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If I understand your question correctly then a good starting point would be

man hier

From my reading of the man page for core, the process should be dumping the mmap()'d data, as that's a "file-backed shared mapping". IIRC, POSIX shared memory is implemented as a mmap()'d file. ...

Core dump occur as default action of a few signals. The list is available with "man -s7 signal" on RedHat. You could install a signal handler to catch all those signals. It could then display...

Which OS and version you are using? I assume Linux since you mention gdb

The /proc/PID/coredump_filter file, available since Linux kernel 2.6.23 can be used to control which memory segments...

Your code crashes because you are passing the address that "name" is pointing to
which is null.

So what you must do is pass the address of name as

int ConvertIDToName(void *id, void *&name,...

Why is it 'void' in the first place? Make it a char **, and no typecasting is necessary.

CS and DS do not need a type member. Whenever CS and DS are being used directly, the code using them already knows what they are. Only ignorant code inspecting the union needs access to a type flag....

Did you try the code or just consider it to look wrong...? Why?

The whole point of using a union, and the whole point of adding type to the beginning of your CS and DS structures, was that they'd...

Modifying the myfunc function changing data->type inplace of s->type


void myfunc(S *data)
{
switch(data->type) {
case TYPE_DS:
data->ds.dc=0;
...

Yes, a union is useful in this situation. Specifically:

enum { TYPE_CS, TYPE_DS };

typedef struct CS {
int type;
int cc;
} CS;

typedef struct DS {
int type;
...

What operating system are you using and on what architecture?

Force a core dump - then examine the core with a debugger like gdb. If the process is hung it is not working, killing it nicely or killing to force a core dump are both acceptable.

If you had posted a complete yet minimal, compilable program which reproduces the issue, it is likely that this thread would have been resolved long ago.

Regards,
Alister

---------- Post...

There's something goofy in your program so post it here so others can look at it...as the max value of ULL "18446744073709551615" is way bigger than "5368709120" so im not sure how you are getting...

What platform are you on...OS/hardware 32 or 64 bits? and insert the statement below into your source...compile it run it and post its output here...
printf("sizeof ULL is %d bytes\n",...

Check the return value from strtoull...it is better not to assume anything and make sure to include <stdlib.h> header file wherein strtoull is declared and post the entire code if it aint too big...

Show us the code you used to determine that the value stored in num is 1073741824 rather than 5368709120! Decimal 5368709120 is hexadecimal 0x140000000 and decimal 1073741824 is 0x40000000. So,...

MY this looks familiar: C function "strtoull" failing (http://cboard.cprogramming.com/c-programming/159459-c-function-strtoull-failing.html)

You are doing yourself and the people who help you a...

Ok. Yes seems to be memory leak case.
But then what is the trigger or is it always expanding in every run?

If you know the trigger which is causing the issue, you would easily zero in on to the...

How do you know the leak is happening?
Does your process crashes everytime it's run after certain time or is there a trigger which results into a crash/abort for "ENOMEM" ??

That means you cannot store an empty string in your array though -- it will be the same as NULL, i.e. first character holding a zero.

You made it an array of arrays, guaranteeing it will never be NULL. array[j] just calculates array + (j*50), which isn't going to be zero.

If you want to store a null pointer, you'll have to...

Google is your friend here, and there is a lot about it...

A starter:-

Device mapper - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Device_mapper)

If you are doing simple or poll()/select() driven synchronous blocking I/O, all the errno get the same treatment with different messages.
If you do fcntl O_NONBLOCK (O_NDELAY looks like an old...

I'm sure it was just a momentary lapse, but to avoid confusing anyone: assigning -1 is a boolean true.

Regards,
Alister