gdb: Add a macro to walk memory allocations

Add a macro to walk all memory allocations in a core file.

load the file in gdb:
source /path/to/frr/gdb/lib.txt
mg_walk mg_first
(gdb) mq_walk mg_first
showing active allocations in memory group libfrr
memstats: BFD info:0
memstats: Buffer:5
memstats: Buffer data:0
memstats: Host config:6
memstats: Completion item:0
memstats: Command Tokens:2585
memstats: Command Token Text:1951
memstats: Command Token Help:1951
memstats: Command Argument:0
memstats: Command Argument Name:575
memstats: Command Match Stack:0
memstats: Lexer token (temporary):0
memstats: Path Computation Algorithms:0
memstats: Distribute ctx:0
memstats: Distribute list:0
memstats: Dist-list ifname:0
memstats: Dist-list name:0
memstats: error information:0
memstats: Access List:0
memstats: Access List Str:0
memstats: Access Filter:0
memstats: RCU thread:0
<snip>

Signed-off-by: Donald Sharp <sharpd@nvidia.com>
This commit is contained in:
Donald Sharp 2022-08-23 16:31:02 -04:00
parent 9e7103f6b7
commit 1a6c318d64
1 changed files with 22 additions and 0 deletions

View File

@ -293,3 +293,25 @@ Arguments:
1st: A (struct route_node *) to the top of the route table.
2nd: The (struct route_node *) to walk up from
end
define mq_walk
set $mg = (struct memgroup *)$arg0
while ($mg)
printf "showing active allocations in memory group %s\n", $mg->name
set $mt = (struct memtype *)$mg->types
while ($mt)
printf "memstats: %s:%zu\n", $mt->name, $mt->n_alloc
set $mt = $mt->next
end
set $mg = $mg->next
end
document mg_walk
Walk the memory data structures to show what is holding memory.
Arguments:
1st: A (struct memgroup *) where to start the walk. If you are not
sure where to start pass it mg_first, which is a global DS for
all memory allocated in FRR
end