src/ppapi/native_client/src/trusted/plugin/nacl_subprocess.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ppapi/native_client/src/trusted/plugin/nacl_subprocess.h"
   6
   7 #include <stdarg.h>
   8
   9 #include "native_client/src/shared/srpc/nacl_srpc.h"
  10 #include "ppapi/native_client/src/trusted/plugin/plugin_error.h"
  11 #include "ppapi/native_client/src/trusted/plugin/srpc_params.h"
  12
  13 namespace plugin {
  14
  15 std::string NaClSubprocess::detailed_description() const {
  16   std::stringstream ss;
  17   ss << description()
  18      << "={ this=" << static_cast<const void*>(this)
  19      << ", srpc_client=" << static_cast<void*>(srpc_client_.get())
  20      << ", service_runtime=" << static_cast<void*>(service_runtime_.get())
  21      << " }";
  22   return ss.str();
  23 }
  24
  25 // Shutdown the socket connection and service runtime, in that order.
  26 void NaClSubprocess::Shutdown() {
  27   srpc_client_.reset(NULL);
  28   if (service_runtime_.get() != NULL) {
  29     service_runtime_->Shutdown();
  30     service_runtime_.reset(NULL);
  31   }
  32 }
  33
  34 NaClSubprocess::~NaClSubprocess() {
  35   Shutdown();
  36 }
  37
  38 bool NaClSubprocess::StartSrpcServices() {
  39   srpc_client_.reset(service_runtime_->SetupAppChannel());
  40   return NULL != srpc_client_.get();
  41 }
  42
  43 bool NaClSubprocess::InvokeSrpcMethod(const std::string& method_name,
  44                                       const std::string& input_signature,
  45                                       SrpcParams* params,
  46                                       ...) {
  47   va_list vl;
  48   va_start(vl, params);
  49   bool result = VInvokeSrpcMethod(method_name, input_signature, params, vl);
  50   va_end(vl);
  51   return result;
  52 }
  53
  54 bool NaClSubprocess::VInvokeSrpcMethod(const std::string& method_name,
  55                                        const std::string& input_signature,
  56                                        SrpcParams* params,
  57                                        va_list vl) {
  58   if (NULL == srpc_client_.get()) {
  59     PLUGIN_PRINTF(("VInvokeSrpcMethod (no srpc_client_)\n"));
  60     return false;
  61   }
  62   if (!srpc_client_->HasMethod(method_name)) {
  63     PLUGIN_PRINTF(("VInvokeSrpcMethod (no %s method found)\n",
  64                    method_name.c_str()));
  65     return false;
  66   }
  67   if (!srpc_client_->InitParams(method_name, params)) {
  68     PLUGIN_PRINTF(("VInvokeSrpcMethod (InitParams failed)\n"));
  69     return false;
  70   }
  71   // Marshall inputs.
  72   for (size_t i = 0; i < input_signature.length(); ++i) {
  73     char c = input_signature[i];
  74     // Only handle the limited number of SRPC types used for PNaCl.
  75     // Add more as needed.
  76     switch (c) {
  77       default:
  78         PLUGIN_PRINTF(("PnaclSrpcLib::InvokeSrpcMethod unhandled type: %c\n",
  79                        c));
  80         return false;
  81       case NACL_SRPC_ARG_TYPE_BOOL: {
  82         int input = va_arg(vl, int);
  83         params->ins()[i]->u.bval = input;
  84         break;
  85       }
  86       case NACL_SRPC_ARG_TYPE_DOUBLE: {
  87         double input = va_arg(vl, double);
  88         params->ins()[i]->u.dval = input;
  89         break;
  90       }
  91       case NACL_SRPC_ARG_TYPE_CHAR_ARRAY: {
  92         // SrpcParam's destructor *should* free the allocated array
  93         const char* orig_arr = va_arg(vl, const char*);
  94         size_t len = va_arg(vl, size_t);
  95         char* input = (char *)malloc(len);
  96         if (!input) {
  97           PLUGIN_PRINTF(("VInvokeSrpcMethod (allocation failure)\n"));
  98           return false;
  99         }
 100         memcpy(input, orig_arr, len);
 101         params->ins()[i]->arrays.carr = input;
 102         params->ins()[i]->u.count = static_cast<nacl_abi_size_t>(len);
 103         break;
 104       }
 105       case NACL_SRPC_ARG_TYPE_HANDLE: {
 106         NaClSrpcImcDescType input = va_arg(vl, NaClSrpcImcDescType);
 107         params->ins()[i]->u.hval = input;
 108         break;
 109       }
 110       case NACL_SRPC_ARG_TYPE_INT: {
 111         int32_t input = va_arg(vl, int32_t);
 112         params->ins()[i]->u.ival = input;
 113         break;
 114       }
 115       case NACL_SRPC_ARG_TYPE_LONG: {
 116         int64_t input = va_arg(vl, int64_t);
 117         params->ins()[i]->u.lval = input;
 118         break;
 119       }
 120       case NACL_SRPC_ARG_TYPE_STRING: {
 121         // SrpcParam's destructor *should* free the dup'ed string.
 122         const char* orig_str = va_arg(vl, const char*);
 123         char* input = strdup(orig_str);
 124         if (!input) {
 125           PLUGIN_PRINTF(("VInvokeSrpcMethod (allocation failure)\n"));
 126           return false;
 127         }
 128         params->ins()[i]->arrays.str = input;
 129         break;
 130       }
 131     }
 132   }
 133   return srpc_client_->Invoke(method_name, params);
 134 }
 135
 136 }  // namespace plugin