blob: 23c2945b5e073f9cdd5f4051e93ac660ff352bbb [file] [log] [blame]
#!/usr/bin/env python2
# Copyright 2015 WebAssembly Community Group participants
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import json
import os
import shutil
import subprocess
import sys
from scripts.test.support import run_command, split_wast
from scripts.test.shared import (
ASM2WASM, BIN_DIR, EMCC, MOZJS, NATIVECC, NATIVEXX, NODEJS, S2WASM_EXE,
WASM_AS, WASM_OPT, WASM_SHELL, WASM_SHELL_EXE, WASM_DIS,
binary_format_check, delete_from_orbit, fail, fail_with_error,
fail_if_not_identical, fail_if_not_contained, has_vanilla_emcc,
has_vanilla_llvm, minify_check, num_failures, options, tests,
requested, warnings
)
import scripts.test.s2wasm as s2wasm
if options.interpreter:
print '[ using wasm interpreter at "%s" ]' % options.interpreter
assert os.path.exists(options.interpreter), 'interpreter not found'
# tests
print '[ checking --help is useful... ]\n'
not_executable_suffix = ['.txt', '.js', '.ilk', '.pdb', '.dll']
executables = sorted(filter(lambda x: not any(x.endswith(s) for s in
not_executable_suffix) and os.path.isfile(x),
os.listdir(options.binaryen_bin)))
for e in executables:
print '.. %s --help' % e
out, err = subprocess.Popen([os.path.join(options.binaryen_bin, e), '--help'],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE).communicate()
assert len(out) == 0, 'Expected no stdout, got:\n%s' % out
assert e.replace('.exe', '') in err, 'Expected help to contain program name, got:\n%s' % err
assert len(err.split('\n')) > 8, 'Expected some help, got:\n%s' % err
print '\n[ checking wasm-opt -o notation... ]\n'
wast = os.path.join(options.binaryen_test, 'hello_world.wast')
delete_from_orbit('a.wast')
cmd = WASM_OPT + [wast, '-o', 'a.wast', '-S']
run_command(cmd)
fail_if_not_identical(open('a.wast').read(), open(wast).read())
print '\n[ checking wasm-opt binary reading/writing... ]\n'
shutil.copyfile(os.path.join(options.binaryen_test, 'hello_world.wast'), 'a.wast')
delete_from_orbit('a.wasm')
delete_from_orbit('b.wast')
run_command(WASM_OPT + ['a.wast', '-o', 'a.wasm'])
assert open('a.wasm', 'rb').read()[0] == '\0', 'we emit binary by default'
run_command(WASM_OPT + ['a.wasm', '-o', 'b.wast', '-S'])
assert open('b.wast', 'rb').read()[0] != '\0', 'we emit text with -S'
print '\n[ checking wasm-opt passes... ]\n'
for t in sorted(os.listdir(os.path.join(options.binaryen_test, 'passes'))):
if t.endswith('.wast'):
print '..', t
passname = os.path.basename(t).replace('.wast', '')
opts = ['-' + passname] if passname.startswith('O') else ['--' + p for p in passname.split('_')]
t = os.path.join(options.binaryen_test, 'passes', t)
actual = ''
for module, asserts in split_wast(t):
assert len(asserts) == 0
with open('split.wast', 'w') as o: o.write(module)
cmd = WASM_OPT + opts + ['split.wast', '--print']
actual += run_command(cmd)
# also check debug mode output is valid
debugged = run_command(cmd + ['--debug'], stderr=subprocess.PIPE)
fail_if_not_contained(actual, debugged)
fail_if_not_identical(actual, open(os.path.join(options.binaryen_test, 'passes', passname + '.txt'), 'rb').read())
print '[ checking asm2wasm testcases... ]\n'
for asm in tests:
if asm.endswith('.asm.js'):
for precise in [1, 0]:
for opts in [1, 0]:
cmd = ASM2WASM + [os.path.join(options.binaryen_test, asm)]
wasm = asm.replace('.asm.js', '.fromasm')
if not precise:
cmd += ['--imprecise', '--ignore-implicit-traps']
wasm += '.imprecise'
if not opts:
wasm += '.no-opts'
if precise:
cmd += ['-O0'] # test that -O0 does nothing
else:
cmd += ['-O']
if 'debugInfo' in asm:
cmd += ['-g']
if precise and opts:
# test mem init importing
open('a.mem', 'wb').write(asm)
cmd += ['--mem-init=a.mem']
if asm[0] == 'e':
cmd += ['--mem-base=1024']
if 'i64' in asm or 'wasm-only' in asm:
cmd += ['--wasm-only']
wasm = os.path.join(options.binaryen_test, wasm)
print '..', asm, wasm
actual = run_command(cmd)
# verify output
if not os.path.exists(wasm):
fail_with_error('output .wast file %s does not exist' % wasm)
expected = open(wasm, 'rb').read()
if actual != expected:
fail(actual, expected)
binary_format_check(wasm, verify_final_result=False)
# verify in wasm
if options.interpreter:
# remove imports, spec interpreter doesn't know what to do with them
subprocess.check_call(WASM_OPT + ['--remove-imports', wasm], stdout=open('ztemp.wast', 'w'), stderr=subprocess.PIPE)
proc = subprocess.Popen([options.interpreter, 'ztemp.wast'], stderr=subprocess.PIPE)
out, err = proc.communicate()
if proc.returncode != 0:
try: # to parse the error
reported = err.split(':')[1]
start, end = reported.split('-')
start_line, start_col = map(int, start.split('.'))
lines = open('ztemp.wast').read().split('\n')
print
print '='*80
print lines[start_line-1]
print (' '*(start_col-1)) + '^'
print (' '*(start_col-2)) + '/_\\'
print '='*80
print err
except Exception, e:
fail_with_error('wasm interpreter error: ' + err) # failed to pretty-print
fail_with_error('wasm interpreter error')
print '\n[ checking asm2wasm binary reading/writing... ]\n'
asmjs = os.path.join(options.binaryen_test, 'hello_world.asm.js')
delete_from_orbit('a.wasm')
delete_from_orbit('b.wast')
run_command(ASM2WASM + [asmjs, '-o', 'a.wasm'])
assert open('a.wasm', 'rb').read()[0] == '\0', 'we emit binary by default'
run_command(ASM2WASM + [asmjs, '-o', 'b.wast', '-S'])
assert open('b.wast', 'rb').read()[0] != '\0', 'we emit text with -S'
print '\n[ checking wasm-opt parsing & printing... ]\n'
for t in sorted(os.listdir(os.path.join(options.binaryen_test, 'print'))):
if t.endswith('.wast'):
print '..', t
wasm = os.path.basename(t).replace('.wast', '')
cmd = WASM_OPT + [os.path.join(options.binaryen_test, 'print', t), '--print']
print ' ', ' '.join(cmd)
actual, err = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()
fail_if_not_identical(actual, open(os.path.join(options.binaryen_test, 'print', wasm + '.txt')).read())
cmd = WASM_OPT + [os.path.join(options.binaryen_test, 'print', t), '--print-minified']
print ' ', ' '.join(cmd)
actual, err = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()
fail_if_not_identical(actual.strip(), open(os.path.join(options.binaryen_test, 'print', wasm + '.minified.txt')).read().strip())
print '\n[ checking wasm-opt testcases... ]\n'
for t in tests:
if t.endswith('.wast') and not t.startswith('spec'):
print '..', t
t = os.path.join(options.binaryen_test, t)
f = t + '.from-wast'
cmd = WASM_OPT + [t, '--print']
actual = run_command(cmd)
actual = actual.replace('printing before:\n', '')
expected = open(f, 'rb').read()
if actual != expected:
fail(actual, expected)
binary_format_check(t, wasm_as_args=['-g']) # test with debuginfo
binary_format_check(t, wasm_as_args=[], binary_suffix='.fromBinary.noDebugInfo') # test without debuginfo
minify_check(t)
print '\n[ checking wasm-dis on provided binaries... ]\n'
for t in tests:
if t.endswith('.wasm') and not t.startswith('spec'):
print '..', t
t = os.path.join(options.binaryen_test, t)
cmd = WASM_DIS + [t]
actual = run_command(cmd)
with open(t + '.fromBinary') as f:
expected = f.read()
if actual != expected:
fail(actual, expected)
print '\n[ checking wasm-shell spec testcases... ]\n'
if len(requested) == 0:
BLACKLIST = ['memory.wast', 'binary.wast'] # FIXME we support old and new memory formats, for now, until 0xc, and so can't pass this old-style test.
# FIXME to update the spec to 0xd, we need to implement (register "name") for import.wast
spec_tests = [os.path.join('spec', t) for t in sorted(os.listdir(os.path.join(options.binaryen_test, 'spec'))) if t not in BLACKLIST]
else:
spec_tests = requested[:]
for t in spec_tests:
if t.startswith('spec') and t.endswith('.wast'):
print '..', t
wast = os.path.join(options.binaryen_test, t)
# skip checks for some tests
if os.path.basename(wast) in ['linking.wast', 'nop.wast', 'stack.wast', 'typecheck.wast', 'unwind.wast']: # FIXME
continue
def run_spec_test(wast):
cmd = WASM_SHELL + [wast]
# we must skip the stack machine portions of spec tests or apply other extra args
extra = {
}
cmd = cmd + (extra.get(os.path.basename(wast)) or [])
return run_command(cmd, stderr=subprocess.PIPE)
def check_expected(actual, expected):
if expected and os.path.exists(expected):
expected = open(expected).read()
# fix it up, our pretty (i32.const 83) must become compared to a homely 83 : i32
def fix(x):
x = x.strip()
if not x: return x
v, t = x.split(' : ')
if v.endswith('.'): v = v[:-1] # remove trailing '.'
return '(' + t + '.const ' + v + ')'
expected = '\n'.join(map(fix, expected.split('\n')))
print ' (using expected output)'
actual = actual.strip()
expected = expected.strip()
if actual != expected:
fail(actual, expected)
expected = os.path.join(options.binaryen_test, 'spec', 'expected-output', os.path.basename(wast) + '.log')
# some spec tests should fail (actual process failure, not just assert_invalid)
try:
actual = run_spec_test(wast)
except Exception, e:
if ('wasm-validator error' in str(e) or 'parse exception' in str(e)) and '.fail.' in t:
print '<< test failed as expected >>'
continue # don't try all the binary format stuff TODO
else:
fail_with_error(str(e))
check_expected(actual, expected)
# skip binary checks for tests that reuse previous modules by name, as that's a wast-only feature
if os.path.basename(wast) in ['exports.wast']: # FIXME
continue
# we must ignore some binary format splits
splits_to_skip = {
'func.wast': [2],
'return.wast': [2]
}
# check binary format. here we can verify execution of the final result, no need for an output verification
split_num = 0
if os.path.basename(wast) not in []: # avoid some tests with things still being sorted out in the spec
actual = ''
for module, asserts in split_wast(wast):
skip = splits_to_skip.get(os.path.basename(wast)) or []
if split_num in skip:
print ' skipping split module', split_num - 1
split_num += 1
continue
print ' testing split module', split_num
split_num += 1
with open('split.wast', 'w') as o: o.write(module + '\n' + '\n'.join(asserts))
run_spec_test('split.wast') # before binary stuff - just check it's still ok split out
result_wast = binary_format_check('split.wast', verify_final_result=False)
# add the asserts, and verify that the test still passes
open(result_wast, 'a').write('\n' + '\n'.join(asserts))
actual += run_spec_test(result_wast)
# compare all the outputs to the expected output
check_expected(actual, os.path.join(options.binaryen_test, 'spec', 'expected-output', os.path.basename(wast) + '.log'))
if NODEJS:
print '\n[ checking binaryen.js testcases... ]\n'
for s in sorted(os.listdir(os.path.join(options.binaryen_test, 'binaryen.js'))):
if not s.endswith('.js'): continue
print s
f = open('a.js', 'w')
f.write(open(os.path.join(options.binaryen_bin, 'binaryen.js')).read())
f.write(open(os.path.join(options.binaryen_test, 'binaryen.js', s)).read())
f.close()
cmd = [NODEJS, 'a.js']
out = run_command(cmd)
expected = open(os.path.join(options.binaryen_test, 'binaryen.js', s + '.txt')).read()
if expected not in out:
fail(out, expected)
s2wasm.test_s2wasm()
s2wasm.test_linker()
print '\n[ running validation tests... ]\n'
# Ensure the tests validate by default
cmd = WASM_AS + [os.path.join(options.binaryen_test, 'validator', 'invalid_export.wast')]
run_command(cmd)
cmd = WASM_AS + [os.path.join(options.binaryen_test, 'validator', 'invalid_import.wast')]
run_command(cmd)
cmd = WASM_AS + ['--validate=web', os.path.join(options.binaryen_test, 'validator', 'invalid_export.wast')]
run_command(cmd, expected_status=1)
cmd = WASM_AS + ['--validate=web', os.path.join(options.binaryen_test, 'validator', 'invalid_import.wast')]
run_command(cmd, expected_status=1)
cmd = WASM_AS + ['--validate=none', os.path.join(options.binaryen_test, 'validator', 'invalid_return.wast')]
run_command(cmd)
if options.torture and options.test_waterfall:
print '\n[ checking torture testcases... ]\n'
unexpected_result_count = 0
import test.waterfall.src.link_assembly_files as link_assembly_files
s2wasm_torture_out = os.path.abspath(os.path.join(options.binaryen_test, 's2wasm-torture-out'))
if os.path.isdir(s2wasm_torture_out):
shutil.rmtree(s2wasm_torture_out)
os.mkdir(s2wasm_torture_out)
unexpected_result_count += link_assembly_files.run(
linker=os.path.abspath(S2WASM_EXE),
files=os.path.abspath(os.path.join(options.binaryen_test, 'torture-s', '*.s')),
fails=os.path.abspath(os.path.join(options.binaryen_test, 's2wasm_known_gcc_test_failures.txt')),
out=s2wasm_torture_out)
assert os.path.isdir(s2wasm_torture_out), 'Expected output directory %s' % s2wasm_torture_out
import test.waterfall.src.execute_files as execute_files
unexpected_result_count += execute_files.run(
runner=os.path.abspath(WASM_SHELL_EXE),
files=os.path.abspath(os.path.join(s2wasm_torture_out, '*.wast')),
fails=os.path.abspath(os.path.join(options.binaryen_test, 's2wasm_known_binaryen_shell_test_failures.txt')),
out='',
wasmjs='')
shutil.rmtree(s2wasm_torture_out)
if unexpected_result_count:
fail('%s failures' % unexpected_result_count, '0 failures')
if has_vanilla_emcc and has_vanilla_llvm and 0:
print '\n[ checking emcc WASM_BACKEND testcases...]\n'
try:
if has_vanilla_llvm:
os.environ['LLVM'] = BIN_DIR # use the vanilla LLVM
else:
# if we did not set vanilla llvm, then we must set this env var to make emcc use the wasm backend.
# (if we are using vanilla llvm, things should just work)
print '(not using vanilla llvm, so setting env var to tell emcc to use wasm backend)'
os.environ['EMCC_WASM_BACKEND'] = '1'
VANILLA_EMCC = os.path.join(options.binaryen_test, 'emscripten', 'emcc')
# run emcc to make sure it sets itself up properly, if it was never run before
command = [VANILLA_EMCC, '-v']
print '____' + ' '.join(command)
subprocess.check_call(command)
for c in sorted(os.listdir(os.path.join(options.binaryen_test, 'wasm_backend'))):
if not c.endswith('cpp'): continue
print '..', c
base = c.replace('.cpp', '').replace('.c', '')
expected = open(os.path.join(options.binaryen_test, 'wasm_backend', base + '.txt')).read()
for opts in [[], ['-O1'], ['-O2']]:
only = [] if opts != ['-O1'] or '_only' not in base else ['-s', 'ONLY_MY_CODE=1'] # only my code is a hack we used early in wasm backend dev, which somehow worked, but only with -O1
command = [VANILLA_EMCC, '-o', 'a.wasm.js', os.path.join(options.binaryen_test, 'wasm_backend', c)] + opts + only
print '....' + ' '.join(command)
if os.path.exists('a.wasm.js'): os.unlink('a.wasm.js')
subprocess.check_call(command)
if NODEJS:
print ' (check in node)'
cmd = [NODEJS, 'a.wasm.js']
out = run_command(cmd)
if out.strip() != expected.strip():
fail(out, expected)
finally:
if has_vanilla_llvm:
del os.environ['LLVM']
else:
del os.environ['EMCC_WASM_BACKEND']
print '\n[ checking example testcases... ]\n'
if options.run_gcc_tests:
print '\n[ checking native gcc testcases...]\n'
if not NATIVECC or not NATIVEXX:
fail_with_error('Native compiler (e.g. gcc/g++) was not found in PATH!')
else:
for t in sorted(os.listdir(os.path.join(options.binaryen_test, 'example'))):
output_file = os.path.join(options.binaryen_bin, 'example')
cmd = ['-I' + os.path.join(options.binaryen_root, 'src'), '-g', '-lasmjs', '-lsupport', '-L' + os.path.join(options.binaryen_bin, '..', 'lib'), '-pthread', '-o', output_file]
if t.endswith('.txt'):
# check if there is a trace in the file, if so, we should build it
out = subprocess.Popen([os.path.join('scripts', 'clean_c_api_trace.py'), os.path.join(options.binaryen_test, 'example', t)], stdout=subprocess.PIPE).communicate()[0]
if len(out) == 0:
print ' (no trace in ', t, ')'
continue
print ' (will check trace in ', t, ')'
src = 'trace.cpp'
with open(src, 'w') as o: o.write(out)
expected = os.path.join(options.binaryen_test, 'example', t + '.txt')
else:
src = os.path.join(options.binaryen_test, 'example', t)
expected = os.path.join(options.binaryen_test, 'example', '.'.join(t.split('.')[:-1]) + '.txt')
if src.endswith(('.c', '.cpp')):
# build the C file separately
extra = [NATIVECC, src, '-c', '-o', 'example.o',
'-I' + os.path.join(options.binaryen_root, 'src'), '-g', '-L' + os.path.join(options.binaryen_bin, '..', 'lib'), '-pthread']
print 'build: ', ' '.join(extra)
subprocess.check_call(extra)
# Link against the binaryen C library DSO, using an executable-relative rpath
cmd = ['example.o', '-lbinaryen'] + cmd + ['-Wl,-rpath=$ORIGIN/../lib']
else:
continue
print ' ', t, src, expected
if os.environ.get('COMPILER_FLAGS'):
for f in os.environ.get('COMPILER_FLAGS').split(' '):
cmd.append(f)
cmd = [NATIVEXX, '-std=c++11'] + cmd
try:
print 'link: ', ' '.join(cmd)
subprocess.check_call(cmd)
print 'run...', output_file
proc = subprocess.Popen([output_file], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
actual, err = proc.communicate()
assert proc.returncode == 0, [proc.returncode, actual, err]
finally:
os.remove(output_file)
if sys.platform == 'darwin':
# Also removes debug directory produced on Mac OS
shutil.rmtree(output_file + '.dSYM')
expected = open(expected).read()
if actual != expected:
fail(actual, expected)
if EMCC:
if MOZJS and 0:
print '\n[ checking native wasm support ]\n'
command = [EMCC, '-o', 'a.wasm.js', '-s', 'BINARYEN=1', os.path.join(options.binaryen_test, 'hello_world.c'), '-s', 'BINARYEN_METHOD="native-wasm"', '-s', 'BINARYEN_SCRIPTS="spidermonkify.py"']
print ' '.join(command)
subprocess.check_call(command)
cmd = [MOZJS, 'a.wasm.js']
out = run_command(cmd)
assert 'hello, world!' in out, out
proc = subprocess.Popen([NODEJS, 'a.wasm.js'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
out, err = proc.communicate()
assert proc.returncode != 0, 'should fail on no wasm support'
assert 'no native wasm support detected' in err, err
print '\n[ checking wasm.js methods... ]\n'
for method_init in ['interpret-asm2wasm', 'interpret-s-expr', 'asmjs', 'interpret-binary', 'asmjs,interpret-binary', 'interpret-binary,asmjs']:
# check success and failure for simple modes, only success for combined/fallback ones
for success in [1, 0] if ',' not in method_init else [1]:
method = method_init
command = [EMCC, '-o', 'a.wasm.js', '-s', 'BINARYEN=1', os.path.join(options.binaryen_test, 'hello_world.c') ]
command += ['-s', 'BINARYEN_METHOD="' + method + '"']
print method, ' : ', ' '.join(command), ' => ', success
subprocess.check_call(command)
see_polyfill = 'var WasmJS = ' in open('a.wasm.js').read()
if method and 'interpret' not in method:
assert not see_polyfill, 'verify polyfill was not added - we specified a method, and it does not need it'
else:
assert see_polyfill, 'we need the polyfill'
def break_cashew():
asm = open('a.wasm.asm.js').read()
asm = asm.replace('"almost asm"', '"use asm"; var not_in_asm = [].length + (true || { x: 5 }.x);')
asm = asm.replace("'almost asm'", '"use asm"; var not_in_asm = [].length + (true || { x: 5 }.x);')
with open('a.wasm.asm.js', 'w') as o: o.write(asm)
if method.startswith('interpret-asm2wasm'):
delete_from_orbit('a.wasm.wast') # we should not need the .wast
if not success:
break_cashew() # we need cashew
elif method.startswith('interpret-s-expr'):
os.unlink('a.wasm.asm.js') # we should not need the .asm.js
if not success:
os.unlink('a.wasm.wast')
elif method.startswith('asmjs'):
delete_from_orbit('a.wasm.wast') # we should not need the .wast
break_cashew() # we don't use cashew, so ok to break it
if not success:
os.unlink('a.wasm.js')
elif method.startswith('interpret-binary'):
delete_from_orbit('a.wasm.wast') # we should not need the .wast
os.unlink('a.wasm.asm.js') # we should not need the .asm.js
if not success:
os.unlink('a.wasm.wasm')
else:
1/0
if NODEJS:
proc = subprocess.Popen([NODEJS, 'a.wasm.js'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
out, err = proc.communicate()
if success:
assert proc.returncode == 0, err
assert 'hello, world!' in out, out
else:
assert proc.returncode != 0, err
assert 'hello, world!' not in out, out
print '\n[ checking wasm.js testcases... ]\n'
for c in tests:
if c.endswith(('.c', '.cpp')):
print '..', c
base = c.replace('.cpp', '').replace('.c', '')
post = base + '.post.js'
try:
post = open(os.path.join(options.binaryen_test, post)).read()
except:
post = None
expected = open(os.path.join(options.binaryen_test, base + '.txt')).read()
emcc = os.path.join(options.binaryen_test, base + '.emcc')
extra = []
if os.path.exists(emcc):
extra = json.loads(open(emcc).read())
if os.path.exists('a.normal.js'): os.unlink('a.normal.js')
for opts in [[], ['-O1'], ['-O2'], ['-O3'], ['-Oz']]:
for method in ['interpret-asm2wasm', 'interpret-s-expr', 'interpret-binary']:
command = [EMCC, '-o', 'a.wasm.js', '-s', 'BINARYEN=1', os.path.join(options.binaryen_test, c)] + opts + extra
command += ['-s', 'BINARYEN_METHOD="' + method + '"']
print '....' + ' '.join(command)
subprocess.check_call(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
if post:
open('a.wasm.js', 'a').write(post)
else:
print ' (no post)'
for which in ['wasm']:
print '......', which
try:
args = json.loads(open(os.path.join(options.binaryen_test, base + '.args')).read())
except:
args = []
print ' (no args)'
def execute():
if NODEJS:
cmd = [NODEJS, 'a.' + which + '.js'] + args
out = run_command(cmd)
if out.strip() != expected.strip():
fail(out, expected)
execute()
if method in ['interpret-s-expr']:
# binary and back
shutil.copyfile('a.wasm.wast', 'a.wasm.original.wast')
recreated = binary_format_check('a.wasm.wast', verify_final_result=False)
shutil.copyfile(recreated, 'a.wasm.wast')
execute()
if num_failures == 0:
print '\n[ success! ]'
if warnings:
print '\n' + '\n'.join(warnings)
if num_failures > 0:
print '\n[ ' + str(num_failures) + ' failures! ]'
sys.exit(num_failures)