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Transcripts, Alerts, and Logs

April 7, 2015 in Alerts and Logs, OS-VVM in general

Transcripts, Alerts, and Logs are the focus of the 2015.01 and 2015.03. What are these all about?

Transcript Files

OSVVM’s transcript capability simplifies having different parts of a testbench print to a common transcript file. It does this by providing an internal file identifier (TranscriptFile), and subprograms for opening (TranscriptOpen) files, closing (TranscriptClose) files, printing (print and writeline), and checking if the file is open (IsTranscriptOpen).

Read more at: Testbench Transcripting


OSVVM’s AlertLogPkg simplifies and formalizes the signaling errors (at run time), counting errors, and reporting errors (summary at test completion). Indication of an error is done via a call to one of the Alert procedures (Alert, AlertIf, AlertIfNot, AlertIfEqual, AlertIfNotEqual, or AlertIfDiff). Alerts have the levels FAILURE, ERROR, or Warning. Each level is counted and tracked in an internal data structure. Within the data structure, each of these can be enabled or disabled. A test can be stopped if an alert value has been signaled too many times. Stop values for each counter can be set. At the end of a test, the procedure ReportAlerts prints a report that provides pass/fail and a count of the different alert values.

Read more at: Using Alerts


Logs provide a mechanism to conditionally print information. Verbosity control allows messages that are too detailed for normal testing to be printed when specifically enabled. Logs have the levels ALWAYS, DEBUG, FINAL, and INFO.

Read more at: Using Logs