modules.h

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 * Copyright (c) 2012-2013 Google, Inc.  All rights reserved.
 * ***************************************************************************/

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/*
Utilities for keeping track of (un)loaded modules in DynamoRIO clients.
Copied from the DyanmoRIO project, http://dynamorio.org/
*/

#ifndef CLIENTS_COMMON_MODULES_H_
#define CLIENTS_COMMON_MODULES_H_

#include "dr_api.h"
#include "drvector.h"

#define NUM_GLOBAL_MODULE_CACHE 8

typedef struct _module_entry_t {
    int  id;
    bool unload; /* if the module is unloaded */
    module_data_t *data;
} module_entry_t;

typedef struct _module_table_t {
    drvector_t vector;
    /* for quick query without lock, assuming pointer-aligned */
    module_entry_t *cache[NUM_GLOBAL_MODULE_CACHE];
} module_table_t;

void
module_table_load(module_table_t *table, const module_data_t *data);

/* To avoid data race, proper sychronization on module table is required for
 * accessing module table entry.
 */
module_entry_t *
module_table_lookup(module_entry_t **cache, int cache_size,
                    module_table_t *table, app_pc pc);

/* To avoid data race, proper sychronization on module table is required for
 * accessing module table entry.
 */
void
module_table_entry_print(module_entry_t *entry, file_t log, bool print_all_info);

void
module_table_unload(module_table_t *table, const module_data_t *data);

void
module_table_print(module_table_t *table, file_t log, bool print_all_info);

module_table_t *
module_table_create();

void
module_table_destroy(module_table_t *table);

#endif /* CLIENTS_COMMON_MODULES_H_ */