Support for the Linux 'perf report' and 'perf annotate' tools.

src/flag-definitions.h

 // Copyright 2012 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 769 matching lines @@
             "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_browser_mode, true,
             "Used with --prof, turns on browser-compatible mode for profiling.")
 DEFINE_bool(log_regexp, false, "Log regular expression execution.")
 DEFINE_string(logfile, "v8.log", "Specify the name of the log file.")
 DEFINE_bool(logfile_per_isolate, true, "Separate log files for each isolate.")
 DEFINE_bool(ll_prof, false, "Enable low-level linux profiler.")
+DEFINE_bool(perf_basic_prof, false, "Enable perf linux profiler (basic support).")

[danno, 2013/11/13 17:18:10]

nit: 80 col (tools/presubmit should have pointed this out, BTW)

+DEFINE_bool(perf_jit_prof, false, "Enable perf linux profiler "

[danno, 2013/11/13 17:18:10]

How about call this one perf_annotate_support?

+                                  "(experimental annotate support).")

[danno, 2013/11/13 17:18:10]

You probably want to make sure that these flags imply nocompact_code_space, or
at least in MarkCompactCollector::StartCompaction make sure, just like with the
gdbjit, that when these features are on, there is no compaction possible.

 DEFINE_string(gc_fake_mmap, "/tmp/__v8_gc__",
               "Specify the name of the file for fake gc mmap used in ll_prof")
 DEFINE_bool(log_internal_timer_events, false, "Time internal events.")
 DEFINE_bool(log_timer_events, false,
             "Time events including external callbacks.")
 DEFINE_implication(log_timer_events, log_internal_timer_events)
 DEFINE_implication(log_internal_timer_events, prof)
 
 DEFINE_bool(redirect_code_traces, false,
             "output deopt information and disassembly into file "
@@ skipping 88 matching lines @@
 #undef DEFINE_ALIAS_float
 #undef DEFINE_ALIAS_args
 
 #undef FLAG_MODE_DECLARE
 #undef FLAG_MODE_DEFINE
 #undef FLAG_MODE_DEFINE_DEFAULTS
 #undef FLAG_MODE_META
 #undef FLAG_MODE_DEFINE_IMPLICATIONS
 
 #undef COMMA