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HP OpenVMS System Analysis Tools Manual
SDA$DBG_IMAGE_INFO
Displays a list of activated images together with their virtual address
ranges for debugging purposes.
Format
void sda$dbg_image_info ();
Arguments
None.
Description
A list of the images currently activated, with their start and end
addresses, is displayed. This is provided as a debugging aid for SDA
extensions.
Condition Values Returned
Example
SDA outputs the list of images in the following format:
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Current VMS Version: "X6DX-FT1"
Process Activated Images:
Start VA End VA Image Name
00010000 000301FF SDA
00032000 00177FFF SDA$SHARE
7B508000 7B58BFFF DECC$SHR
7B2D8000 7B399FFF DPML$SHR
7B288000 7B2C9FFF CMA$TIS_SHR
7B698000 7B6D9FFF LBRSHR
0021A000 0025A3FF SCRSHR
00178000 002187FF SMGSHR
7B1E8000 7B239FFF LIBRTL
7B248000 7B279FFF LIBOTS
80C140D0 80C23120 SYS$BASE_IMAGE
80C036B8 80C05288 SYS$PUBLIC_VECTORS
002C6000 002D31FF PRGDEVMSG
002D4000 002DA9FF SHRIMGMSG
002DC000 002DFFFF DECC$MSG
00380000 003E03FF MBX$SDA
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SDA$DEALLOCATE
Deallocates and frees dynamic memory.
Format
void sda$deallocate (void *ptr_block, uint32 size);
Arguments
ptr_block
| OpenVMS usage |
address |
| type |
longword (unsigned) |
| access |
read only |
| mechanism |
by value |
Starting address of block to be freed.
size
| OpenVMS usage |
longword_unsigned |
| type |
longword (unsigned) |
| access |
read only |
| mechanism |
by value |
Size of block to deallocate (in bytes).
Description
The specified memory is deallocated. Note that this is the only
supported mechanism for deallocation of dynamic memory.
Related Routine
SDA$ALLOCATE
Condition Values Returned
If an error occurs, it is signaled and the SDA session aborted.
Example
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PCB *local_pcb;
...
sda$deallocate ((void *)local_pcb, PCB$C_LENGTH;
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This call deallocates the block of length PCB$C_LENGTH whose address is
stored in the pointer LOCAL_PCB.
SDA$DELETE_PREFIX
Deletes all symbols with the specified prefix.
Format
void sda$delete_prefix (char *prefix);
Argument
prefix
| OpenVMS usage |
char_string |
| type |
character string |
| access |
read only |
| mechanism |
by reference |
The address of the prefix string.
Description
This routine searches the SDA symbol table and deletes all symbols that
begin with the specified string.
Condition Values Returned
SDA$DISPLAY_HELP
Displays online help.
Format
void sda$display_help (char *library_desc, char *topic_desc);
Arguments
library
| OpenVMS usage |
char_string |
| type |
character string |
| access |
read only |
| mechanism |
by reference |
Address of library filespec. Specify as zero-terminated ASCII string.
topic
| OpenVMS usage |
char_string |
| type |
character string |
| access |
read only |
| mechanism |
by reference |
Address of topic name. Specify as zero-terminated ASCII string.
Description
Help from the specified library is displayed on the given topic.
Condition Values Returned
Example
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sda$display_help ("SYS$HELP:SDA", "HELP");
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This call produces the following output at the terminal:
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HELP
The System Dump Analyzer (SDA) allows you to inspect the contents
of memory as saved in the dump taken at crash time or as exists
in a running system. You can use SDA interactively or in batch
mode. You can send the output from SDA to a listing file. You can
use SDA to perform the following operations:
Assign a value to a symbol
Examine memory of any process
Format instructions and blocks of data
Display device data structures
Display memory management data structures
Display a summary of all processes on the system
Display the SDA symbol table
Copy the system dump file
Send output to a file or device
Read global symbols from any object module
Send output to a file or device
Read global symbols from any object module
Search memory for a given value
For help on performing these functions, use the HELP command and
specify a topic.
Format
HELP [topic-name]
Additional information available:
Parameter
HELP Subtopic?
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SDA$ENSURE
Ensures sufficient space on the current output page.
Format
void sda$ensure (uint32 lines);
Argument
lines
| OpenVMS usage |
longword_unsigned |
| type |
longword (unsigned) |
| access |
read only |
| mechanism |
by value |
Number of lines to fit on a page.
Description
This routine checks and makes sure that the number of lines specified
fit on the current page; otherwise, it issues a page break.
Condition Values Returned
Example
This call ensures that there are five lines left on the current page,
and it outputs a page break if there are not.
SDA$FAO
Formats data into a buffer.
Format
char * sda$fao (char * ctrstr, char * buffer, int buflen,
__optional_params);
Arguments
ctrstr
| OpenVMS usage |
char_string |
| type |
character-coded text string |
| access |
read only |
| mechanism |
by reference |
Addess of a zero-terminated FAO control string.
buffer
| OpenVMS usage |
char_string |
| type |
character string |
| access |
write only |
| mechanism |
by reference |
Address of a string buffer into which to store the formatted string.
buflen
| OpenVMS usage |
longword_unsigned |
| type |
longword (unsigned) |
| access |
read only |
| mechanism |
by value |
Maximum size of the string buffer.
prmlst
| OpenVMS usage |
varying_arg |
| type |
quadword (signed or unsigned) |
| access |
read only |
| mechanism |
by value |
Optional FAO parameters. All arguments after buflen are copied into a
quadword parameter list, as used by $FAOL_64.
Description
Formats data into a buffer as a zero-terminated string.
Condition Values Returned
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Address of terminating zero
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SDA$FAO returns the address of the terminating zero in the output
buffer. This allows successive calls to SDA$FAO to append strings.
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Example
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char faobuf [16];
char *faoptr;
faoptr = sda$fao ( "!XL",
faobuf, sizeof (faobuf),
0xffffffff);
sda$fao ( ".!XL",
faoptr, sizeof (faobuf) - strlen (faobuf),
0x80102030);
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This example shows the use of SDA$FAO to append a formatted string to
another formatted string.
SDA$FID_TO_NAME
Translates a file identification (FID) into the equivalent file name.
Format
int sda$fid_to_name (char *devptr, unsigned short *fidptr, char
*bufptr, int buflen );
Arguments
devptr
| OpenVMS usage |
char_string |
| type |
character string |
| access |
read only |
| mechanism |
by reference |
The address of the device name string. The device name must be supplied
in allocation-class device name (ALLDEVNAM) format, but any leading
underscore or trailing colon are ignored.
fidptr
| OpenVMS usage |
address |
| type |
file identification |
| access |
read only |
| mechanism |
by reference |
The address of the three-word file identification.
bufptr
| OpenVMS usage |
char_string |
| type |
character string |
| access |
write only |
| mechanism |
by reference |
The address of a string buffer into which to store the file name string.
buflen
| OpenVMS usage |
longword |
| type |
longword (unsigned) |
| access |
read only |
| mechanism |
by value |
The maximum length of the string buffer.
Description
When analyzing the current system, this routine calls LIB$FID_TO_NAME
to translate the file identification into a file name. When analyzing a
dump, if there is a file data collection available and the specified
disk and file identification is included in the collection, the
recorded file name will be returned. Return the error condition
SDA$_NOCOLLECT if there is no collection (for the entire system, this
disk, or just this file).
Condition Values Returned
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SDA$_SUCCESS
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File identification successfully translated.
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SDA$_NOCOLLECT
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No collection available for the system, the specified disk, or the file
identification.
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Others
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An error occurred when LIB$FID_TO_NAME was called.
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Example
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int status;
char buffer [132];
char *device = $1$DKA0;
unsigned short fid [3] = {1, 1, 0};
status = sda$fid_to_name (device, &fid [0], buffer, 132);
if (status & 1)
sda$print ("Filename is !AZ", buffer);
else
sda$print ("File ID could not be translated");
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This example shows the translation of file ID (1,1,0) on $1$DKA0:,
which is $1$DKA0:[000000]INDEXF.SYS;1.
SDA$FORMAT
Displays the formatted contents of a data structure.
Format
void sda$format (VOID_PQ struct_addr, __optional_params);
Arguments
struct_addr
| OpenVMS usage |
address |
| type |
quadword (unsigned) |
| access |
read only |
| mechanism |
by value |
The address in the system dump of the data structure to be formatted.
options
| OpenVMS usage |
mask_longword |
| type |
longword (unsigned) |
| access |
read only |
| mechanism |
by value |
The following provides more information on options:
| Option |
Meaning |
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None
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Uses structure type from the xxx$B_TYPE and/or xxx$B_SUBTYPE field of
the structure. This is the default.
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SDA_OPT$M_FORMAT_TYPE
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Uses the structure type given in struct_prefix.
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SDA_OPT$M_FORMAT_PHYSICAL
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Indicates that struct_addr is a physical address instead of a virtual
address.
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struct_prefix
| OpenVMS usage |
char_string |
| type |
character string |
| access |
read only |
| mechanism |
by reference |
Address of structure name string (zero-terminated).
Description
This routine displays the formatted content of a data structure that
begins at the address specified. If no symbol prefix is passed, then
SDA tries to find the symbols associated with the block type specified
in the block-type byte of the data structure.
Condition Values Returned
Example
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PCB *local_pcb;
PHD *local_phd;
...
sda$format (local_pcb);
sda$format (local_phd, SDA_OPT$M_FORMAT_TYPE, "PHD");
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The first call formats the structure whose system address is held in
the variable LOCAL_PCB, determining the type from the type and/or
subtype byte of the structure. The second call formats the structure
whose system address is held in the variable LOCAL_PHD, using PHD
symbols.
SDA$FORMAT_HEADING
Formats a new page heading.
Format
void sda$format_heading (char *ctrstr, __optional_params);
Arguments
ctrstr
| OpenVMS usage |
char_string |
| type |
character-coded text string |
| access |
read only |
| mechanism |
by reference |
Address of control string (zero-terminated ASCII string).
prmlst
| OpenVMS usage |
varying_arg |
| type |
quadword (signed or unsigned) |
| access |
read only |
| mechanism |
by value |
FAO parameters that are optional. All arguments after the control
string are copied into a quadword parameter list as used by $FAOL_64.
Description
This routine prepares and saves the page heading to be used whenever
SDA$NEW_PAGE is called. Nothing is output either until SDA$NEW_PAGE is
next called, or a page break is necessary because the current page is
full.
Condition Values Returned
If the $FAOL_64 call issued by SDA$FORMAT_HEADING fails, the control
string is used as the page heading.
Example
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char hw_name[64];
...
sda$get_hw_name (hw_name, sizeof(hw_name));
sda$format_heading (
"SDA Extension Commands, system type !AZ",
&hw_name);
sda$new_page ();
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This example produces the following heading:
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SDA Extension Commands, system type DEC 3000 Model 400
------------------------------------------------------
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