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 <inttypes.h>
32 #include <stdarg.h>
33 #include <stdio.h>
34 #include <string.h>
35 #include <sys/syscall.h>
36 #include <time.h>
37 #include <unistd.h>
38
39 #include <string>
40
41 #include "absl/strings/str_format.h"
42
43 #include <grpc/support/alloc.h>
44 #include <grpc/support/log.h>
45 #include <grpc/support/time.h>
46
47 #include "src/core/lib/gprpp/crash.h"
48 #include "src/core/lib/gprpp/examine_stack.h"
49
50 int gpr_should_log_stacktrace(gpr_log_severity severity);
51
sys_gettid(void)52 static long sys_gettid(void) { return syscall(__NR_gettid); }
53
gpr_log(const char * file,int line,gpr_log_severity severity,const char * format,...)54 void gpr_log(const char* file, int line, gpr_log_severity severity,
55 const char* format, ...) {
56 // Avoid message construction if gpr_log_message won't log
57 if (gpr_should_log(severity) == 0) {
58 return;
59 }
60 char* message = nullptr;
61 va_list args;
62 va_start(args, format);
63 if (vasprintf(&message, format, args) == -1) {
64 va_end(args);
65 return;
66 }
67 va_end(args);
68 gpr_log_message(file, line, severity, message);
69 // message has been allocated by vasprintf above, and needs free
70 free(message);
71 }
72
gpr_platform_log(gpr_log_func_args * args)73 void gpr_platform_log(gpr_log_func_args* args) {
74 const char* final_slash;
75 const char* display_file;
76 char time_buffer[64];
77 time_t timer;
78 gpr_timespec now = gpr_now(GPR_CLOCK_REALTIME);
79 struct tm tm;
80 static thread_local long tid(0);
81 if (tid == 0) tid = sys_gettid();
82
83 timer = static_cast<time_t>(now.tv_sec);
84 final_slash = strrchr(args->file, '/');
85 if (final_slash == nullptr) {
86 display_file = args->file;
87 } else {
88 display_file = final_slash + 1;
89 }
90
91 if (!localtime_r(&timer, &tm)) {
92 strcpy(time_buffer, "error:localtime");
93 } else if (0 ==
94 strftime(time_buffer, sizeof(time_buffer), "%m%d %H:%M:%S", &tm)) {
95 strcpy(time_buffer, "error:strftime");
96 }
97
98 std::string prefix = absl::StrFormat(
99 "%s%s.%09" PRId32 " %7ld %s:%d]", gpr_log_severity_string(args->severity),
100 time_buffer, now.tv_nsec, tid, display_file, args->line);
101
102 absl::optional<std::string> stack_trace =
103 gpr_should_log_stacktrace(args->severity)
104 ? grpc_core::GetCurrentStackTrace()
105 : absl::nullopt;
106 if (stack_trace) {
107 fprintf(stderr, "%-70s %s\n%s\n", prefix.c_str(), args->message,
108 stack_trace->c_str());
109 } else {
110 fprintf(stderr, "%-70s %s\n", prefix.c_str(), args->message);
111 }
112 }
113
114 #endif // GPR_LINUX_LOG
115