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6.3.1 Warnings

There are a couple of situations in which cg_annotate issues warnings.

• If a source file is more recent than the ‘cachegrind.out.<pid>’ file. This is because the information in ‘cachegrind.out.<pid>’ is only recorded with line numbers, so if the line numbers change at all in the source (e.g. lines added, deleted, swapped), any annotations will be incorrect.
• If information is recorded about line numbers past the end of a file. This can be caused by the above problem, i.e. shortening the source file while using an old ‘cachegrind.out.<pid>’ file. If this happens, the figures for the bogus lines are printed anyway (clearly marked as bogus) in case they are important.