|
 |
d67611 |
From 0f162febebc4d11a165dd40cee00f3b0ba691a52 Mon Sep 17 00:00:00 2001
|
|
|
d67611 |
From: Qi Zheng <zhengqi.arch@bytedance.com>
|
|
|
d67611 |
Date: Tue, 24 May 2022 20:25:54 +0800
|
|
|
d67611 |
Subject: [PATCH 08/18] bt: arm64: add support for 'bt -n idle'
|
|
|
d67611 |
|
|
|
d67611 |
The '-n idle' option of bt command can help us filter the
|
|
|
d67611 |
stack of the idle process when debugging the dumpfiles
|
|
|
d67611 |
captured by kdump.
|
|
|
d67611 |
|
|
|
d67611 |
This patch supports this feature on ARM64.
|
|
|
d67611 |
|
|
|
d67611 |
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
|
|
|
d67611 |
Signed-off-by: Lianbo Jiang <lijiang@redhat.com>
|
|
|
d67611 |
---
|
|
|
d67611 |
arm64.c | 19 ++++++++++++++++---
|
|
|
d67611 |
help.c | 2 +-
|
|
|
d67611 |
kernel.c | 3 ++-
|
|
|
d67611 |
3 files changed, 19 insertions(+), 5 deletions(-)
|
|
|
d67611 |
|
|
|
d67611 |
diff --git a/arm64.c b/arm64.c
|
|
|
d67611 |
index 65f6cdf69fa6..0f615cf52bef 100644
|
|
|
d67611 |
--- a/arm64.c
|
|
|
d67611 |
+++ b/arm64.c
|
|
|
d67611 |
@@ -3681,6 +3681,12 @@ arm64_get_dumpfile_stackframe(struct bt_info *bt, struct arm64_stackframe *frame
|
|
|
d67611 |
{
|
|
|
d67611 |
struct machine_specific *ms = machdep->machspec;
|
|
|
d67611 |
struct arm64_pt_regs *ptregs;
|
|
|
d67611 |
+ bool skip = false;
|
|
|
d67611 |
+
|
|
|
d67611 |
+ if (bt->flags & BT_SKIP_IDLE) {
|
|
|
d67611 |
+ skip = true;
|
|
|
d67611 |
+ bt->flags &= ~BT_SKIP_IDLE;
|
|
|
d67611 |
+ }
|
|
|
d67611 |
|
|
|
d67611 |
if (!ms->panic_task_regs ||
|
|
|
d67611 |
(!ms->panic_task_regs[bt->tc->processor].sp &&
|
|
|
d67611 |
@@ -3713,8 +3719,11 @@ try_kernel:
|
|
|
d67611 |
}
|
|
|
d67611 |
|
|
|
d67611 |
if (arm64_in_kdump_text(bt, frame) ||
|
|
|
d67611 |
- arm64_in_kdump_text_on_irq_stack(bt))
|
|
|
d67611 |
+ arm64_in_kdump_text_on_irq_stack(bt)) {
|
|
|
d67611 |
bt->flags |= BT_KDUMP_ADJUST;
|
|
|
d67611 |
+ if (skip && is_idle_thread(bt->task))
|
|
|
d67611 |
+ bt->flags |= BT_SKIP_IDLE;
|
|
|
d67611 |
+ }
|
|
|
d67611 |
|
|
|
d67611 |
return TRUE;
|
|
|
d67611 |
}
|
|
|
d67611 |
@@ -3738,10 +3747,14 @@ arm64_get_stack_frame(struct bt_info *bt, ulong *pcp, ulong *spp)
|
|
|
d67611 |
int ret;
|
|
|
d67611 |
struct arm64_stackframe stackframe = { 0 };
|
|
|
d67611 |
|
|
|
d67611 |
- if (DUMPFILE() && is_task_active(bt->task))
|
|
|
d67611 |
+ if (DUMPFILE() && is_task_active(bt->task)) {
|
|
|
d67611 |
ret = arm64_get_dumpfile_stackframe(bt, &stackframe);
|
|
|
d67611 |
- else
|
|
|
d67611 |
+ } else {
|
|
|
d67611 |
+ if (bt->flags & BT_SKIP_IDLE)
|
|
|
d67611 |
+ bt->flags &= ~BT_SKIP_IDLE;
|
|
|
d67611 |
+
|
|
|
d67611 |
ret = arm64_get_stackframe(bt, &stackframe);
|
|
|
d67611 |
+ }
|
|
|
d67611 |
|
|
|
d67611 |
if (!ret)
|
|
|
d67611 |
error(WARNING,
|
|
|
d67611 |
diff --git a/help.c b/help.c
|
|
|
d67611 |
index e1bbc5abe029..99214c1590fa 100644
|
|
|
d67611 |
--- a/help.c
|
|
|
d67611 |
+++ b/help.c
|
|
|
d67611 |
@@ -1915,7 +1915,7 @@ char *help_bt[] = {
|
|
|
d67611 |
" -a displays the stack traces of the active task on each CPU.",
|
|
|
d67611 |
" (only applicable to crash dumps)",
|
|
|
d67611 |
" -A same as -a, but also displays vector registers (S390X only).",
|
|
|
d67611 |
-" -n idle filter the stack of idle tasks (x86_64).",
|
|
|
d67611 |
+" -n idle filter the stack of idle tasks (x86_64, arm64).",
|
|
|
d67611 |
" (only applicable to crash dumps)",
|
|
|
d67611 |
" -p display the stack trace of the panic task only.",
|
|
|
d67611 |
" (only applicable to crash dumps)",
|
|
|
d67611 |
diff --git a/kernel.c b/kernel.c
|
|
|
d67611 |
index 411e9da1e54f..a521ef30cdb0 100644
|
|
|
d67611 |
--- a/kernel.c
|
|
|
d67611 |
+++ b/kernel.c
|
|
|
d67611 |
@@ -2673,7 +2673,8 @@ cmd_bt(void)
|
|
|
d67611 |
break;
|
|
|
d67611 |
|
|
|
d67611 |
case 'n':
|
|
|
d67611 |
- if (machine_type("X86_64") && STREQ(optarg, "idle"))
|
|
|
d67611 |
+ if ((machine_type("X86_64") || machine_type("ARM64")) &&
|
|
|
d67611 |
+ STREQ(optarg, "idle"))
|
|
|
d67611 |
bt->flags |= BT_SKIP_IDLE;
|
|
|
d67611 |
else
|
|
|
d67611 |
option_not_supported(c);
|
|
|
d67611 |
--
|
|
|
d67611 |
2.30.2
|
|
|
d67611 |
|