diff options
Diffstat (limited to 'tapset/context-unwind.stp')
| -rw-r--r-- | tapset/context-unwind.stp | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/tapset/context-unwind.stp b/tapset/context-unwind.stp index 59d111ee..7c96b7e2 100644 --- a/tapset/context-unwind.stp +++ b/tapset/context-unwind.stp @@ -23,10 +23,11 @@ * except that deeper stack nesting may be supported. Return nothing. */ function print_backtrace () %{ - if (! CONTEXT->regs) - WARN_ON (! CONTEXT->regs); - else - _stp_stack_print(CONTEXT->regs, 1, CONTEXT->pi, MAXTRACE); + if (CONTEXT->regs) { + _stp_stack_print(CONTEXT->regs, 1, CONTEXT->pi, MAXTRACE); + } else { + _stp_printf("Systemtap probe: %s\n", CONTEXT->probe_point); + } %} /** @@ -36,10 +37,10 @@ function print_backtrace () %{ * stack. It may be truncated due to maximum string length. */ function backtrace:string () %{ /* pure */ - if (! CONTEXT->regs) - WARN_ON (! CONTEXT->regs); - else - _stp_stack_snprint (THIS->__retvalue, MAXSTRINGLEN, CONTEXT->regs, 0, CONTEXT->pi, MAXTRACE); + if (CONTEXT->regs) + _stp_stack_snprint (THIS->__retvalue, MAXSTRINGLEN, CONTEXT->regs, 0, CONTEXT->pi, MAXTRACE); + else + strlcpy (THIS->__retvalue, "", MAXSTRINGLEN); %} /** |