v8  3.11.10(node0.8.26)
V8 is Google's open source JavaScript engine
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Macros Pages
shell.cc
Go to the documentation of this file.
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 #include <v8.h>
29 #include <assert.h>
30 #include <fcntl.h>
31 #include <string.h>
32 #include <stdio.h>
33 #include <stdlib.h>
34 
35 #ifdef COMPRESS_STARTUP_DATA_BZ2
36 #error Using compressed startup data is not supported for this sample
37 #endif
38 
49 void RunShell(v8::Handle<v8::Context> context);
50 int RunMain(int argc, char* argv[]);
53  bool print_result,
54  bool report_exceptions);
61 void ReportException(v8::TryCatch* handler);
62 
63 
64 static bool run_shell;
65 
66 
67 int main(int argc, char* argv[]) {
68  v8::V8::SetFlagsFromCommandLine(&argc, argv, true);
69  run_shell = (argc == 1);
70  int result;
71  {
72  v8::HandleScope handle_scope;
74  if (context.IsEmpty()) {
75  printf("Error creating context\n");
76  return 1;
77  }
78  context->Enter();
79  result = RunMain(argc, argv);
80  if (run_shell) RunShell(context);
81  context->Exit();
82  context.Dispose();
83  }
85  return result;
86 }
87 
88 
89 // Extracts a C string from a V8 Utf8Value.
90 const char* ToCString(const v8::String::Utf8Value& value) {
91  return *value ? *value : "<string conversion failed>";
92 }
93 
94 
95 // Creates a new execution environment containing the built-in
96 // functions.
98  // Create a template for the global object.
100  // Bind the global 'print' function to the C++ Print callback.
102  // Bind the global 'read' function to the C++ Read callback.
104  // Bind the global 'load' function to the C++ Load callback.
106  // Bind the 'quit' function
108  // Bind the 'version' function
110 
111  return v8::Context::New(NULL, global);
112 }
113 
114 
115 // The callback that is invoked by v8 whenever the JavaScript 'print'
116 // function is called. Prints its arguments on stdout separated by
117 // spaces and ending with a newline.
119  bool first = true;
120  for (int i = 0; i < args.Length(); i++) {
121  v8::HandleScope handle_scope;
122  if (first) {
123  first = false;
124  } else {
125  printf(" ");
126  }
127  v8::String::Utf8Value str(args[i]);
128  const char* cstr = ToCString(str);
129  printf("%s", cstr);
130  }
131  printf("\n");
132  fflush(stdout);
133  return v8::Undefined();
134 }
135 
136 
137 // The callback that is invoked by v8 whenever the JavaScript 'read'
138 // function is called. This function loads the content of the file named in
139 // the argument into a JavaScript string.
141  if (args.Length() != 1) {
142  return v8::ThrowException(v8::String::New("Bad parameters"));
143  }
144  v8::String::Utf8Value file(args[0]);
145  if (*file == NULL) {
146  return v8::ThrowException(v8::String::New("Error loading file"));
147  }
148  v8::Handle<v8::String> source = ReadFile(*file);
149  if (source.IsEmpty()) {
150  return v8::ThrowException(v8::String::New("Error loading file"));
151  }
152  return source;
153 }
154 
155 
156 // The callback that is invoked by v8 whenever the JavaScript 'load'
157 // function is called. Loads, compiles and executes its argument
158 // JavaScript file.
160  for (int i = 0; i < args.Length(); i++) {
161  v8::HandleScope handle_scope;
162  v8::String::Utf8Value file(args[i]);
163  if (*file == NULL) {
164  return v8::ThrowException(v8::String::New("Error loading file"));
165  }
166  v8::Handle<v8::String> source = ReadFile(*file);
167  if (source.IsEmpty()) {
168  return v8::ThrowException(v8::String::New("Error loading file"));
169  }
170  if (!ExecuteString(source, v8::String::New(*file), false, false)) {
171  return v8::ThrowException(v8::String::New("Error executing file"));
172  }
173  }
174  return v8::Undefined();
175 }
176 
177 
178 // The callback that is invoked by v8 whenever the JavaScript 'quit'
179 // function is called. Quits.
181  // If not arguments are given args[0] will yield undefined which
182  // converts to the integer value 0.
183  int exit_code = args[0]->Int32Value();
184  fflush(stdout);
185  fflush(stderr);
186  exit(exit_code);
187  return v8::Undefined();
188 }
189 
190 
193 }
194 
195 
196 // Reads a file into a v8 string.
198  FILE* file = fopen(name, "rb");
199  if (file == NULL) return v8::Handle<v8::String>();
200 
201  fseek(file, 0, SEEK_END);
202  int size = ftell(file);
203  rewind(file);
204 
205  char* chars = new char[size + 1];
206  chars[size] = '\0';
207  for (int i = 0; i < size;) {
208  int read = fread(&chars[i], 1, size - i, file);
209  i += read;
210  }
211  fclose(file);
212  v8::Handle<v8::String> result = v8::String::New(chars, size);
213  delete[] chars;
214  return result;
215 }
216 
217 
218 // Process remaining command line arguments and execute files
219 int RunMain(int argc, char* argv[]) {
220  for (int i = 1; i < argc; i++) {
221  const char* str = argv[i];
222  if (strcmp(str, "--shell") == 0) {
223  run_shell = true;
224  } else if (strcmp(str, "-f") == 0) {
225  // Ignore any -f flags for compatibility with the other stand-
226  // alone JavaScript engines.
227  continue;
228  } else if (strncmp(str, "--", 2) == 0) {
229  printf("Warning: unknown flag %s.\nTry --help for options\n", str);
230  } else if (strcmp(str, "-e") == 0 && i + 1 < argc) {
231  // Execute argument given to -e option directly.
232  v8::Handle<v8::String> file_name = v8::String::New("unnamed");
233  v8::Handle<v8::String> source = v8::String::New(argv[++i]);
234  if (!ExecuteString(source, file_name, false, true)) return 1;
235  } else {
236  // Use all other arguments as names of files to load and run.
237  v8::Handle<v8::String> file_name = v8::String::New(str);
238  v8::Handle<v8::String> source = ReadFile(str);
239  if (source.IsEmpty()) {
240  printf("Error reading '%s'\n", str);
241  continue;
242  }
243  if (!ExecuteString(source, file_name, false, true)) return 1;
244  }
245  }
246  return 0;
247 }
248 
249 
250 // The read-eval-execute loop of the shell.
252  printf("V8 version %s [sample shell]\n", v8::V8::GetVersion());
253  static const int kBufferSize = 256;
254  // Enter the execution environment before evaluating any code.
255  v8::Context::Scope context_scope(context);
257  while (true) {
258  char buffer[kBufferSize];
259  printf("> ");
260  char* str = fgets(buffer, kBufferSize, stdin);
261  if (str == NULL) break;
262  v8::HandleScope handle_scope;
263  ExecuteString(v8::String::New(str), name, true, true);
264  }
265  printf("\n");
266 }
267 
268 
269 // Executes a string within the current v8 context.
272  bool print_result,
273  bool report_exceptions) {
274  v8::HandleScope handle_scope;
275  v8::TryCatch try_catch;
276  v8::Handle<v8::Script> script = v8::Script::Compile(source, name);
277  if (script.IsEmpty()) {
278  // Print errors that happened during compilation.
279  if (report_exceptions)
280  ReportException(&try_catch);
281  return false;
282  } else {
283  v8::Handle<v8::Value> result = script->Run();
284  if (result.IsEmpty()) {
285  assert(try_catch.HasCaught());
286  // Print errors that happened during execution.
287  if (report_exceptions)
288  ReportException(&try_catch);
289  return false;
290  } else {
291  assert(!try_catch.HasCaught());
292  if (print_result && !result->IsUndefined()) {
293  // If all went well and the result wasn't undefined then print
294  // the returned value.
295  v8::String::Utf8Value str(result);
296  const char* cstr = ToCString(str);
297  printf("%s\n", cstr);
298  }
299  return true;
300  }
301  }
302 }
303 
304 
305 void ReportException(v8::TryCatch* try_catch) {
306  v8::HandleScope handle_scope;
307  v8::String::Utf8Value exception(try_catch->Exception());
308  const char* exception_string = ToCString(exception);
309  v8::Handle<v8::Message> message = try_catch->Message();
310  if (message.IsEmpty()) {
311  // V8 didn't provide any extra information about this error; just
312  // print the exception.
313  printf("%s\n", exception_string);
314  } else {
315  // Print (filename):(line number): (message).
316  v8::String::Utf8Value filename(message->GetScriptResourceName());
317  const char* filename_string = ToCString(filename);
318  int linenum = message->GetLineNumber();
319  printf("%s:%i: %s\n", filename_string, linenum, exception_string);
320  // Print line of source code.
321  v8::String::Utf8Value sourceline(message->GetSourceLine());
322  const char* sourceline_string = ToCString(sourceline);
323  printf("%s\n", sourceline_string);
324  // Print wavy underline (GetUnderline is deprecated).
325  int start = message->GetStartColumn();
326  for (int i = 0; i < start; i++) {
327  printf(" ");
328  }
329  int end = message->GetEndColumn();
330  for (int i = start; i < end; i++) {
331  printf("^");
332  }
333  printf("\n");
334  v8::String::Utf8Value stack_trace(try_catch->StackTrace());
335  if (stack_trace.length() > 0) {
336  const char* stack_trace_string = ToCString(stack_trace);
337  printf("%s\n", stack_trace_string);
338  }
339  }
340 }
int main(int argc, char *argv[])
Definition: shell.cc:67
v8::Handle< v8::Value > Print(const v8::Arguments &args)
Definition: shell.cc:118
static Local< Script > Compile(Handle< String > source, ScriptOrigin *origin=NULL, ScriptData *pre_data=NULL, Handle< String > script_data=Handle< String >())
Definition: api.cc:1560
static Local< FunctionTemplate > New(InvocationCallback callback=0, Handle< Value > data=Handle< Value >(), Handle< Signature > signature=Handle< Signature >())
Definition: api.cc:943
void Dispose()
Definition: v8.h:4065
Local< Value > Exception() const
Definition: api.cc:1712
bool HasCaught() const
Definition: api.cc:1695
value format" "after each garbage collection") DEFINE_bool(print_cumulative_gc_stat, false, "print cumulative GC statistics in name=value format on exit") DEFINE_bool(trace_gc_verbose, false, "print more details following each garbage collection") DEFINE_bool(trace_fragmentation, false, "report fragmentation for old pointer and data pages") DEFINE_bool(collect_maps, true, "garbage collect maps from which no objects can be reached") DEFINE_bool(flush_code, true, "flush code that we expect not to use again before full gc") DEFINE_bool(incremental_marking, true, "use incremental marking") DEFINE_bool(incremental_marking_steps, true, "do incremental marking steps") DEFINE_bool(trace_incremental_marking, false, "trace progress of the incremental marking") DEFINE_bool(use_idle_notification, true, "Use idle notification to reduce memory footprint.") DEFINE_bool(send_idle_notification, false, "Send idle notifcation between stress runs.") DEFINE_bool(use_ic, true, "use inline caching") DEFINE_bool(native_code_counters, false, "generate extra code for manipulating stats counters") DEFINE_bool(always_compact, false, "Perform compaction on every full GC") DEFINE_bool(lazy_sweeping, true, "Use lazy sweeping for old pointer and data spaces") DEFINE_bool(never_compact, false, "Never perform compaction on full GC-testing only") DEFINE_bool(compact_code_space, true, "Compact code space on full non-incremental collections") DEFINE_bool(cleanup_code_caches_at_gc, true, "Flush inline caches prior to mark compact collection and" "flush code caches in maps during mark compact cycle.") DEFINE_int(random_seed, 0, "Default seed for initializing random generator" "(0, the default, means to use system random).") DEFINE_bool(use_verbose_printer, true, "allows verbose printing") DEFINE_bool(allow_natives_syntax, false, "allow natives syntax") DEFINE_bool(trace_sim, false, "Trace simulator execution") DEFINE_bool(check_icache, false, "Check icache flushes in ARM and MIPS simulator") DEFINE_int(stop_sim_at, 0, "Simulator stop after x number of instructions") DEFINE_int(sim_stack_alignment, 8, "Stack alingment in bytes in simulator(4 or 8, 8 is default)") DEFINE_bool(trace_exception, false, "print stack trace when throwing exceptions") DEFINE_bool(preallocate_message_memory, false, "preallocate some memory to build stack traces.") DEFINE_bool(randomize_hashes, true, "randomize hashes to avoid predictable hash collisions" "(with snapshots this option cannot override the baked-in seed)") DEFINE_int(hash_seed, 0, "Fixed seed to use to hash property keys(0 means random)" "(with snapshots this option cannot override the baked-in seed)") DEFINE_bool(preemption, false, "activate a 100ms timer that switches between V8 threads") DEFINE_bool(regexp_optimization, true, "generate optimized regexp code") DEFINE_bool(testing_bool_flag, true, "testing_bool_flag") DEFINE_int(testing_int_flag, 13, "testing_int_flag") DEFINE_float(testing_float_flag, 2.5, "float-flag") DEFINE_string(testing_string_flag, "Hello, world!", "string-flag") DEFINE_int(testing_prng_seed, 42, "Seed used for threading test randomness") DEFINE_string(testing_serialization_file, "/tmp/serdes", "file in which to serialize heap") DEFINE_bool(help, false, "Print usage message, including flags, on console") DEFINE_bool(dump_counters, false, "Dump counters on exit") DEFINE_string(map_counters, "", "Map counters to a file") DEFINE_args(js_arguments, JSARGUMENTS_INIT, "Pass all remaining arguments to the script.Alias for\"--\".") DEFINE_bool(debug_compile_events, true,"Enable debugger compile events") DEFINE_bool(debug_script_collected_events, true,"Enable debugger script collected events") DEFINE_bool(gdbjit, false,"enable GDBJIT interface (disables compacting GC)") DEFINE_bool(gdbjit_full, false,"enable GDBJIT interface for all code objects") DEFINE_bool(gdbjit_dump, false,"dump elf objects with debug info to disk") DEFINE_string(gdbjit_dump_filter,"","dump only objects containing this substring") DEFINE_bool(force_marking_deque_overflows, false,"force overflows of marking deque by reducing it's size ""to 64 words") DEFINE_bool(stress_compaction, false,"stress the GC compactor to flush out bugs (implies ""--force_marking_deque_overflows)")#define FLAG DEFINE_bool(enable_slow_asserts, false,"enable asserts that are slow to execute") DEFINE_bool(trace_codegen, false,"print name of functions for which code is generated") DEFINE_bool(print_source, false,"pretty print source code") DEFINE_bool(print_builtin_source, false,"pretty print source code for builtins") DEFINE_bool(print_ast, false,"print source AST") DEFINE_bool(print_builtin_ast, false,"print source AST for builtins") DEFINE_string(stop_at,"","function name where to insert a breakpoint") DEFINE_bool(print_builtin_scopes, false,"print scopes for builtins") DEFINE_bool(print_scopes, false,"print scopes") DEFINE_bool(trace_contexts, false,"trace contexts operations") DEFINE_bool(gc_greedy, false,"perform GC prior to some allocations") DEFINE_bool(gc_verbose, false,"print stuff during garbage collection") DEFINE_bool(heap_stats, false,"report heap statistics before and after GC") DEFINE_bool(code_stats, false,"report code statistics after GC") DEFINE_bool(verify_heap, false,"verify heap pointers before and after GC") DEFINE_bool(print_handles, false,"report handles after GC") DEFINE_bool(print_global_handles, false,"report global handles after GC") DEFINE_bool(trace_ic, false,"trace inline cache state transitions") DEFINE_bool(print_interfaces, false,"print interfaces") DEFINE_bool(print_interface_details, false,"print interface inference details") DEFINE_int(print_interface_depth, 5,"depth for printing interfaces") DEFINE_bool(trace_normalization, false,"prints when objects are turned into dictionaries.") DEFINE_bool(trace_lazy, false,"trace lazy compilation") DEFINE_bool(collect_heap_spill_statistics, false,"report heap spill statistics along with heap_stats ""(requires heap_stats)") DEFINE_bool(trace_isolates, false,"trace isolate state changes") DEFINE_bool(log_state_changes, false,"Log state changes.") DEFINE_bool(regexp_possessive_quantifier, false,"enable possessive quantifier syntax for testing") DEFINE_bool(trace_regexp_bytecodes, false,"trace regexp bytecode execution") DEFINE_bool(trace_regexp_assembler, false,"trace regexp macro assembler calls.")#define FLAG DEFINE_bool(log, false,"Minimal logging (no API, code, GC, suspect, or handles samples).") DEFINE_bool(log_all, false,"Log all events to the log file.") DEFINE_bool(log_runtime, false,"Activate runtime system %Log call.") DEFINE_bool(log_api, false,"Log API events to the log file.") DEFINE_bool(log_code, false,"Log code events to the log file without profiling.") DEFINE_bool(log_gc, false,"Log heap samples on garbage collection for the hp2ps tool.") DEFINE_bool(log_handles, false,"Log global handle events.") DEFINE_bool(log_snapshot_positions, false,"log positions of (de)serialized objects in the snapshot.") DEFINE_bool(log_suspect, false,"Log suspect operations.") DEFINE_bool(prof, false,"Log statistical profiling information (implies --log-code).") DEFINE_bool(prof_auto, true,"Used with --prof, starts profiling automatically") DEFINE_bool(prof_lazy, false,"Used with --prof, only does sampling and logging"" when profiler is active (implies --noprof_auto).") DEFINE_bool(prof_browser_mode, true,"Used with --prof, turns on browser-compatible mode for profiling.") DEFINE_bool(log_regexp, false,"Log regular expression execution.") DEFINE_bool(sliding_state_window, false,"Update sliding state window counters.") DEFINE_string(logfile,"v8.log","Specify the name of the log file.") DEFINE_bool(ll_prof, false,"Enable low-level linux profiler.")#define FLAG DEFINE_bool(trace_elements_transitions, false,"trace elements transitions") DEFINE_bool(print_code_stubs, false,"print code stubs") DEFINE_bool(test_secondary_stub_cache, false,"test secondary stub cache by disabling the primary one") DEFINE_bool(test_primary_stub_cache, false,"test primary stub cache by disabling the secondary one") DEFINE_bool(print_code, false,"print generated code") DEFINE_bool(print_opt_code, false,"print optimized code") DEFINE_bool(print_unopt_code, false,"print unoptimized code before ""printing optimized code based on it") DEFINE_bool(print_code_verbose, false,"print more information for code") DEFINE_bool(print_builtin_code, false,"print generated code for builtins")#43"/Users/thlorenz/dev/dx/v8-perf/build/v8/src/flags.cc"2#define FLAG_MODE_DEFINE_DEFAULTS#1"/Users/thlorenz/dev/dx/v8-perf/build/v8/src/flag-definitions.h"1#define FLAG_FULL(ftype, ctype, nam, def, cmt)#define FLAG_READONLY(ftype, ctype, nam, def, cmt)#define DEFINE_implication(whenflag, thenflag)#define DEFINE_bool(nam, def, cmt)#define DEFINE_int(nam, def, cmt)#define DEFINE_float(nam, def, cmt)#define DEFINE_string(nam, def, cmt)#define DEFINE_args(nam, def, cmt)#define FLAG DEFINE_bool(use_strict, false,"enforce strict mode") DEFINE_bool(es5_readonly, false,"activate correct semantics for inheriting readonliness") DEFINE_bool(es52_globals, false,"activate new semantics for global var declarations") DEFINE_bool(harmony_typeof, false,"enable harmony semantics for typeof") DEFINE_bool(harmony_scoping, false,"enable harmony block scoping") DEFINE_bool(harmony_modules, false,"enable harmony modules (implies block scoping)") DEFINE_bool(harmony_proxies, false,"enable harmony proxies") DEFINE_bool(harmony_collections, false,"enable harmony collections (sets, maps, and weak maps)") DEFINE_bool(harmony, false,"enable all harmony features (except typeof)") DEFINE_implication(harmony, harmony_scoping) DEFINE_implication(harmony, harmony_modules) DEFINE_implication(harmony, harmony_proxies) DEFINE_implication(harmony, harmony_collections) DEFINE_implication(harmony_modules, harmony_scoping) DEFINE_bool(packed_arrays, false,"optimizes arrays that have no holes") DEFINE_bool(smi_only_arrays, true,"tracks arrays with only smi values") DEFINE_bool(clever_optimizations, true,"Optimize object size, Array shift, DOM strings and string +") DEFINE_bool(unbox_double_arrays, true,"automatically unbox arrays of doubles") DEFINE_bool(string_slices, true,"use string slices") DEFINE_bool(crankshaft, true,"use crankshaft") DEFINE_string(hydrogen_filter,"","optimization filter") DEFINE_bool(use_range, true,"use hydrogen range analysis") DEFINE_bool(eliminate_dead_phis, true,"eliminate dead phis") DEFINE_bool(use_gvn, true,"use hydrogen global value numbering") DEFINE_bool(use_canonicalizing, true,"use hydrogen instruction canonicalizing") DEFINE_bool(use_inlining, true,"use function inlining") DEFINE_int(max_inlined_source_size, 600,"maximum source size in bytes considered for a single inlining") DEFINE_int(max_inlined_nodes, 196,"maximum number of AST nodes considered for a single inlining") DEFINE_int(max_inlined_nodes_cumulative, 196,"maximum cumulative number of AST nodes considered for inlining") DEFINE_bool(loop_invariant_code_motion, true,"loop invariant code motion") DEFINE_bool(collect_megamorphic_maps_from_stub_cache, true,"crankshaft harvests type feedback from stub cache") DEFINE_bool(hydrogen_stats, false,"print statistics for hydrogen") DEFINE_bool(trace_hydrogen, false,"trace generated hydrogen to file") DEFINE_string(trace_phase,"Z","trace generated IR for specified phases") DEFINE_bool(trace_inlining, false,"trace inlining decisions") DEFINE_bool(trace_alloc, false,"trace register allocator") DEFINE_bool(trace_all_uses, false,"trace all use positions") DEFINE_bool(trace_range, false,"trace range analysis") DEFINE_bool(trace_gvn, false,"trace global value numbering") DEFINE_bool(trace_representation, false,"trace representation types") DEFINE_bool(stress_pointer_maps, false,"pointer map for every instruction") DEFINE_bool(stress_environments, false,"environment for every instruction") DEFINE_int(deopt_every_n_times, 0,"deoptimize every n times a deopt point is passed") DEFINE_bool(trap_on_deopt, false,"put a break point before deoptimizing") DEFINE_bool(deoptimize_uncommon_cases, true,"deoptimize uncommon cases") DEFINE_bool(polymorphic_inlining, true,"polymorphic inlining") DEFINE_bool(use_osr, true,"use on-stack replacement") DEFINE_bool(array_bounds_checks_elimination, false,"perform array bounds checks elimination") DEFINE_bool(array_index_dehoisting, false,"perform array index dehoisting") DEFINE_bool(trace_osr, false,"trace on-stack replacement") DEFINE_int(stress_runs, 0,"number of stress runs") DEFINE_bool(optimize_closures, true,"optimize closures") DEFINE_bool(inline_construct, true,"inline constructor calls") DEFINE_bool(inline_arguments, true,"inline functions with arguments object") DEFINE_int(loop_weight, 1,"loop weight for representation inference") DEFINE_bool(optimize_for_in, true,"optimize functions containing for-in loops") DEFINE_bool(experimental_profiler, true,"enable all profiler experiments") DEFINE_bool(watch_ic_patching, false,"profiler considers IC stability") DEFINE_int(frame_count, 1,"number of stack frames inspected by the profiler") DEFINE_bool(self_optimization, false,"primitive functions trigger their own optimization") DEFINE_bool(direct_self_opt, false,"call recompile stub directly when self-optimizing") DEFINE_bool(retry_self_opt, false,"re-try self-optimization if it failed") DEFINE_bool(count_based_interrupts, false,"trigger profiler ticks based on counting instead of timing") DEFINE_bool(interrupt_at_exit, false,"insert an interrupt check at function exit") DEFINE_bool(weighted_back_edges, false,"weight back edges by jump distance for interrupt triggering") DEFINE_int(interrupt_budget, 5900,"execution budget before interrupt is triggered") DEFINE_int(type_info_threshold, 15,"percentage of ICs that must have type info to allow optimization") DEFINE_int(self_opt_count, 130,"call count before self-optimization") DEFINE_implication(experimental_profiler, watch_ic_patching) DEFINE_implication(experimental_profiler, self_optimization) DEFINE_implication(experimental_profiler, retry_self_opt) DEFINE_implication(experimental_profiler, count_based_interrupts) DEFINE_implication(experimental_profiler, interrupt_at_exit) DEFINE_implication(experimental_profiler, weighted_back_edges) DEFINE_bool(trace_opt_verbose, false,"extra verbose compilation tracing") DEFINE_implication(trace_opt_verbose, trace_opt) DEFINE_bool(debug_code, false,"generate extra code (assertions) for debugging") DEFINE_bool(code_comments, false,"emit comments in code disassembly") DEFINE_bool(enable_sse2, true,"enable use of SSE2 instructions if available") DEFINE_bool(enable_sse3, true,"enable use of SSE3 instructions if available") DEFINE_bool(enable_sse4_1, true,"enable use of SSE4.1 instructions if available") DEFINE_bool(enable_cmov, true,"enable use of CMOV instruction if available") DEFINE_bool(enable_rdtsc, true,"enable use of RDTSC instruction if available") DEFINE_bool(enable_sahf, true,"enable use of SAHF instruction if available (X64 only)") DEFINE_bool(enable_vfp3, true,"enable use of VFP3 instructions if available - this implies ""enabling ARMv7 instructions (ARM only)") DEFINE_bool(enable_armv7, true,"enable use of ARMv7 instructions if available (ARM only)") DEFINE_bool(enable_fpu, true,"enable use of MIPS FPU instructions if available (MIPS only)") DEFINE_string(expose_natives_as, NULL,"expose natives in global object") DEFINE_string(expose_debug_as, NULL,"expose debug in global object") DEFINE_bool(expose_gc, false,"expose gc extension") DEFINE_bool(expose_externalize_string, false,"expose externalize string extension") DEFINE_int(stack_trace_limit, 10,"number of stack frames to capture") DEFINE_bool(builtins_in_stack_traces, false,"show built-in functions in stack traces") DEFINE_bool(disable_native_files, false,"disable builtin natives files") DEFINE_bool(inline_new, true,"use fast inline allocation") DEFINE_bool(stack_trace_on_abort, true,"print a stack trace if an assertion failure occurs") DEFINE_bool(trace, false,"trace function calls") DEFINE_bool(mask_constants_with_cookie, true,"use random jit cookie to mask large constants") DEFINE_bool(lazy, true,"use lazy compilation") DEFINE_bool(trace_opt, false,"trace lazy optimization") DEFINE_bool(trace_opt_stats, false,"trace lazy optimization statistics") DEFINE_bool(opt, true,"use adaptive optimizations") DEFINE_bool(always_opt, false,"always try to optimize functions") DEFINE_bool(prepare_always_opt, false,"prepare for turning on always opt") DEFINE_bool(trace_deopt, false,"trace deoptimization") DEFINE_int(min_preparse_length, 1024,"minimum length for automatic enable preparsing") DEFINE_bool(always_full_compiler, false,"try to use the dedicated run-once backend for all code") DEFINE_bool(trace_bailout, false,"print reasons for falling back to using the classic V8 backend") DEFINE_bool(compilation_cache, true,"enable compilation cache") DEFINE_bool(cache_prototype_transitions, true,"cache prototype transitions") DEFINE_bool(trace_debug_json, false,"trace debugging JSON request/response") DEFINE_bool(debugger_auto_break, true,"automatically set the debug break flag when debugger commands are ""in the queue") DEFINE_bool(enable_liveedit, true,"enable liveedit experimental feature") DEFINE_bool(break_on_abort, true,"always cause a debug break before aborting") DEFINE_int(stack_size, kPointerSize *123,"default size of stack region v8 is allowed to use (in kBytes)") DEFINE_int(max_stack_trace_source_length, 300,"maximum length of function source code printed in a stack trace.") DEFINE_bool(always_inline_smi_code, false,"always inline smi code in non-opt code") DEFINE_int(max_new_space_size, 0,"max size of the new generation (in kBytes)") DEFINE_int(max_old_space_size, 0,"max size of the old generation (in Mbytes)") DEFINE_int(max_executable_size, 0,"max size of executable memory (in Mbytes)") DEFINE_bool(gc_global, false,"always perform global GCs") DEFINE_int(gc_interval,-1,"garbage collect after <n> allocations") DEFINE_bool(trace_gc, false,"print one trace line following each garbage collection") DEFINE_bool(trace_gc_nvp, false,"print one detailed trace line in name=value format ""after each garbage collection") DEFINE_bool(print_cumulative_gc_stat, false,"print cumulative GC statistics in name=value format on exit") DEFINE_bool(trace_gc_verbose, false,"print more details following each garbage collection") DEFINE_bool(trace_fragmentation, false,"report fragmentation for old pointer and data pages") DEFINE_bool(collect_maps, true,"garbage collect maps from which no objects can be reached") DEFINE_bool(flush_code, true,"flush code that we expect not to use again before full gc") DEFINE_bool(incremental_marking, true,"use incremental marking") DEFINE_bool(incremental_marking_steps, true,"do incremental marking steps") DEFINE_bool(trace_incremental_marking, false,"trace progress of the incremental marking") DEFINE_bool(use_idle_notification, true,"Use idle notification to reduce memory footprint.") DEFINE_bool(send_idle_notification, false,"Send idle notifcation between stress runs.") DEFINE_bool(use_ic, true,"use inline caching") DEFINE_bool(native_code_counters, false,"generate extra code for manipulating stats counters") DEFINE_bool(always_compact, false,"Perform compaction on every full GC") DEFINE_bool(lazy_sweeping, true,"Use lazy sweeping for old pointer and data spaces") DEFINE_bool(never_compact, false,"Never perform compaction on full GC - testing only") DEFINE_bool(compact_code_space, true,"Compact code space on full non-incremental collections") DEFINE_bool(cleanup_code_caches_at_gc, true,"Flush inline caches prior to mark compact collection and ""flush code caches in maps during mark compact cycle.") DEFINE_int(random_seed, 0,"Default seed for initializing random generator ""(0, the default, means to use system random).") DEFINE_bool(use_verbose_printer, true,"allows verbose printing") DEFINE_bool(allow_natives_syntax, false,"allow natives syntax") DEFINE_bool(trace_sim, false,"Trace simulator execution") DEFINE_bool(check_icache, false,"Check icache flushes in ARM and MIPS simulator") DEFINE_int(stop_sim_at, 0,"Simulator stop after x number of instructions") DEFINE_int(sim_stack_alignment, 8,"Stack alingment in bytes in simulator (4 or 8, 8 is default)") DEFINE_bool(trace_exception, false,"print stack trace when throwing exceptions") DEFINE_bool(preallocate_message_memory, false,"preallocate some memory to build stack traces.") DEFINE_bool(randomize_hashes, true,"randomize hashes to avoid predictable hash collisions ""(with snapshots this option cannot override the baked-in seed)") DEFINE_int(hash_seed, 0,"Fixed seed to use to hash property keys (0 means random)""(with snapshots this option cannot override the baked-in seed)") DEFINE_bool(preemption, false,"activate a 100ms timer that switches between V8 threads") DEFINE_bool(regexp_optimization, true,"generate optimized regexp code") DEFINE_bool(testing_bool_flag, true,"testing_bool_flag") DEFINE_int(testing_int_flag, 13,"testing_int_flag") DEFINE_float(testing_float_flag, 2.5,"float-flag") DEFINE_string(testing_string_flag,"Hello, world!","string-flag") DEFINE_int(testing_prng_seed, 42,"Seed used for threading test randomness") DEFINE_string(testing_serialization_file,"/tmp/serdes","file in which to serialize heap") DEFINE_bool(help, false,"Print usage message, including flags, on console") DEFINE_bool(dump_counters, false,"Dump counters on exit") DEFINE_string(map_counters,"","Map counters to a file") DEFINE_args(js_arguments, JSARGUMENTS_INIT,"Pass all remaining arguments to the script. Alias for \"--\".") DEFINE_bool(debug_compile_events, true,"Enable debugger compile events") DEFINE_bool(debug_script_collected_events, true,"Enable debugger script collected events") DEFINE_bool(gdbjit, false,"enable GDBJIT interface (disables compacting GC)") DEFINE_bool(gdbjit_full, false,"enable GDBJIT interface for all code objects") DEFINE_bool(gdbjit_dump, false,"dump elf objects with debug info to disk") DEFINE_string(gdbjit_dump_filter,"","dump only objects containing this substring") DEFINE_bool(force_marking_deque_overflows, false,"force overflows of marking deque by reducing it's size ""to 64 words") DEFINE_bool(stress_compaction, false,"stress the GC compactor to flush out bugs (implies ""--force_marking_deque_overflows)")#define FLAG DEFINE_bool(enable_slow_asserts, false,"enable asserts that are slow to execute") DEFINE_bool(trace_codegen, false,"print name of functions for which code is generated") DEFINE_bool(print_source, false,"pretty print source code") DEFINE_bool(print_builtin_source, false,"pretty print source code for builtins") DEFINE_bool(print_ast, false,"print source AST") DEFINE_bool(print_builtin_ast, false,"print source AST for builtins") DEFINE_string(stop_at,"","function name where to insert a breakpoint") DEFINE_bool(print_builtin_scopes, false,"print scopes for builtins") DEFINE_bool(print_scopes, false,"print scopes") DEFINE_bool(trace_contexts, false,"trace contexts operations") DEFINE_bool(gc_greedy, false,"perform GC prior to some allocations") DEFINE_bool(gc_verbose, false,"print stuff during garbage collection") DEFINE_bool(heap_stats, false,"report heap statistics before and after GC") DEFINE_bool(code_stats, false,"report code statistics after GC") DEFINE_bool(verify_heap, false,"verify heap pointers before and after GC") DEFINE_bool(print_handles, false,"report handles after GC") DEFINE_bool(print_global_handles, false,"report global handles after GC") DEFINE_bool(trace_ic, false,"trace inline cache state transitions") DEFINE_bool(print_interfaces, false,"print interfaces") DEFINE_bool(print_interface_details, false,"print interface inference details") DEFINE_int(print_interface_depth, 5,"depth for printing interfaces") DEFINE_bool(trace_normalization, false,"prints when objects are turned into dictionaries.") DEFINE_bool(trace_lazy, false,"trace lazy compilation") DEFINE_bool(collect_heap_spill_statistics, false,"report heap spill statistics along with heap_stats ""(requires heap_stats)") DEFINE_bool(trace_isolates, false,"trace isolate state changes") DEFINE_bool(log_state_changes, false,"Log state changes.") DEFINE_bool(regexp_possessive_quantifier, false,"enable possessive quantifier syntax for testing") DEFINE_bool(trace_regexp_bytecodes, false,"trace regexp bytecode execution") DEFINE_bool(trace_regexp_assembler, false,"trace regexp macro assembler calls.")#define FLAG DEFINE_bool(log, false,"Minimal logging (no API, code, GC, suspect, or handles samples).") DEFINE_bool(log_all, false,"Log all events to the log file.") DEFINE_bool(log_runtime, false,"Activate runtime system %Log call.") DEFINE_bool(log_api, false,"Log API events to the log file.") DEFINE_bool(log_code, false,"Log code events to the log file without profiling.") DEFINE_bool(log_gc, false,"Log heap samples on garbage collection for the hp2ps tool.") DEFINE_bool(log_handles, false,"Log global handle events.") DEFINE_bool(log_snapshot_positions, false,"log positions of (de)serialized objects in the snapshot.") DEFINE_bool(log_suspect, false,"Log suspect operations.") DEFINE_bool(prof, false,"Log statistical profiling information (implies --log-code).") DEFINE_bool(prof_auto, true,"Used with --prof, starts profiling automatically") DEFINE_bool(prof_lazy, false,"Used with --prof, only does sampling and logging"" when profiler is active (implies --noprof_auto).") DEFINE_bool(prof_browser_mode, true,"Used with --prof, turns on browser-compatible mode for profiling.") DEFINE_bool(log_regexp, false,"Log regular expression execution.") DEFINE_bool(sliding_state_window, false,"Update sliding state window counters.") DEFINE_string(logfile,"v8.log","Specify the name of the log file.") DEFINE_bool(ll_prof, false,"Enable low-level linux profiler.")#define FLAG DEFINE_bool(trace_elements_transitions, false,"trace elements transitions") DEFINE_bool(print_code_stubs, false,"print code stubs") DEFINE_bool(test_secondary_stub_cache, false,"test secondary stub cache by disabling the primary one") DEFINE_bool(test_primary_stub_cache, false,"test primary stub cache by disabling the secondary one") DEFINE_bool(print_code, false,"print generated code") DEFINE_bool(print_opt_code, false,"print optimized code") DEFINE_bool(print_unopt_code, false,"print unoptimized code before ""printing optimized code based on it") DEFINE_bool(print_code_verbose, false,"print more information for code") DEFINE_bool(print_builtin_code, false,"print generated code for builtins")#47"/Users/thlorenz/dev/dx/v8-perf/build/v8/src/flags.cc"2 namespace{struct Flag{enum FlagType{TYPE_BOOL, TYPE_INT, TYPE_FLOAT, TYPE_STRING, TYPE_ARGS} name
Definition: flags.cc:1349
static V8EXPORT Local< String > New(const char *data, int length=-1)
Definition: api.cc:4655
v8::Persistent< v8::Context > CreateShellContext()
Definition: shell.cc:97
int RunMain(int argc, char *argv[])
Definition: shell.cc:219
const char * ToCString(const v8::String::Utf8Value &value)
Definition: shell.cc:90
void Set(Handle< String > name, Handle< Data > value, PropertyAttribute attributes=None)
Definition: api.cc:894
static bool Dispose()
Definition: api.cc:4224
Handle< Value > GetScriptResourceName() const
Definition: api.cc:1785
int GetEndColumn() const
Definition: api.cc:1920
v8::Handle< v8::Value > Read(const v8::Arguments &args)
Definition: shell.cc:140
v8::Handle< v8::String > ReadFile(const char *name)
Definition: shell.cc:197
static const char * GetVersion()
Definition: api.cc:4291
static Local< ObjectTemplate > New()
Definition: api.cc:1246
activate correct semantics for inheriting readonliness enable harmony semantics for typeof enable harmony enable harmony proxies enable all harmony harmony_scoping harmony_proxies harmony_scoping tracks arrays with only smi values automatically unbox arrays of doubles use crankshaft use hydrogen range analysis use hydrogen global value numbering use function inlining maximum number of AST nodes considered for a single inlining loop invariant code motion print statistics for hydrogen trace generated IR for specified phases trace register allocator trace range analysis trace representation types environment for every instruction put a break point before deoptimizing polymorphic inlining perform array bounds checks elimination trace on stack replacement optimize closures functions with arguments object optimize functions containing for in loops profiler considers IC stability primitive functions trigger their own optimization re try self optimization if it failed insert an interrupt check at function exit execution budget before interrupt is triggered call count before self optimization self_optimization count_based_interrupts weighted_back_edges trace_opt emit comments in code disassembly enable use of SSE3 instructions if available enable use of CMOV instruction if available enable use of SAHF instruction if enable use of VFP3 instructions if available this implies enabling ARMv7 enable use of ARMv7 instructions if enable use of MIPS FPU instructions if NULL
int Length() const
Definition: v8.h:4143
bool IsUndefined() const
Definition: v8.h:4277
int GetLineNumber() const
Definition: api.cc:1865
Local< Value > StackTrace() const
Definition: api.cc:1724
v8::Handle< v8::Value > Quit(const v8::Arguments &args)
Definition: shell.cc:180
void ReportException(v8::TryCatch *handler)
Definition: shell.cc:305
v8::Handle< v8::Value > Version(const v8::Arguments &args)
Definition: shell.cc:191
bool ExecuteString(v8::Handle< v8::String > source, v8::Handle< v8::Value > name, bool print_result, bool report_exceptions)
Definition: shell.cc:270
v8::Handle< v8::Value > Load(const v8::Arguments &args)
Definition: shell.cc:159
Handle< Primitive > V8EXPORT Undefined()
Definition: api.cc:546
bool IsEmpty() const
Definition: v8.h:208
Local< Value > Run()
Definition: api.cc:1590
static Persistent< Context > New(ExtensionConfiguration *extensions=NULL, Handle< ObjectTemplate > global_template=Handle< ObjectTemplate >(), Handle< Value > global_object=Handle< Value >())
Definition: api.cc:4308
static void SetFlagsFromCommandLine(int *argc, char **argv, bool remove_flags)
Definition: api.cc:480
int GetStartColumn() const
Definition: api.cc:1902
Handle< Value > V8EXPORT ThrowException(Handle< Value > exception)
Definition: api.cc:485
Definition: v8.h:105
void RunShell(v8::Handle< v8::Context > context)
Definition: shell.cc:251
Local< v8::Message > Message() const
Definition: api.cc:1742
Local< String > GetSourceLine() const
Definition: api.cc:1940