New static flags system

src/flags.defs

Index: src/flags.defs
diff --git a/src/flags.defs b/src/flags.defs
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+// 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 },
+#define FLAG_READONLY(ftype, ctype, nam, def, cmt)
+
+#else
+#error No mode supplied when including flags.defs
+#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)
+
+//
+// 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")
+DEFINE_bool(eliminate_jumps, true, "eliminate jumps to jumps in assembly code")
+DEFINE_bool(print_jump_elimination, false,
+            "print elimination of jumps to jumps 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")
+
+// 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")
+
+// 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.")
+
+// mksnapshot.cc
+DEFINE_bool(h, false, "print this message")
+
+// parser.cc
+DEFINE_bool(allow_natives_syntax, false, "allow natives syntax")
+
+// 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")
+
+// 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
+
+
+
+//
+// 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")
+
+// code-stubs.cc
+DEFINE_bool(print_code_stubs, false, "print code stubs")
+
+// codegen-ia32.cc / codegen-arm.cc
+DEFINE_bool(trace_codegen, false,
+            "print name of functions for which code is generated")
+DEFINE_bool(print_builtin_code, false, "print generated code for builtins")
+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)")
+
+//
+// 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_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(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.")
+
+//
+// Disassembler only flags
+//
+#undef FLAG
+#ifdef ENABLE_DISASSEMBLER
+#define FLAG FLAG_FULL
+#else
+#define FLAG FLAG_READONLY
+#endif
+
+// codegen-ia32.cc / codegen-arm.cc
+DEFINE_bool(print_code, false, "print generated code")
+
+
+// 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