1 // Copyright 2012 the V8 project authors. All rights reserved. 2 // Redistribution and use in source and binary forms, with or without 3 // modification, are permitted provided that the following conditions are 4 // met: 5 // 6 // * Redistributions of source code must retain the above copyright 7 // notice, this list of conditions and the following disclaimer. 8 // * Redistributions in binary form must reproduce the above 9 // copyright notice, this list of conditions and the following 10 // disclaimer in the documentation and/or other materials provided 11 // with the distribution. 12 // * Neither the name of Google Inc. nor the names of its 13 // contributors may be used to endorse or promote products derived 14 // from this software without specific prior written permission. 15 // 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28 // This file defines all of the flags. It is separated into different section, 29 // for Debug, Release, Logging and Profiling, etc. To add a new flag, find the 30 // correct section, and use one of the DEFINE_ macros, without a trailing ';'. 31 // 32 // This include does not have a guard, because it is a template-style include, 33 // which can be included multiple times in different modes. It expects to have 34 // a mode defined before it's included. The modes are FLAG_MODE_... below: 35 36 // We want to declare the names of the variables for the header file. Normally 37 // this will just be an extern declaration, but for a readonly flag we let the 38 // compiler make better optimizations by giving it the value. 39 #if defined(FLAG_MODE_DECLARE) 40 #define FLAG_FULL(ftype, ctype, nam, def, cmt) \ 41 extern ctype FLAG_##nam; 42 #define FLAG_READONLY(ftype, ctype, nam, def, cmt) \ 43 static ctype const FLAG_##nam = def; 44 #define DEFINE_implication(whenflag, thenflag) 45 46 // We want to supply the actual storage and value for the flag variable in the 47 // .cc file. We only do this for writable flags. 48 #elif defined(FLAG_MODE_DEFINE) 49 #define FLAG_FULL(ftype, ctype, nam, def, cmt) \ 50 ctype FLAG_##nam = def; 51 #define FLAG_READONLY(ftype, ctype, nam, def, cmt) 52 #define DEFINE_implication(whenflag, thenflag) 53 54 // We need to define all of our default values so that the Flag structure can 55 // access them by pointer. These are just used internally inside of one .cc, 56 // for MODE_META, so there is no impact on the flags interface. 57 #elif defined(FLAG_MODE_DEFINE_DEFAULTS) 58 #define FLAG_FULL(ftype, ctype, nam, def, cmt) \ 59 static ctype const FLAGDEFAULT_##nam = def; 60 #define FLAG_READONLY(ftype, ctype, nam, def, cmt) 61 #define DEFINE_implication(whenflag, thenflag) 62 63 // We want to write entries into our meta data table, for internal parsing and 64 // printing / etc in the flag parser code. We only do this for writable flags. 65 #elif defined(FLAG_MODE_META) 66 #define FLAG_FULL(ftype, ctype, nam, def, cmt) \ 67 { Flag::TYPE_##ftype, #nam, &FLAG_##nam, &FLAGDEFAULT_##nam, cmt, false }, 68 #define FLAG_READONLY(ftype, ctype, nam, def, cmt) 69 #define DEFINE_implication(whenflag, thenflag) 70 71 // We produce the code to set flags when it is implied by another flag. 72 #elif defined(FLAG_MODE_DEFINE_IMPLICATIONS) 73 #define FLAG_FULL(ftype, ctype, nam, def, cmt) 74 #define FLAG_READONLY(ftype, ctype, nam, def, cmt) 75 #define DEFINE_implication(whenflag, thenflag) \ 76 if (FLAG_##whenflag) FLAG_##thenflag = true; 77 78 #else 79 #error No mode supplied when including flags.defs 80 #endif 81 82 #ifdef FLAG_MODE_DECLARE 83 // Structure used to hold a collection of arguments to the JavaScript code. 84 #define JSARGUMENTS_INIT {{}} 85 struct JSArguments { 86 public: 87 inline int argc() const { 88 return static_cast<int>(storage_[0]); 89 } 90 inline const char** argv() const { 91 return reinterpret_cast<const char**>(storage_[1]); 92 } 93 inline const char*& operator[] (int idx) const { 94 return argv()[idx]; 95 } 96 inline JSArguments& operator=(JSArguments args) { 97 set_argc(args.argc()); 98 set_argv(args.argv()); 99 return *this; 100 } 101 static JSArguments Create(int argc, const char** argv) { 102 JSArguments args; 103 args.set_argc(argc); 104 args.set_argv(argv); 105 return args; 106 } 107 private: 108 void set_argc(int argc) { 109 storage_[0] = argc; 110 } 111 void set_argv(const char** argv) { 112 storage_[1] = reinterpret_cast<AtomicWord>(argv); 113 } 114 public: 115 // Contains argc and argv. Unfortunately we have to store these two fields 116 // into a single one to avoid making the initialization macro (which would be 117 // "{ 0, NULL }") contain a coma. 118 AtomicWord storage_[2]; 119 }; 120 #endif 121 122 #define DEFINE_bool(nam, def, cmt) FLAG(BOOL, bool, nam, def, cmt) 123 #define DEFINE_int(nam, def, cmt) FLAG(INT, int, nam, def, cmt) 124 #define DEFINE_float(nam, def, cmt) FLAG(FLOAT, double, nam, def, cmt) 125 #define DEFINE_string(nam, def, cmt) FLAG(STRING, const char*, nam, def, cmt) 126 #define DEFINE_args(nam, def, cmt) FLAG(ARGS, JSArguments, nam, def, cmt) 127 128 // 129 // Flags in all modes. 130 // 131 #define FLAG FLAG_FULL 132 133 // Flags for language modes and experimental language features. 134 DEFINE_bool(use_strict, false, "enforce strict mode") 135 136 DEFINE_bool(harmony_typeof, false, "enable harmony semantics for typeof") 137 DEFINE_bool(harmony_scoping, false, "enable harmony block scoping") 138 DEFINE_bool(harmony_modules, false, 139 "enable harmony modules (implies block scoping)") 140 DEFINE_bool(harmony_proxies, false, "enable harmony proxies") 141 DEFINE_bool(harmony_collections, false, 142 "enable harmony collections (sets, maps, and weak maps)") 143 DEFINE_bool(harmony, false, "enable all harmony features (except typeof)") 144 DEFINE_implication(harmony, harmony_scoping) 145 DEFINE_implication(harmony, harmony_modules) 146 DEFINE_implication(harmony, harmony_proxies) 147 DEFINE_implication(harmony, harmony_collections) 148 DEFINE_implication(harmony_modules, harmony_scoping) 149 150 // Flags for experimental implementation features. 151 DEFINE_bool(smi_only_arrays, true, "tracks arrays with only smi values") 152 DEFINE_bool(clever_optimizations, 153 true, 154 "Optimize object size, Array shift, DOM strings and string +") 155 156 // Flags for data representation optimizations 157 DEFINE_bool(unbox_double_arrays, true, "automatically unbox arrays of doubles") 158 DEFINE_bool(string_slices, true, "use string slices") 159 160 // Flags for Crankshaft. 161 DEFINE_bool(crankshaft, true, "use crankshaft") 162 DEFINE_string(hydrogen_filter, "", "optimization filter") 163 DEFINE_bool(use_range, true, "use hydrogen range analysis") 164 DEFINE_bool(eliminate_dead_phis, true, "eliminate dead phis") 165 DEFINE_bool(use_gvn, true, "use hydrogen global value numbering") 166 DEFINE_bool(use_canonicalizing, true, "use hydrogen instruction canonicalizing") 167 DEFINE_bool(use_inlining, true, "use function inlining") 168 DEFINE_bool(limit_inlining, true, "limit code size growth from inlining") 169 DEFINE_bool(loop_invariant_code_motion, true, "loop invariant code motion") 170 DEFINE_bool(collect_megamorphic_maps_from_stub_cache, 171 true, 172 "crankshaft harvests type feedback from stub cache") 173 DEFINE_bool(hydrogen_stats, false, "print statistics for hydrogen") 174 DEFINE_bool(trace_hydrogen, false, "trace generated hydrogen to file") 175 DEFINE_string(trace_phase, "Z", "trace generated IR for specified phases") 176 DEFINE_bool(trace_inlining, false, "trace inlining decisions") 177 DEFINE_bool(trace_alloc, false, "trace register allocator") 178 DEFINE_bool(trace_all_uses, false, "trace all use positions") 179 DEFINE_bool(trace_range, false, "trace range analysis") 180 DEFINE_bool(trace_gvn, false, "trace global value numbering") 181 DEFINE_bool(trace_representation, false, "trace representation types") 182 DEFINE_bool(stress_pointer_maps, false, "pointer map for every instruction") 183 DEFINE_bool(stress_environments, false, "environment for every instruction") 184 DEFINE_int(deopt_every_n_times, 185 0, 186 "deoptimize every n times a deopt point is passed") 187 DEFINE_bool(trap_on_deopt, false, "put a break point before deoptimizing") 188 DEFINE_bool(deoptimize_uncommon_cases, true, "deoptimize uncommon cases") 189 DEFINE_bool(polymorphic_inlining, true, "polymorphic inlining") 190 DEFINE_bool(use_osr, true, "use on-stack replacement") 191 192 DEFINE_bool(trace_osr, false, "trace on-stack replacement") 193 DEFINE_int(stress_runs, 0, "number of stress runs") 194 DEFINE_bool(optimize_closures, true, "optimize closures") 195 DEFINE_bool(inline_construct, true, "inline constructor calls") 196 DEFINE_bool(inline_arguments, true, "inline functions with arguments object") 197 DEFINE_int(loop_weight, 1, "loop weight for representation inference") 198 199 DEFINE_bool(optimize_for_in, true, 200 "optimize functions containing for-in loops") 201 202 // Experimental profiler changes. 203 DEFINE_bool(experimental_profiler, true, "enable all profiler experiments") 204 DEFINE_bool(watch_ic_patching, false, "profiler considers IC stability") 205 DEFINE_int(frame_count, 1, "number of stack frames inspected by the profiler") 206 DEFINE_bool(self_optimization, false, 207 "primitive functions trigger their own optimization") 208 DEFINE_bool(direct_self_opt, false, 209 "call recompile stub directly when self-optimizing") 210 DEFINE_bool(retry_self_opt, false, "re-try self-optimization if it failed") 211 DEFINE_bool(count_based_interrupts, false, 212 "trigger profiler ticks based on counting instead of timing") 213 DEFINE_bool(interrupt_at_exit, false, 214 "insert an interrupt check at function exit") 215 DEFINE_bool(weighted_back_edges, false, 216 "weight back edges by jump distance for interrupt triggering") 217 DEFINE_int(interrupt_budget, 5900, 218 "execution budget before interrupt is triggered") 219 DEFINE_int(type_info_threshold, 15, 220 "percentage of ICs that must have type info to allow optimization") 221 DEFINE_int(self_opt_count, 130, "call count before self-optimization") 222 223 DEFINE_implication(experimental_profiler, watch_ic_patching) 224 DEFINE_implication(experimental_profiler, self_optimization) 225 // Not implying direct_self_opt here because it seems to be a bad idea. 226 DEFINE_implication(experimental_profiler, retry_self_opt) 227 DEFINE_implication(experimental_profiler, count_based_interrupts) 228 DEFINE_implication(experimental_profiler, interrupt_at_exit) 229 DEFINE_implication(experimental_profiler, weighted_back_edges) 230 231 DEFINE_bool(trace_opt_verbose, false, "extra verbose compilation tracing") 232 DEFINE_implication(trace_opt_verbose, trace_opt) 233 234 // assembler-ia32.cc / assembler-arm.cc / assembler-x64.cc 235 DEFINE_bool(debug_code, false, 236 "generate extra code (assertions) for debugging") 237 DEFINE_bool(code_comments, false, "emit comments in code disassembly") 238 DEFINE_bool(enable_sse2, true, 239 "enable use of SSE2 instructions if available") 240 DEFINE_bool(enable_sse3, true, 241 "enable use of SSE3 instructions if available") 242 DEFINE_bool(enable_sse4_1, true, 243 "enable use of SSE4.1 instructions if available") 244 DEFINE_bool(enable_cmov, true, 245 "enable use of CMOV instruction if available") 246 DEFINE_bool(enable_rdtsc, true, 247 "enable use of RDTSC instruction if available") 248 DEFINE_bool(enable_sahf, true, 249 "enable use of SAHF instruction if available (X64 only)") 250 DEFINE_bool(enable_vfp3, true, 251 "enable use of VFP3 instructions if available - this implies " 252 "enabling ARMv7 instructions (ARM only)") 253 DEFINE_bool(enable_armv7, true, 254 "enable use of ARMv7 instructions if available (ARM only)") 255 DEFINE_bool(enable_fpu, true, 256 "enable use of MIPS FPU instructions if available (MIPS only)") 257 258 // bootstrapper.cc 259 DEFINE_string(expose_natives_as, NULL, "expose natives in global object") 260 DEFINE_string(expose_debug_as, NULL, "expose debug in global object") 261 DEFINE_bool(expose_gc, false, "expose gc extension") 262 DEFINE_bool(expose_externalize_string, false, 263 "expose externalize string extension") 264 DEFINE_int(stack_trace_limit, 10, "number of stack frames to capture") 265 DEFINE_bool(builtins_in_stack_traces, false, 266 "show built-in functions in stack traces") 267 DEFINE_bool(disable_native_files, false, "disable builtin natives files") 268 269 // builtins-ia32.cc 270 DEFINE_bool(inline_new, true, "use fast inline allocation") 271 272 // checks.cc 273 DEFINE_bool(stack_trace_on_abort, true, 274 "print a stack trace if an assertion failure occurs") 275 276 // codegen-ia32.cc / codegen-arm.cc 277 DEFINE_bool(trace, false, "trace function calls") 278 DEFINE_bool(mask_constants_with_cookie, 279 true, 280 "use random jit cookie to mask large constants") 281 282 // codegen.cc 283 DEFINE_bool(lazy, true, "use lazy compilation") 284 DEFINE_bool(trace_opt, false, "trace lazy optimization") 285 DEFINE_bool(trace_opt_stats, false, "trace lazy optimization statistics") 286 DEFINE_bool(opt, true, "use adaptive optimizations") 287 DEFINE_bool(always_opt, false, "always try to optimize functions") 288 DEFINE_bool(prepare_always_opt, false, "prepare for turning on always opt") 289 DEFINE_bool(trace_deopt, false, "trace deoptimization") 290 291 // compiler.cc 292 DEFINE_int(min_preparse_length, 1024, 293 "minimum length for automatic enable preparsing") 294 DEFINE_bool(always_full_compiler, false, 295 "try to use the dedicated run-once backend for all code") 296 DEFINE_bool(trace_bailout, false, 297 "print reasons for falling back to using the classic V8 backend") 298 299 // compilation-cache.cc 300 DEFINE_bool(compilation_cache, true, "enable compilation cache") 301 302 DEFINE_bool(cache_prototype_transitions, true, "cache prototype transitions") 303 304 // debug.cc 305 DEFINE_bool(trace_debug_json, false, "trace debugging JSON request/response") 306 DEFINE_bool(debugger_auto_break, true, 307 "automatically set the debug break flag when debugger commands are " 308 "in the queue") 309 DEFINE_bool(enable_liveedit, true, "enable liveedit experimental feature") 310 DEFINE_bool(break_on_abort, true, "always cause a debug break before aborting") 311 312 // execution.cc 313 // Slightly less than 1MB on 64-bit, since Windows' default stack size for 314 // the main execution thread is 1MB for both 32 and 64-bit. 315 DEFINE_int(stack_size, kPointerSize * 123, 316 "default size of stack region v8 is allowed to use (in kBytes)") 317 318 // frames.cc 319 DEFINE_int(max_stack_trace_source_length, 300, 320 "maximum length of function source code printed in a stack trace.") 321 322 // full-codegen.cc 323 DEFINE_bool(always_inline_smi_code, false, 324 "always inline smi code in non-opt code") 325 326 // heap.cc 327 DEFINE_int(max_new_space_size, 0, "max size of the new generation (in kBytes)") 328 DEFINE_int(max_old_space_size, 0, "max size of the old generation (in Mbytes)") 329 DEFINE_int(max_executable_size, 0, "max size of executable memory (in Mbytes)") 330 DEFINE_bool(gc_global, false, "always perform global GCs") 331 DEFINE_int(gc_interval, -1, "garbage collect after <n> allocations") 332 DEFINE_bool(trace_gc, false, 333 "print one trace line following each garbage collection") 334 DEFINE_bool(trace_gc_nvp, false, 335 "print one detailed trace line in name=value format " 336 "after each garbage collection") 337 DEFINE_bool(print_cumulative_gc_stat, false, 338 "print cumulative GC statistics in name=value format on exit") 339 DEFINE_bool(trace_gc_verbose, false, 340 "print more details following each garbage collection") 341 DEFINE_bool(trace_fragmentation, false, 342 "report fragmentation for old pointer and data pages") 343 DEFINE_bool(collect_maps, true, 344 "garbage collect maps from which no objects can be reached") 345 DEFINE_bool(flush_code, true, 346 "flush code that we expect not to use again before full gc") 347 DEFINE_bool(incremental_marking, true, "use incremental marking") 348 DEFINE_bool(incremental_marking_steps, true, "do incremental marking steps") 349 DEFINE_bool(trace_incremental_marking, false, 350 "trace progress of the incremental marking") 351 352 // v8.cc 353 DEFINE_bool(use_idle_notification, true, 354 "Use idle notification to reduce memory footprint.") 355 356 DEFINE_bool(send_idle_notification, false, 357 "Send idle notifcation between stress runs.") 358 // ic.cc 359 DEFINE_bool(use_ic, true, "use inline caching") 360 361 #ifdef LIVE_OBJECT_LIST 362 // liveobjectlist.cc 363 DEFINE_string(lol_workdir, NULL, "path for lol temp files") 364 DEFINE_bool(verify_lol, false, "perform debugging verification for lol") 365 #endif 366 367 // macro-assembler-ia32.cc 368 DEFINE_bool(native_code_counters, false, 369 "generate extra code for manipulating stats counters") 370 371 // mark-compact.cc 372 DEFINE_bool(always_compact, false, "Perform compaction on every full GC") 373 DEFINE_bool(lazy_sweeping, true, 374 "Use lazy sweeping for old pointer and data spaces") 375 DEFINE_bool(never_compact, false, 376 "Never perform compaction on full GC - testing only") 377 DEFINE_bool(compact_code_space, true, 378 "Compact code space on full non-incremental collections") 379 DEFINE_bool(cleanup_code_caches_at_gc, true, 380 "Flush inline caches prior to mark compact collection and " 381 "flush code caches in maps during mark compact cycle.") 382 DEFINE_int(random_seed, 0, 383 "Default seed for initializing random generator " 384 "(0, the default, means to use system random).") 385 386 // objects.cc 387 DEFINE_bool(use_verbose_printer, true, "allows verbose printing") 388 389 // parser.cc 390 DEFINE_bool(allow_natives_syntax, false, "allow natives syntax") 391 392 // simulator-arm.cc and simulator-mips.cc 393 DEFINE_bool(trace_sim, false, "Trace simulator execution") 394 DEFINE_bool(check_icache, false, 395 "Check icache flushes in ARM and MIPS simulator") 396 DEFINE_int(stop_sim_at, 0, "Simulator stop after x number of instructions") 397 DEFINE_int(sim_stack_alignment, 8, 398 "Stack alingment in bytes in simulator (4 or 8, 8 is default)") 399 400 // isolate.cc 401 DEFINE_bool(trace_exception, false, 402 "print stack trace when throwing exceptions") 403 DEFINE_bool(preallocate_message_memory, false, 404 "preallocate some memory to build stack traces.") 405 DEFINE_bool(randomize_hashes, 406 true, 407 "randomize hashes to avoid predictable hash collisions " 408 "(with snapshots this option cannot override the baked-in seed)") 409 DEFINE_int(hash_seed, 410 0, 411 "Fixed seed to use to hash property keys (0 means random)" 412 "(with snapshots this option cannot override the baked-in seed)") 413 414 // v8.cc 415 DEFINE_bool(preemption, false, 416 "activate a 100ms timer that switches between V8 threads") 417 418 // Regexp 419 DEFINE_bool(regexp_optimization, true, "generate optimized regexp code") 420 421 // Testing flags test/cctest/test-{flags,api,serialization}.cc 422 DEFINE_bool(testing_bool_flag, true, "testing_bool_flag") 423 DEFINE_int(testing_int_flag, 13, "testing_int_flag") 424 DEFINE_float(testing_float_flag, 2.5, "float-flag") 425 DEFINE_string(testing_string_flag, "Hello, world!", "string-flag") 426 DEFINE_int(testing_prng_seed, 42, "Seed used for threading test randomness") 427 #ifdef WIN32 428 DEFINE_string(testing_serialization_file, "C:\\Windows\\Temp\\serdes", 429 "file in which to testing_serialize heap") 430 #else 431 DEFINE_string(testing_serialization_file, "/tmp/serdes", 432 "file in which to serialize heap") 433 #endif 434 435 // 436 // Dev shell flags 437 // 438 439 DEFINE_bool(help, false, "Print usage message, including flags, on console") 440 DEFINE_bool(dump_counters, false, "Dump counters on exit") 441 442 #ifdef ENABLE_DEBUGGER_SUPPORT 443 DEFINE_bool(debugger, false, "Enable JavaScript debugger") 444 DEFINE_bool(remote_debugger, false, "Connect JavaScript debugger to the " 445 "debugger agent in another process") 446 DEFINE_bool(debugger_agent, false, "Enable debugger agent") 447 DEFINE_int(debugger_port, 5858, "Port to use for remote debugging") 448 #endif // ENABLE_DEBUGGER_SUPPORT 449 450 DEFINE_string(map_counters, "", "Map counters to a file") 451 DEFINE_args(js_arguments, JSARGUMENTS_INIT, 452 "Pass all remaining arguments to the script. Alias for \"--\".") 453 454 #if defined(WEBOS__) 455 DEFINE_bool(debug_compile_events, false, "Enable debugger compile events") 456 DEFINE_bool(debug_script_collected_events, false, 457 "Enable debugger script collected events") 458 #else 459 DEFINE_bool(debug_compile_events, true, "Enable debugger compile events") 460 DEFINE_bool(debug_script_collected_events, true, 461 "Enable debugger script collected events") 462 #endif 463 464 465 // 466 // GDB JIT integration flags. 467 // 468 469 DEFINE_bool(gdbjit, false, "enable GDBJIT interface (disables compacting GC)") 470 DEFINE_bool(gdbjit_full, false, "enable GDBJIT interface for all code objects") 471 DEFINE_bool(gdbjit_dump, false, "dump elf objects with debug info to disk") 472 DEFINE_string(gdbjit_dump_filter, "", 473 "dump only objects containing this substring") 474 475 // mark-compact.cc 476 DEFINE_bool(force_marking_deque_overflows, false, 477 "force overflows of marking deque by reducing it's size " 478 "to 64 words") 479 480 DEFINE_bool(stress_compaction, false, 481 "stress the GC compactor to flush out bugs (implies " 482 "--force_marking_deque_overflows)") 483 484 // 485 // Debug only flags 486 // 487 #undef FLAG 488 #ifdef DEBUG 489 #define FLAG FLAG_FULL 490 #else 491 #define FLAG FLAG_READONLY 492 #endif 493 494 // checks.cc 495 DEFINE_bool(enable_slow_asserts, false, 496 "enable asserts that are slow to execute") 497 498 // codegen-ia32.cc / codegen-arm.cc 499 DEFINE_bool(trace_codegen, false, 500 "print name of functions for which code is generated") 501 DEFINE_bool(print_source, false, "pretty print source code") 502 DEFINE_bool(print_builtin_source, false, 503 "pretty print source code for builtins") 504 DEFINE_bool(print_ast, false, "print source AST") 505 DEFINE_bool(print_builtin_ast, false, "print source AST for builtins") 506 DEFINE_string(stop_at, "", "function name where to insert a breakpoint") 507 508 // compiler.cc 509 DEFINE_bool(print_builtin_scopes, false, "print scopes for builtins") 510 DEFINE_bool(print_scopes, false, "print scopes") 511 512 // contexts.cc 513 DEFINE_bool(trace_contexts, false, "trace contexts operations") 514 515 // heap.cc 516 DEFINE_bool(gc_greedy, false, "perform GC prior to some allocations") 517 DEFINE_bool(gc_verbose, false, "print stuff during garbage collection") 518 DEFINE_bool(heap_stats, false, "report heap statistics before and after GC") 519 DEFINE_bool(code_stats, false, "report code statistics after GC") 520 DEFINE_bool(verify_heap, false, "verify heap pointers before and after GC") 521 DEFINE_bool(print_handles, false, "report handles after GC") 522 DEFINE_bool(print_global_handles, false, "report global handles after GC") 523 524 // ic.cc 525 DEFINE_bool(trace_ic, false, "trace inline cache state transitions") 526 527 // interface.cc 528 DEFINE_bool(print_interfaces, false, "print interfaces") 529 DEFINE_bool(print_interface_details, false, "print interface inference details") 530 DEFINE_int(print_interface_depth, 5, "depth for printing interfaces") 531 532 // objects.cc 533 DEFINE_bool(trace_normalization, 534 false, 535 "prints when objects are turned into dictionaries.") 536 537 // runtime.cc 538 DEFINE_bool(trace_lazy, false, "trace lazy compilation") 539 540 // spaces.cc 541 DEFINE_bool(collect_heap_spill_statistics, false, 542 "report heap spill statistics along with heap_stats " 543 "(requires heap_stats)") 544 545 DEFINE_bool(trace_isolates, false, "trace isolate state changes") 546 547 // VM state 548 DEFINE_bool(log_state_changes, false, "Log state changes.") 549 550 // Regexp 551 DEFINE_bool(regexp_possessive_quantifier, 552 false, 553 "enable possessive quantifier syntax for testing") 554 DEFINE_bool(trace_regexp_bytecodes, false, "trace regexp bytecode execution") 555 DEFINE_bool(trace_regexp_assembler, 556 false, 557 "trace regexp macro assembler calls.") 558 559 // 560 // Logging and profiling flags 561 // 562 #undef FLAG 563 #define FLAG FLAG_FULL 564 565 // log.cc 566 DEFINE_bool(log, false, 567 "Minimal logging (no API, code, GC, suspect, or handles samples).") 568 DEFINE_bool(log_all, false, "Log all events to the log file.") 569 DEFINE_bool(log_runtime, false, "Activate runtime system %Log call.") 570 DEFINE_bool(log_api, false, "Log API events to the log file.") 571 DEFINE_bool(log_code, false, 572 "Log code events to the log file without profiling.") 573 DEFINE_bool(log_gc, false, 574 "Log heap samples on garbage collection for the hp2ps tool.") 575 DEFINE_bool(log_handles, false, "Log global handle events.") 576 DEFINE_bool(log_snapshot_positions, false, 577 "log positions of (de)serialized objects in the snapshot.") 578 DEFINE_bool(log_suspect, false, "Log suspect operations.") 579 DEFINE_bool(prof, false, 580 "Log statistical profiling information (implies --log-code).") 581 DEFINE_bool(prof_auto, true, 582 "Used with --prof, starts profiling automatically") 583 DEFINE_bool(prof_lazy, false, 584 "Used with --prof, only does sampling and logging" 585 " when profiler is active (implies --noprof_auto).") 586 DEFINE_bool(prof_browser_mode, true, 587 "Used with --prof, turns on browser-compatible mode for profiling.") 588 DEFINE_bool(log_regexp, false, "Log regular expression execution.") 589 DEFINE_bool(sliding_state_window, false, 590 "Update sliding state window counters.") 591 DEFINE_string(logfile, "v8.log", "Specify the name of the log file.") 592 DEFINE_bool(ll_prof, false, "Enable low-level linux profiler.") 593 594 // 595 // Disassembler only flags 596 // 597 #undef FLAG 598 #ifdef ENABLE_DISASSEMBLER 599 #define FLAG FLAG_FULL 600 #else 601 #define FLAG FLAG_READONLY 602 #endif 603 604 // elements.cc 605 DEFINE_bool(trace_elements_transitions, false, "trace elements transitions") 606 607 // code-stubs.cc 608 DEFINE_bool(print_code_stubs, false, "print code stubs") 609 DEFINE_bool(test_secondary_stub_cache, 610 false, 611 "test secondary stub cache by disabling the primary one") 612 613 DEFINE_bool(test_primary_stub_cache, 614 false, 615 "test primary stub cache by disabling the secondary one") 616 617 // codegen-ia32.cc / codegen-arm.cc 618 DEFINE_bool(print_code, false, "print generated code") 619 DEFINE_bool(print_opt_code, false, "print optimized code") 620 DEFINE_bool(print_unopt_code, false, "print unoptimized code before " 621 "printing optimized code based on it") 622 DEFINE_bool(print_code_verbose, false, "print more information for code") 623 DEFINE_bool(print_builtin_code, false, "print generated code for builtins") 624 625 #ifdef ENABLE_DISASSEMBLER 626 DEFINE_bool(print_all_code, false, "enable all flags related to printing code") 627 DEFINE_implication(print_all_code, print_code) 628 DEFINE_implication(print_all_code, print_opt_code) 629 DEFINE_implication(print_all_code, print_unopt_code) 630 DEFINE_implication(print_all_code, print_code_verbose) 631 DEFINE_implication(print_all_code, print_builtin_code) 632 DEFINE_implication(print_all_code, print_code_stubs) 633 DEFINE_implication(print_all_code, code_comments) 634 #ifdef DEBUG 635 DEFINE_implication(print_all_code, trace_codegen) 636 #endif 637 #endif 638 639 // Cleanup... 640 #undef FLAG_FULL 641 #undef FLAG_READONLY 642 #undef FLAG 643 644 #undef DEFINE_bool 645 #undef DEFINE_int 646 #undef DEFINE_string 647 #undef DEFINE_implication 648 649 #undef FLAG_MODE_DECLARE 650 #undef FLAG_MODE_DEFINE 651 #undef FLAG_MODE_DEFINE_DEFAULTS 652 #undef FLAG_MODE_META 653 #undef FLAG_MODE_DEFINE_IMPLICATIONS 654
