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Alpha- and MIPS-based computers use an unusual stack frame, which sometimes requires GDB to search backward in the object code to find the beginning of a function.
To improve response time (especially for embedded applications, where GDB may be restricted to a slow serial line for this search) you may want to limit the size of this search, using one of these commands:
set heuristic-fence-post limit
Restrict GDB to examining at most limit bytes in its
search for the beginning of a function. A value of 0 (the
default) means there is no limit. However, except for 0, the
larger the limit the more bytes heuristic-fence-post
must search
and therefore the longer it takes to run.
show heuristic-fence-post
Display the current limit.
These commands are available only when GDB is configured for debugging programs on Alpha or MIPS processors.
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