This is to track dynamic amount of stack growth for aarch64, so it is possible to print out offensive functions that may consume too much stack. For example,
0xffff2000084d1270 try_to_unmap_one [vmlinux]: Dynamic (0xcf0) 0xffff200008538358 migrate_page_move_mapping [vmlinux]: Dynamic (0xc60) 0xffff2000081276c8 copy_process.isra.2 [vmlinux]: Dynamic (0xb20) 0xffff200008424958 show_free_areas [vmlinux]: Dynamic (0xb40) 0xffff200008545178 __split_huge_pmd_locked [vmlinux]: Dynamic (0xb30) 0xffff200008555120 collapse_shmem [vmlinux]: Dynamic (0xbc0) 0xffff20000862e0d0 do_direct_IO [vmlinux]: Dynamic (0xb70) 0xffff200008cc0aa0 md_do_sync [vmlinux]: Dynamic (0xb90) Signed-off-by: Qian Cai <[email protected]> --- scripts/checkstack.pl | 2 ++ 1 file changed, 2 insertions(+) diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl index 34414c6efad6..122aef5e4e14 100755 --- a/scripts/checkstack.pl +++ b/scripts/checkstack.pl @@ -48,7 +48,9 @@ my (@stack, $re, $dre, $x, $xs, $funcre); $funcre = qr/^$x* <(.*)>:$/; if ($arch eq 'aarch64') { #ffffffc0006325cc: a9bb7bfd stp x29, x30, [sp, #-80]! + #a110: d11643ff sub sp, sp, #0x590 $re = qr/^.*stp.*sp, \#-([0-9]{1,8})\]\!/o; + $dre = qr/^.*sub.*sp, sp, #(0x$x{1,8})/o; } elsif ($arch eq 'arm') { #c0008ffc: e24dd064 sub sp, sp, #100 ; 0x64 $re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o; -- 2.17.2 (Apple Git-113)
