Revision: 18358
Author: [email protected]
Date: Wed Dec 18 17:31:12 2013 UTC
Log: --predictable mode added
[email protected]
Review URL: https://codereview.chromium.org/93633008
http://code.google.com/p/v8/source/detail?r=18358
Modified:
/branches/bleeding_edge/src/flag-definitions.h
/branches/bleeding_edge/src/v8.cc
=======================================
--- /branches/bleeding_edge/src/flag-definitions.h Fri Dec 6 09:52:40 2013
UTC
+++ /branches/bleeding_edge/src/flag-definitions.h Wed Dec 18 17:31:12 2013
UTC
@@ -69,6 +69,9 @@
#define DEFINE_implication(whenflag, thenflag) \
if (FLAG_##whenflag) FLAG_##thenflag = true;
+#define DEFINE_neg_implication(whenflag, thenflag) \
+ if (FLAG_##whenflag) FLAG_##thenflag = false;
+
#else
#error No mode supplied when including flags.defs
#endif
@@ -90,6 +93,10 @@
#define DEFINE_implication(whenflag, thenflag)
#endif
+#ifndef DEFINE_neg_implication
+#define DEFINE_neg_implication(whenflag, thenflag)
+#endif
+
#define COMMA ,
#ifdef FLAG_MODE_DECLARE
@@ -628,6 +635,14 @@
DEFINE_bool(profile_hydrogen_code_stub_compilation, false,
"Print the time it takes to lazily compile hydrogen code
stubs.")
+DEFINE_bool(predictable, false, "enable predictable mode")
+DEFINE_neg_implication(predictable, randomize_hashes)
+DEFINE_neg_implication(predictable, concurrent_recompilation)
+DEFINE_neg_implication(predictable, concurrent_osr)
+DEFINE_neg_implication(predictable, concurrent_sweeping)
+DEFINE_neg_implication(predictable, parallel_sweeping)
+
+
//
// Dev shell flags
//
@@ -875,6 +890,7 @@
#undef DEFINE_float
#undef DEFINE_args
#undef DEFINE_implication
+#undef DEFINE_neg_implication
#undef DEFINE_ALIAS_bool
#undef DEFINE_ALIAS_int
#undef DEFINE_ALIAS_string
=======================================
--- /branches/bleeding_edge/src/v8.cc Wed Nov 27 17:21:40 2013 UTC
+++ /branches/bleeding_edge/src/v8.cc Wed Dec 18 17:31:12 2013 UTC
@@ -162,6 +162,15 @@
void V8::InitializeOncePerProcessImpl() {
FlagList::EnforceFlagImplications();
+
+ if (FLAG_predictable) {
+ if (FLAG_random_seed == 0) {
+ // Avoid random seeds in predictable mode.
+ FLAG_random_seed = 12347;
+ }
+ FLAG_hash_seed = 0;
+ }
+
if (FLAG_stress_compaction) {
FLAG_force_marking_deque_overflows = true;
FLAG_gc_global = true;
--
--
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