js/src/frontend/JumpList.cpp
author Tooru Fujisawa <arai_a@mac.com>
Sat, 01 Dec 2018 04:52:05 +0900
changeset 505471 66eb1f485c1a3ea81372758bc92292c9428b17cd
parent 505464 e4712449ba4303cef134ba0b3f1bea13fbd50c4a
child 513561 731a43e841abcdb19ffc55151cb60c49cd8c0c84
permissions -rw-r--r--
Bug 1511393 - Use c-basic-offset: 2 in Emacs mode line for C/C++ code. r=nbp

/* -*- 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/. */

#include "frontend/JumpList.h"

#include "vm/BytecodeUtil.h"

using namespace js;
using namespace js::frontend;

void JumpList::push(jsbytecode* code, ptrdiff_t jumpOffset) {
  SET_JUMP_OFFSET(&code[jumpOffset], offset - jumpOffset);
  offset = jumpOffset;
}

void JumpList::patchAll(jsbytecode* code, JumpTarget target) {
  ptrdiff_t delta;
  for (ptrdiff_t jumpOffset = offset; jumpOffset != -1; jumpOffset += delta) {
    jsbytecode* pc = &code[jumpOffset];
    MOZ_ASSERT(IsJumpOpcode(JSOp(*pc)) || JSOp(*pc) == JSOP_LABEL);
    delta = GET_JUMP_OFFSET(pc);
    MOZ_ASSERT(delta < 0);
    ptrdiff_t span = target.offset - jumpOffset;
    SET_JUMP_OFFSET(pc, span);
  }
}