hhvm/hphp/runtime/vm/jit/func-prologue.cpp at master · MaxSem/hhvm · GitHub

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/*
   +----------------------------------------------------------------------+
   | HipHop for PHP                                                       |
   +----------------------------------------------------------------------+
   | Copyright (c) 2010-2016 Facebook, Inc. (http://www.facebook.com)     |
   +----------------------------------------------------------------------+
   | This source file is subject to version 3.01 of the PHP license,      |
   | that is bundled with this package in the file LICENSE, and is        |
   | available through the world-wide-web at the following url:           |
   | http://www.php.net/license/3_01.txt                                  |
   | If you did not receive a copy of the PHP license and are unable to   |
   | obtain it through the world-wide-web, please send a note to          |
   | license@php.net so we can mail you a copy immediately.               |
   +----------------------------------------------------------------------+
*/

#include "hphp/runtime/vm/jit/func-prologue.h"

#include "hphp/runtime/vm/func.h"
#include "hphp/runtime/vm/srckey.h"

#include "hphp/runtime/vm/jit/code-cache.h"
#include "hphp/runtime/vm/jit/code-gen-helpers.h"
#include "hphp/runtime/vm/jit/func-guard.h"
#include "hphp/runtime/vm/jit/irgen-func-prologue.h"
#include "hphp/runtime/vm/jit/irgen.h"
#include "hphp/runtime/vm/jit/irlower.h"
#include "hphp/runtime/vm/jit/mc-generator.h"
#include "hphp/runtime/vm/jit/phys-reg.h"
#include "hphp/runtime/vm/jit/relocation.h"
#include "hphp/runtime/vm/jit/srcdb.h"
#include "hphp/runtime/vm/jit/translator.h"
#include "hphp/runtime/vm/jit/types.h"
#include "hphp/runtime/vm/jit/unique-stubs.h"
#include "hphp/runtime/vm/jit/vasm-emit.h"
#include "hphp/runtime/vm/jit/vasm-instr.h"
#include "hphp/runtime/vm/jit/vasm.h"

#include "hphp/util/arch.h"
#include "hphp/util/asm-x64.h"
#include "hphp/util/data-block.h"
#include "hphp/util/growable-vector.h"
#include "hphp/util/immed.h"

namespace HPHP { namespace jit {

///////////////////////////////////////////////////////////////////////////////

namespace {

///////////////////////////////////////////////////////////////////////////////

TransContext prologue_context(TransID transID,
                              TransKind kind,
                              const Func* func,
                              Offset entry) {
  return TransContext(
    transID,
    kind,
    TransFlags{},
    SrcKey{func, entry, SrcKey::PrologueTag{}},
    FPInvOffset{func->numSlotsInFrame()}
  );
}

///////////////////////////////////////////////////////////////////////////////

}

///////////////////////////////////////////////////////////////////////////////

TCA genFuncPrologue(TransID transID, TransKind kind, Func* func, int argc,
                    CodeCache::View code, CGMeta& fixups) {
  auto context = prologue_context(transID, kind, func,
                                  func->getEntryForNumArgs(argc));
  IRUnit unit{context};
  irgen::IRGS env{unit};

  auto& cb = code.main();

  // Dump the func guard in the TC before anything else.
  emitFuncGuard(func, cb, fixups);
  auto const start = cb.frontier();

  irgen::emitFuncPrologue(env, argc, transID);
  irgen::sealUnit(env);

  auto vunit = irlower::lowerUnit(env.unit, CodeKind::CrossTrace);
  emitVunit(*vunit, env.unit, code, fixups);

  return start;
}

TCA genFuncBodyDispatch(Func* func, const DVFuncletsVec& dvs,
                        CodeCache::View code) {
  auto context = prologue_context(kInvalidTransID, TransKind::Live,
                                  func, func->base());
  IRUnit unit{context};
  irgen::IRGS env{unit};

  irgen::emitFuncBodyDispatch(env, dvs);
  irgen::sealUnit(env);

  CGMeta fixups;
  auto vunit = irlower::lowerUnit(env.unit, CodeKind::CrossTrace);

  auto& main = code.main();
  auto const start = main.frontier();

  emitVunit(*vunit, env.unit, code, fixups);

  auto metaLock = mcg->lockMetadata();
  if (RuntimeOption::EvalPerfRelocate) {
    GrowableVector<IncomingBranch> ibs;
    auto& frozen = code.frozen();
    recordPerfRelocMap(start, main.frontier(),
                       frozen.frontier(), frozen.frontier(),
                       SrcKey { func, dvs[0].second, false },
                       0, ibs, fixups);
  }
  fixups.process(nullptr);

  return start;
}

///////////////////////////////////////////////////////////////////////////////

}}