Document revision date: 30 March 2001

## OpenVMS Debugger Manual

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## CANCEL ALL

> Cancels all breakpoints, tracepoints, and watchpoints. Restores the scope and type to their default values. Restores the line, symbolic, and G_floating modes established with the SET MODE command to their default values.

### Format

> CANCEL ALL

### Qualifiers

> #### /PREDEFINED

> Cancels all predefined (but no user-defined) breakpoints and tracepoints.

> #### /USER

> Cancels all user-defined (but no predefined) breakpoints, tracepoints, and watchpoints. This is the default unless you specify /PREDEFINED.

### Description

> The CANCEL ALL command does the following:
> 1. Cancels all user-defined eventpoints (those created with the commands SET BREAK, SET TRACE, and SET WATCH). This is equivalent to entering the commands CANCEL BREAK/ALL, CANCEL TRACE/ALL, and CANCEL WATCH/ALL. Depending on the type of program (for example Ada, multiprocess), certain predefined breakpoints or tracepoints might be set automatically when you start the debugger. To cancel all predefined but no user-defined eventpoints, use CANCEL ALL/PREDEFINED. To cancel all predefined and user-defined eventpoints, use CANCEL ALL/PREDEFINED/USER.
> 2. Restores the scope search list to its default value (0,1,2,...,n). This is equivalent to entering the CANCEL SCOPE command.
> 3. Restores the data type for memory locations that are associated with a compiler-generated type to the associated type. Restores the type for locations that are not associated with a compiler-generated type to "longword integer". This is equivalent to entering the CANCEL TYPE/OVERRIDE and SET TYPE LONGWORD commands.
> 4. Restores the line, symbolic, and G_floating modes established with the SET MODE command to their default values. This is equivalent to entering the following command:

>        DBG> SET MODE LINE,SYMBOLIC,NOG_FLOAT

> The CANCEL ALL command does not affect the current language setting or modules included in the run-time symbol table.

> Related commands:

> > (CANCEL,DEACTIVATE) BREAK
> > CANCEL SCOPE
> > (CANCEL,DEACTIVATE) TRACE
> > CANCEL TYPE/OVERRIDE
> > (CANCEL,DEACTIVATE) WATCH
> > (SET,CANCEL) MODE
> > SET TYPE

### Examples

#1
    DBG> CANCEL ALL

> 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 are no predefined breakpoints or tracepoints.

#2
    DBG> CANCEL ALL
    %DEBUG-I-PREDEPTNOT, predefined eventpoint(s) not canceled

> 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

> 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

#1
    DBG> CANCEL BREAK MAIN\LOOP+10

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

#2
    DBG> CANCEL BREAK/ALL

> This command cancels all user-defined breakpoints.

#3
    DBG> CANCEL BREAK/ALL/USER/PREDEFINED

> This command cancels all user-defined and predefined breakpoints.

#4
    all> 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.

#5
    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 POSIX Threads or Ada routines.

## CANCEL DISPLAY

> Permanently deletes a screen display.

> Note This command is not available in the Compaq DECwindows Motif for OpenVMS user 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.

### 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

#1
    DBG> CANCEL DISPLAY SRC2

> This command deletes display SRC2.

#2
    DBG> CANCEL DISPLAY/ALL

> This command deletes all displays, except the PROMPT display.

## 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 Compaq DECwindows Motif for OpenVMS user 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 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

#1
    DBG> CANCEL RADIX

> This command restores the default input and output radix.

#2
    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 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

#1
    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.

#2
    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.

#3
    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 the SET SOURCE/EXACT command, but also affects the SET SOURCE [JONES] command.

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