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我得到一些C代碼段錯誤，我無法弄清楚如何看這個，所以我可以找出問題..排除分段錯誤
沒有人有任何的技術，可以幫助我嗎？有什麼東西會跳出來嗎？
下面是GDB輸出：
GNU gdb 6.8 for GNAT Pro 6.2.1 (20090115) [rev:143235] Copyright (C) 2008 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. See your support agreement for details of warranty and support. If you do not have a current support agreement, then there is absolutely no warranty for this version of GDB. Type "show copying" and "show warranty" for details. This GDB was configured as "sparc-sun-solaris2.8"... Reading symbols from /usr/lib/libsocket.so.1...done. Loaded symbols for /usr/lib/libsocket.so.1 Reading symbols from /usr/lib/libnsl.so.1...done. Loaded symbols for /usr/lib/libnsl.so.1 Reading symbols from /usr/lib/libgen.so.1...done. Loaded symbols for /usr/lib/libgen.so.1 Reading symbols from /usr/lib/libintl.so.1... warning: Lowest section in /usr/lib/libintl.so.1 is .dynamic at 00000074 done. Loaded symbols for /usr/lib/libintl.so.1 Reading symbols from /usr/lib/libw.so.1... warning: Lowest section in /usr/lib/libw.so.1 is .dynamic at 00000074 done. Loaded symbols for /usr/lib/libw.so.1 Reading symbols from /usr/lib/libm.so.1...done. Loaded symbols for /usr/lib/libm.so.1 Reading symbols from /temp/gnat/Omnyx/Services/ABPUimLegacy/buildSunOS/lib/libabpuimlegacyC.so...done. Loaded symbols for /temp/gnat/Omnyx/Services/ABPUimLegacy/buildSunOS/lib/libabpuimlegacyC.so Reading symbols from /usr/openwin/lib/libXext.so.0...done. Loaded symbols for /usr/openwin/lib/libXext.so.0 Reading symbols from /usr/openwin/lib/libX11.so.4...done. Loaded symbols for /usr/openwin/lib/libX11.so.4 Reading symbols from /usr/openwin/lib/libXmu.so.4...done. Loaded symbols for /usr/openwin/lib/libXmu.so.4 Reading symbols from /usr/openwin/lib/libXt.so.4...done. Loaded symbols for /usr/openwin/lib/libXt.so.4 Reading symbols from /usr/dt/lib/libXm.so.3...done. Loaded symbols for /usr/dt/lib/libXm.so.3 Reading symbols from /usr/lib/libc.so.1...done. Loaded symbols for /usr/lib/libc.so.1 Reading symbols from /temp/gnat/Omnyx/Services/ABPCommonLegacy/buildSunOS/lib/libabpcommonlegacy.so...done. Loaded symbols for /temp/gnat/Omnyx/Services/ABPCommonLegacy/buildSunOS/lib/libabpcommonlegacy.so Reading symbols from /temp/gnat/Omnyx/Services/ABPCommonLegacy/buildSunOS/lib/libabpcommonlegacyC.so...done. Loaded symbols for /temp/gnat/Omnyx/Services/ABPCommonLegacy/buildSunOS/lib/libabpcommonlegacyC.so Reading symbols from /app/gnatpro6.2.1/lib/gcc/sparc-sun-solaris2.8/4.3.3/rts-native/adalib/libgnarl-6.2.so...done. Loaded symbols for /adapts/ad/irad-c2/tools/SunOS/gnatpro6.2.1/lib/gcc/sparc-sun-solaris2.8/4.3.3/adalib/libgnarl-6.2.so Reading symbols from /app/gnatpro6.2.1/lib/gcc/sparc-sun-solaris2.8/4.3.3/rts-native/adalib/libgnat-6.2.so...done. Loaded symbols for /adapts/ad/irad-c2/tools/SunOS/gnatpro6.2.1/lib/gcc/sparc-sun-solaris2.8/4.3.3/adalib/libgnat-6.2.so Reading symbols from /usr/lib/libpthread.so.1... warning: Lowest section in /usr/lib/libpthread.so.1 is .dynamic at 00000074 done. Loaded symbols for /usr/lib/libpthread.so.1 Reading symbols from /usr/lib/librt.so.1...done. Loaded symbols for /usr/lib/librt.so.1 Reading symbols from /app/gnatpro6.2.1/lib/libstdc++.so.6...done. Loaded symbols for /adapts/ad/irad-c2/tools/SunOS/gnatpro6.2.1/lib/libstdc++.so.6 Reading symbols from /app/gnatpro6.2.1/lib/libgcc_s.so.1...done. Loaded symbols for /adapts/ad/irad-c2/tools/SunOS/gnatpro6.2.1/lib/libgcc_s.so.1 Reading symbols from /usr/lib/libthread.so.1... warning: Lowest section in /usr/lib/libthread.so.1 is .dynamic at 00000074 done. Loaded symbols for /usr/lib/libthread.so.1 Reading symbols from /usr/lib/libaio.so.1...done. Loaded symbols for /usr/lib/libaio.so.1 Reading symbols from /usr/lib/libmd.so.1...done. Loaded symbols for /usr/lib/libmd.so.1 Reading symbols from /usr/lib/libm.so.2...done. Loaded symbols for /usr/lib/libm.so.2 Reading symbols from /platform/sun4v/lib/libc_psr.so.1...done. Loaded symbols for /platform/SUNW,Sun-Fire-T200/lib/libc_psr.so.1 Reading symbols from /lib/ld.so.1...done. Loaded symbols for /lib/ld.so.1 Core was generated by `./buildSunOS/apsui -aps_instance 1006 -aps_ato 0 -reject_menu_tearoff -aps_ipc_'. Program terminated with signal 11, Segmentation fault. [New process 75224 ] #0 0x7f1e4d00 in _XmGetFocusData() from /usr/dt/lib/libXm.so.3
下面是GDB回溯充分顯示出：
(gdb) bt full
#0 0x7f1e4d00 in _XmGetFocusData() from /usr/dt/lib/libXm.so.3
No symbol table info available.
#1 0x7f1e2768 in _XmNavigInitialize() from /usr/dt/lib/libXm.so.3
No symbol table info available.
#2 0x7f1e8adc in Initialize() from /usr/dt/lib/libXm.so.3
No symbol table info available.
#3 0x7f357760 in CallInitialize() from /usr/openwin/lib/libXt.so.4
No symbol table info available.
#4 0x7f3576b4 in CallInitialize() from /usr/openwin/lib/libXt.so.4
No symbol table info available.
#5 0x7f3576b4 in CallInitialize() from /usr/openwin/lib/libXt.so.4
No symbol table info available.
#6 0x7f353804 in xtCreate() from /usr/openwin/lib/libXt.so.4
No symbol table info available.
#7 0x7f35bf0c in _XtCreateWidget() from /usr/openwin/lib/libXt.so.4
No symbol table info available.
#8 0x7f35bc8c in XtCreateWidget() from /usr/openwin/lib/libXt.so.4
No symbol table info available.
#9 0x7f6026f8 in uicr_xmcreate_window (win=0xd3bc0)
at /temp/gnat/Omnyx/Services/ABPUimLegacy/src/uim/create/uicr_xmcreate_window.c:180
n_args = 0
args = {{name = 0x0, value = 0} }
err_msg = '\0' , "ÿ¿Ïä", '\0' , "REVIEW PRIME MANAGEMENT MERGE IMPORT SETUP PLANNING PLAN_SETUP PLAN_PARAMS FROB ATO_APPROVAL ATO_TRICKLE AIRLIFTmain_window_menu\000T_CMD MARITIME_TGT_CMD TEST \000K1\177}al\000\000\000\004\000\000\000\001\000\000\000\000"...
shell = (Widget) 0xd50b8
object_width = 0
object_height = 1660944384
window_name = "TBM_PrimaryWin\000ä\000\000\000\000\177ÿÿø\177ÿü\000\177\023\222¤\000\000 \000\000\f\215ð\000\f\217 \177\023\222¬\177ÿü\000\000\000\000\000ÿ¿Î\200\177\005f,\000\000\000\000\177\023Vx\000\fO \000\aÀ\020\000\fO \1772*\000ui_ipc_xref."
icon_pixmap = 8332422
obj = (gen_obj_list_t *) 0x6b0
vis = (vis_list_t *) 0x7f832bb8
toolbar = (toolbar_t *) 0x0
#10 0x7f5f524c in uicr_create_window (in_buff=0x19750 "main_window_menu")
at /temp/gnat/Omnyx/Services/ABPUimLegacy/src/uim/create/uicr_create_window.c:431
func_name = "uicr_create_window"
str = "\000\000\000\000\000\000\000\000¿¿Ä6'yC \000\000\000\000\000\000\000\000\177\235p0\000\000\000\000\000\003eÈ\000\003e¸\000\000\000\004ÿÿ\000\000\000\000\000\000ÿÿÿß\000\000\000\017\000\000\000\017\000\003^\200ÿ¿Ô\000\000\000\000\000\000\000\000\001\000\000\000\004\000\000\000\017ÿ¿Ó \177\2133, "\001\000\000\000\234\000\000\000\000\000\000\000\036\000\000\000\000\000\rP\000ÿ¿Ô \177\213\022\020\000"...
ptr = 0x19760 ""
keyword = 0x8a130 ""
window_name = 0x8a130 ""
---Type to continue, or q to quit---
title_name = "\000¿ÒØ\177\211îÄ\000\000\000\000\000\000\000\004", '\0' , "\003e¸\000\000\000\004ÿÿ\000\000\000\000\000\000ÿÿÿß\000\000\000\017\000\000\000 \000\001\023T\177¿sÈ\177·\fà\005øص\000\000\[email protected]\177·\020Xÿ¿Ó8"
full_title_name = 0x2b870 "TAP"
object_width = 2141025804
object_height = 1
window_width = 0
window_height = 0
first_object = 1
other_obj = 0
centered_max_width = 18866798
下面是dbx的輸出：
For information about new features see `help changes'
To remove this message, put `dbxenv suppress_startup_message 7.7' in your .dbxrc
Reading apsui
core file header read successfully
Reading ld.so.1
Reading libsocket.so.1
Reading libnsl.so.1
Reading libgen.so.1
Reading libintl.so.1
Reading libw.so.1
Reading libm.so.1
Reading librt.so.1
Reading libabpuimlegacyC.so
Reading libXext.so.0
Reading libX11.so.4
Reading libXmu.so.4
Reading libXt.so.4
Reading libXm.so.3
Reading libabpcommonlegacy.so
Reading libabpcommonlegacyC.so
Reading libgnarl-6.2.so
Reading libgnat-6.2.so
Reading libpthread.so.1
Reading libc.so.1
Reading libaio.so.1
Reading libmd.so.1
Reading libstdc++.so.6.0.10
Reading libgcc_s.so.1
Reading libthread.so.1
Reading libm.so.2
Reading libc_psr.so.1
[email protected] ([email protected]) program terminated by signal SEGV (no mapping at the fault address)
0x7f264d00: _XmGetFocusData+0x0098: ld [%o0], %o1
Current function is uicr_xmcreate_window
180 win->main_window = XmCreateMainWindow(shell, win->name, args, n_args);
>check -all
access checking - ON
memuse checking - ON
Running: apsui
(process id 18052)
Reading rtcapihook.so
Reading libdl.so.1
Reading rtcaudit.so
Reading libmapmalloc.so.1
Reading rtcboot.so
Reading librtc.so
RTC: Enabling Error Checking...
RTC: Using UltraSparc trap mechanism
RTC: See `help rtc showmap' and `help rtc limitations' for details.
RTC: Running program...
abpcommonlegacydummy.adb elaborated
User Interface version TOOLKIT : 22 MAR 2010 UIMPID=18052
Read from unallocated (rua) on thread 1:
Attempting to read 4 bytes through NULL pointer
[email protected] ([email protected]) stopped in _XmGetFocusData at 0x5d164d00
0x5d164d00: _XmGetFocusData+0x0098: ld [%o0], %o1
Current function is uicr_xmcreate_window
180 win->main_window = XmCreateMainWindow(shell, win->name, args, n_args);
下面是在過去的函數調用我可以修改的堆棧跟蹤（不在外部庫 - 在uicr_xmcreate_window中）..此類的完整代碼可以是在這裏看到：http://utilitybase.com/paste/26607
void uicr_xmcreate_window(window_t *win)
{
Cardinal n_args;
Arg args[MAX_ARGS];
Widget shell = NULL;
//MORE STUFF HERE
memset(&(args), 0, sizeof(Arg)*MAX_ARGS); n_args = 0;
if (win->attributes != PRIMARY_WINDOW) {
XtSetArg(args[n_args], XmNtopAttachment, XmATTACH_FORM); n_args++;
XtSetArg(args[n_args], XmNbottomAttachment, XmATTACH_FORM); n_args++;
XtSetArg(args[n_args], XmNleftAttachment, XmATTACH_FORM); n_args++;
XtSetArg(args[n_args], XmNrightAttachment, XmATTACH_FORM); n_args++;
XtSetArg(args[n_args], XmNtopOffset, 0); n_args++;
XtSetArg(args[n_args], XmNbottomOffset, 0); n_args++;
XtSetArg(args[n_args], XmNleftOffset, 0); n_args++;
XtSetArg(args[n_args], XmNrightOffset, 0); n_args++;
}
win->main_window = XmCreateMainWindow(shell, win->name, args, n_args);
編輯
我加在gdb斷點的函數調用之前的權利，並打印出一些值（不知道這將幫助 - 我是一個的n00b）：
Breakpoint 1, uicr_xmcreate_window (win=0x9b378)
at /temp/gnat/Omnyx/Services/ABPUimLegacy/src/uim/create/uicr_xmcreate_window.c:179
179 printf("%d",n_args);
(gdb) p *win
$1 = {struct_type = 1045, next = 0x0, hash_name = 971,
name = 0x994e8 "error_log", widget = 0x0, main_window = 0x0, workarea = 0x0,
menu_bar = 0x0, message_window = 0x0, window_RC = 0x0, working_box = 0,
working_identifier = 0x0, has_message_area = 0, pos = {x = 0, y = 0},
illegal_char_set = 0x0, height = 0, width = 0, configured = 0,
actions = 0x0, title = 0x99d18, help_text = 0x0, groups = 0x0,
scroll_bars = 0x0, write_protect = 0, attributes = 0, initial_focus = {
obj_type = 0, obj_name = 0x0, area = 0x0}, text_edit = {
text_selected_widget = 0x0, text_focus_widget = 0x0, updated_widget = 0x0,
start = 0, end = 0, updated_text = 0x0, last_operation = 0},
close_rqt = 0x0, kill_application_action_list_name = 0x0, parent = 0x0,
gen_objs = 0x99da0, panes = 0x0, table_list = 0x0, selected_table = 0x0,
dialogs = 0x0, has_been_loaded = 0 '\0', source_file_name = 0x0}
(gdb) p *shell
$2 = {core = {self = 0x9db50, widget_class = 0xfec7897c, parent = 0x0,
xrm_name = 466, being_destroyed = 0 '\0', destroy_callbacks = 0x9ae58,
constraints = 0x0, x = 0, y = 0, width = 0, height = 0, border_width = 1,
managed = 0 '\0', sensitive = 1 '\001', ancestor_sensitive = 1 '\001',
event_table = 0x9ad98, tm = {translations = 0x0, proc_table = 0x0,
current_state = 0x0, lastEventTime = 0}, accelerators = 0x0,
border_pixel = 0, border_pixmap = 2, popup_list = 0x0, num_popups = 0,
name = 0x7776e "TBM_Dialog_Fixed", screen = 0x7a7e0, colormap = 32,
window = 0, depth = 24, background_pixel = 12825262,
background_pixmap = 2, visible = 1 '\001', mapped_when_managed = 1 '\001'}}
(gdb) p *args
$3 = {name = 0x0, value = 0}
(gdb) p *n_args
Cannot access memory at address 0x0
(gdb) p n_args
$4 = 0
(gdb) p args
$5 = {{name = 0x0, value = 0} <repeats 20 times>}
那麼是什麼'n_args'初始化爲？ – GManNickG 2010-02-19 04:48:53
'shell'獲得的值不是'NULL'嗎？ – 2010-02-19 04:49:42
對不起，錯過了GDB的一部分。你能從GDB內打印回溯嗎？這應該給你變量和它們的值。在地址中尋找零（null）或其他奇怪的東西。 – Anycorn 2010-02-19 05:02:36