interview question# Unix - 噫吁兮，危乎高哉
x*e
1 楼
1. when will core dump occur?
2. what can you get from core? and how to get it?
Any reference book? Thanks.
2. what can you get from core? and how to get it?
Any reference book? Thanks.
y*y
2 楼
在精华区里找找，我看到过的。
【在 x****e 的大作中提到】
: 1. when will core dump occur?
: 2. what can you get from core? and how to get it?
: Any reference book? Thanks.
【在 x****e 的大作中提到】
: 1. when will core dump occur?
: 2. what can you get from core? and how to get it?
: Any reference book? Thanks.
n*g
3 楼
gdb -c core *.ou
【在 x****e 的大作中提到】
: 1. when will core dump occur?
: 2. what can you get from core? and how to get it?
: Any reference book? Thanks.
【在 x****e 的大作中提到】
: 1. when will core dump occur?
: 2. what can you get from core? and how to get it?
: Any reference book? Thanks.
c*z
4 楼
core dumped when process receive signal 9 or bus error
u can know the where the program break and the variable
value
by use gdb or ddd.
【在 y***y 的大作中提到】
: 在精华区里找找，我看到过的。
s*g
5 楼
When you access an address beyond your own, i.e.
write other programs' memory, a core dump occurs
and the OS kill your program.
It usually happen when you use pointer in C. For
example:
main()
{
int *p;
*p = 1000;
printf("%d\n", p);
}
You forget to use malloc/new to allocate memory,
right?
If you compile program by adding -g, say,
$> gcc -g sample.c
Then you can trace the core dump happens in which
line, by using gdb.
$> gdb a.out core
When you are in gdb, use command "bt" or "backtrace"
t
【在 c*****z 的大作中提到】
:
: core dumped when process receive signal 9 or bus error
: u can know the where the program break and the variable
: value
: by use gdb or ddd.
write other programs' memory, a core dump occurs
and the OS kill your program.
It usually happen when you use pointer in C. For
example:
main()
{
int *p;
*p = 1000;
printf("%d\n", p);
}
You forget to use malloc/new to allocate memory,
right?
If you compile program by adding -g, say,
$> gcc -g sample.c
Then you can trace the core dump happens in which
line, by using gdb.
$> gdb a.out core
When you are in gdb, use command "bt" or "backtrace"
t
【在 c*****z 的大作中提到】
:
: core dumped when process receive signal 9 or bus error
: u can know the where the program break and the variable
: value
: by use gdb or ddd.
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