Line data Source code
1 : // Copyright 2012 the V8 project authors. All rights reserved.
2 : // Use of this source code is governed by a BSD-style license that can be
3 : // found in the LICENSE file.
4 :
5 : // This file defines all of the flags. It is separated into different section,
6 : // for Debug, Release, Logging and Profiling, etc. To add a new flag, find the
7 : // correct section, and use one of the DEFINE_ macros, without a trailing ';'.
8 : //
9 : // This include does not have a guard, because it is a template-style include,
10 : // which can be included multiple times in different modes. It expects to have
11 : // a mode defined before it's included. The modes are FLAG_MODE_... below:
12 :
13 : #define DEFINE_IMPLICATION(whenflag, thenflag) \
14 : DEFINE_VALUE_IMPLICATION(whenflag, thenflag, true)
15 :
16 : #define DEFINE_NEG_IMPLICATION(whenflag, thenflag) \
17 : DEFINE_VALUE_IMPLICATION(whenflag, thenflag, false)
18 :
19 : #define DEFINE_NEG_NEG_IMPLICATION(whenflag, thenflag) \
20 : DEFINE_NEG_VALUE_IMPLICATION(whenflag, thenflag, false)
21 :
22 : #define DEFINE_DUAL_IMPLICATION(whenflag, thenflag) \
23 : DEFINE_IMPLICATION(whenflag, thenflag) \
24 : DEFINE_NEG_NEG_IMPLICATION(whenflag, thenflag)
25 :
26 : // We want to declare the names of the variables for the header file. Normally
27 : // this will just be an extern declaration, but for a readonly flag we let the
28 : // compiler make better optimizations by giving it the value.
29 : #if defined(FLAG_MODE_DECLARE)
30 : #define FLAG_FULL(ftype, ctype, nam, def, cmt) \
31 : V8_EXPORT_PRIVATE extern ctype FLAG_##nam;
32 : #define FLAG_READONLY(ftype, ctype, nam, def, cmt) \
33 : static ctype const FLAG_##nam = def;
34 :
35 : // We want to supply the actual storage and value for the flag variable in the
36 : // .cc file. We only do this for writable flags.
37 : #elif defined(FLAG_MODE_DEFINE)
38 : #ifdef USING_V8_SHARED
39 : #define FLAG_FULL(ftype, ctype, nam, def, cmt) \
40 : V8_EXPORT_PRIVATE extern ctype FLAG_##nam;
41 : #else
42 : #define FLAG_FULL(ftype, ctype, nam, def, cmt) \
43 : V8_EXPORT_PRIVATE ctype FLAG_##nam = def;
44 : #endif
45 :
46 : // We need to define all of our default values so that the Flag structure can
47 : // access them by pointer. These are just used internally inside of one .cc,
48 : // for MODE_META, so there is no impact on the flags interface.
49 : #elif defined(FLAG_MODE_DEFINE_DEFAULTS)
50 : #define FLAG_FULL(ftype, ctype, nam, def, cmt) \
51 : static ctype const FLAGDEFAULT_##nam = def;
52 :
53 : // We want to write entries into our meta data table, for internal parsing and
54 : // printing / etc in the flag parser code. We only do this for writable flags.
55 : #elif defined(FLAG_MODE_META)
56 : #define FLAG_FULL(ftype, ctype, nam, def, cmt) \
57 : { Flag::TYPE_##ftype, #nam, &FLAG_##nam, &FLAGDEFAULT_##nam, cmt, false } \
58 : ,
59 : #define FLAG_ALIAS(ftype, ctype, alias, nam) \
60 : { \
61 : Flag::TYPE_##ftype, #alias, &FLAG_##nam, &FLAGDEFAULT_##nam, \
62 : "alias for --" #nam, false \
63 : } \
64 : ,
65 :
66 : // We produce the code to set flags when it is implied by another flag.
67 : #elif defined(FLAG_MODE_DEFINE_IMPLICATIONS)
68 : #define DEFINE_VALUE_IMPLICATION(whenflag, thenflag, value) \
69 : if (FLAG_##whenflag) FLAG_##thenflag = value;
70 :
71 : #define DEFINE_NEG_VALUE_IMPLICATION(whenflag, thenflag, value) \
72 : if (!FLAG_##whenflag) FLAG_##thenflag = value;
73 :
74 : #else
75 : #error No mode supplied when including flags.defs
76 : #endif
77 :
78 : // Dummy defines for modes where it is not relevant.
79 : #ifndef FLAG_FULL
80 : #define FLAG_FULL(ftype, ctype, nam, def, cmt)
81 : #endif
82 :
83 : #ifndef FLAG_READONLY
84 : #define FLAG_READONLY(ftype, ctype, nam, def, cmt)
85 : #endif
86 :
87 : #ifndef FLAG_ALIAS
88 : #define FLAG_ALIAS(ftype, ctype, alias, nam)
89 : #endif
90 :
91 : #ifndef DEFINE_VALUE_IMPLICATION
92 : #define DEFINE_VALUE_IMPLICATION(whenflag, thenflag, value)
93 : #endif
94 :
95 : #ifndef DEFINE_NEG_VALUE_IMPLICATION
96 : #define DEFINE_NEG_VALUE_IMPLICATION(whenflag, thenflag, value)
97 : #endif
98 :
99 : #define COMMA ,
100 :
101 : #ifdef FLAG_MODE_DECLARE
102 : // Structure used to hold a collection of arguments to the JavaScript code.
103 : struct JSArguments {
104 : public:
105 0 : inline const char*& operator[](int idx) const { return argv[idx]; }
106 : static JSArguments Create(int argc, const char** argv) {
107 : JSArguments args;
108 : args.argc = argc;
109 : args.argv = argv;
110 : return args;
111 : }
112 : int argc;
113 : const char** argv;
114 : };
115 :
116 : struct MaybeBoolFlag {
117 : static MaybeBoolFlag Create(bool has_value, bool value) {
118 : MaybeBoolFlag flag;
119 : flag.has_value = has_value;
120 34 : flag.value = value;
121 : return flag;
122 : }
123 : bool has_value;
124 : bool value;
125 : };
126 : #endif
127 :
128 : #ifdef DEBUG
129 : #define DEBUG_BOOL true
130 : #else
131 : #define DEBUG_BOOL false
132 : #endif
133 :
134 : // Supported ARM configurations are:
135 : // "armv6": ARMv6 + VFPv2
136 : // "armv7": ARMv7 + VFPv3-D32 + NEON
137 : // "armv7+sudiv": ARMv7 + VFPv4-D32 + NEON + SUDIV
138 : // "armv8": ARMv8 (including all of the above)
139 : #if !defined(ARM_TEST_NO_FEATURE_PROBE) || \
140 : (defined(CAN_USE_ARMV8_INSTRUCTIONS) && \
141 : defined(CAN_USE_ARMV7_INSTRUCTIONS) && defined(CAN_USE_SUDIV) && \
142 : defined(CAN_USE_NEON) && defined(CAN_USE_VFP3_INSTRUCTIONS))
143 : #define ARM_ARCH_DEFAULT "armv8"
144 : #elif defined(CAN_USE_ARMV7_INSTRUCTIONS) && defined(CAN_USE_SUDIV) && \
145 : defined(CAN_USE_NEON) && defined(CAN_USE_VFP3_INSTRUCTIONS)
146 : #define ARM_ARCH_DEFAULT "armv7+sudiv"
147 : #elif defined(CAN_USE_ARMV7_INSTRUCTIONS) && defined(CAN_USE_NEON) && \
148 : defined(CAN_USE_VFP3_INSTRUCTIONS)
149 : #define ARM_ARCH_DEFAULT "armv7"
150 : #else
151 : #define ARM_ARCH_DEFAULT "armv6"
152 : #endif
153 :
154 : #ifdef V8_OS_WIN
155 : # define ENABLE_LOG_COLOUR false
156 : #else
157 : # define ENABLE_LOG_COLOUR true
158 : #endif
159 :
160 : #define DEFINE_BOOL(nam, def, cmt) FLAG(BOOL, bool, nam, def, cmt)
161 : #define DEFINE_BOOL_READONLY(nam, def, cmt) \
162 : FLAG_READONLY(BOOL, bool, nam, def, cmt)
163 : #define DEFINE_MAYBE_BOOL(nam, cmt) \
164 : FLAG(MAYBE_BOOL, MaybeBoolFlag, nam, {false COMMA false}, cmt)
165 : #define DEFINE_INT(nam, def, cmt) FLAG(INT, int, nam, def, cmt)
166 : #define DEFINE_UINT(nam, def, cmt) FLAG(UINT, unsigned int, nam, def, cmt)
167 : #define DEFINE_FLOAT(nam, def, cmt) FLAG(FLOAT, double, nam, def, cmt)
168 : #define DEFINE_STRING(nam, def, cmt) FLAG(STRING, const char*, nam, def, cmt)
169 : #define DEFINE_ARGS(nam, cmt) FLAG(ARGS, JSArguments, nam, {0 COMMA NULL}, cmt)
170 :
171 : #define DEFINE_ALIAS_BOOL(alias, nam) FLAG_ALIAS(BOOL, bool, alias, nam)
172 : #define DEFINE_ALIAS_INT(alias, nam) FLAG_ALIAS(INT, int, alias, nam)
173 : #define DEFINE_ALIAS_FLOAT(alias, nam) FLAG_ALIAS(FLOAT, double, alias, nam)
174 : #define DEFINE_ALIAS_STRING(alias, nam) \
175 : FLAG_ALIAS(STRING, const char*, alias, nam)
176 : #define DEFINE_ALIAS_ARGS(alias, nam) FLAG_ALIAS(ARGS, JSArguments, alias, nam)
177 :
178 : //
179 : // Flags in all modes.
180 : //
181 : #define FLAG FLAG_FULL
182 :
183 : DEFINE_BOOL(experimental_extras, false,
184 : "enable code compiled in via v8_experimental_extra_library_files")
185 :
186 : // Flags for language modes and experimental language features.
187 : DEFINE_BOOL(use_strict, false, "enforce strict mode")
188 :
189 : DEFINE_BOOL(es_staging, false,
190 : "enable test-worthy harmony features (for internal use only)")
191 : DEFINE_BOOL(harmony, false, "enable all completed harmony features")
192 : DEFINE_BOOL(harmony_shipping, true, "enable all shipped harmony features")
193 206204 : DEFINE_IMPLICATION(es_staging, harmony)
194 :
195 : // Features that are still work in progress (behind individual flags).
196 : #define HARMONY_INPROGRESS(V) \
197 : V(harmony_array_prototype_values, "harmony Array.prototype.values") \
198 : V(harmony_function_sent, "harmony function.sent") \
199 : V(harmony_tailcalls, "harmony tail calls") \
200 : V(harmony_sharedarraybuffer, "harmony sharedarraybuffer") \
201 : V(harmony_do_expressions, "harmony do-expressions") \
202 : V(harmony_class_fields, "harmony public fields in class literals") \
203 : V(harmony_async_iteration, "harmony async iteration") \
204 : V(harmony_dynamic_import, "harmony dynamic import") \
205 : V(harmony_promise_finally, "harmony Promise.prototype.finally") \
206 : V(harmony_restrict_constructor_return, \
207 : "harmony disallow non undefined primitive return value from class " \
208 : "constructor")
209 :
210 : // Features that are complete (but still behind --harmony/es-staging flag).
211 : #define HARMONY_STAGED(V) \
212 : V(harmony_function_tostring, "harmony Function.prototype.toString") \
213 : V(harmony_regexp_dotall, "harmony regexp dotall flag") \
214 : V(harmony_regexp_lookbehind, "harmony regexp lookbehind") \
215 : V(harmony_regexp_named_captures, "harmony regexp named captures") \
216 : V(harmony_regexp_property, "harmony unicode regexp property classes") \
217 : V(harmony_strict_legacy_accessor_builtins, \
218 : "treat __defineGetter__ and related functions as strict") \
219 : V(harmony_template_escapes, \
220 : "harmony invalid escapes in tagged template literals")
221 :
222 : // Features that are shipping (turned on by default, but internal flag remains).
223 : #define HARMONY_SHIPPING_BASE(V) \
224 : V(harmony_restrictive_generators, \
225 : "harmony restrictions on generator declarations") \
226 : V(harmony_trailing_commas, \
227 : "harmony trailing commas in function parameter lists") \
228 : V(harmony_object_rest_spread, "harmony object rest spread properties")
229 :
230 : #ifdef V8_INTL_SUPPORT
231 : #define HARMONY_SHIPPING(V) \
232 : HARMONY_SHIPPING_BASE(V) \
233 : V(icu_case_mapping, "case mapping with ICU rather than Unibrow")
234 : #else
235 : #define HARMONY_SHIPPING(V) HARMONY_SHIPPING_BASE(V)
236 : #endif
237 :
238 : // Once a shipping feature has proved stable in the wild, it will be dropped
239 : // from HARMONY_SHIPPING, all occurrences of the FLAG_ variable are removed,
240 : // and associated tests are moved from the harmony directory to the appropriate
241 : // esN directory.
242 :
243 :
244 : #define FLAG_INPROGRESS_FEATURES(id, description) \
245 : DEFINE_BOOL(id, false, "enable " #description " (in progress)")
246 : HARMONY_INPROGRESS(FLAG_INPROGRESS_FEATURES)
247 : #undef FLAG_INPROGRESS_FEATURES
248 :
249 : #define FLAG_STAGED_FEATURES(id, description) \
250 : DEFINE_BOOL(id, false, "enable " #description) \
251 : DEFINE_IMPLICATION(harmony, id)
252 206204 : HARMONY_STAGED(FLAG_STAGED_FEATURES)
253 : #undef FLAG_STAGED_FEATURES
254 :
255 : #define FLAG_SHIPPING_FEATURES(id, description) \
256 : DEFINE_BOOL(id, true, "enable " #description) \
257 : DEFINE_NEG_NEG_IMPLICATION(harmony_shipping, id)
258 206204 : HARMONY_SHIPPING(FLAG_SHIPPING_FEATURES)
259 : #undef FLAG_SHIPPING_FEATURES
260 :
261 : #ifdef V8_INTL_SUPPORT
262 : DEFINE_BOOL(icu_timezone_data, false,
263 : "get information about timezones from ICU")
264 : #endif
265 :
266 : #ifdef V8_ENABLE_FUTURE
267 : #define FUTURE_BOOL true
268 : #else
269 : #define FUTURE_BOOL false
270 : #endif
271 : DEFINE_BOOL(future, FUTURE_BOOL,
272 : "Implies all staged features that we want to ship in the "
273 : "not-too-far future")
274 206204 : DEFINE_IMPLICATION(future, turbo)
275 :
276 206204 : DEFINE_DUAL_IMPLICATION(turbo, ignition)
277 206204 : DEFINE_DUAL_IMPLICATION(turbo, thin_strings)
278 :
279 : // Flags for experimental implementation features.
280 : DEFINE_BOOL(allocation_site_pretenuring, true,
281 : "pretenure with allocation sites")
282 : DEFINE_BOOL(mark_shared_functions_for_tier_up, true,
283 : "mark shared functions for tier up")
284 : DEFINE_BOOL(mark_optimizing_shared_functions, true,
285 : "mark shared functions if they are concurrently optimizing")
286 : DEFINE_BOOL(page_promotion, true, "promote pages based on utilization")
287 : DEFINE_INT(page_promotion_threshold, 70,
288 : "min percentage of live bytes on a page to enable fast evacuation")
289 : DEFINE_BOOL(smi_binop, true, "support smi representation in binary operations")
290 : DEFINE_BOOL(trace_pretenuring, false,
291 : "trace pretenuring decisions of HAllocate instructions")
292 : DEFINE_BOOL(trace_pretenuring_statistics, false,
293 : "trace allocation site pretenuring statistics")
294 : DEFINE_BOOL(track_fields, true, "track fields with only smi values")
295 : DEFINE_BOOL(track_double_fields, true, "track fields with double values")
296 : DEFINE_BOOL(track_heap_object_fields, true, "track fields with heap values")
297 : DEFINE_BOOL(track_computed_fields, true, "track computed boilerplate fields")
298 206204 : DEFINE_IMPLICATION(track_double_fields, track_fields)
299 206204 : DEFINE_IMPLICATION(track_heap_object_fields, track_fields)
300 206204 : DEFINE_IMPLICATION(track_computed_fields, track_fields)
301 : DEFINE_BOOL(track_field_types, true, "track field types")
302 206204 : DEFINE_IMPLICATION(track_field_types, track_fields)
303 206204 : DEFINE_IMPLICATION(track_field_types, track_heap_object_fields)
304 : DEFINE_BOOL(type_profile, false, "collect type information")
305 : DEFINE_BOOL(feedback_normalization, false,
306 : "feed back normalization to constructors")
307 : // TODO(jkummerow): This currently adds too much load on the stub cache.
308 : DEFINE_BOOL_READONLY(internalize_on_the_fly, false,
309 : "internalize string keys for generic keyed ICs on the fly")
310 :
311 : // Flags for optimization types.
312 : DEFINE_BOOL(optimize_for_size, false,
313 : "Enables optimizations which favor memory size over execution "
314 : "speed")
315 :
316 206204 : DEFINE_VALUE_IMPLICATION(optimize_for_size, max_semi_space_size, 1)
317 :
318 : // Flags for data representation optimizations
319 : DEFINE_BOOL(unbox_double_arrays, true, "automatically unbox arrays of doubles")
320 : DEFINE_BOOL(string_slices, true, "use string slices")
321 :
322 : // Flags for Ignition.
323 : DEFINE_BOOL(ignition, false, "use ignition interpreter")
324 : DEFINE_BOOL(ignition_osr, true, "enable support for OSR from ignition code")
325 : DEFINE_BOOL(ignition_elide_noneffectful_bytecodes, true,
326 : "elide bytecodes which won't have any external effect")
327 : DEFINE_BOOL(ignition_reo, true, "use ignition register equivalence optimizer")
328 : DEFINE_BOOL(ignition_filter_expression_positions, true,
329 : "filter expression positions before the bytecode pipeline")
330 : DEFINE_BOOL(print_bytecode, false,
331 : "print bytecode generated by ignition interpreter")
332 : DEFINE_STRING(print_bytecode_filter, "*",
333 : "filter for selecting which functions to print bytecode")
334 : DEFINE_BOOL(trace_ignition, false,
335 : "trace the bytecodes executed by the ignition interpreter")
336 : DEFINE_BOOL(trace_ignition_codegen, false,
337 : "trace the codegen of ignition interpreter bytecode handlers")
338 : DEFINE_BOOL(trace_ignition_dispatches, false,
339 : "traces the dispatches to bytecode handlers by the ignition "
340 : "interpreter")
341 : DEFINE_STRING(trace_ignition_dispatches_output_file, nullptr,
342 : "the file to which the bytecode handler dispatch table is "
343 : "written (by default, the table is not written to a file)")
344 :
345 : // Flags for Crankshaft.
346 : DEFINE_BOOL(crankshaft, true, "use crankshaft")
347 : DEFINE_STRING(hydrogen_filter, "*", "optimization filter")
348 : DEFINE_BOOL(use_gvn, true, "use hydrogen global value numbering")
349 : DEFINE_INT(gvn_iterations, 3, "maximum number of GVN fix-point iterations")
350 : DEFINE_BOOL(use_canonicalizing, true, "use hydrogen instruction canonicalizing")
351 : DEFINE_BOOL(use_inlining, true, "use function inlining")
352 : DEFINE_BOOL(use_escape_analysis, true, "use hydrogen escape analysis")
353 : DEFINE_BOOL(use_allocation_folding, true, "use allocation folding")
354 : DEFINE_BOOL(use_local_allocation_folding, false, "only fold in basic blocks")
355 : DEFINE_BOOL(use_write_barrier_elimination, true,
356 : "eliminate write barriers targeting allocations in optimized code")
357 : DEFINE_INT(max_inlining_levels, 5, "maximum number of inlining levels")
358 : DEFINE_INT(max_inlined_source_size, 600,
359 : "maximum source size in bytes considered for a single inlining")
360 : DEFINE_INT(max_inlined_nodes, 200,
361 : "maximum number of AST nodes considered for a single inlining")
362 : DEFINE_INT(max_inlined_nodes_cumulative, 400,
363 : "maximum cumulative number of AST nodes considered for inlining")
364 : DEFINE_BOOL(loop_invariant_code_motion, true, "loop invariant code motion")
365 : DEFINE_BOOL(fast_math, true, "faster (but maybe less accurate) math functions")
366 : DEFINE_BOOL(collect_megamorphic_maps_from_stub_cache, false,
367 : "crankshaft harvests type feedback from stub cache")
368 : DEFINE_BOOL(hydrogen_stats, false, "print statistics for hydrogen")
369 : DEFINE_BOOL(trace_check_elimination, false, "trace check elimination phase")
370 : DEFINE_BOOL(trace_environment_liveness, false,
371 : "trace liveness of local variable slots")
372 : DEFINE_BOOL(trace_hydrogen, false, "trace generated hydrogen to file")
373 : DEFINE_STRING(trace_hydrogen_filter, "*", "hydrogen tracing filter")
374 : DEFINE_BOOL(trace_hydrogen_stubs, false, "trace generated hydrogen for stubs")
375 : DEFINE_STRING(trace_hydrogen_file, NULL, "trace hydrogen to given file name")
376 : DEFINE_STRING(trace_phase, "HLZ", "trace generated IR for specified phases")
377 : DEFINE_BOOL(trace_inlining, false, "trace inlining decisions")
378 : DEFINE_BOOL(trace_load_elimination, false, "trace load elimination")
379 : DEFINE_BOOL(trace_store_elimination, false, "trace store elimination")
380 : DEFINE_BOOL(turbo_verify_store_elimination, false,
381 : "verify store elimination more rigorously")
382 : DEFINE_BOOL(trace_alloc, false, "trace register allocator")
383 : DEFINE_BOOL(trace_all_uses, false, "trace all use positions")
384 : DEFINE_BOOL(trace_range, false, "trace range analysis")
385 : DEFINE_BOOL(trace_gvn, false, "trace global value numbering")
386 : DEFINE_BOOL(trace_representation, false, "trace representation types")
387 : DEFINE_BOOL(trace_removable_simulates, false, "trace removable simulates")
388 : DEFINE_BOOL(trace_escape_analysis, false, "trace hydrogen escape analysis")
389 : DEFINE_BOOL(trace_allocation_folding, false, "trace allocation folding")
390 : DEFINE_BOOL(trace_track_allocation_sites, false,
391 : "trace the tracking of allocation sites")
392 : DEFINE_BOOL(trace_migration, false, "trace object migration")
393 : DEFINE_BOOL(trace_generalization, false, "trace map generalization")
394 : DEFINE_BOOL(stress_pointer_maps, false, "pointer map for every instruction")
395 : DEFINE_BOOL(stress_environments, false, "environment for every instruction")
396 : DEFINE_INT(deopt_every_n_times, 0,
397 : "deoptimize every n times a deopt point is passed")
398 : DEFINE_INT(deopt_every_n_garbage_collections, 0,
399 : "deoptimize every n garbage collections")
400 : DEFINE_BOOL(print_deopt_stress, false, "print number of possible deopt points")
401 : DEFINE_BOOL(trap_on_deopt, false, "put a break point before deoptimizing")
402 : DEFINE_BOOL(trap_on_stub_deopt, false,
403 : "put a break point before deoptimizing a stub")
404 : DEFINE_BOOL(deoptimize_uncommon_cases, true, "deoptimize uncommon cases")
405 : DEFINE_BOOL(polymorphic_inlining, true, "polymorphic inlining")
406 : DEFINE_BOOL(use_osr, true, "use on-stack replacement")
407 : DEFINE_BOOL(array_bounds_checks_elimination, true,
408 : "perform array bounds checks elimination")
409 : DEFINE_BOOL(trace_bce, false, "trace array bounds check elimination")
410 : DEFINE_BOOL(array_index_dehoisting, true, "perform array index dehoisting")
411 : DEFINE_BOOL(analyze_environment_liveness, true,
412 : "analyze liveness of environment slots and zap dead values")
413 : DEFINE_BOOL(load_elimination, true, "use load elimination")
414 : DEFINE_BOOL(check_elimination, true, "use check elimination")
415 : DEFINE_BOOL(store_elimination, false, "use store elimination")
416 : DEFINE_BOOL(dead_code_elimination, true, "use dead code elimination")
417 : DEFINE_BOOL(fold_constants, true, "use constant folding")
418 : DEFINE_BOOL(trace_dead_code_elimination, false, "trace dead code elimination")
419 : DEFINE_BOOL(unreachable_code_elimination, true, "eliminate unreachable code")
420 : DEFINE_BOOL(trace_osr, false, "trace on-stack replacement")
421 : DEFINE_INT(stress_runs, 0, "number of stress runs")
422 : DEFINE_BOOL(lookup_sample_by_shared, true,
423 : "when picking a function to optimize, watch for shared function "
424 : "info, not JSFunction itself")
425 : DEFINE_BOOL(flush_optimized_code_cache, false,
426 : "flushes the cache of optimized code for closures on every GC")
427 : DEFINE_BOOL(inline_construct, true, "inline constructor calls")
428 : DEFINE_BOOL(inline_arguments, true, "inline functions with arguments object")
429 : DEFINE_BOOL(inline_accessors, true, "inline JavaScript accessors")
430 : DEFINE_BOOL(inline_into_try, true, "inline into try blocks")
431 : DEFINE_INT(escape_analysis_iterations, 1,
432 : "maximum number of escape analysis fix-point iterations")
433 :
434 : DEFINE_BOOL(concurrent_recompilation, true,
435 : "optimizing hot functions asynchronously on a separate thread")
436 : DEFINE_BOOL(trace_concurrent_recompilation, false,
437 : "track concurrent recompilation")
438 : DEFINE_INT(concurrent_recompilation_queue_length, 8,
439 : "the length of the concurrent compilation queue")
440 : DEFINE_INT(concurrent_recompilation_delay, 0,
441 : "artificial compilation delay in ms")
442 : DEFINE_BOOL(block_concurrent_recompilation, false,
443 : "block queued jobs until released")
444 :
445 : DEFINE_BOOL(omit_map_checks_for_leaf_maps, true,
446 : "do not emit check maps for constant values that have a leaf map, "
447 : "deoptimize the optimized code if the layout of the maps changes.")
448 :
449 : // Flags for TurboFan.
450 : #ifdef V8_DISABLE_TURBO
451 : // Allow to disable turbofan with a build flag after it's turned on by default.
452 : #define TURBO_BOOL false
453 : #else
454 : #define TURBO_BOOL true
455 : #endif
456 : DEFINE_BOOL(turbo, TURBO_BOOL, "enable TurboFan compiler")
457 : DEFINE_BOOL(turbo_sp_frame_access, false,
458 : "use stack pointer-relative access to frame wherever possible")
459 : DEFINE_BOOL(turbo_preprocess_ranges, true,
460 : "run pre-register allocation heuristics")
461 : DEFINE_STRING(turbo_filter, "~~", "optimization filter for TurboFan compiler")
462 : DEFINE_BOOL(trace_turbo, false, "trace generated TurboFan IR")
463 : DEFINE_BOOL(trace_turbo_graph, false, "trace generated TurboFan graphs")
464 206204 : DEFINE_IMPLICATION(trace_turbo_graph, trace_turbo)
465 : DEFINE_STRING(trace_turbo_cfg_file, NULL,
466 : "trace turbo cfg graph (for C1 visualizer) to a given file name")
467 : DEFINE_BOOL(trace_turbo_types, true, "trace TurboFan's types")
468 : DEFINE_BOOL(trace_turbo_scheduler, false, "trace TurboFan's scheduler")
469 : DEFINE_BOOL(trace_turbo_reduction, false, "trace TurboFan's various reducers")
470 : DEFINE_BOOL(trace_turbo_trimming, false, "trace TurboFan's graph trimmer")
471 : DEFINE_BOOL(trace_turbo_jt, false, "trace TurboFan's jump threading")
472 : DEFINE_BOOL(trace_turbo_ceq, false, "trace TurboFan's control equivalence")
473 : DEFINE_BOOL(trace_turbo_loop, false, "trace TurboFan's loop optimizations")
474 : DEFINE_BOOL(turbo_asm, true, "enable TurboFan for asm.js code")
475 : DEFINE_BOOL(turbo_verify, DEBUG_BOOL, "verify TurboFan graphs at each phase")
476 : DEFINE_STRING(turbo_verify_machine_graph, nullptr,
477 : "verify TurboFan machine graph before instruction selection")
478 : #ifdef ENABLE_VERIFY_CSA
479 : DEFINE_BOOL(verify_csa, DEBUG_BOOL,
480 : "verify TurboFan machine graph of code stubs")
481 : #else
482 : // Define the flag as read-only-false so that code still compiles even in the
483 : // non-ENABLE_VERIFY_CSA configuration.
484 : DEFINE_BOOL_READONLY(verify_csa, false,
485 : "verify TurboFan machine graph of code stubs")
486 : #endif
487 : DEFINE_BOOL(trace_verify_csa, false, "trace code stubs verification")
488 : DEFINE_STRING(csa_trap_on_node, nullptr,
489 : "trigger break point when a node with given id is created in "
490 : "given stub. The format is: StubName,NodeId")
491 : DEFINE_BOOL(turbo_stats, false, "print TurboFan statistics")
492 : DEFINE_BOOL(turbo_stats_nvp, false,
493 : "print TurboFan statistics in machine-readable format")
494 : DEFINE_BOOL(turbo_splitting, true, "split nodes during scheduling in TurboFan")
495 : DEFINE_BOOL(function_context_specialization, false,
496 : "enable function context specialization in TurboFan")
497 : DEFINE_BOOL(turbo_inlining, true, "enable inlining in TurboFan")
498 : DEFINE_BOOL(trace_turbo_inlining, false, "trace TurboFan inlining")
499 : DEFINE_BOOL(turbo_load_elimination, true, "enable load elimination in TurboFan")
500 : DEFINE_BOOL(trace_turbo_load_elimination, false,
501 : "trace TurboFan load elimination")
502 : DEFINE_BOOL(loop_assignment_analysis, true, "perform loop assignment analysis")
503 : DEFINE_BOOL(turbo_profiling, false, "enable profiling in TurboFan")
504 : DEFINE_BOOL(turbo_verify_allocation, DEBUG_BOOL,
505 : "verify register allocation in TurboFan")
506 : DEFINE_BOOL(turbo_move_optimization, true, "optimize gap moves in TurboFan")
507 : DEFINE_BOOL(turbo_jt, true, "enable jump threading in TurboFan")
508 : DEFINE_BOOL(turbo_loop_peeling, true, "Turbofan loop peeling")
509 : DEFINE_BOOL(turbo_loop_variable, true, "Turbofan loop variable optimization")
510 : DEFINE_BOOL(turbo_cf_optimization, true, "optimize control flow in TurboFan")
511 : DEFINE_BOOL(turbo_frame_elision, true, "elide frames in TurboFan")
512 : DEFINE_BOOL(turbo_escape, true, "enable escape analysis")
513 : DEFINE_BOOL(turbo_instruction_scheduling, false,
514 : "enable instruction scheduling in TurboFan")
515 : DEFINE_BOOL(turbo_stress_instruction_scheduling, false,
516 : "randomly schedule instructions to stress dependency tracking")
517 : DEFINE_BOOL(turbo_store_elimination, true,
518 : "enable store-store elimination in TurboFan")
519 : DEFINE_BOOL(turbo_experimental, false,
520 : "enable crashing features, for testing purposes only")
521 :
522 : // Flags to help platform porters
523 : DEFINE_BOOL(minimal, false,
524 : "simplifies execution model to make porting "
525 : "easier (e.g. always use Ignition, never use Crankshaft")
526 206204 : DEFINE_IMPLICATION(minimal, ignition)
527 206204 : DEFINE_NEG_IMPLICATION(minimal, crankshaft)
528 206204 : DEFINE_NEG_IMPLICATION(minimal, use_ic)
529 :
530 : // Flags for native WebAssembly.
531 : DEFINE_BOOL(expose_wasm, true, "expose WASM interface to JavaScript")
532 : DEFINE_BOOL(assume_asmjs_origin, false,
533 : "force wasm decoder to assume input is internal asm-wasm format")
534 : DEFINE_BOOL(wasm_disable_structured_cloning, false,
535 : "disable WASM structured cloning")
536 : DEFINE_INT(wasm_num_compilation_tasks, 10,
537 : "number of parallel compilation tasks for wasm")
538 : DEFINE_BOOL(wasm_async_compilation, true,
539 : "enable actual asynchronous compilation for WebAssembly.compile")
540 : // Parallel compilation confuses turbo_stats, force single threaded.
541 206204 : DEFINE_VALUE_IMPLICATION(turbo_stats, wasm_num_compilation_tasks, 0)
542 : DEFINE_UINT(wasm_max_mem_pages, v8::internal::wasm::kV8MaxWasmMemoryPages,
543 : "maximum memory size of a wasm instance")
544 : DEFINE_UINT(wasm_max_table_size, v8::internal::wasm::kV8MaxWasmTableSize,
545 : "maximum table size of a wasm instance")
546 : DEFINE_BOOL(trace_wasm_encoder, false, "trace encoding of wasm code")
547 : DEFINE_BOOL(trace_wasm_decoder, false, "trace decoding of wasm code")
548 : DEFINE_BOOL(trace_wasm_decode_time, false, "trace decoding time of wasm code")
549 : DEFINE_BOOL(trace_wasm_compiler, false, "trace compiling of wasm code")
550 : DEFINE_BOOL(trace_wasm_interpreter, false, "trace interpretation of wasm code")
551 : DEFINE_INT(trace_wasm_ast_start, 0,
552 : "start function for WASM AST trace (inclusive)")
553 : DEFINE_INT(trace_wasm_ast_end, 0, "end function for WASM AST trace (exclusive)")
554 : DEFINE_UINT(skip_compiling_wasm_funcs, 0, "start compiling at function N")
555 : DEFINE_BOOL(wasm_break_on_decoder_error, false,
556 : "debug break when wasm decoder encounters an error")
557 :
558 : DEFINE_BOOL(validate_asm, false, "validate asm.js modules before compiling")
559 : DEFINE_BOOL(fast_validate_asm, false,
560 : "validate asm.js modules before compiling")
561 : DEFINE_BOOL(suppress_asm_messages, false,
562 : "don't emit asm.js related messages (for golden file testing)")
563 : DEFINE_BOOL(trace_asm_time, false, "log asm.js timing info to the console")
564 : DEFINE_BOOL(trace_asm_scanner, false,
565 : "log tokens encountered by asm.js scanner")
566 : DEFINE_BOOL(trace_asm_parser, false, "verbose logging of asm.js parse failures")
567 : DEFINE_BOOL(stress_validate_asm, false, "try to validate everything as asm.js")
568 :
569 : DEFINE_BOOL(dump_wasm_module, false, "dump WASM module bytes")
570 : DEFINE_STRING(dump_wasm_module_path, NULL, "directory to dump wasm modules to")
571 :
572 : DEFINE_INT(typed_array_max_size_in_heap, 64,
573 : "threshold for in-heap typed array")
574 :
575 : DEFINE_BOOL(wasm_simd_prototype, false,
576 : "enable prototype simd opcodes for wasm")
577 : DEFINE_BOOL(wasm_eh_prototype, false,
578 : "enable prototype exception handling opcodes for wasm")
579 : DEFINE_BOOL(wasm_mv_prototype, false,
580 : "enable prototype multi-value support for wasm")
581 : DEFINE_BOOL(wasm_atomics_prototype, false,
582 : "enable prototype atomic opcodes for wasm")
583 :
584 : DEFINE_BOOL(wasm_opt, true, "enable wasm optimization")
585 : DEFINE_BOOL(wasm_no_bounds_checks, false,
586 : "disable bounds checks (performance testing only)")
587 : DEFINE_BOOL(wasm_no_stack_checks, false,
588 : "disable stack checks (performance testing only)")
589 :
590 : DEFINE_BOOL(wasm_trap_handler, false,
591 : "use signal handlers to catch out of bounds memory access in wasm"
592 : " (experimental, currently Linux x86_64 only)")
593 : DEFINE_BOOL(wasm_guard_pages, false,
594 : "add guard pages to the end of WebWassembly memory"
595 : " (experimental, no effect on 32-bit)")
596 206204 : DEFINE_IMPLICATION(wasm_trap_handler, wasm_guard_pages)
597 : DEFINE_BOOL(wasm_code_fuzzer_gen_test, false,
598 : "Generate a test case when running the wasm-code fuzzer")
599 : DEFINE_BOOL(print_wasm_code, false, "Print WebAssembly code")
600 : DEFINE_BOOL(wasm_interpret_all, false,
601 : "Execute all wasm code in the wasm interpreter")
602 : DEFINE_BOOL(asm_wasm_lazy_compilation, false,
603 : "enable lazy compilation for asm-wasm modules")
604 206204 : DEFINE_IMPLICATION(validate_asm, asm_wasm_lazy_compilation)
605 : DEFINE_BOOL(wasm_lazy_compilation, false,
606 : "enable lazy compilation for all wasm modules")
607 :
608 : // Profiler flags.
609 : DEFINE_INT(frame_count, 1, "number of stack frames inspected by the profiler")
610 : // 0x1800 fits in the immediate field of an ARM instruction.
611 : DEFINE_INT(interrupt_budget, 0x1800,
612 : "execution budget before interrupt is triggered")
613 : DEFINE_INT(type_info_threshold, 25,
614 : "percentage of ICs that must have type info to allow optimization")
615 : DEFINE_INT(generic_ic_threshold, 30,
616 : "max percentage of megamorphic/generic ICs to allow optimization")
617 : DEFINE_INT(self_opt_count, 130, "call count before self-optimization")
618 :
619 : DEFINE_BOOL(trace_opt_verbose, false, "extra verbose compilation tracing")
620 206204 : DEFINE_IMPLICATION(trace_opt_verbose, trace_opt)
621 :
622 : // Garbage collections flags.
623 : DEFINE_INT(min_semi_space_size, 0,
624 : "min size of a semi-space (in MBytes), the new space consists of two"
625 : "semi-spaces")
626 : DEFINE_INT(max_semi_space_size, 0,
627 : "max size of a semi-space (in MBytes), the new space consists of two"
628 : "semi-spaces")
629 : DEFINE_INT(semi_space_growth_factor, 2, "factor by which to grow the new space")
630 : DEFINE_BOOL(experimental_new_space_growth_heuristic, false,
631 : "Grow the new space based on the percentage of survivors instead "
632 : "of their absolute value.")
633 : DEFINE_INT(max_old_space_size, 0, "max size of the old space (in Mbytes)")
634 : DEFINE_INT(initial_old_space_size, 0, "initial old space size (in Mbytes)")
635 : DEFINE_INT(max_executable_size, 0, "max size of executable memory (in Mbytes)")
636 : DEFINE_BOOL(gc_global, false, "always perform global GCs")
637 : DEFINE_INT(gc_interval, -1, "garbage collect after <n> allocations")
638 : DEFINE_INT(retain_maps_for_n_gc, 2,
639 : "keeps maps alive for <n> old space garbage collections")
640 : DEFINE_BOOL(trace_gc, false,
641 : "print one trace line following each garbage collection")
642 : DEFINE_BOOL(trace_gc_nvp, false,
643 : "print one detailed trace line in name=value format "
644 : "after each garbage collection")
645 : DEFINE_BOOL(trace_gc_ignore_scavenger, false,
646 : "do not print trace line after scavenger collection")
647 : DEFINE_BOOL(trace_idle_notification, false,
648 : "print one trace line following each idle notification")
649 : DEFINE_BOOL(trace_idle_notification_verbose, false,
650 : "prints the heap state used by the idle notification")
651 : DEFINE_BOOL(trace_gc_verbose, false,
652 : "print more details following each garbage collection")
653 : DEFINE_INT(trace_allocation_stack_interval, -1,
654 : "print stack trace after <n> free-list allocations")
655 : DEFINE_BOOL(trace_fragmentation, false, "report fragmentation for old space")
656 : DEFINE_BOOL(trace_fragmentation_verbose, false,
657 : "report fragmentation for old space (detailed)")
658 : DEFINE_BOOL(trace_evacuation, false, "report evacuation statistics")
659 : DEFINE_BOOL(trace_mutator_utilization, false,
660 : "print mutator utilization, allocation speed, gc speed")
661 : DEFINE_BOOL(flush_code, true, "flush code that we expect not to use again")
662 : DEFINE_BOOL(trace_code_flushing, false, "trace code flushing progress")
663 : DEFINE_BOOL(age_code, true,
664 : "track un-executed functions to age code and flush only "
665 : "old code (required for code flushing)")
666 : DEFINE_BOOL(incremental_marking, true, "use incremental marking")
667 : DEFINE_BOOL(incremental_marking_wrappers, true,
668 : "use incremental marking for marking wrappers")
669 : DEFINE_BOOL(concurrent_marking, false, "use concurrent marking")
670 : DEFINE_BOOL(trace_concurrent_marking, false, "trace concurrent marking")
671 : DEFINE_INT(min_progress_during_incremental_marking_finalization, 32,
672 : "keep finalizing incremental marking as long as we discover at "
673 : "least this many unmarked objects")
674 : DEFINE_INT(max_incremental_marking_finalization_rounds, 3,
675 : "at most try this many times to finalize incremental marking")
676 : DEFINE_BOOL(minor_mc, false, "perform young generation mark compact GCs")
677 206204 : DEFINE_NEG_IMPLICATION(minor_mc, page_promotion)
678 206204 : DEFINE_NEG_IMPLICATION(minor_mc, flush_code)
679 : DEFINE_BOOL(black_allocation, true, "use black allocation")
680 : DEFINE_BOOL(concurrent_store_buffer, true,
681 : "use concurrent store buffer processing")
682 : DEFINE_BOOL(concurrent_sweeping, true, "use concurrent sweeping")
683 : DEFINE_BOOL(parallel_compaction, true, "use parallel compaction")
684 : DEFINE_BOOL(parallel_pointer_update, true,
685 : "use parallel pointer update during compaction")
686 : DEFINE_BOOL(trace_incremental_marking, false,
687 : "trace progress of the incremental marking")
688 : DEFINE_BOOL(track_gc_object_stats, false,
689 : "track object counts and memory usage")
690 : DEFINE_BOOL(trace_gc_object_stats, false,
691 : "trace object counts and memory usage")
692 : DEFINE_INT(gc_stats, 0, "Used by tracing internally to enable gc statistics")
693 206204 : DEFINE_IMPLICATION(trace_gc_object_stats, track_gc_object_stats)
694 206204 : DEFINE_VALUE_IMPLICATION(track_gc_object_stats, gc_stats, 1)
695 206204 : DEFINE_VALUE_IMPLICATION(trace_gc_object_stats, gc_stats, 1)
696 206204 : DEFINE_NEG_IMPLICATION(trace_gc_object_stats, incremental_marking)
697 : DEFINE_BOOL(track_detached_contexts, true,
698 : "track native contexts that are expected to be garbage collected")
699 : DEFINE_BOOL(trace_detached_contexts, false,
700 : "trace native contexts that are expected to be garbage collected")
701 206204 : DEFINE_IMPLICATION(trace_detached_contexts, track_detached_contexts)
702 : #ifdef VERIFY_HEAP
703 : DEFINE_BOOL(verify_heap, false, "verify heap pointers before and after GC")
704 : #endif
705 : DEFINE_BOOL(move_object_start, true, "enable moving of object starts")
706 : DEFINE_BOOL(memory_reducer, true, "use memory reducer")
707 : DEFINE_INT(heap_growing_percent, 0,
708 : "specifies heap growing factor as (1 + heap_growing_percent/100)")
709 : DEFINE_INT(v8_os_page_size, 0, "override OS page size (in KBytes)")
710 : DEFINE_BOOL(always_compact, false, "Perform compaction on every full GC")
711 : DEFINE_BOOL(never_compact, false,
712 : "Never perform compaction on full GC - testing only")
713 : DEFINE_BOOL(compact_code_space, true, "Compact code space on full collections")
714 : DEFINE_BOOL(cleanup_code_caches_at_gc, true,
715 : "Flush code caches in maps during mark compact cycle.")
716 : DEFINE_BOOL(use_marking_progress_bar, true,
717 : "Use a progress bar to scan large objects in increments when "
718 : "incremental marking is active.")
719 : DEFINE_BOOL(zap_code_space, DEBUG_BOOL,
720 : "Zap free memory in code space with 0xCC while sweeping.")
721 : DEFINE_BOOL(force_marking_deque_overflows, false,
722 : "force overflows of marking deque by reducing it's size "
723 : "to 64 words")
724 : DEFINE_BOOL(stress_compaction, false,
725 : "stress the GC compactor to flush out bugs (implies "
726 : "--force_marking_deque_overflows)")
727 : DEFINE_BOOL(manual_evacuation_candidates_selection, false,
728 : "Test mode only flag. It allows an unit test to select evacuation "
729 : "candidates pages (requires --stress_compaction).")
730 : DEFINE_BOOL(fast_promotion_new_space, false,
731 : "fast promote new space on high survival rates")
732 :
733 : // assembler-ia32.cc / assembler-arm.cc / assembler-x64.cc
734 : DEFINE_BOOL(debug_code, DEBUG_BOOL,
735 : "generate extra code (assertions) for debugging")
736 : DEFINE_BOOL(code_comments, false, "emit comments in code disassembly")
737 : DEFINE_BOOL(enable_sse3, true, "enable use of SSE3 instructions if available")
738 : DEFINE_BOOL(enable_ssse3, true, "enable use of SSSE3 instructions if available")
739 : DEFINE_BOOL(enable_sse4_1, true,
740 : "enable use of SSE4.1 instructions if available")
741 : DEFINE_BOOL(enable_sahf, true,
742 : "enable use of SAHF instruction if available (X64 only)")
743 : DEFINE_BOOL(enable_avx, true, "enable use of AVX instructions if available")
744 : DEFINE_BOOL(enable_fma3, true, "enable use of FMA3 instructions if available")
745 : DEFINE_BOOL(enable_bmi1, true, "enable use of BMI1 instructions if available")
746 : DEFINE_BOOL(enable_bmi2, true, "enable use of BMI2 instructions if available")
747 : DEFINE_BOOL(enable_lzcnt, true, "enable use of LZCNT instruction if available")
748 : DEFINE_BOOL(enable_popcnt, true,
749 : "enable use of POPCNT instruction if available")
750 : DEFINE_STRING(arm_arch, ARM_ARCH_DEFAULT,
751 : "generate instructions for the selected ARM architecture if "
752 : "available: armv6, armv7, armv7+sudiv or armv8")
753 : DEFINE_BOOL(enable_vldr_imm, false,
754 : "enable use of constant pools for double immediate (ARM only)")
755 : DEFINE_BOOL(force_long_branches, false,
756 : "force all emitted branches to be in long mode (MIPS/PPC only)")
757 : DEFINE_STRING(mcpu, "auto", "enable optimization for specific cpu")
758 :
759 : // Deprecated ARM flags (replaced by arm_arch).
760 : DEFINE_MAYBE_BOOL(enable_armv7, "deprecated (use --arm_arch instead)")
761 : DEFINE_MAYBE_BOOL(enable_vfp3, "deprecated (use --arm_arch instead)")
762 : DEFINE_MAYBE_BOOL(enable_32dregs, "deprecated (use --arm_arch instead)")
763 : DEFINE_MAYBE_BOOL(enable_neon, "deprecated (use --arm_arch instead)")
764 : DEFINE_MAYBE_BOOL(enable_sudiv, "deprecated (use --arm_arch instead)")
765 : DEFINE_MAYBE_BOOL(enable_armv8, "deprecated (use --arm_arch instead)")
766 :
767 : // regexp-macro-assembler-*.cc
768 : DEFINE_BOOL(enable_regexp_unaligned_accesses, true,
769 : "enable unaligned accesses for the regexp engine")
770 :
771 : // api.cc
772 : DEFINE_BOOL(script_streaming, true, "enable parsing on background")
773 : DEFINE_BOOL(disable_old_api_accessors, false,
774 : "Disable old-style API accessors whose setters trigger through the "
775 : "prototype chain")
776 :
777 : // bootstrapper.cc
778 : DEFINE_STRING(expose_natives_as, NULL, "expose natives in global object")
779 : DEFINE_BOOL(expose_free_buffer, false, "expose freeBuffer extension")
780 : DEFINE_BOOL(expose_gc, false, "expose gc extension")
781 : DEFINE_STRING(expose_gc_as, NULL,
782 : "expose gc extension under the specified name")
783 206204 : DEFINE_IMPLICATION(expose_gc_as, expose_gc)
784 : DEFINE_BOOL(expose_externalize_string, false,
785 : "expose externalize string extension")
786 : DEFINE_BOOL(expose_trigger_failure, false, "expose trigger-failure extension")
787 : DEFINE_INT(stack_trace_limit, 10, "number of stack frames to capture")
788 : DEFINE_BOOL(builtins_in_stack_traces, false,
789 : "show built-in functions in stack traces")
790 :
791 : // builtins.cc
792 : DEFINE_BOOL(experimental_fast_array_builtins, false,
793 : "use experimental array builtins")
794 : DEFINE_BOOL(allow_unsafe_function_constructor, false,
795 : "allow invoking the function constructor without security checks")
796 :
797 : // builtins-ia32.cc
798 : DEFINE_BOOL(inline_new, true, "use fast inline allocation")
799 :
800 : // codegen-ia32.cc / codegen-arm.cc
801 : DEFINE_BOOL(trace_codegen, false,
802 : "print name of functions for which code is generated")
803 : DEFINE_BOOL(trace, false, "trace function calls")
804 : DEFINE_BOOL(mask_constants_with_cookie, true,
805 : "use random jit cookie to mask large constants")
806 :
807 : // codegen.cc
808 : DEFINE_BOOL(lazy, true, "use lazy compilation")
809 : DEFINE_BOOL(trace_opt, false, "trace lazy optimization")
810 : DEFINE_BOOL(trace_opt_stats, false, "trace lazy optimization statistics")
811 : DEFINE_BOOL(trace_file_names, false,
812 : "include file names in trace-opt/trace-deopt output")
813 : DEFINE_BOOL(opt, true, "use adaptive optimizations")
814 : DEFINE_BOOL(always_opt, false, "always try to optimize functions")
815 : DEFINE_BOOL(always_osr, false, "always try to OSR functions")
816 : DEFINE_BOOL(prepare_always_opt, false, "prepare for turning on always opt")
817 : DEFINE_BOOL(trace_deopt, false, "trace optimize function deoptimization")
818 : DEFINE_BOOL(trace_stub_failures, false,
819 : "trace deoptimization of generated code stubs")
820 :
821 : DEFINE_BOOL(serialize_toplevel, true, "enable caching of toplevel scripts")
822 : DEFINE_BOOL(serialize_eager, false, "compile eagerly when caching scripts")
823 : DEFINE_BOOL(serialize_age_code, false, "pre age code in the code cache")
824 : DEFINE_BOOL(trace_serializer, false, "print code serializer trace")
825 : #ifdef DEBUG
826 : DEFINE_BOOL(external_reference_stats, false,
827 : "print statistics on external references used during serialization")
828 : #endif // DEBUG
829 :
830 : // compiler.cc
831 : DEFINE_INT(max_deopt_count, 10,
832 : "maximum number of deoptimizations before giving up optimization of "
833 : "a function.")
834 :
835 : // compilation-cache.cc
836 : DEFINE_BOOL(compilation_cache, true, "enable compilation cache")
837 :
838 : DEFINE_BOOL(cache_prototype_transitions, true, "cache prototype transitions")
839 :
840 : // compiler-dispatcher.cc
841 : DEFINE_BOOL(compiler_dispatcher, false, "enable compiler dispatcher")
842 : DEFINE_BOOL(compiler_dispatcher_eager_inner, false,
843 : "enable background compilation of eager inner functions")
844 : DEFINE_BOOL(trace_compiler_dispatcher, false,
845 : "trace compiler dispatcher activity")
846 :
847 : // compiler-dispatcher-job.cc
848 : DEFINE_BOOL(
849 : trace_compiler_dispatcher_jobs, false,
850 : "trace progress of individual jobs managed by the compiler dispatcher")
851 :
852 : // cpu-profiler.cc
853 : DEFINE_INT(cpu_profiler_sampling_interval, 1000,
854 : "CPU profiler sampling interval in microseconds")
855 :
856 : // Array abuse tracing
857 : DEFINE_BOOL(trace_js_array_abuse, false,
858 : "trace out-of-bounds accesses to JS arrays")
859 : DEFINE_BOOL(trace_external_array_abuse, false,
860 : "trace out-of-bounds-accesses to external arrays")
861 : DEFINE_BOOL(trace_array_abuse, false,
862 : "trace out-of-bounds accesses to all arrays")
863 206204 : DEFINE_IMPLICATION(trace_array_abuse, trace_js_array_abuse)
864 206204 : DEFINE_IMPLICATION(trace_array_abuse, trace_external_array_abuse)
865 :
866 : // debugger
867 : DEFINE_BOOL(enable_liveedit, true, "enable liveedit experimental feature")
868 : DEFINE_BOOL(
869 : trace_side_effect_free_debug_evaluate, false,
870 : "print debug messages for side-effect-free debug-evaluate for testing")
871 : DEFINE_BOOL(hard_abort, true, "abort by crashing")
872 :
873 : // inspector
874 : DEFINE_BOOL(expose_inspector_scripts, false,
875 : "expose injected-script-source.js for debugging")
876 :
877 : // execution.cc
878 : DEFINE_INT(stack_size, V8_DEFAULT_STACK_SIZE_KB,
879 : "default size of stack region v8 is allowed to use (in kBytes)")
880 :
881 : // frames.cc
882 : DEFINE_INT(max_stack_trace_source_length, 300,
883 : "maximum length of function source code printed in a stack trace.")
884 :
885 : // full-codegen.cc
886 : DEFINE_BOOL(always_inline_smi_code, false,
887 : "always inline smi code in non-opt code")
888 : DEFINE_BOOL(verify_operand_stack_depth, false,
889 : "emit debug code that verifies the static tracking of the operand "
890 : "stack depth")
891 :
892 : // execution.cc, messages.cc
893 : DEFINE_BOOL(clear_exceptions_on_js_entry, false,
894 : "clear pending exceptions when entering JavaScript")
895 :
896 : // counters.cc
897 : DEFINE_INT(histogram_interval, 600000,
898 : "time interval in ms for aggregating memory histograms")
899 :
900 : // heap-snapshot-generator.cc
901 : DEFINE_BOOL(heap_profiler_trace_objects, false,
902 : "Dump heap object allocations/movements/size_updates")
903 :
904 :
905 : // sampling-heap-profiler.cc
906 : DEFINE_BOOL(sampling_heap_profiler_suppress_randomness, false,
907 : "Use constant sample intervals to eliminate test flakiness")
908 :
909 :
910 : // v8.cc
911 : DEFINE_BOOL(use_idle_notification, true,
912 : "Use idle notification to reduce memory footprint.")
913 : // ic.cc
914 : DEFINE_BOOL(use_ic, true, "use inline caching")
915 : DEFINE_BOOL(trace_ic, false, "trace inline cache state transitions")
916 206204 : DEFINE_IMPLICATION(trace_ic, log_code)
917 : DEFINE_INT(ic_stats, 0, "inline cache state transitions statistics")
918 206204 : DEFINE_VALUE_IMPLICATION(trace_ic, ic_stats, 1)
919 : DEFINE_BOOL_READONLY(track_constant_fields, false,
920 : "enable constant field tracking")
921 : DEFINE_BOOL_READONLY(modify_map_inplace, false, "enable in-place map updates")
922 :
923 : // macro-assembler-ia32.cc
924 : DEFINE_BOOL(native_code_counters, false,
925 : "generate extra code for manipulating stats counters")
926 :
927 : // objects.cc
928 : DEFINE_BOOL(thin_strings, false, "Enable ThinString support")
929 : DEFINE_BOOL(trace_weak_arrays, false, "Trace WeakFixedArray usage")
930 : DEFINE_BOOL(trace_prototype_users, false,
931 : "Trace updates to prototype user tracking")
932 : DEFINE_BOOL(use_verbose_printer, true, "allows verbose printing")
933 : DEFINE_BOOL(trace_for_in_enumerate, false, "Trace for-in enumerate slow-paths")
934 : #if TRACE_MAPS
935 : DEFINE_BOOL(trace_maps, false, "trace map creation")
936 : #endif
937 :
938 : // preparser.cc
939 : DEFINE_BOOL(use_parse_tasks, false, "use parse tasks")
940 : DEFINE_BOOL(trace_parse_tasks, false, "trace parse task creation")
941 :
942 : // parser.cc
943 : DEFINE_BOOL(allow_natives_syntax, false, "allow natives syntax")
944 : DEFINE_BOOL(trace_parse, false, "trace parsing and preparsing")
945 : DEFINE_BOOL(trace_preparse, false, "trace preparsing decisions")
946 : DEFINE_BOOL(lazy_inner_functions, true, "enable lazy parsing inner functions")
947 : DEFINE_BOOL(aggressive_lazy_inner_functions, false,
948 : "even lazier inner function parsing")
949 206204 : DEFINE_IMPLICATION(aggressive_lazy_inner_functions, lazy_inner_functions)
950 : DEFINE_BOOL(experimental_preparser_scope_analysis, false,
951 : "perform scope analysis for preparsed inner functions")
952 206204 : DEFINE_IMPLICATION(experimental_preparser_scope_analysis, lazy_inner_functions)
953 :
954 : // simulator-arm.cc, simulator-arm64.cc and simulator-mips.cc
955 : DEFINE_BOOL(trace_sim, false, "Trace simulator execution")
956 : DEFINE_BOOL(debug_sim, false, "Enable debugging the simulator")
957 : DEFINE_BOOL(check_icache, false,
958 : "Check icache flushes in ARM and MIPS simulator")
959 : DEFINE_INT(stop_sim_at, 0, "Simulator stop after x number of instructions")
960 : #if defined(V8_TARGET_ARCH_ARM64) || defined(V8_TARGET_ARCH_MIPS64) || \
961 : defined(V8_TARGET_ARCH_PPC64)
962 : DEFINE_INT(sim_stack_alignment, 16,
963 : "Stack alignment in bytes in simulator. This must be a power of two "
964 : "and it must be at least 16. 16 is default.")
965 : #else
966 : DEFINE_INT(sim_stack_alignment, 8,
967 : "Stack alingment in bytes in simulator (4 or 8, 8 is default)")
968 : #endif
969 : DEFINE_INT(sim_stack_size, 2 * MB / KB,
970 : "Stack size of the ARM64, MIPS64 and PPC64 simulator "
971 : "in kBytes (default is 2 MB)")
972 : DEFINE_BOOL(log_regs_modified, true,
973 : "When logging register values, only print modified registers.")
974 : DEFINE_BOOL(log_colour, ENABLE_LOG_COLOUR,
975 : "When logging, try to use coloured output.")
976 : DEFINE_BOOL(ignore_asm_unimplemented_break, false,
977 : "Don't break for ASM_UNIMPLEMENTED_BREAK macros.")
978 : DEFINE_BOOL(trace_sim_messages, false,
979 : "Trace simulator debug messages. Implied by --trace-sim.")
980 :
981 : // isolate.cc
982 : DEFINE_BOOL(stack_trace_on_illegal, false,
983 : "print stack trace when an illegal exception is thrown")
984 : DEFINE_BOOL(abort_on_uncaught_exception, false,
985 : "abort program (dump core) when an uncaught exception is thrown")
986 : DEFINE_BOOL(abort_on_stack_overflow, false,
987 : "Abort program when stack overflow (as opposed to throwing "
988 : "RangeError). This is useful for fuzzing where the spec behaviour "
989 : "would introduce nondeterminism.")
990 : DEFINE_BOOL(randomize_hashes, true,
991 : "randomize hashes to avoid predictable hash collisions "
992 : "(with snapshots this option cannot override the baked-in seed)")
993 : DEFINE_INT(hash_seed, 0,
994 : "Fixed seed to use to hash property keys (0 means random)"
995 : "(with snapshots this option cannot override the baked-in seed)")
996 : DEFINE_INT(random_seed, 0,
997 : "Default seed for initializing random generator "
998 : "(0, the default, means to use system random).")
999 : DEFINE_BOOL(trace_rail, false, "trace RAIL mode")
1000 : DEFINE_BOOL(print_all_exceptions, false,
1001 : "print exception object and stack trace on each thrown exception")
1002 :
1003 : // runtime.cc
1004 : DEFINE_BOOL(runtime_call_stats, false, "report runtime call counts and times")
1005 : DEFINE_INT(runtime_stats, 0,
1006 : "internal usage only for controlling runtime statistics")
1007 206204 : DEFINE_VALUE_IMPLICATION(runtime_call_stats, runtime_stats, 1)
1008 :
1009 : // snapshot-common.cc
1010 : DEFINE_BOOL(profile_deserialization, false,
1011 : "Print the time it takes to deserialize the snapshot.")
1012 : DEFINE_BOOL(serialization_statistics, false,
1013 : "Collect statistics on serialized objects.")
1014 :
1015 : // Regexp
1016 : DEFINE_BOOL(regexp_optimization, true, "generate optimized regexp code")
1017 :
1018 : // Testing flags test/cctest/test-{flags,api,serialization}.cc
1019 : DEFINE_BOOL(testing_bool_flag, true, "testing_bool_flag")
1020 : DEFINE_MAYBE_BOOL(testing_maybe_bool_flag, "testing_maybe_bool_flag")
1021 : DEFINE_INT(testing_int_flag, 13, "testing_int_flag")
1022 : DEFINE_FLOAT(testing_float_flag, 2.5, "float-flag")
1023 : DEFINE_STRING(testing_string_flag, "Hello, world!", "string-flag")
1024 : DEFINE_INT(testing_prng_seed, 42, "Seed used for threading test randomness")
1025 :
1026 : // mksnapshot.cc
1027 : DEFINE_STRING(startup_src, NULL,
1028 : "Write V8 startup as C++ src. (mksnapshot only)")
1029 : DEFINE_STRING(startup_blob, NULL,
1030 : "Write V8 startup blob file. (mksnapshot only)")
1031 :
1032 : // code-stubs-hydrogen.cc
1033 : DEFINE_BOOL(profile_hydrogen_code_stub_compilation, false,
1034 : "Print the time it takes to lazily compile hydrogen code stubs.")
1035 :
1036 : //
1037 : // Dev shell flags
1038 : //
1039 :
1040 : DEFINE_BOOL(help, false, "Print usage message, including flags, on console")
1041 : DEFINE_BOOL(dump_counters, false, "Dump counters on exit")
1042 : DEFINE_BOOL(dump_counters_nvp, false,
1043 : "Dump counters as name-value pairs on exit")
1044 : DEFINE_BOOL(use_external_strings, false, "Use external strings for source code")
1045 :
1046 : DEFINE_STRING(map_counters, "", "Map counters to a file")
1047 : DEFINE_ARGS(js_arguments,
1048 : "Pass all remaining arguments to the script. Alias for \"--\".")
1049 :
1050 : //
1051 : // GDB JIT integration flags.
1052 : //
1053 : #undef FLAG
1054 : #ifdef ENABLE_GDB_JIT_INTERFACE
1055 : #define FLAG FLAG_FULL
1056 : #else
1057 : #define FLAG FLAG_READONLY
1058 : #endif
1059 :
1060 : DEFINE_BOOL(gdbjit, false, "enable GDBJIT interface")
1061 : DEFINE_BOOL(gdbjit_full, false, "enable GDBJIT interface for all code objects")
1062 : DEFINE_BOOL(gdbjit_dump, false, "dump elf objects with debug info to disk")
1063 : DEFINE_STRING(gdbjit_dump_filter, "",
1064 : "dump only objects containing this substring")
1065 :
1066 : #ifdef ENABLE_GDB_JIT_INTERFACE
1067 206204 : DEFINE_IMPLICATION(gdbjit_full, gdbjit)
1068 206204 : DEFINE_IMPLICATION(gdbjit_dump, gdbjit)
1069 : #endif
1070 206204 : DEFINE_NEG_IMPLICATION(gdbjit, compact_code_space)
1071 :
1072 : //
1073 : // Debug only flags
1074 : //
1075 : #undef FLAG
1076 : #ifdef DEBUG
1077 : #define FLAG FLAG_FULL
1078 : #else
1079 : #define FLAG FLAG_READONLY
1080 : #endif
1081 :
1082 : // checks.cc
1083 : #ifdef ENABLE_SLOW_DCHECKS
1084 : DEFINE_BOOL(enable_slow_asserts, false,
1085 : "enable asserts that are slow to execute")
1086 : #endif
1087 :
1088 : // codegen-ia32.cc / codegen-arm.cc / macro-assembler-*.cc
1089 : DEFINE_BOOL(print_ast, false, "print source AST")
1090 : DEFINE_BOOL(print_builtin_ast, false, "print source AST for builtins")
1091 : DEFINE_BOOL(trap_on_abort, false, "replace aborts by breakpoints")
1092 :
1093 : // compiler.cc
1094 : DEFINE_BOOL(print_builtin_scopes, false, "print scopes for builtins")
1095 : DEFINE_BOOL(print_scopes, false, "print scopes")
1096 :
1097 : // contexts.cc
1098 : DEFINE_BOOL(trace_contexts, false, "trace contexts operations")
1099 :
1100 : // heap.cc
1101 : DEFINE_BOOL(gc_verbose, false, "print stuff during garbage collection")
1102 : DEFINE_BOOL(heap_stats, false, "report heap statistics before and after GC")
1103 : DEFINE_BOOL(code_stats, false, "report code statistics after GC")
1104 : DEFINE_BOOL(print_handles, false, "report handles after GC")
1105 : DEFINE_BOOL(check_handle_count, false,
1106 : "Check that there are not too many handles at GC")
1107 : DEFINE_BOOL(print_global_handles, false, "report global handles after GC")
1108 :
1109 : // TurboFan debug-only flags.
1110 : DEFINE_BOOL(trace_turbo_escape, false, "enable tracing in escape analysis")
1111 :
1112 : // objects.cc
1113 : DEFINE_BOOL(trace_normalization, false,
1114 : "prints when objects are turned into dictionaries.")
1115 :
1116 : // runtime.cc
1117 : DEFINE_BOOL(trace_lazy, false, "trace lazy compilation")
1118 :
1119 : // spaces.cc
1120 : DEFINE_BOOL(collect_heap_spill_statistics, false,
1121 : "report heap spill statistics along with heap_stats "
1122 : "(requires heap_stats)")
1123 : DEFINE_BOOL(trace_live_bytes, false,
1124 : "trace incrementing and resetting of live bytes")
1125 : DEFINE_BOOL(trace_isolates, false, "trace isolate state changes")
1126 :
1127 : // Regexp
1128 : DEFINE_BOOL(regexp_possessive_quantifier, false,
1129 : "enable possessive quantifier syntax for testing")
1130 : DEFINE_BOOL(trace_regexp_bytecodes, false, "trace regexp bytecode execution")
1131 : DEFINE_BOOL(trace_regexp_assembler, false,
1132 : "trace regexp macro assembler calls.")
1133 : DEFINE_BOOL(trace_regexp_parser, false, "trace regexp parsing")
1134 :
1135 : // Debugger
1136 : DEFINE_BOOL(print_break_location, false, "print source location on debug break")
1137 :
1138 : // wasm instance management
1139 : DEFINE_BOOL(trace_wasm_instances, false,
1140 : "trace creation and collection of wasm instances")
1141 :
1142 : //
1143 : // Logging and profiling flags
1144 : //
1145 : #undef FLAG
1146 : #define FLAG FLAG_FULL
1147 :
1148 : // log.cc
1149 : DEFINE_BOOL(log, false,
1150 : "Minimal logging (no API, code, GC, suspect, or handles samples).")
1151 : DEFINE_BOOL(log_all, false, "Log all events to the log file.")
1152 : DEFINE_BOOL(log_api, false, "Log API events to the log file.")
1153 : DEFINE_BOOL(log_code, false,
1154 : "Log code events to the log file without profiling.")
1155 : DEFINE_BOOL(log_gc, false,
1156 : "Log heap samples on garbage collection for the hp2ps tool.")
1157 : DEFINE_BOOL(log_handles, false, "Log global handle events.")
1158 : DEFINE_BOOL(log_suspect, false, "Log suspect operations.")
1159 : DEFINE_BOOL(prof, false,
1160 : "Log statistical profiling information (implies --log-code).")
1161 :
1162 : #if defined(ANDROID)
1163 : // Phones and tablets have processors that are much slower than desktop
1164 : // and laptop computers for which current heuristics are tuned.
1165 : #define DEFAULT_PROF_SAMPLING_INTERVAL 5000
1166 : #else
1167 : #define DEFAULT_PROF_SAMPLING_INTERVAL 1000
1168 : #endif
1169 : DEFINE_INT(prof_sampling_interval, DEFAULT_PROF_SAMPLING_INTERVAL,
1170 : "Interval for --prof samples (in microseconds).")
1171 : #undef DEFAULT_PROF_SAMPLING_INTERVAL
1172 :
1173 : DEFINE_BOOL(prof_cpp, false, "Like --prof, but ignore generated code.")
1174 206204 : DEFINE_IMPLICATION(prof, prof_cpp)
1175 : DEFINE_BOOL(prof_browser_mode, true,
1176 : "Used with --prof, turns on browser-compatible mode for profiling.")
1177 : DEFINE_STRING(logfile, "v8.log", "Specify the name of the log file.")
1178 : DEFINE_BOOL(logfile_per_isolate, true, "Separate log files for each isolate.")
1179 : DEFINE_BOOL(ll_prof, false, "Enable low-level linux profiler.")
1180 : DEFINE_BOOL(perf_basic_prof, false,
1181 : "Enable perf linux profiler (basic support).")
1182 206204 : DEFINE_NEG_IMPLICATION(perf_basic_prof, compact_code_space)
1183 : DEFINE_BOOL(perf_basic_prof_only_functions, false,
1184 : "Only report function code ranges to perf (i.e. no stubs).")
1185 206204 : DEFINE_IMPLICATION(perf_basic_prof_only_functions, perf_basic_prof)
1186 : DEFINE_BOOL(perf_prof, false,
1187 : "Enable perf linux profiler (experimental annotate support).")
1188 206204 : DEFINE_NEG_IMPLICATION(perf_prof, compact_code_space)
1189 : DEFINE_BOOL(perf_prof_unwinding_info, false,
1190 : "Enable unwinding info for perf linux profiler (experimental).")
1191 206204 : DEFINE_IMPLICATION(perf_prof, perf_prof_unwinding_info)
1192 : DEFINE_STRING(gc_fake_mmap, "/tmp/__v8_gc__",
1193 : "Specify the name of the file for fake gc mmap used in ll_prof")
1194 : DEFINE_BOOL(log_internal_timer_events, false, "Time internal events.")
1195 : DEFINE_BOOL(log_timer_events, false,
1196 : "Time events including external callbacks.")
1197 206204 : DEFINE_IMPLICATION(log_timer_events, log_internal_timer_events)
1198 206204 : DEFINE_IMPLICATION(log_internal_timer_events, prof)
1199 : DEFINE_BOOL(log_instruction_stats, false, "Log AArch64 instruction statistics.")
1200 : DEFINE_STRING(log_instruction_file, "arm64_inst.csv",
1201 : "AArch64 instruction statistics log file.")
1202 : DEFINE_INT(log_instruction_period, 1 << 22,
1203 : "AArch64 instruction statistics logging period.")
1204 :
1205 : DEFINE_BOOL(redirect_code_traces, false,
1206 : "output deopt information and disassembly into file "
1207 : "code-<pid>-<isolate id>.asm")
1208 : DEFINE_STRING(redirect_code_traces_to, NULL,
1209 : "output deopt information and disassembly into the given file")
1210 :
1211 : DEFINE_BOOL(hydrogen_track_positions, false,
1212 : "track source code positions when building IR")
1213 :
1214 : DEFINE_BOOL(print_opt_source, false,
1215 : "print source code of optimized and inlined functions")
1216 206204 : DEFINE_IMPLICATION(hydrogen_track_positions, print_opt_source)
1217 :
1218 : //
1219 : // Disassembler only flags
1220 : //
1221 : #undef FLAG
1222 : #ifdef ENABLE_DISASSEMBLER
1223 : #define FLAG FLAG_FULL
1224 : #else
1225 : #define FLAG FLAG_READONLY
1226 : #endif
1227 :
1228 : // elements.cc
1229 : DEFINE_BOOL(trace_elements_transitions, false, "trace elements transitions")
1230 :
1231 : DEFINE_BOOL(trace_creation_allocation_sites, false,
1232 : "trace the creation of allocation sites")
1233 :
1234 : // code-stubs.cc
1235 : DEFINE_BOOL(print_code_stubs, false, "print code stubs")
1236 : DEFINE_BOOL(test_secondary_stub_cache, false,
1237 : "test secondary stub cache by disabling the primary one")
1238 :
1239 : DEFINE_BOOL(test_primary_stub_cache, false,
1240 : "test primary stub cache by disabling the secondary one")
1241 :
1242 : DEFINE_BOOL(test_small_max_function_context_stub_size, false,
1243 : "enable testing the function context size overflow path "
1244 : "by making the maximum size smaller")
1245 :
1246 : // codegen-ia32.cc / codegen-arm.cc
1247 : DEFINE_BOOL(print_code, false, "print generated code")
1248 : DEFINE_BOOL(print_opt_code, false, "print optimized code")
1249 : DEFINE_STRING(print_opt_code_filter, "*", "filter for printing optimized code")
1250 : DEFINE_BOOL(print_unopt_code, false,
1251 : "print unoptimized code before "
1252 : "printing optimized code based on it")
1253 : DEFINE_BOOL(print_code_verbose, false, "print more information for code")
1254 : DEFINE_BOOL(print_builtin_code, false, "print generated code for builtins")
1255 :
1256 : #ifdef ENABLE_DISASSEMBLER
1257 : DEFINE_BOOL(sodium, false,
1258 : "print generated code output suitable for use with "
1259 : "the Sodium code viewer")
1260 :
1261 : DEFINE_IMPLICATION(sodium, print_code_stubs)
1262 : DEFINE_IMPLICATION(sodium, print_code)
1263 : DEFINE_IMPLICATION(sodium, print_opt_code)
1264 : DEFINE_IMPLICATION(sodium, hydrogen_track_positions)
1265 : DEFINE_IMPLICATION(sodium, code_comments)
1266 :
1267 : DEFINE_BOOL(print_all_code, false, "enable all flags related to printing code")
1268 : DEFINE_IMPLICATION(print_all_code, print_code)
1269 : DEFINE_IMPLICATION(print_all_code, print_opt_code)
1270 : DEFINE_IMPLICATION(print_all_code, print_unopt_code)
1271 : DEFINE_IMPLICATION(print_all_code, print_code_verbose)
1272 : DEFINE_IMPLICATION(print_all_code, print_builtin_code)
1273 : DEFINE_IMPLICATION(print_all_code, print_code_stubs)
1274 : DEFINE_IMPLICATION(print_all_code, code_comments)
1275 : #ifdef DEBUG
1276 : DEFINE_IMPLICATION(print_all_code, trace_codegen)
1277 : #endif
1278 : #endif
1279 :
1280 : #undef FLAG
1281 : #define FLAG FLAG_FULL
1282 :
1283 : //
1284 : // Predictable mode related flags.
1285 : //
1286 :
1287 : DEFINE_BOOL(predictable, false, "enable predictable mode")
1288 206204 : DEFINE_IMPLICATION(predictable, single_threaded)
1289 206204 : DEFINE_NEG_IMPLICATION(predictable, memory_reducer)
1290 206204 : DEFINE_VALUE_IMPLICATION(single_threaded, wasm_num_compilation_tasks, 0)
1291 :
1292 : //
1293 : // Threading related flags.
1294 : //
1295 :
1296 : DEFINE_BOOL(single_threaded, false, "disable the use of background tasks")
1297 206204 : DEFINE_NEG_IMPLICATION(single_threaded, concurrent_recompilation)
1298 206204 : DEFINE_NEG_IMPLICATION(single_threaded, concurrent_marking)
1299 206204 : DEFINE_NEG_IMPLICATION(single_threaded, concurrent_sweeping)
1300 206204 : DEFINE_NEG_IMPLICATION(single_threaded, parallel_compaction)
1301 206204 : DEFINE_NEG_IMPLICATION(single_threaded, parallel_pointer_update)
1302 206204 : DEFINE_NEG_IMPLICATION(single_threaded, concurrent_store_buffer)
1303 206204 : DEFINE_NEG_IMPLICATION(single_threaded, compiler_dispatcher)
1304 :
1305 : #undef FLAG
1306 :
1307 : #ifdef VERIFY_PREDICTABLE
1308 : #define FLAG FLAG_FULL
1309 : #else
1310 : #define FLAG FLAG_READONLY
1311 : #endif
1312 :
1313 : DEFINE_BOOL(verify_predictable, false,
1314 : "this mode is used for checking that V8 behaves predictably")
1315 : DEFINE_INT(dump_allocations_digest_at_alloc, -1,
1316 : "dump allocations digest each n-th allocation")
1317 :
1318 : //
1319 : // Read-only flags
1320 : //
1321 : #undef FLAG
1322 : #define FLAG FLAG_READONLY
1323 :
1324 : // assembler.h
1325 : DEFINE_BOOL(enable_embedded_constant_pool, V8_EMBEDDED_CONSTANT_POOL,
1326 : "enable use of embedded constant pools (PPC only)")
1327 :
1328 : DEFINE_BOOL(unbox_double_fields, V8_DOUBLE_FIELDS_UNBOXING,
1329 : "enable in-object double fields unboxing (64-bit only)")
1330 206204 : DEFINE_IMPLICATION(unbox_double_fields, track_double_fields)
1331 :
1332 : // Cleanup...
1333 : #undef FLAG_FULL
1334 : #undef FLAG_READONLY
1335 : #undef FLAG
1336 : #undef FLAG_ALIAS
1337 :
1338 : #undef DEFINE_BOOL
1339 : #undef DEFINE_MAYBE_BOOL
1340 : #undef DEFINE_INT
1341 : #undef DEFINE_STRING
1342 : #undef DEFINE_FLOAT
1343 : #undef DEFINE_ARGS
1344 : #undef DEFINE_IMPLICATION
1345 : #undef DEFINE_NEG_IMPLICATION
1346 : #undef DEFINE_NEG_VALUE_IMPLICATION
1347 : #undef DEFINE_VALUE_IMPLICATION
1348 : #undef DEFINE_ALIAS_BOOL
1349 : #undef DEFINE_ALIAS_INT
1350 : #undef DEFINE_ALIAS_STRING
1351 : #undef DEFINE_ALIAS_FLOAT
1352 : #undef DEFINE_ALIAS_ARGS
1353 :
1354 : #undef FLAG_MODE_DECLARE
1355 : #undef FLAG_MODE_DEFINE
1356 : #undef FLAG_MODE_DEFINE_DEFAULTS
1357 : #undef FLAG_MODE_META
1358 : #undef FLAG_MODE_DEFINE_IMPLICATIONS
1359 :
1360 : #undef COMMA
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