Enable assertions and debugging code in the release...

src/flag-definitions.h

 // 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
@@ skipping 79 matching lines @@
 #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 / assembler-x64.cc
-DEFINE_bool(debug_code, false,
+DEFINE_bool(debug_code, true,
             "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(enable_sse2, true,
             "enable use of SSE2 instructions if available")
 DEFINE_bool(enable_sse3, true,
             "enable use of SSE3 instructions if available")
@@ skipping 190 matching lines @@
 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(verify_heap, true, "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,
@@ skipping 95 matching lines @@
 #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