TOPS-20 PASCAL Language Manual - Bitsavers

P~SDDT:
THE PASCAL-?O DEBUGGER
To reset a tracepoint that you have turned off with CLEAR
9.4.3), use the following format of the TRACE command:
(Section
where:
TRACE (AT) J line number }
tbreak identifier
line number is the line number of an existing tracepoint
that you want to reset.
break identifier is the name of an existing tracepoint that
you want to reset.
The following rules apply to the use of TRACE:
If you specify a trace identifier, but not a line number, the
following happens:
• If there is already a tracepoint with this identifier, this
tracepoint is used.
• If there is no tracepoint with this identifier, an error
occurs.
If you specify a line number, but not a trace identifier, the
following happens:
• If a tracepoint is assigned for this
tracepoint is used.
location,
that
•
If a tracepoint has not been assigned, a new tracepoint is
established with the identifier NO NAME. You can have more
than one tracepoint with the name NO NAME.
If you specify both a line number and a trace identifier, the
following happens:
• If a tracepoint has already been assigned for this location
with this identifier, the previously defined tracepoint is
used.
• If a tracepoint has already been assigned for this location
with a different identifier, an error occurs.
• If a tracepoint has already been assigned at another location
with this identifier, and no tracepoint has been set at this
location, PASDDT prints a warning message. PASDDT then
asks if you want to override the address associated with the
previous tracepoint. If so, the previous tracepoint is
discarded, and a new tracepoint is declared with the given
identifier and location.
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