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Re: Emacs 23.0.60 build problem on CANNOT_DUMP platform GNUstep
|
From: |
Chris |
|
Subject: |
Re: Emacs 23.0.60 build problem on CANNOT_DUMP platform GNUstep |
|
Date: |
Thu, 31 Jan 2008 02:55:50 -1000 |
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User-agent: |
GNUMail (Version 1.2.0) |
I think I just discovered a bit more info concerning the optimizations
mentioned by YAMAMOTO Mitsuharu.
Somewhere in this part of xfaces.c:
6696 CHECK_LIVE_FRAME (frame);
6697 f = XFRAME (frame);
6698
6699 for (i = 0; i < LFACE_VECTOR_SIZE; i++)
6700 attrs[i] = Qunspecified;
6701 merge_face_ref (f, attributes, attrs, 1, 0);
According to the gdb output below (I had to re-compile with -gstabs+
for 'f' to even print on my machine),
when we get to the breakpoint at 6696, 'f' seems -- to my uneducated
eye -- to already contain a value valid enough that gdb goes ahead and
prints it. But I'm pretty sure its garbage.
When I issue 'step' to gdb, it doesn't stop at 6697, but at 6699
instead, and 'f' still seems to contain the exact same address.
But when I set a breakpoint at 6701 -- the first statement after the
loop -- and continue to it, 'f' now contains 0x12.
Then, if I step into merge_face_ref and 'p f', it has a 3rd distinct
value.
After returning from merge_face_ref, 'p f' displays a *4th* value.
Especially interesting to me is that the 3rd value is the only that
looks like it is actually valid, since the struct members
'output_method', 'desired_cursor' and 'blink_off_cursor' have been
filled in with names by gdb.
==================================================
Starting program:
/home/cjh/GNUstep/Build/emacs-23.0.0_NS-9.0rc3/nextstep/build/Emacs.app/Emacs
-geometry 80x40+0+0
[Thread debugging using libthread_db enabled]
[New Thread -1222360960 (LWP 31645)]
[Switching to Thread -1222360960 (LWP 31645)]
Breakpoint 4, Fdisplay_supports_face_attributes_p
(attributes=140907877, display=139122972)
at xfaces.c:6696
6696 CHECK_LIVE_FRAME (frame);
(gdb) l 6690,6710
6690 XFRAME
(frame)->param_alist)),
6691 display)))
6692 break;
6693 }
6694 }
6695
6696 CHECK_LIVE_FRAME (frame);
6697 f = XFRAME (frame);
6698
6699 for (i = 0; i < LFACE_VECTOR_SIZE; i++)
6700 attrs[i] = Qunspecified;
6701 merge_face_ref (f, attributes, attrs, 1, 0);
6702
6703 def_face = FACE_FROM_ID (f, DEFAULT_FACE_ID);
6704 if (def_face == NULL)
6705 {
6706 if (! realize_basic_faces (f))
6707 error ("Cannot realize default face");
6708 def_face = FACE_FROM_ID (f, DEFAULT_FACE_ID);
6709 if (def_face == NULL)
6710 abort (); /* realize_basic_faces must have set it up
*/
(gdb) p frame
$14 = 139122972
(gdb) pr
#<frame F1 0x84ad918>
(gdb) p f
$15 = (struct frame *) 0x83ecb5c
(gdb) p *f
$16 = {
size = 138653505,
next = 0x8498791,
name = 139036969,
icon_name = 138653505,
title = 140457937,
focus_frame = 140460833,
root_window = 138653505,
selected_window = 140460401,
minibuffer_window = 140460857,
param_alist = 140541507,
scroll_bars = 140541475,
condemned_scroll_bars = 140541523,
menu_bar_items = 140541491,
face_alist = 140541539,
menu_bar_vector = 138653505,
buffer_predicate = 138653505,
buffer_list = 138653505,
buried_buffer_list = 140438665,
menu_bar_window = 138653505,
tool_bar_window = 139049481,
tool_bar_items = 140438689,
desired_tool_bar_string = 140438737,
current_tool_bar_string = 139054465,
face_cache = 0x843af41,
menu_bar_items_used = 140424417,
namebuf = 0x85eb3f1 "",
current_pool = 0x85eed01,
desired_pool = 0x85eb3c1,
desired_matrix = 0x85eb4c9,
current_matrix = 0x85eece9,
glyphs_initialized_p = 1,
resized_p = 0,
force_flush_display_p = 0,
default_face_done_p = 1,
already_hscrolled_p = 1,
updated_p = 1,
minimize_tool_bar_window_p = 0,
external_tool_bar = 138653505,
tool_bar_lines = 138653505,
n_tool_bar_rows = 139049505,
n_tool_bar_items = -1078695456,
decode_mode_spec_buffer = 0x85eb1f9 "",
insert_line_cost = 0x843af41,
delete_line_cost = 0x85eb199,
insert_n_lines_cost = 0x843af41,
delete_n_lines_cost = 0x843af41,
text_lines = 8,
text_cols = 140423793,
total_lines = 1000,
total_cols = 138653505,
new_text_lines = -1078695424,
new_text_cols = 140423553,
left_pos = 140423625,
top_pos = -1078701088,
pixel_height = 0,
pixel_width = 140424057,
resx = 2.3241811535839589e-268,
resy = 2.3241534258806793e-268,
x_pixels_diff = 138653505,
y_pixels_diff = 140423649,
win_gravity = 140729112,
size_hint_flags = 140424033,
border_width = 140423697,
internal_border_width = 138653505,
column_width = 100,
space_width = 1,
line_height = 140423601,
output_method = 400,
terminal = 0x0,
output_data = {
tty = 0x864d6b5,
x = 0x864d6b5,
w32 = 0x864d6b5,
mac = 0x864d6b5,
ns = 0x864d6b5,
nothing = 140826293
},
font_driver_list = 0x0,
fringe_cols = 138653505,
left_fringe_width = 138653505,
right_fringe_width = 140423769,
want_fullscreen = -1,
menu_bar_lines = 138653505,
external_menu_bar = 140426577,
display_preempted = -103 '\231',
visible = -67 '\275',
iconified = 94 '^',
async_visible = 8 '\b',
async_iconified = -31 '\341',
garbaged = -74 '\266',
has_minibuffer = 94 '^',
wants_modeline = 8 '\b',
can_have_scroll_bars = 41 ')',
auto_raise = -73 '\267',
auto_lower = 94 '^',
no_split = 8 '\b',
explicit_name = -71 '\271',
window_sizes_changed = -73 '\267',
mouse_moved = 94 '^',
vertical_scroll_bar_type = 140869277,
desired_cursor = 140426817,
cursor_width = 140426769,
blink_off_cursor = 140425169,
blink_off_cursor_width = 140425025,
message_buf = 0x85ebd69 "",
scroll_bottom_vpos = 140425073,
scroll_bottom_vpos = 140425073,
config_scroll_bar_width = 140426793,
config_scroll_bar_cols = 140424953,
scroll_bar_actual_width = 140424905,
cost_calculation_baud_rate = 140426625,
gamma = 6.9380006746658039e-316,
extra_line_spacing = 1,
background_pixel = 140425121,
foreground_pixel = 140426865
}
(gdb) step
6699 for (i = 0; i < LFACE_VECTOR_SIZE; i++)
(gdb) p f
$17 = (struct frame *) 0x83ecb5c
(gdb) break 6701
Note: breakpoint 5 also set at pc 0x811497a.
Breakpoint 6 at 0x811497a: file xfaces.c, line 6701.
(gdb) cont
Continuing.
Breakpoint 5, Fdisplay_supports_face_attributes_p
(attributes=140907877, display=139122972)
at xfaces.c:6701
6701 merge_face_ref (f, attributes, attrs, 1, 0);
(gdb) p f
$18 = (struct frame *) 0x12
(gdb) step
merge_face_ref (f=0x84ad918, face_ref=140907877, to=0xbfb45330,
err_msgs=1, named_merge_points=0x0)
at xfaces.c:3943
3943 int ok = 1; /* Succeed without an error? */
(gdb) p f
$20 = (struct frame *) 0x84ad918
(gdb) p *f
$21 = {
size = 1073742869,
next = 0x84ad628,
name = 139109019,
icon_name = 138653505,
title = 138653505,
focus_frame = 138653505,
root_window = 139123380,
selected_window = 139123380,
minibuffer_window = 139123724,
param_alist = 138653505,
scroll_bars = 138653505,
condemned_scroll_bars = 138653505,
menu_bar_items = 138653505,
face_alist = 140907277,
menu_bar_vector = 138653505,
buffer_predicate = 138653505,
buffer_list = 138641957,
buried_buffer_list = 138653505,
menu_bar_window = 138653505,
tool_bar_window = 138653505,
tool_bar_items = 138653505,
desired_tool_bar_string = 138653505,
current_tool_bar_string = 138653505,
face_cache = 0x0,
menu_bar_items_used = 0,
namebuf = 0x0,
current_pool = 0x8608110,
desired_pool = 0x86080f8,
desired_matrix = 0x8608128,
current_matrix = 0x8608378,
glyphs_initialized_p = 1,
resized_p = 0,
force_flush_display_p = 0,
default_face_done_p = 0,
already_hscrolled_p = 0,
updated_p = 0,
minimize_tool_bar_window_p = 0,
external_tool_bar = 0,
tool_bar_lines = 0,
n_tool_bar_rows = 0,
n_tool_bar_items = 0,
decode_mode_spec_buffer = 0x860c038 "",
insert_line_cost = 0x0,
delete_line_cost = 0x0,
insert_n_lines_cost = 0x0,
delete_n_lines_cost = 0x0,
text_lines = 10,
text_cols = 10,
total_lines = 0,
total_cols = 10,
new_text_lines = 0,
new_text_cols = 0,
left_pos = 0,
top_pos = 0,
pixel_height = 0,
pixel_width = 0,
resx = 0,
resy = 0,
x_pixels_diff = 0,
y_pixels_diff = 0,
win_gravity = 0,
size_hint_flags = 0,
border_width = 0,
internal_border_width = 0,
column_width = 1,
space_width = 0,
line_height = 1,
output_method = output_initial,
terminal = 0x84ad628,
output_data = {
tty = 0x0,
x = 0x0,
w32 = 0x0,
mac = 0x0,
ns = 0x0,
nothing = 0
},
font_driver_list = 0x0,
fringe_cols = 0,
left_fringe_width = 0,
right_fringe_width = 0,
want_fullscreen = 0,
menu_bar_lines = 0,
external_menu_bar = 0,
display_preempted = 0 '\0',
visible = 1 '\001',
iconified = 0 '\0',
async_visible = 1 '\001',
async_iconified = 0 '\0',
garbaged = 1 '\001',
has_minibuffer = 1 '\001',
wants_modeline = 1 '\001',
can_have_scroll_bars = 0 '\0',
auto_raise = 0 '\0',
auto_lower = 0 '\0',
no_split = 0 '\0',
explicit_name = 0 '\0',
window_sizes_changed = 1 '\001',
mouse_moved = 0 '\0',
vertical_scroll_bar_type = vertical_scroll_bar_none,
desired_cursor = FILLED_BOX_CURSOR,
cursor_width = 0,
blink_off_cursor = FILLED_BOX_CURSOR,
blink_off_cursor_width = 0,
message_buf = 0x860c008 "",
scroll_bottom_vpos = 0,
config_scroll_bar_width = 0,
config_scroll_bar_cols = 0,
scroll_bar_actual_width = 0,
cost_calculation_baud_rate = 0,
gamma = 0,
extra_line_spacing = 0,
background_pixel = 4294967293,
foreground_pixel = 4294967294
}
(gdb) cont
Continuing.
Breakpoint 2, Fdisplay_supports_face_attributes_p
(attributes=140907877, display=139122972)
at xfaces.c:6703
6703 def_face = FACE_FROM_ID (f, DEFAULT_FACE_ID);
(gdb) p f
$22 = (struct frame *) 0x1
(gdb) step
Program received signal SIGSEGV, Segmentation fault.
0x081149b4 in Fdisplay_supports_face_attributes_p
(attributes=140907877, display=139122972)
at xfaces.c:6703
6703 def_face = FACE_FROM_ID (f, DEFAULT_FACE_ID);
(gdb)
==================================================
On 2008-01-31 00:45:41 -1000 YAMAMOTO Mitsuharu
<address@hidden> wrote:
On Wed, 30 Jan 2008 09:13:06 -1000, Chris
<address@hidden>
said:
It seems emacs-pretest-bug list is no longer active, so I decided to
send this here.
Bug reports posted to address@hidden are now forwarded to
address@hidden, and it is still the appropriate place to post a
report for the prerelease version.
This was originally sent to the
address@hidden The
folks there helped come up with a workaround/possible solution, and
YAMAMOTO Mitsuharu on that list suggested I send a report to
emacs-pretest-bug.
In short, creation of Vprocess_environment from `environ' in
set_initial_environment (callproc.c) is done without a terminating
Qnil as its initial value on CANNOT_DUMP platforms.
Vprocess_environment is supposed to be initialized to Qnil in
syms_of_callproc, but it is actually called after the creation of
Vprocess_environment on CANNOT_DUMP platforms.
void
set_initial_environment ()
{
register char **envp;
#ifndef CANNOT_DUMP
if (initialized)
#endif
{
for (envp = environ; *envp; envp++)
Vprocess_environment = Fcons (build_string (*envp),
Vprocess_environment);
/* Ideally, the `copy' shouldn't be necessary, but it seems
it's frequent
to use `delete' and friends on process-environment. */
Vinitial_environment = Fcopy_sequence (Vprocess_environment);
}
}
This seems to work -- the build completes normally.
The inserted line is isolated below:
======================================================
#ifndef CANNOT_DUMP
if (initialized)
#endif
{
Vprocess_environment = Qnil;
for (envp = environ; *envp; envp++)
Vprocess_environment = Fcons (build_string (*envp),
======================================================
I just asked the OP to try this workaround in order to recognize the
situation. So it might not be a right solution. Experts on this part
may provide a better one.
Also, even with this workaround, CANNOT_DUMP seems to show further
problems. The following backtrace is from the same author originally
at
http://sourceforge.net/mailarchive/forum.php?thread_name=6e099bf81497c842e230c086b73253c8%40lagorda&forum_name=emacs-app-dev-
====================================================
~/GNUstep/Build/emacs-23.0.0_NS-9.0rc3/src$ gdb
../nextstep/build/Emacs.app/Emacs
GNU gdb 6.3-debian
DISPLAY = :0.0
TERM = linux
Breakpoint 1 at 0x81391f4: file sysdep.c, line 1444.
(gdb) break xfaces.c:6703
Breakpoint 2 at 0x81149ab: file xfaces.c, line 6703.
(gdb) run
Starting program:
/home/cjh/GNUstep/Build/emacs-23.0.0_NS-9.0rc3/nextstep/build/Emacs.app/Emacs
-geometry 80x40+0+0
[Thread debugging using libthread_db enabled]
[New Thread -1223024512 (LWP 30047)]
[Switching to Thread -1223024512 (LWP 30047)]
Breakpoint 2, Fdisplay_supports_face_attributes_p
(attributes=140908901,
display=139122972)
at xfaces.c:6703
6703 def_face = FACE_FROM_ID (f, DEFAULT_FACE_ID);
(gdb) info locals
attributes = 1
display = -1077660624
supports = 1
i = 1
frame = 0
def_face = (struct face *) 0x83ad51c
attrs = {138679945, 138679945, 138679945, 138679945, 138679945,
138679633,
138679945 <repeats 12 times>}
(gdb) p f
$1 = (struct frame *) 0x1
(gdb) cont
Continuing.
Program received signal SIGSEGV, Segmentation fault.
0x081149b4 in Fdisplay_supports_face_attributes_p
(attributes=140908901,
display=139122972)
at xfaces.c:6703
6703 def_face = FACE_FROM_ID (f, DEFAULT_FACE_ID);
(gdb) bt full 3
#0 0x081149b4 in Fdisplay_supports_face_attributes_p
(attributes=140908901,
display=139122972)
at xfaces.c:6703
attributes = 0
display = -1077660624
supports = 0
i = 0
frame = 139122968
def_face = (struct face *) 0x83ad51c
attrs = {138679945, 138679945, 138679945, 138679945, 138679945,
138679633,
138679945 <repeats 12 times>}
#1 0x08197e24 in Ffuncall (nargs=3, args=0xbfc43530) at eval.c:3034
fun = 139122968
original_fun = -1077660624
funcar = -1077660624
numargs = 2
lisp_numargs = 139122968
val = 140908888
backtrace = {
next = 0xbfc43660,
function = 0xbfc43530,
args = 0xbfc43534,
nargs = 2,
evalargs = 0 '\0',
debug_on_exit = 0 '\0'
}
(gdb) bt
#0 0x081149b4 in Fdisplay_supports_face_attributes_p
(attributes=140908901,
display=139122972)
at xfaces.c:6703
#1 0x08197e24 in Ffuncall (nargs=3, args=0xbfac13b0) at eval.c:3034
#2 0x081c4228 in Fbyte_code (bytestr=136865075, vector=136865092,
maxdepth=5) at bytecode.c:679
#3 0x0819826e in funcall_lambda (fun=136865028, nargs=2,
arg_vector=0xbfac1534) at eval.c:3222
#4 0x08197cbd in Ffuncall (nargs=3, args=0xbfac1530) at eval.c:3088
#5 0x081c4228 in Fbyte_code (bytestr=136865331, vector=136865348,
maxdepth=4) at bytecode.c:679
#6 0x0819826e in funcall_lambda (fun=136865276, nargs=2,
arg_vector=0xbfac16a4) at eval.c:3222
#7 0x08197cbd in Ffuncall (nargs=3, args=0xbfac16a0) at eval.c:3088
#8 0x081c4228 in Fbyte_code (bytestr=136865635, vector=136865652,
maxdepth=6) at bytecode.c:679
#9 0x0819826e in funcall_lambda (fun=136865572, nargs=3,
arg_vector=0xbfac1824) at eval.c:3222
#10 0x08197cbd in Ffuncall (nargs=4, args=0xbfac1820) at eval.c:3088
#11 0x081c4228 in Fbyte_code (bytestr=136842019, vector=136842036,
maxdepth=5) at bytecode.c:679
#12 0x0819826e in funcall_lambda (fun=136841948, nargs=5,
arg_vector=0xbfac19a4) at eval.c:3222
#13 0x08197cbd in Ffuncall (nargs=6, args=0xbfac19a0) at eval.c:3088
#14 0x081c4228 in Fbyte_code (bytestr=145632179, vector=145637700,
maxdepth=29) at bytecode.c:679
#15 0x08197068 in Feval (form=140909333) at eval.c:2367
#16 0x081ae8d3 in readevalloop (readcharfun=139121545,
stream=0x8ad4468,
sourcename=145584283,
evalfun=0x8196c60 <Feval>, printflag=0, unibyte=138653505,
readfun=138653505, start=138653505,
end=138653505) at lread.c:1765
#17 0x081ad704 in Fload (file=145584123, noerror=138653505,
nomessage=138653505,
nosuffix=138653505, must_suffix=138653505) at lread.c:1226
#18 0x081970c7 in Feval (form=140869885) at eval.c:2375
#19 0x081ae8d3 in readevalloop (readcharfun=139121545,
stream=0x860c468,
sourcename=140541227,
evalfun=0x8196c60 <Feval>, printflag=0, unibyte=138653505,
readfun=138653505, start=138653505,
end=138653505) at lread.c:1765
#20 0x081ad704 in Fload (file=140541035, noerror=138653505,
nomessage=138653505,
nosuffix=138653505, must_suffix=138653505) at lread.c:1226
#21 0x081970c7 in Feval (form=138637701) at eval.c:2375
#22 0x0811f334 in top_level_2 () at keyboard.c:1410
#23 0x08195b3c in internal_condition_case (bfun=0x811f310
<top_level_2>,
handlers=139036201,
hfun=0x811eee0 <cmd_error>) at eval.c:1497
#24 0x0811f38a in top_level_1 () at keyboard.c:1418
#25 0x08195699 in internal_catch (tag=139031049, func=0x811f340
<top_level_1>, arg=138653505)
at eval.c:1233
#26 0x0811f26a in command_loop () at keyboard.c:1373
#27 0x0811ea97 in recursive_edit_1 () at keyboard.c:989
#28 0x0811ec3f in Frecursive_edit () at keyboard.c:1051
#29 0x0811cb94 in main (argc=3, argv=0xbfac2fa4) at emacs.c:1862
Lisp Backtrace:
"display-supports-face-attributes-p" (0xbfac13b4)
"face-spec-set-match-display" (0xbfac1534)
"face-spec-choose" (0xbfac16a4)
"face-spec-set" (0xbfac1824)
"custom-declare-face" (0xbfac19a4)
"byte-code" (0xbfac1af0)
"load" (0xbfac21d0)
"load" (0xbfac28b0)
(gdb)
=================================================
I could reproduce a similar backtrace with the X11 build of Emacs
23.0.50 on Mac OS X by deliberately defining CANNOT_DUMP. In the
above backtrace, several values might become unreliable because of
optimization. I could get the following output by turning it off.
6235 def_face = FACE_FROM_ID (f, DEFAULT_FACE_ID);
(gdb) info locals
supports = 0
i = 17
frame = 13636396
f = (struct frame *) 0xd01328
def_face = (struct face *) 0x1808b11
attrs = {25201737, 25201737, 25201737, 25201737, 25201737, 25201425,
25201737
<repeats 11 times>}
(gdb) p *f
$2 = {
size = 1073742869, next = 0xd01208, name = 25220731, icon_name =
25165833, title = 25165833, focus_frame = 25165833, root_window =
13636812, selected_window = 13636812, minibuffer_window = 13637180,
param_alist = 25165833, scroll_bars = 25165833,
condemned_scroll_bars =
25165833, menu_bar_items = 25165833, face_alist = 7789661,
menu_bar_vector
= 25165833, buffer_predicate = 25165833, buffer_list = 7629717,
buried_buffer_list = 25165833, menu_bar_window = 25165833,
tool_bar_window
= 25165833, tool_bar_items = 25165833, desired_tool_bar_string =
25165833,
current_tool_bar_string = 25165833, face_cache = 0x0,
menu_bar_items_used =
0, namebuf = 0x0, current_pool = 0xd03d08, desired_pool =
0xd03ce8,
desired_matrix = 0x1839408, current_matrix = 0x1839808,
glyphs_initialized_p = 1, resized_p = 0, force_flush_display_p = 0,
default_face_done_p = 0, already_hscrolled_p = 0, updated_p = 0,
minimize_tool_bar_window_p = 0, tool_bar_lines = 0, n_tool_bar_rows
= 0,
n_tool_bar_items = 0, decode_mode_spec_buffer = 0xd03ea8 "",
insert_line_cost = 0x0, delete_line_cost = 0x0, insert_n_lines_cost
= 0x0,
delete_n_lines_cost = 0x0, text_lines = 10, text_cols = 10,
total_lines =
0, total_cols = 10, new_text_lines = 0, new_text_cols = 0,
left_pos = 0,
top_pos = 0, pixel_height = 0, pixel_width = 0, x_pixels_diff = 0,
y_pixels_diff = 0, win_gravity = 0, size_hint_flags = 0,
border_width = 0,
internal_border_width = 0, column_width = 1, space_width = 0,
line_height
= 1, output_method = output_initial, terminal = 0xd01208,
output_data = {
tty = 0x0, x = 0x0, w32 = 0x0, mac = 0x0, nothing = 0
}, fringe_cols = 0, left_fringe_width = 0, right_fringe_width =
0,
want_fullscreen = 0, menu_bar_lines = 0, external_menu_bar = 0,
display_preempted = 0 '\0', visible = 1 '\001', iconified = 0 '\0',
async_visible = 1 '\001', async_iconified = 0 '\0', garbaged = 1
'\001',
has_minibuffer = 1 '\001', wants_modeline = 1 '\001',
can_have_scroll_bars
= 0 '\0', auto_raise = 0 '\0', auto_lower = 0 '\0', no_split = 0
'\0',
explicit_name = 0 '\0', window_sizes_changed = 1 '\001',
mouse_moved = 0
'\0', vertical_scroll_bar_type = vertical_scroll_bar_none,
desired_cursor =
FILLED_BOX_CURSOR, cursor_width = 0, blink_off_cursor =
FILLED_BOX_CURSOR,
blink_off_cursor_width = 0, message_buf = 0xd03e68 "",
scroll_bottom_vpos =
0, config_scroll_bar_width = 0, config_scroll_bar_cols = 0,
scroll_bar_actual_width = 0, cost_calculation_baud_rate = 0, gamma
= 0,
extra_line_spacing = 0, background_pixel = 4294967293,
foreground_pixel =
4294967294
I guess the CANNOT_DUMP situation has not been fully tested after the
multi-tty merger.
YAMAMOTO Mitsuharu
address@hidden