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 7b3e1e37854006c21a389f8d6a13be8f8b5f2644..98c1edaf7aa13d966c0d99687685401069b3aecc 100644 (file)
--- 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");
 }