1 /* Copyright (c) 2016-2023. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #include "src/mc/explo/Exploration.hpp"
7 #include "src/mc/mc_config.hpp"
8 #include "src/mc/mc_environ.h"
9 #include "src/mc/mc_exit.hpp"
10 #include "src/mc/mc_private.hpp"
11 #include "xbt/string.hpp"
15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_explo, mc, "Generic exploration algorithm of the model-checker");
17 namespace simgrid::mc {
19 static simgrid::config::Flag<std::string> cfg_dot_output_file{
20 "model-check/dot-output", "Name of dot output file corresponding to graph state", ""};
22 Exploration* Exploration::instance_ = nullptr; // singleton instance
24 Exploration::Exploration(const std::vector<char*>& args) : remote_app_(std::make_unique<RemoteApp>(args))
26 xbt_assert(instance_ == nullptr, "Cannot have more than one exploration instance");
29 if (not cfg_dot_output_file.get().empty()) {
30 dot_output_ = fopen(cfg_dot_output_file.get().c_str(), "w");
31 xbt_assert(dot_output_ != nullptr, "Error open dot output file: %s", strerror(errno));
33 fprintf(dot_output_, "digraph graphname{\n fixedsize=true; rankdir=TB; ranksep=.25; edge [fontsize=12]; node "
34 "[fontsize=10, shape=circle,width=.5 ]; graph [resolution=20, fontsize=10];\n");
38 Exploration::~Exploration()
40 if (dot_output_ != nullptr)
45 void Exploration::dot_output(const char* fmt, ...)
47 if (dot_output_ != nullptr) {
50 vfprintf(dot_output_, fmt, ap);
56 void Exploration::log_state()
58 if (not cfg_dot_output_file.get().empty()) {
62 if (getenv(MC_ENV_SYSTEM_STATISTICS)) {
63 int ret = system("free");
65 XBT_WARN("Call to system(free) did not return 0, but %d", ret);
68 // Make our tests fully reproducible despite the subtle differences of strsignal() across archs
69 static const char* signal_name(int status)
71 switch (WTERMSIG(status)) {
72 case SIGABRT: // FreeBSD uses "Abort trap" as a strsignal for SIGABRT
74 case SIGSEGV: // MacOSX uses "Segmentation fault: 11" for SIGKILL
75 return "Segmentation fault";
77 return strsignal(WTERMSIG(status));
81 std::vector<std::string> Exploration::get_textual_trace(int max_elements)
83 std::vector<std::string> trace;
84 for (auto const& transition : get_record_trace()) {
85 auto const& call_location = transition->get_call_location();
86 if (not call_location.empty())
87 trace.push_back(xbt::string_printf("Actor %ld in %s ==> simcall: %s", transition->aid_, call_location.c_str(),
88 transition->to_string().c_str()));
90 trace.push_back(xbt::string_printf("Actor %ld in simcall %s", transition->aid_, transition->to_string().c_str()));
92 if (max_elements == 0)
98 XBT_ATTRIB_NORETURN void Exploration::report_crash(int status)
100 XBT_INFO("**************************");
101 XBT_INFO("** CRASH IN THE PROGRAM **");
102 XBT_INFO("**************************");
103 if (WIFSIGNALED(status))
104 XBT_INFO("From signal: %s", signal_name(status));
105 else if (WIFEXITED(status))
106 XBT_INFO("From exit: %i", WEXITSTATUS(status));
107 if (not xbt_log_no_loc)
108 XBT_INFO("%s core dump was generated by the system.", WCOREDUMP(status) ? "A" : "No");
110 XBT_INFO("Counter-example execution trace:");
111 for (auto const& s : get_textual_trace())
112 XBT_INFO(" %s", s.c_str());
113 XBT_INFO("You can debug the problem (and see the whole details) by rerunning out of simgrid-mc with "
114 "--cfg=model-check/replay:'%s'",
115 get_record_trace().to_string().c_str());
118 throw McError(ExitStatus::PROGRAM_CRASH);
120 XBT_ATTRIB_NORETURN void Exploration::report_assertion_failure()
122 XBT_INFO("**************************");
123 XBT_INFO("*** PROPERTY NOT VALID ***");
124 XBT_INFO("**************************");
125 XBT_INFO("Counter-example execution trace:");
126 for (auto const& s : get_textual_trace())
127 XBT_INFO(" %s", s.c_str());
128 XBT_INFO("You can debug the problem (and see the whole details) by rerunning out of simgrid-mc with "
129 "--cfg=model-check/replay:'%s'",
130 get_record_trace().to_string().c_str());
132 throw McError(ExitStatus::SAFETY);
135 }; // namespace simgrid::mc