From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/lib/bug.c | 18 ++++++++++++++++--
1 files changed, 16 insertions(+), 2 deletions(-)
diff --git a/kernel/lib/bug.c b/kernel/lib/bug.c
index f4fcac5..f6d9aac 100644
--- a/kernel/lib/bug.c
+++ b/kernel/lib/bug.c
@@ -47,6 +47,9 @@
#include <linux/bug.h>
#include <linux/sched.h>
#include <linux/rculist.h>
+#include <linux/ftrace.h>
+
+#include <trace/hooks/bug.h>
extern struct bug_entry __start___bug_table[], __stop___bug_table[];
@@ -153,6 +156,8 @@
if (!bug)
return BUG_TRAP_TYPE_NONE;
+ disable_trace_on_warning();
+
file = NULL;
line = 0;
@@ -178,6 +183,15 @@
bug->flags |= BUGFLAG_DONE;
}
+ /*
+ * BUG() and WARN_ON() families don't print a custom debug message
+ * before triggering the exception handler, so we must add the
+ * "cut here" line now. WARN() issues its own "cut here" before the
+ * extra debugging message it writes before triggering the handler.
+ */
+ if ((bug->flags & BUGFLAG_NO_CUT_HERE) == 0)
+ printk(KERN_DEFAULT CUT_HERE);
+
if (warning) {
/* this is a WARN_ON rather than BUG/BUG_ON */
__warn(file, line, (void *)bugaddr, BUG_GET_TAINT(bug), regs,
@@ -185,14 +199,14 @@
return BUG_TRAP_TYPE_WARN;
}
- printk(KERN_DEFAULT CUT_HERE);
-
if (file)
pr_crit("kernel BUG at %s:%u!\n", file, line);
else
pr_crit("Kernel BUG at %pB [verbose debug info unavailable]\n",
(void *)bugaddr);
+ trace_android_rvh_report_bug(file, line, bugaddr);
+
return BUG_TRAP_TYPE_BUG;
}
--
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