| Title: | DIGITAL UNIX (FORMERLY KNOWN AS DEC OSF/1) |
| Notice: | Welcome to the Digital UNIX Conference |
| Moderator: | SMURF::DENHAM |
| Created: | Thu Mar 16 1995 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 10068 |
| Total number of notes: | 35879 |
Hello, Please suggestion me. I would like to examine the big structure. The structure is otto_data ( In ATM structure's). I tried this, (dbx) px * ( struct otto_data *)0xfffffc00006fee20 expression too large to evaluate (dbx) (kdbx) px * ( struct otto_data *)0xfffffc00006fee20 expression too large to evaluate What kind of errors ? K.Nagai
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 9756.1 | SMURF::DENHAM | Digital UNIX Kernel | Thu May 08 1997 09:37 | 3 | |
Try the same thing using the ladebug debugger, if you have it.
It will probably work -- ladebug -k. I've seen the same problem in
dbx and ladebug works around it...
| |||||
| 9756.2 | basically implies the size is larger than 20,000 bytes... | QUARRY::petert | rigidly defined areas of doubt and uncertainty | Thu May 08 1997 13:07 | 20 |
Dbx uses an internal stack in order to evaluate expressions. We usually see this error message when trying to evaluate an array or structure. In dbx the size of the stack has been fixed (probably at an arbitary value that was thought to be large enough) at 20,000 bytes. If the size of the structure is larger than this, then we get the "too big to evaluate" error. I have an example that routinely gets this error because we are looking at an automatic array in fortran that has not yet been fully set up. Dbx thinks it is a very large sized array at the point that it stops, but since dbx stops on the dimension statement, if it goes one past that, it sees that it is actually only an array of one. I tried the same program in ladebug, which stops, like dbx on the dimension statement, before the array is truly set up, and ladebug started printing out all 58000 or so elements. This is probably worth a QAR. These days large data arrays and structures are probably not all that unusual and maybe we should make the stack dynamic, or grow the stack if need be. PeterT | |||||
| 9756.3 | fine! | TKTVFS::NAGAI_K | katsuya nagai | Fri May 09 1997 03:03 | 11 |
Thank's, quick reply. We tried to use ladebug. I can look at needed data. Thank you so far. | |||||