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/security/credentials/credentials.h"
  28 #include "src/core/lib/slice/slice_internal.h"
  29 #include "src/core/lib/surface/channel.h"
  30 #include "test/core/util/memory_counters.h"
  31 #include "test/core/util/mock_endpoint.h"
  32
  33 bool squelch = true;
  34 bool leak_check = true;
  35
  36 static void discard_write(grpc_slice slice) {}
  37
  38 static void* tag(int n) { return (void*)static_cast<uintptr_t>(n); }
  39
  40 static void dont_log(gpr_log_func_args* args) {}
  41
  42 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
  43   grpc_test_only_set_slice_hash_seed(0);
  44   if (squelch) gpr_set_log_function(dont_log);
  45   grpc_core::testing::LeakDetector leak_detector(leak_check);
  46   grpc_init();
  47   grpc_test_only_control_plane_credentials_force_init();
  48   {
  49     grpc_core::ExecCtx exec_ctx;
  50     grpc_core::Executor::SetThreadingAll(false);
  51
  52     grpc_resource_quota* resource_quota =
  53         grpc_resource_quota_create("client_fuzzer");
  54     grpc_endpoint* mock_endpoint =
  55         grpc_mock_endpoint_create(discard_write, resource_quota);
  56     grpc_resource_quota_unref_internal(resource_quota);
  57
  58     grpc_completion_queue* cq = grpc_completion_queue_create_for_next(nullptr);
  59     grpc_transport* transport =
  60         grpc_create_chttp2_transport(nullptr, mock_endpoint, true);
  61     grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
  62
  63     grpc_arg authority_arg = grpc_channel_arg_string_create(
  64         const_cast<char*>(GRPC_ARG_DEFAULT_AUTHORITY),
  65         const_cast<char*>("test-authority"));
  66     grpc_channel_args* args =
  67         grpc_channel_args_copy_and_add(nullptr, &authority_arg, 1);
  68     grpc_channel* channel = grpc_channel_create(
  69         "test-target", args, GRPC_CLIENT_DIRECT_CHANNEL, transport);
  70     grpc_channel_args_destroy(args);
  71     grpc_slice host = grpc_slice_from_static_string("localhost");
  72     grpc_call* call = grpc_channel_create_call(
  73         channel, nullptr, 0, cq, grpc_slice_from_static_string("/foo"), &host,
  74         gpr_inf_future(GPR_CLOCK_REALTIME), nullptr);
  75
  76     grpc_metadata_array initial_metadata_recv;
  77     grpc_metadata_array_init(&initial_metadata_recv);
  78     grpc_byte_buffer* response_payload_recv = nullptr;
  79     grpc_metadata_array trailing_metadata_recv;
  80     grpc_metadata_array_init(&trailing_metadata_recv);
  81     grpc_status_code status;
  82     grpc_slice details = grpc_empty_slice();
  83
  84     grpc_op ops[6];
  85     memset(ops, 0, sizeof(ops));
  86     grpc_op* op = ops;
  87     op->op = GRPC_OP_SEND_INITIAL_METADATA;
  88     op->data.send_initial_metadata.count = 0;
  89     op->flags = 0;
  90     op->reserved = nullptr;
  91     op++;
  92     op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
  93     op->flags = 0;
  94     op->reserved = nullptr;
  95     op++;
  96     op->op = GRPC_OP_RECV_INITIAL_METADATA;
  97     op->data.recv_initial_metadata.recv_initial_metadata =
  98         &initial_metadata_recv;
  99     op->flags = 0;
 100     op->reserved = nullptr;
 101     op++;
 102     op->op = GRPC_OP_RECV_MESSAGE;
 103     op->data.recv_message.recv_message = &response_payload_recv;
 104     op->flags = 0;
 105     op->reserved = nullptr;
 106     op++;
 107     op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
 108     op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
 109     op->data.recv_status_on_client.status = &status;
 110     op->data.recv_status_on_client.status_details = &details;
 111     op->flags = 0;
 112     op->reserved = nullptr;
 113     op++;
 114     grpc_call_error error =
 115         grpc_call_start_batch(call, ops, (size_t)(op - ops), tag(1), nullptr);
 116     int requested_calls = 1;
 117     GPR_ASSERT(GRPC_CALL_OK == error);
 118
 119     grpc_mock_endpoint_put_read(
 120         mock_endpoint, grpc_slice_from_copied_buffer((const char*)data, size));
 121
 122     grpc_event ev;
 123     while (1) {
 124       grpc_core::ExecCtx::Get()->Flush();
 125       ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
 126                                       nullptr);
 127       switch (ev.type) {
 128         case GRPC_QUEUE_TIMEOUT:
 129           goto done;
 130         case GRPC_QUEUE_SHUTDOWN:
 131           break;
 132         case GRPC_OP_COMPLETE:
 133           requested_calls--;
 134           break;
 135       }
 136     }
 137
 138   done:
 139     if (requested_calls) {
 140       grpc_call_cancel(call, nullptr);
 141     }
 142     for (int i = 0; i < requested_calls; i++) {
 143       ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
 144                                       nullptr);
 145       GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
 146     }
 147     grpc_completion_queue_shutdown(cq);
 148     for (int i = 0; i < requested_calls; i++) {
 149       ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
 150                                       nullptr);
 151       GPR_ASSERT(ev.type == GRPC_QUEUE_SHUTDOWN);
 152     }
 153     grpc_call_unref(call);
 154     grpc_completion_queue_destroy(cq);
 155     grpc_metadata_array_destroy(&initial_metadata_recv);
 156     grpc_metadata_array_destroy(&trailing_metadata_recv);
 157     grpc_slice_unref(details);
 158     grpc_channel_destroy(channel);
 159     if (response_payload_recv != nullptr) {
 160       grpc_byte_buffer_destroy(response_payload_recv);
 161     }
 162   }
 163   grpc_test_only_control_plane_credentials_destroy();
 164   grpc_shutdown_blocking();
 165   return 0;
 166 }