X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=model.h;h=86e0b1e7b05a8174a05d8a3f28dc7132432962d5;hb=0cb167b8fb332e4d9726badd0aa58e943bb4b459;hp=db1360124eb9f6da159ac0182ea247a34f25dc6a;hpb=cd3c3b85485b68891c2024b50c08443736aa7268;p=model-checker.git diff --git a/model.h b/model.h index db13601..86e0b1e 100644 --- a/model.h +++ b/model.h @@ -1,101 +1,137 @@ +/** @file model.h + * @brief Core model checker. + */ + #ifndef __MODEL_H__ #define __MODEL_H__ #include -#include +#include #include +#include #include "schedule.h" +#include "mymemory.h" #include "libthreads.h" -#include "libatomic.h" #include "threads.h" -#include "tree.h" +#include "action.h" +#include "clockvector.h" +#include "hashtable.h" + +/* Forward declaration */ +class NodeStack; +class CycleGraph; +class Promise; + +/** + * Model checker parameter structure. Holds run-time configuration options for + * the model checker. + */ +struct model_params { +}; -#define VALUE_NONE -1 +/** @brief The central structure for model-checking */ +class ModelChecker { +public: + ModelChecker(struct model_params params); + ~ModelChecker(); -typedef enum action_type { - THREAD_CREATE, - THREAD_YIELD, - THREAD_JOIN, - ATOMIC_READ, - ATOMIC_WRITE -} action_type_t; + /** Stores the context for the main model-checking system thread (call + * once) + * @param ctxt The system context structure + */ + void set_system_context(ucontext_t *ctxt) { system_context = ctxt; } -typedef std::list action_list_t; + /** @returns the context for the main model-checking system thread */ + ucontext_t * get_system_context(void) { return system_context; } -class ModelAction { -public: - ModelAction(action_type_t type, memory_order order, void *loc, int value); - void print(void); + void check_current_action(void); - thread_id_t get_tid() { return tid; } - action_type get_type() { return type; } - memory_order get_mo() { return order; } - void *get_location() { return location; } + /** Prints an execution summary with trace information. */ + void print_summary(); - TreeNode *get_node() { return node; } - void set_node(TreeNode *n) { node = n; } -private: - action_type type; - memory_order order; - void *location; - thread_id_t tid; - int value; - TreeNode *node; -}; + Thread * schedule_next_thread(); -class Backtrack { -public: - Backtrack(ModelAction *d, action_list_t *t) { - diverge = d; - actionTrace = t; - iter = actionTrace->begin(); - } - ModelAction *get_diverge() { return diverge; } - action_list_t *get_trace() { return actionTrace; } - void advance_state() { iter++; } - ModelAction *get_state() { - return iter == actionTrace->end() ? NULL : *iter; - } + int 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_id_t get_next_id(); + int get_num_threads(); + modelclock_t get_next_seq_num(); + + /** @return The currently executing Thread. */ + Thread * get_current_thread() { return scheduler->get_current_thread(); } + + int switch_to_master(ModelAction *act); + ClockVector * get_cv(thread_id_t tid); + bool next_execution(); + bool isfeasible(); + bool isfinalfeasible(); + void check_promises(ClockVector *old_cv, ClockVector * merge_cv); + + void finish_execution(); + + MEMALLOC private: - ModelAction *diverge; - action_list_t *actionTrace; - /* points to position in actionTrace as we replay */ - action_list_t::iterator iter; -}; + /** The scheduler to use: tracks the running/ready Threads */ + Scheduler *scheduler; -class ModelChecker { -public: - ModelChecker(); - ~ModelChecker(); - class Scheduler *scheduler; - Thread *system_thread; + int next_thread_id; + modelclock_t used_sequence_numbers; + int num_executions; - void add_system_thread(Thread *t); + const model_params params; + /** + * 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) { current_action = act; } - ModelAction *get_last_conflict(ModelAction *act); - void check_current_action(void); - void set_backtracking(ModelAction *act); - void print_trace(void); - int add_thread(Thread *t); - Thread *get_thread(thread_id_t tid) { return thread_map[tid]; } + bool take_step(); - void assign_id(Thread *t); + ModelAction * get_last_conflict(ModelAction *act); + void set_backtracking(ModelAction *act); + thread_id_t get_next_replay_thread(); + ModelAction * get_next_backtrack(); + void reset_to_initial_state(); + void resolve_promises(ModelAction *curr); + void compute_promises(ModelAction *curr); + + void add_action_to_lists(ModelAction *act); + ModelAction * get_last_action(thread_id_t tid); + ModelAction * get_parent_action(thread_id_t tid); + ModelAction * get_last_seq_cst(const void *location); + void build_reads_from_past(ModelAction *curr); + ModelAction * process_rmw(ModelAction * curr); + void post_r_modification_order(ModelAction * curr, const ModelAction *rf); + void r_modification_order(ModelAction * curr, const ModelAction *rf); + void w_modification_order(ModelAction * curr); + + ModelAction *current_action; + ModelAction *diverge; + thread_id_t nextThread; - int switch_to_master(ModelAction *act); -private: - int used_thread_id; - class ModelAction *current_action; + ucontext_t *system_context; action_list_t *action_trace; - std::map thread_map; - class TreeNode *rootNode, *currentNode; - std::list backtrack_list; + 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 *thrd_last_action; + NodeStack *node_stack; + ModelAction *next_backtrack; + CycleGraph * cyclegraph; + bool failed_promise; }; extern ModelChecker *model; -int thread_switch_to_master(ModelAction *act); - #endif /* __MODEL_H__ */