def get_metadata_binaryen(infile, outfile, modify_wasm, args):
stdout = building.run_binaryen_command(
'wasm-emscripten-finalize',
infile=infile,
outfile=outfile if modify_wasm else None,
args=args,
stdout=subprocess.PIPE)
metadata = load_metadata_json(stdout)
return metadata
def get_metadata_python(infile, outfile, modify_wasm, args):
metadata = extract_metadata.extract_metadata(infile)
if modify_wasm:
# In some cases we still need to modify the wasm file
# using wasm-emscripten-finalize.
building.run_binaryen_command('wasm-emscripten-finalize',
infile=infile,
outfile=outfile,
args=args,
stdout=subprocess.PIPE)
# When we do this we can generate new imports, so
# re-read parts of the metadata post-finalize
extract_metadata.update_metadata(outfile, metadata)
elif 'main' in metadata['exports']:
# Mimic a bug in wasm-emscripten-finalize where we don't correctly
# detect the presense of the main wrapper function unless we are
# modifying the binary. This is because binaryen doesn't reaad
# the function bodies in this mode.
# TODO(sbc): Remove this once we make the switch away from
# binaryen metadata.
metadata['mainReadsParams'] = 1
return metadata
def finalize_wasm(infile, outfile, memfile, DEBUG):
building.save_intermediate(infile, 'base.wasm')
# tell binaryen to look at the features section, and if there isn't one, to use MVP
# (which matches what llvm+lld has given us)
args = ['--minimize-wasm-changes']
# if we don't need to modify the wasm, don't tell finalize to emit a wasm file
modify_wasm = False
if settings.WASM2JS:
# wasm2js requires full legalization (and will do extra wasm binary
# later processing later anyhow)
modify_wasm = True
if settings.GENERATE_SOURCE_MAP:
building.emit_wasm_source_map(infile, infile + '.map', outfile)
building.save_intermediate(infile + '.map', 'base_wasm.map')
args += [
'--output-source-map-url=' + settings.SOURCE_MAP_BASE +
os.path.basename(outfile) + '.map'
]
modify_wasm = True
if settings.DEBUG_LEVEL >= 2 or settings.ASYNCIFY_ADD or settings.ASYNCIFY_ADVISE or settings.ASYNCIFY_ONLY or settings.ASYNCIFY_REMOVE or settings.EMIT_SYMBOL_MAP or settings.EMIT_NAME_SECTION:
args.append('-g')
if settings.WASM_BIGINT:
args.append('--bigint')
if settings.DYNCALLS:
# we need to add all dyncalls to the wasm
modify_wasm = True
else:
if settings.WASM_BIGINT:
args.append('--no-dyncalls')
else:
args.append('--dyncalls-i64')
# we need to add some dyncalls to the wasm
modify_wasm = True
if settings.LEGALIZE_JS_FFI:
# When we dynamically link our JS loader adds functions from wasm modules to
# the table. It must add the original versions of them, not legalized ones,
# so that indirect calls have the right type, so export those.
if settings.RELOCATABLE:
args.append('--pass-arg=legalize-js-interface-export-originals')
modify_wasm = True
else:
args.append('--no-legalize-javascript-ffi')
if memfile:
args.append(f'--separate-data-segments={memfile}')
args.append(f'--global-base={settings.GLOBAL_BASE}')
modify_wasm = True
if settings.SIDE_MODULE:
args.append('--side-module')
if settings.STACK_OVERFLOW_CHECK >= 2:
args.append('--check-stack-overflow')
modify_wasm = True
if settings.STANDALONE_WASM:
args.append('--standalone-wasm')
if settings.DEBUG_LEVEL >= 3:
args.append('--dwarf')
stdout = building.run_binaryen_command(
'wasm-emscripten-finalize',
infile=infile,
outfile=outfile if modify_wasm else None,
args=args,
stdout=subprocess.PIPE)
if modify_wasm:
building.save_intermediate(infile, 'post_finalize.wasm')
elif infile != outfile:
shutil.copy(infile, outfile)
if settings.GENERATE_SOURCE_MAP:
building.save_intermediate(infile + '.map', 'post_finalize.map')
if memfile:
# we have a separate .mem file. binaryen did not strip any trailing zeros,
# because it's an ABI question as to whether it is valid to do so or not.
# we can do so here, since we make sure to zero out that memory (even in
# the dynamic linking case, our loader zeros it out)
remove_trailing_zeros(memfile)
return load_metadata_wasm(stdout, DEBUG)
def finalize_wasm(temp_files, infile, outfile, memfile, DEBUG):
basename = shared.unsuffixed(outfile.name)
wasm = basename + '.wasm'
base_wasm = infile
building.save_intermediate(infile, 'base.wasm')
args = ['--detect-features', '--minimize-wasm-changes']
write_source_map = shared.Settings.DEBUG_LEVEL >= 4
if write_source_map:
building.emit_wasm_source_map(base_wasm, base_wasm + '.map')
building.save_intermediate(base_wasm + '.map', 'base_wasm.map')
args += [
'--output-source-map-url=' + shared.Settings.SOURCE_MAP_BASE +
os.path.basename(shared.Settings.WASM_BINARY_FILE) + '.map'
]
# tell binaryen to look at the features section, and if there isn't one, to use MVP
# (which matches what llvm+lld has given us)
if shared.Settings.DEBUG_LEVEL >= 2 or shared.Settings.PROFILING_FUNCS or shared.Settings.EMIT_SYMBOL_MAP or shared.Settings.ASYNCIFY_ONLY or shared.Settings.ASYNCIFY_REMOVE or shared.Settings.ASYNCIFY_ADD:
args.append('-g')
if shared.Settings.WASM_BIGINT:
args.append('--bigint')
if not shared.Settings.USE_LEGACY_DYNCALLS:
if shared.Settings.WASM_BIGINT:
args.append('--no-dyncalls')
else:
args.append('--dyncalls-i64')
if shared.Settings.LEGALIZE_JS_FFI != 1:
args.append('--no-legalize-javascript-ffi')
if not shared.Settings.MEM_INIT_IN_WASM:
args.append('--separate-data-segments=' + memfile)
if shared.Settings.SIDE_MODULE:
args.append('--side-module')
else:
# --global-base is used by wasm-emscripten-finalize to calculate the size
# of the static data used. The argument we supply here needs to match the
# global based used by lld (see building.link_lld). For relocatable this is
# zero for the global base although at runtime __memory_base is used.
# For non-relocatable output we used shared.Settings.GLOBAL_BASE.
# TODO(sbc): Can we remove this argument infer this from the segment
# initializer?
if shared.Settings.RELOCATABLE:
args.append('--global-base=0')
else:
args.append('--global-base=%s' % shared.Settings.GLOBAL_BASE)
if shared.Settings.STACK_OVERFLOW_CHECK >= 2:
args.append('--check-stack-overflow')
if shared.Settings.STANDALONE_WASM:
args.append('--standalone-wasm')
# When we dynamically link our JS loader adds functions from wasm modules to
# the table. It must add the original versions of them, not legalized ones,
# so that indirect calls have the right type, so export those.
if shared.Settings.RELOCATABLE:
args.append('--pass-arg=legalize-js-interface-export-originals')
if shared.Settings.DEBUG_LEVEL >= 3:
args.append('--dwarf')
stdout = building.run_binaryen_command('wasm-emscripten-finalize',
infile=base_wasm,
outfile=wasm,
args=args,
stdout=subprocess.PIPE)
if write_source_map:
building.save_intermediate(wasm + '.map', 'post_finalize.map')
building.save_intermediate(wasm, 'post_finalize.wasm')
if not shared.Settings.MEM_INIT_IN_WASM:
# we have a separate .mem file. binaryen did not strip any trailing zeros,
# because it's an ABI question as to whether it is valid to do so or not.
# we can do so here, since we make sure to zero out that memory (even in
# the dynamic linking case, our loader zeros it out)
remove_trailing_zeros(memfile)
return load_metadata_wasm(stdout, DEBUG)
def finalize_wasm(infile, memfile, DEBUG):
building.save_intermediate(infile, 'base.wasm')
args = ['--mutable-sp', '--detect-features', '--minimize-wasm-changes']
# if we don't need to modify the wasm, don't tell finalize to emit a wasm file
modify_wasm = False
if shared.Settings.RELOCATABLE:
# In relocatable mode we transform the PIC ABI from what llvm outputs
# to emscripten's PIC ABI that uses `fp$` and `g$` accessor functions.
modify_wasm = True
if shared.Settings.WASM2JS:
# wasm2js requires full legalization (and will do extra wasm binary
# later processing later anyhow)
modify_wasm = True
if shared.Settings.GENERATE_SOURCE_MAP:
building.emit_wasm_source_map(infile, infile + '.map')
building.save_intermediate(infile + '.map', 'base_wasm.map')
args += [
'--output-source-map-url=' + shared.Settings.SOURCE_MAP_BASE +
os.path.basename(shared.Settings.WASM_BINARY_FILE) + '.map'
]
modify_wasm = True
# tell binaryen to look at the features section, and if there isn't one, to use MVP
# (which matches what llvm+lld has given us)
if shared.Settings.DEBUG_LEVEL >= 2 or shared.Settings.ASYNCIFY_ADD or shared.Settings.ASYNCIFY_ADVISE or shared.Settings.ASYNCIFY_ONLY or shared.Settings.ASYNCIFY_REMOVE or shared.Settings.EMIT_SYMBOL_MAP or shared.Settings.PROFILING_FUNCS:
args.append('-g')
if shared.Settings.WASM_BIGINT:
args.append('--bigint')
if shared.Settings.USE_LEGACY_DYNCALLS:
# we need to add all dyncalls to the wasm
modify_wasm = True
else:
if shared.Settings.WASM_BIGINT:
args.append('--no-dyncalls')
else:
args.append('--dyncalls-i64')
# we need to add some dyncalls to the wasm
modify_wasm = True
if shared.Settings.LEGALIZE_JS_FFI:
# When we dynamically link our JS loader adds functions from wasm modules to
# the table. It must add the original versions of them, not legalized ones,
# so that indirect calls have the right type, so export those.
if shared.Settings.RELOCATABLE:
args.append('--pass-arg=legalize-js-interface-export-originals')
modify_wasm = True
else:
args.append('--no-legalize-javascript-ffi')
if memfile:
args.append('--separate-data-segments=' + memfile)
modify_wasm = True
if shared.Settings.SIDE_MODULE:
args.append('--side-module')
else:
# --global-base is used by wasm-emscripten-finalize to calculate the size
# of the static data used. The argument we supply here needs to match the
# global based used by lld (see building.link_lld). For relocatable this is
# zero for the global base although at runtime __memory_base is used.
# For non-relocatable output we used shared.Settings.GLOBAL_BASE.
# TODO(sbc): Can we remove this argument infer this from the segment
# initializer?
if shared.Settings.RELOCATABLE:
args.append('--global-base=0')
else:
args.append('--global-base=%s' % shared.Settings.GLOBAL_BASE)
if shared.Settings.STACK_OVERFLOW_CHECK >= 2:
args.append('--check-stack-overflow')
modify_wasm = True
if shared.Settings.STANDALONE_WASM:
args.append('--standalone-wasm')
modify_wasm = True
if shared.Settings.DEBUG_LEVEL >= 3:
args.append('--dwarf')
stdout = building.run_binaryen_command(
'wasm-emscripten-finalize',
infile=infile,
outfile=infile if modify_wasm else None,
args=args,
stdout=subprocess.PIPE)
if modify_wasm:
building.save_intermediate(infile, 'post_finalize.wasm')
if shared.Settings.GENERATE_SOURCE_MAP:
building.save_intermediate(infile + '.map', 'post_finalize.map')
if memfile:
# we have a separate .mem file. binaryen did not strip any trailing zeros,
# because it's an ABI question as to whether it is valid to do so or not.
# we can do so here, since we make sure to zero out that memory (even in
# the dynamic linking case, our loader zeros it out)
remove_trailing_zeros(memfile)
return load_metadata_wasm(stdout, DEBUG)
