#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 Node;
class NodeStack;
class CycleGraph;
class Promise;
class Scheduler;
class Thread;
+class ClockVector;
struct model_snapshot_members;
/** @brief Shorthand for a list of release sequence heads */
typedef std::vector< const ModelAction *, ModelAlloc<const ModelAction *> > rel_heads_list_t;
+typedef std::list< ModelAction *, SnapshotAlloc<ModelAction *> > action_list_t;
+
/**
* Model checker parameter structure. Holds run-time configuration options for
* the model checker.
* expiration time exceeds the existing one by more than the slop
* value */
unsigned int expireslop;
+
+ /** @brief Verbosity (0 = quiet; 1 = noisy) */
+ int verbose;
+
+ /** @brief Command-line argument count to pass to user program */
+ int argc;
+
+ /** @brief Command-line arguments to pass to user program */
+ char **argv;
};
/** @brief Model checker execution stats */
int num_infeasible; /**< @brief Number of infeasible executions */
int num_buggy_executions; /** @brief Number of buggy executions */
int num_complete; /**< @brief Number of feasible, non-buggy, complete executions */
+ int num_redundant; /**< @brief Number of redundant, aborted executions */
};
struct PendingFutureValue {
- ModelAction *writer;
+ PendingFutureValue(ModelAction *writer, ModelAction *act) : writer(writer), act(act) { }
+ const ModelAction *writer;
ModelAction *act;
};
struct release_seq {
/** @brief The acquire operation */
ModelAction *acquire;
- /** @brief The head of the RMW chain from which 'acquire' reads; may be
+ /** @brief The read operation that may read from a release sequence;
+ * may be the same as acquire, or else an earlier action in the same
+ * thread (i.e., when 'acquire' is a fence-acquire) */
+ const ModelAction *read;
+ /** @brief The head of the RMW chain from which 'read' reads; may be
* equal to 'release' */
const ModelAction *rf;
/** @brief The head of the potential longest release sequence chain */
ModelChecker(struct model_params params);
~ModelChecker();
+ void run();
+
/** @returns the context for the main model-checking system thread */
ucontext_t * get_system_context() { return &system_context; }
- /** Prints an execution summary with trace information. */
- void print_summary();
+ void print_summary() const;
#if SUPPORT_MOD_ORDER_DUMP
- void dumpGraph(char *filename);
+ void dumpGraph(char *filename) const;
#endif
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 * get_thread(const ModelAction *act) const;
+ int get_promise_number(const Promise *promise) const;
bool is_enabled(Thread *t) const;
bool is_enabled(thread_id_t tid) const;
thread_id_t get_next_id();
unsigned int get_num_threads() const;
- Thread * get_current_thread();
+ Thread * get_current_thread() const;
- 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() const;
- bool isfeasibleotherthanRMW() const;
- bool isfinalfeasible() const;
+ void switch_from_master(Thread *thread);
+ uint64_t switch_to_master(ModelAction *act);
+ ClockVector * get_cv(thread_id_t tid) const;
+ ModelAction * get_parent_action(thread_id_t tid) const;
void check_promises_thread_disabled();
- 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();
+ void check_promises(thread_id_t tid, ClockVector *old_cv, ClockVector *merge_cv);
bool isfeasibleprefix() const;
- void assert_bug(const char *msg, bool user_thread = false, bool immediate = false);
- void assert_bug(bool user_thread = true);
- void assert_bug_immediate(const char *msg);
-
- void set_assert() {asserted=true;}
- bool is_deadlocked() const;
- bool is_complete_execution() const;
-
- /** @brief Alert the model-checker that an incorrectly-ordered
- * synchronization was made */
- void set_bad_synchronization() { bad_synchronization = true; }
+ bool assert_bug(const char *msg);
+ void assert_user_bug(const char *msg);
const model_params params;
- Node * get_curr_node();
+ Node * get_curr_node() const;
MEMALLOC
private:
/** 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;}
+ Scheduler * const 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() const;
+ void set_assert();
+ void set_bad_synchronization();
bool promises_expired() const;
void execute_sleep_set();
- void wake_up_sleeping_actions(ModelAction * curr);
+ bool should_wake_up(const ModelAction *curr, const Thread *thread) const;
+ void wake_up_sleeping_actions(ModelAction *curr);
modelclock_t get_next_seq_num();
- void set_current_action(ModelAction *act);
- Thread * check_current_action(ModelAction *curr);
+ bool next_execution();
+ ModelAction * check_current_action(ModelAction *curr);
bool initialize_curr_action(ModelAction **curr);
- bool process_read(ModelAction *curr, bool second_part_of_rmw);
+ bool process_read(ModelAction *curr);
bool process_write(ModelAction *curr);
+ bool process_fence(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 read_from(ModelAction *act, const ModelAction *rf);
bool check_action_enabled(ModelAction *curr);
- bool take_step();
+ Thread * take_step(ModelAction *curr);
- void check_recency(ModelAction *curr, const ModelAction *rf);
- ModelAction * get_last_conflict(ModelAction *act);
+ template <typename T>
+ bool check_recency(ModelAction *curr, const T *rf) const;
+
+ template <typename T, typename U>
+ bool should_read_instead(const ModelAction *curr, const T *rf, const U *other_rf) const;
+
+ ModelAction * get_last_fence_conflict(ModelAction *act) const;
+ ModelAction * get_last_conflict(ModelAction *act) const;
void set_backtracking(ModelAction *act);
Thread * get_next_thread(ModelAction *curr);
+ bool set_latest_backtrack(ModelAction *act);
ModelAction * get_next_backtrack();
void reset_to_initial_state();
- bool resolve_promises(ModelAction *curr);
+ int get_promise_to_resolve(const ModelAction *curr) const;
+ bool resolve_promise(ModelAction *curr, unsigned int promise_idx);
void compute_promises(ModelAction *curr);
void compute_relseq_breakwrites(ModelAction *curr);
- void check_curr_backtracking(ModelAction * curr);
+ void mo_check_promises(const ModelAction *act, bool is_read_check);
+ void thread_blocking_check_promises(Thread *blocker, Thread *waiting);
+
+ 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_fence_release(thread_id_t tid) const;
+ ModelAction * get_last_seq_cst_write(ModelAction *curr) const;
+ ModelAction * get_last_seq_cst_fence(thread_id_t tid, const ModelAction *before_fence) const;
ModelAction * get_last_unlock(ModelAction *curr) const;
- void build_reads_from_past(ModelAction *curr);
+ void build_may_read_from(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);
+
+ template <typename rf_type>
+ bool r_modification_order(ModelAction *curr, const rf_type *rf);
+
+ bool w_modification_order(ModelAction *curr, std::vector< ModelAction *, ModelAlloc<ModelAction *> > *send_fv);
+ void get_release_seq_heads(ModelAction *acquire, ModelAction *read, rel_heads_list_t *release_heads);
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);
+ void add_future_value(const ModelAction *writer, ModelAction *reader);
+
+ ModelAction * new_uninitialized_action(void *location) const;
ModelAction *diverge;
ModelAction *earliest_diverge;
ucontext_t system_context;
- action_list_t *action_trace;
- HashTable<int, Thread *, int> *thread_map;
+ action_list_t * const action_trace;
+ HashTable<int, Thread *, int> * const 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;
+ HashTable<const void *, action_list_t *, uintptr_t, 4> * const 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;
+ HashTable<const void *, action_list_t *, uintptr_t, 4> * const 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<const void *, action_list_t *, uintptr_t, 4> * const 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;
+ HashTable<void *, std::vector<action_list_t> *, uintptr_t, 4 > * const obj_thrd_map;
+ std::vector< Promise *, SnapshotAlloc<Promise *> > * const promises;
+ std::vector< struct PendingFutureValue, SnapshotAlloc<struct PendingFutureValue> > * const futurevalues;
/**
* List of pending release sequences. Release sequences might be
* 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< struct release_seq *, SnapshotAlloc<struct release_seq *> > * const pending_rel_seqs;
- std::vector< ModelAction *, SnapshotAlloc<ModelAction *> > *thrd_last_action;
- NodeStack *node_stack;
+ std::vector< ModelAction *, SnapshotAlloc<ModelAction *> > * const thrd_last_action;
+ std::vector< ModelAction *, SnapshotAlloc<ModelAction *> > * const thrd_last_fence_release;
+ NodeStack * const node_stack;
/** Private data members that should be snapshotted. They are grouped
* together for efficiency and maintainability. */
- struct model_snapshot_members *priv;
+ struct model_snapshot_members * const priv;
/** A special model-checker Thread; used for associating with
* model-checker-related ModelAcitons */
* 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;
+ CycleGraph * const mo_graph;
/** @brief The cumulative execution stats */
struct execution_stats stats;
void record_stats();
- void print_stats() const;
+ void print_infeasibility(const char *prefix) const;
+ bool is_feasible_prefix_ignore_relseq() const;
+ bool is_infeasible() const;
+ bool is_deadlocked() const;
+ bool is_complete_execution() const;
bool have_bug_reports() const;
void print_bugs() const;
+ void print_execution(bool printbugs) const;
+ void print_stats() const;
+
+ friend void user_main_wrapper();
};
extern ModelChecker *model;
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