X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=model.h;h=25e20b129dc6b5280fc28af939495b713c7b1971;hb=39cf60160fae4c59519004440bd49aba714c1edf;hp=b2b312f890328e5606887e73a62018eced76ba87;hpb=d0d6770dbaf99df616c3c1a142581514e8231c70;p=cdsspec-compiler.git diff --git a/model.h b/model.h index b2b312f..25e20b1 100644 --- a/model.h +++ b/model.h @@ -5,52 +5,38 @@ #ifndef __MODEL_H__ #define __MODEL_H__ -#include -#include #include -#include +#include -#include "schedule.h" #include "mymemory.h" -#include "libthreads.h" -#include "threads.h" -#include "action.h" -#include "clockvector.h" #include "hashtable.h" -#include "workqueue.h" +#include "config.h" +#include "modeltypes.h" +#include "stl-model.h" +#include "context.h" +#include "params.h" /* Forward declaration */ +class Node; class NodeStack; class CycleGraph; class Promise; - -/** - * Model checker parameter structure. Holds run-time configuration options for - * the model checker. - */ -struct model_params { - int maxreads; - int maxfuturedelay; -}; - -struct PendingFutureValue { - uint64_t value; - modelclock_t expiration; - ModelAction * act; -}; - -/** - * Structure for holding small ModelChecker members that should be snapshotted - */ -struct model_snapshot_members { - ModelAction *current_action; - int next_thread_id; - modelclock_t used_sequence_numbers; - Thread *nextThread; - ModelAction *next_backtrack; - - /** @see ModelChecker::lazy_sync_size */ - unsigned int lazy_sync_size; +class Scheduler; +class Thread; +class ClockVector; +class TraceAnalysis; +class ModelExecution; +class ModelAction; + +typedef SnapList action_list_t; + +/** @brief Model checker execution stats */ +struct execution_stats { + int num_total; /**< @brief Total number of executions */ + 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 */ }; /** @brief The central structure for model-checking */ @@ -59,144 +45,70 @@ public: 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(); + ModelExecution * get_execution() const { return execution; } - void add_thread(Thread *t); - void remove_thread(Thread *t); - Thread * get_thread(thread_id_t tid) { return thread_map->get(id_to_int(tid)); } - Thread * get_thread(ModelAction *act) { return get_thread(act->get_tid()); } + int get_execution_number() const { return execution_number; } - thread_id_t get_next_id(); - int get_num_threads(); - modelclock_t get_next_seq_num(); + Thread * get_thread(thread_id_t tid) const; + Thread * get_thread(const ModelAction *act) const; - /** @return The currently executing Thread. */ - Thread * get_current_thread() { return scheduler->get_current_thread(); } + bool is_enabled(Thread *t) const; + bool is_enabled(thread_id_t tid) 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(); - bool isfeasibleotherthanRMW(); - bool isfinalfeasible(); - void check_promises(ClockVector *old_cv, ClockVector * merge_cv); - void get_release_seq_heads(ModelAction *act, - std::vector< const ModelAction *, MyAlloc > *release_heads); - void finish_execution(); - bool isfeasibleprefix(); - void set_assert() {asserted=true;} + Thread * get_current_thread() const; + + void switch_from_master(Thread *thread); + uint64_t switch_to_master(ModelAction *act); + + bool assert_bug(const char *msg, ...); + void assert_user_bug(const char *msg); + + const model_params params; + void add_trace_analysis(TraceAnalysis *a) { + trace_analyses.push_back(a); + } MEMALLOC private: /** The scheduler to use: tracks the running/ready Threads */ - Scheduler *scheduler; - - bool thin_air_constraint_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(); - const model_params params; + Scheduler * const scheduler; + NodeStack * const node_stack; + ModelExecution *execution; + + int execution_number; - /** - * 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); - ModelAction * initialize_curr_action(ModelAction *curr); - bool process_read(ModelAction *curr, bool second_part_of_rmw); - bool process_write(ModelAction *curr); - - bool take_step(); - - void check_recency(ModelAction *curr); - ModelAction * get_last_conflict(ModelAction *act); - void set_backtracking(ModelAction *act); - Thread * get_next_thread(ModelAction *curr); - ModelAction * get_next_backtrack(); + unsigned int get_num_threads() const; + + void execute_sleep_set(); + + bool next_execution(); + bool should_terminate_execution(); + + Thread * get_next_thread(); void reset_to_initial_state(); - bool resolve_promises(ModelAction *curr); - void compute_promises(ModelAction *curr); - - void check_curr_backtracking(ModelAction * curr); - void add_action_to_lists(ModelAction *act); - ModelAction * get_last_action(thread_id_t tid); - ModelAction * get_last_seq_cst(ModelAction *curr); - 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_head(const ModelAction *rf, - std::vector< const ModelAction *, MyAlloc > *release_heads) const; - bool resolve_release_sequences(void *location, work_queue_t *work_queue); - void do_complete_join(ModelAction *join); + ModelAction *diverge; + ModelAction *earliest_diverge; ucontext_t system_context; - action_list_t *action_trace; - HashTable *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 *obj_map; - - HashTable, uintptr_t, 4 > *obj_thrd_map; - std::vector *promises; - std::vector *futurevalues; - - /** - * Collection of lists of objects that might synchronize with one or - * more release sequence. Release sequences might be determined lazily - * as promises are fulfilled and modification orders are established. - * This structure maps its lists by object location. Each ModelAction - * in the lists should be an acquire operation. - */ - HashTable, uintptr_t, 4> *lazy_sync_with_release; - - /** - * Represents the total size of the - * ModelChecker::lazy_sync_with_release lists. This count should be - * snapshotted, so it is actually a pointer to a location within - * ModelChecker::priv - */ - unsigned int *lazy_sync_size; - - std::vector *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; - - /** - * @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 a --> b means a was ordered before - * b. - */ - CycleGraph *mo_graph; - bool failed_promise; - bool too_many_reads; - bool asserted; + + ModelVector trace_analyses; + + /** @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; + + friend void user_main_wrapper(); }; extern ModelChecker *model;