ceph/src/test/librados_test_stub/TestClassHandler.cc

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3
   4 #include "test/librados_test_stub/TestClassHandler.h"
   5 #include "test/librados_test_stub/TestIoCtxImpl.h"
   6 #include <boost/algorithm/string/predicate.hpp>
   7 #include <dlfcn.h>
   8 #include <errno.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include "common/debug.h"
  12 #include "include/ceph_assert.h"
  13
  14 #define dout_context g_ceph_context
  15 #define dout_subsys ceph_subsys_rados
  16
  17 namespace librados {
  18
  19 TestClassHandler::TestClassHandler() {
  20 }
  21
  22 TestClassHandler::~TestClassHandler() {
  23   for (ClassHandles::iterator it = m_class_handles.begin();
  24       it != m_class_handles.end(); ++it) {
  25     dlclose(*it);
  26   }
  27 }
  28
  29 void TestClassHandler::open_class(const std::string& name,
  30                                   const std::string& path) {
  31   void *handle = dlopen(path.c_str(), RTLD_NOW);
  32   if (handle == NULL) {
  33     std::cerr << "Failed to load class: " << name << " (" << path << "): "
  34               << dlerror() << std::endl;
  35     return;
  36   }
  37
  38   // clear any existing error
  39   dlerror();
  40
  41   // initialize
  42   void (*cls_init)() = reinterpret_cast<void (*)()>(
  43     dlsym(handle, "__cls_init"));
  44
  45   char* error = nullptr;
  46   if ((error = dlerror()) != nullptr) {
  47     std::cerr << "Error locating initializer: " << error << std::endl;
  48   } else if (cls_init) {
  49     m_class_handles.push_back(handle);
  50     cls_init();
  51     return;
  52   }
  53
  54   std::cerr << "Class: " << name << " (" << path << ") missing initializer"
  55             << std::endl;
  56   dlclose(handle);
  57 }
  58
  59 void TestClassHandler::open_all_classes() {
  60   ceph_assert(m_class_handles.empty());
  61
  62   const char* env = getenv("CEPH_LIB");
  63   std::string CEPH_LIB(env ? env : "lib");
  64   DIR *dir = ::opendir(CEPH_LIB.c_str());
  65   if (dir == NULL) {
  66     ceph_abort();;
  67   }
  68
  69   std::set<std::string> names;
  70   struct dirent *pde = nullptr;
  71   while ((pde = ::readdir(dir))) {
  72     std::string name(pde->d_name);
  73     if (!boost::algorithm::starts_with(name, "libcls_") ||
  74         !boost::algorithm::ends_with(name, ".so")) {
  75       continue;
  76     }
  77     names.insert(name);
  78   }
  79
  80   for (auto& name : names) {
  81     std::string class_name = name.substr(7, name.size() - 10);
  82     open_class(class_name, CEPH_LIB + "/" + name);
  83   }
  84   closedir(dir);
  85 }
  86
  87 int TestClassHandler::create(const std::string &name, cls_handle_t *handle) {
  88   if (m_classes.find(name) != m_classes.end()) {
  89     std::cerr << "Class " << name << " already exists" << std::endl;
  90     return -EEXIST;
  91   }
  92
  93   SharedClass cls(new Class());
  94   m_classes[name] = cls;
  95   *handle = reinterpret_cast<cls_handle_t>(cls.get());
  96   return 0;
  97 }
  98
  99 int TestClassHandler::create_method(cls_handle_t hclass,
 100                                     const char *name,
 101                                     cls_method_cxx_call_t class_call,
 102                                     cls_method_handle_t *handle) {
 103   Class *cls = reinterpret_cast<Class*>(hclass);
 104   if (cls->methods.find(name) != cls->methods.end()) {
 105     std::cerr << "Class method " << hclass << ":" << name << " already exists"
 106               << std::endl;
 107     return -EEXIST;
 108   }
 109
 110   SharedMethod method(new Method());
 111   method->class_call = class_call;
 112   cls->methods[name] = method;
 113   return 0;
 114 }
 115
 116 cls_method_cxx_call_t TestClassHandler::get_method(const std::string &cls,
 117                                                    const std::string &method) {
 118   Classes::iterator c_it = m_classes.find(cls);
 119   if (c_it == m_classes.end()) {
 120     std::cerr << "Failed to located class " << cls << std::endl;
 121     return NULL;
 122   }
 123
 124   SharedClass scls = c_it->second;
 125   Methods::iterator m_it = scls->methods.find(method);
 126   if (m_it == scls->methods.end()) {
 127     std::cerr << "Failed to located class method" << cls << "." << method
 128               << std::endl;
 129     return NULL;
 130   }
 131   return m_it->second->class_call;
 132 }
 133
 134 TestClassHandler::SharedMethodContext TestClassHandler::get_method_context(
 135     TestIoCtxImpl *io_ctx_impl, const std::string &oid,
 136     const SnapContext &snapc) {
 137   SharedMethodContext ctx(new MethodContext());
 138
 139   // clone to ioctx to provide a firewall for gmock expectations
 140   ctx->io_ctx_impl = io_ctx_impl->clone();
 141   ctx->oid = oid;
 142   ctx->snapc = snapc;
 143   return ctx;
 144 }
 145
 146 int TestClassHandler::create_filter(cls_handle_t hclass,
 147                                     const std::string& name,
 148                                     cls_cxx_filter_factory_t fn)
 149 {
 150   Class *cls = reinterpret_cast<Class*>(hclass);
 151   if (cls->filters.find(name) != cls->filters.end()) {
 152     return -EEXIST;
 153   }
 154   cls->filters[name] = fn;
 155   return 0;
 156 }
 157
 158 TestClassHandler::MethodContext::~MethodContext() {
 159   io_ctx_impl->put();
 160 }
 161
 162 } // namespace librados