[Xen-devel] Segmentation fault of gdbserver-xen

[Akio Takebe <takebe_akio@xxxxxxxxxxxxxx>]

Hi,

I tried to run gdbserver-xen with --file on xen-x86_64.
But I have the following fault.
Do anyone have the same error?
Or do I have mistakes?

# gdbserver-xen 127.0.0.1:9999 --file /var/xen/dump/vm1.1.core 
Attached; pid = 3
Segmentation fault

A part of the strace is below.

mmap(NULL, 1264480, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 
0) = 0x2b01270d9000
mprotect(0x2b01270e5000, 1215328, PROT_NONE) = 0
mmap(0x2b01271e4000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|
MAP_DENYWRITE, 3, 0xb000) = 0x2b01271e4000
mmap(0x2b01271e5000, 166752, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED
|MAP_ANONYMOUS, -1, 0) = 0x2b01271e5000
close(3)                                = 0
open("/lib64/tls/libc.so.6", O_RDONLY)  = -1 ENOENT (No such file or 
directory)
open("/lib64/libc.so.6", O_RDONLY)      = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\300\313"..., 
640) = 640
fstat(3, {st_mode=S_IFREG|0755, st_size=1485035, ...}) = 0
mmap(0x386c200000, 2303368, PROT_READ|PROT_EXEC, MAP_PRIVATE|
MAP_DENYWRITE, 3, 0) = 0x386c200000
mprotect(0x386c329000, 1086856, PROT_NONE) = 0
mmap(0x386c428000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|
MAP_DENYWRITE, 3, 0x128000) = 0x386c428000
mmap(0x386c42e000, 17800, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|
MAP_ANONYMOUS, -1, 0) = 0x386c42e000
close(3)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) 
= 0x2b012720e000
mprotect(0x386c428000, 12288, PROT_READ) = 0
munmap(0x2b01270b3000, 154694)          = 0
open("2006-0823-1442.14-vm1.1.core", O_RDONLY) = 3
open("/proc/xen/privcmd", O_RDWR)       = 4
fcntl(4, F_GETFD)                       = 0
fcntl(4, F_SETFD, FD_CLOEXEC)           = 0
brk(0)                                  = 0x50d000
brk(0x52e000)                           = 0x52e000
rt_sigaction(SIGRT_1, {SIG_IGN}, {SIG_DFL}, 8) = 0
write(2, "Attached; pid = 3\n", 18)     = 18
read(3, "\355\353\17\360\1\0\0\0\355\371\0\0\30\0\0\0H\24\0\0\0"..., 24) 
= 24
read(3, "\177\3\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\200"..., 
5168) = 5168
mmap(NULL, 512000, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 
0) = 0x2b012720f000
read(3, "\2520\20\0\0\0\0\0:9\20\0\0\0\0\0\2764\20\0\0\0\0\0\333"..., 
511848) = 511848
mmap(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 
0) = 0x2b012728c000
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++

Best Regards,

Akio Takebe


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