http://llvm.org/bugs/show_bug.cgi?id=18894
Bug ID: 18894
Summary: inferior process exits due to SIGTRAP after detach on
FreeBSD
Product: lldb
Version: unspecified
Hardware: PC
OS: FreeBSD
Status: NEW
Severity: normal
Priority: P
Component: All Bugs
Assignee: [email protected]
Reporter: [email protected]
Classification: Unclassified
Invoke lldb against some target e.g. /bin/sleep, set a breakpoint, run, then
detach when the breakpoint is hit. The inferior dumps core with SIGTRAP.
(LLDB r201577)
Typescript:
joule% bin/lldb /bin/sleep 60
Current executable set to '/bin/sleep' (x86_64).
(lldb) b main
Breakpoint 1: where = sleep`main + 20 at sleep.c:75, address =
0x0000000000400964
(lldb) run
Process 26485 launching
Process 26485 stopped
(lldb) Process 26485 launched: '/bin/sleep' (x86_64)
Process 26485 stopped
* thread #1: tid = 100436, 0x0000000000400964 sleep`main(argc=<unavailable>,
argv=0x00007fffffffd730) + 20 at sleep.c:75, stop reason = breakpoint 1.1
frame #0: 0x0000000000400964 sleep`main(argc=<unavailable>,
argv=0x00007fffffffd730) + 20 at sleep.c:75
72 if (argc != 2)
73 usage();
74
-> 75 if (sscanf(argv[1], "%lf%1s", &d, buf) != 1)
76 usage();
77 if (d > INT_MAX)
78 usage();
(lldb) detach
Process 26485 detached
(lldb) Detaching from process 26485
(lldb) quit
joule% ls sleep.core
sleep.core
joule% bin/lldb /bin/sleep -c sleep.core
Core file '/data/emaste/src/llvm/build/sleep.core' (x86_64) was loaded.
Process 0 stopped
* thread #1: tid = 0, 0x0000000000400965 sleep`main(argc=<unavailable>,
argv=0x00007fffffffd730) + 21 at sleep.c:75, name = 'sleep', stop reason =
signal SIGTRAP
frame #0: 0x0000000000400965 sleep`main(argc=<unavailable>,
argv=0x00007fffffffd730) + 21 at sleep.c:75
72 if (argc != 2)
73 usage();
74
-> 75 if (sscanf(argv[1], "%lf%1s", &d, buf) != 1)
76 usage();
77 if (d > INT_MAX)
78 usage();
(lldb)
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