OpenVMS Debugger Manual

This command cancels all user-defined breakpoints and tracepoints and all watchpoints, and restores scopes, types, and some modes to their default values. In this example, there is a predefined breakpoint or tracepoint; this is not canceled by default. #3

DBG> CANCEL ALL/PREDEFINED

This command cancels all predefined breakpoints and tracepoints, and restores scopes, types, and some modes to their default values. No user-defined breakpoints or tracepoints are affected.

CANCEL BREAK

Cancels a breakpoint.

Format

CANCEL BREAK [address-expression[,...]]

PARAMETERS

address-expression
Specifies a breakpoint to be canceled. Do not use the asterisk (*) wildcard character. Instead, use the /ALL qualifier. Do not specify an address expression when using any qualifiers except /EVENT, /PREDEFINED, or /USER.

QUALIFIERS

/ACTIVATING
Applies to a multiprocess debugging configuration (when DBG$PROCESS has the value MULTIPROCESS). Cancels the effect of a previous SET BREAK/ACTIVATING command.
/ALL
By default, cancels all user-defined breakpoints. When used with /PREDEFINED, cancels all predefined breakpoints but no user-defined breakpoints. To cancel all breakpoints, use CANCEL BREAK/ALL/USER/PREDEFINED.
/BRANCH
Cancels the effect of a previous SET BREAK/BRANCH command.
/CALL
Cancels the effect of a previous SET BREAK/CALL command.
/EVENT=event-name
Cancels the effect of a previous SET BREAK/EVENT=event-name command. Specify the event name (and address expression, if any) exactly as specified with the SET BREAK/EVENT command. To identify the current event facility and the associated event names, use the SHOW EVENT_FACILITY command.
/EXCEPTION
Cancels the effect of a previous SET BREAK/EXCEPTION command.
/HANDLER
Cancels the effect of a previous SET BREAK/HANDLER command.
/INSTRUCTION
Cancels the effect of a previous SET BREAK/INSTRUCTION command.
/LINE
Cancels the effect of a previous SET BREAK/LINE command.
/PREDEFINED
Cancels a specified predefined breakpoint without affecting any user-defined breakpoints. When used with /ALL, cancels all predefined breakpoints.
/SYSEMULATE
(Alpha only) Cancels the effect of a previous SET BREAK/SYSEMULATE command.
/TERMINATING
Cancels the effect of a previous SET BREAK/TERMINATING command.
/UNALIGNED_DATA
(Alpha only) Cancels the effect of a previous SET BREAK/UNALIGNED_DATA command.
/USER
Cancels a specified user-defined breakpoint without affecting any predefined breakpoints. This is the default unless you specify /PREDEFINED. To cancel all user-defined breakpoints, use the /ALL qualifier.
/VECTOR_INSTRUCTION
(VAX only) Cancels the effect of a previous SET BREAK/VECTOR_INSTRUCTION command.

DESCRIPTION

Breakpoints can be user defined or predefined. User-defined breakpoints are set explicitly with the SET BREAK command. Predefined breakpoints, which depend on the type of program you are debugging (for example, Ada or ZQUIT multiprocess), are established automatically when you start the debugger. Use the SHOW BREAK command to identify all breakpoints that are currently set. Any predefined breakpoints are identified as such.
User-defined and predefined breakpoints are set and canceled independently. For example, a location or event can have both a user-defined and a predefined breakpoint. Canceling the user-defined breakpoint does not affect the predefined breakpoint, and conversely.
To cancel only user-defined breakpoints, do not specify /PREDEFINED with the CANCEL BREAK command (the default is /USER). To cancel only predefined breakpoints, specify /PREDEFINED but not /USER. To cancel both predefined and user-defined breakpoints, specify both /PREDEFINED and /USER.
In general, the effect of the CANCEL BREAK command is symmetrical with that of the SET BREAK command (even though the SET BREAK command is used only with user-defined breakpoints). Thus, to cancel a breakpoint that was established at a specific location, specify that same location (address expression) with the CANCEL BREAK command. To cancel breakpoints that were established on a class of instructions or events, specify the class of instructions or events with the corresponding qualifier (/LINE, /BRANCH, /ACTIVATING, /EVENT=, and so on). For more information, see the qualifier descriptions.
If you want the debugger to ignore a breakpoint without your having to cancel it (for example, if you want to rerun the program with and without breakpoints), use the DEACTIVATE BREAK instead of the CANCEL BREAK command. Later, you can activate the breakpoint (with ACTIVATE BREAK).
Related commands:

(ACTIVATE,DEACTIVATE) BREAK
CANCEL ALL
(SET,SHOW) BREAK
(SET,SHOW) EVENT_FACILITY
(SET,SHOW,CANCEL) TRACE

Examples

DBG> CANCEL BREAK MAIN\LOOP+10

This command cancels the user-defined breakpoint set at the address expression MAIN\LOOP+10.

DBG> CANCEL BREAK/ALL

This command cancels all user-defined breakpoints.

DBG> CANCEL BREAK/ALL/USER/PREDEFINED

This command cancels all user-defined and predefined breakpoints.

DBG_1> CANCEL BREAK/ACTIVATING

This command cancels a previous user-defined SET BREAK/ACTIVATING command. As a result, the debugger does not suspend execution when a new process is brought under debugger control.

DBG> CANCEL BREAK/EVENT=EXCEPTION_TERMINATED/PREDEFINED

This command cancels the predefined breakpoint set on task terminations due to unhandled exceptions. This breakpoint is predefined for Ada programs and programs that call DECthreads or Ada routines.

CANCEL DISPLAY

Permanently deletes a screen display.

Note
This command is not available in the DECwindows Motif interface to the debugger.

Format

CANCEL DISPLAY [display-name[,...]]

PARAMETERS

display-name
Specifies the name of a display to be canceled. Do not specify the PROMPT display, which cannot be canceled. Do not use the asterisk (*) wildcard character. Instead, use the /ALL qualifier. Do not specify a display name with /ALL.

QUALIFIERS

/ALL
Cancels all displays, except the PROMPT display.
/SUFFIX[=process-identifier-type]
Applies to a multiprocess debugging configuration (when DBG$PROCESS has the value MULTIPROCESS). Appends a process-identifying suffix to a display name. Use this qualifier only directly after a display name. The suffix denotes the visible process at the time the command was issued.
The /SUFFIX qualifier is used primarily in command procedures when you specify display definitions or key definitions that are bound to display definitions.
Use any of the following process-identifier-type keywords:

PROCESS_NAME The display-name suffix is the process name.

PROCESS_NUMBER The display-name suffix is the process number (as shown in a SHOW PROCESS display).

PROCESS_PID The display-name suffix is the process identifier (PID).

If you specify /SUFFIX without a process-identifier-type keyword, the process identifier type used for the display-name suffix is, by default, the same as that used for the prompt suffix (see the SET PROMPT/SUFFIX command).

DESCRIPTION

When a display is canceled, its contents are permanently lost, it is deleted from the display list, and all the memory that was allocated to it is released.
You cannot cancel the PROMPT display.
Related commands:

(SHOW) DISPLAY
(SET,SHOW,CANCEL) WINDOW

Examples

DBG> CANCEL DISPLAY SRC2

This command deletes display SRC2.

DBG> CANCEL DISPLAY/ALL

This command deletes all displays, except the PROMPT display.

CANCEL IMAGE

Deletes symbol table information for a shareable image.

Format

CANCEL IMAGE [image-name[,...]]

PARAMETERS

image-name
Specifies a previously set shareable image to be canceled. Do not specify the main image, which cannot be canceled. Do not use the asterisk (*) wildcard character. Instead, use the /ALL qualifier. Do not specify an image name with /ALL.

QUALIFIERS

/ALL
Specifies that all shareable images except the main image are to be canceled.

DESCRIPTION

The CANCEL IMAGE command deallocates the data structures previously built to debug a shareable image by a SET IMAGE command. Use the CANCEL IMAGE command if the debugger performance has slowed down because of many images and modules being set. You can also use the CANCEL MODULE command to delete only certain modules from an image's run-time symbol table (RST) without canceling the entire image. Also, if dynamic mode is enabled (which is the default), you can disable it with the SET MODE NODYNAMIC command. As a result, the debugger does not set images or modules automatically.
If the current image (the image last set with the SET IMAGE command) is canceled, the main image (the image containing the image transfer address) becomes the current image.
Related commands:

(SET,SHOW) IMAGE
SET MODE [NO]DYNAMIC
(SET,SHOW,CANCEL) MODULE

Example

DBG> CANCEL IMAGE SHARE2,SHARE3

This command cancels shareable images SHARE2 and SHARE3. If either of these was the current image, the main image becomes the current image.

CANCEL MODE

Restores the line, symbolic, and G_floating modes established by the SET MODE command to their default values. Also restores the default input/output radix.

Note
This command is not available in the DECwindows Motif interface to the debugger.

Format

CANCEL MODE

DESCRIPTION

The effect of the CANCEL MODE command is equivalent to the following commands:
DBG> SET MODE LINE,SYMBOLIC,NOG_FLOAT
DBG> CANCEL RADIX
The default radix for both data entry and display is decimal for most languages.
On VAX processors, the exceptions are BLISS and MACRO--32, which have a default radix of hexadecimal. On Alpha processors, the exceptions are BLISS, MACRO--32, and MACRO--64, which have a default radix of hexadecimal.
Related commands:

(SET,SHOW) MODE
(SET,SHOW,CANCEL) RADIX

Example

DBG> CANCEL MODE

This command restores the default radix mode and all default mode values.

CANCEL MODULE

Deletes the symbol records of a module in the current image from the run-time symbol table (RST) for that image.

Note
The current image is either the main image (by default) or the image established as the current image by a previous SET IMAGE command.

Format

CANCEL MODULE [module-name[,...]]

PARAMETERS

module-name
Specifies the name of a module whose symbol records are deleted from the RST. Do not use the asterisk (*) wildcard character. Instead, use the /ALL qualifier. Do not specify a module name with /ALL.

QUALIFIERS

/ALL
Deletes the symbol records of all modules from the RST. Do not specify /[NO]RELATED with this qualifier.
/RELATED (default)

/NORELATED
(Applies to Ada programs.) Controls whether the debugger deletes from the RST the symbol records of a module that is related to a specified module through a with-clause or subunit relationship.
The CANCEL MODULE/RELATED command deletes symbol records for related modules as well as for those specified, but not for any module that is also related to another set module. The effect of CANCEL MODULE/RELATED is consistent with Ada's scope and visibility rules and depends on the actual relationship between modules. The CANCEL MODULE/NORELATED command deletes symbol records only for modules that are specified (no symbol records are deleted for related modules).

DESCRIPTION

Use the CANCEL MODULE command if the debugger performance has slowed down because of many modules being set. You can also use the CANCEL IMAGE command to delete the symbols of an entire image (this automatically cancels all of the modules in that image). Also, if dynamic mode is enabled (which is the default), you can disable it with the SET MODE NODYNAMIC command. As a result, the debugger does not set modules or images automatically.
The CANCEL MODULE command does not cancel any breakpoints, tracepoints, or watchpoints that are set currently. It deletes the symbolization of any breakpoints, tracepoints, or watchpoints associated with the canceled modules.
Related commands:

(SET,SHOW,CANCEL) IMAGE
SET MODE [NO]DYNAMIC
(SET,SHOW) MODULE

Examples

DBG> CANCEL MODULE SUB1

This command deletes the symbols of module SUB1 from the RST.

DBG> CANCEL MODULE/ALL

This command deletes the symbols of all modules from the RST.

CANCEL RADIX

Restores the default radix for the entry and display of integer data.

Format

CANCEL RADIX

QUALIFIERS

/OVERRIDE
Cancels the override radix established by a previous SET RADIX/OVERRIDE command. This sets the current override radix to "none" and restores the output radix mode to the value established with a previous SET RADIX or SET RADIX/OUTPUT command. If you did not change the radix mode with a SET RADIX or SET RADIX/OUTPUT command, the CANCEL RADIX/OVERRIDE command restores the radix mode to its default value.

DESCRIPTION

The CANCEL RADIX command cancels the effect of any previous SET RADIX and SET RADIX/OVERRIDE commands. It restores the input and output radix to their default value. The default radix for both data entry and display is decimal for most languages.
On VAX processors, the exceptions are BLISS and MACRO--32, which have a default radix of hexadecimal. On Alpha processors, the exceptions are BLISS, MACRO--32, and MACRO--64, which have a default radix of hexadecimal.
The effect of the CANCEL RADIX/OVERRIDE command is more limited and is explained in the description of the /OVERRIDE qualifier.
Related commands:

EVALUATE
(SET,SHOW) RADIX

Examples

DBG> CANCEL RADIX

This command restores the default input and output radix.

DBG> CANCEL RADIX/OVERRIDE

This command cancels any override radix you might have set with the SET RADIX/OVERRIDE command.

CANCEL SCOPE

Restores the default scope search list for symbol lookup.

Format

CANCEL SCOPE

DESCRIPTION

The CANCEL SCOPE command cancels the current scope search list established by a previous SET SCOPE command and restores the default scope search list, namely 0,1,2,...,n, where n is the number of calls in the call stack.
The default scope search list specifies that, for a symbol without a path-name prefix, a symbol lookup such as EXAMINE X first looks for X in the routine that is currently executing (scope 0); if no X is visible there, the debugger looks in the caller of that routine (scope 1), and so on down the call stack; if X is not found in scope n, the debugger searches the rest of the run-time symbol table (RST), then searches the global symbol table (GST), if necessary.
Related commands:

(SET,SHOW) SCOPE

Example

DBG> CANCEL SCOPE

This command cancels the current scope.

CANCEL SOURCE

Cancels a source directory search list, a source directory search method, or both a list and method established by a previous SET SOURCE command.

Format

CANCEL SOURCE

QUALIFIERS

/DISPLAY
Cancels the effect of a previous SET SOURCE/DISPLAY command, which specifies the directory search list to be used by the debugger when displaying source code. Canceling this command means the debugger searches for a source file in the directory in which it was compiled.
/EDIT
Cancels the effect of a previous SET SOURCE/EDIT command, which specifies the directory search list to be used during execution of the debugger's EDIT command. Canceling this command means the debugger searches for a source file in the directory in which it was compiled.
/EXACT
Cancels the effect of a previous SET SOURCE/EXACT command, which specifies a directory search method. Canceling this command means that the debugger no longer searches for the exact version of the source file from compilation; it reverts to the default behavior of searching for the latest version of the file.
/LATEST
Cancels the effect of a previous SET SOURCE/LATEST command, which specifies a directory search method. In this case, the CANCEL SOURCE/LATEST command directs the debugger to return to searching for the exact version of the source file from compilation. Because /LATEST is the default setting, this qualifier only makes sense when used in conjunction with other qualifiers, for example, /MODULE.
/MODULE=module-name
Cancels the effect of a previous SET SOURCE/MODULE=module-name command in which the same module name and qualifiers were specified. (The /MODULE qualifier allows you to specify a unique directory search list, directory search method, or both, for the named module.) You can append one or more of the qualifiers listed above to the SET SOURCE/MODULE and CANCEL SOURCE/MODULE commands.
If you issue a CANCEL SOURCE/MODULE command with additional qualifiers, you cancel the effect of the specified qualifiers on the module. If you issue an unqualified CANCEL SOURCE/MODULE command, the debugger no longer differentiates the module from any other module in your directories.
/ORIGINAL
(Applies to STDL programs only. Requires the installation of the Correlation Facility (a separate layered product) and invocation of the kept debugger.) Cancels the effect of a previous SET SOURCE/ORIGINAL command. The SET SOURCE/ORIGINAL command is required to debug STDL source files, and must be canceled when you debug source files written in other languages.

DESCRIPTION

CANCEL SOURCE cancels the effect of a previous SET SOURCE command. The nature of this cancellation depends on the qualifiers activated in previous SET SOURCE commands. See the CANCEL SOURCE examples to see how CANCEL SOURCE and SET SOURCE interact.
When you issue a SET SOURCE command, be aware that one of the two qualifiers ---/LATEST or /EXACT---will always be active. These qualifiers affect the debugger search method. The /LATEST qualifier directs the debugger to search for the version last created (the highest-numbered version in your directory). The /EXACT qualifier directs the debugger to search for the version last compiled (the version recorded in the debugger symbol table created at compile time). For example, a SET SOURCE/LATEST command might search for SORT.FOR;3 while a SET SOURCE/EXACT command might search for SORT.FOR;1.
CANCEL SOURCE without the /DISPLAY or /EDIT qualifier cancels the effect of both SET SOURCE/DISPLAY and SET SOURCE/EDIT, if both were previously given.
The /DISPLAY qualifier is needed when the files to be displayed are no longer in the compilation directory.
The /EDIT qualifier is needed when the files used for the display of source code are different from the editable files. This is the case with Ada programs. For Ada programs, the (SET,SHOW,CANCEL) SOURCE commands affect the search of files used for source display (the "copied" source files in Ada program libraries); the (SET,SHOW,CANCEL) SOURCE/EDIT commands affect the search of the source files that you edit when using the EDIT command.
For information specific to Ada programs, type HELP Language_Support Ada.
Related commands:

(SET,SHOW) SOURCE

Examples

DBG> SET SOURCE/MODULE=CTEST/EXACT [],SYSTEM::DEVICE:[PROJD]
DBG> SET SOURCE [PROJA],[PROJB],[PETER.PROJC]
...
DBG> SHOW SOURCE 
   source directory search list for CTEST, 
    match the exact source file version: 
        [] 
        SYSTEM::DEVICE:[PROJD] 
    source directory list for all other modules, 
    match the latest source file version: 
        [PROJA] 
        [PROJB] 
        [PETER.PROJC]
DBG> CANCEL SOURCE
DBG> SHOW SOURCE
   source directory search list for CTEST, 
    match the exact source file version: 
        [] 
        SYSTEM::DEVICE:[PROJD] 
    all other source files will try to match 
    the latest source file version

In this example, the SET SOURCE command establishes a directory search list and a search method (the default, latest version) for source files other than CTEST. The CANCEL SOURCE command cancels the directory search list but does not cancel the search method.

DBG> SET SOURCE/MODULE=CTEST/EXACT [],SYSTEM::DEVICE:[PROJD]
DBG> SET SOURCE [PROJA],[PROJB],[PETER.PROJC]
...
DBG> SHOW SOURCE
   source directory search list for CTEST, 
    match the exact source file version: 
        [] 
        SYSTEM::DEVICE:[PROJD] 
    source directory list for all other modules, 
    match the latest source file version: 
        [PROJA] 
        [PROJB] 
        [PETER.PROJC]
 
DBG> CANCEL SOURCE/MODULE=CTEST/EXACT
DBG> SHOW SOURCE
   source directory search list for CTEST, 
    match the latest source file version: 
        [] 
        SYSTEM::DEVICE:[PROJD] 
    source directory list for all other modules, 
    match the latest source file version: 
        [PROJA] 
        [PROJB] 
        [PETER.PROJC]
DBG> CANCEL SOURCE/MODULE=CTEST
DBG> SHOW SOURCE
    source directory list for all modules, 
     match the latest source file version: 
        [PROJA] 
        [PROJB] 
        [PETER.PROJC]

In this example, the SET SOURCE/MODULE=CTEST/EXACT command establishes a directory search list and a search method (exact version) for the source file CTEST. The CANCEL SOURCE/MODULE=CTEST/EXACT command cancels the CTEST search method (returning to the default latest version), and the CANCEL SOURCE/MODULE=CTEST command cancels the CTEST directory search list.

DBG> SET SOURCE /EXACT
DBG> SHOW SOURCE
    no directory search list in effect, 
     match the exact source file
DBG> SET SOURCE [JONES]
DBG> SHOW SOURCE
    source directory list for all modules, 
     match the exact source file version: 
         [JONES]
DBG> CANCEL SOURCE /EXACT
DBG> SHOW SOURCE 
     source directory list for all modules, 
     match the latest source file version: 
         [JONES]

In this example, the SET SOURCE/EXACT command establishes a search method (exact version) that remains in effect for the SET SOURCE [JONES] command. The CANCEL SOURCE/EXACT command not only cancels SET SOURCE/EXACT command, but also affects the SET SOURCE [JONES] command.

CANCEL TRACE

Cancels a tracepoint.

Format

CANCEL TRACE [address-expression[,...]]

PARAMETERS

address-expression
Specifies a tracepoint to be canceled. Do not use the asterisk (*) wildcard character. Instead, use the /ALL qualifier. Do not specify an address expression when using any qualifiers except /EVENT, /PREDEFINED, or /USER.

QUALIFIERS

/ACTIVATING
Applies to a multiprocess debugging configuration (when DBG$PROCESS has the value MULTIPROCESS). Cancels the effect of a previous SET TRACE/ACTIVATING command.
/ALL
By default, cancels all user-defined tracepoints. When used with /PREDEFINED, it cancels all predefined tracepoints but no user-defined tracepoints. To cancel all tracepoints, use /ALL/USER/PREDEFINED.
/BRANCH
Cancels the effect of a previous SET TRACE/BRANCH command.
/CALL
Cancels the effect of a previous SET TRACE/CALL command.
/EVENT=event-name
Cancels the effect of a previous SET TRACE/EVENT=event-name command. Specify the event name (and address expression, if any) exactly as specified with the SET TRACE/EVENT command. To identify the current event facility and the associated event names, use the SHOW EVENT_FACILITY command.
/EXCEPTION
Cancels the effect of a previous SET TRACE/EXCEPTION command.
/INSTRUCTION
Cancels the effect of a previous SET TRACE/INSTRUCTION command.
/LINE
Cancels the effect of a previous SET TRACE/LINE command.
/PREDEFINED
Cancels a specified predefined tracepoint without affecting any user-defined tracepoints. When used with /ALL, it cancels all predefined tracepoints.
/TERMINATING
Cancels the effect of a previous SET TRACE/TERMINATING command.
/USER
Cancels a specified user-defined tracepoint without affecting any predefined tracepoints. This is the default unless you specify /PREDEFINED. To cancel all user-defined tracepoints, use /ALL.
/VECTOR_INSTRUCTION
(VAX only) Cancels the effect of a previous SET TRACE/VECTOR_INSTRUCTION command.

DESCRIPTION

Tracepoints can be user defined or predefined. User-defined tracepoints are explicitly set with the SET TRACE command. Predefined tracepoints, which depend on the type of program you are debugging (for example, Ada or multiprocess), are established automatically when you start the debugger. Use the SHOW TRACE command to identify all tracepoints that are currently set. Any predefined tracepoints are identified as such.

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  4538P031.HTM
  OSSG Documentation
  22-NOV-1996 13:02:18.48
Copyright © Digital Equipment Corporation 1996. All Rights Reserved.

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PROCESS_NAME	The display-name suffix is the process name.
PROCESS_NUMBER	The display-name suffix is the process number (as shown in a SHOW PROCESS display).
PROCESS_PID	The display-name suffix is the process identifier (PID).