[Interpreter] Add support for cpu profiler logging.

src/profiler/sampler.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/profiler/sampler.h"
 
 #if V8_OS_POSIX && !V8_OS_CYGWIN
 
 #define USE_SIGNALS
 
@@ skipping 713 matching lines @@
   if (js_entry_sp == 0) return;  // Not executing JS now.
 
   SafeStackFrameIterator it(isolate, reinterpret_cast<Address>(regs.fp),
                             reinterpret_cast<Address>(regs.sp), js_entry_sp);
   size_t i = 0;
   if (record_c_entry_frame == kIncludeCEntryFrame && !it.done() &&
       it.top_frame_type() == StackFrame::EXIT) {
     frames[i++] = isolate->c_function();
   }
   while (!it.done() && i < frames_limit) {
-    frames[i++] = it.frame()->pc();
+    if (it.frame()->is_interpreted()) {
+      // For interpreted frames use the bytecode array pointer as the pc.
+      InterpretedFrame* frame = static_cast<InterpretedFrame*>(it.frame());
+      // Since the sampler can interrupt execution at any point the
+      // bytecode_array might be garbage, so don't dereference it.
+      Address bytecode_array =
+          reinterpret_cast<Address>(frame->GetBytecodeArray()) - kHeapObjectTag;
+      frames[i++] = bytecode_array + BytecodeArray::kHeaderSize +
+                    frame->GetBytecodeOffset();
+    } else {
+      frames[i++] = it.frame()->pc();
+    }
     it.Advance();
   }
   sample_info->frames_count = i;
 }
 
 
 void Sampler::SetUp() {
 #if defined(USE_SIGNALS)
   SignalHandler::SetUp();
 #endif
@@ skipping 114 matching lines @@
     SampleStack(state);
   }
   ResumeThread(profiled_thread);
 }
 
 #endif  // USE_SIGNALS
 
 
 }  // namespace internal
 }  // namespace v8