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

src/flag-definitions.h

Index: src/flag-definitions.h
diff --git a/src/flag-definitions.h b/src/flag-definitions.h
index f0444d1f26a823296c265caf858bd54811a4c3ad..9c8aea4e5cd91d3278f6582582baa7725b46c7ff 100644
--- a/src/flag-definitions.h
+++ b/src/flag-definitions.h
@@ -787,6 +787,9 @@ 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.")