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The Question is: an 7.2 ECO mentions the following: o V7.2 TRACE users who call TBK$SHOW_TRACEBACK directly may get ACCVIOs. Images Affected: [SYSLIB]TRACE.EXE Question, this TBK$SHOW_TRACEBACK, does it have a public/documented interface? if not, perhaps a sly hint? sounds like it could be handy, if not for production use, but mundane development hacking. thanks. -ldb The Answer is : The OpenVMS Alpha traceback API is neither documented nor supported. As for a hint: Consider acquiring the source listings for details on calling traceback directly. See the FAQ for the part numbers. Here is another hint: here is the declaration of the (undocumented and unsupported and subject to change without notice) OpenVMS Alpha traceback call from the OpenVMS Alpha V7.1 source listings: TBK$SHOW_TRACEBACK( FAULTING_FP : QUAD, FAULTING_SP : QUAD, FAULTING_PC : QUAD, DETAIL_LEVEL : LONG, USER_ACTION_PROCEDURE : REF VECTOR[,LONG], USER_ARG : LONG) ! FUNCTION ! This routine returns formatted information about the program call ! stack and passes that information to the specified or default ! action routine. (For consistency, the arguments are modeled after ! other LIB$SHOW* routines). ! INPUTS ! FAULTING_FP - The FP which identifies the invocation (i.e., frame) ! at which the traceback is to begin. For image activator- ! invoked traceback, this value is the FP at which the ! fault occured (which invokes traceback). For consumers ! of the callable interface, this is simply the current ! FP value (or the FP of an earlier invocation). The FP ! value must be consistent with the values in ! FAULTING_SP and FAULTING_PC. ! FAULTING_SP - The SP which identifies the invocation (i.e., frame) ! at which the traceback is to begin. For image activator- ! invoked traceback, this value is the SP at which the ! fault occured (which causes traceback to be invoked). ! For consumers of the callable interface, this is simply ! the current SP value (or the SP of an earlier ! invocation). The SP value must be consistent with the ! values in FAULTING_FP and FAULTING_PC. ! FAULTING_PC - The PC which identifies the invocation (i.e., frame) ! at which the traceback is to begin. For image activator- ! invoked traceback, this value is the PC at which the ! fault occured (which causes traceback to be invoked). ! For consumers of the callable interface, this is simply ! the current PC value (or the PC of an earlier ! invocation). The PC value must be consistent with the ! values in FAULTING_FP and FAULTING_SP. ! DETAIL_LEVEL - An identifier code specifying the level of detail ! required by the user. The following are valid values ! for DETAIL_LEVEL. (CURRENTLY IGNORED) ! 0 - nonsymbolic traceback, including header ! USER_ACTION_PROCEDURE - ! Optional user-supplied action routine. By default ! this routine prints traceback information to SYS$OUTPUT ! via LIB$PUT_OUTPUT. ! USER_ARG - Optional value to be passed directly to the action ! routine without interpretation.
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