test/core/end2end/fuzzers/client_fuzzer.cc

   1 /*
   2  *
   3  * Copyright 2016 gRPC authors.
   4  *
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at
   8  *
   9  *     http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16  *
  17  */
  18
  19 #include <string.h>
  20
  21 #include <grpc/grpc.h>
  22 #include <grpc/support/alloc.h>
  23 #include <grpc/support/string_util.h>
  24
  25 #include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
  26 #include "src/core/lib/iomgr/executor.h"
  27 #include "src/core/lib/slice/slice_internal.h"
  28 #include "src/core/lib/surface/channel.h"
  29 #include "test/core/util/mock_endpoint.h"
  30
  31 bool squelch = true;
  32 bool leak_check = true;
  33
  34 static void discard_write(grpc_slice /*slice*/) {}
  35
  36 static void* tag(int n) { return (void*)static_cast<uintptr_t>(n); }
  37
  38 static void dont_log(gpr_log_func_args* /*args*/) {}
  39
  40 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
  41   grpc_test_only_set_slice_hash_seed(0);
  42   if (squelch) gpr_set_log_function(dont_log);
  43   grpc_init();
  44   {
  45     grpc_core::ExecCtx exec_ctx;
  46     grpc_core::Executor::SetThreadingAll(false);
  47
  48     grpc_resource_quota* resource_quota =
  49         grpc_resource_quota_create("client_fuzzer");
  50     grpc_endpoint* mock_endpoint =
  51         grpc_mock_endpoint_create(discard_write, resource_quota);
  52     grpc_resource_quota_unref_internal(resource_quota);
  53
  54     grpc_completion_queue* cq = grpc_completion_queue_create_for_next(nullptr);
  55     grpc_transport* transport =
  56         grpc_create_chttp2_transport(nullptr, mock_endpoint, true);
  57     grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
  58
  59     grpc_arg authority_arg = grpc_channel_arg_string_create(
  60         const_cast<char*>(GRPC_ARG_DEFAULT_AUTHORITY),
  61         const_cast<char*>("test-authority"));
  62     grpc_channel_args* args =
  63         grpc_channel_args_copy_and_add(nullptr, &authority_arg, 1);
  64     grpc_channel* channel = grpc_channel_create(
  65         "test-target", args, GRPC_CLIENT_DIRECT_CHANNEL, transport);
  66     grpc_channel_args_destroy(args);
  67     grpc_slice host = grpc_slice_from_static_string("localhost");
  68     grpc_call* call = grpc_channel_create_call(
  69         channel, nullptr, 0, cq, grpc_slice_from_static_string("/foo"), &host,
  70         gpr_inf_future(GPR_CLOCK_REALTIME), nullptr);
  71
  72     grpc_metadata_array initial_metadata_recv;
  73     grpc_metadata_array_init(&initial_metadata_recv);
  74     grpc_byte_buffer* response_payload_recv = nullptr;
  75     grpc_metadata_array trailing_metadata_recv;
  76     grpc_metadata_array_init(&trailing_metadata_recv);
  77     grpc_status_code status;
  78     grpc_slice details = grpc_empty_slice();
  79
  80     grpc_op ops[6];
  81     memset(ops, 0, sizeof(ops));
  82     grpc_op* op = ops;
  83     op->op = GRPC_OP_SEND_INITIAL_METADATA;
  84     op->data.send_initial_metadata.count = 0;
  85     op->flags = 0;
  86     op->reserved = nullptr;
  87     op++;
  88     op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
  89     op->flags = 0;
  90     op->reserved = nullptr;
  91     op++;
  92     op->op = GRPC_OP_RECV_INITIAL_METADATA;
  93     op->data.recv_initial_metadata.recv_initial_metadata =
  94         &initial_metadata_recv;
  95     op->flags = 0;
  96     op->reserved = nullptr;
  97     op++;
  98     op->op = GRPC_OP_RECV_MESSAGE;
  99     op->data.recv_message.recv_message = &response_payload_recv;
 100     op->flags = 0;
 101     op->reserved = nullptr;
 102     op++;
 103     op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
 104     op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
 105     op->data.recv_status_on_client.status = &status;
 106     op->data.recv_status_on_client.status_details = &details;
 107     op->flags = 0;
 108     op->reserved = nullptr;
 109     op++;
 110     grpc_call_error error =
 111         grpc_call_start_batch(call, ops, (size_t)(op - ops), tag(1), nullptr);
 112     int requested_calls = 1;
 113     GPR_ASSERT(GRPC_CALL_OK == error);
 114
 115     grpc_mock_endpoint_put_read(
 116         mock_endpoint, grpc_slice_from_copied_buffer((const char*)data, size));
 117
 118     grpc_event ev;
 119     while (1) {
 120       grpc_core::ExecCtx::Get()->Flush();
 121       ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
 122                                       nullptr);
 123       switch (ev.type) {
 124         case GRPC_QUEUE_TIMEOUT:
 125           goto done;
 126         case GRPC_QUEUE_SHUTDOWN:
 127           break;
 128         case GRPC_OP_COMPLETE:
 129           requested_calls--;
 130           break;
 131       }
 132     }
 133
 134   done:
 135     if (requested_calls) {
 136       grpc_call_cancel(call, nullptr);
 137     }
 138     for (int i = 0; i < requested_calls; i++) {
 139       ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
 140                                       nullptr);
 141       GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
 142     }
 143     grpc_completion_queue_shutdown(cq);
 144     for (int i = 0; i < requested_calls; i++) {
 145       ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
 146                                       nullptr);
 147       GPR_ASSERT(ev.type == GRPC_QUEUE_SHUTDOWN);
 148     }
 149     grpc_call_unref(call);
 150     grpc_completion_queue_destroy(cq);
 151     grpc_metadata_array_destroy(&initial_metadata_recv);
 152     grpc_metadata_array_destroy(&trailing_metadata_recv);
 153     grpc_slice_unref(details);
 154     grpc_channel_destroy(channel);
 155     if (response_payload_recv != nullptr) {
 156       grpc_byte_buffer_destroy(response_payload_recv);
 157     }
 158   }
 159   grpc_shutdown_blocking();
 160   return 0;
 161 }