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_WINDOWS_LOG
22
23 #include <stdarg.h>
24 #include <stdio.h>
25
26 #include <grpc/support/alloc.h>
27 #include <grpc/support/log.h>
28 #include <grpc/support/log_windows.h>
29 #include <grpc/support/string_util.h>
30 #include <grpc/support/time.h>
31
32 #include "src/core/lib/gpr/string.h"
33 #include "src/core/lib/gprpp/crash.h"
34 #include "src/core/lib/gprpp/examine_stack.h"
35
36 int gpr_should_log_stacktrace(gpr_log_severity severity);
37
gpr_log(const char * file,int line,gpr_log_severity severity,const char * format,...)38 void gpr_log(const char* file, int line, gpr_log_severity severity,
39 const char* format, ...) {
40 // Avoid message construction if gpr_log_message won't log
41 if (gpr_should_log(severity) == 0) {
42 return;
43 }
44
45 char* message = NULL;
46 va_list args;
47 int ret;
48
49 // Determine the length.
50 va_start(args, format);
51 ret = _vscprintf(format, args);
52 va_end(args);
53 if (ret < 0) {
54 message = NULL;
55 } else {
56 // Allocate a new buffer, with space for the NUL terminator.
57 size_t strp_buflen = (size_t)ret + 1;
58 message = (char*)gpr_malloc(strp_buflen);
59
60 // Print to the buffer.
61 va_start(args, format);
62 ret = vsnprintf_s(message, strp_buflen, _TRUNCATE, format, args);
63 va_end(args);
64 if ((size_t)ret != strp_buflen - 1) {
65 // This should never happen.
66 gpr_free(message);
67 message = NULL;
68 }
69 }
70
71 gpr_log_message(file, line, severity, message);
72 gpr_free(message);
73 }
74
75 // Simple starter implementation
gpr_default_log(gpr_log_func_args * args)76 void gpr_default_log(gpr_log_func_args* args) {
77 const char* final_slash;
78 const char* display_file;
79 char time_buffer[64];
80 time_t timer;
81 gpr_timespec now = gpr_now(GPR_CLOCK_REALTIME);
82 struct tm tm;
83
84 timer = (time_t)now.tv_sec;
85 final_slash = strrchr(args->file, '\\');
86 if (final_slash == NULL)
87 display_file = args->file;
88 else
89 display_file = final_slash + 1;
90
91 if (localtime_s(&tm, &timer)) {
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 absl::optional<std::string> stack_trace =
99 gpr_should_log_stacktrace(args->severity)
100 ? grpc_core::GetCurrentStackTrace()
101 : absl::nullopt;
102 if (stack_trace) {
103 fprintf(stderr, "%s%s.%09u %5lu %s:%d] %s\n%s\n",
104 gpr_log_severity_string(args->severity), time_buffer,
105 (int)(now.tv_nsec), GetCurrentThreadId(), display_file, args->line,
106 args->message, stack_trace->c_str());
107 } else {
108 fprintf(stderr, "%s%s.%09u %5lu %s:%d] %s\n",
109 gpr_log_severity_string(args->severity), time_buffer,
110 (int)(now.tv_nsec), GetCurrentThreadId(), display_file, args->line,
111 args->message);
112 }
113 fflush(stderr);
114 }
115
116 #endif // GPR_WINDOWS_LOG
117