#ifndef __ACTION_H__
#define __ACTION_H__
-#include <list>
#include <cstddef>
+#include <inttypes.h>
-#include "threads.h"
#include "mymemory.h"
-#include "clockvector.h"
#include "memoryorder.h"
+#include "modeltypes.h"
+
+/* Forward declarations */
+class ClockVector;
+class Thread;
+class Promise;
+
+namespace std {
+ class mutex;
+}
using std::memory_order;
using std::memory_order_relaxed;
using std::memory_order_acq_rel;
using std::memory_order_seq_cst;
-/** Note that this value can be legitimately used by a program, and
- hence by iteself does not indicate no value. */
+/**
+ * @brief A recognizable don't-care value for use in the ModelAction::value
+ * field
+ *
+ * Note that this value can be legitimately used by a program, and hence by
+ * iteself does not indicate no value.
+ */
+#define VALUE_NONE 0xdeadbeef
-#define VALUE_NONE 1234567890
+/**
+ * @brief The "location" at which a fence occurs
+ *
+ * We need a non-zero memory location to associate with fences, since our hash
+ * tables don't handle NULL-pointer keys. HACK: Hopefully this doesn't collide
+ * with any legitimate memory locations.
+ */
+#define FENCE_LOCATION ((void *)0x7)
/** @brief Represents an action type, identifying one of several types of
* ModelAction */
typedef enum action_type {
+ MODEL_FIXUP_RELSEQ, /**< Special ModelAction: finalize a release
+ * sequence */
THREAD_CREATE, /**< A thread creation action */
THREAD_START, /**< First action in each thread */
THREAD_YIELD, /**< A thread yield action */
THREAD_JOIN, /**< A thread join action */
+ THREAD_FINISH, /**< A thread completion action */
+ ATOMIC_UNINIT, /**< Represents an uninitialized atomic */
ATOMIC_READ, /**< An atomic read action */
ATOMIC_WRITE, /**< An atomic write action */
ATOMIC_RMWR, /**< The read part of an atomic RMW action */
ATOMIC_RMW, /**< The write part of an atomic RMW action */
ATOMIC_RMWC, /**< Convert an atomic RMW action into a READ */
- ATOMIC_INIT /**< Initialization of an atomic object (e.g.,
+ ATOMIC_INIT, /**< Initialization of an atomic object (e.g.,
* atomic_init()) */
+ ATOMIC_FENCE, /**< A fence action */
+ ATOMIC_LOCK, /**< A lock action */
+ ATOMIC_TRYLOCK, /**< A trylock action */
+ ATOMIC_UNLOCK, /**< An unlock action */
+ ATOMIC_NOTIFY_ONE, /**< A notify_one action */
+ ATOMIC_NOTIFY_ALL, /**< A notify all action */
+ ATOMIC_WAIT, /**< A wait action */
+ ATOMIC_ANNOTATION /**< An annotation action to pass information
+ to a trace analysis */
} action_type_t;
/* Forward declaration */
class ClockVector;
/**
- * The ModelAction class encapsulates an atomic action.
+ * @brief Represents a single atomic action
+ *
+ * A ModelAction is always allocated as non-snapshotting, because it is used in
+ * multiple executions during backtracking. Except for fake uninitialized
+ * (ATOMIC_UNINIT) ModelActions, each action is assigned a unique sequence
+ * number.
*/
class ModelAction {
public:
- ModelAction(action_type_t type, memory_order order, void *loc, uint64_t value = VALUE_NONE);
+ ModelAction(action_type_t type, memory_order order, void *loc, uint64_t value = VALUE_NONE, Thread *thread = NULL);
~ModelAction();
- void print(void) const;
+ void print() const;
thread_id_t get_tid() const { return tid; }
action_type get_type() const { return type; }
memory_order get_mo() const { return order; }
+ memory_order get_original_mo() const { return original_order; }
+ void set_mo(memory_order order) { this->order = order; }
void * get_location() const { return location; }
modelclock_t get_seq_number() const { return seq_number; }
uint64_t get_value() const { return value; }
+ uint64_t get_reads_from_value() const;
+ uint64_t get_write_value() const;
+ uint64_t get_return_value() const;
const ModelAction * get_reads_from() const { return reads_from; }
+ Promise * get_reads_from_promise() const { return reads_from_promise; }
+ std::mutex * get_mutex() const;
- Node * get_node() const { return node; }
+ Node * get_node() const;
void set_node(Node *n) { node = n; }
+ void set_read_from(const ModelAction *act);
+ void set_read_from_promise(Promise *promise);
+
+ /** Store the most recent fence-release from the same thread
+ * @param fence The fence-release that occured prior to this */
+ void set_last_fence_release(const ModelAction *fence) { last_fence_release = fence; }
+ /** @return The most recent fence-release from the same thread */
+ const ModelAction * get_last_fence_release() const { return last_fence_release; }
+
+ void copy_from_new(ModelAction *newaction);
+ void set_seq_number(modelclock_t num);
+ void set_try_lock(bool obtainedlock);
+ bool is_thread_start() const;
+ bool is_thread_join() const;
+ bool is_relseq_fixup() const;
+ bool is_mutex_op() const;
+ bool is_lock() const;
+ bool is_trylock() const;
+ bool is_unlock() const;
+ bool is_wait() const;
+ bool is_notify() const;
+ bool is_notify_one() const;
+ bool is_success_lock() const;
+ bool is_failed_trylock() const;
+ bool is_atomic_var() const;
+ bool is_uninitialized() const;
bool is_read() const;
bool is_write() const;
+ bool is_yield() const;
+ bool could_be_write() const;
bool is_rmwr() const;
bool is_rmwc() const;
bool is_rmw() const;
+ bool is_fence() const;
bool is_initialization() const;
+ bool is_annotation() const;
+ bool is_relaxed() const;
bool is_acquire() const;
bool is_release() const;
bool is_seqcst() const;
bool same_var(const ModelAction *act) const;
bool same_thread(const ModelAction *act) const;
- bool is_synchronizing(const ModelAction *act) const;
+ bool is_conflicting_lock(const ModelAction *act) const;
+ bool could_synchronize_with(const ModelAction *act) const;
+
+ Thread * get_thread_operand() const;
void create_cv(const ModelAction *parent = NULL);
ClockVector * get_cv() const { return cv; }
- void read_from(const ModelAction *act);
- void synchronized(const ModelAction *act);
-
+ bool synchronize_with(const ModelAction *act);
+ bool has_synchronized_with(const ModelAction *act) const;
bool happens_before(const ModelAction *act) const;
inline bool operator <(const ModelAction& act) const {
void process_rmw(ModelAction * act);
void copy_typeandorder(ModelAction * act);
+ void set_sleep_flag() { sleep_flag=true; }
+ bool get_sleep_flag() { return sleep_flag; }
+ unsigned int hash() const;
+
+ bool equals(const ModelAction *x) const { return this == x; }
+ bool equals(const Promise *x) const { return false; }
+
+ bool may_read_from(const ModelAction *write) const;
+ bool may_read_from(const Promise *promise) const;
MEMALLOC
private:
- /** Type of action (read, write, thread create, thread yield, thread join) */
+ const char * get_type_str() const;
+ const char * get_mo_str() const;
+
+ /** @brief Type of action (read, write, RMW, fence, thread create, etc.) */
action_type type;
- /** The memory order for this operation. */
+ /** @brief The memory order for this operation. */
memory_order order;
- /** A pointer to the memory location for this action. */
+ /** @brief The original memory order parameter for this operation. */
+ memory_order original_order;
+
+ /** @brief A pointer to the memory location for this action. */
void *location;
- /** The thread id that performed this action. */
+ /** @brief The thread id that performed this action. */
thread_id_t tid;
- /** The value written (for write or RMW; undefined for read) */
+ /** @brief The value written (for write or RMW; undefined for read) */
uint64_t value;
- /** The action that this action reads from. Only valid for reads */
+ /**
+ * @brief The store that this action reads from
+ *
+ * Only valid for reads
+ */
const ModelAction *reads_from;
- /** A back reference to a Node in NodeStack, if this ModelAction is
- * saved on the NodeStack. */
+ /**
+ * @brief The promise that this action reads from
+ *
+ * Only valid for reads
+ */
+ Promise *reads_from_promise;
+
+ /** @brief The last fence release from the same thread */
+ const ModelAction *last_fence_release;
+
+ /**
+ * @brief A back reference to a Node in NodeStack
+ *
+ * Only set if this ModelAction is saved on the NodeStack. (A
+ * ModelAction can be thrown away before it ever enters the NodeStack.)
+ */
Node *node;
+ /**
+ * @brief The sequence number of this action
+ *
+ * Except for ATOMIC_UNINIT actions, this number should be unique and
+ * should represent the action's position in the execution order.
+ */
modelclock_t seq_number;
- /** The clock vector stored with this action; only needed if this
- * action is a store release? */
+ /**
+ * @brief The clock vector for this operation
+ *
+ * Technically, this is only needed for potentially synchronizing
+ * (e.g., non-relaxed) operations, but it is very handy to have these
+ * vectors for all operations.
+ */
ClockVector *cv;
-};
-typedef std::list<ModelAction *> action_list_t;
+ bool sleep_flag;
+};
#endif /* __ACTION_H__ */
projects / model-checker.git / blobdiff