aboutsummaryrefslogblamecommitdiffstats
path: root/lib/erl_interface/test/all_SUITE_data/runner.c
blob: a474c17722279f5eedd46582bb017ffd7255bc53 (plain) (tree)
1
2
3
4
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
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
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
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
200
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
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
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
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458


                   
                                                        















                                                                         
                   




















































































































































































































































































































































































































































                                                                              
/*
 * %CopyrightBegin%
 * 
 * Copyright Ericsson AB 1997-2013. All Rights Reserved.
 * 
 * The contents of this file are subject to the Erlang Public License,
 * Version 1.1, (the "License"); you may not use this file except in
 * compliance with the License. You should have received a copy of the
 * Erlang Public License along with this software. If not, it can be
 * retrieved online at http://www.erlang.org/.
 * 
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 * 
 * %CopyrightEnd%
 */

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#ifndef __WIN32__
#include <unistd.h>
#endif
#include <stdarg.h>

#include "runner.h"

#ifndef __WIN32__
#define _O_BINARY 0
#define _setmode(fd, mode)
#endif

#define HEADER_SIZE 4

static char* progname;		/* Name of this program (from argv[0]). */
static int fd_from_erl;		/* File descriptor from Erlang. */
static int fd_to_erl;		/* File descriptor to Erlang. */

static int packet_loop();
static void ensure_buf_big_enough();
static int readn();
static void reply(char* buf, unsigned size);
static void dump();

void
run_tests(char* argv0, TestCase test_cases[], unsigned number)
{
    int i;
    int n;
    char* packet;

    progname = argv0;
    _setmode(0, _O_BINARY);
    _setmode(1, _O_BINARY);
    fd_from_erl = 0;
    fd_to_erl = 1;

    packet = read_packet(&n);

    /*
     * Dispatch to the appropriate test function.
     */

    i = packet[0] * 256 + packet[1];
    if (i >= number) {
	fprintf(stderr, "%s: bad test case number %d",
		progname, i);
	free(packet);
	exit(1);
    } else {
	(*test_cases[i])();
	free(packet);
    }
}


/***********************************************************************
 *
 * R e a d i n g   p a c k e t s
 *
 ************************************************************************/

/*
 * Reads an Erlang term.
 *
 * Returns: A pointer to a term (an ETERM structure) if there was
 * at term available, or a NULL pointer if there was an 'eot' (end-of-test)
 * packet.  Aborts if anything else received.
 */

ETERM*
get_term(void)
{
    char* encoded;
    ETERM* term;
    int n;

    encoded = read_packet(&n);

    switch (encoded[0]) {
    case 'e':
      free(encoded);
      return NULL;
    case 't':
	term = erl_decode(encoded+1);
	free(encoded);
	if (term == NULL) {
	    fail("Failed to decode term");
	    exit(0);
	}
	return term;
    default:
	fprintf(stderr, "Garbage received: ");
	dump(encoded, n, 16);
	putc('\n', stderr);
	fail("C program received garbage");
	free(encoded);
	exit(1);
    }
}


/*
 * Reads a packet from Erlang.  The packet must be a standard {packet, 2}
 * packet.  This function aborts if any error is detected (including EOF).
 *
 * Returns: The number of bytes in the packet.
 */

char *read_packet(int *len)
{

  unsigned char* io_buf = NULL; /* Buffer for file i/o. */
  int i;
  unsigned char header[HEADER_SIZE];
  unsigned packet_length;		/* Length of current packet. */
  int bytes_read;
    
  /*
   * Read the packet header.
   */
    
  bytes_read = readn(fd_from_erl, header, HEADER_SIZE);

  if (bytes_read == 0) {
    fprintf(stderr, "%s: Unexpected end of file\n", progname);
    exit(1);
  }
  if (bytes_read != HEADER_SIZE) {
    fprintf(stderr, "%s: Failed to read packet header\n", progname);
    exit(1);
  }

  /*
   * Get the length of this packet.
   */
	
  packet_length = 0;

  for (i = 0; i < HEADER_SIZE; i++)
    packet_length = (packet_length << 8) | header[i];
    
  if (len) *len=packet_length; /* report length only if caller requested it */

  if ((io_buf = (char *) malloc(packet_length)) == NULL) {
    fprintf(stderr, "%s: insufficient memory for i/o buffer of size %d\n",
	    progname, packet_length);
    exit(1);
  }

  /*
   * Read the packet itself.
   */
    
  bytes_read = readn(fd_from_erl, io_buf, packet_length);
  if (bytes_read != packet_length) {
    fprintf(stderr, "%s: couldn't read packet of length %d\r\n",
	    progname, packet_length);
    free(io_buf);
    exit(1);
  }

  return io_buf;
}


/***********************************************************************
 * S e n d i n g   r e p l i e s
 *
 * The functions below send various types of replies back to Erlang.
 * Each reply start with a letter indicating the type of reply.
 *
 * Reply		Translated to on Erlang side
 * -----		----------------------------
 * [$b|Bytes]		{bytes, Bytes}
 * [$e]			eot
 * [$f]			test_server:fail()
 * [$f|Reason]		test_server:fail(Reason)
 * [$t|EncodedTerm]	{term, Term}
 * [$N]			'NULL'
 * [$m|Message]		io:format("~s", [Message])   (otherwise ignored)
 *
 ***********************************************************************/

/*
 * This function reports the outcome of a test fail.  It is useful if
 * you implement a test case entirely in C code.
 *
 * If the ok argument is zero, a [$f] reply will be sent to the
 * Erlang side (causing test_server:fail() to be called); otherwise,
 * the atom 'eot' will be sent to Erlang.
 *
 * If you need to provide more details on a failure, use the fail() function.
 */

void
do_report(file, line, ok)
    char* file;
    int line;
    int ok;			/* Zero if failed; non-zero otherwise. */
{
    char reason;
    unsigned long ab;
    unsigned long fb;

    reason = ok ? 'e' : 'f';

    if (!ok) {
	do_fail(file, line, "Generic failure");
    } else {
      /* release all unallocated blocks */
      erl_eterm_release();
      /* check mem usage stats */
      erl_eterm_statistics(&ab, &fb);
      if ((ab == 0) && (fb == 0) ) {
	reply(&reason, 1);
      }
      else {
	char sbuf[128];
	    
	sprintf(sbuf, "still %lu terms allocated,"
		" %lu on freelist at end of test", ab, fb);
	do_fail(file, line, sbuf);
      }
    }
}


/*
 * This function causes a call to test_server:fail(Reason) on the
 * Erlang side.
 */

void
do_fail(char* file, int line, char* reason)
{
    char sbuf[2048];

    sbuf[0] = 'f';
    sprintf(sbuf+1, "%s, line %d: %s", file, line, reason);
    reply(sbuf, 1+strlen(sbuf+1));
}

/*
 * This function sends a message to the Erlang side.
 * The message will be written to the test servers log file,
 * but will otherwise be completly ignored.
 */

void
message(char* format, ...)
{
    va_list ap;
    char sbuf[1024];

    sbuf[0] = 'm';
    va_start(ap, format);
    vsprintf(sbuf+1, format, ap);
    va_end(ap);

    reply(sbuf, 1+strlen(sbuf+1));
}

/*
 * This function sends the given term to the Erlang side,
 * where it will be received as {term, Term}.
 *
 * If the given pointer is NULL (indicating an invalid term),
 * the result on the Erlang side will be the atom 'NULL'.
 *
 * After sending the term, this function frees the term by
 * calling erl_free_term().
 */

void
send_term(term)
    ETERM* term;		/* Term to be sent to Erlang side. */
{
    char encoded[64*1024];
    int n;

    if (term == NULL) {
	encoded[0] = 'N';
	n = 1;
    } else {
	encoded[0] = 't';
	n = 1 + erl_encode(term, encoded+1);
	erl_free_term(term);
    }
    reply(encoded, n);
}

#if 0

/* Seriously broken!!! */

void
send_bin_term(x_ei_buff* x)
{
    x_ei_buff x2;
    x_ei_new(&x2);
    x2.buff[x2.index++] = 't';
    x_ei_append(&x2, x);
    reply(x2.buff, x2.index);
    free(x2.buff);
}
#endif

/*
 * This function sends a raw buffer of data to the
 * Erlang side, where it will be received as {bytes, Bytes}.
 */

void
send_buffer(buf, size)
    char* buf;			/* Buffer with bytes to send to Erlang. */
    int size;			/* Size of data to send to Erlang. */
{
    char* send_buf;

    send_buf = (char *) malloc(size+1);
    send_buf[0] = 'b';
    memcpy(send_buf+1, buf, size);
    reply(send_buf, size+1);
    free(send_buf);
}

/***********************************************************************
 *
 * P r i v a t e   h e l p e r s
 *
 ***********************************************************************/

/*
 * Sends a packet back to Erlang.
 */

static void
reply(reply_buf, size)
     char* reply_buf;		/* Buffer with reply. */
     unsigned size;		/* Size of reply. */
{
    int n;			/* Temporary to hold size. */
    int i;			/* Loop counter. */
    char* buf;


    buf = (char *) malloc(size+HEADER_SIZE);
    memcpy(buf+HEADER_SIZE, reply_buf, size);

    /*
     * Fill the header starting with the least significant byte.
     */

    n = size;
    for (i = HEADER_SIZE-1; i >= 0; i--) {
	buf[i] = (char) n;	/* Store least significant byte. */
	n = n >> 8;
    }

    size += HEADER_SIZE;
/*
    fprintf(stderr, "\r\nReply size: %u\r\n",
	    (unsigned)buf[0] << 8 + (unsigned)buf[1]);

    for (i = 0; i < size; i++) {
	fprintf(stderr,"%u %c\r\n",buf[i],buf[i]);
    }

    fprintf(stderr, "\r\n");
*/
    write(fd_to_erl, buf, size);
    free(buf);
}


/*
 * Reads len number of bytes.
 */

static int
readn(fd, buf, len)
     int fd;			/* File descriptor to read from. */
     unsigned char *buf;	/* Store in this buffer. */
     int len;			/* Number of bytes to read. */
{
    int n;			/* Byte count in last read call. */
    int sofar = 0;		/* Bytes read so far. */

    do {
	if ((n = read(fd, buf+sofar, len-sofar)) <= 0)
	    /* error or EOF in read */
	    return(n);
	sofar += n;
    } while (sofar < len);
    return sofar;
}

void
dump(buf, sz, max)
     unsigned char* buf;
     int sz;
     int max;
{
    int i, imax;
    char comma[5] = ",";
    
    if (!sz)
	return;
    if (sz > max)
	imax = max;
    else
	imax = sz;
    
    for (i=0; i<imax; i++) {
	if (i == imax-1) {
	    if (sz > max)
		strcpy(comma, ",...");
	    else
		comma[0] = 0;
	}
	if (isdigit(buf[i]))
	    fprintf(stderr, "%u%s", (int)(buf[i]), comma);
	else {
	    if (isalpha(buf[i])) {
		fprintf(stderr, "%c%s", buf[i], comma);
	    }
	    else
		fprintf(stderr, "%u%s", (int)(buf[i]), comma);
	}
    }
}