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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: set ts=8 sts=2 et sw=2 tw=80:
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef gc_GCTraceFormat_h
#define gc_GCTraceFormat_h

/*
 * Each trace is stored as a 64-bit word with the following format:
 *
 *                 56              48                                         0
 * +----------------+----------------+-----------------------------------------+
 * | Event type     | Optional extra | Optional payload                        |
 * +----------------+----------------+-----------------------------------------+
 */

enum GCTraceEvent {
  // Events
  TraceEventInit,
  TraceEventThingSize,
  TraceEventNurseryAlloc,
  TraceEventTenuredAlloc,
  TraceEventClassInfo,
  TraceEventGroupInfo,
  TraceEventTypeNewScript,
  TraceEventCreateObject,
  TraceEventMinorGCStart,
  TraceEventPromoteToTenured,
  TraceEventMinorGCEnd,
  TraceEventMajorGCStart,
  TraceEventTenuredFinalize,
  TraceEventMajorGCEnd,

  TraceDataAddress,  // following TraceEventPromote
  TraceDataInt,      // following TraceEventClassInfo
  TraceDataString,   // following TraceEventClassInfo

  GCTraceEventCount
};

const unsigned TraceFormatVersion = 1;

const unsigned TracePayloadBits = 48;

const unsigned TraceExtraShift = 48;
const unsigned TraceExtraBits = 8;

const unsigned TraceEventShift = 56;
const unsigned TraceEventBits = 8;

const unsigned NumAllocKinds = 29;
const unsigned LastObjectAllocKind = 13;

#endif