6.2. Runtime Errors and Warnings
Runtime errors and warnings occur when the SystemTap
instrumentation has been installed and is collecting data on
the system.
WARNING: Number of errors: N, skipped probes: M
Errors and/or skipped probes occurred during this run. Both
N and M are
the counts of the number of probes that were not executed due to
conditions such as too much time required to execute event handlers over
an interval of time.
division by 0
The script code performed an invalid division.
aggregate element not found
A statistics extractor function other than @count
was invoked on an aggregate that has not had any values accumulated yet.
This is similar to a division by zero.
aggregation overflow
An array containing aggregate values contains too many distinct key pairs at this time.
MAXNESTING exceeded
Too many levels of function call nesting were attempted.
The default nesting of function calls allowed is 10.
MAXACTION exceeded
The probe handler attempted to execute too many statements in the
probe handler. The default number of actions allowed in a probe handler
is 1000.
kernel/user string copy fault at ADDR
The probe handler attempted to copy a string from kernel or
user space at an invalid address (ADDR).
pointer dereference fault
There was a fault encountered during a pointer
dereference operation such as a target variable evaluation.