Add optional, automatic OOM logger parsing

earlephilhower · earlephilhower · commit 8ba299b4eefe · 2018-01-22T19:13:15.000-08:00
An updated ESP8266 panic function can print out the calling function/line
and size requested for the last malloc/realloc/calloc/new allocation that
failed, without the overhead of full the OOM stack.

Add parsing for this line, when present, and output the function, file,
line, and amount of memory requested to the display.  When not present,
do nothing different.
diff --git a/src/EspExceptionDecoder.java b/src/EspExceptionDecoder.java
@@ -382,9 +382,54 @@ private void parseText(){
     sysExec(command);
   }
 
+  private void parseAlloc() {
+    String content = inputArea.getText();
+    Pattern p = Pattern.compile("last failed alloc call: 40[0-2](\\d|[-A-F]){5}\\((\\d)+\\)");
+    Matcher m = p.matcher(content);
+    if (m.find()) {
+      String fs = content.substring(m.start(), m.end());
+      Pattern p2 = Pattern.compile("40[0-2](\\d|[A-F]){5}\\b");
+      Matcher m2 = p2.matcher(fs);
+      if (m2.find()) {
+          String addr = fs.substring(m2.start(), m2.end());
+          Pattern p3 = Pattern.compile("\\((\\d)+\\)");
+          Matcher m3 = p3.matcher(fs);
+          if (m3.find()) {
+            String size = fs.substring(m3.start()+1, m3.end()-1);
+
+            String command[] = new String[5];
+            command[0] = tool.getAbsolutePath();
+            command[1] = "-aipfC";
+            command[2] = "-e";
+            command[3] = elf.getAbsolutePath();
+            command[4] = addr;
+      
+            try {
+              final Process proc = ProcessUtils.exec(command);
+              InputStreamReader reader = new InputStreamReader(proc.getInputStream());
+              int c;
+              String line = "";
+              while ((c = reader.read()) != -1){
+                if((char)c == '\r')
+                  continue;
+                if((char)c == '\n' && line != ""){
+                  outputText += "Memory allocation of " + size + " bytes failed at " + line + "\n";
+                  break;
+                } else {
+                 line += (char)c;
+                }
+              }
+              reader.close();
+            } catch (Exception er) { }
+          }
+      }
+    }
+  }
+
   private void runParser(){
     outputText = "<html><pre>\n";
     parseException();
+    parseAlloc();
     parseText();
   }
 
