| /* |
| * |
| * Copyright 2017 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 "src/core/lib/gprpp/fork.h" |
| |
| #include "src/core/lib/gprpp/thd.h" |
| #include "test/core/util/test_config.h" |
| |
| static void test_init() { |
| GPR_ASSERT(!grpc_core::Fork::Enabled()); |
| |
| // Default fork support (disabled) |
| grpc_core::Fork::GlobalInit(); |
| GPR_ASSERT(!grpc_core::Fork::Enabled()); |
| grpc_core::Fork::GlobalShutdown(); |
| |
| // Explicitly disabled fork support |
| grpc_core::Fork::Enable(false); |
| grpc_core::Fork::GlobalInit(); |
| GPR_ASSERT(!grpc_core::Fork::Enabled()); |
| grpc_core::Fork::GlobalShutdown(); |
| |
| // Explicitly enabled fork support |
| grpc_core::Fork::Enable(true); |
| grpc_core::Fork::GlobalInit(); |
| GPR_ASSERT(grpc_core::Fork::Enabled()); |
| grpc_core::Fork::GlobalShutdown(); |
| } |
| |
| // This spawns CONCURRENT_TEST_THREADS that last up to |
| // THREAD_DELAY_MS, and checks that the Fork::AwaitThreads() |
| // returns roughly after THREAD_DELAY_MS. The epsilon is high |
| // because tsan threads can take a while to spawn/join. |
| #define THREAD_DELAY_MS 6000 |
| #define THREAD_DELAY_EPSILON 1500 |
| #define CONCURRENT_TEST_THREADS 100 |
| |
| static void sleeping_thd(void* arg) { |
| int64_t sleep_ms = (int64_t)arg; |
| gpr_sleep_until(gpr_time_add(gpr_now(GPR_CLOCK_REALTIME), |
| gpr_time_from_millis(sleep_ms, GPR_TIMESPAN))); |
| } |
| |
| static void test_thd_count() { |
| // Test no active threads |
| grpc_core::Fork::Enable(true); |
| grpc_core::Fork::GlobalInit(); |
| grpc_core::Fork::AwaitThreads(); |
| grpc_core::Fork::GlobalShutdown(); |
| |
| grpc_core::Fork::Enable(true); |
| grpc_core::Fork::GlobalInit(); |
| grpc_core::Thread thds[CONCURRENT_TEST_THREADS]; |
| gpr_timespec est_end_time = |
| gpr_time_add(gpr_now(GPR_CLOCK_REALTIME), |
| gpr_time_from_millis(THREAD_DELAY_MS, GPR_TIMESPAN)); |
| gpr_timespec tolerance = |
| gpr_time_from_millis(THREAD_DELAY_EPSILON, GPR_TIMESPAN); |
| for (int i = 0; i < CONCURRENT_TEST_THREADS; i++) { |
| intptr_t sleep_time_ms = |
| (i * THREAD_DELAY_MS) / (CONCURRENT_TEST_THREADS - 1); |
| thds[i] = |
| grpc_core::Thread("grpc_fork_test", sleeping_thd, (void*)sleep_time_ms); |
| thds[i].Start(); |
| } |
| grpc_core::Fork::AwaitThreads(); |
| gpr_timespec end_time = gpr_now(GPR_CLOCK_REALTIME); |
| for (auto& thd : thds) { |
| thd.Join(); |
| } |
| GPR_ASSERT(gpr_time_similar(end_time, est_end_time, tolerance)); |
| grpc_core::Fork::GlobalShutdown(); |
| } |
| |
| static void exec_ctx_thread(void* arg) { |
| bool* exec_ctx_created = static_cast<bool*>(arg); |
| grpc_core::Fork::IncExecCtxCount(); |
| *exec_ctx_created = true; |
| } |
| |
| static void test_exec_count() { |
| grpc_core::Fork::Enable(true); |
| grpc_core::Fork::GlobalInit(); |
| |
| grpc_core::Fork::IncExecCtxCount(); |
| GPR_ASSERT(grpc_core::Fork::BlockExecCtx()); |
| grpc_core::Fork::DecExecCtxCount(); |
| grpc_core::Fork::AllowExecCtx(); |
| |
| grpc_core::Fork::IncExecCtxCount(); |
| grpc_core::Fork::IncExecCtxCount(); |
| GPR_ASSERT(!grpc_core::Fork::BlockExecCtx()); |
| grpc_core::Fork::DecExecCtxCount(); |
| grpc_core::Fork::DecExecCtxCount(); |
| |
| grpc_core::Fork::IncExecCtxCount(); |
| GPR_ASSERT(grpc_core::Fork::BlockExecCtx()); |
| grpc_core::Fork::DecExecCtxCount(); |
| grpc_core::Fork::AllowExecCtx(); |
| |
| // Test that block_exec_ctx() blocks grpc_core::Fork::IncExecCtxCount |
| bool exec_ctx_created = false; |
| grpc_core::Thread thd = |
| grpc_core::Thread("grpc_fork_test", exec_ctx_thread, &exec_ctx_created); |
| grpc_core::Fork::IncExecCtxCount(); |
| GPR_ASSERT(grpc_core::Fork::BlockExecCtx()); |
| grpc_core::Fork::DecExecCtxCount(); |
| thd.Start(); |
| gpr_sleep_until(gpr_time_add(gpr_now(GPR_CLOCK_REALTIME), |
| gpr_time_from_seconds(1, GPR_TIMESPAN))); |
| GPR_ASSERT(!exec_ctx_created); |
| grpc_core::Fork::AllowExecCtx(); |
| thd.Join(); // This ensure that the call got un-blocked |
| grpc_core::Fork::GlobalShutdown(); |
| } |
| |
| int main(int argc, char* argv[]) { |
| grpc::testing::TestEnvironment env(argc, argv); |
| test_init(); |
| test_thd_count(); |
| test_exec_count(); |
| |
| return 0; |
| } |