stack_core ProcessLine now returns a boolean.

The value corresponds to whether or not the line has matched one of the
detected formats (registers, header, backtrace, etc.) and can be used to
identify what logcat lines don't correspond to one of these formats.

Change-Id: Ibd7bc5a211dcfe86ea2f92d7e7941091afff4fc4

scripts/stack_core.py

@@ -138,6 +138,7 @@ class TraceConverter:
     self.PrintOutput(self.trace_lines, self.value_lines)
 
   def ProcessLine(self, line):
+    ret = False
     process_header = self.process_info_line.search(line)
     signal_header = self.signal_line.search(line)
     abort_message_header = self.abort_message_line.search(line)
@@ -149,6 +150,7 @@ class TraceConverter:
     dalvik_native_thread_header = self.dalvik_native_thread_line.search(line)
     if process_header or signal_header or abort_message_header or thread_header or abi_header or \
         register_header or dalvik_jni_thread_header or dalvik_native_thread_header or revision_header:
+      ret = True
       if self.trace_lines or self.value_lines:
         self.PrintOutput(self.trace_lines, self.value_lines)
         self.PrintDivider()
@@ -175,8 +177,9 @@ class TraceConverter:
         print abi_header.group(1)
         symbol.ARCH = abi_header.group(2)
         self.UpdateAbiRegexes()
-      return
+      return ret
     if self.trace_line.match(line):
+      ret = True
       match = self.trace_line.match(line)
       (unused_0, frame, unused_1,
        code_addr, area, symbol_present, symbol_name) = match.groups()
@@ -218,8 +221,9 @@ class TraceConverter:
     if self.code_line.match(line):
       # Code lines should be ignored. If this were exluded the 'code around'
       # sections would trigger value_line matches.
-      return
+      return ret
     if self.value_line.match(line):
+      ret = True
       match = self.value_line.match(line)
       (unused_, addr, value, area, symbol_present, symbol_name) = match.groups()
       if area == "<unknown>" or area == "[heap]" or area == "[stack]" or not area:
@@ -241,7 +245,7 @@ class TraceConverter:
                             object_symbol_with_offset,
                             source_location))
 
-    #self.PrintOutput(self.trace_lines, self.value_lines)
+    return ret
 
 
 example_arm_crash = """