X-Git-Url: http://plrg.eecs.uci.edu/git/?p=model-checker.git;a=blobdiff_plain;f=nodestack.h;h=6ae96be8d508d9b598ae3bb3c396760fea6047da;hp=d2e6491b2edec5891943351e9891b358f2b05594;hb=a65e234b607444355eb6e34097ee55ba93d4c01b;hpb=f10dc6ce67a97ab18423e7cedaa24961bf0d80dc diff --git a/nodestack.h b/nodestack.h index d2e6491..6ae96be 100644 --- a/nodestack.h +++ b/nodestack.h @@ -5,44 +5,44 @@ #ifndef __NODESTACK_H__ #define __NODESTACK_H__ -#include #include #include #include "mymemory.h" -#include "modeltypes.h" #include "schedule.h" +#include "promise.h" +#include "stl-model.h" class ModelAction; class Thread; -/** - * A flag used for the promise counting/combination problem within a node, - * denoting whether a particular Promise is - *
  1. @b applicable: can be satisfied by this Node's ModelAction and
    2. - *
  2. @b fulfilled: satisfied by this Node's ModelAction under the current - * configuration.
- */ - -#define PROMISE_IGNORE 0 /**< This promise is inapplicable; ignore it */ -#define PROMISE_UNFULFILLED 1 /**< This promise is applicable but unfulfilled */ -#define PROMISE_FULFILLED 2 /**< This promise is applicable and fulfilled */ -#define PROMISE_MASK 0xf -#define PROMISE_RMW 0x10 - -typedef int promise_t; - -struct future_value { - uint64_t value; - modelclock_t expiration; -}; - struct fairness_info { unsigned int enabled_count; unsigned int turns; bool priority; }; +/** + * @brief Types of read-from relations + * + * Our "may-read-from" set is composed of multiple types of reads, and we have + * to iterate through all of them in the backtracking search. This enumeration + * helps to identify which type of read-from we are currently observing. + */ +typedef enum { + READ_FROM_PAST, /**< @brief Read from a prior, existing store */ + READ_FROM_PROMISE, /**< @brief Read from an existing promised future value */ + READ_FROM_FUTURE, /**< @brief Read from a newly-asserted future value */ + READ_FROM_NONE, /**< @brief A NULL state, which should not be reached */ +} read_from_type_t; + +#define YIELD_E 1 +#define YIELD_D 2 +#define YIELD_S 4 +#define YIELD_P 8 +#define YIELD_INDEX(tid1, tid2, num_threads) (tid1*num_threads+tid2) + + /** * @brief A single node in a NodeStack * @@ -54,13 +54,15 @@ struct fairness_info { */ class Node { public: - Node(ModelAction *act, Node *par, int nthreads, Node *prevfairness); + Node(const struct model_params *params, ModelAction *act, Node *par, + int nthreads, Node *prevfairness); ~Node(); /* return true = thread choice has already been explored */ bool has_been_explored(thread_id_t tid) const; /* return true = backtrack set is empty */ bool backtrack_empty() const; + void clear_backtracking(); void explore_child(ModelAction *act, enabled_type_t *is_enabled); /* return false = thread was already in backtrack */ bool set_backtrack(thread_id_t id); @@ -70,28 +72,42 @@ public: enabled_type_t enabled_status(thread_id_t tid) const; ModelAction * get_action() const { return action; } + void set_uninit_action(ModelAction *act) { uninit_action = act; } + ModelAction * get_uninit_action() const { return uninit_action; } + bool has_priority(thread_id_t tid) const; + void update_yield(Scheduler *); + bool has_priority_over(thread_id_t tid, thread_id_t tid2) const; int get_num_threads() const { return num_threads; } /** @return the parent Node to this Node; that is, the action that * occurred previously in the stack. */ Node * get_parent() const { return parent; } - bool add_future_value(const ModelAction *writer, modelclock_t expiration); - struct future_value get_future_value() const; - bool increment_future_value(); - bool future_value_empty() const; - - void add_read_from(const ModelAction *act); - const ModelAction * get_read_from() const; + read_from_type_t get_read_from_status(); bool increment_read_from(); bool read_from_empty() const; - int get_read_from_size() const; - const ModelAction * get_read_from_at(int i) const; + unsigned int read_from_size() const; + + void print_read_from_past(); + void add_read_from_past(const ModelAction *act); + const ModelAction * get_read_from_past() const; + const ModelAction * get_read_from_past(int i) const; + int get_read_from_past_size() const; - void set_promise(unsigned int i, bool is_rmw); + void add_read_from_promise(const ModelAction *reader); + Promise * get_read_from_promise() const; + Promise * get_read_from_promise(int i) const; + int get_read_from_promise_size() const; + + bool add_future_value(struct future_value fv); + struct future_value get_future_value() const; + + void set_promise(unsigned int i); bool get_promise(unsigned int i) const; bool increment_promise(); bool promise_empty() const; + void clear_promise_resolutions(); + enabled_type_t *get_enabled_array() {return enabled_array;} void set_misc_max(int i); @@ -104,40 +120,63 @@ public: bool increment_relseq_break(); bool relseq_break_empty() const; - void print(); - void print_may_read_from(); + bool increment_behaviors(); + + void print() const; MEMALLOC private: void explore(thread_id_t tid); + int get_yield_data(int tid1, int tid2) const; + bool read_from_past_empty() const; + bool increment_read_from_past(); + bool read_from_promise_empty() const; + bool increment_read_from_promise(); + bool future_value_empty() const; + bool increment_future_value(); + read_from_type_t read_from_status; + const struct model_params * get_params() const { return params; } ModelAction * const action; + + const struct model_params * const params; + + /** @brief ATOMIC_UNINIT action which was created at this Node */ + ModelAction *uninit_action; + Node * const parent; const int num_threads; - std::vector< bool, ModelAlloc > explored_children; - std::vector< bool, ModelAlloc > backtrack; - std::vector< struct fairness_info, ModelAlloc< struct fairness_info> > fairness; + ModelVector explored_children; + ModelVector backtrack; + ModelVector fairness; int numBacktracks; enabled_type_t *enabled_array; - /** The set of ModelActions that this the action at this Node may read - * from. Only meaningful if this Node represents a 'read' action. */ - std::vector< const ModelAction *, ModelAlloc< const ModelAction * > > may_read_from; + /** + * The set of past ModelActions that this the action at this Node may + * read from. Only meaningful if this Node represents a 'read' action. + */ + ModelVector read_from_past; + unsigned int read_from_past_idx; - unsigned int read_from_index; + ModelVector read_from_promises; + int read_from_promise_idx; - std::vector< struct future_value, ModelAlloc > future_values; - std::vector< promise_t, ModelAlloc > promises; + ModelVector future_values; int future_index; - std::vector< const ModelAction *, ModelAlloc > relseq_break_writes; + ModelVector resolve_promise; + int resolve_promise_idx; + + ModelVector relseq_break_writes; int relseq_break_index; int misc_index; int misc_max; + int * yield_data; }; -typedef std::vector< Node *, ModelAlloc< Node * > > node_list_t; +typedef ModelVector node_list_t; /** * @brief A stack of nodes @@ -151,11 +190,15 @@ class NodeStack { public: NodeStack(); ~NodeStack(); + + void register_engine(const ModelExecution *exec); + ModelAction * explore_action(ModelAction *act, enabled_type_t * is_enabled); Node * get_head() const; Node * get_next() const; void reset_execution(); void pop_restofstack(int numAhead); + void full_reset(); int get_total_nodes() { return total_nodes; } void print() const; @@ -164,6 +207,11 @@ public: private: node_list_t node_list; + const struct model_params * get_params() const; + + /** @brief The model-checker execution object */ + const ModelExecution *execution; + /** * @brief the index position of the current head Node *