1 /*
2 *
3 * Copyright 2015 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 #ifndef _POSIX_SOURCE
20 #define _POSIX_SOURCE
21 #endif
22
23 #ifndef _GNU_SOURCE
24 #define _GNU_SOURCE
25 #endif
26
27 #include <grpc/support/port_platform.h>
28
29 #ifdef GPR_LINUX_LOG
30
31 #include <grpc/support/alloc.h>
32 #include <grpc/support/log.h>
33 #include <grpc/support/time.h>
34 #include <inttypes.h>
35 #include <stdarg.h>
36 #include <stdio.h>
37 #include <string.h>
38 #include <sys/syscall.h>
39 #include <time.h>
40 #include <unistd.h>
41
42 #include <string>
43
44 #include "absl/strings/str_format.h"
45 #include "src/core/lib/gprpp/examine_stack.h"
46
47 int gpr_should_log_stacktrace(gpr_log_severity severity);
48
sys_gettid(void)49 static long sys_gettid(void) { return syscall(__NR_gettid); }
50
gpr_log(const char * file,int line,gpr_log_severity severity,const char * format,...)51 void gpr_log(const char* file, int line, gpr_log_severity severity,
52 const char* format, ...) {
53 /* Avoid message construction if gpr_log_message won't log */
54 if (gpr_should_log(severity) == 0) {
55 return;
56 }
57 char* message = nullptr;
58 va_list args;
59 va_start(args, format);
60 if (vasprintf(&message, format, args) == -1) {
61 va_end(args);
62 return;
63 }
64 va_end(args);
65 gpr_log_message(file, line, severity, message);
66 /* message has been allocated by vasprintf above, and needs free */
67 free(message);
68 }
69
gpr_default_log(gpr_log_func_args * args)70 void gpr_default_log(gpr_log_func_args* args) {
71 const char* final_slash;
72 const char* display_file;
73 char time_buffer[64];
74 time_t timer;
75 gpr_timespec now = gpr_now(GPR_CLOCK_REALTIME);
76 struct tm tm;
77 static __thread long tid = 0;
78 if (tid == 0) tid = sys_gettid();
79
80 timer = static_cast<time_t>(now.tv_sec);
81 final_slash = strrchr(args->file, '/');
82 if (final_slash == nullptr) {
83 display_file = args->file;
84 } else {
85 display_file = final_slash + 1;
86 }
87
88 if (!localtime_r(&timer, &tm)) {
89 strcpy(time_buffer, "error:localtime");
90 } else if (0 ==
91 strftime(time_buffer, sizeof(time_buffer), "%m%d %H:%M:%S", &tm)) {
92 strcpy(time_buffer, "error:strftime");
93 }
94
95 std::string prefix = absl::StrFormat(
96 "%s%s.%09" PRId32 " %7ld %s:%d]", gpr_log_severity_string(args->severity),
97 time_buffer, now.tv_nsec, tid, display_file, args->line);
98
99 absl::optional<std::string> stack_trace =
100 gpr_should_log_stacktrace(args->severity)
101 ? grpc_core::GetCurrentStackTrace()
102 : absl::nullopt;
103 if (stack_trace) {
104 fprintf(stderr, "%-60s %s\n%s\n", prefix.c_str(), args->message,
105 stack_trace->c_str());
106 } else {
107 fprintf(stderr, "%-60s %s\n", prefix.c_str(), args->message);
108 }
109 }
110
111 #endif /* GPR_LINUX_LOG */
112