CSE2410 Fall 2014 Bounce

// Copyright 2008 the V8 project authors. All rights reserved.

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions are

// met:

//

//     * Redistributions of source code must retain the above copyright

//       notice, this list of conditions and the following disclaimer.

//     * Redistributions in binary form must reproduce the above

//       copyright notice, this list of conditions and the following

//       disclaimer in the documentation and/or other materials provided

//       with the distribution.

//     * Neither the name of Google Inc. nor the names of its

//       contributors may be used to endorse or promote products derived

//       from this software without specific prior written permission.

//

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// This file defines all of the flags.  It is separated into different section,

// for Debug, Release, Logging and Profiling, etc.  To add a new flag, find the

// correct section, and use one of the DEFINE_ macros, without a trailing ';'.

//

// This include does not have a guard, because it is a template-style include,

// which can be included multiple times in different modes.  It expects to have

// a mode defined before it's included.  The modes are FLAG_MODE_... below:

// We want to declare the names of the variables for the header file.  Normally

// this will just be an extern declaration, but for a readonly flag we let the

// compiler make better optimizations by giving it the value.

#if defined(FLAG_MODE_DECLARE)

#define FLAG_FULL(ftype, ctype, nam, def, cmt) \

  extern ctype FLAG_##nam;

#define FLAG_READONLY(ftype, ctype, nam, def, cmt) \

  static ctype const FLAG_##nam = def;

// We want to supply the actual storage and value for the flag variable in the

// .cc file.  We only do this for writable flags.

#elif defined(FLAG_MODE_DEFINE)

#define FLAG_FULL(ftype, ctype, nam, def, cmt) \

  ctype FLAG_##nam = def;

#define FLAG_READONLY(ftype, ctype, nam, def, cmt)

// We need to define all of our default values so that the Flag structure can

// access them by pointer.  These are just used internally inside of one .cc,

// for MODE_META, so there is no impact on the flags interface.

#elif defined(FLAG_MODE_DEFINE_DEFAULTS)

#define FLAG_FULL(ftype, ctype, nam, def, cmt) \

  static ctype const FLAGDEFAULT_##nam = def;

#define FLAG_READONLY(ftype, ctype, nam, def, cmt)

// We want to write entries into our meta data table, for internal parsing and

// printing / etc in the flag parser code.  We only do this for writable flags.

#elif defined(FLAG_MODE_META)

#define FLAG_FULL(ftype, ctype, nam, def, cmt) \

  { Flag::TYPE_##ftype, #nam, &FLAG_##nam, &FLAGDEFAULT_##nam, cmt, false },

#define FLAG_READONLY(ftype, ctype, nam, def, cmt)

#else

#error No mode supplied when including flags.defs

#endif

#ifdef FLAG_MODE_DECLARE

// Structure used to hold a collection of arguments to the JavaScript code.

struct JSArguments {

public:

  JSArguments();

  JSArguments(int argc, const char** argv);

  int argc() const;

  const char** argv();

  const char*& operator[](int idx);

  JSArguments& operator=(JSArguments args);

private:

  int argc_;

  const char** argv_;

};

#endif

#define DEFINE_bool(nam, def, cmt) FLAG(BOOL, bool, nam, def, cmt)

#define DEFINE_int(nam, def, cmt) FLAG(INT, int, nam, def, cmt)

#define DEFINE_float(nam, def, cmt) FLAG(FLOAT, double, nam, def, cmt)

#define DEFINE_string(nam, def, cmt) FLAG(STRING, const char*, nam, def, cmt)

#define DEFINE_args(nam, def, cmt) FLAG(ARGS, JSArguments, nam, def, cmt)

//

// Flags in all modes.

//

#define FLAG FLAG_FULL

// assembler-ia32.cc / assembler-arm.cc

DEFINE_bool(debug_code, false,

            "generate extra code (comments, assertions) for debugging")

DEFINE_bool(emit_branch_hints, false, "emit branch hints")

DEFINE_bool(push_pop_elimination, true,

            "eliminate redundant push/pops in assembly code")

DEFINE_bool(print_push_pop_elimination, false,

            "print elimination of redundant push/pops in assembly code")

// bootstrapper.cc

DEFINE_string(expose_natives_as, NULL, "expose natives in global object")

DEFINE_string(expose_debug_as, NULL, "expose debug in global object")

DEFINE_string(natives_file, NULL, "alternative natives file")

DEFINE_bool(expose_gc, false, "expose gc extension")

// builtins-ia32.cc

DEFINE_bool(inline_new, true, "use fast inline allocation")

// checks.cc

DEFINE_bool(stack_trace_on_abort, true,

            "print a stack trace if an assertion failure occurs")

// codegen-ia32.cc / codegen-arm.cc

DEFINE_bool(trace, false, "trace function calls")

DEFINE_bool(defer_negation, true, "defer negation operation")

DEFINE_bool(check_stack, true,

            "check stack for overflow, interrupt, breakpoint")

// codegen.cc

DEFINE_bool(lazy, true, "use lazy compilation")

DEFINE_bool(debug_info, true, "add debug information to compiled functions")

// compiler.cc

DEFINE_bool(strict, false, "strict error checking")

DEFINE_int(min_preparse_length, 1024,

           "Minimum length for automatic enable preparsing")

// debug.cc

DEFINE_bool(remote_debugging, false, "enable remote debugging")

DEFINE_bool(trace_debug_json, false, "trace debugging JSON request/response")

DEFINE_bool(debugger_auto_break, false,

            "automatically set the debug break flag when debugger commands are "

            "in the queue (experimental)")

// execution.cc

DEFINE_bool(call_regexp, false, "allow calls to RegExp objects")

// frames.cc

DEFINE_int(max_stack_trace_source_length, 300,

           "maximum length of function source code printed in a stack trace.")

// heap.cc

DEFINE_int(new_space_size, 0, "size of (each semispace in) the new generation")

DEFINE_int(old_space_size, 0, "size of the old generation")

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(collect_maps, true,

            "garbage collect maps from which no objects can be reached")

// ic.cc

DEFINE_bool(use_ic, true, "use inline caching")

// macro-assembler-ia32.cc

DEFINE_bool(native_code_counters, false,

            "generate extra code for manipulating stats counters")

// mark-compact.cc

DEFINE_bool(always_compact, false, "Perform compaction on every full GC")

DEFINE_bool(never_compact, false,

            "Never perform compaction on full GC - testing only")

DEFINE_bool(cleanup_ics_at_gc, true,

            "Flush inline caches prior to mark compact collection.")

DEFINE_bool(cleanup_caches_in_maps_at_gc, true,

            "Flush code caches in maps during mark compact cycle.")

DEFINE_bool(canonicalize_object_literal_maps, true,

            "Canonicalize maps for object literals.")

// mksnapshot.cc

DEFINE_bool(h, false, "print this message")

// parser.cc

DEFINE_bool(allow_natives_syntax, false, "allow natives syntax")

// rewriter.cc

DEFINE_bool(optimize_ast, true, "optimize the ast")

// simulator-arm.cc

DEFINE_bool(trace_sim, false, "trace simulator execution")

DEFINE_int(stop_sim_at, 0, "Simulator stop after x number of instructions")

// top.cc

DEFINE_bool(trace_exception, false,

            "print stack trace when throwing exceptions")

DEFINE_bool(preallocate_message_memory, false,

            "preallocate some memory to build stack traces.")

// usage-analyzer.cc

DEFINE_bool(usage_computation, true, "compute variable usage counts")

// v8.cc

DEFINE_bool(preemption, false,

            "activate a 100ms timer that switches between V8 threads")

// Regexp

DEFINE_bool(trace_regexps, false, "trace regexp execution")

DEFINE_bool(regexp_native, true,

            "use native code regexp implementation (IA32 only)")

DEFINE_bool(regexp_optimization, true, "generate optimized regexp code")

// Testing flags test/cctest/test-{flags,api,serialization}.cc

DEFINE_bool(testing_bool_flag, true, "testing_bool_flag")

DEFINE_int(testing_int_flag, 13, "testing_int_flag")

DEFINE_float(testing_float_flag, 2.5, "float-flag")

DEFINE_string(testing_string_flag, "Hello, world!", "string-flag")

DEFINE_int(testing_prng_seed, 42, "Seed used for threading test randomness")

#ifdef WIN32

DEFINE_string(testing_serialization_file, "C:\\Windows\\Temp\\serdes",

              "file in which to testing_serialize heap")

#else

DEFINE_string(testing_serialization_file, "/tmp/serdes",

              "file in which to serialize heap")

#endif

//

// Dev shell flags

//

DEFINE_bool(help, false, "Print usage message, including flags, on console")

DEFINE_bool(dump_counters, false, "Dump counters on exit")

DEFINE_bool(debugger, true, "Enable JavaScript debugger")

DEFINE_bool(remote_debugger, false, "Connect JavaScript debugger to the "

                                    "debugger agent in another process")

DEFINE_bool(debugger_agent, false, "Enable debugger agent")

DEFINE_int(debugger_port, 5858, "Port to use for remote debugging")

DEFINE_string(map_counters, false, "Map counters to a file")

DEFINE_args(js_arguments, JSArguments(),

            "Pass all remaining arguments to the script. Alias for \"--\".")

//

// Debug only flags

//

#undef FLAG

#ifdef DEBUG

#define FLAG FLAG_FULL

#else

#define FLAG FLAG_READONLY

#endif

// checks.cc

DEFINE_bool(enable_slow_asserts, false,

            "enable asserts that are slow to execute")

// codegen-ia32.cc / codegen-arm.cc

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_bool(trace_calls, false, "trace calls")

DEFINE_bool(trace_builtin_calls, false, "trace builtins calls")

DEFINE_string(stop_at, "", "function name where to insert a breakpoint")

// compiler.cc

DEFINE_bool(print_builtin_scopes, false, "print scopes for builtins")

DEFINE_bool(print_scopes, false, "print scopes")

// contexts.cc

DEFINE_bool(trace_contexts, false, "trace contexts operations")

// heap.cc

DEFINE_bool(gc_greedy, false, "perform GC prior to some allocations")

DEFINE_bool(gc_verbose, false, "print stuff during garbage collection")

DEFINE_bool(heap_stats, false, "report heap statistics before and after GC")

DEFINE_bool(code_stats, false, "report code statistics after GC")

DEFINE_bool(verify_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(print_rset, false, "print remembered sets before GC")

// ic.cc

DEFINE_bool(trace_ic, false, "trace inline cache state transitions")

// objects.cc

DEFINE_bool(trace_normalization,

            false,

            "prints when objects are turned into dictionaries.")

// runtime.cc

DEFINE_bool(trace_lazy, false, "trace lazy compilation")

// serialize.cc

DEFINE_bool(debug_serialization, false,

            "write debug information into the snapshot.")

// spaces.cc

DEFINE_bool(collect_heap_spill_statistics, false,

            "report heap spill statistics along with heap_stats "

            "(requires heap_stats)")

// Regexp

DEFINE_bool(trace_regexp_bytecodes, false, "trace regexp bytecode execution")

DEFINE_bool(trace_regexp_assembler,

            false,

            "trace regexp macro assembler calls.")

//

// Logging and profiling only flags

//

#undef FLAG

#ifdef ENABLE_LOGGING_AND_PROFILING

#define FLAG FLAG_FULL

#else

#define FLAG FLAG_READONLY

#endif

// log.cc

DEFINE_bool(log, false,

            "Minimal logging (no API, code, GC, suspect, or handles samples).")

DEFINE_bool(log_all, false, "Log all events to the log file.")

DEFINE_bool(log_runtime, false, "Activate runtime system %Log call.")

DEFINE_bool(log_api, false, "Log API events to the log file.")

DEFINE_bool(log_code, false,

            "Log code events to the log file without profiling.")

DEFINE_bool(log_gc, false,

            "Log heap samples on garbage collection for the hp2ps tool.")

DEFINE_bool(log_handles, false, "Log global handle events.")

DEFINE_bool(log_state_changes, false, "Log state changes.")

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(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(oprofile, false, "Enable JIT agent for OProfile.")

//

// Heap protection flags

// Using heap protection requires ENABLE_LOGGING_AND_PROFILING as well.

//

#ifdef ENABLE_HEAP_PROTECTION

#undef FLAG

#define FLAG FLAG_FULL

DEFINE_bool(protect_heap, false,

            "Protect/unprotect V8's heap when leaving/entring the VM.")

#endif

//

// Disassembler only flags

//

#undef FLAG

#ifdef ENABLE_DISASSEMBLER

#define FLAG FLAG_FULL

#else

#define FLAG FLAG_READONLY

#endif

// code-stubs.cc

DEFINE_bool(print_code_stubs, false, "print code stubs")

// codegen-ia32.cc / codegen-arm.cc

DEFINE_bool(print_code, false, "print generated code")

DEFINE_bool(print_builtin_code, false, "print generated code for builtins")

// Cleanup...

#undef FLAG_FULL

#undef FLAG_READONLY

#undef FLAG

#undef DEFINE_bool

#undef DEFINE_int

#undef DEFINE_string

#undef FLAG_MODE_DECLARE

#undef FLAG_MODE_DEFINE

#undef FLAG_MODE_DEFINE_DEFAULTS

#undef FLAG_MODE_META