hphp/runtime/ext/extension.cpp

   1 /*
   2    +----------------------------------------------------------------------+
   3    | HipHop for PHP                                                       |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 2010-present Facebook, Inc. (http://www.facebook.com)  |
   6    | Copyright (c) 1997-2010 The PHP Group                                |
   7    +----------------------------------------------------------------------+
   8    | This source file is subject to version 3.01 of the PHP license,      |
   9    | that is bundled with this package in the file LICENSE, and is        |
  10    | available through the world-wide-web at the following url:           |
  11    | http://www.php.net/license/3_01.txt                                  |
  12    | If you did not receive a copy of the PHP license and are unable to   |
  13    | obtain it through the world-wide-web, please send a note to          |
  14    | license@php.net so we can mail you a copy immediately.               |
  15    +----------------------------------------------------------------------+
  16 */
  17 #include "hphp/runtime/ext/extension.h"
  18 #include "hphp/runtime/ext/extension-registry.h"
  19
  20 #include <cstdio>
  21
  22 #include "hphp/util/exception.h"
  23 #include "hphp/util/assertions.h"
  24 #include "hphp/runtime/ext/apache/ext_apache.h"
  25 #include "hphp/runtime/ext/apc/ext_apc.h"
  26 #include "hphp/runtime/ext/string/ext_string.h"
  27 #include "hphp/runtime/base/program-functions.h"
  28 #include "hphp/runtime/base/config.h"
  29 #include "hphp/runtime/vm/runtime.h"
  30 #include "hphp/runtime/vm/unit.h"
  31 #include "hphp/system/systemlib.h"
  32
  33 #include <map>
  34 #include <vector>
  35
  36 namespace HPHP {
  37 ///////////////////////////////////////////////////////////////////////////////
  38 // Global systemlib extensions implemented entirely in PHP
  39
  40 IMPLEMENT_DEFAULT_EXTENSION_VERSION(redis, NO_EXTENSION_VERSION_YET);
  41
  42 ///////////////////////////////////////////////////////////////////////////////
  43
  44 Extension::Extension(const char* name, const char* version /* = "" */)
  45     : m_name(name)
  46     , m_version(version ? version : "") {
  47   ExtensionRegistry::registerExtension(this);
  48 }
  49
  50 const static std::string
  51   s_systemlibPhpName("systemlib.php"),
  52   s_systemlibHhasName("systemlib.hhas.");
  53
  54 bool Extension::IsSystemlibPath(const std::string& name) {
  55   return !name.compare(0, 2, "/:");
  56 }
  57
  58 void Extension::CompileSystemlib(const std::string &slib,
  59                                  const std::string &name) {
  60   // TODO (t3443556) Bytecode repo compilation expects that any errors
  61   // encountered during systemlib compilation have valid filename pointers
  62   // which won't be the case for now unless these pointers are long-lived.
  63   auto const moduleName = makeStaticString("/:" + name);
  64   auto const unit = compile_systemlib_string(slib.c_str(), slib.size(),
  65                                              moduleName->data());
  66   always_assert_flog(unit, "No unit created for systemlib `{}'", moduleName);
  67
  68   const StringData* msg;
  69   int line;
  70   if (unit->compileTimeFatal(msg, line) ||
  71       unit->parseFatal(msg, line)) {
  72     std::fprintf(stderr, "Systemlib `%s' contains a fataling unit: %s, %d\n",
  73                  name.c_str(),
  74                  msg->data(),
  75                  line);
  76     _Exit(0);
  77   }
  78
  79   unit->merge();
  80   SystemLib::addPersistentUnit(unit);
  81 }
  82
  83 /**
  84  * Loads a named systemlib section from the main binary (or DSO)
  85  * using the label "ext.{hash(name)}"
  86  *
  87  * If {name} is not passed, then {m_name} is assumed.
  88  */
  89 void Extension::loadSystemlib(const std::string& name) {
  90   std::string n = name.empty() ?
  91     std::string(m_name.data(), m_name.size()) : name;
  92 #ifdef _MSC_VER
  93   std::string section("ext_");
  94 #else
  95   std::string section("ext.");
  96 #endif
  97   section += HHVM_FN(md5)(n, false).substr(0, 12).data();
  98   std::string hhas;
  99   std::string slib = get_systemlib(&hhas, section, m_dsoName);
 100   if (!slib.empty()) {
 101     std::string phpname = s_systemlibPhpName + n;
 102     CompileSystemlib(slib, phpname);
 103   }
 104   if (!hhas.empty()) {
 105     std::string hhasname = s_systemlibHhasName + n;
 106     CompileSystemlib(hhas, hhasname);
 107   }
 108 }
 109
 110 /////////////////////////////////////////////////////////////////////////////
 111 } // namespace HPHP