From: Ben Gras <ben@minix3.org>
Date: Tue, 2 Nov 2010 21:27:04 +0000 (+0000)
Subject: kernel: limit stacktrace depth to 50.
X-Git-Tag: v3.2.0~761
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/rndc.html?a=commitdiff_plain;h=515e8d075fee056e169e0a2af4ec25de0466db7e;p=minix.git

kernel: limit stacktrace depth to 50.

  - Unlikely to discard useful information and avoids long
    system lockups on machines configured to print system output to serial.
---

diff --git a/kernel/arch/i386/exception.c b/kernel/arch/i386/exception.c
index 7b3e1e378..98c1edaf7 100644
--- a/kernel/arch/i386/exception.c
+++ b/kernel/arch/i386/exception.c
@@ -251,6 +251,7 @@ PUBLIC void proc_stacktrace(struct proc *whichproc)
 {
 	reg_t v_bp, v_pc, v_hbp;
 	int iskernel;
+	int n = 0;
 
 	v_bp = whichproc->p_reg.fp;
 
@@ -279,6 +280,8 @@ PUBLIC void proc_stacktrace(struct proc *whichproc)
 			break;
 		}
 		v_bp = v_hbp;
+		if(n++ > 50)
+			break;
 	}
 	printf("\n");
 }