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v8/bazel/defs.bzl
Jakob Linke 539b50f5ae [turbofan] Add the v8_enable_turbofan build option 
When disabled, Turbofan is fully excluded from the compilation result.
This is expected to reduce V8's contribution to chromium's binary size
by roughly 20%.

If Turbofan is disabled, Maglev and Webassembly must also be disabled
(since both depend on TF).

Note this new configuration (v8_enable_turbofan=false) is not yet
used anywhere - we'll probably enable it for lite_mode bots in an
upcoming CL for test coverage.

Changes in detail:
- Split out all src/compiler files from the main source sets. This
  was mostly done already, here we only clean up the few files that
  were left.
- Define a new main TF entry point in turbofan.h. `NewCompilationJob`
  replaces `Pipeline::NewCompilationJob`.
- When TF is enabled, turbofan-enabled.cc implements the above.
- When disabled, turbofan-disabled stubs out the above with a runtime
  FATAL message.
- The build process is modified s.t. mksnapshot always has TF
  available since it's needed to generate builtins. When disabled,
  TF is removed from other components, in particular it is no longer
  included in v8_compiler and transitively in v8_base.
- When disabled, v8_for_testing no longer has v8_initializers
  available. These were only needed for test-serialize.cc, which
  is now excluded from this build mode.
- When disabled, remove all related cctest/ und unittest/ files from
  the build.

Bug: v8:13629
Change-Id: I63ab7632f03d0ee4a787cfc01574b5fdb08fd80b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/4128529
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Auto-Submit: Jakob Linke <jgruber@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Commit-Queue: Jakob Linke <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/main@{#85210}
2023-01-11 10:57:54 +00:00

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# Copyright 2021 the V8 project authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
FlagInfo = provider(fields = ["value"])
def _options_impl(ctx):
return FlagInfo(value = ctx.build_setting_value)
_create_option_flag = rule(
implementation = _options_impl,
build_setting = config.bool(flag = True),
)
_create_option_string = rule(
implementation = _options_impl,
build_setting = config.string(flag = True),
)
_create_option_int = rule(
implementation = _options_impl,
build_setting = config.int(flag = True),
)
def v8_flag(name, default = False):
_create_option_flag(name = name, build_setting_default = default)
native.config_setting(name = "is_" + name, flag_values = {name: "True"})
native.config_setting(name = "is_not_" + name, flag_values = {name: "False"})
def v8_string(name, default = ""):
_create_option_string(name = name, build_setting_default = default)
def v8_int(name, default = 0):
_create_option_int(name = name, build_setting_default = default)
def _custom_config_impl(ctx):
defs = []
defs.append("V8_TYPED_ARRAY_MAX_SIZE_IN_HEAP=" +
str(ctx.attr._v8_typed_array_max_size_in_heap[FlagInfo].value))
context = cc_common.create_compilation_context(defines = depset(defs))
return [CcInfo(compilation_context = context)]
v8_custom_config = rule(
implementation = _custom_config_impl,
attrs = {
"_v8_typed_array_max_size_in_heap": attr.label(default = ":v8_typed_array_max_size_in_heap"),
},
)
def _config_impl(ctx):
hdrs = []
# Add headers
for h in ctx.attr.hdrs:
hdrs += h[DefaultInfo].files.to_list()
defs = []
# Add conditional_defines
for f, d in ctx.attr.conditional_defines.items():
if f[FlagInfo].value:
defs.append(d)
# Add defines
for d in ctx.attr.defines:
defs.append(d)
context = cc_common.create_compilation_context(
defines = depset(
defs,
transitive = [dep[CcInfo].compilation_context.defines for dep in ctx.attr.deps],
),
headers = depset(
hdrs,
transitive = [dep[CcInfo].compilation_context.headers for dep in ctx.attr.deps],
),
)
return [CcInfo(compilation_context = context)]
v8_config = rule(
implementation = _config_impl,
attrs = {
"conditional_defines": attr.label_keyed_string_dict(),
"defines": attr.string_list(),
"deps": attr.label_list(),
"hdrs": attr.label_list(allow_files = True),
},
)
def _default_args():
return struct(
deps = [":define_flags"],
defines = select({
"@v8//bazel/config:is_windows": [
"UNICODE",
"_UNICODE",
"_CRT_RAND_S",
"_WIN32_WINNT=0x0602", # Override bazel default to Windows 8
],
"//conditions:default": [],
}),
copts = select({
"@v8//bazel/config:is_posix": [
"-fPIC",
"-fno-strict-aliasing",
"-Werror",
"-Wextra",
"-Wno-unknown-warning-option",
"-Wno-bitwise-instead-of-logical",
"-Wno-builtin-assume-aligned-alignment",
"-Wno-unused-parameter",
"-Wno-implicit-int-float-conversion",
"-Wno-deprecated-copy",
"-Wno-non-virtual-dtor",
"-isystem .",
],
"//conditions:default": [],
}) + select({
"@v8//bazel/config:is_clang": [
"-Wno-invalid-offsetof",
"-std=c++17",
],
"@v8//bazel/config:is_gcc": [
"-Wno-extra",
"-Wno-array-bounds",
"-Wno-class-memaccess",
"-Wno-comments",
"-Wno-deprecated-declarations",
"-Wno-implicit-fallthrough",
"-Wno-int-in-bool-context",
"-Wno-maybe-uninitialized",
"-Wno-mismatched-new-delete",
"-Wno-redundant-move",
"-Wno-return-type",
"-Wno-stringop-overflow",
# Use GNU dialect, because GCC doesn't allow using
# ##__VA_ARGS__ when in standards-conforming mode.
"-std=gnu++17",
],
"@v8//bazel/config:is_windows": [
"/std:c++17",
],
"//conditions:default": [],
}) + select({
"@v8//bazel/config:is_gcc_fastbuild": [
# Non-debug builds without optimizations fail because
# of recursive inlining of "always_inline" functions.
"-O1",
],
"//conditions:default": [],
}) + select({
"@v8//bazel/config:is_clang_s390x": [
"-fno-integrated-as",
],
"//conditions:default": [],
}),
cxxopts = select({
"//third_party/v8/HEAD/google3/config:is_opt": [
"-fvisibility=hidden",
"-fvisibility-inlines-hidden",
],
"//conditions:default": [
],
}),
includes = ["include"],
linkopts = select({
"@v8//bazel/config:is_windows": [
"Winmm.lib",
"DbgHelp.lib",
"Advapi32.lib",
],
"@v8//bazel/config:is_macos": ["-pthread"],
"//conditions:default": ["-Wl,--no-as-needed -ldl -pthread"],
}) + select({
":should_add_rdynamic": ["-rdynamic"],
"//conditions:default": [],
}),
)
ENABLE_I18N_SUPPORT_DEFINES = [
"-DV8_INTL_SUPPORT",
"-DICU_UTIL_DATA_IMPL=ICU_UTIL_DATA_STATIC",
# src/regexp/regexp-compiler-tonode.cc uses an unsafe ICU method and
# access a character implicitly.
"-DUNISTR_FROM_CHAR_EXPLICIT=",
]
def _should_emit_noicu_and_icu(noicu_srcs, noicu_deps, icu_srcs, icu_deps):
return noicu_srcs != [] or noicu_deps != [] or icu_srcs != [] or icu_deps != []
# buildifier: disable=function-docstring
def v8_binary(
name,
srcs,
deps = [],
includes = [],
copts = [],
linkopts = [],
noicu_srcs = [],
noicu_deps = [],
icu_srcs = [],
icu_deps = [],
**kwargs):
default = _default_args()
if _should_emit_noicu_and_icu(noicu_srcs, noicu_deps, icu_srcs, icu_deps):
native.cc_binary(
name = "noicu/" + name,
srcs = srcs + noicu_srcs,
deps = deps + noicu_deps + default.deps,
includes = includes + default.includes,
copts = copts + default.copts,
linkopts = linkopts + default.linkopts,
**kwargs
)
native.cc_binary(
name = "icu/" + name,
srcs = srcs + icu_srcs,
deps = deps + icu_deps + default.deps,
includes = includes + default.includes,
copts = copts + default.copts + ENABLE_I18N_SUPPORT_DEFINES,
linkopts = linkopts + default.linkopts,
**kwargs
)
else:
native.cc_binary(
name = name,
srcs = srcs,
deps = deps + default.deps,
includes = includes + default.includes,
copts = copts + default.copts,
linkopts = linkopts + default.linkopts,
**kwargs
)
# buildifier: disable=function-docstring
def v8_library(
name,
srcs,
deps = [],
includes = [],
copts = [],
linkopts = [],
noicu_srcs = [],
noicu_deps = [],
icu_srcs = [],
icu_deps = [],
**kwargs):
default = _default_args()
if _should_emit_noicu_and_icu(noicu_srcs, noicu_deps, icu_srcs, icu_deps):
native.cc_library(
name = name + "_noicu",
srcs = srcs + noicu_srcs,
deps = deps + noicu_deps + default.deps,
includes = includes + default.includes,
copts = copts + default.copts,
linkopts = linkopts + default.linkopts,
alwayslink = 1,
linkstatic = 1,
**kwargs
)
# Alias target used because of cc_library bug in bazel on windows
# https://github.com/bazelbuild/bazel/issues/14237
# TODO(victorgomes): Remove alias once bug is fixed
native.alias(
name = "noicu/" + name,
actual = name + "_noicu",
)
native.cc_library(
name = name + "_icu",
srcs = srcs + icu_srcs,
deps = deps + icu_deps + default.deps,
includes = includes + default.includes,
copts = copts + default.copts + ENABLE_I18N_SUPPORT_DEFINES,
linkopts = linkopts + default.linkopts,
alwayslink = 1,
linkstatic = 1,
**kwargs
)
# Alias target used because of cc_library bug in bazel on windows
# https://github.com/bazelbuild/bazel/issues/14237
# TODO(victorgomes): Remove alias once bug is fixed
native.alias(
name = "icu/" + name,
actual = name + "_icu",
)
else:
native.cc_library(
name = name,
srcs = srcs,
deps = deps + default.deps,
includes = includes + default.includes,
copts = copts + default.copts,
linkopts = linkopts + default.linkopts,
alwayslink = 1,
linkstatic = 1,
**kwargs
)
def _torque_impl(ctx):
if ctx.workspace_name == "v8":
v8root = "."
else:
v8root = "external/v8"
# Arguments
args = []
args += ctx.attr.args
args.append("-o")
args.append(ctx.bin_dir.path + "/" + v8root + "/" + ctx.attr.prefix + "/torque-generated")
args.append("-strip-v8-root")
args.append("-v8-root")
args.append(v8root)
# Sources
args += [f.path for f in ctx.files.srcs]
# Generate/declare output files
outs = []
for src in ctx.files.srcs:
root, period, ext = src.path.rpartition(".")
# Strip v8root
if root[:len(v8root)] == v8root:
root = root[len(v8root):]
file = ctx.attr.prefix + "/torque-generated/" + root
outs.append(ctx.actions.declare_file(file + "-tq-csa.cc"))
outs.append(ctx.actions.declare_file(file + "-tq-csa.h"))
outs.append(ctx.actions.declare_file(file + "-tq-inl.inc"))
outs.append(ctx.actions.declare_file(file + "-tq.inc"))
outs.append(ctx.actions.declare_file(file + "-tq.cc"))
outs += [ctx.actions.declare_file(ctx.attr.prefix + "/torque-generated/" + f) for f in ctx.attr.extras]
ctx.actions.run(
outputs = outs,
inputs = ctx.files.srcs,
arguments = args,
executable = ctx.executable.tool,
mnemonic = "GenTorque",
progress_message = "Generating Torque files",
)
return [DefaultInfo(files = depset(outs))]
_v8_torque = rule(
implementation = _torque_impl,
# cfg = v8_target_cpu_transition,
attrs = {
"prefix": attr.string(mandatory = True),
"srcs": attr.label_list(allow_files = True, mandatory = True),
"extras": attr.string_list(),
"tool": attr.label(
allow_files = True,
executable = True,
cfg = "exec",
),
"args": attr.string_list(),
},
)
def v8_torque(name, noicu_srcs, icu_srcs, args, extras):
_v8_torque(
name = "noicu/" + name,
prefix = "noicu",
srcs = noicu_srcs,
args = args,
extras = extras,
tool = select({
"@v8//bazel/config:v8_target_is_32_bits": ":torque_non_pointer_compression",
"//conditions:default": ":torque",
}),
)
_v8_torque(
name = "icu/" + name,
prefix = "icu",
srcs = icu_srcs,
args = args,
extras = extras,
tool = select({
"@v8//bazel/config:v8_target_is_32_bits": ":torque_non_pointer_compression",
"//conditions:default": ":torque",
}),
)
def _v8_target_cpu_transition_impl(settings, attr):
# Check for an existing v8_target_cpu flag.
if "@v8//bazel/config:v8_target_cpu" in settings:
if settings["@v8//bazel/config:v8_target_cpu"] != "none":
return
# Auto-detect target architecture based on the --cpu flag.
mapping = {
"haswell": "x64",
"k8": "x64",
"x86_64": "x64",
"darwin": "x64",
"darwin_x86_64": "x64",
"x64_windows": "x64",
"x86": "ia32",
"aarch64": "arm64",
"arm64-v8a": "arm64",
"arm": "arm64",
"darwin_arm64": "arm64",
"armeabi-v7a": "arm32",
"s390x": "s390x",
"riscv64": "riscv64",
"ppc": "ppc64le",
}
v8_target_cpu = mapping[settings["//command_line_option:cpu"]]
return {"@v8//bazel/config:v8_target_cpu": v8_target_cpu}
# Set the v8_target_cpu to be the correct architecture given the cpu specified
# on the command line.
v8_target_cpu_transition = transition(
implementation = _v8_target_cpu_transition_impl,
inputs = ["@v8//bazel/config:v8_target_cpu", "//command_line_option:cpu"],
outputs = ["@v8//bazel/config:v8_target_cpu"],
)
def _mksnapshot(ctx):
prefix = ctx.attr.prefix
suffix = ctx.attr.suffix
outs = [
ctx.actions.declare_file(prefix + "/snapshot" + suffix + ".cc"),
ctx.actions.declare_file(prefix + "/embedded" + suffix + ".S"),
]
ctx.actions.run(
outputs = outs,
inputs = [],
arguments = [
"--embedded_variant=Default",
"--target_os",
ctx.attr.target_os,
"--startup_src",
outs[0].path,
"--embedded_src",
outs[1].path,
] + ctx.attr.args,
executable = ctx.executable.tool,
progress_message = "Running mksnapshot",
)
return [DefaultInfo(files = depset(outs))]
_v8_mksnapshot = rule(
implementation = _mksnapshot,
attrs = {
"args": attr.string_list(),
"tool": attr.label(
mandatory = True,
allow_files = True,
executable = True,
cfg = "exec",
),
"target_os": attr.string(mandatory = True),
"_allowlist_function_transition": attr.label(
default = "@bazel_tools//tools/allowlists/function_transition_allowlist",
),
"prefix": attr.string(mandatory = True),
"suffix": attr.string(mandatory = True),
},
cfg = v8_target_cpu_transition,
)
def v8_mksnapshot(name, args, suffix = ""):
_v8_mksnapshot(
name = "noicu/" + name,
args = args,
prefix = "noicu",
tool = ":noicu/mksnapshot" + suffix,
suffix = suffix,
target_os = select({
"@v8//bazel/config:is_macos": "mac",
"//conditions:default": "",
}),
)
_v8_mksnapshot(
name = "icu/" + name,
args = args,
prefix = "icu",
tool = ":icu/mksnapshot" + suffix,
suffix = suffix,
target_os = select({
"@v8//bazel/config:is_macos": "mac",
"//conditions:default": "",
}),
)
def _quote(val):
if val[0] == '"' and val[-1] == '"':
fail("String", val, "already quoted")
return '"' + val + '"'
def _kv_bool_pair(k, v):
return _quote(k) + ": " + v
def _json(kv_pairs):
content = "{"
for (k, v) in kv_pairs[:-1]:
content += _kv_bool_pair(k, v) + ", "
(k, v) = kv_pairs[-1]
content += _kv_bool_pair(k, v)
content += "}\n"
return content
def build_config_content(cpu, icu):
return _json([
("current_cpu", cpu),
("dcheck_always_on", "false"),
("is_android", "false"),
("is_asan", "false"),
("is_cfi", "false"),
("is_clang", "true"),
("is_component_build", "false"),
("is_debug", "false"),
("is_full_debug", "false"),
("is_gcov_coverage", "false"),
("is_msan", "false"),
("is_tsan", "false"),
("is_ubsan_vptr", "false"),
("target_cpu", cpu),
("v8_current_cpu", cpu),
("v8_dict_property_const_tracking", "false"),
("v8_enable_atomic_object_field_writes", "false"),
("v8_enable_conservative_stack_scanning", "false"),
("v8_enable_concurrent_marking", "false"),
("v8_enable_i18n_support", icu),
("v8_enable_verify_predictable", "false"),
("v8_enable_verify_csa", "false"),
("v8_enable_lite_mode", "false"),
("v8_enable_runtime_call_stats", "false"),
("v8_enable_pointer_compression", "true"),
("v8_enable_pointer_compression_shared_cage", "false"),
("v8_enable_third_party_heap", "false"),
("v8_enable_webassembly", "false"),
("v8_control_flow_integrity", "false"),
("v8_enable_single_generation", "false"),
("v8_enable_sandbox", "false"),
("v8_enable_shared_ro_heap", "false"),
("v8_disable_write_barriers", "false"),
("v8_target_cpu", cpu),
("v8_code_comments", "false"),
("v8_enable_debug_code", "false"),
("v8_enable_verify_heap", "false"),
("v8_enable_slow_dchecks", "false"),
("v8_enable_maglev", "false"),
("v8_enable_turbofan", "true"),
("v8_enable_disassembler", "false"),
("is_DEBUG_defined", "false"),
("v8_enable_gdbjit", "false"),
])
# TODO(victorgomes): Create a rule (instead of a macro), that can
# dynamically populate the build config.
def v8_build_config(name):
cpu = _quote("x64")
native.genrule(
name = "noicu/" + name,
outs = ["noicu/" + name + ".json"],
cmd = "echo '" + build_config_content(cpu, "false") + "' > \"$@\"",
)
native.genrule(
name = "icu/" + name,
outs = ["icu/" + name + ".json"],
cmd = "echo '" + build_config_content(cpu, "true") + "' > \"$@\"",
)
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