1 /* Copyright (c) 2010-2019. 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 "simgrid/Exception.hpp"
8 #include "xbt/replay.hpp"
10 #include <boost/algorithm/string.hpp>
12 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(replay,xbt,"Replay trace reader");
17 std::ifstream* action_fs = nullptr;
18 std::unordered_map<std::string, action_fun> action_funs;
19 static std::unordered_map<std::string, std::queue<ReplayAction*>*> action_queues;
21 static void read_and_trim_line(std::ifstream& fs, std::string* line)
24 std::getline(fs, *line);
26 } while (not fs.eof() && (line->length() == 0 || line->front() == '#'));
27 XBT_DEBUG("got from trace: %s", line->c_str());
35 explicit ReplayReader(const char* filename) : fs(filename, std::ifstream::in)
37 XBT_VERB("Prepare to replay file '%s'", filename);
38 xbt_assert(fs.is_open(), "Cannot read replay file '%s'", filename);
40 ReplayReader(const ReplayReader&) = delete;
41 ReplayReader& operator=(const ReplayReader&) = delete;
42 bool get(ReplayAction* action);
45 bool ReplayReader::get(ReplayAction* action)
47 read_and_trim_line(fs, &line);
49 boost::split(*action, line, boost::is_any_of(" \t"), boost::token_compress_on);
53 static ReplayAction* get_action(const char* name)
57 std::queue<ReplayAction*>* myqueue = nullptr;
58 if (action_queues.find(std::string(name)) != action_queues.end())
59 myqueue = action_queues.at(std::string(name));
60 if (myqueue == nullptr || myqueue->empty()) { // Nothing stored for me. Read the file further
61 // Read lines until I reach something for me (which breaks in loop body) or end of file reached
63 std::string action_line;
64 read_and_trim_line(*action_fs, &action_line);
67 /* we cannot split in place here because we parse&store several lines for the colleagues... */
68 action = new ReplayAction();
69 boost::split(*action, action_line, boost::is_any_of(" \t"), boost::token_compress_on);
71 // if it's for me, I'm done
72 std::string evtname = action->front();
73 if (evtname.compare(name) == 0) {
76 // Else, I have to store it for the relevant colleague
77 std::queue<ReplayAction*>* otherqueue = nullptr;
78 auto act = action_queues.find(evtname);
79 if (act != action_queues.end()) {
80 otherqueue = act->second;
81 } else { // Damn. Create the queue of that guy
82 otherqueue = new std::queue<ReplayAction*>();
83 action_queues.insert({evtname, otherqueue});
85 otherqueue->push(action);
88 // end of file reached while searching in vain for more work
90 // Get something from my queue and return it
91 action = myqueue->front();
99 static void handle_action(ReplayAction& action)
101 XBT_DEBUG("%s replays a %s action", action.at(0).c_str(), action.at(1).c_str());
102 action_fun function = action_funs.at(action.at(1));
105 } catch (const Exception& e) {
107 xbt_die("Replay error:\n %s", e.what());
112 * @ingroup XBT_replay
113 * @brief function used internally to actually run the replay
115 int replay_runner(const char* actor_name, const char* trace_filename)
117 std::string actor_name_string(actor_name);
118 if (simgrid::xbt::action_fs) { // <A unique trace file
120 simgrid::xbt::ReplayAction* evt = simgrid::xbt::get_action(actor_name);
123 simgrid::xbt::handle_action(*evt);
126 if (action_queues.find(actor_name_string) != action_queues.end()) {
127 std::queue<ReplayAction*>* myqueue = action_queues.at(actor_name_string);
129 action_queues.erase(actor_name_string);
131 } else { // Should have got my trace file in argument
132 xbt_assert(trace_filename != nullptr);
133 simgrid::xbt::ReplayAction evt;
134 simgrid::xbt::ReplayReader reader(trace_filename);
135 while (reader.get(&evt)) {
136 if (evt.front().compare(actor_name) == 0) {
137 simgrid::xbt::handle_action(evt);
139 XBT_WARN("Ignore trace element not for me (target='%s', I am '%s')", evt.front().c_str(), actor_name);
150 * @ingroup XBT_replay
151 * @brief Registers a function to handle a kind of action
153 * Registers a function to handle a kind of action
154 * This table is then used by @ref simgrid::xbt::replay_runner
156 * The argument of the function is the line describing the action, fields separated by spaces.
158 * @param action_name the reference name of the action.
159 * @param function prototype given by the type: void...(const char** action)
161 void xbt_replay_action_register(const char* action_name, const action_fun& function)
163 simgrid::xbt::action_funs[std::string(action_name)] = function;
167 * @ingroup XBT_replay
168 * @brief Get the function that was previously registered to handle a kind of action
170 * This can be useful if you want to override and extend an existing action.
172 action_fun xbt_replay_action_get(const char* action_name)
174 return simgrid::xbt::action_funs.at(std::string(action_name));