70 Chapter 5
Troubleshooting Your Application
Using A/P API Tracing
AP_TRACE_MAX_UDATA:. The maximum amount of user data (in
bytes) that will be displayed when parameters are displayed.
Default = 16.
Tracing Using Global Variables
A/P API tracing is controlled by three global variables. The variables are
described below:
Selecting Types of Tracing
The level of A/P tracing is controlled by the ap_trace variable.
The ap_trace variable is defined as a bitmask that can be set to
particular values (as defined in the file /opt/ots/lib/api_trace.h) and as
listed in the following table.
For example, if you want to trace output parameters only, you would set
ap_trace to API_TR_OUTPUT.
ap_trace An integer value which constitutes a
bitmask to control the level of tracing
performed. By default this mask is 0.
ap_trace_fp A pointer to a UNIX file to receive the
tracing output. By default this is set to
stderr.
ap_trace_max_udata The maximum amount of user data (in
bytes) that will be displayed during tracing.
The default is 16.
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