3 * Copyright 2015 gRPC authors.
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
9 * http://www.apache.org/licenses/LICENSE-2.0
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.
19 #include <grpc/support/port_platform.h>
21 #include "src/core/lib/iomgr/iomgr.h"
27 #include <grpc/support/alloc.h>
28 #include <grpc/support/log.h>
29 #include <grpc/support/string_util.h>
30 #include <grpc/support/sync.h>
32 #include "src/core/lib/gpr/env.h"
33 #include "src/core/lib/gpr/string.h"
34 #include "src/core/lib/gpr/useful.h"
35 #include "src/core/lib/gprpp/thd.h"
36 #include "src/core/lib/iomgr/buffer_list.h"
37 #include "src/core/lib/iomgr/exec_ctx.h"
38 #include "src/core/lib/iomgr/executor.h"
39 #include "src/core/lib/iomgr/internal_errqueue.h"
40 #include "src/core/lib/iomgr/iomgr_internal.h"
41 #include "src/core/lib/iomgr/timer.h"
42 #include "src/core/lib/iomgr/timer_manager.h"
46 static int g_shutdown;
47 static grpc_iomgr_object g_root_object;
49 void grpc_iomgr_init() {
50 grpc_core::ExecCtx exec_ctx;
51 grpc_determine_iomgr_platform();
55 grpc_core::Executor::InitAll();
56 grpc_timer_list_init();
57 g_root_object.next = g_root_object.prev = &g_root_object;
58 g_root_object.name = (char*)"root";
59 grpc_iomgr_platform_init();
60 grpc_core::grpc_errqueue_init();
63 void grpc_iomgr_start() { grpc_timer_manager_init(); }
65 static size_t count_objects(void) {
66 grpc_iomgr_object* obj;
68 for (obj = g_root_object.next; obj != &g_root_object; obj = obj->next) {
74 size_t grpc_iomgr_count_objects_for_testing(void) { return count_objects(); }
76 static void dump_objects(const char* kind) {
77 grpc_iomgr_object* obj;
78 for (obj = g_root_object.next; obj != &g_root_object; obj = obj->next) {
79 gpr_log(GPR_DEBUG, "%s OBJECT: %s %p", kind, obj->name, obj);
83 void grpc_iomgr_shutdown() {
84 gpr_timespec shutdown_deadline = gpr_time_add(
85 gpr_now(GPR_CLOCK_REALTIME), gpr_time_from_seconds(10, GPR_TIMESPAN));
86 gpr_timespec last_warning_time = gpr_now(GPR_CLOCK_REALTIME);
89 grpc_timer_manager_shutdown();
90 grpc_iomgr_platform_flush();
91 grpc_core::Executor::ShutdownAll();
95 while (g_root_object.next != &g_root_object) {
97 gpr_time_sub(gpr_now(GPR_CLOCK_REALTIME), last_warning_time),
98 gpr_time_from_seconds(1, GPR_TIMESPAN)) >= 0) {
99 if (g_root_object.next != &g_root_object) {
101 "Waiting for %" PRIuPTR " iomgr objects to be destroyed",
104 last_warning_time = gpr_now(GPR_CLOCK_REALTIME);
106 grpc_core::ExecCtx::Get()->SetNowIomgrShutdown();
107 if (grpc_timer_check(nullptr) == GRPC_TIMERS_FIRED) {
108 gpr_mu_unlock(&g_mu);
109 grpc_core::ExecCtx::Get()->Flush();
110 grpc_iomgr_platform_flush();
114 if (g_root_object.next != &g_root_object) {
115 if (grpc_iomgr_abort_on_leaks()) {
117 "Failed to free %" PRIuPTR
118 " iomgr objects before shutdown deadline: "
119 "memory leaks are likely",
121 dump_objects("LEAKED");
124 gpr_timespec short_deadline =
125 gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC),
126 gpr_time_from_millis(100, GPR_TIMESPAN));
127 if (gpr_cv_wait(&g_rcv, &g_mu, short_deadline)) {
128 if (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), shutdown_deadline) >
130 if (g_root_object.next != &g_root_object) {
132 "Failed to free %" PRIuPTR
133 " iomgr objects before shutdown deadline: "
134 "memory leaks are likely",
136 dump_objects("LEAKED");
143 gpr_mu_unlock(&g_mu);
144 grpc_timer_list_shutdown();
145 grpc_core::ExecCtx::Get()->Flush();
148 /* ensure all threads have left g_mu */
150 gpr_mu_unlock(&g_mu);
152 grpc_iomgr_platform_shutdown();
153 gpr_mu_destroy(&g_mu);
154 gpr_cv_destroy(&g_rcv);
157 void grpc_iomgr_shutdown_background_closure() {
158 grpc_iomgr_platform_shutdown_background_closure();
161 bool grpc_iomgr_is_any_background_poller_thread() {
162 return grpc_iomgr_platform_is_any_background_poller_thread();
165 bool grpc_iomgr_add_closure_to_background_poller(grpc_closure* closure,
167 return grpc_iomgr_platform_add_closure_to_background_poller(closure, error);
170 void grpc_iomgr_register_object(grpc_iomgr_object* obj, const char* name) {
171 obj->name = gpr_strdup(name);
173 obj->next = &g_root_object;
174 obj->prev = g_root_object.prev;
175 obj->next->prev = obj->prev->next = obj;
176 gpr_mu_unlock(&g_mu);
179 void grpc_iomgr_unregister_object(grpc_iomgr_object* obj) {
181 obj->next->prev = obj->prev;
182 obj->prev->next = obj->next;
183 gpr_cv_signal(&g_rcv);
184 gpr_mu_unlock(&g_mu);
188 bool grpc_iomgr_abort_on_leaks(void) {
189 char* env = gpr_getenv("GRPC_ABORT_ON_LEAKS");
190 bool should_we = gpr_is_true(env);