gdb: Custom Debug Info

 
 29.4 Custom Debug Info
 ======================
 
 Generating debug information in platform-native file formats (like ELF
 or COFF) may be an overkill for JIT compilers; especially if all the
 debug info is used for is displaying a meaningful backtrace.  The issue
 can be resolved by having the JIT writers decide on a debug info format
 and also provide a reader that parses the debug info generated by the
 JIT compiler.  This section gives a brief overview on writing such a
 parser.  More specific details can be found in the source file
 'gdb/jit-reader.in', which is also installed as a header at
 'INCLUDEDIR/gdb/jit-reader.h' for easy inclusion.
 
    The reader is implemented as a shared object (so this functionality
 is not available on platforms which don't allow loading shared objects
 at runtime).  Two GDB commands, 'jit-reader-load' and
 'jit-reader-unload' are provided, to be used to load and unload the
 readers from a preconfigured directory.  Once loaded, the shared object
 is used the parse the debug information emitted by the JIT compiler.
 

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