deps: update V8 to 7.6.303.28

PR-URL: https://github.com/nodejs/node/pull/28016
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Refael Ackermann (רפאל פלחי) <refack@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>

1 files changed, 80 insertions, 0 deletions

diff --git a/deps/v8/src/diagnostics/basic-block-profiler.h b/deps/v8/src/diagnostics/basic-block-profiler.h
new file mode 100644
index 0000000000..960b4b43e1
--- /dev/null
+++ b/deps/v8/src/diagnostics/basic-block-profiler.h
@@ -0,0 +1,80 @@
+// Copyright 2014 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.
+
+#ifndef V8_DIAGNOSTICS_BASIC_BLOCK_PROFILER_H_
+#define V8_DIAGNOSTICS_BASIC_BLOCK_PROFILER_H_
+
+#include <iosfwd>
+#include <list>
+#include <string>
+#include <vector>
+
+#include "src/base/macros.h"
+#include "src/base/platform/mutex.h"
+#include "src/common/globals.h"
+
+namespace v8 {
+namespace internal {
+
+class BasicBlockProfiler {
+ public:
+  class Data {
+   public:
+    size_t n_blocks() const { return n_blocks_; }
+    const uint32_t* counts() const { return &counts_[0]; }
+
+    void SetCode(std::ostringstream* os);
+    void SetFunctionName(std::unique_ptr<char[]> name);
+    void SetSchedule(std::ostringstream* os);
+    void SetBlockRpoNumber(size_t offset, int32_t block_rpo);
+    intptr_t GetCounterAddress(size_t offset);
+
+   private:
+    friend class BasicBlockProfiler;
+    friend std::ostream& operator<<(std::ostream& os,
+                                    const BasicBlockProfiler::Data& s);
+
+    explicit Data(size_t n_blocks);
+    ~Data() = default;
+
+    V8_EXPORT_PRIVATE void ResetCounts();
+
+    const size_t n_blocks_;
+    std::vector<int32_t> block_rpo_numbers_;
+    std::vector<uint32_t> counts_;
+    std::string function_name_;
+    std::string schedule_;
+    std::string code_;
+    DISALLOW_COPY_AND_ASSIGN(Data);
+  };
+
+  using DataList = std::list<Data*>;
+
+  BasicBlockProfiler() = default;
+  ~BasicBlockProfiler();
+
+  V8_EXPORT_PRIVATE static BasicBlockProfiler* Get();
+  Data* NewData(size_t n_blocks);
+  V8_EXPORT_PRIVATE void ResetCounts();
+
+  const DataList* data_list() { return &data_list_; }
+
+ private:
+  friend V8_EXPORT_PRIVATE std::ostream& operator<<(
+      std::ostream& os, const BasicBlockProfiler& s);
+
+  DataList data_list_;
+  base::Mutex data_list_mutex_;
+
+  DISALLOW_COPY_AND_ASSIGN(BasicBlockProfiler);
+};
+
+V8_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os,
+                                           const BasicBlockProfiler& s);
+std::ostream& operator<<(std::ostream& os, const BasicBlockProfiler::Data& s);
+
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_DIAGNOSTICS_BASIC_BLOCK_PROFILER_H_