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

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index 2acc59ab4750a95768661f8bf1db3dfdc340a938..941ac42d21cc9aac2d5b05a4f810d3c7d3267279 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -2059,12 +2059,22 @@ bool Isolate::Init(Deserializer* des) {
   // If we are deserializing, log non-function code objects and compiled
   // functions found in the snapshot.
   if (!create_heap_objects &&
-      (FLAG_log_code || FLAG_ll_prof || logger_->is_logging_code_events())) {
+      (FLAG_log_code ||
+       FLAG_ll_prof ||
+       FLAG_perf_jit_prof ||
+       FLAG_perf_basic_prof ||
+       logger_->is_logging_code_events())) {
     HandleScope scope(this);
     LOG(this, LogCodeObjects());
     LOG(this, LogCompiledFunctions());
   }
 
+  // If we are profiling with the Linux perf tool, we need to disable
+  // code relocation.
+  if (FLAG_perf_jit_prof || FLAG_perf_basic_prof) {
+    FLAG_compact_code_space = false;
+  }
+
   CHECK_EQ(static_cast<int>(OFFSET_OF(Isolate, embedder_data_)),
            Internals::kIsolateEmbedderDataOffset);
   CHECK_EQ(static_cast<int>(OFFSET_OF(Isolate, heap_.roots_)),