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.
27 #include <grpc/support/port_platform.h>
31 #include <grpc/support/alloc.h>
32 #include <grpc/support/log.h>
33 #include <grpc/support/string_util.h>
34 #include <grpc/support/time.h>
39 #include <sys/syscall.h>
43 static long sys_gettid(void) { return syscall(__NR_gettid); }
45 void gpr_log(const char* file, int line, gpr_log_severity severity,
46 const char* format, ...) {
47 /* Avoid message construction if gpr_log_message won't log */
48 if (gpr_should_log(severity) == 0) {
51 char* message = nullptr;
53 va_start(args, format);
54 if (vasprintf(&message, format, args) == -1) {
59 gpr_log_message(file, line, severity, message);
60 /* message has been allocated by vasprintf above, and needs free */
64 void gpr_default_log(gpr_log_func_args* args) {
65 const char* final_slash;
67 const char* display_file;
70 gpr_timespec now = gpr_now(GPR_CLOCK_REALTIME);
72 static __thread long tid = 0;
73 if (tid == 0) tid = sys_gettid();
75 timer = static_cast<time_t>(now.tv_sec);
76 final_slash = strrchr(args->file, '/');
77 if (final_slash == nullptr)
78 display_file = args->file;
80 display_file = final_slash + 1;
82 if (!localtime_r(&timer, &tm)) {
83 strcpy(time_buffer, "error:localtime");
85 strftime(time_buffer, sizeof(time_buffer), "%m%d %H:%M:%S", &tm)) {
86 strcpy(time_buffer, "error:strftime");
89 gpr_asprintf(&prefix, "%s%s.%09" PRId32 " %7ld %s:%d]",
90 gpr_log_severity_string(args->severity), time_buffer,
91 now.tv_nsec, tid, display_file, args->line);
93 fprintf(stderr, "%-60s %s\n", prefix, args->message);
97 #endif /* GPR_LINUX_LOG */