Question

The mysql has the following code:
table->file->ha_write_row(table->record[0]))

where table->record[0] is a buffer whose size is determined by another variable reclength. Now I know the reclength, see it’s 203. And I want to see the value (table->record[0])[0..202], which means from the first byte to the last byte. If I just put (table->record[0]) in the watch, it only display several chars as there are many 0 inside table->record[0], say it could be like “xxx\\0\\0\\0yyy…”, In this case, eclipse only show “xxx” in the watch window as it thinks “xxx\0” is the complete string terminated by “\\0”, but actually I want to see more buffer value. So I used (table->record[0])[i] in the watch, i is 0 , 1, 2 .., but that’s boring, is there any good way to see all of them?

Answer 1

Use the gdb syntax for printing array values, for array whose first element is pointed to by pointer p, use:

p@100

To see first 100 elements. In your case, edit your watch expression (left click -> Edit Watch Expression) to:

table->record@100

You didn’t mention the type of table->record — I am assuming it holds the pointer (and not the pointer-to-pointer).

And btw, you can cast your pointer to any data type, exactly as in a gdb console.