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 #include <grpc/support/port_platform.h>
20
21 #ifdef GPR_POSIX_LOG
22
23 #include <inttypes.h>
24 #include <pthread.h>
25 #include <stdarg.h>
26 #include <stdio.h>
27 #include <string.h>
28 #include <time.h>
29
30 #include <string>
31
32 #include "absl/strings/str_format.h"
33
34 #include <grpc/support/alloc.h>
35 #include <grpc/support/log.h>
36 #include <grpc/support/time.h>
37
38 #include "src/core/lib/gprpp/crash.h"
39 #include "src/core/lib/gprpp/examine_stack.h"
40
41 int gpr_should_log_stacktrace(gpr_log_severity severity);
42
sys_gettid(void)43 static intptr_t sys_gettid(void) { return (intptr_t)pthread_self(); }
44
gpr_log(const char * file,int line,gpr_log_severity severity,const char * format,...)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) {
49 return;
50 }
51 char buf[64];
52 char* allocated = nullptr;
53 char* message = nullptr;
54 int ret;
55 va_list args;
56 va_start(args, format);
57 ret = vsnprintf(buf, sizeof(buf), format, args);
58 va_end(args);
59 if (ret < 0) {
60 message = nullptr;
61 } else if ((size_t)ret <= sizeof(buf) - 1) {
62 message = buf;
63 } else {
64 message = allocated = (char*)gpr_malloc((size_t)ret + 1);
65 va_start(args, format);
66 vsnprintf(message, (size_t)(ret + 1), format, args);
67 va_end(args);
68 }
69 gpr_log_message(file, line, severity, message);
70 gpr_free(allocated);
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
81 timer = (time_t)now.tv_sec;
82 final_slash = strrchr(args->file, '/');
83 if (final_slash == nullptr)
84 display_file = args->file;
85 else
86 display_file = final_slash + 1;
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.%09d %7" PRIdPTR " %s:%d]", gpr_log_severity_string(args->severity),
97 time_buffer, (int)(now.tv_nsec), sys_gettid(), 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, "%-70s %s\n%s\n", prefix.c_str(), args->message,
105 stack_trace->c_str());
106 } else {
107 fprintf(stderr, "%-70s %s\n", prefix.c_str(), args->message);
108 }
109 }
110
111 #endif // defined(GPR_POSIX_LOG)
112