mozglue/baseprofiler/lul/LulDwarfSummariser.h
author Masayuki Nakano <masayuki@d-toybox.com>
Sun, 16 Jan 2022 06:21:17 +0000
changeset 604634 9ef0614a59629916c1e182eb8eda055b0b0e8b32
parent 476737 5e7817b385fcc3e7256985b5e6978cd0ac2ea004
permissions -rw-r--r--
Bug 1749299 - Make `HTMLEditor::HandleInsertLinefeed()` stop handling it if insertion point cannot have text nodes r=m_kato Ideally, it should not be called when the editor cannot insert new text node. However, the callers are complicated. Therefore, let's check in it for avoiding making the callers more complicated. Fortunately, this is not realistic path for normal web apps. Therefore, the compatibility of the behavior is not matter. That's the reason why this patch does not have a test comparing the result. Differential Revision: https://phabricator.services.mozilla.com/D135826

/* -*- 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 LulDwarfSummariser_h
#define LulDwarfSummariser_h

#include "LulMainInt.h"

namespace lul {

class Summariser {
 public:
  Summariser(SecMap* aSecMap, uintptr_t aTextBias, void (*aLog)(const char*));

  virtual void Entry(uintptr_t aAddress, uintptr_t aLength);
  virtual void End();

  // Tell the summariser that the value for |aNewReg| at |aAddress| is
  // recovered using the LExpr that can be constructed using the
  // components |how|, |oldReg| and |offset|.  The summariser will
  // inspect the components and may reject them for various reasons,
  // but the hope is that it will find them acceptable and record this
  // rule permanently.
  virtual void Rule(uintptr_t aAddress, int aNewReg, LExprHow how,
                    int16_t oldReg, int64_t offset);

  virtual uint32_t AddPfxInstr(PfxInstr pfxi);

  // Send output to the logging sink, for debugging.
  virtual void Log(const char* str) { mLog(str); }

 private:
  // The SecMap in which we park the finished summaries (RuleSets) and
  // also any PfxInstrs derived from Dwarf expressions.
  SecMap* mSecMap;

  // Running state for the current summary (RuleSet) under construction.
  RuleSet mCurrRules;

  // The start of the address range to which the RuleSet under
  // construction applies.
  uintptr_t mCurrAddr;

  // The highest address, plus one, for which the RuleSet under
  // construction could possibly apply.  If there are no further
  // incoming events then mCurrRules will eventually be emitted
  // as-is, for the range mCurrAddr.. mMax1Addr - 1, if that is
  // nonempty.
  uintptr_t mMax1Addr;

  // The bias value (to add to the SVMAs, to get AVMAs) to be used
  // when adding entries into mSecMap.
  uintptr_t mTextBias;

  // A logging sink, for debugging.
  void (*mLog)(const char* aFmt);
};

}  // namespace lul

#endif  // LulDwarfSummariser_h