├── .gitignore ├── LICENSE ├── README.md └── src └── EspExceptionDecoder.java /.gitignore: -------------------------------------------------------------------------------- 1 | bin/ 2 | dist/ 3 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 2, June 1991 3 | 4 | Copyright (C) 1989, 1991 Free Software Foundation, Inc., 5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 6 | Everyone is permitted to copy and distribute verbatim copies 7 | of this license document, but changing it is not allowed. 8 | 9 | Preamble 10 | 11 | The licenses for most software are designed to take away your 12 | freedom to share and change it. By contrast, the GNU General Public 13 | License is intended to guarantee your freedom to share and change free 14 | software--to make sure the software is free for all its users. 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If this is what you want to do, use the GNU Lesser General 339 | Public License instead of this License. 340 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # ESP8266/ESP32 Exception Stack Trace Decoder CLI version 2 | 3 | Port of https://github.com/me-no-dev/EspExceptionDecoder to CLI. 4 | 5 | ## Usage 6 | | Description | Environment Variable | CLI argument | 7 | | -- | -- | -- | 8 | | ELF file| ELF_FILE| -e | 9 | | Xtensa GDB file | XTENSA_GDB | -g | 10 | | Exception File| EXP_FILE | -x (default homedirectory/exception.txt)| 11 | | Output file | DECODE_FILE | -o (default stdout) | 12 | 13 | Either environment variable or CLI argument can be used. 14 | 15 | CLI arguments take priority over environment variables. 16 | 17 | ## Credits and license 18 | 19 | - Copyright (c) 2015 Hristo Gochkov (ficeto at ficeto dot com) 20 | - Modified by Rushikesh Patel 2018 (https://github.com/luffykesh) 21 | - Licensed under GPL v2 ([text](LICENSE)) 22 | -------------------------------------------------------------------------------- /src/EspExceptionDecoder.java: -------------------------------------------------------------------------------- 1 | /* 2 | Copyright (c) 2015 Hristo Gochkov (ficeto at ficeto dot com) 3 | Modified by Rushikesh Patel 2018 CLI version (https://github.com/luffykesh) 4 | 5 | This program is free software; you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation; either version 2 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program; if not, write to the Free Software Foundation, 17 | Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18 | */ 19 | import java.nio.file.Files; 20 | import java.nio.file.Paths; 21 | import java.io.File; 22 | import java.io.IOException; 23 | import java.io.InputStreamReader; 24 | import java.util.*; 25 | import java.util.regex.*; 26 | 27 | public class EspExceptionDecoder{ 28 | File tool; 29 | File elf; 30 | String exceptionFile; 31 | String exceptionText; 32 | String outputText; 33 | String outputFile; 34 | 35 | private static String[] exceptions = { 36 | "Illegal instruction", 37 | "SYSCALL instruction", 38 | "InstructionFetchError: Processor internal physical address or data error during instruction fetch", 39 | "LoadStoreError: Processor internal physical address or data error during load or store", 40 | "Level1Interrupt: Level-1 interrupt as indicated by set level-1 bits in the INTERRUPT register", 41 | "Alloca: MOVSP instruction, if caller's registers are not in the register file", 42 | "IntegerDivideByZero: QUOS, QUOU, REMS, or REMU divisor operand is zero", 43 | "reserved", 44 | "Privileged: Attempt to execute a privileged operation when CRING ? 0", 45 | "LoadStoreAlignmentCause: Load or store to an unaligned address", 46 | "reserved", 47 | "reserved", 48 | "InstrPIFDataError: PIF data error during instruction fetch", 49 | "LoadStorePIFDataError: Synchronous PIF data error during LoadStore access", 50 | "InstrPIFAddrError: PIF address error during instruction fetch", 51 | "LoadStorePIFAddrError: Synchronous PIF address error during LoadStore access", 52 | "InstTLBMiss: Error during Instruction TLB refill", 53 | "InstTLBMultiHit: Multiple instruction TLB entries matched", 54 | "InstFetchPrivilege: An instruction fetch referenced a virtual address at a ring level less than CRING", 55 | "reserved", 56 | "InstFetchProhibited: An instruction fetch referenced a page mapped with an attribute that does not permit instruction fetch", 57 | "reserved", 58 | "reserved", 59 | "reserved", 60 | "LoadStoreTLBMiss: Error during TLB refill for a load or store", 61 | "LoadStoreTLBMultiHit: Multiple TLB entries matched for a load or store", 62 | "LoadStorePrivilege: A load or store referenced a virtual address at a ring level less than CRING", 63 | "reserved", 64 | "LoadProhibited: A load referenced a page mapped with an attribute that does not permit loads", 65 | "StoreProhibited: A store referenced a page mapped with an attribute that does not permit stores" 66 | }; 67 | 68 | public static void main(String[] args) { 69 | EspExceptionDecoder decoder = new EspExceptionDecoder(); 70 | decoder.decode(args); 71 | } 72 | private void decode(String[] args) 73 | { 74 | parseCliArgs(args); 75 | init(); 76 | runParser(); 77 | } 78 | public static Process execRedirected(String[] command) throws IOException { 79 | ProcessBuilder pb; 80 | 81 | // No problems on linux and mac 82 | if (!System.getProperty("os.name").startsWith("Windows")) { 83 | pb = new ProcessBuilder(command); 84 | } else { 85 | // Brutal hack to workaround windows command line parsing. 86 | // http://stackoverflow.com/questions/5969724/java-runtime-exec-fails-to-escape-characters-properly 87 | // http://msdn.microsoft.com/en-us/library/a1y7w461.aspx 88 | // http://bugs.sun.com/view_bug.do?bug_id=6468220 89 | // http://bugs.sun.com/view_bug.do?bug_id=6518827 90 | String[] cmdLine = new String[command.length]; 91 | for (int i = 0; i < command.length; i++) 92 | cmdLine[i] = command[i].replace("\"", "\\\""); 93 | pb = new ProcessBuilder(cmdLine); 94 | Map env = pb.environment(); 95 | env.put("CYGWIN", "nodosfilewarning"); 96 | } 97 | pb.redirectErrorStream(true); 98 | 99 | return pb.start(); 100 | } 101 | 102 | private int listenOnProcess(String[] arguments){ 103 | try { 104 | final Process p = execRedirected(arguments); 105 | Thread thread = new Thread() { 106 | public void run() { 107 | try { 108 | InputStreamReader reader = new InputStreamReader(p.getInputStream()); 109 | int c; 110 | String line = ""; 111 | while ((c = reader.read()) != -1){ 112 | if((char)c == '\r') 113 | continue; 114 | if((char)c == '\n'){ 115 | printLine(line); 116 | line = ""; 117 | } else { 118 | line += (char)c; 119 | } 120 | } 121 | printLine(line); 122 | reader.close(); 123 | 124 | reader = new InputStreamReader(p.getErrorStream()); 125 | while ((c = reader.read()) != -1) 126 | System.err.print((char) c); 127 | reader.close(); 128 | } catch (Exception e){} 129 | } 130 | }; 131 | thread.start(); 132 | int res = p.waitFor(); 133 | thread.join(); 134 | return res; 135 | } catch (Exception e){} 136 | return -1; 137 | } 138 | 139 | private void sysExec(final String[] arguments){ 140 | Thread thread = new Thread() { 141 | public void run() { 142 | try { 143 | if(listenOnProcess(arguments) != 0){ 144 | System.out.println("Decode Failed"); 145 | } else { 146 | if(outputFile==null) 147 | { 148 | System.out.println("Decode Success"); 149 | System.out.println(outputText); 150 | } 151 | else 152 | { 153 | try{ 154 | Files.write(Paths.get(outputFile),outputText.getBytes()); 155 | } 156 | catch(Exception e) { 157 | System.err.println("Error writing to: "+ outputFile); 158 | System.err.println(e.getMessage()); 159 | } 160 | } 161 | } 162 | } catch (Exception e){ 163 | System.err.println("Decode Exception"); 164 | System.err.println(e.getMessage()); 165 | } 166 | } 167 | }; 168 | thread.start(); 169 | } 170 | private void parseCliArgs(String[] args) 171 | { 172 | for(int i = 0 ;i 0){ 259 | int lastfs = file.lastIndexOf('/'); 260 | int lastbs = file.lastIndexOf('\\'); 261 | int slash = (lastfs > lastbs)?lastfs:lastbs; 262 | if(slash != -1){ 263 | String filename = file.substring(slash+1); 264 | file = file.substring(0,slash+1) + " " + filename + " "; 265 | } 266 | } 267 | html = address + ": " + 268 | method + " at " + 269 | file + " line " + line; 270 | } catch (Exception e) { 271 | // Something weird in the GDB output format, report what we can 272 | html = address + ": " + line; 273 | } 274 | 275 | return html; 276 | } 277 | 278 | private void printLine(String line){ 279 | String s = prettyPrintGDBLine(line); 280 | if (s != null) 281 | outputText += s +"\n"; 282 | } 283 | 284 | private void parseException(){ 285 | String content = exceptionText; 286 | Pattern p = Pattern.compile("Exception \\(([0-9]*)\\):"); 287 | Matcher m = p.matcher(content); 288 | if(m.find()){ 289 | int exception = Integer.parseInt(m.group(1)); 290 | if(exception < 0 || exception > 29){ 291 | return; 292 | } 293 | outputText += "Exception "+exception+": "+exceptions[exception]+"\n"; 294 | } 295 | } 296 | 297 | // Strip out just the STACK lines or BACKTRACE line, and generate the reference log 298 | private void parseStackOrBacktrace(String regexp, boolean multiLine, String stripAfter) { 299 | String content = exceptionText; 300 | 301 | Pattern strip; 302 | if (multiLine) strip = Pattern.compile(regexp, Pattern.DOTALL); 303 | else strip = Pattern.compile(regexp); 304 | Matcher stripMatch = strip.matcher(content); 305 | if (!stripMatch.find()) { 306 | return; // Didn't find it in the text box. 307 | } 308 | 309 | // Strip out just the interesting bits to make RexExp sane 310 | content = content.substring(stripMatch.start(), stripMatch.end()); 311 | 312 | if (stripAfter != null) { 313 | Pattern after = Pattern.compile(stripAfter); 314 | Matcher afterMatch = after.matcher(content); 315 | if (afterMatch.find()) { 316 | content = content.substring(0, afterMatch.start()); 317 | } 318 | } 319 | 320 | // Anything looking like an instruction address, dump! 321 | Pattern p = Pattern.compile("40[0-2](\\d|[a-f]|[A-F]){5}\\b"); 322 | int count = 0; 323 | Matcher m = p.matcher(content); 324 | while(m.find()) { 325 | count ++; 326 | } 327 | if(count == 0){ 328 | return; 329 | } 330 | String command[] = new String[7 + count*2]; 331 | int i = 0; 332 | command[i++] = tool.getAbsolutePath(); 333 | command[i++] = "--batch"; 334 | command[i++] = elf.getAbsolutePath(); 335 | command[i++] = "-ex"; 336 | command[i++] = "set listsize 1"; 337 | m = p.matcher(content); 338 | while(m.find()) { 339 | command[i++] = "-ex"; 340 | command[i++] = "l *0x"+content.substring(m.start(), m.end()); 341 | } 342 | command[i++] = "-ex"; 343 | command[i++] = "q"; 344 | outputText += "\nDecoding stack results\n"; 345 | sysExec(command); 346 | } 347 | 348 | // Heavyweight call GDB, run list on address, and return result if it succeeded 349 | private String decodeFunctionAtAddress( String addr ) { 350 | String command[] = new String[9]; 351 | command[0] = tool.getAbsolutePath(); 352 | command[1] = "--batch"; 353 | command[2] = elf.getAbsolutePath(); 354 | command[3] = "-ex"; 355 | command[4] = "set listsize 1"; 356 | command[5] = "-ex"; 357 | command[6] = "l *0x" + addr; 358 | command[7] = "-ex"; 359 | command[8] = "q"; 360 | 361 | try { 362 | final Process proc = execRedirected(command); 363 | InputStreamReader reader = new InputStreamReader(proc.getInputStream()); 364 | int c; 365 | String line = ""; 366 | while ((c = reader.read()) != -1){ 367 | if((char)c == '\r') 368 | continue; 369 | if((char)c == '\n' && line != ""){ 370 | reader.close(); 371 | return prettyPrintGDBLine(line); 372 | } else { 373 | line += (char)c; 374 | } 375 | } 376 | reader.close(); 377 | } catch (Exception er) { } 378 | // Something went wrong 379 | return null; 380 | } 381 | 382 | // Scan and report the last failed memory allocation attempt, if present on the ESP8266 383 | private void parseAlloc() { 384 | String content = exceptionText; 385 | Pattern p = Pattern.compile("last failed alloc call: 40[0-2](\\d|[a-f]|[A-F]){5}\\((\\d)+\\)"); 386 | Matcher m = p.matcher(content); 387 | if (m.find()) { 388 | String fs = content.substring(m.start(), m.end()); 389 | Pattern p2 = Pattern.compile("40[0-2](\\d|[a-f]|[A-F]){5}\\b"); 390 | Matcher m2 = p2.matcher(fs); 391 | if (m2.find()) { 392 | String addr = fs.substring(m2.start(), m2.end()); 393 | Pattern p3 = Pattern.compile("\\((\\d)+\\)"); 394 | Matcher m3 = p3.matcher(fs); 395 | if (m3.find()) { 396 | String size = fs.substring(m3.start()+1, m3.end()-1); 397 | String line = decodeFunctionAtAddress(addr); 398 | if (line != null) { 399 | outputText += "Memory allocation of " + size + " bytes failed at " + line + "\n"; 400 | } 401 | } 402 | } 403 | } 404 | } 405 | 406 | // Filter out a register output given a regex (ESP8266/ESP32 differ in format) 407 | private void parseRegister(String regName, String prettyName) { 408 | String content = exceptionText; 409 | Pattern p = Pattern.compile(regName + "(\\d|[a-f]|[A-F]){8}\\b"); 410 | Matcher m = p.matcher(content); 411 | if (m.find()) { 412 | String fs = content.substring(m.start(), m.end()); 413 | Pattern p2 = Pattern.compile("(\\d|[a-f]|[A-F]){8}\\b"); 414 | Matcher m2 = p2.matcher(fs); 415 | if (m2.find()) { 416 | String addr = fs.substring(m2.start(), m2.end()); 417 | String line = decodeFunctionAtAddress(addr); 418 | if (line != null) { 419 | outputText += prettyName + ": " + line + "\n"; 420 | } else { 421 | outputText += prettyName + ": 0x" + addr + "\n"; 422 | } 423 | } 424 | } 425 | } 426 | 427 | //entry point 428 | private void runParser(){ 429 | outputText = ""; 430 | // Main error cause 431 | parseException(); 432 | // ESP8266 register format 433 | parseRegister("epc1=0x", "PC"); 434 | parseRegister("excvaddr=0x", "EXCVADDR"); 435 | // ESP32 register format 436 | parseRegister("PC\\s*:\\s*(0x)?", "PC"); 437 | parseRegister("EXCVADDR\\s*:\\s*(0x)?", "EXCVADDR"); 438 | // Last memory allocation failure 439 | parseAlloc(); 440 | // The stack on ESP8266, multiline 441 | parseStackOrBacktrace(">>>stack>>>(.)*", true, "<<