Intel VTune integration for V8/D8

src/third_party/vtune/vtune-jit.cc

+/*
+  This file is provided under a dual BSD/GPLv2 license.  When using or
+  redistributing this file, you may do so under either license.
+
+  GPL LICENSE SUMMARY
+
+  Copyright(c) 2005-2012 Intel Corporation. All rights reserved.
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of version 2 of the GNU General Public License as
+  published by the Free Software Foundation.
+
+  This program is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+  The full GNU General Public License is included in this distribution
+  in the file called LICENSE.GPL.
+
+  Contact Information:
+  http://software.intel.com/en-us/articles/intel-vtune-amplifier-xe/
+
+  BSD LICENSE
+
+  Copyright(c) 2005-2012 Intel Corporation. All rights reserved.
+  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 with the
+      distribution.
+    * Neither the name of Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+#include <string.h>
+
+#include "third_party/vtune/v8-vtune.h"
+#include "third_party/vtune/vtune-jit.h"
+
+namespace vTune {
+namespace internal {
+
+
+// This class is used to record the JITted code position info for JIT
+// code profiling.
+class JITCodeLineInfo : public Malloced {
+ public:
+  JITCodeLineInfo() : line_num_info_(10) { }
+
+  void SetPosition(intptr_t pc, int pos) {
+    AddCodeLineInfo(LineNumInfo(pc, pos));
+  }
+
+  struct LineNumInfo {
+    LineNumInfo(intptr_t pc, int pos)
+        : pc_(pc), pos_(pos) { }
+
+    intptr_t pc_;
+    int pos_;
+  };
+
+  List<LineNumInfo>* GetLineNumInfo() {
+    return &line_num_info_;
+  }
+
+ private:
+  void AddCodeLineInfo(const LineNumInfo& line_info) {
+    line_num_info_.Add(line_info);
+  }
+  List<LineNumInfo> line_num_info_;
+};
+
+Mutex* VTUNEJITInterface::vtunemutex_ = OS::CreateMutex();
+
+static bool SameCodeObjects(void* key1, void* key2) {
+  return key1 == key2;
+}
+
+static  HashMap* GetEntries() {
+  static HashMap* entries;
+  if (entries == NULL) {
+    entries = new HashMap(&SameCodeObjects);
+  }
+  return entries;
+}
+
+static uint32_t HashForCodeObject(void* code) {
+  static const uintptr_t kGoldenRatio = 2654435761u;
+  uintptr_t hash = reinterpret_cast<uintptr_t>(code);
+  return static_cast<uint32_t>(hash * kGoldenRatio);
+}
+
+
+static const intptr_t kLineInfoTag = 0x1;
+
+static bool IsSourceInfoAvailable(Handle<Script> script) {
+  return !script.is_null() &&
+      script->source()->IsString() &&
+      script->HasValidSource() &&
+      script->name()->IsString();
+}
+
+static bool IsLineInfoTagged(void* ptr) {
+  return 0 != (reinterpret_cast<intptr_t>(ptr));
+}
+
+static void* TagLineInfo(JITCodeLineInfo* ptr) {
+  return reinterpret_cast<void*>(reinterpret_cast<intptr_t>(ptr));
+}
+
+static JITCodeLineInfo* UntagLineInfo(void* ptr) {
+  return reinterpret_cast<JITCodeLineInfo*>(
+      reinterpret_cast<intptr_t>(ptr));
+}
+
+// The parameter str is a mixed pattern which contains the
+// function name and some other info. It comes from all the
+// Logger::CodeCreateEvent(...) function. This funtion get the
+// pure function name from the input parameter.
+static char* GetFunctionNameFromMixedName(const char* str, int length) {
+  int index = 0;
+  int count = 0;
+  char* start_ptr = NULL;
+
+  while (str[index++] != ':' && (index < length)) {}
+
+  if (str[index] == '*' || str[index] == '~' ) index++;
+  if (index >= length) return NULL;
+
+  start_ptr = const_cast<char*>(str + index);
+
+  while (index < length && str[index++] != ' ') {
+    count++;
+  }
+
+  char* result = NewArray<char>(count + 1);
+  memcpy(result, start_ptr, count);
+  result[count] = '\0';
+
+  return result;
+}
+
+// The JitCodeEventHandler for Vtune.
+void VTUNEJITInterface::event_handler(const v8::JitCodeEvent* event) {
+  CHECK(event != NULL);
+
+  if (VTUNERUNNING) {
+    switch (event->type) {
+      case v8::JitCodeEvent::CODE_ADDED: {
+        ScopedLock lock(vtunemutex_);
+
+        char* temp_file_name = NULL;
+        char* temp_method_name =
+            GetFunctionNameFromMixedName(event->name.str,
+                                         static_cast<int>(event->name.len));
+        iJIT_Method_Load jmethod;
+        memset(&jmethod, 0, sizeof jmethod);
+        jmethod.method_id = iJIT_GetNewMethodID();
+        jmethod.method_load_address = event->code_start;
+        jmethod.method_size = static_cast<unsigned int>(event->code_len);
+        jmethod.method_name = temp_method_name;
+
+        Script** script_handler =
+            reinterpret_cast<v8::internal::Script**>(*event->script);

[danno, 2013/03/27 12:33:48]

You should at no point access anything in the v8::internal namespace in this
implementation. Everything you have to do you must do with the v8.h API

+        if (script_handler != NULL) {
+          Script* script = *script_handler;
+
+          if (script != NULL && script->name()->IsString()) {
+            // Get the source file name and set it to jmethod.source_file_name
+            Handle<String> filename =
+                Handle<String>(String::cast(script->name()));
+            SmartArrayPointer<char> filename_cstring =
+                filename->ToCString(DISALLOW_NULLS);
+
+            size_t str_length = strlen(*filename_cstring);
+            temp_file_name = NewArray<char>(str_length + 1);
+            memcpy(temp_file_name, *filename_cstring, str_length +1);
+
+            jmethod.source_file_name = temp_file_name;
+
+            HashMap::Entry* entry =
+                GetEntries()->Lookup(event->code_start,
+                                     HashForCodeObject(event->code_start),
+                                     false);
+
+            if (entry != NULL && IsLineInfoTagged(entry->value)
+                && IsSourceInfoAvailable(Handle<Script>(script))) {
+              // Get the line_num_info and set it to jmethod.line_number_table
+              GetScriptLineNumber(Handle<Script>(script), 0);
+              JITCodeLineInfo* line_info = UntagLineInfo(entry->value);
+              List<JITCodeLineInfo::LineNumInfo>* vtunelineinfo =
+                  line_info->GetLineNumInfo();
+
+              jmethod.line_number_size = vtunelineinfo->length();
+              jmethod.line_number_table =
+                  reinterpret_cast<LineNumberInfo*>(
+                      malloc(sizeof(LineNumberInfo)*jmethod.line_number_size));
+              // populate the lineinfo for the code. Filter it before
+              for (int e = 0; e < vtunelineinfo->length(); e++) {
+                JITCodeLineInfo::LineNumInfo line_info = vtunelineinfo->at(e);
+                jmethod.line_number_table[e].Offset =
+                    static_cast<unsigned int>(line_info.pc_);
+                jmethod.line_number_table[e].LineNumber =
+                    GetScriptLineNumberSafe(
+                        Handle<Script>(script), line_info.pos_)+1;
+              }
+              delete line_info;
+            }
+            GetEntries()->Remove(event->code_start,
+                                 HashForCodeObject(event->code_start));
+#ifdef DEBUG
+            PrintF("Filename: %s,  MethodName: %s\n",
+                   jmethod.source_file_name,
+                   jmethod.method_name);
+#endif
+          }
+        }
+
+        iJIT_NotifyEvent(iJVM_EVENT_TYPE_METHOD_LOAD_FINISHED,
+                         reinterpret_cast<void*>(&jmethod));
+        DeleteArray(temp_method_name);
+        DeleteArray(temp_file_name);
+        break;
+      }
+      // TODO(chunyang.dai@intel.com): code_move will be supported.
+      case v8::JitCodeEvent::CODE_MOVED:
+        break;
+      // Currently the CODE_REMOVED event is not issued.
+      case v8::JitCodeEvent::CODE_REMOVED:
+        break;
+      case v8::JitCodeEvent::CODE_ADD_LINE_POS_INFO: {
+        JITCodeLineInfo* line_info =
+            reinterpret_cast<JITCodeLineInfo*>(event->user_data);
+        if (line_info != NULL) {
+          line_info->SetPosition(static_cast<intptr_t>(event->line_info.offset),
+                                 static_cast<int>(event->line_info.pos));
+        }
+        break;
+      }
+      case v8::JitCodeEvent::CODE_START_LINE_INFO_RECORDING: {
+        v8::JitCodeEvent* temp_event = const_cast<v8::JitCodeEvent*>(event);
+        temp_event->user_data = new JITCodeLineInfo();
+        break;
+      }
+      case v8::JitCodeEvent::CODE_END_LINE_INFO_RECORDING: {
+        ScopedLock lock(vtunemutex_);
+        HashMap::Entry* entry =
+            GetEntries()->Lookup(event->code_start,
+                                 HashForCodeObject(event->code_start),
+                                 true);
+
+        ASSERT(entry->value == NULL);
+        entry->value =
+            TagLineInfo(reinterpret_cast<JITCodeLineInfo*>(event->user_data));
+        break;
+      }
+      default:
+        CHECK(false);
+        break;
+    }
+  }
+  return;
+}
+
+}  // namespace internal
+
+void InitilizeVtuneForV8() {
+  if (v8::V8::Initialize()) {
+    v8::V8::SetFlagsFromString("--nocompact_code_space",
+                               i::StrLength("--nocompact_code_space"));
+    v8::V8::SetJitCodeEventHandler(v8::kJitCodeEventDefault,
+        vTune::internal::VTUNEJITInterface::event_handler);
+  }
+}
+
+}  // namespace vTune