# Copyright 2013 the V8 project authors. All rights reserved.

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions are

# met:

#

# * Redistributions of source code must retain the above copyright

# notice, this list of conditions and the following disclaimer.

# * Redistributions in binary form must reproduce the above

# copyright notice, this list of conditions and the following

# disclaimer in the documentation and/or other materials provided

# with the distribution.

# * Neither the name of Google Inc. nor the names of its

# contributors may be used to endorse or promote products derived

# from this software without specific prior written permission.

#

# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# Compile time controlled V8 features.

{

'variables': {

'v8_target_arch%': '<(target_arch)',

'v8_current_cpu%': '<(target_arch)',

# Emulate GN variables

# https://chromium.googlesource.com/chromium/src/build/+/556c524beb09c332698debe1b47b065d5d029cd0/config/BUILDCONFIG.gn#269

'conditions': [

['OS == "win" or OS == "winuwp"', {

'is_win': 1,

}, {

'is_win': 0,

}],

['OS == "fuchsia"', {

'is_fuchsia': 1,

}, {

'is_fuchsia': 0,

}],

['OS=="android"', { # GYP reverts OS to linux so use `-D OS=android`

'is_android': 1,

}, {

'is_android': 0,

}],

# flattened (!is_win && !is_fuchsia) because of GYP evaluation order

['not (OS == "win" or OS == "winuwp") and not (OS == "fuchsia")', {

'is_posix': 1,

}, {

'is_posix': 0,

}],

['component and "library" in component', {

'is_component_build': 1,

}, {

'is_component_build': 0,

}],

['OS == "win" or OS == "mac"', {

# Sets -DENABLE_SYSTEM_INSTRUMENTATION. Enables OS-dependent event tracing

'v8_enable_system_instrumentation': 1,

}, {

'v8_enable_system_instrumentation': 0,

}],

['OS == "win"', {

'v8_enable_etw_stack_walking': 1,

}, {

'v8_enable_etw_stack_walking': 0,

}],

['OS=="linux" or OS=="openharmony"', {

# Sets -dV8_ENABLE_PRIVATE_MAPPING_FORK_OPTIMIZATION.

#

# This flag speeds up the performance of fork/execve on Linux systems for

# embedders which use it (like Node.js). It works by marking the pages that

# V8 allocates as MADV_DONTFORK. Without MADV_DONTFORK, the Linux kernel

# spends a long time manipulating page mappings on fork and exec which the

# child process doesn't generally need to access.

#

# See v8:7381 for more details.

'v8_enable_private_mapping_fork_optimization': 1,

}, {

'v8_enable_private_mapping_fork_optimization': 0,

}],

],

# Variables from BUILD.gn

# Set to 1 to enable DCHECKs in release builds.

'dcheck_always_on%': 0,

# Sets -DV8_ENABLE_FUTURE.

'v8_enable_future%': 0,

# Sets -DVERIFY_HEAP.

'v8_enable_verify_heap%': 0,

# Sets -DVERIFY_PREDICTABLE

'v8_enable_verify_predictable%': 0,

# Enable compiler warnings when using V8_DEPRECATED apis.

'v8_deprecation_warnings%': 0,

# Enable compiler warnings when using V8_DEPRECATE_SOON apis.

'v8_imminent_deprecation_warnings%': 0,

# Allows the embedder to add a custom suffix to the version string.

'v8_embedder_string%': '',

# Sets -dENABLE_DISASSEMBLER.

'v8_enable_disassembler%': 0,

# Sets the number of internal fields on promise objects.

'v8_promise_internal_field_count%': 0,

# Sets -dENABLE_GDB_JIT_INTERFACE.

'v8_enable_gdbjit%': 0,

# Sets -dENABLE_HUGEPAGE

'v8_enable_hugepage%': 0,

# Sets -dENABLE_VTUNE_JIT_INTERFACE.

'v8_enable_vtunejit%': 0,

# Currently set for node by common.gypi, avoiding default because of gyp file bug.

# Should be turned on only for debugging.

#'v8_enable_handle_zapping%': 0,

# Enable fast mksnapshot runs.

'v8_enable_fast_mksnapshot%': 0,

# Enable using multiple threads to build builtins in mksnapshot.

'v8_enable_concurrent_mksnapshot%': 1,

# Enable the registration of unwinding info for Windows/x64 and ARM64.

'v8_win64_unwinding_info%': 1,

# Enable code comments for builtins in the snapshot (impacts performance).

'v8_enable_snapshot_code_comments%': 0,

# Enable native counters from the snapshot (impacts performance, sets

# -dV8_SNAPSHOT_NATIVE_CODE_COUNTERS).

# This option will generate extra code in the snapshot to increment counters,

# as per the --native-code-counters flag.

'v8_enable_snapshot_native_code_counters%': 0,

# Use pre-generated static root pointer values from static-roots.h.

'v8_enable_static_roots%': 0,

# Enable code-generation-time checking of types in the CodeStubAssembler.

'v8_enable_verify_csa%': 0,

# Enable pointer compression (sets -dV8_COMPRESS_POINTERS).

'v8_enable_pointer_compression%': 0,

'v8_enable_pointer_compression_shared_cage%': 0,

'v8_enable_31bit_smis_on_64bit_arch%': 0,

# Sets -dV8_SHORT_BUILTIN_CALLS

'v8_enable_short_builtin_calls%': 0,

# Sets -dOBJECT_PRINT.

'v8_enable_object_print%': 0,

# Sets -dV8_TRACE_MAPS.

'v8_enable_trace_maps%': 0,

# Sets -dV8_ENABLE_CHECKS.

'v8_enable_v8_checks%': 0,

# Sets -dV8_TRACE_IGNITION.

'v8_enable_trace_ignition%': 0,

# Sets -dV8_TRACE_FEEDBACK_UPDATES.

'v8_enable_trace_feedback_updates%': 0,

# Sets -dV8_ATOMIC_OBJECT_FIELD_WRITES and turns all field write operations

# into relaxed atomic operations.

'v8_enable_atomic_object_field_writes%': 1,

# Has no effect in Node.js. Here for completeness with V8's config.

'v8_enable_concurrent_marking%': 1,

# Enables various testing features.

'v8_enable_test_features%': 0,

# With post mortem support enabled, metadata is embedded into libv8 that

# describes various parameters of the VM for use by debuggers. See

# tools/gen-postmortem-metadata.py for details.

'v8_postmortem_support%': 0,

# Use Siphash as added protection against hash flooding attacks.

'v8_use_siphash%': 0,

# Enable seeded array index hash.

'v8_enable_seeded_array_index_hash%': 1,

# Use Perfetto (https://perfetto.dev) as the default TracingController. Not

# currently implemented.

'v8_use_perfetto%': 0,

# Enable map packing & unpacking (sets -dV8_MAP_PACKING).

'v8_enable_map_packing%': 0,

# Controls the threshold for on-heap/off-heap Typed Arrays.

'v8_typed_array_max_size_in_heap%': 64,

# Enable lazy source positions by default.

'v8_enable_lazy_source_positions%': 1,

# Disable write barriers when GCs are non-incremental and

# heap has single generation.

'v8_disable_write_barriers%': 0,

# Redirect allocation in young generation so that there will be

# only one single generation.

'v8_enable_single_generation%': 0,

# Use token threaded dispatch for the regular expression interpreter.

# Use switch-based dispatch if this is false.

'v8_enable_regexp_interpreter_threaded_dispatch%': 1,

# Disable all snapshot compression.

'v8_enable_snapshot_compression%': 0,

# Enable control-flow integrity features, such as pointer authentication

# for ARM64.

'v8_control_flow_integrity%': 0,

# Enable the experimental V8 sandbox.

# Sets -DV8_ENABLE_SANDBOX.

'v8_enable_sandbox%': 0,

# Enable leaptiering

'v8_enable_leaptiering%': 1,

# Enable support for external code range relative to the pointer compression

# cage.

# Sets -DV8_EXTERNAL_CODE_SPACE.

'v8_enable_external_code_space%': 0,

# Experimental feature for collecting per-class zone memory stats.

# Requires use_rtti = true

'v8_enable_precise_zone_stats%': 0,

# Experimental feature that uses SwissNameDictionary instead of NameDictionary

# as the backing store for all dictionary mode objects.

'v8_enable_swiss_name_dictionary%': 0,

# Experimental feature for tracking constness of properties in non-global

# dictionaries. Enabling this also always keeps prototypes in dict mode,

# meaning that they are not switched to fast mode.

# Sets -DV8_DICT_PROPERTY_CONST_TRACKING

'v8_dict_property_const_tracking%': 0,

# Allow for JS promise hooks (instead of just C++).

'v8_enable_javascript_promise_hooks%': 0,

# Allow for JS promise hooks (instead of just C++).

'v8_enable_continuation_preserved_embedder_data%': 1,

# Enable allocation folding globally (sets -dV8_ALLOCATION_FOLDING).

# When it's disabled, the --turbo-allocation-folding runtime flag will be ignored.

'v8_enable_allocation_folding%': 1,

# Enable runtime verification of heap snapshots produced for devtools.

'v8_enable_heap_snapshot_verify%': 0,

# Enable global allocation site tracking.

'v8_allocation_site_tracking%': 1,

'v8_scriptormodule_legacy_lifetime%': 0,

# Change code emission and runtime features to be CET shadow-stack compliant

# (incomplete and experimental).

'v8_enable_cet_shadow_stack%': 0,

# Compile V8 using zlib as dependency.

# Sets -DV8_USE_ZLIB

'v8_use_zlib%': 1,

# Enable Sparkplug

# Sets -DV8_ENABLE_SPARKPLUG.

'v8_enable_sparkplug%': 1,

# Whether custom embedder snapshots may extend (= allocate new objects in)

# ReadOnlySpace.

'v8_enable_extensible_ro_snapshot%': 1,

# Variables from v8.gni

# Enable ECMAScript Internationalization API. Enabling this feature will

# add a dependency on the ICU library.

'v8_enable_i18n_support%': 1,

# Enable Temporal API. Enabling this feature will

# add a dependency on the temporal_rs library.

'v8_enable_temporal_support%': 0,

# Lite mode disables a number of performance optimizations to reduce memory

# at the cost of performance.

# Sets --DV8_LITE_MODE.

'v8_enable_lite_mode%': 0,

# Enable the Turbofan compiler.

# Sets -dV8_ENABLE_TURBOFAN

'v8_enable_turbofan%': 1,

# Enable the Maglev compiler.

# Sets -dV8_ENABLE_MAGLEV

'v8_enable_maglev%': 0,

# Include support for WebAssembly. If disabled, the 'WebAssembly' global

# will not be available, and embedder APIs to generate WebAssembly modules

# will fail. Also, asm.js will not be translated to WebAssembly and will be

# executed as standard JavaScript instead.

# Sets -dV8_ENABLE_WEBASSEMBLY.

'v8_enable_webassembly%': 1,

# Enable advanced BigInt algorithms, costing about 10-30 KiB binary size

# depending on platform.

'v8_advanced_bigint_algorithms%': 1,

# Enable 256-bit long vector re-vectorization pass in WASM compilation pipeline.

'v8_enable_wasm_simd256_revec%' : 0

},

'target_defaults': {

'conditions': [

['v8_embedder_string!=""', {

'defines': ['V8_EMBEDDER_STRING="<(v8_embedder_string)"',],

}],

['v8_enable_disassembler==1', {

'defines': ['ENABLE_DISASSEMBLER',],

}],

['v8_promise_internal_field_count!=0', {

'defines': ['V8_PROMISE_INTERNAL_FIELD_COUNT=<(v8_promise_internal_field_count)'],

}],

['v8_enable_future==1', {

'defines': ['V8_ENABLE_FUTURE',],

}],

['v8_enable_lite_mode==1', {

'defines': ['V8_LITE_MODE',],

}],

['v8_enable_gdbjit==1', {

'defines': ['ENABLE_GDB_JIT_INTERFACE',],

}],

['v8_enable_hugepage==1', {

'defines': ['ENABLE_HUGEPAGE',],

}],

['v8_enable_private_mapping_fork_optimization==1', {

'defines': ['V8_ENABLE_PRIVATE_MAPPING_FORK_OPTIMIZATION'],

}],

['v8_enable_vtunejit==1', {

'defines': ['ENABLE_VTUNE_JIT_INTERFACE',],

}],

['v8_enable_pointer_compression==1', {

'defines': ['V8_COMPRESS_POINTERS'],

}],

['v8_enable_pointer_compression==1 and v8_enable_pointer_compression_shared_cage!=1', {

'defines': ['V8_COMPRESS_POINTERS_IN_MULTIPLE_CAGES'],

}],

['v8_enable_pointer_compression_shared_cage==1', {

'defines': ['V8_COMPRESS_POINTERS_IN_SHARED_CAGE'],

}],

['v8_enable_pointer_compression==1 or v8_enable_31bit_smis_on_64bit_arch==1', {

'defines': ['V8_31BIT_SMIS_ON_64BIT_ARCH',],

}],

['v8_enable_short_builtin_calls==1', {

'defines': ['V8_SHORT_BUILTIN_CALLS',],

}],

['v8_enable_sandbox==1', {

'defines': ['V8_ENABLE_SANDBOX',],

}],

['v8_enable_external_code_space==1', {

'defines': ['V8_EXTERNAL_CODE_SPACE',],

}],

['v8_enable_object_print==1', {

'defines': ['OBJECT_PRINT',],

}],

['v8_enable_verify_heap==1', {

'defines': ['VERIFY_HEAP',],

}],

['v8_enable_verify_predictable==1', {

'defines': ['VERIFY_PREDICTABLE',],

}],

['v8_enable_trace_maps==1', {

'defines': ['V8_TRACE_MAPS',],

}],

['v8_enable_trace_ignition==1', {

'defines': ['V8_TRACE_IGNITION',],

}],

['v8_enable_trace_feedback_updates==1', {

'defines': ['V8_TRACE_FEEDBACK_UPDATES',],

}],

['v8_enable_test_features==1', {

'defines': [

'V8_ENABLE_ALLOCATION_TIMEOUT',

'V8_ENABLE_FORCE_SLOW_PATH',

'V8_ENABLE_DOUBLE_CONST_STORE_CHECK',

],

}],

['v8_enable_v8_checks==1', {

'defines': ['V8_ENABLE_CHECKS',],

}],

['v8_deprecation_warnings==1', {

'defines': ['V8_DEPRECATION_WARNINGS',],

}],

['v8_imminent_deprecation_warnings==1', {

'defines': ['V8_IMMINENT_DEPRECATION_WARNINGS',],

}],

['v8_enable_i18n_support==1', {

'defines': ['V8_INTL_SUPPORT',],

}],

['v8_enable_temporal_support==1', {

'defines': ['V8_TEMPORAL_SUPPORT',],

}],

# Refs: https://github.com/nodejs/node/pull/23801

# ['v8_enable_handle_zapping==1', {

# 'defines': ['ENABLE_HANDLE_ZAPPING',],

# }],

['v8_enable_heap_snapshot_verify==1', {

'defines': ['V8_ENABLE_HEAP_SNAPSHOT_VERIFY',],

}],

['v8_enable_snapshot_native_code_counters==1', {

'defines': ['V8_SNAPSHOT_NATIVE_CODE_COUNTERS',],

}],

['v8_enable_single_generation==1', {

'defines': ['V8_ENABLE_SINGLE_GENERATION',],

}],

['v8_disable_write_barriers==1', {

'defines': ['V8_DISABLE_WRITE_BARRIERS',],

}, {

'configurations': {

'Debug': {

'defines': ['V8_VERIFY_WRITE_BARRIERS'],

},

},

}],

['v8_enable_atomic_object_field_writes==1', {

'defines': ['V8_ATOMIC_OBJECT_FIELD_WRITES',],

}],

['v8_enable_lazy_source_positions==1', {

'defines': ['V8_ENABLE_LAZY_SOURCE_POSITIONS',],

}],

['v8_use_siphash==1', {

'defines': ['V8_USE_SIPHASH',],

}],

['v8_enable_seeded_array_index_hash==1', {

'defines': ['V8_ENABLE_SEEDED_ARRAY_INDEX_HASH',],

}],

['dcheck_always_on!=0', {

'defines': ['DEBUG',],

}, {

'defines': ['NDEBUG',],

}],

['v8_enable_verify_csa==1', {

'defines': ['ENABLE_VERIFY_CSA',],

}],

['v8_use_perfetto==1', {

'defines': ['V8_USE_PERFETTO',],

}],

['v8_enable_map_packing==1', {

'defines': ['V8_MAP_PACKING',],

}],

['v8_win64_unwinding_info==1', {

'defines': ['V8_WIN64_UNWINDING_INFO',],

}],

['tsan==1', {

'defines': ['V8_IS_TSAN',],

}],

['v8_enable_regexp_interpreter_threaded_dispatch==1', {

'defines': ['V8_ENABLE_REGEXP_INTERPRETER_THREADED_DISPATCH',],

}],

['v8_enable_snapshot_compression==1', {

'defines': ['V8_SNAPSHOT_COMPRESSION',],

}],

['v8_control_flow_integrity==1', {

'defines': ['V8_ENABLE_CONTROL_FLOW_INTEGRITY',],

}],

['v8_enable_cet_shadow_stack==1', {

'defines': ['V8_ENABLE_CET_SHADOW_STACK',],

}],

['v8_enable_static_roots==1', {

'defines': ['V8_STATIC_ROOTS',],

}],

['v8_use_zlib==1', {

'defines': ['V8_USE_ZLIB',],

}],

['v8_enable_extensible_ro_snapshot==1', {

'defines': ['V8_ENABLE_EXTENSIBLE_RO_SNAPSHOT',],

}],

['v8_enable_leaptiering==1', {

'defines': ['V8_ENABLE_LEAPTIERING',],

}],

['v8_enable_precise_zone_stats==1', {

'defines': ['V8_ENABLE_PRECISE_ZONE_STATS',],

}],

['v8_enable_sparkplug==1', {

'defines': ['V8_ENABLE_SPARKPLUG',],

}],

['v8_enable_maglev==1', {

'defines': ['V8_ENABLE_MAGLEV',],

}],

['v8_enable_turbofan==1', {

'defines': ['V8_ENABLE_TURBOFAN',],

}],

['v8_enable_swiss_name_dictionary==1', {

'defines': ['V8_ENABLE_SWISS_NAME_DICTIONARY',],

}],

['v8_enable_system_instrumentation==1', {

'defines': ['V8_ENABLE_SYSTEM_INSTRUMENTATION',],

}],

['v8_enable_etw_stack_walking==1', {

'defines': ['V8_ENABLE_ETW_STACK_WALKING',],

}],

['v8_enable_webassembly==1', {

'defines': ['V8_ENABLE_WEBASSEMBLY',],

}],

['v8_dict_property_const_tracking==1', {

'defines': ['V8_DICT_PROPERTY_CONST_TRACKING',],

}],

['v8_enable_javascript_promise_hooks==1', {

'defines': ['V8_ENABLE_JAVASCRIPT_PROMISE_HOOKS',],

}],

['v8_enable_continuation_preserved_embedder_data==1', {

'defines': ['V8_ENABLE_CONTINUATION_PRESERVED_EMBEDDER_DATA',],

}],

['v8_enable_allocation_folding==1', {

'defines': ['V8_ALLOCATION_FOLDING',],

}],

['v8_allocation_site_tracking==1', {

'defines': ['V8_ALLOCATION_SITE_TRACKING',],

}],

['v8_scriptormodule_legacy_lifetime==1', {

'defines': ['V8_SCRIPTORMODULE_LEGACY_LIFETIME',],

}],

['v8_advanced_bigint_algorithms==1', {

'defines': ['V8_ADVANCED_BIGINT_ALGORITHMS',],

}],

['v8_enable_wasm_simd256_revec==1', {

'defines': ['V8_ENABLE_WASM_SIMD256_REVEC',],

}],

], # conditions

'defines': [

'V8_GYP_BUILD',

'V8_TYPED_ARRAY_MAX_SIZE_IN_HEAP=<(v8_typed_array_max_size_in_heap)',

], # defines

}, # target_defaults

}