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#!/usr/bin/ruby
# -*- coding: us-ascii -*-
# Used to create dummy probes (as for systemtap and DTrace) by Makefiles.
# See common.mk.
text = ARGF.read
# remove comments
text.gsub!(%r'(?:^ *)?/\*.*?\*/\n?'m, '')
# remove the pragma declarations and ifdefs
text.gsub!(/^#(?:pragma|include|if|endif).*\n/, '')
# replace the provider section with the start of the header file
text.gsub!(/provider ruby \{/, "#ifndef\t_PROBES_H\n#define\t_PROBES_H\n#define DTRACE_PROBES_DISABLED 1\n")
# finish up the #ifndef sandwich
text.gsub!(/\};/, "\n#endif\t/* _PROBES_H */")
# expand probes to DTRACE macros
text.gsub!(/^ *probe ([^\(]*)\(([^\)]*)\);/) {
name, args = $1, $2
name.upcase!
name.gsub!(/__/, '_')
args.gsub!(/(\A|, *)[^,]*\b(?=\w+(?=,|\z))/, '\1')
"#define RUBY_DTRACE_#{name}_ENABLED() 0\n" \
"#define RUBY_DTRACE_#{name}(#{args}) do {} while (0)"
}
puts "/* -*- c -*- */"
print text
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