darshan-logutils.c 41.7 KB
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/*
 *  (C) 2009 by Argonne National Laboratory.
 *      See COPYRIGHT in top-level directory.
 */

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#define _GNU_SOURCE
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#include "darshan-util-config.h"
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#include <stdio.h>
#include <string.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <inttypes.h>
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#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

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#include "darshan-logutils.h"

/* isn't there a clever c way to avoid this? */
char *darshan_names[] = {
    "CP_INDEP_OPENS",
    "CP_COLL_OPENS",               /* count of MPI collective opens */
    "CP_INDEP_READS",              /* count of independent MPI reads */
    "CP_INDEP_WRITES",             /* count of independent MPI writes */
    "CP_COLL_READS",               /* count of collective MPI reads */
    "CP_COLL_WRITES",              /* count of collective MPI writes */
    "CP_SPLIT_READS",              /* count of split collective MPI reads */
    "CP_SPLIT_WRITES",             /* count of split collective MPI writes */
    "CP_NB_READS",                 /* count of nonblocking MPI reads */
    "CP_NB_WRITES",                /* count of nonblocking MPI writes */
    "CP_SYNCS",                    /* count of MPI_File_sync */
    "CP_POSIX_READS",              /* count of posix reads */
    "CP_POSIX_WRITES",             /* count of posix writes */
    "CP_POSIX_OPENS",              /* count of posix opens */
    "CP_POSIX_SEEKS",              /* count of posix seeks */
    "CP_POSIX_STATS",              /* count of posix stat/lstat/fstats */
    "CP_POSIX_MMAPS",              /* count of posix mmaps */
    "CP_POSIX_FREADS",
    "CP_POSIX_FWRITES",
    "CP_POSIX_FOPENS",
    "CP_POSIX_FSEEKS",
    "CP_POSIX_FSYNCS",
    "CP_POSIX_FDSYNCS",
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    "CP_INDEP_NC_OPENS",
    "CP_COLL_NC_OPENS",
    "CP_HDF5_OPENS",
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    "CP_COMBINER_NAMED",           /* count of each MPI datatype category */
    "CP_COMBINER_DUP",
    "CP_COMBINER_CONTIGUOUS",
    "CP_COMBINER_VECTOR",
    "CP_COMBINER_HVECTOR_INTEGER",
    "CP_COMBINER_HVECTOR",
    "CP_COMBINER_INDEXED",
    "CP_COMBINER_HINDEXED_INTEGER",
    "CP_COMBINER_HINDEXED",
    "CP_COMBINER_INDEXED_BLOCK",
    "CP_COMBINER_STRUCT_INTEGER",
    "CP_COMBINER_STRUCT",
    "CP_COMBINER_SUBARRAY",
    "CP_COMBINER_DARRAY",
    "CP_COMBINER_F90_REAL",
    "CP_COMBINER_F90_COMPLEX",
    "CP_COMBINER_F90_INTEGER",
    "CP_COMBINER_RESIZED",
    "CP_HINTS",                     /* count of MPI hints used */
    "CP_VIEWS",                     /* count of MPI set view calls */
    "CP_MODE",                      /* mode of file */
    "CP_BYTES_READ",                /* total bytes read */
    "CP_BYTES_WRITTEN",             /* total bytes written */
    "CP_MAX_BYTE_READ",             /* highest offset byte read */
    "CP_MAX_BYTE_WRITTEN",          /* highest offset byte written */
    "CP_CONSEC_READS",              /* count of consecutive reads */
    "CP_CONSEC_WRITES",             /* count of consecutive writes */
    "CP_SEQ_READS",                 /* count of sequential reads */
    "CP_SEQ_WRITES",                /* count of sequential writes */
    "CP_RW_SWITCHES",
    "CP_MEM_NOT_ALIGNED",           /* count of accesses not mem aligned */
    "CP_MEM_ALIGNMENT",             /* mem alignment in bytes */
    "CP_FILE_NOT_ALIGNED",          /* count of accesses not file aligned */
    "CP_FILE_ALIGNMENT",            /* file alignment in bytes */
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    "CP_MAX_READ_TIME_SIZE",
    "CP_MAX_WRITE_TIME_SIZE",
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    "CP_SIZE_READ_0_100",           /* count of posix read size ranges */
    "CP_SIZE_READ_100_1K",
    "CP_SIZE_READ_1K_10K",
    "CP_SIZE_READ_10K_100K",
    "CP_SIZE_READ_100K_1M",
    "CP_SIZE_READ_1M_4M",
    "CP_SIZE_READ_4M_10M",
    "CP_SIZE_READ_10M_100M",
    "CP_SIZE_READ_100M_1G",
    "CP_SIZE_READ_1G_PLUS",
    "CP_SIZE_WRITE_0_100",          /* count of posix write size ranges */
    "CP_SIZE_WRITE_100_1K",
    "CP_SIZE_WRITE_1K_10K",
    "CP_SIZE_WRITE_10K_100K",
    "CP_SIZE_WRITE_100K_1M",
    "CP_SIZE_WRITE_1M_4M",
    "CP_SIZE_WRITE_4M_10M",
    "CP_SIZE_WRITE_10M_100M",
    "CP_SIZE_WRITE_100M_1G",
    "CP_SIZE_WRITE_1G_PLUS",
    "CP_SIZE_READ_AGG_0_100",       /* count of MPI read size ranges */
    "CP_SIZE_READ_AGG_100_1K",
    "CP_SIZE_READ_AGG_1K_10K",
    "CP_SIZE_READ_AGG_10K_100K",
    "CP_SIZE_READ_AGG_100K_1M",
    "CP_SIZE_READ_AGG_1M_4M",
    "CP_SIZE_READ_AGG_4M_10M",
    "CP_SIZE_READ_AGG_10M_100M",
    "CP_SIZE_READ_AGG_100M_1G",
    "CP_SIZE_READ_AGG_1G_PLUS",
    "CP_SIZE_WRITE_AGG_0_100",      /* count of MPI write size ranges */
    "CP_SIZE_WRITE_AGG_100_1K",
    "CP_SIZE_WRITE_AGG_1K_10K",
    "CP_SIZE_WRITE_AGG_10K_100K",
    "CP_SIZE_WRITE_AGG_100K_1M",
    "CP_SIZE_WRITE_AGG_1M_4M",
    "CP_SIZE_WRITE_AGG_4M_10M",
    "CP_SIZE_WRITE_AGG_10M_100M",
    "CP_SIZE_WRITE_AGG_100M_1G",
    "CP_SIZE_WRITE_AGG_1G_PLUS",
    "CP_EXTENT_READ_0_100",          /* count of MPI read extent ranges */
    "CP_EXTENT_READ_100_1K",
    "CP_EXTENT_READ_1K_10K",
    "CP_EXTENT_READ_10K_100K",
    "CP_EXTENT_READ_100K_1M",
    "CP_EXTENT_READ_1M_4M",
    "CP_EXTENT_READ_4M_10M",
    "CP_EXTENT_READ_10M_100M",
    "CP_EXTENT_READ_100M_1G",
    "CP_EXTENT_READ_1G_PLUS",
    "CP_EXTENT_WRITE_0_100",         /* count of MPI write extent ranges */
    "CP_EXTENT_WRITE_100_1K",
    "CP_EXTENT_WRITE_1K_10K",
    "CP_EXTENT_WRITE_10K_100K",
    "CP_EXTENT_WRITE_100K_1M",
    "CP_EXTENT_WRITE_1M_4M",
    "CP_EXTENT_WRITE_4M_10M",
    "CP_EXTENT_WRITE_10M_100M",
    "CP_EXTENT_WRITE_100M_1G",
    "CP_EXTENT_WRITE_1G_PLUS",
    "CP_STRIDE1_STRIDE",             /* the four most frequently appearing strides */
    "CP_STRIDE2_STRIDE",
    "CP_STRIDE3_STRIDE",
    "CP_STRIDE4_STRIDE",
    "CP_STRIDE1_COUNT",              /* count of each of the most frequent strides */
    "CP_STRIDE2_COUNT",
    "CP_STRIDE3_COUNT",
    "CP_STRIDE4_COUNT",
    "CP_ACCESS1_ACCESS",
    "CP_ACCESS2_ACCESS",
    "CP_ACCESS3_ACCESS",
    "CP_ACCESS4_ACCESS",
    "CP_ACCESS1_COUNT",
    "CP_ACCESS2_COUNT",
    "CP_ACCESS3_COUNT",
    "CP_ACCESS4_COUNT",
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    "CP_DEVICE",
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    "CP_SIZE_AT_OPEN",
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    "CP_FASTEST_RANK",
    "CP_FASTEST_RANK_BYTES",
    "CP_SLOWEST_RANK",
    "CP_SLOWEST_RANK_BYTES",
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    "CP_NUM_INDICES"
};

/* isn't there a clever c way to avoid this? */
char *darshan_f_names[] = {
    "CP_F_OPEN_TIMESTAMP",        /* timestamp of first open */
    "CP_F_READ_START_TIMESTAMP",  /* timestamp of first read */
    "CP_F_WRITE_START_TIMESTAMP", /* timestamp of first write */
    "CP_F_CLOSE_TIMESTAMP",       /* timestamp of last close */
    "CP_F_READ_END_TIMESTAMP",    /* timestamp of last read */
    "CP_F_WRITE_END_TIMESTAMP",   /* timestamp of last write */
    "CP_F_POSIX_READ_TIME",       /* cumulative posix read time */
    "CP_F_POSIX_WRITE_TIME",      /* cumulative posix write time */
    "CP_F_POSIX_META_TIME",       /* cumulative posix meta time */
    "CP_F_MPI_META_TIME",         /* cumulative mpi-io metadata time */
    "CP_F_MPI_READ_TIME",         /* cumulative mpi-io read time */
    "CP_F_MPI_WRITE_TIME",        /* cumulative mpi-io write time */
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    "CP_F_MAX_READ_TIME",
    "CP_F_MAX_WRITE_TIME",
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    "CP_F_FASTEST_RANK_TIME",
    "CP_F_SLOWEST_RANK_TIME",
    "CP_F_VARIANCE_RANK_TIME",
    "CP_F_VARIANCE_RANK_BYTES",

    "CP_F_NUM_INDICES"
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};

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/* function pointers so that we can switch functions depending on what file
 * version is detected
 */
int (*getjob_internal)(darshan_fd file, struct darshan_job *job);
int (*getfile_internal)(darshan_fd fd, 
    struct darshan_job *job, 
    struct darshan_file *file);
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#define JOB_SIZE_124 28
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#define JOB_SIZE_200 56
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/* internal routines for parsing different file versions */
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static int getjob_internal_201(darshan_fd file, struct darshan_job *job);
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static int getjob_internal_200(darshan_fd file, struct darshan_job *job);
static int getfile_internal_200(darshan_fd fd, struct darshan_job *job, 
    struct darshan_file *file);
static int getjob_internal_124(darshan_fd file, struct darshan_job *job);
static int getfile_internal_124(darshan_fd fd, struct darshan_job *job, 
    struct darshan_file *file);
static int getfile_internal_122(darshan_fd fd, struct darshan_job *job, 
    struct darshan_file *file);
static int getfile_internal_121(darshan_fd fd, struct darshan_job *job, 
    struct darshan_file *file);
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static int getfile_internal_1x(darshan_fd fd, struct darshan_job *job, 
    struct darshan_file *file, int n_counters, int n_fcounters);
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static void shift_missing_1_24(struct darshan_file* file);
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static void shift_missing_1_22(struct darshan_file* file);
static void shift_missing_1_21(struct darshan_file* file);
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static int darshan_log_seek(darshan_fd fd, int64_t offset);
static int darshan_log_read(darshan_fd fd, void* buf, int len);
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static int darshan_log_write(darshan_fd fd, void* buf, int len);
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static const char* darshan_log_error(darshan_fd fd, int* errnum);

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/* a rather crude API for accessing raw binary darshan files */
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darshan_fd darshan_log_open(const char *name, const char* mode)
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{
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    int test_fd;
    uint8_t magic[2];
    int ret;
    int try_bz2 = 1;
    int len = strlen(name);

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    /* we only allows "w" or "r" modes, nothing fancy */
    assert(strlen(mode) == 1);
    assert(mode[0] == 'r' || mode[0] == 'w');

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    darshan_fd tmp_fd = malloc(sizeof(*tmp_fd));
    if(!tmp_fd)
        return(NULL);
    memset(tmp_fd, 0, sizeof(*tmp_fd));

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    tmp_fd->mode[0] = mode[0];
    tmp_fd->mode[1] = mode[1];
    tmp_fd->name  = strdup(name);
    if(!tmp_fd->name)
    {
        free(tmp_fd);
        return(NULL);
    }

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#ifdef HAVE_LIBBZ2
    if(strcmp(mode, "r") == 0)
    {
        /* Try to detect if existing file is a bzip2 file or not.  Both 
         * libbz2 and libz will fall back to normal I/O (without compression) 
         * automatically, so we need to do some detection manually up front 
         * in order to get a chance to try both compression formats.
         */
        test_fd = open(name, O_RDONLY);
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        if(test_fd < 0)
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        {
            perror("open");
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            free(tmp_fd->name);
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            free(tmp_fd);
            return(NULL);
        }
        ret = read(test_fd, &magic, 2);
        if(ret != 2)
        {
            fprintf(stderr, "Error: failed to read any data from %s.\n", 
                name);
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            free(tmp_fd->name);
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            free(tmp_fd);
            close(test_fd);
            return(NULL);
        }
        /* header magic for bz2 */
        if(magic[0] != 0x42 && magic[1] != 0x5A)
        {
            try_bz2 = 0;
        }
        close(test_fd);
    }
    if(strcmp(mode, "w") == 0)
    {
        /* TODO: is this the behavior that we want? */
        /* if we are writing a new file, go by the file extension to tell
         * whether to use bz2 or not?
         */
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        if(len >= 3 && name[len-3] == 'b' && name[len-2] == 'z' && name[len-1] == '2')
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            try_bz2 = 1;
        else
            try_bz2 = 0;
    }

    if(try_bz2)
    {
        tmp_fd->bzf = BZ2_bzopen(name, mode);
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        if(!tmp_fd->bzf)
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        {
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            free(tmp_fd->name);
            free(tmp_fd);
            return(NULL);
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        }
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        return(tmp_fd);
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    }
#endif

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    tmp_fd->gzf = gzopen(name, mode);
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    if(!tmp_fd->gzf)
    {
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        free(tmp_fd->name);
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        free(tmp_fd);
        tmp_fd = NULL;
    }
    return tmp_fd;
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}

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/* darshan_log_getjob()
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 *
 * returns 0 on success, -1 on failure
 */
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int darshan_log_getjob(darshan_fd file, struct darshan_job *job)
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{
    int ret;
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    char buffer[DARSHAN_JOB_METADATA_LEN];
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    ret = darshan_log_seek(file, 0);
    if(ret < 0)
        return(ret);
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    /* read version number first so we know how to digest the rest of the
     * file
     */
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    ret = darshan_log_read(file, file->version, 10);
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    if(ret < 10)
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    {
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        fprintf(stderr, "Error: invalid log file (failed to read version).\n");
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        return(-1);
    }

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    if(strcmp(file->version, "2.01") == 0)
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    {
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        getjob_internal = getjob_internal_201;
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        getfile_internal = getfile_internal_200;
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        file->job_struct_size = sizeof(*job);
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    }
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    else if(strcmp(file->version, "2.00") == 0)
    {
        getjob_internal = getjob_internal_200;
        getfile_internal = getfile_internal_200;
        file->job_struct_size = JOB_SIZE_200;
    }
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    else if(strcmp(file->version, "1.24") == 0)
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    {
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        getjob_internal = getjob_internal_124;
        getfile_internal = getfile_internal_124;
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        file->job_struct_size = JOB_SIZE_124;
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    }
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    else if(strcmp(file->version, "1.23") == 0)
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    {
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        /* same as 1.24, except that mnt points may be incorrect */
        getjob_internal = getjob_internal_124;
        getfile_internal = getfile_internal_124;
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        file->job_struct_size = JOB_SIZE_124;
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    }
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    else if(strcmp(file->version, "1.22") == 0)
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    {
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        getjob_internal = getjob_internal_124;
        getfile_internal = getfile_internal_122;
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        file->job_struct_size = JOB_SIZE_124;
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    }
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    else if(strcmp(file->version, "1.21") == 0)
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    {
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        getjob_internal = getjob_internal_124;
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        getfile_internal = getfile_internal_121;
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        file->job_struct_size = JOB_SIZE_124;
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    }
    else
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    {
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        fprintf(stderr, "Error: incompatible darshan file.\n");
        fprintf(stderr, "Error: expected version %s, but got %s\n", 
                CP_VERSION, file->version);
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        return(-1);
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    }

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    ret = getjob_internal(file, job);
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    if (ret == 0)
    {
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        char *metadata = strndup(job->metadata, sizeof(job->metadata));
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        char *kv;
        char *key;
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        char *value;
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        char *save;

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        for(kv=strtok_r(metadata, "\n", &save);
            kv != NULL;
            kv=strtok_r(NULL, "\n", &save))
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        {
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            /* NOTE: we intentionally only split on the first = character.
             * There may be additional = characters in the value portion
             * (for example, when storing mpi-io hints).
             */
            strcpy(buffer, kv);
            key = buffer;
            value = index(buffer, '=');
            if(!value)
                continue;
            /* convert = to a null terminator to split key and value */
            value[0] = '\0';
            value++;
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            if (strcmp(key, "prev_ver") == 0)
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            {
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                strncpy(job->version_string, value, sizeof(job->version_string));
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            }
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        }
        free(metadata);
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    }

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    return(ret);
}
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/* darshan_putjob()
 * write job header in gzfile
 *
 * return 0 on success, -1 on failure.
 */
int darshan_log_putjob(darshan_fd file, struct darshan_job *job)
{
    struct darshan_job job_copy;
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    char    pv_str[64];
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    int     ret;

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    ret = darshan_log_seek(file, 0);
    if(ret < 0)
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        return(ret);

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    memset(&job_copy, 0, sizeof(job_copy));
    memcpy(&job_copy, job, sizeof(job_copy));
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    sprintf(pv_str, "prev_ver=%s\n", job->version_string);
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    sprintf(job_copy.version_string, "%s", CP_VERSION);
    strncat(job_copy.metadata, pv_str, strlen(pv_str));
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    job_copy.magic_nr = CP_MAGIC_NR;

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    ret = darshan_log_write(file, &job_copy, sizeof(job_copy));
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    if (ret != sizeof(job_copy))
    {
        fprintf(stderr, "Error: failed to write job header: %d\n", ret);
        return(-1);
    }

    return(0);
}

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/* darshan_log_getfile()
 *
 * return 1 if file record found, 0 on eof, and -1 on error
 */
int darshan_log_getfile(darshan_fd fd, struct darshan_job *job, struct darshan_file *file)
{
    int ret;
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    ret = getfile_internal(fd, job, file);

    return(ret);
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}

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/* darshan_log_putfile()
 *
 * return 0 if file record written, -1 on error.
 */
int darshan_log_putfile(darshan_fd fd, struct darshan_job *job, struct darshan_file *file)
{
    int     ret;

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    if(fd->pos < CP_JOB_RECORD_SIZE)
    {
        ret = darshan_log_seek(fd, CP_JOB_RECORD_SIZE);
        if(ret < 0)
            return(ret);
    }
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    ret = darshan_log_write(fd, file, sizeof(*file));
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    if (ret != sizeof(*file))
    {
        fprintf(stderr, "Error: writing file record failed: %d\n", ret);
        return(-1);
    }

    return(0);
}

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/* darshan_log_getmounts()
 * 
 * retrieves mount table information from the log.  Note that devs, mnt_pts,
 * and fs_types are arrays that will be allocated by the function and must
 * be freed by the caller.  count will indicate the size of the arrays
 */
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int darshan_log_getmounts(darshan_fd fd, int64_t** devs, char*** mnt_pts, char***
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    fs_types, int* count)
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{
    int ret;
    char* pos;
    int array_index = 0;
    char buf[CP_EXE_LEN+1];

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    ret = darshan_log_seek(fd, fd->job_struct_size);
    if(ret < 0)
        return(ret);
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    ret = darshan_log_read(fd, buf, (CP_EXE_LEN + 1));
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    if (ret < (CP_EXE_LEN + 1))
    {
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        perror("darshan_log_read");
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        return(-1);
    }

    /* count entries */
    *count = 0;
    pos = buf;
    while((pos = strchr(pos, '\n')) != NULL)
    {
        pos++;
        (*count)++;
    }

    if(*count == 0)
    {
        /* no mount entries present */
        return(0);
    }

    /* allocate output arrays */
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    *devs = malloc((*count)*sizeof(int64_t));
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    assert(*devs);
    *mnt_pts = malloc((*count)*sizeof(char*));
    assert(*mnt_pts);
    *fs_types = malloc((*count)*sizeof(char*));
    assert(*fs_types);
    
    /* work backwards through the table and parse each line (except for
     * first, which holds command line information)
     */
    while((pos = strrchr(buf, '\n')) != NULL)
    {
        /* overestimate string lengths */
        (*mnt_pts)[array_index] = malloc(CP_EXE_LEN);
        assert((*mnt_pts)[array_index]);
        (*fs_types)[array_index] = malloc(CP_EXE_LEN);
        assert((*fs_types)[array_index]);
        
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        ret = sscanf(++pos, "%" PRId64 "\t%s\t%s", &(*devs)[array_index],
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            (*fs_types)[array_index], (*mnt_pts)[array_index]);

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        if(ret != 3)
        {
            fprintf(stderr, "Error: poorly formatted mount table in log file.\n");
            return(-1);
        }
        pos--;
        *pos = '\0';
        array_index++;
    }
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    return (0);
}

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/* darshan_log_putmounts
 *
 * encode mount information back into mtab format.
 *
 * returns 0 on success, -1 on failure.
 */
int darshan_log_putmounts(darshan_fd fd, int64_t* devs, char** mnt_pts, char** fs_types, int count)
{
    int     ret;
    char    line[1024];
    int     i;

    for(i=count-1; i>=0; i--)
    {
        sprintf(line, "\n%" PRId64 "\t%s\t%s",
                devs[i], fs_types[i], mnt_pts[i]);
588
        ret = darshan_log_write(fd, line, strlen(line));
589 590 591 592 593 594
        if (ret != strlen(line))
        {
            fprintf(stderr, "Error: failed to write mount entry: %d\n", ret);
            return(-1);
        }
    }
595 596 597 598 599 600 601 602

    /* seek ahead to end of exe region, will be zero filled */
    ret = darshan_log_seek(fd, CP_JOB_RECORD_SIZE);
    if (ret)
    {
        fprintf(stderr, "Error: forward seek failed: %d\n", CP_JOB_RECORD_SIZE);
    }

603 604
    return(0);
}
605

606
int darshan_log_getexe(darshan_fd fd, char *buf)
607 608
{
    int ret;
609
    char* newline;
610

611 612 613
    ret = darshan_log_seek(fd, fd->job_struct_size);
    if(ret < 0)
        return(ret);
614

615
    ret = darshan_log_read(fd, buf, (CP_EXE_LEN + 1));
616 617
    if (ret < (CP_EXE_LEN + 1))
    {
618
        perror("darshan_log_read");
619 620
        return(-1);
    }
621

622 623 624 625 626 627 628 629
    /* this call is only supposed to return the exe string, but starting in
     * log format 1.23 there could be a table of mount entry information
     * after the exe.  Look for newline character and truncate there.
     */
    newline = strchr(buf, '\n');
    if(newline)
        *newline = '\0';

630 631 632
    return (0);
}

633 634 635 636 637 638 639 640 641 642 643
/* darshan_log_putexe()
 *
 * Write the exe string to the log.
 *
 * return 0 on success, -1 on failure.
 */
int darshan_log_putexe(darshan_fd fd, char *buf)
{
    int     ret;
    int     len;

644 645
    ret = darshan_log_seek(fd, sizeof(struct darshan_job));
    if(ret < 0)
646 647 648 649
        return(ret);

    len = strlen(buf);

650
    ret = darshan_log_write(fd, buf, len);
651 652 653 654 655 656 657 658 659
    if (ret != len)
    {
        fprintf(stderr, "Error: failed to write exe info: %d\n", ret);
        ret = -1;
    }

    return(ret);
}

660
void darshan_log_close(darshan_fd file)
661
{
662 663 664 665 666 667 668 669
#ifdef HAVE_LIBBZ2
    if(file->bzf)
        BZ2_bzclose(file->bzf);
#endif

    if(file->gzf)
        gzclose(file->gzf);

670
    free(file->name);
671
    free(file);
672 673
}

674 675 676 677 678 679
/* darshan_log_print_version_warnings()
 *
 * Print summary of any problems with the detected log format
 */
void darshan_log_print_version_warnings(struct darshan_job *job)
{
680
    if(strcmp(job->version_string, "2.01") == 0)
681 682 683 684
    {
        /* current version */
        return;
    }
685 686 687 688 689 690 691 692

    if(strcmp(job->version_string, "2.00") == 0)
    {
        /* no characterization functionality missing, 
         * just internal darshan metadata 
         */
        return;
    }
693
 
694
    if(strcmp(job->version_string, "1.24") == 0)
695
    {
696 697 698 699 700 701 702 703 704 705
        printf("# WARNING: version 1.24 log format does not support the following parameters:\n");
        printf("#   CP_FASTEST_RANK\n");
        printf("#   CP_FASTEST_RANK_BYTES\n");
        printf("#   CP_SLOWEST_RANK\n");
        printf("#   CP_SLOWEST_RANK_BYTES\n");
        printf("#   CP_F_FASTEST_RANK_TIME\n");
        printf("#   CP_F_SLOWEST_RANK_TIME\n");
        printf("#   CP_F_VARIANCE_RANK_TIME\n");
        printf("#   CP_F_VARIANCE_RANK_BYTES\n");
        printf("# It also does not store the job id in the log file.\n");
706 707
        return;
    }
708
    
709 710
    if(strcmp(job->version_string, "1.23") == 0)
    {
711 712 713 714 715 716 717 718 719 720
        printf("# WARNING: version 1.23 log format does not support the following parameters:\n");
        printf("#   CP_FASTEST_RANK\n");
        printf("#   CP_FASTEST_RANK_BYTES\n");
        printf("#   CP_SLOWEST_RANK\n");
        printf("#   CP_SLOWEST_RANK_BYTES\n");
        printf("#   CP_F_FASTEST_RANK_TIME\n");
        printf("#   CP_F_SLOWEST_RANK_TIME\n");
        printf("#   CP_F_VARIANCE_RANK_TIME\n");
        printf("#   CP_F_VARIANCE_RANK_BYTES\n");
        printf("# It also may have incorrect mount point mappings for files with rank > 0\n");
721
        printf("# It also does not store the job id in the log file.\n");
722
        return;
723 724
    }

725 726 727 728
    if(strcmp(job->version_string, "1.22") == 0)
    {
        printf("# WARNING: version 1.22 log format does not support the following parameters:\n");
        printf("#   CP_DEVICE\n");
729
        printf("#   CP_SIZE_AT_OPEN\n");
730 731 732 733 734 735 736 737
        printf("#   CP_FASTEST_RANK\n");
        printf("#   CP_FASTEST_RANK_BYTES\n");
        printf("#   CP_SLOWEST_RANK\n");
        printf("#   CP_SLOWEST_RANK_BYTES\n");
        printf("#   CP_F_FASTEST_RANK_TIME\n");
        printf("#   CP_F_SLOWEST_RANK_TIME\n");
        printf("#   CP_F_VARIANCE_RANK_TIME\n");
        printf("#   CP_F_VARIANCE_RANK_BYTES\n");
738
        printf("# It does not record mounted file systems, mount points, or fs types.\n");
739 740
        printf("# It attributes syncs to cumulative metadata time, rather than cumulative write time.\n");
        printf("# It also does not store the job id in the log file.\n");
741 742
        return;
    }
743 744 745 746 747 748 749 750 751

    if(strcmp(job->version_string, "1.21") == 0)
    {
        printf("# WARNING: version 1.21 log format does not support the following parameters:\n");
        printf("#   CP_INDEP_NC_OPENS\n");
        printf("#   CP_COLL_NC_OPENS\n");
        printf("#   CP_HDF5_OPENS\n");
        printf("#   CP_MAX_READ_TIME_SIZE\n");
        printf("#   CP_MAX_WRITE_TIME_SIZE\n");
752
        printf("#   CP_DEVICE\n");
753
        printf("#   CP_SIZE_AT_OPEN\n");
754 755
        printf("#   CP_F_MAX_READ_TIME\n");
        printf("#   CP_F_MAX_WRITE_TIME\n");
756 757 758 759 760 761 762 763
        printf("#   CP_FASTEST_RANK\n");
        printf("#   CP_FASTEST_RANK_BYTES\n");
        printf("#   CP_SLOWEST_RANK\n");
        printf("#   CP_SLOWEST_RANK_BYTES\n");
        printf("#   CP_F_FASTEST_RANK_TIME\n");
        printf("#   CP_F_SLOWEST_RANK_TIME\n");
        printf("#   CP_F_VARIANCE_RANK_TIME\n");
        printf("#   CP_F_VARIANCE_RANK_BYTES\n");
764 765
        printf("# It does not record mounted file systems, mount points, or fs types.\n");
        printf("# It attributes syncs to cumulative metadata time, rather than cumulative write time.\n");
766
        printf("#\n");
767
        printf("# It also does not store the job id in the file.\n");
768 769 770 771 772 773 774 775
        return;
    }

    fprintf(stderr, "Error: version %s not supported by parser.\n",
        job->version_string);
    return;
}

776 777 778 779
/* shift_missing_1_21()
 *
 * translates indices to account for counters that weren't present in log
 * format 1.21
780
 */
781
/*******************************
782
 * version 1.21 to 2.00 differences 
783 784 785 786 787 788 789 790
 * - added:
 *   - CP_INDEP_NC_OPENS
 *   - CP_COLL_NC_OPENS
 *   - CP_HDF5_OPENS
 *   - CP_MAX_READ_TIME_SIZE
 *   - CP_MAX_WRITE_TIME_SIZE
 *   - CP_DEVICE
 *   - CP_SIZE_AT_OPEN
791 792 793 794
 *   - CP_FASTEST_RANK
 *   - CP_FASTEST_RANK_BYTES
 *   - CP_SLOWEST_RANK
 *   - CP_SLOWEST_RANK_BYTES
795 796
 *   - CP_F_MAX_READ_TIME
 *   - CP_F_MAX_WRITE_TIME
797 798 799 800
 *   - CP_F_FASTEST_RANK_TIME
 *   - CP_F_SLOWEST_RANK_TIME
 *   - CP_F_VARIANCE_RANK_TIME
 *   - CP_F_VARIANCE_RANK_BYTES
801
 * - changed params:
802 803 804
 *   - CP_FILE_RECORD_SIZE: 1184 to 1328
 *   - CP_NUM_INDICES: 133 to 144
 *   - CP_F_NUM_INDICES: 12 to 18
805
 */
806 807 808 809 810 811 812 813 814
static void shift_missing_1_21(struct darshan_file* file)
{
    int c_index = 0;
    int missing_counters[] = {
        CP_INDEP_NC_OPENS,
        CP_COLL_NC_OPENS,
        CP_HDF5_OPENS,
        CP_MAX_READ_TIME_SIZE,
        CP_MAX_WRITE_TIME_SIZE,
815
        CP_DEVICE,
816
        CP_SIZE_AT_OPEN,
817 818 819 820
        CP_FASTEST_RANK,
        CP_FASTEST_RANK_BYTES,
        CP_SLOWEST_RANK,
        CP_SLOWEST_RANK_BYTES,
821 822 823 824
        -1};
    int missing_f_counters[] = {
        CP_F_MAX_READ_TIME,
        CP_F_MAX_WRITE_TIME,
825 826 827 828
        CP_F_FASTEST_RANK_TIME,
        CP_F_SLOWEST_RANK_TIME,
        CP_F_VARIANCE_RANK_TIME,
        CP_F_VARIANCE_RANK_BYTES,
829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864
        -1};

    c_index = 0;
    while(missing_counters[c_index] != -1)
    {
        int missing_counter = missing_counters[c_index];
        c_index++;
        if(missing_counter < (CP_NUM_INDICES - 1))
        {
            /* shift down */
            memmove(&file->counters[missing_counter+1],
                &file->counters[missing_counter],
                (CP_NUM_INDICES-missing_counter-1)*sizeof(int64_t));
        }
        /* zero out missing counter */
        file->counters[missing_counter] = 0;
    }

    c_index = 0;
    while(missing_f_counters[c_index] != -1)
    {
        int missing_counter = missing_f_counters[c_index];
        c_index++;
        if(missing_counter < (CP_F_NUM_INDICES - 1))
        {
            /* shift down */
            memmove(&file->fcounters[missing_counter+1],
                &file->fcounters[missing_counter],
                (CP_F_NUM_INDICES-missing_counter-1)*sizeof(double));
        }
        /* zero out missing counter */
        file->fcounters[missing_counter] = 0;
    }

    return;
}
865 866 867 868 869 870

/* shift_missing_1_22()
 *
 * translates indices to account for counters that weren't present in log
 * format 1.22
 */
871
/*******************************
872
 * version 1.22 to 2.00 differences
873 874 875 876
 *
 * - added:
 *   - CP_DEVICE
 *   - CP_SIZE_AT_OPEN
877 878 879 880 881 882 883 884
 *   - CP_FASTEST_RANK
 *   - CP_FASTEST_RANK_BYTES
 *   - CP_SLOWEST_RANK
 *   - CP_SLOWEST_RANK_BYTES
 *   - CP_F_FASTEST_RANK_TIME
 *   - CP_F_SLOWEST_RANK_TIME
 *   - CP_F_VARIANCE_RANK_TIME
 *   - CP_F_VARIANCE_RANK_BYTES
885
 * - changed params:
886 887 888
 *   - CP_FILE_RECORD_SIZE: 1240 to 1328
 *   - CP_NUM_INDICES: 138 to 144
 *   - CP_F_NUM_INDICES: 14 to 18
889
 */
890 891 892 893 894
static void shift_missing_1_22(struct darshan_file* file)
{
    int c_index = 0;
    int missing_counters[] = {
        CP_DEVICE,
895
        CP_SIZE_AT_OPEN,
896 897 898 899 900 901 902 903 904 905
        CP_FASTEST_RANK,
        CP_FASTEST_RANK_BYTES,
        CP_SLOWEST_RANK,
        CP_SLOWEST_RANK_BYTES,
        -1};
    int missing_f_counters[] = {
        CP_F_FASTEST_RANK_TIME,
        CP_F_SLOWEST_RANK_TIME,
        CP_F_VARIANCE_RANK_TIME,
        CP_F_VARIANCE_RANK_BYTES,
906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923
        -1};

    c_index = 0;
    while(missing_counters[c_index] != -1)
    {
        int missing_counter = missing_counters[c_index];
        c_index++;
        if(missing_counter < (CP_NUM_INDICES - 1))
        {
            /* shift down */
            memmove(&file->counters[missing_counter+1],
                &file->counters[missing_counter],
                (CP_NUM_INDICES-missing_counter-1)*sizeof(int64_t));
        }
        /* zero out missing counter */
        file->counters[missing_counter] = 0;
    }

924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939
    c_index = 0;
    while(missing_f_counters[c_index] != -1)
    {
        int missing_counter = missing_f_counters[c_index];
        c_index++;
        if(missing_counter < (CP_F_NUM_INDICES - 1))
        {
            /* shift down */
            memmove(&file->fcounters[missing_counter+1],
                &file->fcounters[missing_counter],
                (CP_F_NUM_INDICES-missing_counter-1)*sizeof(double));
        }
        /* zero out missing counter */
        file->fcounters[missing_counter] = 0;
    }

940 941
    return;
}
942

943 944 945 946 947 948 949 950 951
/* shift_missing_1_24()
 *
 * translates indices to account for counters that weren't present in log
 * format 1.24
 */
/*******************************
 * version 1.24 to 2.00 differences
 *
 * - added:
952 953 954 955
 *   - CP_FASTEST_RANK
 *   - CP_FASTEST_RANK_BYTES
 *   - CP_SLOWEST_RANK
 *   - CP_SLOWEST_RANK_BYTES
956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015
 *   - CP_F_FASTEST_RANK_TIME
 *   - CP_F_SLOWEST_RANK_TIME
 *   - CP_F_VARIANCE_RANK_TIME
 *   - CP_F_VARIANCE_RANK_BYTES
 * - changed params:
 *   - CP_FILE_RECORD_SIZE: ? to 1328
 *   - CP_NUM_INDICES: 140 to 144
 *   - CP_F_NUM_INDICES: 14 to 18
 */
static void shift_missing_1_24(struct darshan_file* file)
{
    int c_index = 0;
    int missing_counters[] = {
        CP_FASTEST_RANK,
        CP_FASTEST_RANK_BYTES,
        CP_SLOWEST_RANK,
        CP_SLOWEST_RANK_BYTES,
        -1};
    int missing_f_counters[] = {
        CP_F_FASTEST_RANK_TIME,
        CP_F_SLOWEST_RANK_TIME,
        CP_F_VARIANCE_RANK_TIME,
        CP_F_VARIANCE_RANK_BYTES,
        -1};

    c_index = 0;
    while(missing_counters[c_index] != -1)
    {
        int missing_counter = missing_counters[c_index];
        c_index++;
        if(missing_counter < (CP_NUM_INDICES - 1))
        {
            /* shift down */
            memmove(&file->counters[missing_counter+1],
                &file->counters[missing_counter],
                (CP_NUM_INDICES-missing_counter-1)*sizeof(int64_t));
        }
        /* zero out missing counter */
        file->counters[missing_counter] = 0;
    }

    c_index = 0;
    while(missing_f_counters[c_index] != -1)
    {
        int missing_counter = missing_f_counters[c_index];
        c_index++;
        if(missing_counter < (CP_F_NUM_INDICES - 1))
        {
            /* shift down */
            memmove(&file->fcounters[missing_counter+1],
                &file->fcounters[missing_counter],
                (CP_F_NUM_INDICES-missing_counter-1)*sizeof(double));
        }
        /* zero out missing counter */
        file->fcounters[missing_counter] = 0;
    }

    return;
}

1016
static int getjob_internal_201(darshan_fd file, struct darshan_job *job)
1017 1018 1019
{
    int ret;

1020 1021 1022
    ret = darshan_log_seek(file, 0);
    if(ret < 0)
        return(ret);
1023

1024
    ret = darshan_log_read(file, job, sizeof(*job));
1025 1026
    if (ret < sizeof(*job))
    {
1027
        fprintf(stderr, "Error: invalid log file (too short).\n");
1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046
        return(-1);
    }

    if(job->magic_nr == CP_MAGIC_NR)
    {
        /* no byte swapping needed, this file is in host format already */
        file->swap_flag = 0;
        return(0);
    }

    /* try byte swapping */
    DARSHAN_BSWAP64(&job->magic_nr);
    if(job->magic_nr == CP_MAGIC_NR)
    {
        file->swap_flag = 1;
        DARSHAN_BSWAP64(&job->uid);
        DARSHAN_BSWAP64(&job->start_time);
        DARSHAN_BSWAP64(&job->end_time);
        DARSHAN_BSWAP64(&job->nprocs);
1047
        DARSHAN_BSWAP64(&job->jobid);
1048 1049 1050 1051 1052 1053 1054 1055
        return(0);
    }

    /* otherwise this file is just broken */
    fprintf(stderr, "Error: bad magic number in darshan file.\n");
    return(-1);
}

1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073

static int getjob_internal_200(darshan_fd file, struct darshan_job *job)
{
    int ret;
    struct darshan_job_200
    {
        char version_string[8];
        int64_t magic_nr;
        int64_t uid;
        int64_t start_time;
        int64_t end_time;
        int64_t nprocs;
        int64_t jobid;
    } job_200;

    memset(job, 0, sizeof(job_200));
    memset(job, 0, sizeof(*job));

1074 1075 1076
    ret = darshan_log_seek(file, 0);
    if(ret < 0)
        return(ret);
1077

1078
    ret = darshan_log_read(file, &job_200, sizeof(job_200));
1079 1080
    if (ret < sizeof(job_200))
    {
1081
        fprintf(stderr, "Error: invalid log file (too short).\n");
1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117
        return(-1);
    }

    memcpy(job->version_string, job_200.version_string, 8);
    job->magic_nr   = job_200.magic_nr;
    job->uid        = job_200.uid;
    job->start_time = job_200.start_time;
    job->end_time   = job_200.end_time;
    job->nprocs     = job_200.nprocs;
    job->jobid      = job_200.jobid;

    if(job->magic_nr == CP_MAGIC_NR)
    {
        /* no byte swapping needed, this file is in host format already */
        file->swap_flag = 0;
        return(0);
    }

    /* try byte swapping */
    DARSHAN_BSWAP64(&job->magic_nr);
    if(job->magic_nr == CP_MAGIC_NR)
    {
        file->swap_flag = 1;
        DARSHAN_BSWAP64(&job->uid);
        DARSHAN_BSWAP64(&job->start_time);
        DARSHAN_BSWAP64(&job->end_time);
        DARSHAN_BSWAP64(&job->nprocs);
        DARSHAN_BSWAP64(&job->jobid);
        return(0);
    }

    /* otherwise this file is just broken */
    fprintf(stderr, "Error: bad magic number in darshan file.\n");
    return(-1);
}

1118 1119 1120 1121 1122 1123
static int getfile_internal_200(darshan_fd fd, struct darshan_job *job, 
    struct darshan_file *file)
{
    int ret;
    const char* err_string;
    int i;
1124

1125 1126 1127 1128 1129 1130
    if(fd->pos < CP_JOB_RECORD_SIZE)
    {
        ret = darshan_log_seek(fd, CP_JOB_RECORD_SIZE);
        if(ret < 0)
            return(ret);
    }
1131 1132 1133 1134 1135 1136

    /* reset file record, so that diff compares against a zero'd out record
     * if file is missing
     */
    memset(file, 0, sizeof(&file));

1137
    ret = darshan_log_read(fd, file, sizeof(*file));
1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161
    if(ret == sizeof(*file))
    {
        /* got exactly one, correct size record */
        if(fd->swap_flag)
        {
            /* swap bytes if necessary */
            DARSHAN_BSWAP64(&file->hash);
            DARSHAN_BSWAP64(&file->rank);
            for(i=0; i<CP_NUM_INDICES; i++)
                DARSHAN_BSWAP64(&file->counters[i]);
            for(i=0; i<CP_F_NUM_INDICES; i++)
                DARSHAN_BSWAP64(&file->fcounters[i]);
        }
        return(1);
    }


    if(ret > 0)
    {
        /* got a short read */
        fprintf(stderr, "Error: invalid file record (too small)\n");
        return(-1);
    }

1162
    if(ret == 0)
1163 1164 1165 1166 1167 1168
    {
        /* hit end of file */
        return(0);
    }

    /* all other errors */
1169
    err_string = darshan_log_error(fd, &ret);
1170 1171 1172 1173
    fprintf(stderr, "Error: %s\n", err_string);
    return(-1);
}

1174 1175 1176
/* If we see version 1.24, assume that it is stored in big endian 32 bit
 * format.  Convert up to current format.
 */
1177 1178
static int getjob_internal_124(darshan_fd fd, struct darshan_job *job)
{
1179 1180 1181 1182 1183 1184 1185
    char* buffer;
    int ret;
    uint32_t uid;
    int32_t start_time;
    int32_t end_time;
    int32_t nprocs;

1186 1187 1188 1189 1190 1191
#ifdef WORDS_BIGENDIAN
    fd->swap_flag = 0;
#else
    fd->swap_flag = 1;
#endif

1192 1193 1194 1195 1196 1197 1198 1199
    memset(job, 0, sizeof(*job));

    buffer = (char*)malloc(JOB_SIZE_124);
    if(!buffer)
    {
        return(-1);
    }

1200 1201 1202
    ret = darshan_log_seek(fd, 0);
    if(ret < 0)
        return(ret);
1203

1204
    ret = darshan_log_read(fd, buffer, JOB_SIZE_124);
1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222
    if (ret < JOB_SIZE_124)
    {
        fprintf(stderr, "Error: invalid log file (could not read file record).\n");
        free(buffer);
        return(-1);
    }

    /* pull job header information out of specific bytes in case struct
     * padding is off
     */
    strncpy(job->version_string, buffer, 8);
    uid = *((uint32_t*)&buffer[12]);
    start_time = *((int32_t*)&buffer[16]);
    end_time = *((int32_t*)&buffer[20]);
    nprocs = *((int32_t*)&buffer[24]);

    free(buffer);

1223 1224 1225 1226 1227 1228 1229 1230
    if(fd->swap_flag)
    {
        /* byte swap */
        DARSHAN_BSWAP32(&uid);
        DARSHAN_BSWAP32(&start_time);
        DARSHAN_BSWAP32(&end_time);
        DARSHAN_BSWAP32(&nprocs);
    }
1231 1232 1233 1234 1235

    job->uid += uid;
    job->start_time += start_time;
    job->end_time += end_time;
    job->nprocs += nprocs;
1236
    job->jobid = 0; /* old log versions did not have this field */
1237 1238 1239 1240 1241
    
    /* set magic number */
    job->magic_nr = CP_MAGIC_NR;

    return(0);
1242 1243 1244 1245
}

static int getfile_internal_124(darshan_fd fd, struct darshan_job *job, 
    struct darshan_file *file)
1246
{
1247 1248
    int ret;

1249
    ret = getfile_internal_1x(fd, job, file, 140, 14);
1250 1251 1252 1253 1254 1255
    if(ret <= 0)
        return(ret);

    shift_missing_1_24(file);

    return(1);
1256 1257 1258 1259 1260 1261 1262
}

static int getfile_internal_122(darshan_fd fd, struct darshan_job *job, 
    struct darshan_file *file)
{
    int ret;

1263 1264
    ret = getfile_internal_1x(fd, job, file, 138, 14);
    if(ret <= 0)
1265 1266 1267 1268
        return(ret);

    shift_missing_1_22(file);

1269
    return(1);
1270 1271 1272 1273 1274 1275 1276
}

static int getfile_internal_121(darshan_fd fd, struct darshan_job *job, 
    struct darshan_file *file)
{
    int ret;

1277 1278
    ret = getfile_internal_1x(fd, job, file, 133, 12);
    if(ret <= 0)
1279 1280 1281 1282
        return(ret);

    shift_missing_1_21(file);

1283
    return(1);
1284 1285 1286 1287
}

static int getfile_internal_1x(darshan_fd fd, struct darshan_job *job, 
    struct darshan_file *file, int n_counters, int n_fcounters)
1288
{
1289 1290 1291 1292 1293 1294 1295 1296 1297
    char* buffer;
    int ret;
    const char* err_string;
    int i;
    uint64_t hash;
    int32_t rank;
    int64_t* counters;
    double* fcounters;
    char* name_suffix;
1298
    int FILE_SIZE_1x = (32 + n_counters*8 + n_fcounters*8);
1299

1300 1301 1302 1303 1304
    memset(file, 0, sizeof(*file));

    /* set file pointer if this is the first file record; otherwise pick up
     * where we left off last time
     */
1305 1306 1307 1308 1309 1310 1311
    if(fd->pos < CP_JOB_RECORD_SIZE)
    {
        ret = darshan_log_seek(fd, CP_JOB_RECORD_SIZE);
        if(ret < 0)
            return(ret);
    }
    
1312
    /* space for file struct, int64 array, and double array */
1313
    buffer = (char*)malloc(FILE_SIZE_1x);
1314 1315 1316 1317 1318
    if(!buffer)
    {
        return(-1);
    }

1319
    ret = darshan_log_read(fd, buffer, FILE_SIZE_1x);
1320

1321
    if(ret > 0 && ret < FILE_SIZE_1x)
1322 1323 1324 1325 1326 1327
    {
        /* got a short read */
        fprintf(stderr, "Error: invalid file record (too small)\n");
        free(buffer);
        return(-1);
    }
1328
    else if(ret == 0)
1329 1330 1331 1332 1333 1334 1335 1336
    {
        /* hit end of file */
        free(buffer);
        return(0);
    }
    else if(ret <= 0)
    {
        /* all other errors */
1337
        err_string = darshan_log_error(fd, &ret);
1338 1339 1340 1341 1342 1343 1344 1345 1346
        fprintf(stderr, "Error: %s\n", err_string);
        free(buffer);
        return(-1);
    }

    /* got exactly one, correct size record */
    hash = *((int64_t*)&buffer[0]);
    rank = *((int32_t*)&buffer[8]);
    counters = ((int64_t*)&buffer[16]);
1347 1348
    fcounters = ((double*)&buffer[16 + n_counters*8]);
    name_suffix = &buffer[16 + n_counters*8 + n_fcounters*8];
1349 1350 1351 1352 1353 1354 1355


    if(fd->swap_flag)
    {
        /* swap bytes if necessary */
        DARSHAN_BSWAP64(&hash);
        DARSHAN_BSWAP32(&rank);
1356
        for(i=0; i<n_counters; i++)
1357
            DARSHAN_BSWAP64(&counters[i]);
1358
        for(i=0; i<n_fcounters; i++)
1359 1360 1361 1362 1363 1364
            DARSHAN_BSWAP64(&fcounters[i]);
    }

    /* assign into new format */
    file->hash = hash;
    file->rank += rank;
1365 1366
    memcpy(file->counters, counters, n_counters*8);
    memcpy(file->fcounters, fcounters, n_fcounters*8);
1367 1368 1369 1370
    memcpy(file->name_suffix, name_suffix, 12);

    free(buffer);
    return(1);
1371 1372
}

1373 1374 1375 1376 1377 1378 1379 1380
/* return amount written on success, -1 on failure.
 */
static int darshan_log_write(darshan_fd fd, void* buf, int len)
{
    int ret;

    if(fd->gzf)
    {
1381
        ret = gzwrite(fd->gzf, buf, len);
1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400
        if(ret > 0)
            fd->pos += ret;
        return(ret);
    }

#ifdef HAVE_LIBBZ2
    if(fd->bzf)
    {
        ret = BZ2_bzwrite(fd->bzf, buf, len);
        if(ret > 0)
            fd->pos += ret;
        return(ret);
    }
#endif

    return(-1);
}


1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479
/* return amount read on success, 0 on EOF, -1 on failure.
 */
static int darshan_log_read(darshan_fd fd, void* buf, int len)
{
    int ret;

    if(fd->gzf)
    {
        ret = gzread(fd->gzf, buf, len);
        if(ret > 0)
            fd->pos += ret;
        return(ret);
    }

#ifdef HAVE_LIBBZ2
    if(fd->bzf)
    {
        ret = BZ2_bzread(fd->bzf, buf, len);
        if(ret > 0)
            fd->pos += ret;
        return(ret);
    }
#endif

    return(-1);
}


static const char* darshan_log_error(darshan_fd fd, int* errnum)
{
    if(fd->gzf)
    {
        return(gzerror(fd->gzf, errnum));
    }

#ifdef HAVE_LIBBZ2
    if(fd->bzf)
    {
        return(BZ2_bzerror(fd->bzf, errnum));
    }
#endif

    *errnum = 0;
    return(NULL);
}

/* return 0 on successful seek to offset, -1 on failure.
 */
static int darshan_log_seek(darshan_fd fd, int64_t offset)
{
    z_off_t zoff = 0;
    z_off_t zoff_ret = 0;

    if(fd->pos == offset)
        return(0);

    if(fd->gzf)
    {
        zoff += offset;
        zoff_ret = gzseek(fd->gzf, zoff, SEEK_SET);
        if(zoff_ret == zoff)
        {
            fd->pos = offset;
            return(0);
        }
        return(-1);
    }

#ifdef HAVE_LIBBZ2
    if(fd->bzf)
    {
        int64_t counter;
        char dummy = '\0';
        int ret;

        /* There is no seek in bzip2.  Just close, reopen, and throw away 
         * data until the correct offset.  Very slow, but we don't expect to
         * do this often.
         */
1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498
        if(fd->mode[0] == 'r' && offset < fd->pos)
        {
            /* to seek backwards in read-only mode we just close and re-open
             * the file
             */
            BZ2_bzclose(fd->bzf);
            fd->bzf = BZ2_bzopen(fd->name, fd->mode);
            if(!fd->bzf)
                return(-1);

            fd->pos = 0;
        }
        else if(fd->mode[0] == 'w' && offset < fd->pos)
        {
            /* there isn't any convenient way to seek backwards in a
             * write-only bzip2 file, but we shouldn't need that
             * functionality in darshan anyway.
             */
            fprintf(stderr, "Error: seeking backwards in a bzip2 compressed darshan output file is not supported.\n");
1499
            return(-1);
1500
        }
1501

1502
        for(counter=0; counter<(offset-fd->pos); counter++)
1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514
        {
            if(fd->mode[0] == 'r')
            {
                ret = BZ2_bzread(fd->bzf, &dummy, 1);
            }
            else
            {
                ret = BZ2_bzwrite(fd->bzf, &dummy, 1);
            }
            if(ret != 1)
                return(-1);
        }
1515
        fd->pos += counter;
1516 1517 1518 1519 1520 1521 1522
        return(0);
    }
#endif

    return(-1);
}