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bug#18851: 24.4; emacs cannot be started if the current directory has be
|
From: |
Glenn Morris |
|
Subject: |
bug#18851: 24.4; emacs cannot be started if the current directory has been removed |
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Date: |
Fri, 12 Jun 2015 21:29:05 -0400 |
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User-agent: |
Gnus (www.gnus.org), GNU Emacs (www.gnu.org/software/emacs/) |
Eli Zaretskii wrote:
> Maybe SMC cannot work with current directory removed?
It looks that way, though xsmfns.c already seems to take the necessary
precautions for that case, and a super-quick look at the libSM source
didn't show any obvious issue. The only solution I can think of is to
disable session-management in such a case:
--- a/src/xsmfns.c
+++ b/src/xsmfns.c
@@ -28,6 +28,7 @@ along with GNU Emacs. If not, see
<http://www.gnu.org/licenses/>. */
#include <unistd.h>
#include <sys/param.h>
+#include <errno.h>
#include <stdio.h>
#include "lisp.h"
@@ -402,6 +403,14 @@ x_session_initialize (struct x_display_info *dpyinfo)
SmcCallbacks callbacks;
ptrdiff_t name_len = 0;
+ /* libSM seems to crash if pwd is missing - see bug#18851. */
+ if (! get_current_dir_name ())
+ {
+ fprintf (stderr, "Disabling session management due to pwd error: %s\n",
+ emacs_strerror (errno));
+ return;
+ }
+
ice_fd = -1;
doing_interact = false;
For completeness, here's a backtrace with debug libSM and libICE included.
(What about the address-out-of-bounds in #3?)
bt:
#0 0x00007ffff12e5640 in __memcpy_ssse3_back () from /lib64/libc.so.6
#1 0x00007ffff69df80d in memcpy (__len=<optimized out>,
__src=<optimized out>, __dest=0x15b675c) at /usr/include/bits/string3.h:51
#2 SmcSetProperties (smcConn=<optimized out>, numProps=4,
props=0x7fffffff28e0) at sm_client.c:379
#3 0x0000000000536f5b in smc_save_yourself_CB (smcConn=0xea0370,
clientData=0x0, saveType=1, shutdown=0, interactStyle=0, fast=0)
at xsmfns.c:262
#4 0x00007ffff69e1c5d in _SmcProcessMessage (iceConn=0xea0f90,
clientData=0xea0370, opcode=<optimized out>, length=<optimized out>,
swap=0, replyWait=<optimized out>, replyReadyRet=0x7fffffff2a00)
at sm_process.c:241
#5 0x00007ffff67d1b97 in IceProcessMessages (iceConn=0xea0f90, replyWait=0x0,
replyReadyRet=0x0) at process.c:386
#6 0x00000000005367d5 in x_session_check_input (fd=11, data=0x0)
at xsmfns.c:110
#7 0x0000000000637484 in wait_reading_process_output (time_limit=0, nsecs=0,
read_kbd=-1, do_display=true, wait_for_cell=..., wait_proc=0x0,
just_wait_proc=0) at process.c:5081
#8 0x000000000054e66b in kbd_buffer_get_event (kbp=0x7fffffff2ff8,
used_mouse_menu=0x7fffffff395f, end_time=0x0) at keyboard.c:3927
#9 0x000000000054ac3e in read_event_from_main_queue (end_time=0x0,
local_getcjmp=0x7fffffff3510, used_mouse_menu=0x7fffffff395f)
at keyboard.c:2200
#10 0x000000000054aea3 in read_decoded_event_from_main_queue (end_time=0x0,
local_getcjmp=0x7fffffff3510, prev_event=...,
used_mouse_menu=0x7fffffff395f) at keyboard.c:2265
#11 0x000000000054c421 in read_char (commandflag=1, map=..., prev_event=...,
used_mouse_menu=0x7fffffff395f, end_time=0x0) at keyboard.c:2875
#12 0x0000000000558b68 in read_key_sequence (keybuf=0x7fffffff3b30,
bufsize=30, prompt=..., dont_downcase_last=false,
can_return_switch_frame=true, fix_current_buffer=true,
prevent_redisplay=false) at keyboard.c:9159
#13 0x0000000000548d11 in command_loop_1 () at keyboard.c:1407
#14 0x00000000005e229a in internal_condition_case (
bfun=0x5488f2 <command_loop_1>, handlers=..., hfun=0x5480d7 <cmd_error>)
at eval.c:1348
#15 0x00000000005485fa in command_loop_2 (ignore=...) at keyboard.c:1139
#16 0x00000000005e1a2d in internal_catch (tag=...,
func=0x5485d1 <command_loop_2>, arg=...) at eval.c:1108
#17 0x000000000054859a in command_loop () at keyboard.c:1118
#18 0x0000000000547cb2 in recursive_edit_1 () at keyboard.c:728
#19 0x0000000000547e3c in Frecursive_edit () at keyboard.c:799
#20 0x0000000000545c0f in main (argc=2, argv=0x7fffffff3ff8) at emacs.c:1626
#0 0x00007ffff12e5640 in __memcpy_ssse3_back () from /lib64/libc.so.6
bt full:
#1 0x00007ffff69df80d in memcpy (__len=<optimized out>,
__src=<optimized out>, __dest=0x15b675c) at /usr/include/bits/string3.h:51
No locals.
#2 SmcSetProperties (smcConn=<optimized out>, numProps=4,
props=0x7fffffff28e0) at sm_client.c:379
_i = <optimized out>
_j = 4
iceConn = 0xea0f90
pMsg = <optimized out>
pBuf = 0x15b675c ""
pStart = 0x15b65d0 "\004"
bytes = 400
#3 0x0000000000536f5b in smc_save_yourself_CB (smcConn=0xea0370,
clientData=0x0, saveType=1, shutdown=0, interactStyle=0, fast=0)
at xsmfns.c:262
props = {0x7fffffff2840,
0x7fffffff2860,
0x7fffffff2880,
0x7fffffff28a0,
0xea0a00}
prop_ptr = {{
name = 0xd887e0 "CloneCommand",
type = 0xda4930 "LISTofARRAY8",
num_vals = 1,
vals = 0x7fffffff2700
},
{
name = 0xe733b0 "Program",
type = 0xea0ba0 "ARRAY8",
num_vals = 1,
vals = 0x7fffffff2710
},
{
name = 0xf533a0 "UserID",
type = 0xf54070 "ARRAY8",
num_vals = 1,
vals = 0x7fffffff2720
},
{
name = 0xf54150 "RestartCommand",
type = 0xf54230 "LISTofARRAY8",
num_vals = 5,
vals = 0x1008d10
},
{
name = 0x7fffffff28d0 "\020$|\366\377\177",
type = 0x712665236f658c00 <Address 0x712665236f658c00 out of
bounds>,
num_vals = -159636464,
vals = 0x7ffff7fc6000
}}
values = {{
length = 45,
value = 0xea1460
},
{
length = 5,
value = 0xe64690
},
{
length = 7,
value = 0xe61810
},
{
length = 20421677,
value = 0x1
},
{
length = 500000000,
value = 0x7ffff7de44c9 <check_match.9344+89>
},
{
length = 0,
value = 0x7ffff67c16a8
},
{
length = 10,
value = 0x5b
},
{
length = -456570963,
value = 0x7ffff7de4ccb <do_lookup_x+1803>
},
{
length = 499925475,
value = 0x7fffffff27c0
},
{
length = -159640236,
value = 0x7ffff67c2410
},
{
length = -55088,
value = 0x7fffffff28c0
},
{
length = 45,
value = 0x1231d
},
{
length = 0,
value = 0x0
},
{
length = -134455296,
value = 0x406e31
},
{
length = -159634424,
value = 0x403e10
},
{
length = 0,
value = 0x10000008f
},
{
length = 17519331,
value = 0x7fffffff2988
},
{
length = -54944,
value = 0x1
},
{
length = 16,
value = 0x7fffffff2920
},
{
length = -55232,
value = 0x712665236f658c00
}}
vp = 0x1008d10
val_idx = 3
vp_idx = 4
props_idx = 4
i = 2
smid_opt = 0xf2c690 "--smid=26667490d-357a-48ea-b51a-9851440ed37c"
chdir_opt = 0x0
user_login_name = {
i = 18634644
}
cwd = 0x0
#4 0x00007ffff69e1c5d in _SmcProcessMessage (iceConn=0xea0f90,
clientData=0xea0370, opcode=<optimized out>, length=<optimized out>,
swap=0, replyWait=<optimized out>, replyReadyRet=0x7fffffff2a00)
at sm_process.c:241
pMsg = 0xea4910
errVal = 0 '\000'
errOffset = -1
smcConn = <optimized out>
#5 0x00007ffff67d1b97 in IceProcessMessages (iceConn=0xea0f90, replyWait=0x0,
replyReadyRet=0x0) at process.c:386
processProc = <optimized out>
processMsgInfo = <optimized out>
header = 0xea4910
replyReady = 0
useThisReplyWait = 0x0
retStatus = IceProcessMessagesSuccess
#6 0x00000000005367d5 in x_session_check_input (fd=11, data=0x0)
at xsmfns.c:110
ret = 11
#7 0x0000000000637484 in wait_reading_process_output (time_limit=0, nsecs=0,
read_kbd=-1, do_display=true, wait_for_cell=..., wait_proc=0x0,
just_wait_proc=0) at process.c:5081
d = 0xc5cde8 <fd_callback_info+264>
timeout_reduced_for_timers = true
channel = 11
nfds = 1
Available = {
fds_bits = {2048,
0 <repeats 15 times>}
}
Writeok = {
fds_bits = {0 <repeats 16 times>}
}
check_write = true
check_delay = 0
no_avail = false
xerrno = 11
proc = {
i = 0
}
timeout = {
tv_sec = 0,
tv_nsec = 499969517
}
end_time = {
tv_sec = 5506081,
tv_nsec = 0
}
got_some_input = -1
count = 2
#8 0x000000000054e66b in kbd_buffer_get_event (kbp=0x7fffffff2ff8,
used_mouse_menu=0x7fffffff395f, end_time=0x0) at keyboard.c:3927
do_display = true
obj = {
i = 0
}
#9 0x000000000054ac3e in read_event_from_main_queue (end_time=0x0,
local_getcjmp=0x7fffffff3510, used_mouse_menu=0x7fffffff395f)
at keyboard.c:2200
c = {
i = 0
}
save_jump = {{
__jmpbuf = {0,
0,
0,
0,
0,
0,
0,
0},
__mask_was_saved = 0,
__saved_mask = {
__val = {0 <repeats 16 times>}
}
}}
kb = 0x1dcd6500
#10 0x000000000054aea3 in read_decoded_event_from_main_queue (end_time=0x0,
local_getcjmp=0x7fffffff3510, prev_event=...,
used_mouse_menu=0x7fffffff395f) at keyboard.c:2265
nextevt = {
i = 13589501
}
frame = 0x7fffffff3270
terminal = 0xcf5bfd
events = {{
i = 13076624
},
{
i = 0
},
{
i = 0
},
{
i = 140737488302576
},
{
i = 5506081
},
{
i = 499988655
},
{
i = 140737488302640
},
{
i = 5560959
},
{
i = 13076624
},
{
i = 4294967296
},
{
i = 0
},
{
i = 140737488302640
},
{
i = 5506081
},
{
i = 0
},
{
i = 140737488302688
},
{
i = 5587002
}}
n = 0
#11 0x000000000054c421 in read_char (commandflag=1, map=..., prev_event=...,
used_mouse_menu=0x7fffffff395f, end_time=0x0) at keyboard.c:2875
c = {
i = 0
}
jmpcount = 2
local_getcjmp = {{
__jmpbuf = {0,
-2368210174059533009,
17161965,
43008,
0,
0,
-2368210174200042193,
2368209730108206383},
__mask_was_saved = 0,
__saved_mask = {
__val = {140737488303472,
5506081,
0,
140737488303760,
5643396,
0,
0,
43008,
0,
566608,
0,
0,
0,
12476142,
9644764,
12476117}
}
}}
save_jump = {{
__jmpbuf = {16844352,
18467472,
5390848,
13627136,
20960179,
16844352,
13076624,
0},
__mask_was_saved = 5390848,
__saved_mask = {
__val = {140737488303264,
13076624,
0,
140737488303472,
140737488303296,
5506081,
0,
140737488303472,
6187899,
0,
2,
0,
6600973,
0,
5506321,
5390848}
}
}}
tem = {
i = 774368
}
save = {
i = 0
}
previous_echo_area_message = {
i = 0
}
also_record = {
i = 0
}
reread = false
gcpro1 = {
next = 0x7fffffff3400,
var = 0x540614 <CAR_SAFE+47>,
nvars = 21474836480
}
gcpro2 = {
next = 0xc78890 <lispsym>,
var = 0x7fffffff33e0,
nvars = 5506081
}
polling_stopped_here = true
orig_kboard = 0xe9ab20
#12 0x0000000000558b68 in read_key_sequence (keybuf=0x7fffffff3b30,
bufsize=30, prompt=..., dont_downcase_last=false,
can_return_switch_frame=true, fix_current_buffer=true,
prevent_redisplay=false) at keyboard.c:9159
interrupted_kboard = 0xe9ab20
interrupted_frame = 0x12d3c50
key = {
i = 140737488304592
}
used_mouse_menu = false
echo_local_start = 0
last_real_key_start = 0
keys_local_start = 0
new_binding = {
i = 5510211
}
count = 2
t = 0
echo_start = 0
keys_start = 0
current_binding = {
i = 17524643
}
first_event = {
i = 0
}
first_unbound = 31
mock_input = 0
fkey = {
parent = {
i = 17364467
},
map = {
i = 17364467
},
start = 0,
end = 0
}
keytran = {
parent = {
i = 13581891
},
map = {
i = 13581891
},
start = 0,
end = 0
}
indec = {
parent = {
i = 17364547
},
map = {
i = 17364547
},
start = 0,
end = 0
}
shift_translated = false
delayed_switch_frame = {
i = 0
}
original_uppercase = {
i = 13076624
}
original_uppercase_position = -1
dummyflag = false
starting_buffer = 0xcfef40
fake_prefixed_keys = {
i = 0
}
gcpro1 = {
next = 0x0,
var = 0x54a6a4 <safe_run_hook_funcall+93>,
nvars = 26832
}
#13 0x0000000000548d11 in command_loop_1 () at keyboard.c:1407
cmd = {
i = 140737488305264
}
keybuf = {{
i = 0
},
{
i = 4274848
},
{
i = 13076624
},
{
i = 0
},
{
i = 0
},
{
i = 140737488305008
},
{
i = 5506081
},
{
i = 0
},
{
i = 140737488305184
},
{
i = 6187899
},
{
i = 16933475
},
{
i = 2
},
{
i = 0
},
{
i = 12914144
},
{
i = 8354000
},
{
i = 0
},
{
i = 16933475
},
{
i = 13104320
},
{
i = 10674493
},
{
i = 21808368
},
{
i = 140737488305184
},
{
i = 6186898
},
{
i = 3
},
{
i = 140737488305152
},
{
i = 27696
},
{
i = 27696
},
{
i = 0
},
{
i = 13104320
},
{
i = 4274848
},
{
i = 0
}}
i = 0
prev_modiff = 0
prev_buffer = 0x0
already_adjusted = false
#14 0x00000000005e229a in internal_condition_case (
bfun=0x5488f2 <command_loop_1>, handlers=..., hfun=0x5480d7 <cmd_error>)
at eval.c:1348
val = {
i = 16933475
}
c = 0xe6b410
#15 0x00000000005485fa in command_loop_2 (ignore=...) at keyboard.c:1139
val = {
i = 15119072
}
#16 0x00000000005e1a2d in internal_catch (tag=...,
func=0x5485d1 <command_loop_2>, arg=...) at eval.c:1108
val = {
i = 0
}
c = 0xe6b2e0
#17 0x000000000054859a in command_loop () at keyboard.c:1118
No locals.
#18 0x0000000000547cb2 in recursive_edit_1 () at keyboard.c:728
count = 1
val = {
i = 140737488305616
}
#19 0x0000000000547e3c in Frecursive_edit () at keyboard.c:799
count = 0
buffer = {
i = 0
}
#20 0x0000000000545c0f in main (argc=2, argv=0x7fffffff3ff8) at emacs.c:1626
dummy = {
i = 80
}
stack_bottom_variable = 0 '\000'
do_initial_setlocale = true
dumping = false
skip_args = 0
rlim = {
rlim_cur = 33554432,
rlim_max = 18446744073709551615
}
no_loadup = false
junk = 0x0
dname_arg = 0x0
ch_to_dir = 0x0
original_pwd = 0x0
A debugging session is active.
Inferior 1 [process 3610] will be killed.
Quit anyway? (y or n)