dex_symbols.md

Dex Symbols

Dex symbols are those with a section of:

• .dex.method (Java methods)
• .dex (All other forms of dex size. E.g. Class descriptors)

Algorithm

During builds:

• Java compile targets create a mapping between Java fully qualified names (FQN) and source files.
  • For .java files the FQN of the public class is mapped to the file.
  • For .srcjar files the FQN of the public class is mapped to the .srcjar file path.
  • A complete per-apk class FQN to source mapping is stored in the $output_dir/size-info dir.

During supersize archive:

1. $ANDROID_SDK/cmdline-tools/apkanalyzer dex packages is used to find the size and FQN of entries in across all dex files.
   • One symbol is created for each method and class entry in the output.
2. Source paths are added to symbols using the mapping from $output_dir/Foo.apk.jar.info