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Date:	Thu, 07 Mar 2002 12:09:55 +0900
From:	taoism AT mx9 DOT freecom DOT ne DOT jp
To:	cygwin AT cygwin DOT com
Subject:	stackdump about C language
Reply-To:	hongming AT anet DOT ne DOT jp
Message-Id:	<20020307120108.9A9E.TAOISM@mx9.freecom.ne.jp>
MIME-Version:	1.0
X-Mailer:	Becky! ver. 2.00.08

Hi, gentleman, could you do me a favour?
I had some trouble in running a C program.

[C source code is]
-----  from  here ----
#include <stdio.h>

int main() {
  char *a = "I am a teacher";
  char *b = "You are a student";
  printf("string_a = %s\nstring_b = %s\n", a, b);
  copy_string(a, b);
  printf("string_a = %s\nstring_b = %s\n", a, b);
}

int copy_string(char *from, char *to) {
  while((*to++ = *from++) != '\0');
}
-----  end  here ----

[Compilation Tool]
  gcc version 2.95.3-5(cygwin)

[Question]
 The compilation is passed, but after running the a.exe, the
following message appeared and I got a a.exe.stackdump too.
------
string_a = I am a teacher
string_b = You are a student
     0 [main] a 1536 open stackdumpfile:Dumping stack trace to a.exe
stackdump
Segmentation fault (core dumped)
------

[Misc]
 The contents of a.exe.stackdump is the following:
--------
Exception: STATUS_ACCESS_VIOLATION at eip=004010F0
eax=00401049 ebx=00000004 ecx=00401044 edx=00401053 esi=610903E8 edi=00000001
ebp=0240FE84 esp=0240FE84 program=E:\home\Study\C\a.exe
cs=001B ds=0023 es=0023 fs=003B gs=0000 ss=0023
Stack trace:
Frame     Function  Args
0240FE84  004010F0  (00401044, 00401053, 00401053, 0040108F)
0240FEB4  004010C5  (00000001, 1A023684, 0A010008, 00000000)
0240FF10  61003AEA  (00000000, 0247E798, F08ABC4C, 00000001)
0240FF40  61003CBD  (00401084, 0247E798, FD37F440, 00000000)
0240FF60  61003CFC  (00000000, 00000000, FD37F5D0, 00000005)
0240FF90  00401153  (00401084, FFFFFFFF, 80430D77, 00000000)
0240FFC0  0040103D  (0247E798, 00000000, 7FFDF000, 0247FA39)
0240FFF0  77E97D08  (00401000, 00000000, 000000C8, 00000100)
End of stack trace
---------


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