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/*
*
* Copyright 2016 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <grpc/grpc.h>
#include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
#include "src/core/lib/iomgr/executor.h"
#include "src/core/lib/slice/slice_internal.h"
#include "src/core/lib/surface/server.h"
#include "test/core/util/memory_counters.h"
#include "test/core/util/mock_endpoint.h"
bool squelch = true;
bool leak_check = true;
static void discard_write(grpc_slice slice) {}
static void* tag(int n) { return (void*)static_cast<uintptr_t>(n); }
static int detag(void* p) { return static_cast<int>((uintptr_t)p); }
static void dont_log(gpr_log_func_args* args) {}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
grpc_test_only_set_slice_hash_seed(0);
struct grpc_memory_counters counters;
if (squelch) gpr_set_log_function(dont_log);
if (leak_check) grpc_memory_counters_init();
grpc_init();
{
grpc_core::ExecCtx exec_ctx;
grpc_executor_set_threading(false);
grpc_resource_quota* resource_quota =
grpc_resource_quota_create("server_fuzzer");
grpc_endpoint* mock_endpoint =
grpc_mock_endpoint_create(discard_write, resource_quota);
grpc_resource_quota_unref_internal(resource_quota);
grpc_mock_endpoint_put_read(
mock_endpoint, grpc_slice_from_copied_buffer((const char*)data, size));
grpc_server* server = grpc_server_create(nullptr, nullptr);
grpc_completion_queue* cq = grpc_completion_queue_create_for_next(nullptr);
grpc_server_register_completion_queue(server, cq, nullptr);
// TODO(ctiller): add registered methods (one for POST, one for PUT)
// void *registered_method =
// grpc_server_register_method(server, "/reg", NULL, 0);
grpc_server_start(server);
grpc_transport* transport =
grpc_create_chttp2_transport(nullptr, mock_endpoint, false);
grpc_server_setup_transport(server, transport, nullptr, nullptr, 0);
grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
grpc_call* call1 = nullptr;
grpc_call_details call_details1;
grpc_metadata_array request_metadata1;
grpc_call_details_init(&call_details1);
grpc_metadata_array_init(&request_metadata1);
int requested_calls = 0;
GPR_ASSERT(GRPC_CALL_OK ==
grpc_server_request_call(server, &call1, &call_details1,
&request_metadata1, cq, cq, tag(1)));
requested_calls++;
grpc_event ev;
while (1) {
grpc_core::ExecCtx::Get()->Flush();
ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
nullptr);
switch (ev.type) {
case GRPC_QUEUE_TIMEOUT:
goto done;
case GRPC_QUEUE_SHUTDOWN:
break;
case GRPC_OP_COMPLETE:
switch (detag(ev.tag)) {
case 1:
requested_calls--;
// TODO(ctiller): keep reading that call!
break;
}
}
}
done:
if (call1 != nullptr) grpc_call_unref(call1);
grpc_call_details_destroy(&call_details1);
grpc_metadata_array_destroy(&request_metadata1);
grpc_server_shutdown_and_notify(server, cq, tag(0xdead));
grpc_server_cancel_all_calls(server);
grpc_millis deadline = grpc_core::ExecCtx::Get()->Now() + 5000;
for (int i = 0; i <= requested_calls; i++) {
// A single grpc_completion_queue_next might not be sufficient for getting
// the tag from shutdown, because we might potentially get blocked by
// an operation happening on the timer thread.
// For example, the deadline timer might expire, leading to the timer
// thread trying to cancel the RPC and thereby acquiring a few references
// to the call. This will prevent the shutdown to complete till the timer
// thread releases those references.
// As a solution, we are going to keep performing a cq_next for a
// liberal period of 5 seconds for the timer thread to complete its work.
do {
ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
nullptr);
grpc_core::ExecCtx::Get()->InvalidateNow();
} while (ev.type != GRPC_OP_COMPLETE &&
grpc_core::ExecCtx::Get()->Now() < deadline);
GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
}
grpc_completion_queue_shutdown(cq);
for (int i = 0; i <= requested_calls; i++) {
do {
ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
nullptr);
grpc_core::ExecCtx::Get()->InvalidateNow();
} while (ev.type != GRPC_QUEUE_SHUTDOWN &&
grpc_core::ExecCtx::Get()->Now() < deadline);
GPR_ASSERT(ev.type == GRPC_QUEUE_SHUTDOWN);
}
grpc_server_destroy(server);
grpc_completion_queue_destroy(cq);
}
grpc_shutdown();
if (leak_check) {
counters = grpc_memory_counters_snapshot();
grpc_memory_counters_destroy();
GPR_ASSERT(counters.total_size_relative == 0);
}
return 0;
}
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