Function configure_v8

configure.py:2143–2233

(o, configs)

def configure_v8(o, configs):
  set_configuration_variable(configs, 'v8_enable_v8_checks', release=0, debug=1)

  o['variables']['v8_enable_webassembly'] = 0 if options.v8_lite_mode else 1
  o['variables']['v8_enable_javascript_promise_hooks'] = 1
  o['variables']['v8_enable_lite_mode'] = 1 if options.v8_lite_mode else 0
  is_gdbjit_supported_arch = (
      'x64' in o['variables']['target_arch'] or
      'ia32' in o['variables']['target_arch'] or
      'ppc64' in o['variables']['target_arch']
  )
  is_linux = flavor == 'linux'
  if (options.gdb is not None):
    o['variables']['v8_enable_gdbjit'] = 1 if options.gdb else 0
  else:
    o['variables']['v8_enable_gdbjit'] = 1 if is_gdbjit_supported_arch and is_linux else 0
  o['variables']['v8_optimized_debug'] = 0 if options.v8_non_optimized_debug else 1
  o['variables']['dcheck_always_on'] = 1 if options.v8_with_dchecks else 0
  o['variables']['v8_enable_object_print'] = 0 if options.v8_disable_object_print else 1
  o['variables']['v8_random_seed'] = 0  # Use a random seed for hash tables.
  o['variables']['v8_promise_internal_field_count'] = 1 # Add internal field to promises for async hooks.
  o['variables']['v8_use_siphash'] = 0 if options.without_siphash else 1
  o['variables']['v8_enable_maglev'] = B(not options.v8_disable_maglev and
                                         flavor not in ('aix', 'os400', 'zos') and
                                         o['variables']['target_arch'] in maglev_enabled_architectures)
  o['variables']['v8_enable_pointer_compression'] = 1 if options.enable_pointer_compression else 0
  # Using the sandbox requires always allocating array buffer backing stores in the sandbox.
  # We currently have many backing stores tied to pointers from C++ land that are not
  # even necessarily dynamic (e.g. in static storage) for fast communication between JS and C++.
  # Until we manage to get rid of all those, v8_enable_sandbox cannot be used.
  # Note that enabling pointer compression without enabling sandbox is unsupported by V8,
  # so this can be broken at any time.
  o['variables']['v8_enable_sandbox'] = 0
  # We set v8_enable_pointer_compression_shared_cage to 0 always, even when
  # pointer compression is enabled so that we don't accidentally enable shared
  # cage mode when pointer compression is on.
  o['variables']['v8_enable_pointer_compression_shared_cage'] = 1 if options.pointer_compression_shared_cage else 0
  o['variables']['v8_enable_external_code_space'] = 1 if options.enable_pointer_compression else 0
  o['variables']['v8_enable_31bit_smis_on_64bit_arch'] = 1 if options.enable_pointer_compression else 0
  o['variables']['v8_enable_extensible_ro_snapshot'] = 0
  # TODO(richardlau): Temporal objects in V8 currently reference a private
  # ICU header file and fail to compile with shared ICU or no ICU. For now,
  # if auto-detecting, warn and disable Temporal in those cases.
  # Refs: https://github.com/nodejs/node/issues/62676
  if (not options.v8_disable_temporal_support and not options.v8_enable_temporal_support):
    match options.with_intl:
      case 'none':
        warn('Temporal support disabled when compiling without ICU')
        options.v8_disable_temporal_support = True
      case 'system-icu':
        warn('Temporal support disabled when compiling with a shared ICU library')
        options.v8_disable_temporal_support = True
  o['variables']['v8_enable_temporal_support'] = 0 if options.v8_disable_temporal_support else 1
  o['variables']['v8_trace_maps'] = 1 if options.trace_maps else 0
  o['variables']['node_use_v8_platform'] = b(not options.without_v8_platform)
  o['variables']['node_use_bundled_v8'] = b(not options.without_bundled_v8)
  o['variables']['force_dynamic_crt'] = 1 if options.shared else 0
  o['variables']['node_enable_d8'] = b(options.enable_d8)