| .TH IO.JS "1" "2010" "" "" |
| |
| |
| .SH "NAME" |
| iojs \- Server-side JavaScript |
| |
| .SH SYNOPSIS |
| |
| |
| .B iojs |
| [ |
| .B \-v |
| ] |
| [ |
| .B \-\-debug |
| | |
| .B \-\-debug-brk |
| ] |
| [ |
| .B \-\-v8-options |
| ] |
| .br |
| [ |
| .B \-e |
| .I command |
| | |
| .I script.js |
| ] |
| [ |
| .I arguments |
| ] |
| |
| Execute without arguments to start the REPL. |
| |
| |
| .SH DESCRIPTION |
| |
| io.js is a set of libraries for javascript which allows |
| it to be used outside of the browser. It is primarily |
| focused on creating simple, easy to build network clients |
| and servers. |
| |
| |
| .SH OPTIONS |
| |
| -v, --version print iojs's version |
| |
| -e, --eval script evaluate script |
| |
| -p, --print print result of --eval |
| |
| -i, --interactive always enter the REPL even if stdin |
| does not appear to be a terminal |
| |
| --no-deprecation silence deprecation warnings |
| |
| --trace-deprecation show stack traces on deprecations |
| |
| --throw-deprecation throw errors on deprecations |
| |
| --v8-options print v8 command line options |
| |
| --max-stack-size=val set max v8 stack size (bytes) |
| |
| |
| .SH ENVIRONMENT VARIABLES |
| |
| .IP NODE_PATH |
| \':\'\-separated list of directories prefixed to the module search path. |
| |
| .IP NODE_MODULE_CONTEXTS |
| If set to 1 then modules will load in their own global contexts. |
| |
| .IP NODE_DISABLE_COLORS |
| If set to 1 then colors will not be used in the REPL. |
| |
| .SH V8 OPTIONS |
| |
| --use_strict (enforce strict mode) |
| type: bool default: false |
| --es_staging (enable all completed harmony features) |
| type: bool default: false |
| --harmony (enable all completed harmony features) |
| type: bool default: false |
| --harmony_shipping (enable all shipped harmony fetaures) |
| type: bool default: true |
| --harmony_modules (enable "harmony modules (implies block scoping)" (in progress)) |
| type: bool default: false |
| --harmony_arrays (enable "harmony array methods" (in progress)) |
| type: bool default: false |
| --harmony_array_includes (enable "harmony Array.prototype.includes" (in progress)) |
| type: bool default: false |
| --harmony_regexps (enable "harmony regular expression extensions" (in progress)) |
| type: bool default: false |
| --harmony_arrow_functions (enable "harmony arrow functions" (in progress)) |
| type: bool default: false |
| --harmony_proxies (enable "harmony proxies" (in progress)) |
| type: bool default: false |
| --harmony_sloppy (enable "harmony features in sloppy mode" (in progress)) |
| type: bool default: false |
| --harmony_unicode (enable "harmony unicode escapes" (in progress)) |
| type: bool default: false |
| --harmony_tostring (enable "harmony toString") |
| type: bool default: false |
| --harmony_numeric_literals (enable "harmony numeric literals") |
| type: bool default: true |
| --harmony_strings (enable "harmony string methods") |
| type: bool default: true |
| --harmony_scoping (enable "harmony block scoping") |
| type: bool default: true |
| --harmony_classes (enable "harmony classes (implies block scoping & object literal extension)") |
| type: bool default: true |
| --harmony_object_literals (enable "harmony object literal extensions") |
| type: bool default: true |
| --harmony_templates (enable "harmony template literals") |
| type: bool default: true |
| --compiled_keyed_generic_loads (use optimizing compiler to generate keyed generic load stubs) |
| type: bool default: false |
| --pretenuring_call_new (pretenure call new) |
| type: bool default: false |
| --allocation_site_pretenuring (pretenure with allocation sites) |
| type: bool default: true |
| --trace_pretenuring (trace pretenuring decisions of HAllocate instructions) |
| type: bool default: false |
| --trace_pretenuring_statistics (trace allocation site pretenuring statistics) |
| type: bool default: false |
| --track_fields (track fields with only smi values) |
| type: bool default: true |
| --track_double_fields (track fields with double values) |
| type: bool default: true |
| --track_heap_object_fields (track fields with heap values) |
| type: bool default: true |
| --track_computed_fields (track computed boilerplate fields) |
| type: bool default: true |
| --track_field_types (track field types) |
| type: bool default: true |
| --smi_binop (support smi representation in binary operations) |
| type: bool default: true |
| --vector_ics (support vector-based ics) |
| type: bool default: false |
| --optimize_for_size (Enables optimizations which favor memory size over execution speed.) |
| type: bool default: false |
| --unbox_double_arrays (automatically unbox arrays of doubles) |
| type: bool default: true |
| --string_slices (use string slices) |
| type: bool default: true |
| --crankshaft (use crankshaft) |
| type: bool default: true |
| --hydrogen_filter (optimization filter) |
| type: string default: * |
| --use_gvn (use hydrogen global value numbering) |
| type: bool default: true |
| --gvn_iterations (maximum number of GVN fix-point iterations) |
| type: int default: 3 |
| --use_canonicalizing (use hydrogen instruction canonicalizing) |
| type: bool default: true |
| --use_inlining (use function inlining) |
| type: bool default: true |
| --use_escape_analysis (use hydrogen escape analysis) |
| type: bool default: true |
| --use_allocation_folding (use allocation folding) |
| type: bool default: true |
| --use_local_allocation_folding (only fold in basic blocks) |
| type: bool default: false |
| --use_write_barrier_elimination (eliminate write barriers targeting allocations in optimized code) |
| type: bool default: true |
| --max_inlining_levels (maximum number of inlining levels) |
| type: int default: 5 |
| --max_inlined_source_size (maximum source size in bytes considered for a single inlining) |
| type: int default: 600 |
| --max_inlined_nodes (maximum number of AST nodes considered for a single inlining) |
| type: int default: 196 |
| --max_inlined_nodes_cumulative (maximum cumulative number of AST nodes considered for inlining) |
| type: int default: 400 |
| --loop_invariant_code_motion (loop invariant code motion) |
| type: bool default: true |
| --fast_math (faster (but maybe less accurate) math functions) |
| type: bool default: true |
| --collect_megamorphic_maps_from_stub_cache (crankshaft harvests type feedback from stub cache) |
| type: bool default: true |
| --hydrogen_stats (print statistics for hydrogen) |
| type: bool default: false |
| --trace_check_elimination (trace check elimination phase) |
| type: bool default: false |
| --trace_hydrogen (trace generated hydrogen to file) |
| type: bool default: false |
| --trace_hydrogen_filter (hydrogen tracing filter) |
| type: string default: * |
| --trace_hydrogen_stubs (trace generated hydrogen for stubs) |
| type: bool default: false |
| --trace_hydrogen_file (trace hydrogen to given file name) |
| type: string default: NULL |
| --trace_phase (trace generated IR for specified phases) |
| type: string default: HLZ |
| --trace_inlining (trace inlining decisions) |
| type: bool default: false |
| --trace_load_elimination (trace load elimination) |
| type: bool default: false |
| --trace_store_elimination (trace store elimination) |
| type: bool default: false |
| --trace_alloc (trace register allocator) |
| type: bool default: false |
| --trace_all_uses (trace all use positions) |
| type: bool default: false |
| --trace_range (trace range analysis) |
| type: bool default: false |
| --trace_gvn (trace global value numbering) |
| type: bool default: false |
| --trace_representation (trace representation types) |
| type: bool default: false |
| --trace_removable_simulates (trace removable simulates) |
| type: bool default: false |
| --trace_escape_analysis (trace hydrogen escape analysis) |
| type: bool default: false |
| --trace_allocation_folding (trace allocation folding) |
| type: bool default: false |
| --trace_track_allocation_sites (trace the tracking of allocation sites) |
| type: bool default: false |
| --trace_migration (trace object migration) |
| type: bool default: false |
| --trace_generalization (trace map generalization) |
| type: bool default: false |
| --stress_pointer_maps (pointer map for every instruction) |
| type: bool default: false |
| --stress_environments (environment for every instruction) |
| type: bool default: false |
| --deopt_every_n_times (deoptimize every n times a deopt point is passed) |
| type: int default: 0 |
| --deopt_every_n_garbage_collections (deoptimize every n garbage collections) |
| type: int default: 0 |
| --print_deopt_stress (print number of possible deopt points) |
| type: bool default: false |
| --trap_on_deopt (put a break point before deoptimizing) |
| type: bool default: false |
| --trap_on_stub_deopt (put a break point before deoptimizing a stub) |
| type: bool default: false |
| --deoptimize_uncommon_cases (deoptimize uncommon cases) |
| type: bool default: true |
| --polymorphic_inlining (polymorphic inlining) |
| type: bool default: true |
| --use_osr (use on-stack replacement) |
| type: bool default: true |
| --array_bounds_checks_elimination (perform array bounds checks elimination) |
| type: bool default: true |
| --trace_bce (trace array bounds check elimination) |
| type: bool default: false |
| --array_bounds_checks_hoisting (perform array bounds checks hoisting) |
| type: bool default: false |
| --array_index_dehoisting (perform array index dehoisting) |
| type: bool default: true |
| --analyze_environment_liveness (analyze liveness of environment slots and zap dead values) |
| type: bool default: true |
| --load_elimination (use load elimination) |
| type: bool default: true |
| --check_elimination (use check elimination) |
| type: bool default: true |
| --store_elimination (use store elimination) |
| type: bool default: false |
| --dead_code_elimination (use dead code elimination) |
| type: bool default: true |
| --fold_constants (use constant folding) |
| type: bool default: true |
| --trace_dead_code_elimination (trace dead code elimination) |
| type: bool default: false |
| --unreachable_code_elimination (eliminate unreachable code) |
| type: bool default: true |
| --trace_osr (trace on-stack replacement) |
| type: bool default: false |
| --stress_runs (number of stress runs) |
| type: int default: 0 |
| --lookup_sample_by_shared (when picking a function to optimize, watch for shared function info, not JSFunction itself) |
| type: bool default: true |
| --cache_optimized_code (cache optimized code for closures) |
| type: bool default: true |
| --flush_optimized_code_cache (flushes the cache of optimized code for closures on every GC) |
| type: bool default: true |
| --inline_construct (inline constructor calls) |
| type: bool default: true |
| --inline_arguments (inline functions with arguments object) |
| type: bool default: true |
| --inline_accessors (inline JavaScript accessors) |
| type: bool default: true |
| --escape_analysis_iterations (maximum number of escape analysis fix-point iterations) |
| type: int default: 2 |
| --optimize_for_in (optimize functions containing for-in loops) |
| type: bool default: true |
| --concurrent_recompilation (optimizing hot functions asynchronously on a separate thread) |
| type: bool default: true |
| --job_based_recompilation (post tasks to v8::Platform instead of using a thread for concurrent recompilation) |
| type: bool default: false |
| --trace_concurrent_recompilation (track concurrent recompilation) |
| type: bool default: false |
| --concurrent_recompilation_queue_length (the length of the concurrent compilation queue) |
| type: int default: 8 |
| --concurrent_recompilation_delay (artificial compilation delay in ms) |
| type: int default: 0 |
| --block_concurrent_recompilation (block queued jobs until released) |
| type: bool default: false |
| --concurrent_osr (concurrent on-stack replacement) |
| type: bool default: true |
| --omit_map_checks_for_leaf_maps (do not emit check maps for constant values that have a leaf map, deoptimize the optimized code if the layout of the maps changes.) |
| type: bool default: true |
| --turbo_filter (optimization filter for TurboFan compiler) |
| type: string default: ~ |
| --trace_turbo (trace generated TurboFan IR) |
| type: bool default: false |
| --trace_turbo_graph (trace generated TurboFan graphs) |
| type: bool default: false |
| --trace_turbo_cfg_file (trace turbo cfg graph (for C1 visualizer) to a given file name) |
| type: string default: NULL |
| --trace_turbo_types (trace TurboFan's types) |
| type: bool default: true |
| --trace_turbo_scheduler (trace TurboFan's scheduler) |
| type: bool default: false |
| --trace_turbo_reduction (trace TurboFan's various reducers) |
| type: bool default: false |
| --trace_turbo_jt (trace TurboFan's jump threading) |
| type: bool default: false |
| --turbo_asm (enable TurboFan for asm.js code) |
| type: bool default: true |
| --turbo_verify (verify TurboFan graphs at each phase) |
| type: bool default: false |
| --turbo_stats (print TurboFan statistics) |
| type: bool default: false |
| --turbo_types (use typed lowering in TurboFan) |
| type: bool default: true |
| --turbo_source_positions (track source code positions when building TurboFan IR) |
| type: bool default: false |
| --context_specialization (enable context specialization in TurboFan) |
| type: bool default: false |
| --turbo_deoptimization (enable deoptimization in TurboFan) |
| type: bool default: false |
| --turbo_inlining (enable inlining in TurboFan) |
| type: bool default: false |
| --turbo_inlining_intrinsics (enable inlining of intrinsics in TurboFan) |
| type: bool default: false |
| --trace_turbo_inlining (trace TurboFan inlining) |
| type: bool default: false |
| --loop_assignment_analysis (perform loop assignment analysis) |
| type: bool default: true |
| --turbo_profiling (enable profiling in TurboFan) |
| type: bool default: false |
| --turbo_reuse_spill_slots (reuse spill slots in TurboFan) |
| type: bool default: true |
| --turbo_delay_ssa_decon (delay ssa deconstruction in TurboFan register allocator) |
| type: bool default: false |
| --turbo_move_optimization (optimize gap moves in TurboFan) |
| type: bool default: true |
| --turbo_jt (enable jump threading) |
| type: bool default: true |
| --typed_array_max_size_in_heap (threshold for in-heap typed array) |
| type: int default: 64 |
| --frame_count (number of stack frames inspected by the profiler) |
| type: int default: 1 |
| --interrupt_budget (execution budget before interrupt is triggered) |
| type: int default: 6144 |
| --type_info_threshold (percentage of ICs that must have type info to allow optimization) |
| type: int default: 25 |
| --generic_ic_threshold (max percentage of megamorphic/generic ICs to allow optimization) |
| type: int default: 30 |
| --self_opt_count (call count before self-optimization) |
| type: int default: 130 |
| --trace_opt_verbose (extra verbose compilation tracing) |
| type: bool default: false |
| --debug_code (generate extra code (assertions) for debugging) |
| type: bool default: false |
| --code_comments (emit comments in code disassembly) |
| type: bool default: false |
| --enable_sse3 (enable use of SSE3 instructions if available) |
| type: bool default: true |
| --enable_sse4_1 (enable use of SSE4.1 instructions if available) |
| type: bool default: true |
| --enable_sahf (enable use of SAHF instruction if available (X64 only)) |
| type: bool default: true |
| --enable_avx (enable use of AVX instructions if available) |
| type: bool default: true |
| --enable_fma3 (enable use of FMA3 instructions if available) |
| type: bool default: true |
| --enable_vfp3 (enable use of VFP3 instructions if available) |
| type: bool default: true |
| --enable_armv7 (enable use of ARMv7 instructions if available (ARM only)) |
| type: bool default: true |
| --enable_armv8 (enable use of ARMv8 instructions if available (ARM 32-bit only)) |
| type: bool default: true |
| --enable_neon (enable use of NEON instructions if available (ARM only)) |
| type: bool default: true |
| --enable_sudiv (enable use of SDIV and UDIV instructions if available (ARM only)) |
| type: bool default: true |
| --enable_mls (enable use of MLS instructions if available (ARM only)) |
| type: bool default: true |
| --enable_movw_movt (enable loading 32-bit constant by means of movw/movt instruction pairs (ARM only)) |
| type: bool default: false |
| --enable_unaligned_accesses (enable unaligned accesses for ARMv7 (ARM only)) |
| type: bool default: true |
| --enable_32dregs (enable use of d16-d31 registers on ARM - this requires VFP3) |
| type: bool default: true |
| --enable_vldr_imm (enable use of constant pools for double immediate (ARM only)) |
| type: bool default: false |
| --force_long_branches (force all emitted branches to be in long mode (MIPS only)) |
| type: bool default: false |
| --expose_natives_as (expose natives in global object) |
| type: string default: NULL |
| --expose_debug_as (expose debug in global object) |
| type: string default: NULL |
| --expose_free_buffer (expose freeBuffer extension) |
| type: bool default: false |
| --expose_gc (expose gc extension) |
| type: bool default: false |
| --expose_gc_as (expose gc extension under the specified name) |
| type: string default: NULL |
| --expose_externalize_string (expose externalize string extension) |
| type: bool default: false |
| --expose_trigger_failure (expose trigger-failure extension) |
| type: bool default: false |
| --stack_trace_limit (number of stack frames to capture) |
| type: int default: 10 |
| --builtins_in_stack_traces (show built-in functions in stack traces) |
| type: bool default: false |
| --disable_native_files (disable builtin natives files) |
| type: bool default: false |
| --inline_new (use fast inline allocation) |
| type: bool default: true |
| --trace_codegen (print name of functions for which code is generated) |
| type: bool default: false |
| --trace (trace function calls) |
| type: bool default: false |
| --mask_constants_with_cookie (use random jit cookie to mask large constants) |
| type: bool default: true |
| --lazy (use lazy compilation) |
| type: bool default: true |
| --trace_opt (trace lazy optimization) |
| type: bool default: false |
| --trace_opt_stats (trace lazy optimization statistics) |
| type: bool default: false |
| --opt (use adaptive optimizations) |
| type: bool default: true |
| --always_opt (always try to optimize functions) |
| type: bool default: false |
| --always_osr (always try to OSR functions) |
| type: bool default: false |
| --prepare_always_opt (prepare for turning on always opt) |
| type: bool default: false |
| --trace_deopt (trace optimize function deoptimization) |
| type: bool default: false |
| --trace_stub_failures (trace deoptimization of generated code stubs) |
| type: bool default: false |
| --serialize_toplevel (enable caching of toplevel scripts) |
| type: bool default: true |
| --serialize_inner (enable caching of inner functions) |
| type: bool default: false |
| --trace_serializer (print code serializer trace) |
| type: bool default: false |
| --min_preparse_length (minimum length for automatic enable preparsing) |
| type: int default: 1024 |
| --max_opt_count (maximum number of optimization attempts before giving up.) |
| type: int default: 10 |
| --compilation_cache (enable compilation cache) |
| type: bool default: true |
| --cache_prototype_transitions (cache prototype transitions) |
| type: bool default: true |
| --cpu_profiler_sampling_interval (CPU profiler sampling interval in microseconds) |
| type: int default: 1000 |
| --trace_debug_json (trace debugging JSON request/response) |
| type: bool default: false |
| --trace_js_array_abuse (trace out-of-bounds accesses to JS arrays) |
| type: bool default: false |
| --trace_external_array_abuse (trace out-of-bounds-accesses to external arrays) |
| type: bool default: false |
| --trace_array_abuse (trace out-of-bounds accesses to all arrays) |
| type: bool default: false |
| --enable_liveedit (enable liveedit experimental feature) |
| type: bool default: true |
| --hard_abort (abort by crashing) |
| type: bool default: true |
| --stack_size (default size of stack region v8 is allowed to use (in kBytes)) |
| type: int default: 984 |
| --max_stack_trace_source_length (maximum length of function source code printed in a stack trace.) |
| type: int default: 300 |
| --always_inline_smi_code (always inline smi code in non-opt code) |
| type: bool default: false |
| --min_semi_space_size (min size of a semi-space (in MBytes), the new space consists of twosemi-spaces) |
| type: int default: 0 |
| --target_semi_space_size (target size of a semi-space (in MBytes) before triggering a GC) |
| type: int default: 0 |
| --max_semi_space_size (max size of a semi-space (in MBytes), the new space consists of twosemi-spaces) |
| type: int default: 0 |
| --semi_space_growth_factor (factor by which to grow the new space) |
| type: int default: 2 |
| --experimental_new_space_growth_heuristic (Grow the new space based on the percentage of survivors instead of their absolute value.) |
| type: bool default: false |
| --max_old_space_size (max size of the old space (in Mbytes)) |
| type: int default: 0 |
| --initial_old_space_size (initial old space size (in Mbytes)) |
| type: int default: 0 |
| --max_executable_size (max size of executable memory (in Mbytes)) |
| type: int default: 0 |
| --gc_global (always perform global GCs) |
| type: bool default: false |
| --gc_interval (garbage collect after <n> allocations) |
| type: int default: -1 |
| --trace_gc (print one trace line following each garbage collection) |
| type: bool default: false |
| --trace_gc_nvp (print one detailed trace line in name=value format after each garbage collection) |
| type: bool default: false |
| --trace_gc_ignore_scavenger (do not print trace line after scavenger collection) |
| type: bool default: false |
| --trace_idle_notification (print one trace line following each idle notification) |
| type: bool default: false |
| --trace_idle_notification_verbose (prints the heap state used by the idle notification) |
| type: bool default: false |
| --print_cumulative_gc_stat (print cumulative GC statistics in name=value format on exit) |
| type: bool default: false |
| --print_max_heap_committed (print statistics of the maximum memory committed for the heap in name=value format on exit) |
| type: bool default: false |
| --trace_gc_verbose (print more details following each garbage collection) |
| type: bool default: false |
| --trace_fragmentation (report fragmentation for old pointer and data pages) |
| type: bool default: false |
| --collect_maps (garbage collect maps from which no objects can be reached) |
| type: bool default: true |
| --weak_embedded_maps_in_optimized_code (make maps embedded in optimized code weak) |
| type: bool default: true |
| --weak_embedded_objects_in_optimized_code (make objects embedded in optimized code weak) |
| type: bool default: true |
| --flush_code (flush code that we expect not to use again (during full gc)) |
| type: bool default: true |
| --flush_code_incrementally (flush code that we expect not to use again (incrementally)) |
| type: bool default: true |
| --trace_code_flushing (trace code flushing progress) |
| type: bool default: false |
| --age_code (track un-executed functions to age code and flush only old code (required for code flushing)) |
| type: bool default: true |
| --incremental_marking (use incremental marking) |
| type: bool default: true |
| --incremental_marking_steps (do incremental marking steps) |
| type: bool default: true |
| --concurrent_sweeping (use concurrent sweeping) |
| type: bool default: true |
| --trace_incremental_marking (trace progress of the incremental marking) |
| type: bool default: false |
| --track_gc_object_stats (track object counts and memory usage) |
| type: bool default: false |
| --heap_profiler_trace_objects (Dump heap object allocations/movements/size_updates) |
| type: bool default: false |
| --use_idle_notification (Use idle notification to reduce memory footprint.) |
| type: bool default: true |
| --use_ic (use inline caching) |
| type: bool default: true |
| --trace_ic (trace inline cache state transitions) |
| type: bool default: false |
| --native_code_counters (generate extra code for manipulating stats counters) |
| type: bool default: false |
| --always_compact (Perform compaction on every full GC) |
| type: bool default: false |
| --never_compact (Never perform compaction on full GC - testing only) |
| type: bool default: false |
| --compact_code_space (Compact code space on full non-incremental collections) |
| type: bool default: true |
| --incremental_code_compaction (Compact code space on full incremental collections) |
| type: bool default: true |
| --cleanup_code_caches_at_gc (Flush inline caches prior to mark compact collection and flush code caches in maps during mark compact cycle.) |
| type: bool default: true |
| --use_marking_progress_bar (Use a progress bar to scan large objects in increments when incremental marking is active.) |
| type: bool default: true |
| --zap_code_space (Zap free memory in code space with 0xCC while sweeping.) |
| type: bool default: true |
| --random_seed (Default seed for initializing random generator (0, the default, means to use system random).) |
| type: int default: 0 |
| --trace_weak_arrays (trace WeakFixedArray usage) |
| type: bool default: false |
| --track_prototype_users (keep track of which maps refer to a given prototype object) |
| type: bool default: false |
| --use_verbose_printer (allows verbose printing) |
| type: bool default: true |
| --allow_natives_syntax (allow natives syntax) |
| type: bool default: false |
| --trace_parse (trace parsing and preparsing) |
| type: bool default: false |
| --trace_sim (Trace simulator execution) |
| type: bool default: false |
| --debug_sim (Enable debugging the simulator) |
| type: bool default: false |
| --check_icache (Check icache flushes in ARM and MIPS simulator) |
| type: bool default: false |
| --stop_sim_at (Simulator stop after x number of instructions) |
| type: int default: 0 |
| --sim_stack_alignment (Stack alingment in bytes in simulator (4 or 8, 8 is default)) |
| type: int default: 8 |
| --sim_stack_size (Stack size of the ARM64 and MIPS64 simulator in kBytes (default is 2 MB)) |
| type: int default: 2048 |
| --log_regs_modified (When logging register values, only print modified registers.) |
| type: bool default: true |
| --log_colour (When logging, try to use coloured output.) |
| type: bool default: true |
| --ignore_asm_unimplemented_break (Don't break for ASM_UNIMPLEMENTED_BREAK macros.) |
| type: bool default: false |
| --trace_sim_messages (Trace simulator debug messages. Implied by --trace-sim.) |
| type: bool default: false |
| --stack_trace_on_illegal (print stack trace when an illegal exception is thrown) |
| type: bool default: false |
| --abort_on_uncaught_exception (abort program (dump core) when an uncaught exception is thrown) |
| type: bool default: false |
| --randomize_hashes (randomize hashes to avoid predictable hash collisions (with snapshots this option cannot override the baked-in seed)) |
| type: bool default: true |
| --hash_seed (Fixed seed to use to hash property keys (0 means random)(with snapshots this option cannot override the baked-in seed)) |
| type: int default: 0 |
| --profile_deserialization (Print the time it takes to deserialize the snapshot.) |
| type: bool default: false |
| --regexp_optimization (generate optimized regexp code) |
| type: bool default: true |
| --testing_bool_flag (testing_bool_flag) |
| type: bool default: true |
| --testing_maybe_bool_flag (testing_maybe_bool_flag) |
| type: maybe_bool default: unset |
| --testing_int_flag (testing_int_flag) |
| type: int default: 13 |
| --testing_float_flag (float-flag) |
| type: float default: 2.5 |
| --testing_string_flag (string-flag) |
| type: string default: Hello, world! |
| --testing_prng_seed (Seed used for threading test randomness) |
| type: int default: 42 |
| --testing_serialization_file (file in which to serialize heap) |
| type: string default: /tmp/serdes |
| --startup_blob (Write V8 startup blob file. (mksnapshot only)) |
| type: string default: NULL |
| --profile_hydrogen_code_stub_compilation (Print the time it takes to lazily compile hydrogen code stubs.) |
| type: bool default: false |
| --predictable (enable predictable mode) |
| type: bool default: false |
| --help (Print usage message, including flags, on console) |
| type: bool default: true |
| --dump_counters (Dump counters on exit) |
| type: bool default: false |
| --debugger (Enable JavaScript debugger) |
| type: bool default: false |
| --map_counters (Map counters to a file) |
| type: string default: |
| --js_arguments (Pass all remaining arguments to the script. Alias for "--".) |
| type: arguments default: |
| --gdbjit (enable GDBJIT interface (disables compacting GC)) |
| type: bool default: false |
| --gdbjit_full (enable GDBJIT interface for all code objects) |
| type: bool default: false |
| --gdbjit_dump (dump elf objects with debug info to disk) |
| type: bool default: false |
| --gdbjit_dump_filter (dump only objects containing this substring) |
| type: string default: |
| --force_marking_deque_overflows (force overflows of marking deque by reducing it's size to 64 words) |
| type: bool default: false |
| --stress_compaction (stress the GC compactor to flush out bugs (implies --force_marking_deque_overflows)) |
| type: bool default: false |
| --log (Minimal logging (no API, code, GC, suspect, or handles samples).) |
| type: bool default: false |
| --log_all (Log all events to the log file.) |
| type: bool default: false |
| --log_api (Log API events to the log file.) |
| type: bool default: false |
| --log_code (Log code events to the log file without profiling.) |
| type: bool default: false |
| --log_gc (Log heap samples on garbage collection for the hp2ps tool.) |
| type: bool default: false |
| --log_handles (Log global handle events.) |
| type: bool default: false |
| --log_snapshot_positions (log positions of (de)serialized objects in the snapshot.) |
| type: bool default: false |
| --log_suspect (Log suspect operations.) |
| type: bool default: false |
| --prof (Log statistical profiling information (implies --log-code).) |
| type: bool default: false |
| --prof_browser_mode (Used with --prof, turns on browser-compatible mode for profiling.) |
| type: bool default: true |
| --log_regexp (Log regular expression execution.) |
| type: bool default: false |
| --logfile (Specify the name of the log file.) |
| type: string default: v8.log |
| --logfile_per_isolate (Separate log files for each isolate.) |
| type: bool default: true |
| --ll_prof (Enable low-level linux profiler.) |
| type: bool default: false |
| --perf_basic_prof (Enable perf linux profiler (basic support).) |
| type: bool default: false |
| --perf_jit_prof (Enable perf linux profiler (experimental annotate support).) |
| type: bool default: false |
| --gc_fake_mmap (Specify the name of the file for fake gc mmap used in ll_prof) |
| type: string default: /tmp/__v8_gc__ |
| --log_internal_timer_events (Time internal events.) |
| type: bool default: false |
| --log_timer_events (Time events including external callbacks.) |
| type: bool default: false |
| --log_instruction_stats (Log AArch64 instruction statistics.) |
| type: bool default: false |
| --log_instruction_file (AArch64 instruction statistics log file.) |
| type: string default: arm64_inst.csv |
| --log_instruction_period (AArch64 instruction statistics logging period.) |
| type: int default: 4194304 |
| --redirect_code_traces (output deopt information and disassembly into file code-<pid>-<isolate id>.asm) |
| type: bool default: false |
| --redirect_code_traces_to (output deopt information and disassembly into the given file) |
| type: string default: NULL |
| --hydrogen_track_positions (track source code positions when building IR) |
| type: bool default: false |
| --trace_elements_transitions (trace elements transitions) |
| type: bool default: false |
| --trace_creation_allocation_sites (trace the creation of allocation sites) |
| type: bool default: false |
| --print_code_stubs (print code stubs) |
| type: bool default: false |
| --test_secondary_stub_cache (test secondary stub cache by disabling the primary one) |
| type: bool default: false |
| --test_primary_stub_cache (test primary stub cache by disabling the secondary one) |
| type: bool default: false |
| --print_code (print generated code) |
| type: bool default: false |
| --print_opt_code (print optimized code) |
| type: bool default: false |
| --print_unopt_code (print unoptimized code before printing optimized code based on it) |
| type: bool default: false |
| --print_code_verbose (print more information for code) |
| type: bool default: false |
| --print_builtin_code (print generated code for builtins) |
| type: bool default: false |
| --sodium (print generated code output suitable for use with the Sodium code viewer) |
| type: bool default: false |
| --print_all_code (enable all flags related to printing code) |
| type: bool default: false |
| |
| .SH RESOURCES AND DOCUMENTATION |
| |
| See the website for documentation http://iojs.org/ |
| |
| Mailing list: http://groups.google.com/group/nodejs |
| |
| IRC: irc.freenode.net #io.js |