(gprof.info)Debugging


Debugging `gprof'
-----------------

   If `gprof' was compiled with debugging enabled, the `-d' option
triggers debugging output (to stdout) which can be helpful in
understanding its operation.  The debugging number specified is
interpreted as a sum of the following options:

2 - Topological sort
     Monitor depth-first numbering of symbols during call graph analysis

4 - Cycles
     Shows symbols as they are identified as cycle heads

16 - Tallying
     As the call graph arcs are read, show each arc and how the total
     calls to each function are tallied

32 - Call graph arc sorting
     Details sorting individual parents/children within each call graph
     entry

64 - Reading histogram and call graph records
     Shows address ranges of histograms as they are read, and each call
     graph arc

128 - Symbol table
     Reading, classifying, and sorting the symbol table from the object
     file.  For line-by-line profiling (`-l' option), also shows line
     numbers being assigned to memory addresses.

256 - Static call graph
     Trace operation of `-c' option

512 - Symbol table and arc table lookups
     Detail operation of lookup routines

1024 - Call graph propagation
     Shows how function times are propagated along the call graph

2048 - Basic-blocks
     Shows basic-block records as they are read from profile data (only
     meaningful with `-l' option)

4096 - Symspecs
     Shows symspec-to-symbol pattern matching operation

8192 - Annotate source
     Tracks operation of `-A' option


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