/* **********************************************************
 * Copyright (c) 2023 Google, Inc.  All rights reserved.
 * **********************************************************/

/*
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * * Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * * Neither the name of Google, Inc. nor the names of its contributors may be
 *   used to endorse or promote products derived from this software without
 *   specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL VMWARE, INC. OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */

#ifndef _SYSCALL_MIX_H_
#define _SYSCALL_MIX_H_ 1

#include <stdint.h>

#include <mutex>
#include <string>
#include <unordered_map>

#include "analysis_tool.h"
#include "memref.h"

namespace dynamorio {
namespace drmemtrace {

class syscall_mix_t : public analysis_tool_t {
public:
    syscall_mix_t(unsigned int verbose);
    virtual ~syscall_mix_t();
    bool
    process_memref(const memref_t &memref) override;
    bool
    print_results() override;
    bool
    parallel_shard_supported() override;
    void *
    parallel_worker_init(int worker_index) override;
    std::string
    parallel_worker_exit(void *worker_data) override;
    void *
    parallel_shard_init(int shard_index, void *worker_data) override;
    bool
    parallel_shard_exit(void *shard_data) override;
    bool
    parallel_shard_memref(void *shard_data, const memref_t &memref) override;
    std::string
    parallel_shard_error(void *shard_data) override;

protected:
    struct shard_data_t {
        std::unordered_map<int, int64_t> syscall_counts;
        std::string error;
    };

    std::unordered_map<memref_tid_t, shard_data_t *> shard_map_;
    // This mutex is only needed in parallel_shard_init.  In all other accesses to
    // shard_map_ (print_results) we are single-threaded.
    std::mutex shard_map_mutex_;
    shard_data_t serial_shard_;
    unsigned int knob_verbose_;

    static const std::string TOOL_NAME;
};

} // namespace drmemtrace
} // namespace dynamorio

#endif /* _SYSCALL_MIX_H_ */