Dump INFO CODE_ID containing Build ID in Linux dump_syms

src/common/linux/file_id.cc

 // Copyright (c) 2006, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
@@ skipping 146 matching lines @@
 }
 
 bool FileID::ElfFileIdentifier(wasteful_vector<uint8_t>& identifier) {
   MemoryMappedFile mapped_file(path_.c_str(), 0);
   if (!mapped_file.data())  // Should probably check if size >= ElfW(Ehdr)?
     return false;
 
   return ElfFileIdentifierFromMappedFile(mapped_file.data(), identifier);
 }
 
-// This function is not ever called in an unsafe context, so it's OK
+// These three functions are not ever called in an unsafe context, so it's OK
 // to allocate memory and use libc.
+static string bytes_to_hex_string(const uint8_t* bytes, size_t count) {
+  string result;
+  for (unsigned int idx = 0; idx < count; ++idx) {
+    char buf[3];
+    snprintf(buf, sizeof(buf), "%02X", bytes[idx]);
+    result.append(buf);
+  }
+  return result;
+}
+
 // static
 string FileID::ConvertIdentifierToUUIDString(
     const wasteful_vector<uint8_t>& identifier) {
   uint8_t identifier_swapped[kMDGUIDSize] = { 0 };
 
   // Endian-ness swap to match dump processor expectation.
   memcpy(identifier_swapped, &identifier[0],
          std::min(kMDGUIDSize, identifier.size()));
   uint32_t* data1 = reinterpret_cast<uint32_t*>(identifier_swapped);
   *data1 = htonl(*data1);
   uint16_t* data2 = reinterpret_cast<uint16_t*>(identifier_swapped + 4);
   *data2 = htons(*data2);
   uint16_t* data3 = reinterpret_cast<uint16_t*>(identifier_swapped + 6);
   *data3 = htons(*data3);
 
-  string result;
-  for (unsigned int idx = 0; idx < kMDGUIDSize; ++idx) {
-    char buf[3];
-    snprintf(buf, sizeof(buf), "%02X", identifier_swapped[idx]);
-    result.append(buf);
-  }
-  return result;
+  return bytes_to_hex_string(identifier_swapped, kMDGUIDSize);
+}
+
+// static
+string FileID::ConvertIdentifierToString(
+    const wasteful_vector<uint8_t>& identifier) {
+  return bytes_to_hex_string(&identifier[0], identifier.size());
 }
 
 }  // namespace google_breakpad