IBM User Guide for Java V7 on Windows > Troubleshooting and support > Using diagnostic tools > Using the Reliability, Availability, and Serviceability Interface > Intercepting trace data

Calling external trace

If an external trace routine has been registered and a tracepoint has been enabled for external trace, it is called with the following parameters:

env

Pointer to the JNIEnv for the current thread.

traceid

Trace identifier

format

A zero-terminated string that describes the format of the variable argument list that follows. The possible values for each character position are:

0x01 One character
0x02 Short
0x04 Int
0x08 Double or long long
0xfe Pointer to java/lang/String object
0xff ASCII string pointer (can be NULL)
0x00 End of format string

If the format pointer is NULL, no trace data follows.

varargs

A va_list of zero or more arguments as defined in format argument.

Parent: Intercepting trace data

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