forked from emscripten-core/emscripten
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathemscripten.py
executable file
·1446 lines (1261 loc) · 61.7 KB
/
emscripten.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
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
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
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
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
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
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
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
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
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
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
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
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
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
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
#!/usr/bin/env python2
'''
You should normally never use this! Use emcc instead.
This is a small wrapper script around the core JS compiler. This calls that
compiler with the settings given to it. It can also read data from C/C++
header files (so that the JS compiler can see the constants in those
headers, for the libc implementation in JS).
'''
import os, sys, json, optparse, subprocess, re, time, multiprocessing, string, logging
from tools import shared
from tools import jsrun, cache as cache_module, tempfiles
from tools.response_file import read_response_file
__rootpath__ = os.path.abspath(os.path.dirname(__file__))
def path_from_root(*pathelems):
"""Returns the absolute path for which the given path elements are
relative to the emscripten root.
"""
return os.path.join(__rootpath__, *pathelems)
def get_configuration():
if hasattr(get_configuration, 'configuration'):
return get_configuration.configuration
configuration = shared.Configuration(environ=os.environ)
get_configuration.configuration = configuration
return configuration
def scan(ll, settings):
# blockaddress(@main, %23)
blockaddrs = []
for blockaddr in re.findall('blockaddress\([^)]*\)', ll):
b = blockaddr.split('(')[1][:-1].split(', ')
blockaddrs.append(b)
if len(blockaddrs) > 0:
settings['NECESSARY_BLOCKADDRS'] = blockaddrs
NUM_CHUNKS_PER_CORE = 1.0
MIN_CHUNK_SIZE = 1024*1024
MAX_CHUNK_SIZE = float(os.environ.get('EMSCRIPT_MAX_CHUNK_SIZE') or 'inf') # configuring this is just for debugging purposes
STDERR_FILE = os.environ.get('EMCC_STDERR_FILE')
if STDERR_FILE:
STDERR_FILE = os.path.abspath(STDERR_FILE)
logging.info('logging stderr in js compiler phase into %s' % STDERR_FILE)
STDERR_FILE = open(STDERR_FILE, 'w')
def process_funcs((i, funcs_file, meta, settings_file, compiler, forwarded_file, libraries, compiler_engine, DEBUG)):
try:
#print >> sys.stderr, 'running', str([settings_file, funcs_file, 'funcs', forwarded_file] + libraries).replace("'/", "'") # can use this in src/compiler_funcs.html arguments,
# # just copy temp dir to under this one
out = jsrun.run_js(
compiler,
engine=compiler_engine,
args=[settings_file, funcs_file, 'funcs', forwarded_file] + libraries,
stdout=subprocess.PIPE,
stderr=STDERR_FILE,
cwd=path_from_root('src'))
except KeyboardInterrupt:
# Python 2.7 seems to lock up when a child process throws KeyboardInterrupt
raise Exception()
if DEBUG: logging.debug('.')
return out
def emscript(infile, settings, outfile, libraries=[], compiler_engine=None,
jcache=None, temp_files=None, DEBUG=None, DEBUG_CACHE=None):
"""Runs the emscripten LLVM-to-JS compiler. We parallelize as much as possible
Args:
infile: The path to the input LLVM assembly file.
settings: JSON-formatted settings that override the values
defined in src/settings.js.
outfile: The file where the output is written.
"""
compiler = path_from_root('src', 'compiler.js')
# Parallelization: We run 3 phases:
# 1 aka 'pre' : Process types and metadata and so forth, and generate the preamble.
# 2 aka 'funcs': Process functions. We can parallelize this, working on each function independently.
# 3 aka 'post' : Process globals, generate postamble and finishing touches.
if DEBUG: logging.debug('emscript: ll=>js')
if jcache: jcache.ensure()
# Pre-scan ll and alter settings as necessary
if DEBUG: t = time.time()
ll = open(infile).read()
scan(ll, settings)
total_ll_size = len(ll)
if DEBUG: logging.debug(' emscript: scan took %s seconds' % (time.time() - t))
# Split input into the relevant parts for each phase
if DEBUG: t = time.time()
pre = []
funcs = [] # split up functions here, for parallelism later
meta_start = ll.find('\n!')
if meta_start > 0:
meta = ll[meta_start:]
else:
meta = ''
meta_start = -1
start = ll.find('\n') if ll[0] == ';' else 0 # ignore first line, which contains ; ModuleID = '/dir name'
func_start = start
last = func_start
while 1:
last = func_start
func_start = ll.find('\ndefine ', func_start)
if func_start > last:
pre.append(ll[last:min(func_start+1, meta_start) if meta_start > 0 else func_start+1] + '\n')
if func_start < 0:
pre.append(ll[last:meta_start] + '\n')
break
header = ll[func_start+1:ll.find('\n', func_start+1)+1]
end = ll.find('\n}', func_start)
last = end+3
funcs.append((header, ll[func_start+1:last]))
pre.append(header + '}\n')
func_start = last
ll = None
if DEBUG and len(meta) > 1024*1024: logging.debug('emscript warning: large amounts of metadata, will slow things down')
if DEBUG: logging.debug(' emscript: split took %s seconds' % (time.time() - t))
if len(funcs) == 0:
logging.error('No functions to process. Make sure you prevented LLVM from eliminating them as dead (use EXPORTED_FUNCTIONS if necessary, see the FAQ)')
#if DEBUG:
# logging.debug('========= pre ================\n')
# logging.debug(''.join(pre))
# logging.debug('========== funcs ===============\n')
# for func in funcs:
# logging.debug('\n// ===\n\n', ''.join(func))
# logging.debug('=========================\n')
# Save settings to a file to work around v8 issue 1579
settings_file = temp_files.get('.txt').name
def save_settings():
global settings_text
settings_text = json.dumps(settings, sort_keys=True)
s = open(settings_file, 'w')
s.write(settings_text)
s.close()
save_settings()
# Phase 1 - pre
if DEBUG: t = time.time()
pre_file = temp_files.get('.pre.ll').name
pre_input = ''.join(pre) + '\n' + meta
out = None
if jcache:
keys = [pre_input, settings_text, ','.join(libraries)]
shortkey = jcache.get_shortkey(keys)
if DEBUG_CACHE: logging.debug('shortkey', shortkey)
out = jcache.get(shortkey, keys)
if DEBUG_CACHE and not out:
dfpath = os.path.join(get_configuration().TEMP_DIR, "ems_" + shortkey)
dfp = open(dfpath, 'w')
dfp.write(pre_input)
dfp.write("\n\n========================== settings_text\n\n")
dfp.write(settings_text)
dfp.write("\n\n========================== libraries\n\n")
dfp.write("\n".join(libraries))
dfp.close()
logging.debug(' cache miss, key data dumped to %s' % dfpath)
if out and DEBUG: logging.debug(' loading pre from jcache')
if not out:
open(pre_file, 'w').write(pre_input)
#print >> sys.stderr, 'running', str([settings_file, pre_file, 'pre'] + libraries).replace("'/", "'") # see funcs
out = jsrun.run_js(compiler, compiler_engine, [settings_file, pre_file, 'pre'] + libraries, stdout=subprocess.PIPE, stderr=STDERR_FILE,
cwd=path_from_root('src'))
assert '//FORWARDED_DATA:' in out, 'Did not receive forwarded data in pre output - process failed?'
if jcache:
if DEBUG: logging.debug(' saving pre to jcache')
jcache.set(shortkey, keys, out)
pre, forwarded_data = out.split('//FORWARDED_DATA:')
forwarded_file = temp_files.get('.json').name
pre_input = None
open(forwarded_file, 'w').write(forwarded_data)
if DEBUG: logging.debug(' emscript: phase 1 took %s seconds' % (time.time() - t))
indexed_functions = set()
forwarded_json = json.loads(forwarded_data)
for key in forwarded_json['Functions']['indexedFunctions'].iterkeys():
indexed_functions.add(key)
# Phase 2 - func
cores = int(os.environ.get('EMCC_CORES') or multiprocessing.cpu_count())
assert cores >= 1
if cores > 1:
intended_num_chunks = int(round(cores * NUM_CHUNKS_PER_CORE))
chunk_size = max(MIN_CHUNK_SIZE, total_ll_size / intended_num_chunks)
chunk_size += 3*len(meta) # keep ratio of lots of function code to meta (expensive to process, and done in each parallel task)
chunk_size = min(MAX_CHUNK_SIZE, chunk_size)
else:
chunk_size = MAX_CHUNK_SIZE # if 1 core, just use the max chunk size
if DEBUG: t = time.time()
if settings.get('ASM_JS'):
settings['EXPORTED_FUNCTIONS'] = forwarded_json['EXPORTED_FUNCTIONS']
save_settings()
chunks = cache_module.chunkify(
funcs, chunk_size,
jcache.get_cachename('emscript_files') if jcache else None)
#sys.exit(1)
#chunks = [chunks[0]] # pick specific chunks for debugging/profiling
funcs = None
if jcache:
# load chunks from cache where we can # TODO: ignore small chunks
cached_outputs = []
def load_from_cache(chunk):
keys = [settings_text, forwarded_data, chunk]
shortkey = jcache.get_shortkey(keys) # TODO: share shortkeys with later code
out = jcache.get(shortkey, keys) # this is relatively expensive (pickling?)
if out:
cached_outputs.append(out)
return False
return True
chunks = filter(load_from_cache, chunks)
if len(cached_outputs) > 0:
if out and DEBUG: logging.debug(' loading %d funcchunks from jcache' % len(cached_outputs))
else:
cached_outputs = []
# TODO: minimize size of forwarded data from funcs to what we actually need
if len(chunks) > 0:
if cores == 1 and total_ll_size < MAX_CHUNK_SIZE:
assert len(chunks) == 1, 'no point in splitting up without multiple cores'
if DEBUG: logging.debug(' emscript: phase 2 working on %d chunks %s (intended chunk size: %.2f MB, meta: %.2f MB, forwarded: %.2f MB, total: %.2f MB)' % (len(chunks), ('using %d cores' % cores) if len(chunks) > 1 else '', chunk_size/(1024*1024.), len(meta)/(1024*1024.), len(forwarded_data)/(1024*1024.), total_ll_size/(1024*1024.)))
commands = []
for i in range(len(chunks)):
funcs_file = temp_files.get('.func_%d.ll' % i).name
f = open(funcs_file, 'w')
f.write(chunks[i])
if not jcache:
chunks[i] = None # leave chunks array alive (need its length later)
f.write('\n')
f.write(meta)
f.close()
commands.append(
(i, funcs_file, meta, settings_file, compiler, forwarded_file, libraries, compiler_engine,# + ['--prof'],
DEBUG)
)
if len(chunks) > 1:
pool = multiprocessing.Pool(processes=cores)
outputs = pool.map(process_funcs, commands, chunksize=1)
elif len(chunks) == 1:
outputs = [process_funcs(commands[0])]
commands = None
else:
outputs = []
if jcache:
# save chunks to cache
for i in range(len(chunks)):
chunk = chunks[i]
keys = [settings_text, forwarded_data, chunk]
shortkey = jcache.get_shortkey(keys)
jcache.set(shortkey, keys, outputs[i])
if out and DEBUG and len(chunks) > 0: logging.debug(' saving %d funcchunks to jcache' % len(chunks))
chunks = None
if jcache: outputs += cached_outputs # TODO: preserve order
outputs = [output.split('//FORWARDED_DATA:') for output in outputs]
for output in outputs:
assert len(output) == 2, 'Did not receive forwarded data in an output - process failed? We only got: ' + output[0][-3000:]
if DEBUG: logging.debug(' emscript: phase 2 took %s seconds' % (time.time() - t))
if DEBUG: t = time.time()
# merge forwarded data
if settings.get('ASM_JS'):
all_exported_functions = set(settings['EXPORTED_FUNCTIONS']) # both asm.js and otherwise
for additional_export in settings['DEFAULT_LIBRARY_FUNCS_TO_INCLUDE']: # additional functions to export from asm, if they are implemented
all_exported_functions.add('_' + additional_export)
exported_implemented_functions = set()
for func_js, curr_forwarded_data in outputs:
curr_forwarded_json = json.loads(curr_forwarded_data)
forwarded_json['Types']['hasInlineJS'] = forwarded_json['Types']['hasInlineJS'] or curr_forwarded_json['Types']['hasInlineJS']
forwarded_json['Types']['usesSIMD'] = forwarded_json['Types']['usesSIMD'] or curr_forwarded_json['Types']['usesSIMD']
forwarded_json['Types']['preciseI64MathUsed'] = forwarded_json['Types']['preciseI64MathUsed'] or curr_forwarded_json['Types']['preciseI64MathUsed']
for key, value in curr_forwarded_json['Functions']['blockAddresses'].iteritems():
forwarded_json['Functions']['blockAddresses'][key] = value
for key in curr_forwarded_json['Functions']['indexedFunctions'].iterkeys():
indexed_functions.add(key)
if settings.get('ASM_JS'):
export_bindings = settings['EXPORT_BINDINGS']
export_all = settings['EXPORT_ALL']
for key in curr_forwarded_json['Functions']['implementedFunctions'].iterkeys():
if key in all_exported_functions or export_all or (export_bindings and key.startswith('_emscripten_bind')):
exported_implemented_functions.add(key)
for key, value in curr_forwarded_json['Functions']['unimplementedFunctions'].iteritems():
forwarded_json['Functions']['unimplementedFunctions'][key] = value
for key, value in curr_forwarded_json['Functions']['neededTables'].iteritems():
forwarded_json['Functions']['neededTables'][key] = value
if settings.get('ASM_JS'):
parts = pre.split('// ASM_LIBRARY FUNCTIONS\n')
if len(parts) > 1:
pre = parts[0]
outputs.append([parts[1]])
funcs_js = [output[0] for output in outputs]
outputs = None
if DEBUG: logging.debug(' emscript: phase 2b took %s seconds' % (time.time() - t))
if DEBUG: t = time.time()
# calculations on merged forwarded data
forwarded_json['Functions']['indexedFunctions'] = {}
i = settings['FUNCTION_POINTER_ALIGNMENT'] # universal counter
if settings['ASM_JS']: i += settings['RESERVED_FUNCTION_POINTERS']*settings['FUNCTION_POINTER_ALIGNMENT']
base_fp = i
table_counters = {} # table-specific counters
alias = settings['ASM_JS'] and settings['ALIASING_FUNCTION_POINTERS']
sig = None
for indexed in indexed_functions:
if alias:
sig = forwarded_json['Functions']['implementedFunctions'].get(indexed) or forwarded_json['Functions']['unimplementedFunctions'].get(indexed)
assert sig, indexed
if sig not in table_counters:
table_counters[sig] = base_fp
curr = table_counters[sig]
table_counters[sig] += settings['FUNCTION_POINTER_ALIGNMENT']
else:
curr = i
i += settings['FUNCTION_POINTER_ALIGNMENT']
#logging.debug('function indexing ' + str([indexed, curr, sig]))
forwarded_json['Functions']['indexedFunctions'][indexed] = curr # make sure not to modify this python object later - we use it in indexize
def split_32(x):
x = int(x)
return '%d,%d,%d,%d' % (x&255, (x >> 8)&255, (x >> 16)&255, (x >> 24)&255)
indexing = forwarded_json['Functions']['indexedFunctions']
def indexize_mem(js):
return re.sub(r"\"?'?{{ FI_([\w\d_$]+) }}'?\"?,0,0,0", lambda m: split_32(indexing.get(m.groups(0)[0]) or 0), js)
def indexize(js):
return re.sub(r"'{{ FI_([\w\d_$]+) }}'", lambda m: str(indexing.get(m.groups(0)[0]) or 0), js)
blockaddrs = forwarded_json['Functions']['blockAddresses']
def blockaddrsize_mem(js):
return re.sub(r'"?{{{ BA_([\w\d_$]+)\|([\w\d_$]+) }}}"?,0,0,0', lambda m: split_32(blockaddrs[m.groups(0)[0]][m.groups(0)[1]]), js)
def blockaddrsize(js):
return re.sub(r'"?{{{ BA_([\w\d_$]+)\|([\w\d_$]+) }}}"?', lambda m: str(blockaddrs[m.groups(0)[0]][m.groups(0)[1]]), js)
pre = blockaddrsize(blockaddrsize_mem(indexize(indexize_mem(pre))))
if settings.get('ASM_JS'):
# move postsets into the asm module
class PostSets: js = ''
def handle_post_sets(m):
PostSets.js = m.group(0)
return '\n'
pre = re.sub(r'function runPostSets[^}]+}', handle_post_sets, pre)
#if DEBUG: outfile.write('// pre\n')
outfile.write(pre)
pre = None
#if DEBUG: outfile.write('// funcs\n')
# forward
forwarded_data = json.dumps(forwarded_json)
forwarded_file = temp_files.get('.2.json').name
open(forwarded_file, 'w').write(indexize(forwarded_data))
if DEBUG: logging.debug(' emscript: phase 2c took %s seconds' % (time.time() - t))
# Phase 3 - post
if DEBUG: t = time.time()
post_file = temp_files.get('.post.ll').name
open(post_file, 'w').write('\n') # no input, just processing of forwarded data
out = jsrun.run_js(compiler, compiler_engine, [settings_file, post_file, 'post', forwarded_file] + libraries, stdout=subprocess.PIPE, stderr=STDERR_FILE,
cwd=path_from_root('src'))
post, last_forwarded_data = out.split('//FORWARDED_DATA:') # if this fails, perhaps the process failed prior to printing forwarded data?
last_forwarded_json = json.loads(last_forwarded_data)
if settings.get('ASM_JS'):
post_funcs, post_rest = post.split('// EMSCRIPTEN_END_FUNCS\n')
post = post_rest
# Move preAsms to their right place
def move_preasm(m):
contents = m.groups(0)[0]
outfile.write(contents + '\n')
return ''
post_funcs = re.sub(r'/\* PRE_ASM \*/(.*)\n', lambda m: move_preasm(m), post_funcs)
funcs_js += ['\n' + post_funcs + '// EMSCRIPTEN_END_FUNCS\n']
simple = os.environ.get('EMCC_SIMPLE_ASM')
class Counter:
i = 0
j = 0
pre_tables = last_forwarded_json['Functions']['tables']['pre']
del last_forwarded_json['Functions']['tables']['pre']
def make_table(sig, raw):
i = Counter.i
Counter.i += 1
bad = 'b' + str(i)
params = ','.join(['p%d' % p for p in range(len(sig)-1)])
coercions = ';'.join(['p%d = %s' % (p, shared.JS.make_coercion('p%d' % p, sig[p+1], settings)) for p in range(len(sig)-1)]) + ';'
ret = '' if sig[0] == 'v' else ('return %s' % shared.JS.make_initializer(sig[0], settings))
start = raw.index('[')
end = raw.rindex(']')
body = raw[start+1:end].split(',')
for j in range(settings['RESERVED_FUNCTION_POINTERS']):
body[settings['FUNCTION_POINTER_ALIGNMENT'] * (1 + j)] = 'jsCall_%s_%s' % (sig, j)
Counter.j = 0
def fix_item(item):
Counter.j += 1
newline = Counter.j % 30 == 29
if item == '0': return bad if not newline else (bad + '\n')
return item if not newline else (item + '\n')
body = ','.join(map(fix_item, body))
return ('function %s(%s) { %s %s(%d); %s }' % (bad, params, coercions, 'abort' if not settings['ASSERTIONS'] else 'nullFunc', i, ret), ''.join([raw[:start+1], body, raw[end:]]))
infos = [make_table(sig, raw) for sig, raw in last_forwarded_json['Functions']['tables'].iteritems()]
function_tables_defs = '\n'.join([info[0] for info in infos]) + '\n// EMSCRIPTEN_END_FUNCS\n' + '\n'.join([info[1] for info in infos])
asm_setup = ''
maths = ['Math.' + func for func in ['floor', 'abs', 'sqrt', 'pow', 'cos', 'sin', 'tan', 'acos', 'asin', 'atan', 'atan2', 'exp', 'log', 'ceil', 'imul']]
fundamentals = ['Math', 'Int8Array', 'Int16Array', 'Int32Array', 'Uint8Array', 'Uint16Array', 'Uint32Array', 'Float32Array', 'Float64Array']
math_envs = ['Math.min'] # TODO: move min to maths
asm_setup += '\n'.join(['var %s = %s;' % (f.replace('.', '_'), f) for f in math_envs])
if settings['PRECISE_F32']: maths += ['Math.fround']
basic_funcs = ['abort', 'assert', 'asmPrintInt', 'asmPrintFloat'] + [m.replace('.', '_') for m in math_envs]
if settings['RESERVED_FUNCTION_POINTERS'] > 0: basic_funcs.append('jsCall')
if settings['SAFE_HEAP']: basic_funcs += ['SAFE_HEAP_LOAD', 'SAFE_HEAP_STORE', 'SAFE_FT_MASK']
if settings['CHECK_HEAP_ALIGN']: basic_funcs += ['CHECK_ALIGN_2', 'CHECK_ALIGN_4', 'CHECK_ALIGN_8']
if settings['ASSERTIONS']:
basic_funcs += ['nullFunc']
asm_setup += 'function nullFunc(x) { Module["printErr"]("Invalid function pointer called. Perhaps a miscast function pointer (check compilation warnings) or bad vtable lookup (maybe due to derefing a bad pointer, like NULL)?"); abort(x) }\n'
basic_vars = ['STACKTOP', 'STACK_MAX', 'tempDoublePtr', 'ABORT']
basic_float_vars = ['NaN', 'Infinity']
if forwarded_json['Types']['preciseI64MathUsed'] or \
forwarded_json['Functions']['libraryFunctions'].get('llvm_cttz_i32') or \
forwarded_json['Functions']['libraryFunctions'].get('llvm_ctlz_i32'):
basic_vars += ['cttz_i8', 'ctlz_i8']
if settings.get('DLOPEN_SUPPORT'):
for sig in last_forwarded_json['Functions']['tables'].iterkeys():
basic_vars.append('F_BASE_%s' % sig)
asm_setup += ' var F_BASE_%s = %s;\n' % (sig, 'FUNCTION_TABLE_OFFSET' if settings.get('SIDE_MODULE') else '0') + '\n'
if '_rand' in exported_implemented_functions or '_srand' in exported_implemented_functions:
basic_vars += ['___rand_seed']
asm_runtime_funcs = ['stackAlloc', 'stackSave', 'stackRestore', 'setThrew'] + ['setTempRet%d' % i for i in range(10)] + ['getTempRet%d' % i for i in range(10)]
# function tables
function_tables = ['dynCall_' + table for table in last_forwarded_json['Functions']['tables']]
function_tables_impls = []
for sig in last_forwarded_json['Functions']['tables'].iterkeys():
args = ','.join(['a' + str(i) for i in range(1, len(sig))])
arg_coercions = ' '.join(['a' + str(i) + '=' + shared.JS.make_coercion('a' + str(i), sig[i], settings) + ';' for i in range(1, len(sig))])
coerced_args = ','.join([shared.JS.make_coercion('a' + str(i), sig[i], settings) for i in range(1, len(sig))])
ret = ('return ' if sig[0] != 'v' else '') + shared.JS.make_coercion('FUNCTION_TABLE_%s[index&{{{ FTM_%s }}}](%s)' % (sig, sig, coerced_args), sig[0], settings)
function_tables_impls.append('''
function dynCall_%s(index%s%s) {
index = index|0;
%s
%s;
}
''' % (sig, ',' if len(sig) > 1 else '', args, arg_coercions, ret))
for i in range(settings['RESERVED_FUNCTION_POINTERS']):
jsret = ('return ' if sig[0] != 'v' else '') + shared.JS.make_coercion('jsCall(%d%s%s)' % (i, ',' if coerced_args else '', coerced_args), sig[0], settings)
function_tables_impls.append('''
function jsCall_%s_%s(%s) {
%s
%s;
}
''' % (sig, i, args, arg_coercions, jsret))
shared.Settings.copy(settings)
asm_setup += '\n' + shared.JS.make_invoke(sig) + '\n'
basic_funcs.append('invoke_%s' % sig)
if settings.get('DLOPEN_SUPPORT'):
asm_setup += '\n' + shared.JS.make_extcall(sig) + '\n'
basic_funcs.append('extCall_%s' % sig)
# calculate exports
exported_implemented_functions = list(exported_implemented_functions)
exported_implemented_functions.append('runPostSets')
exports = []
if not simple:
for export in exported_implemented_functions + asm_runtime_funcs + function_tables:
exports.append("%s: %s" % (export, export))
exports = '{ ' + ', '.join(exports) + ' }'
else:
exports = '_main'
# calculate globals
try:
del forwarded_json['Variables']['globals']['_llvm_global_ctors'] # not a true variable
except:
pass
# If no named globals, only need externals
global_vars = map(lambda g: g['name'], filter(lambda g: settings['NAMED_GLOBALS'] or g.get('external') or g.get('unIndexable'), forwarded_json['Variables']['globals'].values()))
global_funcs = ['_' + key for key, value in forwarded_json['Functions']['libraryFunctions'].iteritems() if value != 2]
def math_fix(g):
return g if not g.startswith('Math_') else g.split('_')[1]
asm_global_funcs = ''.join([' var ' + g.replace('.', '_') + '=global.' + g + ';\n' for g in maths]) + \
''.join([' var ' + g + '=env.' + math_fix(g) + ';\n' for g in basic_funcs + global_funcs])
asm_global_vars = ''.join([' var ' + g + '=env.' + g + '|0;\n' for g in basic_vars + global_vars]) + \
''.join([' var ' + g + '=+env.' + g + ';\n' for g in basic_float_vars])
# In linkable modules, we need to add some explicit globals for global variables that can be linked and used across modules
if settings.get('MAIN_MODULE') or settings.get('SIDE_MODULE'):
assert settings.get('TARGET_ASMJS_UNKNOWN_EMSCRIPTEN'), 'TODO: support x86 target when linking modules (needs offset of 4 and not 8 here)'
for key, value in forwarded_json['Variables']['globals'].iteritems():
if value.get('linkable'):
init = forwarded_json['Variables']['indexedGlobals'][key] + 8 # 8 is Runtime.GLOBAL_BASE / STATIC_BASE
if settings.get('SIDE_MODULE'): init = '(H_BASE+' + str(init) + ')|0'
asm_global_vars += ' var %s=%s;\n' % (key, str(init))
# sent data
the_global = '{ ' + ', '.join(['"' + math_fix(s) + '": ' + s for s in fundamentals]) + ' }'
sending = '{ ' + ', '.join(['"' + math_fix(s) + '": ' + s for s in basic_funcs + global_funcs + basic_vars + basic_float_vars + global_vars]) + ' }'
# received
if not simple:
receiving = ';\n'.join(['var ' + s + ' = Module["' + s + '"] = asm["' + s + '"]' for s in exported_implemented_functions + function_tables])
else:
receiving = 'var _main = Module["_main"] = asm;'
# finalize
if DEBUG: logging.debug('asm text sizes' + str([map(len, funcs_js), len(asm_setup), len(asm_global_vars), len(asm_global_funcs), len(pre_tables), len('\n'.join(function_tables_impls)), len(function_tables_defs.replace('\n', '\n ')), len(exports), len(the_global), len(sending), len(receiving)]))
funcs_js = ['''
%s
function asmPrintInt(x, y) {
Module.print('int ' + x + ',' + y);// + ' ' + new Error().stack);
}
function asmPrintFloat(x, y) {
Module.print('float ' + x + ',' + y);// + ' ' + new Error().stack);
}
// EMSCRIPTEN_START_ASM
var asm = (function(global, env, buffer) {
%s
var HEAP8 = new global.Int8Array(buffer);
var HEAP16 = new global.Int16Array(buffer);
var HEAP32 = new global.Int32Array(buffer);
var HEAPU8 = new global.Uint8Array(buffer);
var HEAPU16 = new global.Uint16Array(buffer);
var HEAPU32 = new global.Uint32Array(buffer);
var HEAPF32 = new global.Float32Array(buffer);
var HEAPF64 = new global.Float64Array(buffer);
''' % (asm_setup, "'use asm';" if not forwarded_json['Types']['hasInlineJS'] and not settings['SIDE_MODULE'] and settings['ASM_JS'] == 1 else "'almost asm';") + '\n' + asm_global_vars + '''
var __THREW__ = 0;
var threwValue = 0;
var setjmpId = 0;
var undef = 0;
var tempInt = 0, tempBigInt = 0, tempBigIntP = 0, tempBigIntS = 0, tempBigIntR = 0.0, tempBigIntI = 0, tempBigIntD = 0, tempValue = 0, tempDouble = 0.0;
''' + ''.join(['''
var tempRet%d = 0;''' % i for i in range(10)]) + '\n' + asm_global_funcs] + [' var tempFloat = %s;\n' % ('Math_fround(0)' if settings.get('PRECISE_F32') else '0.0')] + ([' const f0 = Math_fround(0);\n'] if settings.get('PRECISE_F32') else []) + ['''
// EMSCRIPTEN_START_FUNCS
function stackAlloc(size) {
size = size|0;
var ret = 0;
ret = STACKTOP;
STACKTOP = (STACKTOP + size)|0;
''' + ('STACKTOP = (STACKTOP + 3)&-4;' if settings['TARGET_X86'] else 'STACKTOP = (STACKTOP + 7)&-8;') + '''
return ret|0;
}
function stackSave() {
return STACKTOP|0;
}
function stackRestore(top) {
top = top|0;
STACKTOP = top;
}
function setThrew(threw, value) {
threw = threw|0;
value = value|0;
if ((__THREW__|0) == 0) {
__THREW__ = threw;
threwValue = value;
}
}
function copyTempFloat(ptr) {
ptr = ptr|0;
HEAP8[tempDoublePtr>>0] = HEAP8[ptr>>0];
HEAP8[tempDoublePtr+1>>0] = HEAP8[ptr+1>>0];
HEAP8[tempDoublePtr+2>>0] = HEAP8[ptr+2>>0];
HEAP8[tempDoublePtr+3>>0] = HEAP8[ptr+3>>0];
}
function copyTempDouble(ptr) {
ptr = ptr|0;
HEAP8[tempDoublePtr>>0] = HEAP8[ptr>>0];
HEAP8[tempDoublePtr+1>>0] = HEAP8[ptr+1>>0];
HEAP8[tempDoublePtr+2>>0] = HEAP8[ptr+2>>0];
HEAP8[tempDoublePtr+3>>0] = HEAP8[ptr+3>>0];
HEAP8[tempDoublePtr+4>>0] = HEAP8[ptr+4>>0];
HEAP8[tempDoublePtr+5>>0] = HEAP8[ptr+5>>0];
HEAP8[tempDoublePtr+6>>0] = HEAP8[ptr+6>>0];
HEAP8[tempDoublePtr+7>>0] = HEAP8[ptr+7>>0];
}
''' + ''.join(['''
function setTempRet%d(value) {
value = value|0;
tempRet%d = value;
}
''' % (i, i) for i in range(10)]) + ''.join(['''
function getTempRet%d() {
return tempRet%d|0;
}
''' % (i, i) for i in range(10)])] + [PostSets.js + '\n'] + funcs_js + ['''
%s
return %s;
})
// EMSCRIPTEN_END_ASM
(%s, %s, buffer);
%s;
''' % (pre_tables + '\n'.join(function_tables_impls) + '\n' + function_tables_defs.replace('\n', '\n '), exports, the_global, sending, receiving)]
if not settings.get('SIDE_MODULE'):
funcs_js.append('''
Runtime.stackAlloc = asm['stackAlloc'];
Runtime.stackSave = asm['stackSave'];
Runtime.stackRestore = asm['stackRestore'];
Runtime.setTempRet0 = asm['setTempRet0'];
Runtime.getTempRet0 = asm['getTempRet0'];
''')
# Set function table masks
masks = {}
max_mask = 0
for sig, table in last_forwarded_json['Functions']['tables'].iteritems():
mask = table.count(',')
masks[sig] = str(mask)
max_mask = max(mask, max_mask)
def function_table_maskize(js, masks):
def fix(m):
sig = m.groups(0)[0]
return masks[sig]
return re.sub(r'{{{ FTM_([\w\d_$]+) }}}', lambda m: fix(m), js) # masks[m.groups(0)[0]]
funcs_js = map(lambda js: function_table_maskize(js, masks), funcs_js)
if settings.get('DLOPEN_SUPPORT'):
funcs_js.append('''
asm.maxFunctionIndex = %(max_mask)d;
DLFCN.registerFunctions(asm, %(max_mask)d+1, %(sigs)s, Module);
Module.SYMBOL_TABLE = SYMBOL_TABLE;
''' % { 'max_mask': max_mask, 'sigs': str(map(str, last_forwarded_json['Functions']['tables'].keys())) })
else:
function_tables_defs = '\n'.join([table for table in last_forwarded_json['Functions']['tables'].itervalues()])
outfile.write(function_tables_defs)
funcs_js = ['''
// EMSCRIPTEN_START_FUNCS
'''] + funcs_js + ['''
// EMSCRIPTEN_END_FUNCS
''']
# Create symbol table for self-dlopen
if settings.get('DLOPEN_SUPPORT'):
symbol_table = {}
for k, v in forwarded_json['Variables']['indexedGlobals'].iteritems():
if forwarded_json['Variables']['globals'][k]['named']:
symbol_table[k] = str(v + forwarded_json['Runtime']['GLOBAL_BASE'])
for raw in last_forwarded_json['Functions']['tables'].itervalues():
if raw == '': continue
table = map(string.strip, raw[raw.find('[')+1:raw.find(']')].split(","))
for i in range(len(table)):
value = table[i]
if value != '0':
if settings.get('SIDE_MODULE'):
symbol_table[value] = 'FUNCTION_TABLE_OFFSET+' + str(i)
else:
symbol_table[value] = str(i)
outfile.write("var SYMBOL_TABLE = %s;" % json.dumps(symbol_table).replace('"', ''))
for i in range(len(funcs_js)): # do this loop carefully to save memory
funcs_js_item = funcs_js[i]
funcs_js[i] = None
funcs_js_item = indexize(funcs_js_item)
funcs_js_item = blockaddrsize(funcs_js_item)
outfile.write(funcs_js_item)
funcs_js = None
outfile.write(indexize(post))
if DEBUG: logging.debug(' emscript: phase 3 took %s seconds' % (time.time() - t))
outfile.close()
# emscript_fast: emscript'en code using the 'fast' compilation path, using
# an LLVM backend
# FIXME: this is just a copy-paste of normal emscript(), and we trample it
# if the proper env var is set (see below). we should refactor to
# share code between the two, once emscript_fast stabilizes (or,
# leaving it separate like it is will make it trivial to rip out
# if the experiment fails)
def emscript_fast(infile, settings, outfile, libraries=[], compiler_engine=None,
jcache=None, temp_files=None, DEBUG=None, DEBUG_CACHE=None):
"""Runs the emscripten LLVM-to-JS compiler. We parallelize as much as possible
Args:
infile: The path to the input LLVM assembly file.
settings: JSON-formatted settings that override the values
defined in src/settings.js.
outfile: The file where the output is written.
"""
assert(settings['ASM_JS'])
# Overview:
# * Run LLVM backend to emit JS. JS includes function bodies, memory initializer,
# and various metadata
# * Run compiler.js on the metadata to emit the shell js code, pre/post-ambles,
# JS library dependencies, etc.
temp_js = temp_files.get('.4.js').name
backend_compiler = os.path.join(shared.LLVM_ROOT, 'llc')
backend_args = [backend_compiler, infile, '-march=js', '-filetype=asm', '-o', temp_js]
if settings['PRECISE_F32']:
backend_args += ['-emscripten-precise-f32']
if settings['WARN_UNALIGNED']:
backend_args += ['-emscripten-warn-unaligned']
if settings['RESERVED_FUNCTION_POINTERS'] > 0:
backend_args += ['-emscripten-reserved-function-pointers=%d' % settings['RESERVED_FUNCTION_POINTERS']]
if settings['ASSERTIONS'] > 0:
backend_args += ['-emscripten-assertions=%d' % settings['ASSERTIONS']]
if settings['ALIASING_FUNCTION_POINTERS'] == 0:
backend_args += ['-emscripten-no-aliasing-function-pointers']
backend_args += ['-O' + str(settings['OPT_LEVEL'])]
if DEBUG:
logging.debug('emscript: llvm backend: ' + ' '.join(backend_args))
t = time.time()
shared.jsrun.timeout_run(subprocess.Popen(backend_args, stdout=subprocess.PIPE))
if DEBUG:
logging.debug(' emscript: llvm backend took %s seconds' % (time.time() - t))
t = time.time()
# Split up output
backend_output = open(temp_js).read()
#if DEBUG: print >> sys.stderr, backend_output
start_funcs_marker = '// EMSCRIPTEN_START_FUNCTIONS'
end_funcs_marker = '// EMSCRIPTEN_END_FUNCTIONS'
metadata_split_marker = '// EMSCRIPTEN_METADATA'
start_funcs = backend_output.index(start_funcs_marker)
end_funcs = backend_output.rindex(end_funcs_marker)
metadata_split = backend_output.rindex(metadata_split_marker)
funcs = backend_output[start_funcs+len(start_funcs_marker):end_funcs]
metadata_raw = backend_output[metadata_split+len(metadata_split_marker):]
#if DEBUG: print >> sys.stderr, "METAraw", metadata_raw
metadata = json.loads(metadata_raw)
mem_init = backend_output[end_funcs+len(end_funcs_marker):metadata_split]
#if DEBUG: print >> sys.stderr, "FUNCS", funcs
#if DEBUG: print >> sys.stderr, "META", metadata
#if DEBUG: print >> sys.stderr, "meminit", mem_init
# function table masks
table_sizes = {}
for k, v in metadata['tables'].iteritems():
table_sizes[k] = str(v.count(',')) # undercounts by one, but that is what we want
#if settings['ASSERTIONS'] >= 2 and table_sizes[k] == 0:
# print >> sys.stderr, 'warning: no function pointers with signature ' + k + ', but there is a call, which will abort if it occurs (this can result from undefined behavior, check for compiler warnings on your source files and consider -Werror)'
funcs = re.sub(r"#FM_(\w+)#", lambda m: table_sizes[m.groups(0)[0]], funcs)
# fix +float into float.0, if not running js opts
if not settings['RUNNING_JS_OPTS']:
def fix_dot_zero(m):
num = m.group(3)
# TODO: handle 0x floats?
if num.find('.') < 0:
e = num.find('e');
if e < 0:
num += '.0'
else:
num = num[:e] + '.0' + num[e:]
return m.group(1) + m.group(2) + num
funcs = re.sub(r'([(=,+\-*/%<>:?] *)\+(-?)((0x)?[0-9a-f]*\.?[0-9]+([eE][-+]?[0-9]+)?)', lambda m: fix_dot_zero(m), funcs)
# js compiler
if DEBUG: logging.debug('emscript: js compiler glue')
# Settings changes
assert settings['TARGET_ASMJS_UNKNOWN_EMSCRIPTEN'] == 1
settings['TARGET_ASMJS_UNKNOWN_EMSCRIPTEN'] = 2
i64_funcs = ['i64Add', 'i64Subtract', '__muldi3', '__divdi3', '__udivdi3', '__remdi3', '__uremdi3']
for i64_func in i64_funcs:
if i64_func in metadata['declares']:
settings['PRECISE_I64_MATH'] = 2
break
metadata['declares'] = filter(lambda i64_func: i64_func not in ['getHigh32', 'setHigh32', '__muldi3', '__divdi3', '__remdi3', '__udivdi3', '__uremdi3'], metadata['declares']) # FIXME: do these one by one as normal js lib funcs
# Integrate info from backend
settings['DEFAULT_LIBRARY_FUNCS_TO_INCLUDE'] = list(
set(settings['DEFAULT_LIBRARY_FUNCS_TO_INCLUDE'] + map(shared.JS.to_nice_ident, metadata['declares'])).difference(
map(lambda x: x[1:], metadata['implementedFunctions'])
)
) + map(lambda x: x[1:], metadata['externs'])
if metadata['simd']:
settings['SIMD'] = 1
if not metadata['canValidate'] and settings['ASM_JS'] != 2:
logging.warning('disabling asm.js validation due to use of non-supported features')
settings['ASM_JS'] = 2
# Save settings to a file to work around v8 issue 1579
settings_file = temp_files.get('.txt').name
def save_settings():
global settings_text
settings_text = json.dumps(settings, sort_keys=True)
s = open(settings_file, 'w')
s.write(settings_text)
s.close()
save_settings()
# Call js compiler
if DEBUG: t = time.time()
out = jsrun.run_js(path_from_root('src', 'compiler.js'), compiler_engine, [settings_file, ';', 'glue'] + libraries, stdout=subprocess.PIPE, stderr=STDERR_FILE,
cwd=path_from_root('src'))
assert '//FORWARDED_DATA:' in out, 'Did not receive forwarded data in pre output - process failed?'
glue, forwarded_data = out.split('//FORWARDED_DATA:')
if DEBUG:
logging.debug(' emscript: glue took %s seconds' % (time.time() - t))
t = time.time()
last_forwarded_json = forwarded_json = json.loads(forwarded_data)
# merge in information from llvm backend
last_forwarded_json['Functions']['tables'] = metadata['tables']
'''indexed_functions = set()
for key in forwarded_json['Functions']['indexedFunctions'].iterkeys():
indexed_functions.add(key)'''
pre, post = glue.split('// EMSCRIPTEN_END_FUNCS')
#print >> sys.stderr, 'glue:', pre, '\n\n||||||||||||||||\n\n', post, '...............'
# memory and global initializers
global_initializers = ', '.join(map(lambda i: '{ func: function() { %s() } }' % i, metadata['initializers']))
pre = pre.replace('STATICTOP = STATIC_BASE + 0;', '''STATICTOP = STATIC_BASE + Runtime.alignMemory(%d);
/* global initializers */ __ATINIT__.push(%s);
%s''' % (mem_init.count(',')+1, global_initializers, mem_init)) # XXX wrong size calculation!
funcs_js = [funcs]
if settings.get('ASM_JS'):
parts = pre.split('// ASM_LIBRARY FUNCTIONS\n')
if len(parts) > 1:
pre = parts[0]
funcs_js.append(parts[1])
# merge forwarded data
assert settings.get('ASM_JS'), 'fastcomp is asm.js only'
settings['EXPORTED_FUNCTIONS'] = forwarded_json['EXPORTED_FUNCTIONS']
all_exported_functions = set(settings['EXPORTED_FUNCTIONS']) # both asm.js and otherwise
for additional_export in settings['DEFAULT_LIBRARY_FUNCS_TO_INCLUDE']: # additional functions to export from asm, if they are implemented
all_exported_functions.add('_' + additional_export)
exported_implemented_functions = set(metadata['exports'])
export_bindings = settings['EXPORT_BINDINGS']
export_all = settings['EXPORT_ALL']
for key in metadata['implementedFunctions'] + forwarded_json['Functions']['implementedFunctions'].keys(): # XXX perf
if key in all_exported_functions or export_all or (export_bindings and key.startswith('_emscripten_bind')):
exported_implemented_functions.add(key)
implemented_functions = set(metadata['implementedFunctions'])
# Add named globals
named_globals = '\n'.join(['var %s = %s;' % (k, v) for k, v in metadata['namedGlobals'].iteritems()])
pre = pre.replace('// === Body ===', '// === Body ===\n' + named_globals + '\n')
#if DEBUG: outfile.write('// pre\n')
outfile.write(pre)
pre = None
#if DEBUG: outfile.write('// funcs\n')
if settings.get('ASM_JS'):
# Move preAsms to their right place
def move_preasm(m):
contents = m.groups(0)[0]
outfile.write(contents + '\n')
return ''
funcs_js[1] = re.sub(r'/\* PRE_ASM \*/(.*)\n', lambda m: move_preasm(m), funcs_js[1])
funcs_js += ['\n// EMSCRIPTEN_END_FUNCS\n']
simple = os.environ.get('EMCC_SIMPLE_ASM')
class Counter:
i = 0
j = 0
if 'pre' in last_forwarded_json['Functions']['tables']:
pre_tables = last_forwarded_json['Functions']['tables']['pre']
del last_forwarded_json['Functions']['tables']['pre']
else:
pre_tables = ''
def unfloat(s):
return 'd' if s == 'f' else s # lower float to double for ffis
if settings['ASSERTIONS'] >= 2:
debug_tables = {}
def make_table(sig, raw):
params = ','.join(['p%d' % p for p in range(len(sig)-1)])
coerced_params = ','.join([shared.JS.make_coercion('p%d', unfloat(sig[p+1]), settings) % p for p in range(len(sig)-1)])
coercions = ';'.join(['p%d = %s' % (p, shared.JS.make_coercion('p%d' % p, sig[p+1], settings)) for p in range(len(sig)-1)]) + ';'
def make_func(name, code):
return 'function %s(%s) { %s %s }' % (name, params, coercions, code)
def make_bad(target=None):
i = Counter.i
Counter.i += 1
if target is None: target = i
name = 'b' + str(i)
if not settings['ASSERTIONS']:
code = 'abort(%s);' % target
else:
code = 'nullFunc_' + sig + '(%d);' % target
if sig[0] != 'v':
code += 'return %s' % shared.JS.make_initializer(sig[0], settings) + ';'
return name, make_func(name, code)
bad, bad_func = make_bad() # the default bad func
if settings['ASSERTIONS'] <= 1:
Counter.pre = [bad_func]
else:
Counter.pre = []
start = raw.index('[')
end = raw.rindex(']')
body = raw[start+1:end].split(',')
for j in range(settings['RESERVED_FUNCTION_POINTERS']):
curr = 'jsCall_%s_%s' % (sig, j)
body[settings['FUNCTION_POINTER_ALIGNMENT'] * (1 + j)] = curr
implemented_functions.add(curr)
Counter.j = 0
def fix_item(item):
Counter.j += 1
newline = Counter.j % 30 == 29
if item == '0':
if settings['ASSERTIONS'] <= 1:
return bad if not newline else (bad + '\n')
else:
specific_bad, specific_bad_func = make_bad(Counter.j-1)
Counter.pre.append(specific_bad_func)
return specific_bad if not newline else (specific_bad + '\n')
if item not in implemented_functions:
# this is imported into asm, we must wrap it
call_ident = item
if call_ident in metadata['redirects']: call_ident = metadata['redirects'][call_ident]
if not call_ident.startswith('_') and not call_ident.startswith('Math_'): call_ident = '_' + call_ident
code = call_ident + '(' + coerced_params + ')'
if sig[0] != 'v':
# ffis cannot return float
if sig[0] == 'f': code = '+' + code
code = 'return ' + shared.JS.make_coercion(code, sig[0], settings)
code += ';'
Counter.pre.append(make_func(item + '__wrapper', code))
return item + '__wrapper'
return item if not newline else (item + '\n')
if settings['ASSERTIONS'] >= 2:
debug_tables[sig] = body
body = ','.join(map(fix_item, body))
return ('\n'.join(Counter.pre), ''.join([raw[:start+1], body, raw[end:]]))
infos = [make_table(sig, raw) for sig, raw in last_forwarded_json['Functions']['tables'].iteritems()]
Counter.pre = []