Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2005-2016 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef _LIBS_LOG_EVENT_LIST_H |
| 18 | #define _LIBS_LOG_EVENT_LIST_H |
| 19 | |
Mark Salyzyn | 084d392 | 2017-04-13 08:19:52 -0700 | [diff] [blame] | 20 | #include <errno.h> |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 21 | #include <stdint.h> |
| 22 | |
| 23 | #if (defined(__cplusplus) && defined(_USING_LIBCXX)) |
| 24 | extern "C++" { |
| 25 | #include <string> |
| 26 | } |
| 27 | #endif |
| 28 | |
| 29 | #include <log/log.h> |
| 30 | |
| 31 | #ifdef __cplusplus |
| 32 | extern "C" { |
| 33 | #endif |
| 34 | |
| 35 | #ifndef __ANDROID_USE_LIBLOG_EVENT_INTERFACE |
| 36 | #ifndef __ANDROID_API__ |
| 37 | #define __ANDROID_USE_LIBLOG_EVENT_INTERFACE 1 |
| 38 | #elif __ANDROID_API__ > 23 /* > Marshmallow */ |
| 39 | #define __ANDROID_USE_LIBLOG_EVENT_INTERFACE 1 |
| 40 | #else |
| 41 | #define __ANDROID_USE_LIBLOG_EVENT_INTERFACE 0 |
| 42 | #endif |
| 43 | #endif |
| 44 | |
| 45 | #if __ANDROID_USE_LIBLOG_EVENT_INTERFACE |
| 46 | |
| 47 | /* For manipulating lists of events. */ |
| 48 | |
| 49 | #define ANDROID_MAX_LIST_NEST_DEPTH 8 |
| 50 | |
| 51 | /* |
| 52 | * The opaque context used to manipulate lists of events. |
| 53 | */ |
| 54 | #ifndef __android_log_context_defined |
| 55 | #define __android_log_context_defined |
| 56 | typedef struct android_log_context_internal* android_log_context; |
| 57 | #endif |
| 58 | |
| 59 | /* |
| 60 | * Elements returned when reading a list of events. |
| 61 | */ |
| 62 | #ifndef __android_log_list_element_defined |
| 63 | #define __android_log_list_element_defined |
| 64 | typedef struct { |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 65 | AndroidEventLogType type; |
| 66 | uint16_t complete; |
| 67 | uint16_t len; |
| 68 | union { |
| 69 | int32_t int32; |
| 70 | int64_t int64; |
| 71 | char* string; |
| 72 | float float32; |
| 73 | } data; |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 74 | } android_log_list_element; |
| 75 | #endif |
| 76 | |
| 77 | /* |
| 78 | * Creates a context associated with an event tag to write elements to |
| 79 | * the list of events. |
| 80 | */ |
| 81 | android_log_context create_android_logger(uint32_t tag); |
| 82 | |
| 83 | /* All lists must be braced by a begin and end call */ |
| 84 | /* |
| 85 | * NB: If the first level braces are missing when specifying multiple |
| 86 | * elements, we will manufacturer a list to embrace it for your API |
| 87 | * convenience. For a single element, it will remain solitary. |
| 88 | */ |
| 89 | int android_log_write_list_begin(android_log_context ctx); |
| 90 | int android_log_write_list_end(android_log_context ctx); |
| 91 | |
| 92 | int android_log_write_int32(android_log_context ctx, int32_t value); |
| 93 | int android_log_write_int64(android_log_context ctx, int64_t value); |
| 94 | int android_log_write_string8(android_log_context ctx, const char* value); |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 95 | int android_log_write_string8_len(android_log_context ctx, const char* value, |
| 96 | size_t maxlen); |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 97 | int android_log_write_float32(android_log_context ctx, float value); |
| 98 | |
| 99 | /* Submit the composed list context to the specified logger id */ |
| 100 | /* NB: LOG_ID_EVENTS and LOG_ID_SECURITY only valid binary buffers */ |
| 101 | int android_log_write_list(android_log_context ctx, log_id_t id); |
| 102 | |
| 103 | /* |
| 104 | * Creates a context from a raw buffer representing a list of events to be read. |
| 105 | */ |
| 106 | android_log_context create_android_log_parser(const char* msg, size_t len); |
| 107 | |
| 108 | android_log_list_element android_log_read_next(android_log_context ctx); |
| 109 | android_log_list_element android_log_peek_next(android_log_context ctx); |
| 110 | |
| 111 | /* Finished with reader or writer context */ |
| 112 | int android_log_destroy(android_log_context* ctx); |
| 113 | |
| 114 | #ifdef __cplusplus |
| 115 | #ifndef __class_android_log_event_list_defined |
| 116 | #define __class_android_log_event_list_defined |
| 117 | /* android_log_list C++ helpers */ |
| 118 | extern "C++" { |
| 119 | class android_log_event_list { |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 120 | friend class __android_log_event_list; |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 121 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 122 | private: |
| 123 | android_log_context ctx; |
| 124 | int ret; |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 125 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 126 | android_log_event_list(const android_log_event_list&) = delete; |
| 127 | void operator=(const android_log_event_list&) = delete; |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 128 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 129 | public: |
| 130 | explicit android_log_event_list(int tag) : ret(0) { |
| 131 | ctx = create_android_logger(static_cast<uint32_t>(tag)); |
| 132 | } |
| 133 | explicit android_log_event_list(log_msg& log_msg) : ret(0) { |
| 134 | ctx = create_android_log_parser(log_msg.msg() + sizeof(uint32_t), |
| 135 | log_msg.entry.len - sizeof(uint32_t)); |
| 136 | } |
| 137 | ~android_log_event_list() { |
| 138 | android_log_destroy(&ctx); |
| 139 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 140 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 141 | int close() { |
| 142 | int retval = android_log_destroy(&ctx); |
| 143 | if (retval < 0) ret = retval; |
| 144 | return retval; |
| 145 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 146 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 147 | /* To allow above C calls to use this class as parameter */ |
| 148 | operator android_log_context() const { |
| 149 | return ctx; |
| 150 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 151 | |
Mark Salyzyn | 084d392 | 2017-04-13 08:19:52 -0700 | [diff] [blame] | 152 | /* return errors or transmit status */ |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 153 | int status() const { |
| 154 | return ret; |
| 155 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 156 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 157 | int begin() { |
| 158 | int retval = android_log_write_list_begin(ctx); |
| 159 | if (retval < 0) ret = retval; |
| 160 | return ret; |
| 161 | } |
| 162 | int end() { |
| 163 | int retval = android_log_write_list_end(ctx); |
| 164 | if (retval < 0) ret = retval; |
| 165 | return ret; |
| 166 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 167 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 168 | android_log_event_list& operator<<(int32_t value) { |
| 169 | int retval = android_log_write_int32(ctx, value); |
| 170 | if (retval < 0) ret = retval; |
| 171 | return *this; |
| 172 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 173 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 174 | android_log_event_list& operator<<(uint32_t value) { |
| 175 | int retval = android_log_write_int32(ctx, static_cast<int32_t>(value)); |
| 176 | if (retval < 0) ret = retval; |
| 177 | return *this; |
| 178 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 179 | |
Mark Salyzyn | 7ecb9e9 | 2017-06-05 07:47:29 -0700 | [diff] [blame^] | 180 | android_log_event_list& operator<<(bool value) { |
| 181 | int retval = android_log_write_int32(ctx, value ? 1 : 0); |
| 182 | if (retval < 0) ret = retval; |
| 183 | return *this; |
| 184 | } |
| 185 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 186 | android_log_event_list& operator<<(int64_t value) { |
| 187 | int retval = android_log_write_int64(ctx, value); |
| 188 | if (retval < 0) ret = retval; |
| 189 | return *this; |
| 190 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 191 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 192 | android_log_event_list& operator<<(uint64_t value) { |
| 193 | int retval = android_log_write_int64(ctx, static_cast<int64_t>(value)); |
| 194 | if (retval < 0) ret = retval; |
| 195 | return *this; |
| 196 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 197 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 198 | android_log_event_list& operator<<(const char* value) { |
| 199 | int retval = android_log_write_string8(ctx, value); |
| 200 | if (retval < 0) ret = retval; |
| 201 | return *this; |
| 202 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 203 | |
| 204 | #if defined(_USING_LIBCXX) |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 205 | android_log_event_list& operator<<(const std::string& value) { |
| 206 | int retval = |
| 207 | android_log_write_string8_len(ctx, value.data(), value.length()); |
| 208 | if (retval < 0) ret = retval; |
| 209 | return *this; |
| 210 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 211 | #endif |
| 212 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 213 | android_log_event_list& operator<<(float value) { |
| 214 | int retval = android_log_write_float32(ctx, value); |
| 215 | if (retval < 0) ret = retval; |
| 216 | return *this; |
| 217 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 218 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 219 | int write(log_id_t id = LOG_ID_EVENTS) { |
Mark Salyzyn | 084d392 | 2017-04-13 08:19:52 -0700 | [diff] [blame] | 220 | /* facilitate -EBUSY retry */ |
| 221 | if ((ret == -EBUSY) || (ret > 0)) ret = 0; |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 222 | int retval = android_log_write_list(ctx, id); |
Mark Salyzyn | 084d392 | 2017-04-13 08:19:52 -0700 | [diff] [blame] | 223 | /* existing errors trump transmission errors */ |
| 224 | if (!ret) ret = retval; |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 225 | return ret; |
| 226 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 227 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 228 | int operator<<(log_id_t id) { |
Mark Salyzyn | 084d392 | 2017-04-13 08:19:52 -0700 | [diff] [blame] | 229 | write(id); |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 230 | android_log_destroy(&ctx); |
| 231 | return ret; |
| 232 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 233 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 234 | /* |
| 235 | * Append<Type> methods removes any integer promotion |
| 236 | * confusion, and adds access to string with length. |
| 237 | * Append methods are also added for all types for |
| 238 | * convenience. |
| 239 | */ |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 240 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 241 | bool AppendInt(int32_t value) { |
| 242 | int retval = android_log_write_int32(ctx, value); |
| 243 | if (retval < 0) ret = retval; |
| 244 | return ret >= 0; |
| 245 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 246 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 247 | bool AppendLong(int64_t value) { |
| 248 | int retval = android_log_write_int64(ctx, value); |
| 249 | if (retval < 0) ret = retval; |
| 250 | return ret >= 0; |
| 251 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 252 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 253 | bool AppendString(const char* value) { |
| 254 | int retval = android_log_write_string8(ctx, value); |
| 255 | if (retval < 0) ret = retval; |
| 256 | return ret >= 0; |
| 257 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 258 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 259 | bool AppendString(const char* value, size_t len) { |
| 260 | int retval = android_log_write_string8_len(ctx, value, len); |
| 261 | if (retval < 0) ret = retval; |
| 262 | return ret >= 0; |
| 263 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 264 | |
| 265 | #if defined(_USING_LIBCXX) |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 266 | bool AppendString(const std::string& value) { |
| 267 | int retval = |
| 268 | android_log_write_string8_len(ctx, value.data(), value.length()); |
| 269 | if (retval < 0) ret = retval; |
| 270 | return ret; |
| 271 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 272 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 273 | bool Append(const std::string& value) { |
| 274 | int retval = |
| 275 | android_log_write_string8_len(ctx, value.data(), value.length()); |
| 276 | if (retval < 0) ret = retval; |
| 277 | return ret; |
| 278 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 279 | #endif |
| 280 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 281 | bool AppendFloat(float value) { |
| 282 | int retval = android_log_write_float32(ctx, value); |
| 283 | if (retval < 0) ret = retval; |
| 284 | return ret >= 0; |
| 285 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 286 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 287 | template <typename Tvalue> |
| 288 | bool Append(Tvalue value) { |
| 289 | *this << value; |
| 290 | return ret >= 0; |
| 291 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 292 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 293 | bool Append(const char* value, size_t len) { |
| 294 | int retval = android_log_write_string8_len(ctx, value, len); |
| 295 | if (retval < 0) ret = retval; |
| 296 | return ret >= 0; |
| 297 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 298 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 299 | android_log_list_element read() { |
| 300 | return android_log_read_next(ctx); |
| 301 | } |
| 302 | android_log_list_element peek() { |
| 303 | return android_log_peek_next(ctx); |
| 304 | } |
Vijay Venkatraman | e15a3b1 | 2017-01-25 18:52:17 +0000 | [diff] [blame] | 305 | }; |
| 306 | } |
| 307 | #endif |
| 308 | #endif |
| 309 | |
| 310 | #endif /* __ANDROID_USE_LIBLOG_EVENT_INTERFACE */ |
| 311 | |
| 312 | #ifdef __cplusplus |
| 313 | } |
| 314 | #endif |
| 315 | |
| 316 | #endif /* _LIBS_LOG_EVENT_LIST_H */ |