delete导致字符数组崩溃 [英] delete causes crash with character arrays
问题描述
GNU g ++ 3.3.3，Cygwin
//东西
静态字符* mbuffer = NULL;
//东西
void doit（）
{
//东西
mbuffer = new（nothrow）char [1001];
断言（mbuffer！= NULL）;
//东西
断言（mbuffer！= NULL）;
delete [] mbuffer; //有时在这里崩溃（并不总是）。
mbuffer = NULL;
//东西
}
如何检测导致坠机的原因？
-
Alex Vinokur
电子邮件：alex DOT vinokur AT gmail DOT com
http： //mathforum.org/library/view/10978.html
http ：//sourceforge.net/users/alexvn
GNU g++ 3.3.3, Cygwin
// Stuff
static char* mbuffer = NULL;
// Stuff
void doit()
{
// Stuff
mbuffer = new (nothrow) char [1001];
assert (mbuffer != NULL);
// Stuff
assert (mbuffer != NULL);
delete[] mbuffer; // Sometimes crashed here (not always).
mbuffer = NULL;
// Stuff
}
How can one detect what causes the crash?
--
Alex Vinokur
email: alex DOT vinokur AT gmail DOT com
http://mathforum.org/library/view/10978.html
http://sourceforge.net/users/alexvn
推荐答案
Alex Vinokur写道：
Alex Vinokur wrote:
//东西
mbuffer = new（nothrow）char [1001];
断言（mbuffer！= NULL）;
什么是nothrow？
delete [] mbuffer; //有时在这里崩溃（并非总是如此）。
mbuffer = NULL;
// Stuff
mbuffer = new (nothrow) char [1001];
assert (mbuffer != NULL);
What is nothrow?
delete[] mbuffer; // Sometimes crashed here (not always).
mbuffer = NULL;
看起来你正在删除由place new分配的内存
" normal"删除。这是非法的IIRC。您必须定义自己的
" placement delete"功能。
-
问候，
马蒂亚斯
It looks like you''re deleting memory allocated by placement new with a
"normal" delete. This is illegal IIRC. You will have to define your own
"placement delete" function.
--
Regards,
Matthias
" Matthias" <无**** @ digitalraid.com>在消息新闻中写道：cu ************* @ news.t-online.com ...
"Matthias" <no****@digitalraid.com> wrote in message news:cu*************@news.t-online.com...
Alex Vinokur写道：
Alex Vinokur wrote:
// Stuff
------------------------------------------- ------ mbuffer = new（nothrow）char [1001]
//程序在''delete [] mbuffer''下面的行崩溃（而不是行以上）
mbuffer =新字符[1001];
----------------------- -------------------------- assert（mbuffer！= NULL）;
// Stuff ------------------------------------------------- mbuffer = new (nothrow) char [1001]
// The program crashes at ''delete[] mbuffer'' with the line below (instead of line above) too
mbuffer = new char [1001];
------------------------------------------------- assert (mbuffer != NULL);
什么是nothrow？
What is nothrow?
delete [] mbuffer; //有时在这里崩溃（并非总是如此）。
mbuffer = NULL;
delete[] mbuffer; // Sometimes crashed here (not always).
mbuffer = NULL;
看起来你正在删除由新的
分隔的内存分配的内存;正常"删除。这是非法的IIRC。您必须定义自己的
展示位置删除功能。
-
问候，
Matthias
It looks like you''re deleting memory allocated by placement new with a
"normal" delete. This is illegal IIRC. You will have to define your own
"placement delete" function.
--
Regards,
Matthias
-
Alex Vinokur
电子邮件：alex DOT vinokur AT gmail DOT com
http://mathforum.org/library/view/10978.html
http://sourceforge.net/users/alexvn
--
Alex Vinokur
email: alex DOT vinokur AT gmail DOT com
http://mathforum.org/library/view/10978.html
http://sourceforge.net/users/alexvn
" Matthias" <无**** @ digitalraid.com>在消息新闻中写道：cu ************* @ news.t-online.com ...
"Matthias" <no****@digitalraid.com> wrote in message news:cu*************@news.t-online.com...
Alex Vinokur写道：
Alex Vinokur wrote:
//东西
mbuffer = new（nothrow）char [1001];
断言（mbuffer！= NULL）;
// Stuff
mbuffer = new (nothrow) char [1001];
assert (mbuffer != NULL);
什么是nothrow？
What is nothrow?
< QUOTE来自 http://groups-beta.google.com/group/...565d1c77795e52 >
如果你想要''新''要返回NULL而不是抛出异常，请使用
int * p = new（nothrow）int [array_size];
< /报价>
[snip]
-
Alex Vinokur
电子邮件：alex DOT vinokur AT gmail DOT com
http://mathforum.org/library/ view / 10978.html
http://sourceforge.net/users/alexvn
<QUOTE from http://groups-beta.google.com/group/...565d1c77795e52 >
If you want ''new'' to return NULL instead of throwing an exception, use
int* p = new (nothrow) int[array_size];
</QUOTE>
[snip]
--
Alex Vinokur
email: alex DOT vinokur AT gmail DOT com
http://mathforum.org/library/view/10978.html
http://sourceforge.net/users/alexvn
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