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Posted to issues@trafficserver.apache.org by "weijin (Issue Comment Edited) (JIRA)" <ji...@apache.org> on 2012/02/27 07:08:49 UTC
[jira] [Issue Comment Edited] (TS-1109) stack dump may crash too
[ https://issues.apache.org/jira/browse/TS-1109?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13217059#comment-13217059 ]
weijin edited comment on TS-1109 at 2/27/12 6:08 AM:
-----------------------------------------------------
{code}
Breakpoint 1, ink_stack_trace_get (stack=0x7fffffffb4d0, len=100, signalhandler_frame=2) at ink_stack_trace.cc:85
85 {
(gdb) n
87 if ((btl = backtrace(stack, len)) > 0) {
(gdb)
88 if (signalhandler_frame)
(gdb)
89 ink_restore_signal_handler_frame(stack, btl, signalhandler_frame + 1);
(gdb) s
ink_restore_signal_handler_frame (stack=0x7fffffffb4d0, len=<value optimized out>, signalhandler_frame=2) at ink_stack_trace.cc:63
63 asm volatile ("mov %%rbp,%0":"=r" (fp));
(gdb) info reg rbp
rbp 0x2 0x2
(gdb) n
67 for (i = 0; i < signalhandler_frame; i++)
(gdb)
68 fp = (void **) (*fp);
(gdb)
Program received signal SIGSEGV, Segmentation fault.
{code}
was (Author: taorui):
Breakpoint 1, ink_stack_trace_get (stack=0x7fffffffb4d0, len=100, signalhandler_frame=2) at ink_stack_trace.cc:85
85 {
(gdb) n
87 if ((btl = backtrace(stack, len)) > 0) {
(gdb)
88 if (signalhandler_frame)
(gdb)
89 ink_restore_signal_handler_frame(stack, btl, signalhandler_frame + 1);
(gdb) s
ink_restore_signal_handler_frame (stack=0x7fffffffb4d0, len=<value optimized out>, signalhandler_frame=2) at ink_stack_trace.cc:63
63 asm volatile ("mov %%rbp,%0":"=r" (fp));
(gdb) info reg rbp
rbp 0x2 0x2
(gdb) n
67 for (i = 0; i < signalhandler_frame; i++)
(gdb)
68 fp = (void **) (*fp);
(gdb)
Program received signal SIGSEGV, Segmentation fault.
> stack dump may crash too
> ------------------------
>
> Key: TS-1109
> URL: https://issues.apache.org/jira/browse/TS-1109
> Project: Traffic Server
> Issue Type: Bug
> Components: Core
> Affects Versions: 3.1.2
> Reporter: Zhao Yongming
> Assignee: weijin
> Labels: crash
> Fix For: 3.1.4
>
>
> the codes doing stack dump may crash, in this case you will not able to get a core file, that will hide most of the rare issues.
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