From: Qian Cai <cai@lca.pw>
To: akpm@linux-foundation.org
Cc: catalin.marinas@arm.com, will.deacon@arm.com,
linux-kernel@vger.kernel.org, Qian Cai <cai@lca.pw>
Subject: [PATCH] checkstack.pl: dynamic stack growth for aarch64
Date: Fri, 7 Dec 2018 21:51:43 -0500 [thread overview]
Message-ID: <20181208025143.39363-1-cai@lca.pw> (raw)
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 <cai@lca.pw>
---
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)
reply other threads:[~2018-12-08 2:52 UTC|newest]
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