Revert "Reland "Linux perf tool support update + refactoring." (r22118)"

src/perf-jit.h

-// Copyright 2014 the V8 project authors. 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 Google Inc. 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.
-
-#ifndef V8_PERF_JIT_H_
-#define V8_PERF_JIT_H_
-
-#include "src/v8.h"
-
-namespace v8 {
-namespace internal {
-
-// TODO(jarin) For now, we disable perf integration on Android because of a
-// build problem - when building the snapshot with AOSP, librt is not
-// available, so we cannot use the clock_gettime function. To fix this, we
-// should thread through the V8_LIBRT_NOT_AVAILABLE flag here and only disable
-// the perf integration when this flag is present (the perf integration is not
-// needed when generating snapshot, so it is fine to ifdef it away).
-
-#if defined(__linux__) && !defined(ANDROID)
-
-// Linux perf tool logging support
-class PerfJitLogger : public CodeEventLogger {
- public:
-  PerfJitLogger();
-  virtual ~PerfJitLogger();
-
-  virtual void CodeMoveEvent(Address from, Address to);
-  virtual void CodeDeleteEvent(Address from);
-  virtual void CodeDisableOptEvent(Code* code, SharedFunctionInfo* shared) { }
-  virtual void SnapshotPositionEvent(Address addr, int pos);
-
- private:
-  uint64_t GetTimestamp();
-  virtual void LogRecordedBuffer(Code* code,
-                                 SharedFunctionInfo* shared,
-                                 const char* name,
-                                 int length);
-
-  // Extension added to V8 log file name to get the low-level log name.
-  static const char kFilenameFormatString[];
-  static const int kFilenameBufferPadding;
-
-  static const char kTraceClockDevice[];
-  static const int kClockInvalid = -1;
-  static const uint64_t kNsecPerSec = 1000000000;
-
-  // File buffer size of the low-level log. We don't use the default to
-  // minimize the associated overhead.
-  static const int kLogBufferSize = 2 * MB;
-
-  void LogWriteBytes(const char* bytes, int size);
-  void LogWriteHeader();
-
-  static const uint32_t kElfMachIA32 = 3;
-  static const uint32_t kElfMachX64 = 62;
-  static const uint32_t kElfMachARM = 40;
-  static const uint32_t kElfMachMIPS = 10;
-
-  uint32_t GetElfMach() {
-#if V8_TARGET_ARCH_IA32
-    return kElfMachIA32;
-#elif V8_TARGET_ARCH_X64
-    return kElfMachX64;
-#elif V8_TARGET_ARCH_ARM
-    return kElfMachARM;
-#elif V8_TARGET_ARCH_MIPS
-    return kElfMachMIPS;
-#else
-    UNIMPLEMENTED();
-    return 0;
-#endif
-  }
-
-  FILE* perf_output_handle_;
-  int clock_fd_;
-  int clock_id_;
-  uint64_t code_index_;
-};
-
-#else
-
-// PerfJitLogger is only implemented on Linux
-class PerfJitLogger : public CodeEventLogger {
- public:
-  virtual void CodeMoveEvent(Address from, Address to) {
-    UNIMPLEMENTED();
-  }
-
-  virtual void CodeDeleteEvent(Address from) {
-    UNIMPLEMENTED();
-  }
-
-  virtual void CodeDisableOptEvent(Code* code, SharedFunctionInfo* shared) {
-    UNIMPLEMENTED();
-  }
-
-  virtual void SnapshotPositionEvent(Address addr, int pos) {
-    UNIMPLEMENTED();
-  }
-
-  virtual void LogRecordedBuffer(Code* code,
-                                 SharedFunctionInfo* shared,
-                                 const char* name,
-                                 int length) {
-    UNIMPLEMENTED();
-  }
-};
-
-#endif  // defined(__linux__) && !defined(ANDROID)
-
-} }   // namespace v8::internal
-#endif