-/* Copyright (c) 2008-2020. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2008-2021. 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 "xbt/automaton.hpp"
#include "xbt/system_error.hpp"
+#include <array>
#include <sys/ptrace.h>
#include <sys/wait.h>
void ModelChecker::start()
{
- checker_side_.start(
- [](evutil_socket_t sig, short events, void* arg) { ((ModelChecker*)arg)->handle_events(sig, events); });
+ checker_side_.start([](evutil_socket_t sig, short events, void* arg) {
+ auto mc = static_cast<simgrid::mc::ModelChecker*>(arg);
+ if (events == EV_READ) {
+ std::array<char, MC_MESSAGE_LENGTH> buffer;
+ ssize_t size = mc->checker_side_.get_channel().receive(buffer.data(), buffer.size(), false);
+ if (size == -1 && errno != EAGAIN)
+ throw simgrid::xbt::errno_error();
+
+ if (not mc->handle_message(buffer.data(), size))
+ mc->checker_side_.break_loop();
+ } else if (events == EV_SIGNAL) {
+ if (sig == SIGCHLD)
+ mc->handle_waitpid();
+ } else {
+ xbt_die("Unexpected event");
+ }
+ });
XBT_DEBUG("Waiting for the model-checked process");
int status;
#endif
}
-static const std::pair<const char*, const char*> ignored_local_variables[] = {
- std::pair<const char*, const char*>{ "e", "*" },
- std::pair<const char*, const char*>{ "_log_ev", "*" },
+static constexpr auto ignored_local_variables = {
+ std::make_pair("e", "*"),
+ std::make_pair("_log_ev", "*"),
- /* Ignore local variable about time used for tracing */
- std::pair<const char*, const char*>{ "start_time", "*" },
+ /* Ignore local variable about time used for tracing */
+ std::make_pair("start_time", "*"),
};
void ModelChecker::setup_ignore()
{
- RemoteSimulation& process = this->get_remote_simulation();
- for (std::pair<const char*, const char*> const& var :
- ignored_local_variables)
+ const RemoteSimulation& process = this->get_remote_simulation();
+ for (auto const& var : ignored_local_variables)
process.ignore_local_variable(var.first, var.second);
/* Static variable used for tracing */
void ModelChecker::shutdown()
{
- XBT_DEBUG("Shuting down model-checker");
+ XBT_DEBUG("Shutting down model-checker");
RemoteSimulation* process = &this->get_remote_simulation();
if (process->running()) {
void ModelChecker::resume(RemoteSimulation& process)
{
- int res = checker_side_.get_channel().send(MC_MESSAGE_CONTINUE);
+ int res = checker_side_.get_channel().send(MessageType::CONTINUE);
if (res)
throw xbt::errno_error();
process.clear_cache();
memcpy(&base_message, buffer, sizeof(base_message));
switch(base_message.type) {
- case MC_MESSAGE_IGNORE_HEAP:
- {
- s_mc_message_ignore_heap_t message;
- xbt_assert(size == sizeof(message), "Broken messsage");
- memcpy(&message, buffer, sizeof(message));
-
- IgnoredHeapRegion region;
- region.block = message.block;
- region.fragment = message.fragment;
- region.address = message.address;
- region.size = message.size;
- get_remote_simulation().ignore_heap(region);
- break;
+ case MessageType::IGNORE_HEAP: {
+ s_mc_message_ignore_heap_t message;
+ xbt_assert(size == sizeof(message), "Broken message");
+ memcpy(&message, buffer, sizeof(message));
+
+ IgnoredHeapRegion region;
+ region.block = message.block;
+ region.fragment = message.fragment;
+ region.address = message.address;
+ region.size = message.size;
+ get_remote_simulation().ignore_heap(region);
+ break;
}
- case MC_MESSAGE_UNIGNORE_HEAP:
- {
- s_mc_message_ignore_memory_t message;
- xbt_assert(size == sizeof(message), "Broken messsage");
- memcpy(&message, buffer, sizeof(message));
- get_remote_simulation().unignore_heap((void*)(std::uintptr_t)message.addr, message.size);
- break;
+ case MessageType::UNIGNORE_HEAP: {
+ s_mc_message_ignore_memory_t message;
+ xbt_assert(size == sizeof(message), "Broken message");
+ memcpy(&message, buffer, sizeof(message));
+ get_remote_simulation().unignore_heap((void*)(std::uintptr_t)message.addr, message.size);
+ break;
}
- case MC_MESSAGE_IGNORE_MEMORY:
- {
- s_mc_message_ignore_memory_t message;
- xbt_assert(size == sizeof(message), "Broken messsage");
- memcpy(&message, buffer, sizeof(message));
- this->get_remote_simulation().ignore_region(message.addr, message.size);
- break;
+ case MessageType::IGNORE_MEMORY: {
+ s_mc_message_ignore_memory_t message;
+ xbt_assert(size == sizeof(message), "Broken message");
+ memcpy(&message, buffer, sizeof(message));
+ this->get_remote_simulation().ignore_region(message.addr, message.size);
+ break;
}
- case MC_MESSAGE_STACK_REGION:
- {
- s_mc_message_stack_region_t message;
- xbt_assert(size == sizeof(message), "Broken messsage");
- memcpy(&message, buffer, sizeof(message));
- this->get_remote_simulation().stack_areas().push_back(message.stack_region);
- }
- break;
-
- case MC_MESSAGE_REGISTER_SYMBOL:
- {
- s_mc_message_register_symbol_t message;
- xbt_assert(size == sizeof(message), "Broken message");
- memcpy(&message, buffer, sizeof(message));
- xbt_assert(not message.callback, "Support for client-side function proposition is not implemented.");
- XBT_DEBUG("Received symbol: %s", message.name);
-
- if (property_automaton == nullptr)
- property_automaton = xbt_automaton_new();
-
- RemoteSimulation* process = &this->get_remote_simulation();
- RemotePtr<int> address = remote((int*)message.data);
- xbt::add_proposition(property_automaton, message.name, [process, address]() { return process->read(address); });
-
- break;
+ case MessageType::STACK_REGION: {
+ s_mc_message_stack_region_t message;
+ xbt_assert(size == sizeof(message), "Broken message");
+ memcpy(&message, buffer, sizeof(message));
+ this->get_remote_simulation().stack_areas().push_back(message.stack_region);
+ } break;
+
+ case MessageType::REGISTER_SYMBOL: {
+ s_mc_message_register_symbol_t message;
+ xbt_assert(size == sizeof(message), "Broken message");
+ memcpy(&message, buffer, sizeof(message));
+ xbt_assert(not message.callback, "Support for client-side function proposition is not implemented.");
+ XBT_DEBUG("Received symbol: %s", message.name.data());
+
+ if (property_automaton == nullptr)
+ property_automaton = xbt_automaton_new();
+
+ const RemoteSimulation* process = &this->get_remote_simulation();
+ RemotePtr<int> address = remote((int*)message.data);
+ xbt::add_proposition(property_automaton, message.name.data(),
+ [process, address]() { return process->read(address); });
+
+ break;
}
- case MC_MESSAGE_WAITING:
- return false;
+ case MessageType::WAITING:
+ return false;
- case MC_MESSAGE_ASSERTION_FAILED:
- MC_report_assertion_error();
- this->exit(SIMGRID_MC_EXIT_SAFETY);
+ case MessageType::ASSERTION_FAILED:
+ MC_report_assertion_error();
+ this->exit(SIMGRID_MC_EXIT_SAFETY);
- default:
- xbt_die("Unexpected message from model-checked application");
+ default:
+ xbt_die("Unexpected message from model-checked application");
}
return true;
}
::exit(status);
}
-void ModelChecker::handle_events(int sig, short events)
-{
- if (events == EV_READ) {
- char buffer[MC_MESSAGE_LENGTH];
- ssize_t size = checker_side_.get_channel().receive(buffer, sizeof(buffer), false);
- if (size == -1 && errno != EAGAIN)
- throw simgrid::xbt::errno_error();
-
- if (not handle_message(buffer, size))
- checker_side_.break_loop();
- }
- else if (events == EV_SIGNAL) {
- if (sig == SIGCHLD)
- this->handle_waitpid();
- }
- else {
- xbt_die("Unexpected event");
- }
-}
-
void ModelChecker::handle_waitpid()
{
XBT_DEBUG("Check for wait event");
#ifdef __linux__
ptrace(PTRACE_CONT, remote_simulation_->pid(), 0, WSTOPSIG(status));
#elif defined BSD
- ptrace(PT_CONTINUE, app_remote_mem_.pid(), (caddr_t)1, WSTOPSIG(status));
+ ptrace(PT_CONTINUE, remote_simulation_->pid(), (caddr_t)1, WSTOPSIG(status));
#endif
xbt_assert(errno == 0, "Could not PTRACE_CONT");
}
{
s_mc_message_simcall_handle_t m;
memset(&m, 0, sizeof(m));
- m.type = MC_MESSAGE_SIMCALL_HANDLE;
+ m.type = MessageType::SIMCALL_HANDLE;
m.pid = transition.pid_;
m.value = transition.argument_;
checker_side_.get_channel().send(m);
bool ModelChecker::checkDeadlock()
{
- int res = checker_side_.get_channel().send(MC_MESSAGE_DEADLOCK_CHECK);
+ int res = checker_side_.get_channel().send(MessageType::DEADLOCK_CHECK);
xbt_assert(res == 0, "Could not check deadlock state");
s_mc_message_int_t message;
ssize_t s = checker_side_.get_channel().receive(message);
xbt_assert(s != -1, "Could not receive message");
- xbt_assert(s == sizeof(message) && message.type == MC_MESSAGE_DEADLOCK_CHECK_REPLY,
+ xbt_assert(s == sizeof(message) && message.type == MessageType::DEADLOCK_CHECK_REPLY,
"Received unexpected message %s (%i, size=%i) "
- "expected MC_MESSAGE_DEADLOCK_CHECK_REPLY (%i, size=%i)",
- MC_message_type_name(message.type), (int)message.type, (int)s, (int)MC_MESSAGE_DEADLOCK_CHECK_REPLY,
+ "expected MessageType::DEADLOCK_CHECK_REPLY (%i, size=%i)",
+ MC_message_type_name(message.type), (int)message.type, (int)s, (int)MessageType::DEADLOCK_CHECK_REPLY,
(int)sizeof(message));
return message.value != 0;
}
