If an executable is compiled for profiling, then it
accepts a special command-line runtime system argument, show-prof,
that outputs information about the source functions that are profiled.
Normally, this information is used by mlprof. This page documents
the show-prof output format, and is intended for those working on
the profiler internals.
The show-prof output is ASCII, and consists of a sequence of lines.
-
The magic number of the executable.
-
The number of source names in the executable.
-
A line for each source name giving the name of the function, a tab, the filename of the file containing the function, a colon, a space, and the line number that the function starts on in that file.
-
The number of (split) source functions.
-
A line for each (split) source function, where each line consists of a source-name index (into the array of source names) and a successors index (into the array of split-source sequences, defined below).
-
The number of split-source sequences.
-
A line for each split-source sequence, where each line is a space separated list of (split) source functions.
The latter two arrays, split sources and split-source sequences, define a directed graph, which is the call-graph of the program.