# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
# vim: set filetype=python:
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

# /!\ Use js_option() instead of option() in this file. /!\
# =========================================================

@depends(build_project, '--help')
def building_js(build_project, help):
    return build_project == 'js'

# Exception to the rule above: JS_STANDALONE is a special option that doesn't
# want the js_option treatment. When we're done merging js/src/configure and
# top-level configure, it can go away, although the JS_STANDALONE config
# will still need to be set depending on building_js above.
option(env='JS_STANDALONE', default=building_js,
       help='Reserved for internal use')

@depends('JS_STANDALONE')
def js_standalone(value):
    if value:
        return True
set_config('JS_STANDALONE', js_standalone)
set_define('JS_STANDALONE', js_standalone)
add_old_configure_assignment('JS_STANDALONE', js_standalone)
js_option('--disable-js-shell', default=building_js,
          help='Do not build the JS shell')

@depends('--disable-js-shell')
def js_disable_shell(value):
    if not value:
        return True

set_config('JS_DISABLE_SHELL', js_disable_shell)

set_define('JS_64BIT', depends(target)(lambda t: t.bitness == 64 or None))

set_define('JS_PUNBOX64', depends(target)(lambda t: t.bitness == 64 or None))
set_define('JS_NUNBOX32', depends(target)(lambda t: t.bitness == 32 or None))


# SpiderMonkey as a shared library, and how its symbols are exported
# ==================================================================
js_option('--disable-shared-js', default=building_js,
          help='Do not create a shared library')

js_option('--disable-export-js', default=building_js,
          help='Do not mark JS symbols as DLL exported/visible')

@depends('--disable-shared-js', '--disable-export-js')
def shared_js(shared_js, export_js):
    if shared_js:
        if not export_js:
            die('Must export JS symbols when building a shared library.')
        return True

set_config('JS_SHARED_LIBRARY', shared_js)
add_old_configure_assignment('JS_SHARED_LIBRARY', shared_js)

@depends('--disable-shared-js', '--disable-export-js')
def exportable_js_api(shared_js, export_js):
    if not shared_js and export_js:
        return True

set_define('STATIC_EXPORTABLE_JS_API', exportable_js_api)

@depends('--disable-shared-js', '--disable-export-js')
def static_js_api(shared_js, export_js):
    if not shared_js and not export_js:
        return True

set_define('STATIC_JS_API', static_js_api)

@depends('--disable-shared-js')
def static_js(value):
    if not value:
        return True

set_define('MOZ_STATIC_JS', static_js)

@deprecated_option(env='DISABLE_SHARED_JS', nargs='?')
def disable_shared_js(value):
    # DISABLE_SHARED_JS=1 gets us an empty PositiveOptionValue
    if value and not len(value):
        suggestion = '--disable-shared-js'
    else:
        suggestion = '--enable-shared-js'

    die('Setting %s is deprecated, use %s instead.',
        value.format('DISABLE_SHARED_JS'), suggestion)

@deprecated_option(env='DISABLE_EXPORT_JS', nargs='?')
def disable_export_js(value):
    # DISABLE_EXPORT_JS=1 gets us an empty PositiveOptionValue
    if value and not len(value):
        suggestion = '--disable-export-js'
    else:
        suggestion = '--enable-export-js'

    die('Setting %s is deprecated, use %s instead.',
        value.format('DISABLE_EXPORT_JS'), suggestion)


# JIT support
# =======================================================
@depends(target)
def ion_default(target):
    if target.cpu in ('x86', 'x86_64', 'arm', 'aarch64', 'mips32', 'mips64'):
        return True

js_option('--enable-ion',
          default=ion_default,
          help='Enable use of the IonMonkey JIT')

set_config('ENABLE_ION', depends_if('--enable-ion')(lambda x: True))

# JIT code simulator for cross compiles
# =======================================================
js_option('--enable-simulator', choices=('arm', 'arm64', 'mips32', 'mips64'),
          nargs=1,
          help='Enable a JIT code simulator for the specified architecture')

@depends('--enable-ion', '--enable-simulator', target)
def simulator(ion_enabled, simulator_enabled, target):
    if not ion_enabled or not simulator_enabled:
        return

    sim_cpu = simulator_enabled[0]

    if sim_cpu in ('arm', 'mips32'):
        if target.cpu != 'x86':
            die('The %s simulator only works on x86.' % sim_cpu)

    if sim_cpu in ('arm64', 'mips64'):
        if target.cpu != 'x86_64':
            die('The %s simulator only works on x86-64.' % sim_cpu)

    return namespace(**{sim_cpu: True})

set_config('JS_SIMULATOR', depends_if(simulator)(lambda x: True))
set_config('JS_SIMULATOR_ARM', simulator.arm)
set_config('JS_SIMULATOR_ARM64', simulator.arm64)
set_config('JS_SIMULATOR_MIPS32', simulator.mips32)
set_config('JS_SIMULATOR_MIPS64', simulator.mips64)
set_define('JS_SIMULATOR', depends_if(simulator)(lambda x: True))
set_define('JS_SIMULATOR_ARM', simulator.arm)
set_define('JS_SIMULATOR_ARM64', simulator.arm64)
set_define('JS_SIMULATOR_MIPS32', simulator.mips32)
set_define('JS_SIMULATOR_MIPS64', simulator.mips64)

@depends('--enable-ion', simulator, target)
def jit_codegen(ion_enabled, simulator, target):
    if not ion_enabled:
        return namespace(none=True)

    if simulator:
        return simulator

    if target.cpu == 'aarch64':
        return namespace(arm64=True)
    elif target.cpu == 'x86_64':
        return namespace(x64=True)

    return namespace(**{str(target.cpu): True})

set_config('JS_CODEGEN_NONE', jit_codegen.none)
set_config('JS_CODEGEN_ARM', jit_codegen.arm)
set_config('JS_CODEGEN_ARM64', jit_codegen.arm64)
set_config('JS_CODEGEN_MIPS32', jit_codegen.mips32)
set_config('JS_CODEGEN_MIPS64', jit_codegen.mips64)
set_config('JS_CODEGEN_X86', jit_codegen.x86)
set_config('JS_CODEGEN_X64', jit_codegen.x64)
set_define('JS_CODEGEN_NONE', jit_codegen.none)
set_define('JS_CODEGEN_ARM', jit_codegen.arm)
set_define('JS_CODEGEN_ARM64', jit_codegen.arm64)
set_define('JS_CODEGEN_MIPS32', jit_codegen.mips32)
set_define('JS_CODEGEN_MIPS64', jit_codegen.mips64)
set_define('JS_CODEGEN_X86', jit_codegen.x86)
set_define('JS_CODEGEN_X64', jit_codegen.x64)

@depends('--enable-ion', simulator, target, moz_debug)
def jit_disasm_arm(ion_enabled, simulator, target, debug):
    if not ion_enabled:
        return

    if simulator and debug:
        if getattr(simulator, 'arm', None):
            return True

    if target.cpu == 'arm' and debug:
        return True

set_config('JS_DISASM_ARM', jit_disasm_arm)
set_define('JS_DISASM_ARM', jit_disasm_arm)

@depends('--enable-ion', simulator, target, moz_debug)
def jit_disasm_arm64(ion_enabled, simulator, target, debug):
    if not ion_enabled:
        return

    if simulator and debug:
        if getattr(simulator, 'arm64', None):
            return True

    if target.cpu == 'aarch64' and debug:
        return True

set_config('JS_DISASM_ARM64', jit_disasm_arm64)
set_define('JS_DISASM_ARM64', jit_disasm_arm64)

# Profiling
# =======================================================
js_option('--enable-instruments', env='MOZ_INSTRUMENTS',
          help='Enable instruments remote profiling')

@depends('--enable-instruments', target)
def instruments(value, target):
    if value and target.os != 'OSX':
        die('--enable-instruments cannot be used when targeting %s',
            target.os)
    if value:
        return True

set_config('MOZ_INSTRUMENTS', instruments)
set_define('MOZ_INSTRUMENTS', instruments)
add_old_configure_assignment('MOZ_INSTRUMENTS', instruments)
imply_option('--enable-profiling', instruments, reason='--enable-instruments')

js_option('--enable-callgrind', env='MOZ_CALLGRIND',
          help='Enable callgrind profiling')

@depends('--enable-callgrind')
def callgrind(value):
    if value:
        return True

set_define('MOZ_CALLGRIND', callgrind)
imply_option('--enable-profiling', callgrind)

@depends(milestone, '--help')
def enable_profiling(milestone, help):
    return milestone.is_nightly

js_option('--enable-profiling', env='MOZ_PROFILING', default=enable_profiling,
          help='Set compile flags necessary for using sampling profilers '
               '(e.g. shark, perf)')

@depends('--enable-profiling')
def profiling(value):
    if value:
        return True

add_old_configure_assignment('MOZ_PROFILING', profiling)

@depends(profiling, target)
def imply_vtune(value, target):
    ok_cpu    = target.cpu in ['x86', 'x86_64']
    ok_kernel = target.kernel == 'WINNT' or \
                (target.kernel == 'Linux' and target.os == 'GNU')

    if value and ok_cpu and ok_kernel:
        return True

set_config('MOZ_PROFILING', profiling)
set_define('MOZ_PROFILING', profiling)
imply_option('--enable-vtune', imply_vtune, reason='--enable-profiling')


js_option('--enable-vtune', env='MOZ_VTUNE', help='Enable VTune profiling')

@depends('--enable-vtune')
def vtune(value):
    if value:
        return True

set_config('MOZ_VTUNE', vtune)
set_define('MOZ_VTUNE', vtune)


js_option('--enable-gc-trace', env='JS_GC_TRACE',
          help='Enable tracing of allocation and finalization')

@depends('--enable-gc-trace')
def gc_trace(value):
    if value:
        return True

set_define('JS_GC_TRACE', gc_trace)


js_option('--enable-gczeal',
          default=depends(when=moz_debug)(lambda: True),
          help='Enable zealous GCing')

set_define('JS_GC_ZEAL',
           depends_if('--enable-gczeal')(lambda _: True))


# Use a smaller chunk size for GC chunks
# ========================================================
# Use large (1MB) chunks by default.  This option can be used to give
# smaller (currently 256K) chunks.
js_option('--enable-small-chunk-size',
          help='Allocate memory for JS GC things in smaller chunks')

set_define('JS_GC_SMALL_CHUNK_SIZE',
           depends(when='--enable-small-chunk-size')(lambda: True))


# Trace logging.
# =======================================================
js_option('--enable-trace-logging',
          default=depends(when=moz_debug)(lambda: True),
          help='Enable trace logging')

set_config('ENABLE_TRACE_LOGGING',
           depends_if('--enable-trace-logging')(lambda x: True))
set_define('JS_TRACE_LOGGING',
           depends_if('--enable-trace-logging')(lambda x: True))


# Enable breakpoint for artificial OOMs
# =======================================================
js_option('--enable-oom-breakpoint',
          help='Enable a breakpoint function for artificial OOMs')

set_define('JS_OOM_BREAKPOINT',
           depends_if('--enable-oom-breakpoint')(lambda _: True))


js_option('--enable-perf', env='JS_ION_PERF',
          help='Enable Linux perf integration')

@depends('--enable-perf')
def ion_perf(value):
    if value:
        return True

set_define('JS_ION_PERF', ion_perf)


js_option('--enable-jitspew',
          default=depends(when=moz_debug)(lambda: True),
          help='Enable the Jit spew and IONFLAGS environment variable.')

set_define('JS_JITSPEW',
           depends_if('--enable-jitspew')(lambda _: True))
set_config('JS_JITSPEW',
           depends_if('--enable-jitspew')(lambda _: True))


js_option('--enable-more-deterministic', env='JS_MORE_DETERMINISTIC',
          help='Enable changes that make the shell more deterministic')

@depends('--enable-more-deterministic')
def more_deterministic(value):
    if value:
        return True

set_define('JS_MORE_DETERMINISTIC', more_deterministic)


# CTypes
# =======================================================
@depends(building_js, '--help')
def ctypes_default(building_js, _):
    return not building_js

js_option('--enable-ctypes', help='Enable js-ctypes',
          default=ctypes_default)

build_ctypes = depends_if('--enable-ctypes')(lambda _: True)

set_config('BUILD_CTYPES', build_ctypes)
set_define('BUILD_CTYPES', build_ctypes)
add_old_configure_assignment('BUILD_CTYPES', build_ctypes)

@depends(build_ctypes, building_js)
def js_has_ctypes(ctypes, js):
    if ctypes and js:
        return True

set_config('JS_HAS_CTYPES', js_has_ctypes)
set_define('JS_HAS_CTYPES', js_has_ctypes)
add_old_configure_assignment('JS_HAS_CTYPES', js_has_ctypes)

@depends('--enable-ctypes', '--enable-compile-environment', '--help')
def ctypes_and_compile_environment(ctypes, compile_environment, _):
    return ctypes and compile_environment

include('ffi.configure', when=ctypes_and_compile_environment)


# Support various fuzzing options
# ==============================================================
with only_when('--enable-compile-environment'):
    js_option('--enable-fuzzing', help='Enable fuzzing support')

    @depends('--enable-fuzzing')
    def enable_fuzzing(value):
        if value:
            return True

    @depends(try_compile(body='__AFL_COMPILER;',
                         check_msg='for AFL compiler',
                         when='--enable-fuzzing'))
    def enable_aflfuzzer(afl):
        if afl:
            return True

    @depends(enable_fuzzing,
             enable_aflfuzzer,
             c_compiler)
    def enable_libfuzzer(fuzzing, afl, c_compiler):
        if fuzzing and not afl and c_compiler.type == 'clang':
            return True

    @depends(enable_fuzzing,
             enable_aflfuzzer,
             enable_libfuzzer)
    def enable_fuzzing_interfaces(fuzzing, afl, libfuzzer):
        if fuzzing and (afl or libfuzzer):
            return True

    set_config('FUZZING', enable_fuzzing)
    set_define('FUZZING', enable_fuzzing)

    set_config('LIBFUZZER', enable_libfuzzer)
    set_define('LIBFUZZER', enable_libfuzzer)

    set_config('FUZZING_INTERFACES', enable_fuzzing_interfaces)
    set_define('FUZZING_INTERFACES', enable_fuzzing_interfaces)

# Enable pipeline operator
# ===================================================
js_option('--enable-pipeline-operator', default=False, help='Enable pipeline operator')

@depends('--enable-pipeline-operator')
def enable_pipeline_operator(value):
    if value:
        return True

set_config('ENABLE_PIPELINE_OPERATOR', enable_pipeline_operator)
set_define('ENABLE_PIPELINE_OPERATOR', enable_pipeline_operator)



# Experimental support for BinAST
# ==============================================================

@depends(target, milestone)
def enable_build_binast(target, milestone):
    # For reasons unknown at this time, BinAST causes timeouts on win32
    # and failures on Android.
    if milestone.is_nightly and not (target.kernel == 'WINNT' and target.cpu == 'x86') and not (target.os == 'Android'):
        return True

set_define('JS_BUILD_BINAST', enable_build_binast)
set_config('JS_BUILD_BINAST', enable_build_binast)