#ifndef __MODEL_H__
#define __MODEL_H__
-#include <list>
-#include <vector>
#include <cstddef>
-#include <ucontext.h>
+#include <inttypes.h>
#include "mymemory.h"
-#include "action.h"
#include "hashtable.h"
-#include "workqueue.h"
#include "config.h"
#include "modeltypes.h"
-
-/* Forward declaration */
-class NodeStack;
-class CycleGraph;
-class Promise;
-class Scheduler;
-class Thread;
-
-/** @brief Shorthand for a list of release sequence heads */
-typedef std::vector< const ModelAction *, ModelAlloc<const ModelAction *> > rel_heads_list_t;
-
-/**
- * Model checker parameter structure. Holds run-time configuration options for
- * the model checker.
- */
-struct model_params {
- int maxreads;
- int maxfuturedelay;
- unsigned int fairwindow;
- unsigned int enabledcount;
- unsigned int bound;
-};
-
-struct PendingFutureValue {
- ModelAction *writer;
- ModelAction * act;
-};
-
-/**
- * Structure for holding small ModelChecker members that should be snapshotted
- */
-struct model_snapshot_members {
- ModelAction *current_action;
- unsigned int next_thread_id;
- modelclock_t used_sequence_numbers;
- Thread *nextThread;
- ModelAction *next_backtrack;
-};
-
-/** @brief Records information regarding a single pending release sequence */
-struct release_seq {
- /** @brief The acquire operation */
- ModelAction *acquire;
- /** @brief The head of the RMW chain from which 'acquire' reads; may be
- * equal to 'release' */
- const ModelAction *rf;
- /** @brief The head of the potential longest release sequence chain */
- const ModelAction *release;
- /** @brief The write(s) that may break the release sequence */
- std::vector<const ModelAction *> writes;
+#include "stl-model.h"
+#include "context.h"
+#include "params.h"
+#include "classlist.h"
+#include "snapshot-interface.h"
+
+/** @brief Model checker execution stats */
+struct execution_stats {
+ int num_total; /**< @brief Total number of executions */
+ int num_buggy_executions; /** @brief Number of buggy executions */
+ int num_complete; /**< @brief Number of feasible, non-buggy, complete executions */
};
/** @brief The central structure for model-checking */
class ModelChecker {
public:
- ModelChecker(struct model_params params);
+ ModelChecker();
~ModelChecker();
+ model_params * getParams();
+
+ /** Exit the model checker, intended for pluggins. */
+ void exit_model_checker();
- /** @returns the context for the main model-checking system thread */
- ucontext_t * get_system_context() { return &system_context; }
+ ModelExecution * get_execution() const { return execution; }
+ ModelHistory * get_history() const { return history; }
- /** Prints an execution summary with trace information. */
- void print_summary();
-#if SUPPORT_MOD_ORDER_DUMP
- void dumpGraph(char *filename);
-#endif
+ int get_execution_number() const { return execution_number; }
- void add_thread(Thread *t);
- void remove_thread(Thread *t);
Thread * get_thread(thread_id_t tid) const;
- Thread * get_thread(ModelAction *act) const;
-
- thread_id_t get_next_id();
- unsigned int get_num_threads();
- Thread * get_current_thread();
-
- int switch_to_master(ModelAction *act);
- ClockVector * get_cv(thread_id_t tid);
- ModelAction * get_parent_action(thread_id_t tid);
- bool next_execution();
- bool isfeasible();
- bool isfeasibleotherthanRMW();
- bool isfinalfeasible();
- void mo_check_promises(thread_id_t tid, const ModelAction *write);
- void check_promises(thread_id_t tid, ClockVector *old_cv, ClockVector * merge_cv);
- void get_release_seq_heads(ModelAction *act, rel_heads_list_t *release_heads);
- void finish_execution();
- bool isfeasibleprefix();
- void set_assert() {asserted=true;}
-
- /** @brief Alert the model-checker that an incorrectly-ordered
- * synchronization was made */
- void set_bad_synchronization() { bad_synchronization = true; }
-
- const model_params params;
- Scheduler * get_scheduler() { return scheduler;}
- Node * get_curr_node();
+ Thread * get_thread(const ModelAction *act) const;
+
+ Thread * get_current_thread() const;
+ thread_id_t get_current_thread_id() const;
+ uint64_t switch_thread(ModelAction *act);
+
+ void assert_bug(const char *msg, ...);
+
+ void assert_user_bug(const char *msg);
+
+ model_params params;
+ void add_trace_analysis(TraceAnalysis *a) { trace_analyses.push_back(a); }
+ void set_inspect_plugin(TraceAnalysis *a) { inspect_plugin=a; }
+ void startChecker();
+ Thread * getInitThread() {return init_thread;}
+ Scheduler * getScheduler() {return scheduler;}
MEMALLOC
private:
+ /** Snapshot id we return to restart. */
+ snapshot_id snapshot;
+
/** The scheduler to use: tracks the running/ready Threads */
- Scheduler *scheduler;
-
- bool sleep_can_read_from(ModelAction * curr, const ModelAction *write);
- bool thin_air_constraint_may_allow(const ModelAction * writer, const ModelAction *reader);
- bool mo_may_allow(const ModelAction * writer, const ModelAction *reader);
- bool has_asserted() {return asserted;}
- void reset_asserted() {asserted=false;}
- int num_executions;
- int num_feasible_executions;
- bool promises_expired();
- void execute_sleep_set();
- void wake_up_sleeping_actions(ModelAction * curr);
- modelclock_t get_next_seq_num();
-
- /**
- * Stores the ModelAction for the current thread action. Call this
- * immediately before switching from user- to system-context to pass
- * data between them.
- * @param act The ModelAction created by the user-thread action
- */
- void set_current_action(ModelAction *act) { priv->current_action = act; }
- Thread * check_current_action(ModelAction *curr);
- bool initialize_curr_action(ModelAction **curr);
- bool process_read(ModelAction *curr, bool second_part_of_rmw);
- bool process_write(ModelAction *curr);
- bool process_mutex(ModelAction *curr);
- bool process_thread_action(ModelAction *curr);
- void process_relseq_fixup(ModelAction *curr, work_queue_t *work_queue);
- bool check_action_enabled(ModelAction *curr);
-
- bool take_step();
-
- void check_recency(ModelAction *curr, const ModelAction *rf);
- ModelAction * get_last_conflict(ModelAction *act);
- void set_backtracking(ModelAction *act);
- Thread * get_next_thread(ModelAction *curr);
- ModelAction * get_next_backtrack();
+ Scheduler * const scheduler;
+ ModelHistory * history;
+ ModelExecution *execution;
+ Thread * init_thread;
+
+ int execution_number;
+
+ unsigned int curr_thread_num;
+ Thread * chosen_thread;
+ bool break_execution;
+
+ void startRunExecution(Thread *old);
+ void finishRunExecution(Thread *old);
+ Thread * getNextThread(Thread *old);
+ bool handleChosenThread(Thread *old);
+
+ modelclock_t checkfree;
+
+ unsigned int get_num_threads() const;
+
+ void finish_execution(bool moreexecutions);
+ bool should_terminate_execution();
+
+ Thread * get_next_thread();
void reset_to_initial_state();
- bool resolve_promises(ModelAction *curr);
- void compute_promises(ModelAction *curr);
- void compute_relseq_breakwrites(ModelAction *curr);
-
- void check_curr_backtracking(ModelAction * curr);
- void add_action_to_lists(ModelAction *act);
- ModelAction * get_last_action(thread_id_t tid) const;
- ModelAction * get_last_seq_cst(ModelAction *curr) const;
- ModelAction * get_last_unlock(ModelAction *curr) const;
- void build_reads_from_past(ModelAction *curr);
- ModelAction * process_rmw(ModelAction *curr);
- void post_r_modification_order(ModelAction *curr, const ModelAction *rf);
- bool r_modification_order(ModelAction *curr, const ModelAction *rf);
- bool w_modification_order(ModelAction *curr);
- bool release_seq_heads(const ModelAction *rf, rel_heads_list_t *release_heads, struct release_seq *pending) const;
- bool resolve_release_sequences(void *location, work_queue_t *work_queue);
-
- ModelAction *diverge;
- ModelAction *earliest_diverge;
-
- ucontext_t system_context;
- action_list_t *action_trace;
- HashTable<int, Thread *, int> *thread_map;
-
- /** Per-object list of actions. Maps an object (i.e., memory location)
- * to a trace of all actions performed on the object. */
- HashTable<const void *, action_list_t, uintptr_t, 4> *obj_map;
-
- /** Per-object list of actions. Maps an object (i.e., memory location)
- * to a trace of all actions performed on the object. */
- HashTable<const void *, action_list_t, uintptr_t, 4> *lock_waiters_map;
-
- /** Per-object list of actions. Maps an object (i.e., memory location)
- * to a trace of all actions performed on the object. */
- HashTable<const void *, action_list_t, uintptr_t, 4> *condvar_waiters_map;
-
- HashTable<void *, std::vector<action_list_t>, uintptr_t, 4 > *obj_thrd_map;
- std::vector< Promise *, SnapshotAlloc<Promise *> > *promises;
- std::vector< struct PendingFutureValue, SnapshotAlloc<struct PendingFutureValue> > *futurevalues;
-
- /**
- * List of pending release sequences. Release sequences might be
- * determined lazily as promises are fulfilled and modification orders
- * are established. Each entry in the list may only be partially
- * filled, depending on its pending status.
- */
- std::vector< struct release_seq *, SnapshotAlloc<struct release_seq *> > *pending_rel_seqs;
-
- std::vector< ModelAction *, SnapshotAlloc<ModelAction *> > *thrd_last_action;
- NodeStack *node_stack;
-
- /** Private data members that should be snapshotted. They are grouped
- * together for efficiency and maintainability. */
- struct model_snapshot_members *priv;
-
- /** A special model-checker Thread; used for associating with
- * model-checker-related ModelAcitons */
- Thread *model_thread;
-
- /**
- * @brief The modification order graph
- *
- * A directed acyclic graph recording observations of the modification
- * order on all the atomic objects in the system. This graph should
- * never contain any cycles, as that represents a violation of the
- * memory model (total ordering). This graph really consists of many
- * disjoint (unconnected) subgraphs, each graph corresponding to a
- * separate ordering on a distinct object.
- *
- * The edges in this graph represent the "ordered before" relation,
- * such that <tt>a --> b</tt> means <tt>a</tt> was ordered before
- * <tt>b</tt>.
- */
- CycleGraph *mo_graph;
- bool failed_promise;
- bool too_many_reads;
- bool asserted;
- /** @brief Incorrectly-ordered synchronization was made */
- bool bad_synchronization;
+
+ ModelVector<TraceAnalysis *> trace_analyses;
+ char random_state[256];
+
+ /** @bref Plugin that can inspect new actions. */
+ TraceAnalysis *inspect_plugin;
+ /** @brief The cumulative execution stats */
+ struct execution_stats stats;
+ void record_stats();
+ void run_trace_analyses();
+ void print_bugs() const;
+ void print_execution(bool printbugs) const;
+ void print_stats() const;
};
extern ModelChecker *model;
+void parse_options(struct model_params *params);
+void install_trace_analyses(ModelExecution *execution);
-#endif /* __MODEL_H__ */
+#endif /* __MODEL_H__ */
projects / c11tester.git / blobdiff