C++ (Cpp) IncomingBranch示例

示例#1

文件： srcdb.cpp 项目： Dream-Seeker/hhvm

void SrcRec::chainFrom(IncomingBranch br) {
  assert(br.type() == IncomingBranch::Tag::ADDR ||
         mcg->code.isValidCodeAddress(br.toSmash()));
  TCA destAddr = getTopTranslation();
  m_incomingBranches.push_back(br);
  TRACE(1, "SrcRec(%p)::chainFrom %p -> %p (type %d); %zd incoming branches\n",
        this,
        br.toSmash(), destAddr, br.type(), m_incomingBranches.size());
  br.patch(destAddr);
}

示例#2

文件： srcdb.cpp 项目： BiggDaddy/hhvm

void SrcRec::patch(IncomingBranch branch, TCA dest) {
  switch (branch.type()) {
  case IncomingBranch::Tag::JMP: {
    JIT::smashJmp(branch.toSmash(), dest);
    break;
  }

  case IncomingBranch::Tag::JCC: {
    JIT::smashJcc(branch.toSmash(), dest);
    break;
  }

  case IncomingBranch::Tag::ADDR:
    // Note that this effectively ignores a
    atomic_release_store(reinterpret_cast<TCA*>(branch.toSmash()), dest);
  }
}

示例#3

文件： srcdb.cpp 项目： DoomCircus/hhvm

void SrcRec::patch(IncomingBranch branch, TCA dest) {
  switch (branch.type()) {
  case IncomingBranch::Tag::JMP: {
    JIT::smashJmp(branch.toSmash(), dest);
    break;
  }

  case IncomingBranch::Tag::JCC: {
    JIT::smashJcc(branch.toSmash(), dest);
    break;
  }

  case IncomingBranch::Tag::ADDR: {
    // Note that this effectively ignores a
    TCA* addr = reinterpret_cast<TCA*>(branch.toSmash());
    assert_address_is_atomically_accessible(addr);
    *addr = dest;
    break;
  }
  }
}

示例#4

文件： srcdb.cpp 项目： shantanusharma/hhvm

void SrcRec::chainFrom(IncomingBranch br) {
  assertx(br.type() == IncomingBranch::Tag::ADDR ||
          tc::isValidCodeAddress(br.toSmash()));
  TCA destAddr = getTopTranslation();
  m_incomingBranches.push_back(br);
  TRACE(1, "SrcRec(%p)::chainFrom %p -> %p (type %d); %zd incoming branches\n",
        this,
        br.toSmash(), destAddr, static_cast<int>(br.type()),
        m_incomingBranches.size());
  br.patch(destAddr);

  if (RuntimeOption::EvalEnableReusableTC) {
    tc::recordJump(br.toSmash(), this);
  }
}

示例#5

文件： srcdb.cpp 项目： TingoZhou/hiphop-php

void SrcRec::patch(IncomingBranch branch, TCA dest) {
  switch (branch.type()) {
  case IncomingBranch::Tag::JMP: {
    auto& a = tx64->getAsmFor(branch.toSmash());
    CodeCursor cg(a, branch.toSmash());
    TranslatorX64::smashJmp(a, branch.toSmash(), dest);
    break;
  }

  case IncomingBranch::Tag::JCC: {
    // patch destination, but preserve the condition code
    int32_t delta = safe_cast<int32_t>((dest - branch.toSmash()) - kJmpccLen);
    int32_t* addr = (int32_t*)(branch.toSmash() + kJmpccLen - 4);
    atomic_release_store(addr, delta);
    break;
  }

  case IncomingBranch::Tag::ADDR:
    // Note that this effectively ignores a
    atomic_release_store(reinterpret_cast<TCA*>(branch.toSmash()), dest);
  }
}