darshan-stdio.c 33.7 KB
Newer Older
1 2 3 4 5 6
/*
 * Copyright (C) 2015 University of Chicago.
 * See COPYRIGHT notice in top-level directory.
 *
 */

7 8 9
/* TODO list (general) for this module:
 * - implement reduction operator
 * - add stdio page to darshan-job-summary
Philip Carns's avatar
Philip Carns committed
10 11
 * - add regression test cases for all functions captured here
 *   - especially the scanf and printf variants with variable arguments
12 13
 * - figure out what to do about posix module compatibility
 *   - remove stdio counters in POSIX or keep and set to -1?
Philip Carns's avatar
Philip Carns committed
14 15 16 17 18
 *   - affected counters in posix module:
 *     - POSIX_FOPENS
 *     - POSIX_FREADS
 *     - POSIX_FWRITES
 *     - POSIX_FSEEKS
19 20
 */

Philip Carns's avatar
Philip Carns committed
21 22 23 24 25
/* catalog of stdio functions instrumented by this module
 *
 * functions for opening streams
 * --------------
 * FILE    *fdopen(int, const char *);                      DONE
Philip Carns's avatar
Philip Carns committed
26
 * FILE    *fopen(const char *, const char *);              DONE
Philip Carns's avatar
Philip Carns committed
27
 * FILE    *fopen64(const char *, const char *);            DONE
Philip Carns's avatar
Philip Carns committed
28
 * FILE    *freopen(const char *, const char *, FILE *);    DONE
Philip Carns's avatar
Philip Carns committed
29
 * FILE    *freopen64(const char *, const char *, FILE *);  DONE
Philip Carns's avatar
Philip Carns committed
30 31 32 33 34 35 36
 *
 * functions for closing streams
 * --------------
 * int      fclose(FILE *);                                 DONE
 *
 * functions for flushing streams
 * --------------
Philip Carns's avatar
Philip Carns committed
37
 * int      fflush(FILE *);                                 DONE
Philip Carns's avatar
Philip Carns committed
38 39 40
 *
 * functions for reading data
 * --------------
Philip Carns's avatar
Philip Carns committed
41
 * int      fgetc(FILE *);                                  DONE
Philip Carns's avatar
Philip Carns committed
42
 * char    *fgets(char *, int, FILE *);                     DONE
Philip Carns's avatar
Philip Carns committed
43
 * size_t   fread(void *, size_t, size_t, FILE *);          DONE
44 45
 * int      fscanf(FILE *, const char *, ...);              DONE
 * int      vfscanf(FILE *, const char *, va_list);         DONE
Philip Carns's avatar
Philip Carns committed
46
 * int      getc(FILE *);                                   DONE
Philip Carns's avatar
Philip Carns committed
47
 * int      getw(FILE *);                                   DONE
Philip Carns's avatar
Philip Carns committed
48 49 50
 *
 * functions for writing data
 * --------------
Philip Carns's avatar
Philip Carns committed
51 52
 * int      fprintf(FILE *, const char *, ...);             DONE
 * int      vfprintf(FILE *, const char *, va_list);        DONE
Philip Carns's avatar
Philip Carns committed
53
 * int      fputc(int, FILE *);                             DONE
Philip Carns's avatar
Philip Carns committed
54
 * int      fputs(const char *, FILE *);                    DONE
Philip Carns's avatar
Philip Carns committed
55
 * size_t   fwrite(const void *, size_t, size_t, FILE *);   DONE
Philip Carns's avatar
Philip Carns committed
56
 * int      putc(int, FILE *);                              DONE
Philip Carns's avatar
Philip Carns committed
57
 * int      putw(int, FILE *);                              DONE
Philip Carns's avatar
Philip Carns committed
58 59 60 61
 *
 * functions for changing file position
 * --------------
 * int      fseek(FILE *, long int, int);                   DONE
62
 * int      fseeko(FILE *, off_t, int);                     DONE
Philip Carns's avatar
Philip Carns committed
63
 * int      fseeko64(FILE *, off_t, int);                   DONE
64 65
 * int      fsetpos(FILE *, const fpos_t *);                DONE
 * int      fsetpos64(FILE *, const fpos_t *);              DONE
Philip Carns's avatar
Philip Carns committed
66
 * void     rewind(FILE *);                                 DONE
67
 *
68 69 70 71 72
 * Omissions: 
 *   - _unlocked() variants of the various flush, read, and write
 *     functions.  There are many of these, but they are not available on all
 *     systems and the man page advises not to use them.
 *   - ungetc()
Philip Carns's avatar
Philip Carns committed
73 74
 */

75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103
#define _XOPEN_SOURCE 500
#define _GNU_SOURCE

#include "darshan-runtime-config.h"
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdarg.h>
#include <string.h>
#include <time.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/uio.h>
#include <sys/mman.h>
#include <search.h>
#include <assert.h>
#include <libgen.h>
#include <pthread.h>

#include "uthash.h"
#include "utlist.h"

#include "darshan.h"
#include "darshan-dynamic.h"

DARSHAN_FORWARD_DECL(fopen, FILE*, (const char *path, const char *mode));
DARSHAN_FORWARD_DECL(fopen64, FILE*, (const char *path, const char *mode));
Philip Carns's avatar
Philip Carns committed
104
DARSHAN_FORWARD_DECL(fdopen, FILE*, (int fd, const char *mode));
Philip Carns's avatar
Philip Carns committed
105
DARSHAN_FORWARD_DECL(freopen, FILE*, (const char *path, const char *mode, FILE *stream));
Philip Carns's avatar
Philip Carns committed
106
DARSHAN_FORWARD_DECL(freopen64, FILE*, (const char *path, const char *mode, FILE *stream));
107
DARSHAN_FORWARD_DECL(fclose, int, (FILE *fp));
Philip Carns's avatar
Philip Carns committed
108
DARSHAN_FORWARD_DECL(fflush, int, (FILE *fp));
109
DARSHAN_FORWARD_DECL(fwrite, size_t, (const void *ptr, size_t size, size_t nmemb, FILE *stream));
Philip Carns's avatar
Philip Carns committed
110
DARSHAN_FORWARD_DECL(fputc, int, (int c, FILE *stream));
Philip Carns's avatar
Philip Carns committed
111
DARSHAN_FORWARD_DECL(putw, int, (int w, FILE *stream));
Philip Carns's avatar
Philip Carns committed
112
DARSHAN_FORWARD_DECL(fputs, int, (const char *s, FILE *stream));
Philip Carns's avatar
Philip Carns committed
113 114
DARSHAN_FORWARD_DECL(fprintf, int, (FILE *stream, const char *format, ...));
DARSHAN_FORWARD_DECL(vfprintf, int, (FILE *stream, const char *format, va_list));
115
DARSHAN_FORWARD_DECL(fread, size_t, (void *ptr, size_t size, size_t nmemb, FILE *stream));
Philip Carns's avatar
Philip Carns committed
116
DARSHAN_FORWARD_DECL(fgetc, int, (FILE *stream));
Philip Carns's avatar
Philip Carns committed
117
DARSHAN_FORWARD_DECL(getw, int, (FILE *stream));
Philip Carns's avatar
Philip Carns committed
118
DARSHAN_FORWARD_DECL(_IO_getc, int, (FILE *stream));
Philip Carns's avatar
Philip Carns committed
119
DARSHAN_FORWARD_DECL(_IO_putc, int, (int, FILE *stream));
120 121
DARSHAN_FORWARD_DECL(fscanf, int, (FILE *stream, const char *format, ...));
DARSHAN_FORWARD_DECL(vfscanf, int, (FILE *stream, const char *format, va_list ap));
Philip Carns's avatar
Philip Carns committed
122
DARSHAN_FORWARD_DECL(fgets, char*, (char *s, int size, FILE *stream));
123
DARSHAN_FORWARD_DECL(fseek, int, (FILE *stream, long offset, int whence));
Philip Carns's avatar
Philip Carns committed
124
DARSHAN_FORWARD_DECL(fseeko, int, (FILE *stream, off_t offset, int whence));
Philip Carns's avatar
Philip Carns committed
125
DARSHAN_FORWARD_DECL(fseeko64, int, (FILE *stream, off_t offset, int whence));
126 127
DARSHAN_FORWARD_DECL(fsetpos, int, (FILE *stream, const fpos_t *pos));
DARSHAN_FORWARD_DECL(fsetpos64, int, (FILE *stream, const fpos_t *pos));
Philip Carns's avatar
Philip Carns committed
128
DARSHAN_FORWARD_DECL(rewind, void, (FILE *stream));
129 130

/* The stdio_file_runtime structure maintains necessary runtime metadata
131
 * for the STDIO file record (darshan_stdio_record structure, defined in
132 133 134 135 136 137 138 139
 * darshan-stdio-log-format.h) pointed to by 'file_record'. This metadata
 * assists with the instrumenting of specific statistics in the file record.
 * 'hlink' is a hash table link structure used to add/remove this record
 * from the hash table of STDIO file records for this process. 
 *
 * RATIONALE: the STDIO module needs to track some stateful, volatile 
 * information about each open file (like the current file offset, most recent 
 * access time, etc.) to aid in instrumentation, but this information can't be
140
 * stored in the darshan_stdio_record struct because we don't want it to appear in
141
 * the final darshan log file.  We therefore associate a stdio_file_runtime
142
 * struct with each darshan_stdio_record struct in order to track this information.
143 144
  *
 * NOTE: There is a one-to-one mapping of stdio_file_runtime structs to
145
 * darshan_stdio_record structs.
146
 *
147
 * NOTE: The stdio_file_runtime struct contains a pointer to a darshan_stdio_record
148
 * struct (see the *file_record member) rather than simply embedding an entire
149
 * darshan_stdio_record struct.  This is done so that all of the darshan_stdio_record
150 151 152 153 154
 * structs can be kept contiguous in memory as a single array to simplify
 * reduction, compression, and storage.
 */
struct stdio_file_runtime
{
155
    struct darshan_stdio_record* file_record;
156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199
    int64_t offset;
    double last_meta_end;
    double last_read_end;
    double last_write_end;
    UT_hash_handle hlink;
};

/* The stdio_file_runtime_ref structure is used to associate a STDIO
 * stream with an already existing STDIO file record. This is
 * necessary as many STDIO I/O functions take only an input stream,
 * but STDIO file records are indexed by their full file paths (i.e., darshan
 * record identifiers for STDIO files are created by hashing the file path).
 * In other words, this structure is necessary as it allows us to look up a
 * file record either by a pathname (stdio_file_runtime) or by STDIO stream 
 * (stdio_file_runtime_ref), depending on which parameters are
 * available. This structure includes another hash table link, since separate
 * hashes are maintained for stdio_file_runtime structures and stdio_file_runtime_ref
 * structures.
 *
 * RATIONALE: In theory the FILE* information could be included in the
 * stdio_file_runtime struct rather than in a separate structure here.  The
 * reason we don't do that is because the same file could be opened multiple
 * times by a given process with different stream pointers and thus
 * simulataneously referenced using different stream pointers.  This practice is
 * not common, but we must support it.
 *
 * NOTE: there are potentially multiple stdio_file_runtime_ref structures
 * referring to a single stdio_file_runtime structure.  Most of the time there is
 * only one, however.
 */
struct stdio_file_runtime_ref
{
    struct stdio_file_runtime* file;
    FILE* stream;
    UT_hash_handle hlink;
};

/* The stdio_runtime structure maintains necessary state for storing
 * STDIO file records and for coordinating with darshan-core at 
 * shutdown time.
 */
struct stdio_runtime
{
    struct stdio_file_runtime* file_runtime_array;
200
    struct darshan_stdio_record* file_record_array;
201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226
    int file_array_size;
    int file_array_ndx;
    struct stdio_file_runtime* file_hash;
    struct stdio_file_runtime_ref* stream_hash;
};

static struct stdio_runtime *stdio_runtime = NULL;
static pthread_mutex_t stdio_runtime_mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
static int instrumentation_disabled = 0;
static int darshan_mem_alignment = 1;
static int my_rank = -1;

static void stdio_runtime_initialize(void);
static struct stdio_file_runtime* stdio_file_by_name(const char *name);
static struct stdio_file_runtime* stdio_file_by_name_setstream(const char* name, FILE *stream);
static struct stdio_file_runtime* stdio_file_by_stream(FILE* stream);
static void stdio_file_close_stream(FILE *stream);

static void stdio_begin_shutdown(void);
static void stdio_get_output_data(MPI_Comm mod_comm, darshan_record_id *shared_recs,
    int shared_rec_count, void **stdio_buf, int *stdio_buf_sz);
static void stdio_shutdown(void);

#define STDIO_LOCK() pthread_mutex_lock(&stdio_runtime_mutex)
#define STDIO_UNLOCK() pthread_mutex_unlock(&stdio_runtime_mutex)

227 228 229 230 231 232 233 234 235 236 237 238 239 240
#define STDIO_RECORD_OPEN(__ret, __path, __tm1, __tm2) do { \
    struct stdio_file_runtime* file; \
    char* exclude; \
    int tmp_index = 0; \
    if(__ret == NULL) break; \
    while((exclude = darshan_path_exclusions[tmp_index])) { \
        if(!(strncmp(exclude, __path, strlen(exclude)))) \
            break; \
        tmp_index++; \
    } \
    if(exclude) break; \
    file = stdio_file_by_name_setstream(__path, __ret); \
    if(!file) break; \
    file->offset = 0; \
241
    file->file_record->counters[STDIO_OPENS] += 1; \
242 243 244 245 246 247 248 249
    if(file->file_record->fcounters[STDIO_F_OPEN_START_TIMESTAMP] == 0 || \
     file->file_record->fcounters[STDIO_F_OPEN_START_TIMESTAMP] > __tm1) \
        file->file_record->fcounters[STDIO_F_OPEN_START_TIMESTAMP] = __tm1; \
    file->file_record->fcounters[STDIO_F_OPEN_END_TIMESTAMP] = __tm2; \
    DARSHAN_TIMER_INC_NO_OVERLAP(file->file_record->fcounters[STDIO_F_META_TIME], __tm1, __tm2, file->last_meta_end); \
} while(0)


250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267
#define STDIO_RECORD_READ(__fp, __bytes,  __tm1, __tm2) do{ \
    int64_t this_offset; \
    struct stdio_file_runtime* file; \
    file = stdio_file_by_stream(__fp); \
    if(!file) break; \
    this_offset = file->offset; \
    file->offset = this_offset + __bytes; \
    if(file->file_record->counters[STDIO_MAX_BYTE_READ] < (this_offset + __bytes - 1)) \
        file->file_record->counters[STDIO_MAX_BYTE_READ] = (this_offset + __bytes - 1); \
    file->file_record->counters[STDIO_BYTES_READ] += __bytes; \
    file->file_record->counters[STDIO_READS] += 1; \
    if(file->file_record->fcounters[STDIO_F_READ_START_TIMESTAMP] == 0 || \
     file->file_record->fcounters[STDIO_F_READ_START_TIMESTAMP] > __tm1) \
        file->file_record->fcounters[STDIO_F_READ_START_TIMESTAMP] = __tm1; \
    file->file_record->fcounters[STDIO_F_READ_END_TIMESTAMP] = __tm2; \
    DARSHAN_TIMER_INC_NO_OVERLAP(file->file_record->fcounters[STDIO_F_READ_TIME], __tm1, __tm2, file->last_write_end); \
} while(0)

Philip Carns's avatar
Philip Carns committed
268
#define STDIO_RECORD_WRITE(__fp, __bytes,  __tm1, __tm2, __fflush_flag) do{ \
269 270 271 272 273 274 275 276 277
    int64_t this_offset; \
    struct stdio_file_runtime* file; \
    file = stdio_file_by_stream(__fp); \
    if(!file) break; \
    this_offset = file->offset; \
    file->offset = this_offset + __bytes; \
    if(file->file_record->counters[STDIO_MAX_BYTE_WRITTEN] < (this_offset + __bytes - 1)) \
        file->file_record->counters[STDIO_MAX_BYTE_WRITTEN] = (this_offset + __bytes - 1); \
    file->file_record->counters[STDIO_BYTES_WRITTEN] += __bytes; \
Philip Carns's avatar
Philip Carns committed
278 279 280 281
    if(__fflush_flag) \
        file->file_record->counters[STDIO_FLUSHES] += 1; \
    else \
        file->file_record->counters[STDIO_WRITES] += 1; \
282 283 284 285 286 287
    if(file->file_record->fcounters[STDIO_F_WRITE_START_TIMESTAMP] == 0 || \
     file->file_record->fcounters[STDIO_F_WRITE_START_TIMESTAMP] > __tm1) \
        file->file_record->fcounters[STDIO_F_WRITE_START_TIMESTAMP] = __tm1; \
    file->file_record->fcounters[STDIO_F_WRITE_END_TIMESTAMP] = __tm2; \
    DARSHAN_TIMER_INC_NO_OVERLAP(file->file_record->fcounters[STDIO_F_WRITE_TIME], __tm1, __tm2, file->last_write_end); \
} while(0)
288

Philip Carns's avatar
Philip Carns committed
289
FILE* DARSHAN_DECL(fopen)(const char *path, const char *mode)
Philip Carns's avatar
Philip Carns committed
290 291 292 293
{
    FILE* ret;
    double tm1, tm2;

Philip Carns's avatar
Philip Carns committed
294
    MAP_OR_FAIL(fopen);
Philip Carns's avatar
Philip Carns committed
295 296

    tm1 = darshan_core_wtime();
Philip Carns's avatar
Philip Carns committed
297
    ret = __real_fopen(path, mode);
Philip Carns's avatar
Philip Carns committed
298 299 300 301
    tm2 = darshan_core_wtime();

    STDIO_LOCK();
    stdio_runtime_initialize();
Philip Carns's avatar
Philip Carns committed
302
    STDIO_RECORD_OPEN(ret, path, tm1, tm2);
Philip Carns's avatar
Philip Carns committed
303 304 305 306 307
    STDIO_UNLOCK();

    return(ret);
}

Philip Carns's avatar
Philip Carns committed
308
FILE* DARSHAN_DECL(fopen64)(const char *path, const char *mode)
309 310
{
    FILE* ret;
311
    double tm1, tm2;
312 313 314

    MAP_OR_FAIL(fopen);

315
    tm1 = darshan_core_wtime();
Philip Carns's avatar
Philip Carns committed
316
    ret = __real_fopen64(path, mode);
317 318 319 320 321 322
    tm2 = darshan_core_wtime();

    STDIO_LOCK();
    stdio_runtime_initialize();
    STDIO_RECORD_OPEN(ret, path, tm1, tm2);
    STDIO_UNLOCK();
323 324 325 326

    return(ret);
}

Philip Carns's avatar
Philip Carns committed
327
FILE* DARSHAN_DECL(fdopen)(int fd, const char *mode)
328 329
{
    FILE* ret;
Philip Carns's avatar
Philip Carns committed
330
    double tm1, tm2;
331

Philip Carns's avatar
Philip Carns committed
332
    MAP_OR_FAIL(fdopen);
333

Philip Carns's avatar
Philip Carns committed
334
    tm1 = darshan_core_wtime();
Philip Carns's avatar
Philip Carns committed
335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354
    ret = __real_fdopen(fd, mode);
    tm2 = darshan_core_wtime();

    STDIO_LOCK();
    stdio_runtime_initialize();
    STDIO_RECORD_OPEN(ret, "UNKNOWN-FDOPEN", tm1, tm2);
    STDIO_UNLOCK();

    return(ret);
}

FILE* DARSHAN_DECL(freopen)(const char *path, const char *mode, FILE *stream)
{
    FILE* ret;
    double tm1, tm2;

    MAP_OR_FAIL(freopen);

    tm1 = darshan_core_wtime();
    ret = __real_freopen(path, mode, stream);
Philip Carns's avatar
Philip Carns committed
355 356 357 358 359 360
    tm2 = darshan_core_wtime();

    STDIO_LOCK();
    stdio_runtime_initialize();
    STDIO_RECORD_OPEN(ret, path, tm1, tm2);
    STDIO_UNLOCK();
361 362 363 364

    return(ret);
}

Philip Carns's avatar
Philip Carns committed
365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384
FILE* DARSHAN_DECL(freopen64)(const char *path, const char *mode, FILE *stream)
{
    FILE* ret;
    double tm1, tm2;

    MAP_OR_FAIL(freopen64);

    tm1 = darshan_core_wtime();
    ret = __real_freopen64(path, mode, stream);
    tm2 = darshan_core_wtime();

    STDIO_LOCK();
    stdio_runtime_initialize();
    STDIO_RECORD_OPEN(ret, path, tm1, tm2);
    STDIO_UNLOCK();

    return(ret);
}


Philip Carns's avatar
Philip Carns committed
385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404
int DARSHAN_DECL(fflush)(FILE *fp)
{
    double tm1, tm2;
    int ret;

    MAP_OR_FAIL(fflush);

    tm1 = darshan_core_wtime();
    ret = __real_fflush(fp);
    tm2 = darshan_core_wtime();

    STDIO_LOCK();
    stdio_runtime_initialize();
    if(ret >= 0)
        STDIO_RECORD_WRITE(fp, 0, tm1, tm2, 1);
    STDIO_UNLOCK();

    return(ret);
}

405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435
int DARSHAN_DECL(fclose)(FILE *fp)
{
    struct stdio_file_runtime* file;
    double tm1, tm2;
    int ret;

    MAP_OR_FAIL(fclose);

    tm1 = darshan_core_wtime();
    ret = __real_fclose(fp);
    tm2 = darshan_core_wtime();

    STDIO_LOCK();
    stdio_runtime_initialize();
    file = stdio_file_by_stream(fp);
    if(file)
    {
        if(file->file_record->fcounters[STDIO_F_CLOSE_START_TIMESTAMP] == 0 ||
         file->file_record->fcounters[STDIO_F_CLOSE_START_TIMESTAMP] > tm1)
           file->file_record->fcounters[STDIO_F_CLOSE_START_TIMESTAMP] = tm1;
        file->file_record->fcounters[STDIO_F_CLOSE_END_TIMESTAMP] = tm2;
        DARSHAN_TIMER_INC_NO_OVERLAP(
            file->file_record->fcounters[STDIO_F_META_TIME],
            tm1, tm2, file->last_meta_end);
        stdio_file_close_stream(fp);
    }
    STDIO_UNLOCK();

    return(ret);
}

436 437 438 439 440 441 442 443 444 445 446 447 448 449
size_t DARSHAN_DECL(fwrite)(const void *ptr, size_t size, size_t nmemb, FILE *stream)
{
    size_t ret;
    double tm1, tm2;

    MAP_OR_FAIL(fwrite);

    tm1 = darshan_core_wtime();
    ret = __real_fwrite(ptr, size, nmemb, stream);
    tm2 = darshan_core_wtime();

    STDIO_LOCK();
    stdio_runtime_initialize();
    if(ret > 0)
Philip Carns's avatar
Philip Carns committed
450
        STDIO_RECORD_WRITE(stream, size*ret, tm1, tm2, 0);
451 452 453 454 455
    STDIO_UNLOCK();

    return(ret);
}

Philip Carns's avatar
Philip Carns committed
456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476

int DARSHAN_DECL(fputc)(int c, FILE *stream)
{
    int ret;
    double tm1, tm2;

    MAP_OR_FAIL(fputc);

    tm1 = darshan_core_wtime();
    ret = __real_fputc(c, stream);
    tm2 = darshan_core_wtime();

    STDIO_LOCK();
    stdio_runtime_initialize();
    if(ret != EOF)
        STDIO_RECORD_WRITE(stream, 1, tm1, tm2, 0);
    STDIO_UNLOCK();

    return(ret);
}

Philip Carns's avatar
Philip Carns committed
477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497
int DARSHAN_DECL(putw)(int w, FILE *stream)
{
    int ret;
    double tm1, tm2;

    MAP_OR_FAIL(putw);

    tm1 = darshan_core_wtime();
    ret = __real_putw(w, stream);
    tm2 = darshan_core_wtime();

    STDIO_LOCK();
    stdio_runtime_initialize();
    if(ret != EOF)
        STDIO_RECORD_WRITE(stream, sizeof(int), tm1, tm2, 0);
    STDIO_UNLOCK();

    return(ret);
}


Philip Carns's avatar
Philip Carns committed
498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518

int DARSHAN_DECL(fputs)(const char *s, FILE *stream)
{
    int ret;
    double tm1, tm2;

    MAP_OR_FAIL(fputs);

    tm1 = darshan_core_wtime();
    ret = __real_fputs(s, stream);
    tm2 = darshan_core_wtime();

    STDIO_LOCK();
    stdio_runtime_initialize();
    if(ret != EOF && ret > 0)
        STDIO_RECORD_WRITE(stream, strlen(s), tm1, tm2, 0);
    STDIO_UNLOCK();

    return(ret);
}

Philip Carns's avatar
Philip Carns committed
519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571
int DARSHAN_DECL(vfprintf)(FILE *stream, const char *format, va_list ap)
{
    int ret;
    double tm1, tm2;
    long start_off, end_off;

    MAP_OR_FAIL(vfprintf);

    tm1 = darshan_core_wtime();
    start_off = ftell(stream);
    ret = __real_vfprintf(stream, format, ap);
    end_off = ftell(stream);
    tm2 = darshan_core_wtime();

    STDIO_LOCK();
    stdio_runtime_initialize();
    if(ret > 0)
        STDIO_RECORD_WRITE(stream, (end_off-start_off), tm1, tm2, 0);
    STDIO_UNLOCK();

    return(ret);
}


int DARSHAN_DECL(fprintf)(FILE *stream, const char *format, ...)
{
    int ret;
    double tm1, tm2;
    va_list ap;
    long start_off, end_off;

    MAP_OR_FAIL(vfprintf);

    tm1 = darshan_core_wtime();
    /* NOTE: we intentionally switch to vfprintf here to handle the variable
     * length arguments.
     */
    start_off = ftell(stream);
    va_start(ap, format);
    ret = __real_vfprintf(stream, format, ap);
    va_end(ap);
    end_off = ftell(stream);
    tm2 = darshan_core_wtime();

    STDIO_LOCK();
    stdio_runtime_initialize();
    if(ret > 0)
        STDIO_RECORD_WRITE(stream, (end_off-start_off), tm1, tm2, 0);
    STDIO_UNLOCK();

    return(ret);
}

572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591
size_t DARSHAN_DECL(fread)(void *ptr, size_t size, size_t nmemb, FILE *stream)
{
    size_t ret;
    double tm1, tm2;

    MAP_OR_FAIL(fread);

    tm1 = darshan_core_wtime();
    ret = __real_fread(ptr, size, nmemb, stream);
    tm2 = darshan_core_wtime();

    STDIO_LOCK();
    stdio_runtime_initialize();
    if(ret > 0)
        STDIO_RECORD_READ(stream, size*ret, tm1, tm2);
    STDIO_UNLOCK();

    return(ret);
}

Philip Carns's avatar
Philip Carns committed
592 593 594 595 596 597 598 599 600 601 602 603 604
size_t DARSHAN_DECL(fgetc)(FILE *stream)
{
    int ret;
    double tm1, tm2;

    MAP_OR_FAIL(fgetc);

    tm1 = darshan_core_wtime();
    ret = __real_fgetc(stream);
    tm2 = darshan_core_wtime();

    STDIO_LOCK();
    stdio_runtime_initialize();
Philip Carns's avatar
Philip Carns committed
605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625
    if(ret != EOF)
        STDIO_RECORD_READ(stream, 1, tm1, tm2);
    STDIO_UNLOCK();

    return(ret);
}

/* NOTE: stdio.h typically implements getc() as a macro pointing to _IO_getc */
size_t DARSHAN_DECL(_IO_getc)(FILE *stream)
{
    int ret;
    double tm1, tm2;

    MAP_OR_FAIL(_IO_getc);

    tm1 = darshan_core_wtime();
    ret = __real__IO_getc(stream);
    tm2 = darshan_core_wtime();

    STDIO_LOCK();
    stdio_runtime_initialize();
Philip Carns's avatar
Philip Carns committed
626 627 628 629 630 631 632
    if(ret != EOF)
        STDIO_RECORD_READ(stream, 1, tm1, tm2);
    STDIO_UNLOCK();

    return(ret);
}

Philip Carns's avatar
Philip Carns committed
633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652
/* NOTE: stdio.h typically implements putc() as a macro pointing to _IO_putc */
size_t DARSHAN_DECL(_IO_putc)(int c, FILE *stream)
{
    int ret;
    double tm1, tm2;

    MAP_OR_FAIL(_IO_putc);

    tm1 = darshan_core_wtime();
    ret = __real__IO_putc(c, stream);
    tm2 = darshan_core_wtime();

    STDIO_LOCK();
    stdio_runtime_initialize();
    if(ret != EOF)
        STDIO_RECORD_WRITE(stream, 1, tm1, tm2, 0);
    STDIO_UNLOCK();

    return(ret);
}
Philip Carns's avatar
Philip Carns committed
653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673
size_t DARSHAN_DECL(getw)(FILE *stream)
{
    int ret;
    double tm1, tm2;

    MAP_OR_FAIL(getw);

    tm1 = darshan_core_wtime();
    ret = __real_getw(stream);
    tm2 = darshan_core_wtime();

    STDIO_LOCK();
    stdio_runtime_initialize();
    if(ret != EOF || ferror(stream) == 0)
        STDIO_RECORD_READ(stream, sizeof(int), tm1, tm2);
    STDIO_UNLOCK();

    return(ret);
}


674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696
int DARSHAN_DECL(fscanf)(FILE *stream, const char *format, ...)
{
    int ret;
    double tm1, tm2;
    va_list ap;
    long start_off, end_off;

    MAP_OR_FAIL(vfscanf);

    tm1 = darshan_core_wtime();
    /* NOTE: we intentionally switch to vfscanf here to handle the variable
     * length arguments.
     */
    start_off = ftell(stream);
    va_start(ap, format);
    ret = __real_vfscanf(stream, format, ap);
    va_end(ap);
    end_off = ftell(stream);
    tm2 = darshan_core_wtime();

    STDIO_LOCK();
    stdio_runtime_initialize();
    if(ret != 0)
Philip Carns's avatar
Philip Carns committed
697
        STDIO_RECORD_READ(stream, (end_off-start_off), tm1, tm2);
698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726
    STDIO_UNLOCK();

    return(ret);
}

int DARSHAN_DECL(vfscanf)(FILE *stream, const char *format, va_list ap)
{
    int ret;
    double tm1, tm2;
    long start_off, end_off;

    MAP_OR_FAIL(vfscanf);

    tm1 = darshan_core_wtime();
    start_off = ftell(stream);
    ret = __real_vfscanf(stream, format, ap);
    end_off = ftell(stream);
    tm2 = darshan_core_wtime();

    STDIO_LOCK();
    stdio_runtime_initialize();
    if(ret != 0)
        STDIO_RECORD_READ(stream, end_off-start_off, tm1, tm2);
    STDIO_UNLOCK();

    return(ret);
}


Philip Carns's avatar
Philip Carns committed
727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747
char* DARSHAN_DECL(fgets)(char *s, int size, FILE *stream)
{
    char *ret;
    double tm1, tm2;

    MAP_OR_FAIL(fgets);

    tm1 = darshan_core_wtime();
    ret = __real_fgets(s, size, stream);
    tm2 = darshan_core_wtime();

    STDIO_LOCK();
    stdio_runtime_initialize();
    if(ret != NULL)
        STDIO_RECORD_READ(stream, strlen(ret), tm1, tm2);
    STDIO_UNLOCK();

    return(ret);
}


Philip Carns's avatar
Philip Carns committed
748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774
void DARSHAN_DECL(rewind)(FILE *stream)
{
    struct stdio_file_runtime* file;
    double tm1, tm2;

    MAP_OR_FAIL(rewind);

    tm1 = darshan_core_wtime();
    __real_rewind(stream);
    tm2 = darshan_core_wtime();

    STDIO_LOCK();
    stdio_runtime_initialize();
    file = stdio_file_by_stream(stream);
    if(file)
    {
        file->offset = 0;
        DARSHAN_TIMER_INC_NO_OVERLAP(
            file->file_record->fcounters[STDIO_F_META_TIME],
            tm1, tm2, file->last_meta_end);
        file->file_record->counters[STDIO_SEEKS] += 1;
    }
    STDIO_UNLOCK();

    return;
}

775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790
int DARSHAN_DECL(fseek)(FILE *stream, long offset, int whence)
{
    int ret;
    struct stdio_file_runtime* file;
    double tm1, tm2;

    MAP_OR_FAIL(fseek);

    tm1 = darshan_core_wtime();
    ret = __real_fseek(stream, offset, whence);
    tm2 = darshan_core_wtime();

    if(ret >= 0)
    {
        STDIO_LOCK();
        stdio_runtime_initialize();
Philip Carns's avatar
Philip Carns committed
791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821
        file = stdio_file_by_stream(stream);
        if(file)
        {
            file->offset = ftell(stream);
            DARSHAN_TIMER_INC_NO_OVERLAP(
                file->file_record->fcounters[STDIO_F_META_TIME],
                tm1, tm2, file->last_meta_end);
            file->file_record->counters[STDIO_SEEKS] += 1;
        }
        STDIO_UNLOCK();
    }

    return(ret);
}

int DARSHAN_DECL(fseeko)(FILE *stream, off_t offset, int whence)
{
    int ret;
    struct stdio_file_runtime* file;
    double tm1, tm2;

    MAP_OR_FAIL(fseeko);

    tm1 = darshan_core_wtime();
    ret = __real_fseeko(stream, offset, whence);
    tm2 = darshan_core_wtime();

    if(ret >= 0)
    {
        STDIO_LOCK();
        stdio_runtime_initialize();
Philip Carns's avatar
Philip Carns committed
822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852
        file = stdio_file_by_stream(stream);
        if(file)
        {
            file->offset = ftell(stream);
            DARSHAN_TIMER_INC_NO_OVERLAP(
                file->file_record->fcounters[STDIO_F_META_TIME],
                tm1, tm2, file->last_meta_end);
            file->file_record->counters[STDIO_SEEKS] += 1;
        }
        STDIO_UNLOCK();
    }

    return(ret);
}

int DARSHAN_DECL(fseeko64)(FILE *stream, off_t offset, int whence)
{
    int ret;
    struct stdio_file_runtime* file;
    double tm1, tm2;

    MAP_OR_FAIL(fseeko64);

    tm1 = darshan_core_wtime();
    ret = __real_fseeko64(stream, offset, whence);
    tm2 = darshan_core_wtime();

    if(ret >= 0)
    {
        STDIO_LOCK();
        stdio_runtime_initialize();
853 854 855 856 857 858 859 860 861 862 863 864 865 866 867
        file = stdio_file_by_stream(stream);
        if(file)
        {
            file->offset = ftell(stream);
            DARSHAN_TIMER_INC_NO_OVERLAP(
                file->file_record->fcounters[STDIO_F_META_TIME],
                tm1, tm2, file->last_meta_end);
            file->file_record->counters[STDIO_SEEKS] += 1;
        }
        STDIO_UNLOCK();
    }

    return(ret);
}

868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930
int DARSHAN_DECL(fsetpos)(FILE *stream, const fpos_t *pos)
{
    int ret;
    struct stdio_file_runtime* file;
    double tm1, tm2;

    MAP_OR_FAIL(fsetpos);

    tm1 = darshan_core_wtime();
    ret = __real_fsetpos(stream, pos);
    tm2 = darshan_core_wtime();

    if(ret >= 0)
    {
        STDIO_LOCK();
        stdio_runtime_initialize();
        file = stdio_file_by_stream(stream);
        if(file)
        {
            file->offset = ftell(stream);
            DARSHAN_TIMER_INC_NO_OVERLAP(
                file->file_record->fcounters[STDIO_F_META_TIME],
                tm1, tm2, file->last_meta_end);
            file->file_record->counters[STDIO_SEEKS] += 1;
        }
        STDIO_UNLOCK();
    }

    return(ret);
}

int DARSHAN_DECL(fsetpos64)(FILE *stream, const fpos_t *pos)
{
    int ret;
    struct stdio_file_runtime* file;
    double tm1, tm2;

    MAP_OR_FAIL(fsetpos64);

    tm1 = darshan_core_wtime();
    ret = __real_fsetpos64(stream, pos);
    tm2 = darshan_core_wtime();

    if(ret >= 0)
    {
        STDIO_LOCK();
        stdio_runtime_initialize();
        file = stdio_file_by_stream(stream);
        if(file)
        {
            file->offset = ftell(stream);
            DARSHAN_TIMER_INC_NO_OVERLAP(
                file->file_record->fcounters[STDIO_F_META_TIME],
                tm1, tm2, file->last_meta_end);
            file->file_record->counters[STDIO_SEEKS] += 1;
        }
        STDIO_UNLOCK();
    }

    return(ret);
}


931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969
/**********************************************************
 * Internal functions for manipulating STDIO module state *
 **********************************************************/

/* initialize internal STDIO module data structures and register with darshan-core */
static void stdio_runtime_initialize()
{
    int mem_limit;
    struct darshan_module_funcs stdio_mod_fns =
    {
        .begin_shutdown = &stdio_begin_shutdown,
        .get_output_data = &stdio_get_output_data,
        .shutdown = &stdio_shutdown
    };

    /* don't do anything if already initialized or instrumenation is disabled */
    if(stdio_runtime || instrumentation_disabled)
        return;

    /* register the stdio module with darshan core */
    darshan_core_register_module(
        DARSHAN_STDIO_MOD,
        &stdio_mod_fns,
        &my_rank,
        &mem_limit,
        &darshan_mem_alignment);

    /* return if no memory assigned by darshan core */
    if(mem_limit == 0)
        return;

    stdio_runtime = malloc(sizeof(*stdio_runtime));
    if(!stdio_runtime)
        return;
    memset(stdio_runtime, 0, sizeof(*stdio_runtime));

    /* set maximum number of file records according to max memory limit */
    /* NOTE: maximum number of records is based on the size of a stdio file record */
    /* TODO: should we base memory usage off file record or total runtime structure sizes? */
970
    stdio_runtime->file_array_size = mem_limit / sizeof(struct darshan_stdio_record);
971 972 973 974 975 976
    stdio_runtime->file_array_ndx = 0;

    /* allocate array of runtime file records */
    stdio_runtime->file_runtime_array = malloc(stdio_runtime->file_array_size *
                                               sizeof(struct stdio_file_runtime));
    stdio_runtime->file_record_array = malloc(stdio_runtime->file_array_size *
977
                                              sizeof(struct darshan_stdio_record));
978 979 980 981 982 983 984 985
    if(!stdio_runtime->file_runtime_array || !stdio_runtime->file_record_array)
    {
        stdio_runtime->file_array_size = 0;
        return;
    }
    memset(stdio_runtime->file_runtime_array, 0, stdio_runtime->file_array_size *
           sizeof(struct stdio_file_runtime));
    memset(stdio_runtime->file_record_array, 0, stdio_runtime->file_array_size *
986
           sizeof(struct darshan_stdio_record));
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 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 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 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157

    return;
}

/* get a STDIO file record for the given file path */
static struct stdio_file_runtime* stdio_file_by_name(const char *name)
{
    struct stdio_file_runtime *file = NULL;
    char *newname = NULL;
    darshan_record_id file_id;
    int file_alignment;
    int limit_flag;

    if(!stdio_runtime || instrumentation_disabled)
        return(NULL);

    newname = darshan_clean_file_path(name);
    if(!newname)
        newname = (char*)name;

    limit_flag = (stdio_runtime->file_array_ndx >= stdio_runtime->file_array_size);

    /* get a unique id for this file from darshan core */
    darshan_core_register_record(
        (void*)newname,
        strlen(newname),
        DARSHAN_STDIO_MOD,
        1,
        limit_flag,
        &file_id,
        &file_alignment);

    /* the file record id is set to 0 if no memory is available for tracking
     * new records -- just fall through and ignore this record
     */
    if(file_id == 0)
    {
        if(newname != name)
            free(newname);
        return(NULL);
    }

    /* search the hash table for this file record, and return if found */
    HASH_FIND(hlink, stdio_runtime->file_hash, &file_id, sizeof(darshan_record_id), file);
    if(file)
    {
        if(newname != name)
            free(newname);
        return(file);
    }

    /* no existing record, assign a new file record from the global array */
    file = &(stdio_runtime->file_runtime_array[stdio_runtime->file_array_ndx]);
    file->file_record = &(stdio_runtime->file_record_array[stdio_runtime->file_array_ndx]);
    file->file_record->f_id = file_id;
    file->file_record->rank = my_rank;

    /* add new record to file hash table */
    HASH_ADD(hlink, stdio_runtime->file_hash, file_record->f_id, sizeof(darshan_record_id), file);
    stdio_runtime->file_array_ndx++;

    if(newname != name)
        free(newname);
    return(file);
}

/* get a STDIO file record for the given file path, and also create a
 * reference structure using the returned stream
 */
static struct stdio_file_runtime* stdio_file_by_name_setstream(const char* name, FILE *stream)
{
    struct stdio_file_runtime* file;
    struct stdio_file_runtime_ref* ref;

    if(!stdio_runtime || instrumentation_disabled)
        return(NULL);

    /* find file record by name first */
    file = stdio_file_by_name(name);

    if(!file)
        return(NULL);

    /* search hash table for existing file ref for this stream */
    HASH_FIND(hlink, stdio_runtime->stream_hash, &stream, sizeof(FILE*), ref);
    if(ref)
    {
        /* we have a reference.  Make sure it points to the correct file
         * and return it
         */
        ref->file = file;
        return(file);
    }

    /* if we hit this point, then we don't have a reference for this stream 
     * in the table yet.  Add it.
     */
    ref = malloc(sizeof(*ref));
    if(!ref)
        return(NULL);
    memset(ref, 0, sizeof(*ref));

    ref->file = file;
    ref->stream = stream;    
    HASH_ADD(hlink, stdio_runtime->stream_hash, stream, sizeof(FILE*), ref);

    return(file);
}

/* get a STDIO file record for the given stream */
static struct stdio_file_runtime* stdio_file_by_stream(FILE *stream)
{
    struct stdio_file_runtime_ref* ref;

    if(!stdio_runtime || instrumentation_disabled)
        return(NULL);

    /* search hash table for existing file ref for this stream */
    HASH_FIND(hlink, stdio_runtime->stream_hash, &stream, sizeof(FILE*), ref);
    if(ref)
        return(ref->file);

    return(NULL);
}

/* free up reference data structures for the given stream */
static void stdio_file_close_stream(FILE *stream)
{
    struct stdio_file_runtime_ref* ref;

    if(!stdio_runtime || instrumentation_disabled)
        return;

    /* search hash table for this stream */
    HASH_FIND(hlink, stdio_runtime->stream_hash, &stream, sizeof(FILE*), ref);
    if(ref)
    {
        /* we have a reference, delete it */
        HASH_DELETE(hlink, stdio_runtime->stream_hash, ref);
        free(ref);
    }

    return;
}

/************************************************************************
 * Functions exported by this module for coordinating with darshan-core *
 ************************************************************************/

static void stdio_begin_shutdown()
{
    assert(stdio_runtime);

    STDIO_LOCK();
    /* disable further instrumentation while Darshan shuts down */
    instrumentation_disabled = 1;
    STDIO_UNLOCK();

    return;
}

static void stdio_get_output_data(
    MPI_Comm mod_comm,
    darshan_record_id *shared_recs,
    int shared_rec_count,
    void **stdio_buf,
    int *stdio_buf_sz)
{
    assert(stdio_runtime);

    *stdio_buf = (void *)(stdio_runtime->file_record_array);
1158
    *stdio_buf_sz = stdio_runtime->file_array_ndx * sizeof(struct darshan_stdio_record);
1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193

    return;
}

static void stdio_shutdown()
{
    struct stdio_file_runtime_ref *ref, *tmp;

    assert(stdio_runtime);

    HASH_ITER(hlink, stdio_runtime->stream_hash, ref, tmp)
    {
        HASH_DELETE(hlink, stdio_runtime->stream_hash, ref);
        free(ref);
    }

    HASH_CLEAR(hlink, stdio_runtime->file_hash); /* these entries are freed all at once below */

    free(stdio_runtime->file_runtime_array);
    free(stdio_runtime->file_record_array);
    free(stdio_runtime);
    stdio_runtime = NULL;
    instrumentation_disabled = 0;
    
    return;
}

/*
 * Local variables:
 *  c-indent-level: 4
 *  c-basic-offset: 4
 * End:
 *
 * vim: ts=8 sts=4 sw=4 expandtab
 */