| // Copyright 2012 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. |
| |
| // This file defines all of the flags. It is separated into different section, |
| // for Debug, Release, Logging and Profiling, etc. To add a new flag, find the |
| // correct section, and use one of the DEFINE_ macros, without a trailing ';'. |
| // |
| // This include does not have a guard, because it is a template-style include, |
| // which can be included multiple times in different modes. It expects to have |
| // a mode defined before it's included. The modes are FLAG_MODE_... below: |
| |
| // We want to declare the names of the variables for the header file. Normally |
| // this will just be an extern declaration, but for a readonly flag we let the |
| // compiler make better optimizations by giving it the value. |
| #if defined(FLAG_MODE_DECLARE) |
| #define FLAG_FULL(ftype, ctype, nam, def, cmt) \ |
| extern ctype FLAG_##nam; |
| #define FLAG_READONLY(ftype, ctype, nam, def, cmt) \ |
| static ctype const FLAG_##nam = def; |
| |
| // We want to supply the actual storage and value for the flag variable in the |
| // .cc file. We only do this for writable flags. |
| #elif defined(FLAG_MODE_DEFINE) |
| #define FLAG_FULL(ftype, ctype, nam, def, cmt) \ |
| ctype FLAG_##nam = def; |
| |
| // We need to define all of our default values so that the Flag structure can |
| // access them by pointer. These are just used internally inside of one .cc, |
| // for MODE_META, so there is no impact on the flags interface. |
| #elif defined(FLAG_MODE_DEFINE_DEFAULTS) |
| #define FLAG_FULL(ftype, ctype, nam, def, cmt) \ |
| static ctype const FLAGDEFAULT_##nam = def; |
| |
| // We want to write entries into our meta data table, for internal parsing and |
| // printing / etc in the flag parser code. We only do this for writable flags. |
| #elif defined(FLAG_MODE_META) |
| #define FLAG_FULL(ftype, ctype, nam, def, cmt) \ |
| { Flag::TYPE_##ftype, #nam, &FLAG_##nam, &FLAGDEFAULT_##nam, cmt, false }, |
| #define FLAG_ALIAS(ftype, ctype, alias, nam) \ |
| { Flag::TYPE_##ftype, #alias, &FLAG_##nam, &FLAGDEFAULT_##nam, \ |
| "alias for --"#nam, false }, |
| |
| // We produce the code to set flags when it is implied by another flag. |
| #elif defined(FLAG_MODE_DEFINE_IMPLICATIONS) |
| #define DEFINE_implication(whenflag, thenflag) \ |
| if (FLAG_##whenflag) FLAG_##thenflag = true; |
| |
| #else |
| #error No mode supplied when including flags.defs |
| #endif |
| |
| // Dummy defines for modes where it is not relevant. |
| #ifndef FLAG_FULL |
| #define FLAG_FULL(ftype, ctype, nam, def, cmt) |
| #endif |
| |
| #ifndef FLAG_READONLY |
| #define FLAG_READONLY(ftype, ctype, nam, def, cmt) |
| #endif |
| |
| #ifndef FLAG_ALIAS |
| #define FLAG_ALIAS(ftype, ctype, alias, nam) |
| #endif |
| |
| #ifndef DEFINE_implication |
| #define DEFINE_implication(whenflag, thenflag) |
| #endif |
| |
| #define COMMA , |
| |
| #ifdef FLAG_MODE_DECLARE |
| // Structure used to hold a collection of arguments to the JavaScript code. |
| struct JSArguments { |
| public: |
| inline const char*& operator[] (int idx) const { |
| return argv[idx]; |
| } |
| static JSArguments Create(int argc, const char** argv) { |
| JSArguments args; |
| args.argc = argc; |
| args.argv = argv; |
| return args; |
| } |
| int argc; |
| const char** argv; |
| }; |
| |
| struct MaybeBoolFlag { |
| static MaybeBoolFlag Create(bool has_value, bool value) { |
| MaybeBoolFlag flag; |
| flag.has_value = has_value; |
| flag.value = value; |
| return flag; |
| } |
| bool has_value; |
| bool value; |
| }; |
| #endif |
| |
| #if (defined CAN_USE_VFP3_INSTRUCTIONS) || !(defined ARM_TEST) |
| # define ENABLE_VFP3_DEFAULT true |
| #else |
| # define ENABLE_VFP3_DEFAULT false |
| #endif |
| #if (defined CAN_USE_ARMV7_INSTRUCTIONS) || !(defined ARM_TEST) |
| # define ENABLE_ARMV7_DEFAULT true |
| #else |
| # define ENABLE_ARMV7_DEFAULT false |
| #endif |
| #if (defined CAN_USE_VFP32DREGS) || !(defined ARM_TEST) |
| # define ENABLE_32DREGS_DEFAULT true |
| #else |
| # define ENABLE_32DREGS_DEFAULT false |
| #endif |
| |
| #define DEFINE_bool(nam, def, cmt) FLAG(BOOL, bool, nam, def, cmt) |
| #define DEFINE_maybe_bool(nam, cmt) FLAG(MAYBE_BOOL, MaybeBoolFlag, nam, \ |
| { false COMMA false }, cmt) |
| #define DEFINE_int(nam, def, cmt) FLAG(INT, int, nam, def, cmt) |
| #define DEFINE_float(nam, def, cmt) FLAG(FLOAT, double, nam, def, cmt) |
| #define DEFINE_string(nam, def, cmt) FLAG(STRING, const char*, nam, def, cmt) |
| #define DEFINE_args(nam, cmt) FLAG(ARGS, JSArguments, nam, \ |
| { 0 COMMA NULL }, cmt) |
| |
| #define DEFINE_ALIAS_bool(alias, nam) FLAG_ALIAS(BOOL, bool, alias, nam) |
| #define DEFINE_ALIAS_int(alias, nam) FLAG_ALIAS(INT, int, alias, nam) |
| #define DEFINE_ALIAS_float(alias, nam) FLAG_ALIAS(FLOAT, double, alias, nam) |
| #define DEFINE_ALIAS_string(alias, nam) \ |
| FLAG_ALIAS(STRING, const char*, alias, nam) |
| #define DEFINE_ALIAS_args(alias, nam) FLAG_ALIAS(ARGS, JSArguments, alias, nam) |
| |
| // |
| // Flags in all modes. |
| // |
| #define FLAG FLAG_FULL |
| |
| // Flags for language modes and experimental language features. |
| DEFINE_bool(use_strict, false, "enforce strict mode") |
| DEFINE_bool(es5_readonly, true, |
| "activate correct semantics for inheriting readonliness") |
| DEFINE_bool(es52_globals, true, |
| "activate new semantics for global var declarations") |
| |
| DEFINE_bool(harmony_typeof, false, "enable harmony semantics for typeof") |
| DEFINE_bool(harmony_scoping, false, "enable harmony block scoping") |
| DEFINE_bool(harmony_modules, false, |
| "enable harmony modules (implies block scoping)") |
| DEFINE_bool(harmony_symbols, false, |
| "enable harmony symbols (a.k.a. private names)") |
| DEFINE_bool(harmony_proxies, false, "enable harmony proxies") |
| DEFINE_bool(harmony_collections, false, |
| "enable harmony collections (sets, maps, and weak maps)") |
| DEFINE_bool(harmony_observation, false, |
| "enable harmony object observation (implies harmony collections") |
| DEFINE_bool(harmony_typed_arrays, true, |
| "enable harmony typed arrays") |
| DEFINE_bool(harmony_array_buffer, true, |
| "enable harmony array buffer") |
| DEFINE_implication(harmony_typed_arrays, harmony_array_buffer) |
| DEFINE_bool(harmony_generators, false, "enable harmony generators") |
| DEFINE_bool(harmony_iteration, false, "enable harmony iteration (for-of)") |
| DEFINE_bool(harmony_numeric_literals, false, |
| "enable harmony numeric literals (0o77, 0b11)") |
| DEFINE_bool(harmony_strings, false, "enable harmony string") |
| DEFINE_bool(harmony_arrays, false, "enable harmony arrays") |
| DEFINE_bool(harmony, false, "enable all harmony features (except typeof)") |
| DEFINE_implication(harmony, harmony_scoping) |
| DEFINE_implication(harmony, harmony_modules) |
| DEFINE_implication(harmony, harmony_symbols) |
| DEFINE_implication(harmony, harmony_proxies) |
| DEFINE_implication(harmony, harmony_collections) |
| DEFINE_implication(harmony, harmony_observation) |
| DEFINE_implication(harmony, harmony_generators) |
| DEFINE_implication(harmony, harmony_iteration) |
| DEFINE_implication(harmony, harmony_numeric_literals) |
| DEFINE_implication(harmony, harmony_strings) |
| DEFINE_implication(harmony, harmony_arrays) |
| DEFINE_implication(harmony_modules, harmony_scoping) |
| DEFINE_implication(harmony_observation, harmony_collections) |
| // TODO[dslomov] add harmony => harmony_typed_arrays |
| |
| // Flags for experimental implementation features. |
| DEFINE_bool(packed_arrays, true, "optimizes arrays that have no holes") |
| DEFINE_bool(smi_only_arrays, true, "tracks arrays with only smi values") |
| DEFINE_bool(clever_optimizations, |
| true, |
| "Optimize object size, Array shift, DOM strings and string +") |
| DEFINE_bool(pretenuring, true, "allocate objects in old space") |
| // TODO(hpayer): We will remove this flag as soon as we have pretenuring |
| // support for specific allocation sites. |
| DEFINE_bool(pretenuring_call_new, false, "pretenure call new") |
| DEFINE_bool(track_fields, true, "track fields with only smi values") |
| DEFINE_bool(track_double_fields, true, "track fields with double values") |
| DEFINE_bool(track_heap_object_fields, true, "track fields with heap values") |
| DEFINE_bool(track_computed_fields, true, "track computed boilerplate fields") |
| DEFINE_implication(track_double_fields, track_fields) |
| DEFINE_implication(track_heap_object_fields, track_fields) |
| DEFINE_implication(track_computed_fields, track_fields) |
| DEFINE_bool(smi_binop, true, "support smi representation in binary operations") |
| |
| // Flags for data representation optimizations |
| DEFINE_bool(unbox_double_arrays, true, "automatically unbox arrays of doubles") |
| DEFINE_bool(string_slices, true, "use string slices") |
| |
| // Flags for Crankshaft. |
| DEFINE_bool(crankshaft, true, "use crankshaft") |
| DEFINE_string(hydrogen_filter, "*", "optimization filter") |
| DEFINE_bool(use_range, true, "use hydrogen range analysis") |
| DEFINE_bool(use_gvn, true, "use hydrogen global value numbering") |
| DEFINE_bool(use_canonicalizing, true, "use hydrogen instruction canonicalizing") |
| DEFINE_bool(use_inlining, true, "use function inlining") |
| DEFINE_bool(use_escape_analysis, true, "use hydrogen escape analysis") |
| DEFINE_bool(use_allocation_folding, true, "use allocation folding") |
| DEFINE_int(max_inlining_levels, 5, "maximum number of inlining levels") |
| DEFINE_int(max_inlined_source_size, 600, |
| "maximum source size in bytes considered for a single inlining") |
| DEFINE_int(max_inlined_nodes, 196, |
| "maximum number of AST nodes considered for a single inlining") |
| DEFINE_int(max_inlined_nodes_cumulative, 400, |
| "maximum cumulative number of AST nodes considered for inlining") |
| DEFINE_bool(loop_invariant_code_motion, true, "loop invariant code motion") |
| DEFINE_bool(fast_math, true, "faster (but maybe less accurate) math functions") |
| DEFINE_bool(collect_megamorphic_maps_from_stub_cache, |
| true, |
| "crankshaft harvests type feedback from stub cache") |
| DEFINE_bool(hydrogen_stats, false, "print statistics for hydrogen") |
| DEFINE_bool(trace_hydrogen, false, "trace generated hydrogen to file") |
| DEFINE_string(trace_hydrogen_filter, "*", "hydrogen tracing filter") |
| DEFINE_bool(trace_hydrogen_stubs, false, "trace generated hydrogen for stubs") |
| DEFINE_string(trace_hydrogen_file, NULL, "trace hydrogen to given file name") |
| DEFINE_string(trace_phase, "HLZ", "trace generated IR for specified phases") |
| DEFINE_bool(trace_inlining, false, "trace inlining decisions") |
| DEFINE_bool(trace_load_elimination, false, "trace load elimination") |
| DEFINE_bool(trace_alloc, false, "trace register allocator") |
| DEFINE_bool(trace_all_uses, false, "trace all use positions") |
| DEFINE_bool(trace_range, false, "trace range analysis") |
| DEFINE_bool(trace_gvn, false, "trace global value numbering") |
| DEFINE_bool(trace_representation, false, "trace representation types") |
| DEFINE_bool(trace_escape_analysis, false, "trace hydrogen escape analysis") |
| DEFINE_bool(trace_allocation_folding, false, "trace allocation folding") |
| DEFINE_bool(trace_track_allocation_sites, false, |
| "trace the tracking of allocation sites") |
| DEFINE_bool(trace_migration, false, "trace object migration") |
| DEFINE_bool(trace_generalization, false, "trace map generalization") |
| DEFINE_bool(stress_pointer_maps, false, "pointer map for every instruction") |
| DEFINE_bool(stress_environments, false, "environment for every instruction") |
| DEFINE_int(deopt_every_n_times, |
| 0, |
| "deoptimize every n times a deopt point is passed") |
| DEFINE_int(deopt_every_n_garbage_collections, |
| 0, |
| "deoptimize every n garbage collections") |
| DEFINE_bool(print_deopt_stress, false, "print number of possible deopt points") |
| DEFINE_bool(trap_on_deopt, false, "put a break point before deoptimizing") |
| DEFINE_bool(trap_on_stub_deopt, false, |
| "put a break point before deoptimizing a stub") |
| DEFINE_bool(deoptimize_uncommon_cases, true, "deoptimize uncommon cases") |
| DEFINE_bool(polymorphic_inlining, true, "polymorphic inlining") |
| DEFINE_bool(use_osr, true, "use on-stack replacement") |
| DEFINE_bool(array_bounds_checks_elimination, true, |
| "perform array bounds checks elimination") |
| DEFINE_bool(array_bounds_checks_hoisting, false, |
| "perform array bounds checks hoisting") |
| DEFINE_bool(array_index_dehoisting, true, |
| "perform array index dehoisting") |
| DEFINE_bool(analyze_environment_liveness, true, |
| "analyze liveness of environment slots and zap dead values") |
| DEFINE_bool(load_elimination, false, "use load elimination") |
| DEFINE_bool(dead_code_elimination, true, "use dead code elimination") |
| DEFINE_bool(fold_constants, true, "use constant folding") |
| DEFINE_bool(trace_dead_code_elimination, false, "trace dead code elimination") |
| DEFINE_bool(unreachable_code_elimination, false, |
| "eliminate unreachable code (hidden behind soft deopts)") |
| DEFINE_bool(track_allocation_sites, true, |
| "Use allocation site info to reduce transitions") |
| DEFINE_bool(trace_osr, false, "trace on-stack replacement") |
| DEFINE_int(stress_runs, 0, "number of stress runs") |
| DEFINE_bool(optimize_closures, true, "optimize closures") |
| DEFINE_bool(lookup_sample_by_shared, true, |
| "when picking a function to optimize, watch for shared function " |
| "info, not JSFunction itself") |
| DEFINE_bool(cache_optimized_code, true, |
| "cache optimized code for closures") |
| DEFINE_bool(flush_optimized_code_cache, true, |
| "flushes the cache of optimized code for closures on every GC") |
| DEFINE_bool(inline_construct, true, "inline constructor calls") |
| DEFINE_bool(inline_arguments, true, "inline functions with arguments object") |
| DEFINE_bool(inline_accessors, true, "inline JavaScript accessors") |
| DEFINE_int(loop_weight, 1, "loop weight for representation inference") |
| |
| DEFINE_bool(optimize_for_in, true, |
| "optimize functions containing for-in loops") |
| DEFINE_bool(opt_safe_uint32_operations, true, |
| "allow uint32 values on optimize frames if they are used only in " |
| "safe operations") |
| |
| DEFINE_bool(concurrent_recompilation, true, |
| "optimizing hot functions asynchronously on a separate thread") |
| DEFINE_bool(trace_concurrent_recompilation, false, |
| "track concurrent recompilation") |
| DEFINE_int(concurrent_recompilation_queue_length, 8, |
| "the length of the concurrent compilation queue") |
| DEFINE_int(concurrent_recompilation_delay, 0, |
| "artificial compilation delay in ms") |
| DEFINE_bool(concurrent_osr, false, |
| "concurrent on-stack replacement") |
| |
| DEFINE_bool(omit_map_checks_for_leaf_maps, true, |
| "do not emit check maps for constant values that have a leaf map, " |
| "deoptimize the optimized code if the layout of the maps changes.") |
| |
| // Experimental profiler changes. |
| DEFINE_bool(experimental_profiler, true, "enable all profiler experiments") |
| DEFINE_bool(watch_ic_patching, false, "profiler considers IC stability") |
| DEFINE_int(frame_count, 1, "number of stack frames inspected by the profiler") |
| DEFINE_bool(self_optimization, false, |
| "primitive functions trigger their own optimization") |
| DEFINE_bool(direct_self_opt, false, |
| "call recompile stub directly when self-optimizing") |
| DEFINE_bool(retry_self_opt, false, "re-try self-optimization if it failed") |
| DEFINE_bool(interrupt_at_exit, false, |
| "insert an interrupt check at function exit") |
| DEFINE_bool(weighted_back_edges, false, |
| "weight back edges by jump distance for interrupt triggering") |
| // 0x1700 fits in the immediate field of an ARM instruction. |
| DEFINE_int(interrupt_budget, 0x1700, |
| "execution budget before interrupt is triggered") |
| DEFINE_int(type_info_threshold, 25, |
| "percentage of ICs that must have type info to allow optimization") |
| DEFINE_int(self_opt_count, 130, "call count before self-optimization") |
| |
| DEFINE_implication(experimental_profiler, watch_ic_patching) |
| DEFINE_implication(experimental_profiler, self_optimization) |
| // Not implying direct_self_opt here because it seems to be a bad idea. |
| DEFINE_implication(experimental_profiler, retry_self_opt) |
| DEFINE_implication(experimental_profiler, interrupt_at_exit) |
| DEFINE_implication(experimental_profiler, weighted_back_edges) |
| |
| DEFINE_bool(trace_opt_verbose, false, "extra verbose compilation tracing") |
| DEFINE_implication(trace_opt_verbose, trace_opt) |
| |
| // assembler-ia32.cc / assembler-arm.cc / assembler-x64.cc |
| DEFINE_bool(debug_code, false, |
| "generate extra code (assertions) for debugging") |
| DEFINE_bool(code_comments, false, "emit comments in code disassembly") |
| DEFINE_bool(enable_sse2, true, |
| "enable use of SSE2 instructions if available") |
| DEFINE_bool(enable_sse3, true, |
| "enable use of SSE3 instructions if available") |
| DEFINE_bool(enable_sse4_1, true, |
| "enable use of SSE4.1 instructions if available") |
| DEFINE_bool(enable_cmov, true, |
| "enable use of CMOV instruction if available") |
| DEFINE_bool(enable_sahf, true, |
| "enable use of SAHF instruction if available (X64 only)") |
| DEFINE_bool(enable_vfp3, ENABLE_VFP3_DEFAULT, |
| "enable use of VFP3 instructions if available") |
| DEFINE_bool(enable_armv7, ENABLE_ARMV7_DEFAULT, |
| "enable use of ARMv7 instructions if available (ARM only)") |
| DEFINE_bool(enable_neon, true, |
| "enable use of NEON instructions if available (ARM only)") |
| DEFINE_bool(enable_sudiv, true, |
| "enable use of SDIV and UDIV instructions if available (ARM only)") |
| DEFINE_bool(enable_movw_movt, false, |
| "enable loading 32-bit constant by means of movw/movt " |
| "instruction pairs (ARM only)") |
| DEFINE_bool(enable_unaligned_accesses, true, |
| "enable unaligned accesses for ARMv7 (ARM only)") |
| DEFINE_bool(enable_32dregs, ENABLE_32DREGS_DEFAULT, |
| "enable use of d16-d31 registers on ARM - this requires VFP3") |
| DEFINE_bool(enable_vldr_imm, false, |
| "enable use of constant pools for double immediate (ARM only)") |
| |
| // bootstrapper.cc |
| 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_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_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(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(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") |
| DEFINE_bool(parallel_marking, false, "enable parallel marking") |
| DEFINE_int(marking_threads, 0, "number of parallel marking threads") |
| #ifdef VERIFY_HEAP |
| DEFINE_bool(verify_heap, false, "verify heap pointers before and after GC") |
| #endif |
| |
| // 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(preallocate_message_memory, false, |
| "preallocate some memory to build stack traces.") |
| 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)") |
| DEFINE_maybe_bool(force_memory_constrained, |
| "force (if true) or prevent (if false) the runtime from treating " |
| "the device as being memory constrained.") |
| |
| // v8.cc |
| DEFINE_bool(preemption, false, |
| "activate a 100ms timer that switches between V8 threads") |
| |
| // 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)") |
| |
| // |
| // 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 |
| DEFINE_bool(enable_slow_asserts, false, |
| "enable asserts that are slow to execute") |
| |
| // 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_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) |
| |
| // |
| // 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") |
| |
| // 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") |
| |
| #ifdef ENABLE_DISASSEMBLER |
| 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 |
| |
| // 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_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 |
