e5f1ac1ded
BUG=v8:2990 LOG=n R=hpayer@chromium.org Review URL: https://codereview.chromium.org/144023009 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18752 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
900 lines
38 KiB
C++
900 lines
38 KiB
C++
// Copyright 2012 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// This file defines all of the flags. It is separated into different section,
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// for Debug, Release, Logging and Profiling, etc. To add a new flag, find the
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// correct section, and use one of the DEFINE_ macros, without a trailing ';'.
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//
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// This include does not have a guard, because it is a template-style include,
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// which can be included multiple times in different modes. It expects to have
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// a mode defined before it's included. The modes are FLAG_MODE_... below:
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// We want to declare the names of the variables for the header file. Normally
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// this will just be an extern declaration, but for a readonly flag we let the
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// compiler make better optimizations by giving it the value.
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#if defined(FLAG_MODE_DECLARE)
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#define FLAG_FULL(ftype, ctype, nam, def, cmt) \
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extern ctype FLAG_##nam;
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#define FLAG_READONLY(ftype, ctype, nam, def, cmt) \
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static ctype const FLAG_##nam = def;
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// We want to supply the actual storage and value for the flag variable in the
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// .cc file. We only do this for writable flags.
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#elif defined(FLAG_MODE_DEFINE)
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#define FLAG_FULL(ftype, ctype, nam, def, cmt) \
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ctype FLAG_##nam = def;
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// We need to define all of our default values so that the Flag structure can
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// access them by pointer. These are just used internally inside of one .cc,
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// for MODE_META, so there is no impact on the flags interface.
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#elif defined(FLAG_MODE_DEFINE_DEFAULTS)
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#define FLAG_FULL(ftype, ctype, nam, def, cmt) \
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static ctype const FLAGDEFAULT_##nam = def;
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// We want to write entries into our meta data table, for internal parsing and
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// printing / etc in the flag parser code. We only do this for writable flags.
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#elif defined(FLAG_MODE_META)
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#define FLAG_FULL(ftype, ctype, nam, def, cmt) \
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{ Flag::TYPE_##ftype, #nam, &FLAG_##nam, &FLAGDEFAULT_##nam, cmt, false },
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#define FLAG_ALIAS(ftype, ctype, alias, nam) \
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{ Flag::TYPE_##ftype, #alias, &FLAG_##nam, &FLAGDEFAULT_##nam, \
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"alias for --"#nam, false },
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// We produce the code to set flags when it is implied by another flag.
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#elif defined(FLAG_MODE_DEFINE_IMPLICATIONS)
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#define DEFINE_implication(whenflag, thenflag) \
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if (FLAG_##whenflag) FLAG_##thenflag = true;
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#define DEFINE_neg_implication(whenflag, thenflag) \
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if (FLAG_##whenflag) FLAG_##thenflag = false;
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#else
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#error No mode supplied when including flags.defs
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#endif
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// Dummy defines for modes where it is not relevant.
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#ifndef FLAG_FULL
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#define FLAG_FULL(ftype, ctype, nam, def, cmt)
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#endif
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#ifndef FLAG_READONLY
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#define FLAG_READONLY(ftype, ctype, nam, def, cmt)
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#endif
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#ifndef FLAG_ALIAS
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#define FLAG_ALIAS(ftype, ctype, alias, nam)
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#endif
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#ifndef DEFINE_implication
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#define DEFINE_implication(whenflag, thenflag)
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#endif
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#ifndef DEFINE_neg_implication
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#define DEFINE_neg_implication(whenflag, thenflag)
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#endif
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#define COMMA ,
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#ifdef FLAG_MODE_DECLARE
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// Structure used to hold a collection of arguments to the JavaScript code.
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struct JSArguments {
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public:
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inline const char*& operator[] (int idx) const {
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return argv[idx];
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}
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static JSArguments Create(int argc, const char** argv) {
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JSArguments args;
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args.argc = argc;
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args.argv = argv;
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return args;
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}
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int argc;
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const char** argv;
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};
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struct MaybeBoolFlag {
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static MaybeBoolFlag Create(bool has_value, bool value) {
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MaybeBoolFlag flag;
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flag.has_value = has_value;
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flag.value = value;
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return flag;
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}
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bool has_value;
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bool value;
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};
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#endif
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#if (defined CAN_USE_VFP3_INSTRUCTIONS) || !(defined ARM_TEST)
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# define ENABLE_VFP3_DEFAULT true
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#else
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# define ENABLE_VFP3_DEFAULT false
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#endif
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#if (defined CAN_USE_ARMV7_INSTRUCTIONS) || !(defined ARM_TEST)
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# define ENABLE_ARMV7_DEFAULT true
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#else
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# define ENABLE_ARMV7_DEFAULT false
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#endif
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#if (defined CAN_USE_VFP32DREGS) || !(defined ARM_TEST)
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# define ENABLE_32DREGS_DEFAULT true
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#else
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# define ENABLE_32DREGS_DEFAULT false
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#endif
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#define DEFINE_bool(nam, def, cmt) FLAG(BOOL, bool, nam, def, cmt)
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#define DEFINE_maybe_bool(nam, cmt) FLAG(MAYBE_BOOL, MaybeBoolFlag, nam, \
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{ false COMMA false }, cmt)
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#define DEFINE_int(nam, def, cmt) FLAG(INT, int, nam, def, cmt)
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#define DEFINE_float(nam, def, cmt) FLAG(FLOAT, double, nam, def, cmt)
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#define DEFINE_string(nam, def, cmt) FLAG(STRING, const char*, nam, def, cmt)
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#define DEFINE_args(nam, cmt) FLAG(ARGS, JSArguments, nam, \
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{ 0 COMMA NULL }, cmt)
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#define DEFINE_ALIAS_bool(alias, nam) FLAG_ALIAS(BOOL, bool, alias, nam)
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#define DEFINE_ALIAS_int(alias, nam) FLAG_ALIAS(INT, int, alias, nam)
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#define DEFINE_ALIAS_float(alias, nam) FLAG_ALIAS(FLOAT, double, alias, nam)
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#define DEFINE_ALIAS_string(alias, nam) \
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FLAG_ALIAS(STRING, const char*, alias, nam)
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#define DEFINE_ALIAS_args(alias, nam) FLAG_ALIAS(ARGS, JSArguments, alias, nam)
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//
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// Flags in all modes.
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//
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#define FLAG FLAG_FULL
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// Flags for language modes and experimental language features.
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DEFINE_bool(use_strict, false, "enforce strict mode")
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DEFINE_bool(es5_readonly, true,
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"activate correct semantics for inheriting readonliness")
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DEFINE_bool(es52_globals, true,
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"activate new semantics for global var declarations")
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DEFINE_bool(harmony_typeof, false, "enable harmony semantics for typeof")
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DEFINE_bool(harmony_scoping, false, "enable harmony block scoping")
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DEFINE_bool(harmony_modules, false,
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"enable harmony modules (implies block scoping)")
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DEFINE_bool(harmony_symbols, false,
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"enable harmony symbols (a.k.a. private names)")
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DEFINE_bool(harmony_promises, false, "enable harmony promises")
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DEFINE_bool(harmony_proxies, false, "enable harmony proxies")
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DEFINE_bool(harmony_collections, false,
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"enable harmony collections (sets, maps, and weak maps)")
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DEFINE_bool(harmony_observation, false,
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"enable harmony object observation (implies harmony collections")
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DEFINE_bool(harmony_generators, false, "enable harmony generators")
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DEFINE_bool(harmony_iteration, false, "enable harmony iteration (for-of)")
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DEFINE_bool(harmony_numeric_literals, false,
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"enable harmony numeric literals (0o77, 0b11)")
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DEFINE_bool(harmony_strings, false, "enable harmony string")
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DEFINE_bool(harmony_arrays, false, "enable harmony arrays")
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DEFINE_bool(harmony_maths, false, "enable harmony math functions")
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DEFINE_bool(harmony, false, "enable all harmony features (except typeof)")
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DEFINE_implication(harmony, harmony_scoping)
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DEFINE_implication(harmony, harmony_modules)
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DEFINE_implication(harmony, harmony_symbols)
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DEFINE_implication(harmony, harmony_promises)
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DEFINE_implication(harmony, harmony_proxies)
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DEFINE_implication(harmony, harmony_collections)
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DEFINE_implication(harmony, harmony_observation)
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DEFINE_implication(harmony, harmony_generators)
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DEFINE_implication(harmony, harmony_iteration)
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DEFINE_implication(harmony, harmony_numeric_literals)
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DEFINE_implication(harmony, harmony_strings)
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DEFINE_implication(harmony, harmony_arrays)
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DEFINE_implication(harmony, harmony_maths)
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DEFINE_implication(harmony_promises, harmony_collections)
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DEFINE_implication(harmony_modules, harmony_scoping)
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DEFINE_implication(harmony_observation, harmony_collections)
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// Flags for experimental implementation features.
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DEFINE_bool(packed_arrays, true, "optimizes arrays that have no holes")
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DEFINE_bool(smi_only_arrays, true, "tracks arrays with only smi values")
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DEFINE_bool(compiled_keyed_dictionary_loads, true,
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"use optimizing compiler to generate keyed dictionary load stubs")
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DEFINE_bool(clever_optimizations, true,
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"Optimize object size, Array shift, DOM strings and string +")
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DEFINE_bool(pretenuring, true, "allocate objects in old space")
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// TODO(hpayer): We will remove this flag as soon as we have pretenuring
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// support for specific allocation sites.
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DEFINE_bool(pretenuring_call_new, false, "pretenure call new")
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DEFINE_bool(allocation_site_pretenuring, true,
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"pretenure with allocation sites")
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DEFINE_bool(trace_pretenuring, false,
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"trace pretenuring decisions of HAllocate instructions")
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DEFINE_bool(track_fields, true, "track fields with only smi values")
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DEFINE_bool(track_double_fields, true, "track fields with double values")
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DEFINE_bool(track_heap_object_fields, true, "track fields with heap values")
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DEFINE_bool(track_computed_fields, true, "track computed boilerplate fields")
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DEFINE_implication(track_double_fields, track_fields)
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DEFINE_implication(track_heap_object_fields, track_fields)
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DEFINE_implication(track_computed_fields, track_fields)
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DEFINE_bool(smi_binop, true, "support smi representation in binary operations")
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// Flags for optimization types.
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DEFINE_bool(optimize_for_size, false,
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"Enables optimizations which favor memory size over execution "
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"speed.")
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// Flags for data representation optimizations
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DEFINE_bool(unbox_double_arrays, true, "automatically unbox arrays of doubles")
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DEFINE_bool(string_slices, true, "use string slices")
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// Flags for Crankshaft.
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DEFINE_bool(crankshaft, true, "use crankshaft")
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DEFINE_string(hydrogen_filter, "*", "optimization filter")
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DEFINE_bool(use_range, true, "use hydrogen range analysis")
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DEFINE_bool(use_gvn, true, "use hydrogen global value numbering")
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DEFINE_bool(use_canonicalizing, true, "use hydrogen instruction canonicalizing")
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DEFINE_bool(use_inlining, true, "use function inlining")
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DEFINE_bool(use_escape_analysis, false, "use hydrogen escape analysis")
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DEFINE_bool(use_allocation_folding, true, "use allocation folding")
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DEFINE_int(max_inlining_levels, 5, "maximum number of inlining levels")
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DEFINE_int(max_inlined_source_size, 600,
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"maximum source size in bytes considered for a single inlining")
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DEFINE_int(max_inlined_nodes, 196,
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"maximum number of AST nodes considered for a single inlining")
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DEFINE_int(max_inlined_nodes_cumulative, 400,
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"maximum cumulative number of AST nodes considered for inlining")
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DEFINE_bool(loop_invariant_code_motion, true, "loop invariant code motion")
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DEFINE_bool(fast_math, true, "faster (but maybe less accurate) math functions")
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DEFINE_bool(collect_megamorphic_maps_from_stub_cache, true,
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"crankshaft harvests type feedback from stub cache")
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DEFINE_bool(hydrogen_stats, false, "print statistics for hydrogen")
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DEFINE_bool(trace_check_elimination, false, "trace check elimination phase")
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DEFINE_bool(trace_hydrogen, false, "trace generated hydrogen to file")
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DEFINE_string(trace_hydrogen_filter, "*", "hydrogen tracing filter")
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DEFINE_bool(trace_hydrogen_stubs, false, "trace generated hydrogen for stubs")
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DEFINE_string(trace_hydrogen_file, NULL, "trace hydrogen to given file name")
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DEFINE_string(trace_phase, "HLZ", "trace generated IR for specified phases")
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DEFINE_bool(trace_inlining, false, "trace inlining decisions")
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DEFINE_bool(trace_load_elimination, false, "trace load elimination")
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DEFINE_bool(trace_alloc, false, "trace register allocator")
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DEFINE_bool(trace_all_uses, false, "trace all use positions")
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DEFINE_bool(trace_range, false, "trace range analysis")
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DEFINE_bool(trace_gvn, false, "trace global value numbering")
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DEFINE_bool(trace_representation, false, "trace representation types")
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DEFINE_bool(trace_escape_analysis, false, "trace hydrogen escape analysis")
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DEFINE_bool(trace_allocation_folding, false, "trace allocation folding")
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DEFINE_bool(trace_track_allocation_sites, false,
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"trace the tracking of allocation sites")
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DEFINE_bool(trace_migration, false, "trace object migration")
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DEFINE_bool(trace_generalization, false, "trace map generalization")
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DEFINE_bool(stress_pointer_maps, false, "pointer map for every instruction")
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DEFINE_bool(stress_environments, false, "environment for every instruction")
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DEFINE_int(deopt_every_n_times, 0,
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"deoptimize every n times a deopt point is passed")
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DEFINE_int(deopt_every_n_garbage_collections, 0,
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"deoptimize every n garbage collections")
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DEFINE_bool(print_deopt_stress, false, "print number of possible deopt points")
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DEFINE_bool(trap_on_deopt, false, "put a break point before deoptimizing")
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DEFINE_bool(trap_on_stub_deopt, false,
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"put a break point before deoptimizing a stub")
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DEFINE_bool(deoptimize_uncommon_cases, true, "deoptimize uncommon cases")
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DEFINE_bool(polymorphic_inlining, true, "polymorphic inlining")
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DEFINE_bool(use_osr, true, "use on-stack replacement")
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DEFINE_bool(array_bounds_checks_elimination, true,
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"perform array bounds checks elimination")
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DEFINE_bool(array_bounds_checks_hoisting, false,
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"perform array bounds checks hoisting")
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DEFINE_bool(array_index_dehoisting, true,
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"perform array index dehoisting")
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DEFINE_bool(analyze_environment_liveness, true,
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"analyze liveness of environment slots and zap dead values")
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DEFINE_bool(load_elimination, true, "use load elimination")
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DEFINE_bool(check_elimination, true, "use check elimination")
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DEFINE_bool(dead_code_elimination, true, "use dead code elimination")
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DEFINE_bool(fold_constants, true, "use constant folding")
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DEFINE_bool(trace_dead_code_elimination, false, "trace dead code elimination")
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DEFINE_bool(unreachable_code_elimination, true, "eliminate unreachable code")
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DEFINE_bool(trace_osr, false, "trace on-stack replacement")
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DEFINE_int(stress_runs, 0, "number of stress runs")
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DEFINE_bool(optimize_closures, true, "optimize closures")
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DEFINE_bool(lookup_sample_by_shared, true,
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"when picking a function to optimize, watch for shared function "
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"info, not JSFunction itself")
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DEFINE_bool(cache_optimized_code, true,
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"cache optimized code for closures")
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DEFINE_bool(flush_optimized_code_cache, true,
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"flushes the cache of optimized code for closures on every GC")
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DEFINE_bool(inline_construct, true, "inline constructor calls")
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DEFINE_bool(inline_arguments, true, "inline functions with arguments object")
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DEFINE_bool(inline_accessors, true, "inline JavaScript accessors")
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DEFINE_int(escape_analysis_iterations, 2,
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"maximum number of escape analysis fix-point iterations")
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DEFINE_bool(optimize_for_in, true,
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"optimize functions containing for-in loops")
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DEFINE_bool(opt_safe_uint32_operations, true,
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"allow uint32 values on optimize frames if they are used only in "
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"safe operations")
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DEFINE_bool(concurrent_recompilation, true,
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"optimizing hot functions asynchronously on a separate thread")
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DEFINE_bool(trace_concurrent_recompilation, false,
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"track concurrent recompilation")
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DEFINE_int(concurrent_recompilation_queue_length, 8,
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"the length of the concurrent compilation queue")
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DEFINE_int(concurrent_recompilation_delay, 0,
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"artificial compilation delay in ms")
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DEFINE_bool(block_concurrent_recompilation, false,
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"block queued jobs until released")
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DEFINE_bool(concurrent_osr, false,
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"concurrent on-stack replacement")
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DEFINE_implication(concurrent_osr, concurrent_recompilation)
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DEFINE_bool(omit_map_checks_for_leaf_maps, true,
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"do not emit check maps for constant values that have a leaf map, "
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"deoptimize the optimized code if the layout of the maps changes.")
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// Profiler flags.
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DEFINE_int(frame_count, 1, "number of stack frames inspected by the profiler")
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// 0x1700 fits in the immediate field of an ARM instruction.
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DEFINE_int(interrupt_budget, 0x1700,
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"execution budget before interrupt is triggered")
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DEFINE_int(type_info_threshold, 25,
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"percentage of ICs that must have type info to allow optimization")
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DEFINE_int(self_opt_count, 130, "call count before self-optimization")
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DEFINE_bool(trace_opt_verbose, false, "extra verbose compilation tracing")
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DEFINE_implication(trace_opt_verbose, trace_opt)
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// assembler-ia32.cc / assembler-arm.cc / assembler-x64.cc
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DEFINE_bool(debug_code, false,
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"generate extra code (assertions) for debugging")
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DEFINE_bool(code_comments, false, "emit comments in code disassembly")
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DEFINE_bool(enable_sse2, true,
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"enable use of SSE2 instructions if available")
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DEFINE_bool(enable_sse3, true,
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"enable use of SSE3 instructions if available")
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DEFINE_bool(enable_sse4_1, true,
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"enable use of SSE4.1 instructions if available")
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DEFINE_bool(enable_cmov, true,
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"enable use of CMOV instruction if available")
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DEFINE_bool(enable_sahf, true,
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"enable use of SAHF instruction if available (X64 only)")
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DEFINE_bool(enable_vfp3, ENABLE_VFP3_DEFAULT,
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"enable use of VFP3 instructions if available")
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DEFINE_bool(enable_armv7, ENABLE_ARMV7_DEFAULT,
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"enable use of ARMv7 instructions if available (ARM only)")
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DEFINE_bool(enable_neon, true,
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"enable use of NEON instructions if available (ARM only)")
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DEFINE_bool(enable_sudiv, true,
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"enable use of SDIV and UDIV instructions if available (ARM only)")
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DEFINE_bool(enable_movw_movt, false,
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"enable loading 32-bit constant by means of movw/movt "
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"instruction pairs (ARM only)")
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DEFINE_bool(enable_unaligned_accesses, true,
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"enable unaligned accesses for ARMv7 (ARM only)")
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DEFINE_bool(enable_32dregs, ENABLE_32DREGS_DEFAULT,
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"enable use of d16-d31 registers on ARM - this requires VFP3")
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DEFINE_bool(enable_vldr_imm, false,
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"enable use of constant pools for double immediate (ARM only)")
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// bootstrapper.cc
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DEFINE_string(expose_natives_as, NULL, "expose natives in global object")
|
|
DEFINE_string(expose_debug_as, NULL, "expose debug in global object")
|
|
DEFINE_bool(expose_free_buffer, false, "expose freeBuffer extension")
|
|
DEFINE_bool(expose_gc, false, "expose gc extension")
|
|
DEFINE_string(expose_gc_as, NULL,
|
|
"expose gc extension under the specified name")
|
|
DEFINE_implication(expose_gc_as, expose_gc)
|
|
DEFINE_bool(expose_externalize_string, false,
|
|
"expose externalize string extension")
|
|
DEFINE_bool(expose_trigger_failure, false, "expose trigger-failure extension")
|
|
DEFINE_int(stack_trace_limit, 10, "number of stack frames to capture")
|
|
DEFINE_bool(builtins_in_stack_traces, false,
|
|
"show built-in functions in stack traces")
|
|
DEFINE_bool(disable_native_files, false, "disable builtin natives files")
|
|
|
|
// builtins-ia32.cc
|
|
DEFINE_bool(inline_new, true, "use fast inline allocation")
|
|
|
|
// checks.cc
|
|
DEFINE_bool(stack_trace_on_abort, true,
|
|
"print a stack trace if an assertion failure occurs")
|
|
|
|
// codegen-ia32.cc / codegen-arm.cc
|
|
DEFINE_bool(trace_codegen, false,
|
|
"print name of functions for which code is generated")
|
|
DEFINE_bool(trace, false, "trace function calls")
|
|
DEFINE_bool(mask_constants_with_cookie, true,
|
|
"use random jit cookie to mask large constants")
|
|
|
|
// codegen.cc
|
|
DEFINE_bool(lazy, true, "use lazy compilation")
|
|
DEFINE_bool(trace_opt, false, "trace lazy optimization")
|
|
DEFINE_bool(trace_opt_stats, false, "trace lazy optimization statistics")
|
|
DEFINE_bool(opt, true, "use adaptive optimizations")
|
|
DEFINE_bool(always_opt, false, "always try to optimize functions")
|
|
DEFINE_bool(always_osr, false, "always try to OSR functions")
|
|
DEFINE_bool(prepare_always_opt, false, "prepare for turning on always opt")
|
|
DEFINE_bool(trace_deopt, false, "trace optimize function deoptimization")
|
|
DEFINE_bool(trace_stub_failures, false,
|
|
"trace deoptimization of generated code stubs")
|
|
|
|
// compiler.cc
|
|
DEFINE_int(min_preparse_length, 1024,
|
|
"minimum length for automatic enable preparsing")
|
|
DEFINE_bool(always_full_compiler, false,
|
|
"try to use the dedicated run-once backend for all code")
|
|
DEFINE_int(max_opt_count, 10,
|
|
"maximum number of optimization attempts before giving up.")
|
|
|
|
// compilation-cache.cc
|
|
DEFINE_bool(compilation_cache, true, "enable compilation cache")
|
|
|
|
DEFINE_bool(cache_prototype_transitions, true, "cache prototype transitions")
|
|
|
|
// cpu-profiler.cc
|
|
DEFINE_int(cpu_profiler_sampling_interval, 1000,
|
|
"CPU profiler sampling interval in microseconds")
|
|
|
|
// debug.cc
|
|
DEFINE_bool(trace_debug_json, false, "trace debugging JSON request/response")
|
|
DEFINE_bool(trace_js_array_abuse, false,
|
|
"trace out-of-bounds accesses to JS arrays")
|
|
DEFINE_bool(trace_external_array_abuse, false,
|
|
"trace out-of-bounds-accesses to external arrays")
|
|
DEFINE_bool(trace_array_abuse, false,
|
|
"trace out-of-bounds accesses to all arrays")
|
|
DEFINE_implication(trace_array_abuse, trace_js_array_abuse)
|
|
DEFINE_implication(trace_array_abuse, trace_external_array_abuse)
|
|
DEFINE_bool(debugger_auto_break, true,
|
|
"automatically set the debug break flag when debugger commands are "
|
|
"in the queue")
|
|
DEFINE_bool(enable_liveedit, true, "enable liveedit experimental feature")
|
|
DEFINE_bool(break_on_abort, true, "always cause a debug break before aborting")
|
|
|
|
// execution.cc
|
|
// Slightly less than 1MB on 64-bit, since Windows' default stack size for
|
|
// the main execution thread is 1MB for both 32 and 64-bit.
|
|
DEFINE_int(stack_size, kPointerSize * 123,
|
|
"default size of stack region v8 is allowed to use (in kBytes)")
|
|
|
|
// frames.cc
|
|
DEFINE_int(max_stack_trace_source_length, 300,
|
|
"maximum length of function source code printed in a stack trace.")
|
|
|
|
// full-codegen.cc
|
|
DEFINE_bool(always_inline_smi_code, false,
|
|
"always inline smi code in non-opt code")
|
|
|
|
// heap.cc
|
|
DEFINE_int(max_new_space_size, 0, "max size of the new generation (in kBytes)")
|
|
DEFINE_int(max_old_space_size, 0, "max size of the old generation (in Mbytes)")
|
|
DEFINE_int(max_executable_size, 0, "max size of executable memory (in Mbytes)")
|
|
DEFINE_bool(gc_global, false, "always perform global GCs")
|
|
DEFINE_int(gc_interval, -1, "garbage collect after <n> allocations")
|
|
DEFINE_bool(trace_gc, false,
|
|
"print one trace line following each garbage collection")
|
|
DEFINE_bool(trace_gc_nvp, false,
|
|
"print one detailed trace line in name=value format "
|
|
"after each garbage collection")
|
|
DEFINE_bool(trace_gc_ignore_scavenger, false,
|
|
"do not print trace line after scavenger collection")
|
|
DEFINE_bool(print_cumulative_gc_stat, false,
|
|
"print cumulative GC statistics in name=value format on exit")
|
|
DEFINE_bool(print_max_heap_committed, false,
|
|
"print statistics of the maximum memory committed for the heap "
|
|
"in name=value format on exit")
|
|
DEFINE_bool(trace_gc_verbose, false,
|
|
"print more details following each garbage collection")
|
|
DEFINE_bool(trace_fragmentation, false,
|
|
"report fragmentation for old pointer and data pages")
|
|
DEFINE_bool(trace_external_memory, false,
|
|
"print amount of external allocated memory after each time "
|
|
"it is adjusted.")
|
|
DEFINE_bool(collect_maps, true,
|
|
"garbage collect maps from which no objects can be reached")
|
|
DEFINE_bool(weak_embedded_maps_in_optimized_code, true,
|
|
"make maps embedded in optimized code weak")
|
|
DEFINE_bool(weak_embedded_objects_in_optimized_code, true,
|
|
"make objects embedded in optimized code weak")
|
|
DEFINE_bool(flush_code, true,
|
|
"flush code that we expect not to use again (during full gc)")
|
|
DEFINE_bool(flush_code_incrementally, true,
|
|
"flush code that we expect not to use again (incrementally)")
|
|
DEFINE_bool(trace_code_flushing, false, "trace code flushing progress")
|
|
DEFINE_bool(age_code, true,
|
|
"track un-executed functions to age code and flush only "
|
|
"old code (required for code flushing)")
|
|
DEFINE_bool(incremental_marking, true, "use incremental marking")
|
|
DEFINE_bool(incremental_marking_steps, true, "do incremental marking steps")
|
|
DEFINE_bool(trace_incremental_marking, false,
|
|
"trace progress of the incremental marking")
|
|
DEFINE_bool(track_gc_object_stats, false,
|
|
"track object counts and memory usage")
|
|
DEFINE_bool(parallel_sweeping, true, "enable parallel sweeping")
|
|
DEFINE_bool(concurrent_sweeping, false, "enable concurrent sweeping")
|
|
DEFINE_int(sweeper_threads, 0,
|
|
"number of parallel and concurrent sweeping threads")
|
|
#ifdef VERIFY_HEAP
|
|
DEFINE_bool(verify_heap, false, "verify heap pointers before and after GC")
|
|
#endif
|
|
|
|
|
|
// heap-snapshot-generator.cc
|
|
DEFINE_bool(heap_profiler_trace_objects, false,
|
|
"Dump heap object allocations/movements/size_updates")
|
|
|
|
|
|
// v8.cc
|
|
DEFINE_bool(use_idle_notification, true,
|
|
"Use idle notification to reduce memory footprint.")
|
|
// ic.cc
|
|
DEFINE_bool(use_ic, true, "use inline caching")
|
|
|
|
// macro-assembler-ia32.cc
|
|
DEFINE_bool(native_code_counters, false,
|
|
"generate extra code for manipulating stats counters")
|
|
|
|
// mark-compact.cc
|
|
DEFINE_bool(always_compact, false, "Perform compaction on every full GC")
|
|
DEFINE_bool(lazy_sweeping, true,
|
|
"Use lazy sweeping for old pointer and data spaces")
|
|
DEFINE_bool(never_compact, false,
|
|
"Never perform compaction on full GC - testing only")
|
|
DEFINE_bool(compact_code_space, true,
|
|
"Compact code space on full non-incremental collections")
|
|
DEFINE_bool(incremental_code_compaction, true,
|
|
"Compact code space on full incremental collections")
|
|
DEFINE_bool(cleanup_code_caches_at_gc, true,
|
|
"Flush inline caches prior to mark compact collection and "
|
|
"flush code caches in maps during mark compact cycle.")
|
|
DEFINE_bool(use_marking_progress_bar, true,
|
|
"Use a progress bar to scan large objects in increments when "
|
|
"incremental marking is active.")
|
|
DEFINE_int(random_seed, 0,
|
|
"Default seed for initializing random generator "
|
|
"(0, the default, means to use system random).")
|
|
|
|
// objects.cc
|
|
DEFINE_bool(use_verbose_printer, true, "allows verbose printing")
|
|
|
|
// parser.cc
|
|
DEFINE_bool(allow_natives_syntax, false, "allow natives syntax")
|
|
DEFINE_bool(trace_parse, false, "trace parsing and preparsing")
|
|
|
|
// simulator-arm.cc and simulator-mips.cc
|
|
DEFINE_bool(trace_sim, false, "Trace simulator execution")
|
|
DEFINE_bool(check_icache, false,
|
|
"Check icache flushes in ARM and MIPS simulator")
|
|
DEFINE_int(stop_sim_at, 0, "Simulator stop after x number of instructions")
|
|
DEFINE_int(sim_stack_alignment, 8,
|
|
"Stack alingment in bytes in simulator (4 or 8, 8 is default)")
|
|
|
|
// isolate.cc
|
|
DEFINE_bool(abort_on_uncaught_exception, false,
|
|
"abort program (dump core) when an uncaught exception is thrown")
|
|
DEFINE_bool(trace_exception, false,
|
|
"print stack trace when throwing exceptions")
|
|
DEFINE_bool(randomize_hashes, true,
|
|
"randomize hashes to avoid predictable hash collisions "
|
|
"(with snapshots this option cannot override the baked-in seed)")
|
|
DEFINE_int(hash_seed, 0,
|
|
"Fixed seed to use to hash property keys (0 means random)"
|
|
"(with snapshots this option cannot override the baked-in seed)")
|
|
|
|
// snapshot-common.cc
|
|
DEFINE_bool(profile_deserialization, false,
|
|
"Print the time it takes to deserialize the snapshot.")
|
|
|
|
// Regexp
|
|
DEFINE_bool(regexp_optimization, true, "generate optimized regexp code")
|
|
|
|
// Testing flags test/cctest/test-{flags,api,serialization}.cc
|
|
DEFINE_bool(testing_bool_flag, true, "testing_bool_flag")
|
|
DEFINE_maybe_bool(testing_maybe_bool_flag, "testing_maybe_bool_flag")
|
|
DEFINE_int(testing_int_flag, 13, "testing_int_flag")
|
|
DEFINE_float(testing_float_flag, 2.5, "float-flag")
|
|
DEFINE_string(testing_string_flag, "Hello, world!", "string-flag")
|
|
DEFINE_int(testing_prng_seed, 42, "Seed used for threading test randomness")
|
|
#ifdef _WIN32
|
|
DEFINE_string(testing_serialization_file, "C:\\Windows\\Temp\\serdes",
|
|
"file in which to testing_serialize heap")
|
|
#else
|
|
DEFINE_string(testing_serialization_file, "/tmp/serdes",
|
|
"file in which to serialize heap")
|
|
#endif
|
|
|
|
// mksnapshot.cc
|
|
DEFINE_string(extra_code, NULL, "A filename with extra code to be included in"
|
|
" the snapshot (mksnapshot only)")
|
|
|
|
// code-stubs-hydrogen.cc
|
|
DEFINE_bool(profile_hydrogen_code_stub_compilation, false,
|
|
"Print the time it takes to lazily compile hydrogen code stubs.")
|
|
|
|
DEFINE_bool(predictable, false, "enable predictable mode")
|
|
DEFINE_neg_implication(predictable, randomize_hashes)
|
|
DEFINE_neg_implication(predictable, concurrent_recompilation)
|
|
DEFINE_neg_implication(predictable, concurrent_osr)
|
|
DEFINE_neg_implication(predictable, concurrent_sweeping)
|
|
DEFINE_neg_implication(predictable, parallel_sweeping)
|
|
|
|
|
|
//
|
|
// Dev shell flags
|
|
//
|
|
|
|
DEFINE_bool(help, false, "Print usage message, including flags, on console")
|
|
DEFINE_bool(dump_counters, false, "Dump counters on exit")
|
|
|
|
#ifdef ENABLE_DEBUGGER_SUPPORT
|
|
DEFINE_bool(debugger, false, "Enable JavaScript debugger")
|
|
DEFINE_bool(remote_debugger, false, "Connect JavaScript debugger to the "
|
|
"debugger agent in another process")
|
|
DEFINE_bool(debugger_agent, false, "Enable debugger agent")
|
|
DEFINE_int(debugger_port, 5858, "Port to use for remote debugging")
|
|
#endif // ENABLE_DEBUGGER_SUPPORT
|
|
|
|
DEFINE_string(map_counters, "", "Map counters to a file")
|
|
DEFINE_args(js_arguments,
|
|
"Pass all remaining arguments to the script. Alias for \"--\".")
|
|
|
|
#if defined(WEBOS__)
|
|
DEFINE_bool(debug_compile_events, false, "Enable debugger compile events")
|
|
DEFINE_bool(debug_script_collected_events, false,
|
|
"Enable debugger script collected events")
|
|
#else
|
|
DEFINE_bool(debug_compile_events, true, "Enable debugger compile events")
|
|
DEFINE_bool(debug_script_collected_events, true,
|
|
"Enable debugger script collected events")
|
|
#endif
|
|
|
|
|
|
//
|
|
// GDB JIT integration flags.
|
|
//
|
|
|
|
DEFINE_bool(gdbjit, false, "enable GDBJIT interface (disables compacting GC)")
|
|
DEFINE_bool(gdbjit_full, false, "enable GDBJIT interface for all code objects")
|
|
DEFINE_bool(gdbjit_dump, false, "dump elf objects with debug info to disk")
|
|
DEFINE_string(gdbjit_dump_filter, "",
|
|
"dump only objects containing this substring")
|
|
|
|
// mark-compact.cc
|
|
DEFINE_bool(force_marking_deque_overflows, false,
|
|
"force overflows of marking deque by reducing it's size "
|
|
"to 64 words")
|
|
|
|
DEFINE_bool(stress_compaction, false,
|
|
"stress the GC compactor to flush out bugs (implies "
|
|
"--force_marking_deque_overflows)")
|
|
|
|
//
|
|
// Debug only flags
|
|
//
|
|
#undef FLAG
|
|
#ifdef DEBUG
|
|
#define FLAG FLAG_FULL
|
|
#else
|
|
#define FLAG FLAG_READONLY
|
|
#endif
|
|
|
|
// checks.cc
|
|
#ifdef ENABLE_SLOW_ASSERTS
|
|
DEFINE_bool(enable_slow_asserts, false,
|
|
"enable asserts that are slow to execute")
|
|
#endif
|
|
|
|
// codegen-ia32.cc / codegen-arm.cc / macro-assembler-*.cc
|
|
DEFINE_bool(print_source, false, "pretty print source code")
|
|
DEFINE_bool(print_builtin_source, false,
|
|
"pretty print source code for builtins")
|
|
DEFINE_bool(print_ast, false, "print source AST")
|
|
DEFINE_bool(print_builtin_ast, false, "print source AST for builtins")
|
|
DEFINE_string(stop_at, "", "function name where to insert a breakpoint")
|
|
DEFINE_bool(trap_on_abort, false, "replace aborts by breakpoints")
|
|
|
|
// compiler.cc
|
|
DEFINE_bool(print_builtin_scopes, false, "print scopes for builtins")
|
|
DEFINE_bool(print_scopes, false, "print scopes")
|
|
|
|
// contexts.cc
|
|
DEFINE_bool(trace_contexts, false, "trace contexts operations")
|
|
|
|
// heap.cc
|
|
DEFINE_bool(gc_greedy, false, "perform GC prior to some allocations")
|
|
DEFINE_bool(gc_verbose, false, "print stuff during garbage collection")
|
|
DEFINE_bool(heap_stats, false, "report heap statistics before and after GC")
|
|
DEFINE_bool(code_stats, false, "report code statistics after GC")
|
|
DEFINE_bool(verify_native_context_separation, false,
|
|
"verify that code holds on to at most one native context after GC")
|
|
DEFINE_bool(print_handles, false, "report handles after GC")
|
|
DEFINE_bool(print_global_handles, false, "report global handles after GC")
|
|
|
|
// ic.cc
|
|
DEFINE_bool(trace_ic, false, "trace inline cache state transitions")
|
|
|
|
// interface.cc
|
|
DEFINE_bool(print_interfaces, false, "print interfaces")
|
|
DEFINE_bool(print_interface_details, false, "print interface inference details")
|
|
DEFINE_int(print_interface_depth, 5, "depth for printing interfaces")
|
|
|
|
// objects.cc
|
|
DEFINE_bool(trace_normalization, false,
|
|
"prints when objects are turned into dictionaries.")
|
|
|
|
// runtime.cc
|
|
DEFINE_bool(trace_lazy, false, "trace lazy compilation")
|
|
|
|
// spaces.cc
|
|
DEFINE_bool(collect_heap_spill_statistics, false,
|
|
"report heap spill statistics along with heap_stats "
|
|
"(requires heap_stats)")
|
|
|
|
DEFINE_bool(trace_isolates, false, "trace isolate state changes")
|
|
|
|
// Regexp
|
|
DEFINE_bool(regexp_possessive_quantifier, false,
|
|
"enable possessive quantifier syntax for testing")
|
|
DEFINE_bool(trace_regexp_bytecodes, false, "trace regexp bytecode execution")
|
|
DEFINE_bool(trace_regexp_assembler, false,
|
|
"trace regexp macro assembler calls.")
|
|
|
|
//
|
|
// Logging and profiling flags
|
|
//
|
|
#undef FLAG
|
|
#define FLAG FLAG_FULL
|
|
|
|
// log.cc
|
|
DEFINE_bool(log, false,
|
|
"Minimal logging (no API, code, GC, suspect, or handles samples).")
|
|
DEFINE_bool(log_all, false, "Log all events to the log file.")
|
|
DEFINE_bool(log_runtime, false, "Activate runtime system %Log call.")
|
|
DEFINE_bool(log_api, false, "Log API events to the log file.")
|
|
DEFINE_bool(log_code, false,
|
|
"Log code events to the log file without profiling.")
|
|
DEFINE_bool(log_gc, false,
|
|
"Log heap samples on garbage collection for the hp2ps tool.")
|
|
DEFINE_bool(log_handles, false, "Log global handle events.")
|
|
DEFINE_bool(log_snapshot_positions, false,
|
|
"log positions of (de)serialized objects in the snapshot.")
|
|
DEFINE_bool(log_suspect, false, "Log suspect operations.")
|
|
DEFINE_bool(prof, false,
|
|
"Log statistical profiling information (implies --log-code).")
|
|
DEFINE_bool(prof_browser_mode, true,
|
|
"Used with --prof, turns on browser-compatible mode for profiling.")
|
|
DEFINE_bool(log_regexp, false, "Log regular expression execution.")
|
|
DEFINE_string(logfile, "v8.log", "Specify the name of the log file.")
|
|
DEFINE_bool(logfile_per_isolate, true, "Separate log files for each isolate.")
|
|
DEFINE_bool(ll_prof, false, "Enable low-level linux profiler.")
|
|
DEFINE_bool(perf_basic_prof, false,
|
|
"Enable perf linux profiler (basic support).")
|
|
DEFINE_bool(perf_jit_prof, false,
|
|
"Enable perf linux profiler (experimental annotate support).")
|
|
DEFINE_string(gc_fake_mmap, "/tmp/__v8_gc__",
|
|
"Specify the name of the file for fake gc mmap used in ll_prof")
|
|
DEFINE_bool(log_internal_timer_events, false, "Time internal events.")
|
|
DEFINE_bool(log_timer_events, false,
|
|
"Time events including external callbacks.")
|
|
DEFINE_implication(log_timer_events, log_internal_timer_events)
|
|
DEFINE_implication(log_internal_timer_events, prof)
|
|
|
|
DEFINE_bool(redirect_code_traces, false,
|
|
"output deopt information and disassembly into file "
|
|
"code-<pid>-<isolate id>.asm")
|
|
DEFINE_string(redirect_code_traces_to, NULL,
|
|
"output deopt information and disassembly into the given file")
|
|
|
|
//
|
|
// Disassembler only flags
|
|
//
|
|
#undef FLAG
|
|
#ifdef ENABLE_DISASSEMBLER
|
|
#define FLAG FLAG_FULL
|
|
#else
|
|
#define FLAG FLAG_READONLY
|
|
#endif
|
|
|
|
// elements.cc
|
|
DEFINE_bool(trace_elements_transitions, false, "trace elements transitions")
|
|
|
|
DEFINE_bool(trace_creation_allocation_sites, false,
|
|
"trace the creation of allocation sites")
|
|
|
|
// code-stubs.cc
|
|
DEFINE_bool(print_code_stubs, false, "print code stubs")
|
|
DEFINE_bool(test_secondary_stub_cache, false,
|
|
"test secondary stub cache by disabling the primary one")
|
|
|
|
DEFINE_bool(test_primary_stub_cache, false,
|
|
"test primary stub cache by disabling the secondary one")
|
|
|
|
|
|
// codegen-ia32.cc / codegen-arm.cc
|
|
DEFINE_bool(print_code, false, "print generated code")
|
|
DEFINE_bool(print_opt_code, false, "print optimized code")
|
|
DEFINE_bool(print_unopt_code, false, "print unoptimized code before "
|
|
"printing optimized code based on it")
|
|
DEFINE_bool(print_code_verbose, false, "print more information for code")
|
|
DEFINE_bool(print_builtin_code, false, "print generated code for builtins")
|
|
DEFINE_bool(emit_opt_code_positions, false,
|
|
"annotate optimize code with source code positions")
|
|
|
|
#ifdef ENABLE_DISASSEMBLER
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|
DEFINE_bool(sodium, false, "print generated code output suitable for use with "
|
|
"the Sodium code viewer")
|
|
|
|
DEFINE_implication(sodium, print_code_stubs)
|
|
DEFINE_implication(sodium, print_code)
|
|
DEFINE_implication(sodium, print_opt_code)
|
|
DEFINE_implication(sodium, emit_opt_code_positions)
|
|
DEFINE_implication(sodium, code_comments)
|
|
|
|
DEFINE_bool(print_all_code, false, "enable all flags related to printing code")
|
|
DEFINE_implication(print_all_code, print_code)
|
|
DEFINE_implication(print_all_code, print_opt_code)
|
|
DEFINE_implication(print_all_code, print_unopt_code)
|
|
DEFINE_implication(print_all_code, print_code_verbose)
|
|
DEFINE_implication(print_all_code, print_builtin_code)
|
|
DEFINE_implication(print_all_code, print_code_stubs)
|
|
DEFINE_implication(print_all_code, code_comments)
|
|
#ifdef DEBUG
|
|
DEFINE_implication(print_all_code, trace_codegen)
|
|
#endif
|
|
#endif
|
|
|
|
//
|
|
// Read-only flags
|
|
//
|
|
#undef FLAG
|
|
#define FLAG FLAG_READONLY
|
|
|
|
// assembler-arm.h
|
|
DEFINE_bool(enable_ool_constant_pool, false,
|
|
"enable use of out-of-line constant pools (ARM only)")
|
|
|
|
// Cleanup...
|
|
#undef FLAG_FULL
|
|
#undef FLAG_READONLY
|
|
#undef FLAG
|
|
#undef FLAG_ALIAS
|
|
|
|
#undef DEFINE_bool
|
|
#undef DEFINE_maybe_bool
|
|
#undef DEFINE_int
|
|
#undef DEFINE_string
|
|
#undef DEFINE_float
|
|
#undef DEFINE_args
|
|
#undef DEFINE_implication
|
|
#undef DEFINE_neg_implication
|
|
#undef DEFINE_ALIAS_bool
|
|
#undef DEFINE_ALIAS_int
|
|
#undef DEFINE_ALIAS_string
|
|
#undef DEFINE_ALIAS_float
|
|
#undef DEFINE_ALIAS_args
|
|
|
|
#undef FLAG_MODE_DECLARE
|
|
#undef FLAG_MODE_DEFINE
|
|
#undef FLAG_MODE_DEFINE_DEFAULTS
|
|
#undef FLAG_MODE_META
|
|
#undef FLAG_MODE_DEFINE_IMPLICATIONS
|
|
|
|
#undef COMMA
|