_MESSAGE_REGISTER_SYMBOL;
- if (strlen(name) + 1 > sizeof(message.name))
- xbt_die("Symbol is too long");
- strncpy(message.name, name, sizeof(message.name));
- message.callback = nullptr;
- message.data = value;
- if (channel_.send(message))
- xbt_die("Could send REGISTER_SYMBOL message to model-checker");
-}
-
-void Client::declareStack(void *stack, size_t size, smx_actor_t process, ucontext_t* context)
-{
- xbt_mheap_t heap = mmalloc_get_current_heap();
-
- s_stack_region_t region;
- memset(®ion, 0, sizeof(region));
- region.address = stack;
- region.context = context;
- region.size = size;
- region.block =
- ((char *) stack -
- (char *) heap->heapbase) / BLOCKSIZE + 1;
-#if HAVE_SMPI
- if (smpi_privatize_global_variables && process)
- region.process_index = smpi_process_index_of_smx_process(process);
- else
-#endif
- region.process_index = -1;
-
- s_mc_stack_region_message_t message;
- message.type = MC_MESSAGE_STACK_REGION;
- message.stack_region = region;
- if (channel_.send(message))
- xbt_die("Coule not send STACK_REGION to model-checker");
-}
-
-}
-}
