Question

My Malloc is failing in my project.
Malloc runs several times via a one of the functions but fails due to lack of memory.

I am trying to increase the heap size in my VC++ but it gives me the error as above in the subject.

Can someone please tell me what is wrong in this ?

Windows server 2003 R2 Enterprise edition
And i am using VC++ 98 edition.

I tried some search but could not get anything conclusive on how to use /HEAP OPTION.
should the numbers be in MB ?

message_t* Allocate_momory(MsgType_t msgType, UInt16 dataLength)
{
    // TO DO: Allocate memenory and return the pointer
    message_t* mes_t;
    mes_t = (message_t*) malloc(sizeof (message_t));
    mes_t->msgType = msgType;
    mes_t->dataLength = 0;
    mes_t->clientID = 0;
    mes_t->usageCount = 0;
    mes_t->dataBuf = malloc(sizeof (dataLength));
    return mes_t;
}

Yes it worked… But it unfortunatly did not solve my problem with malloc 🙁 !!
This is a huge project with too many files.
I can’t post the code but can someone guide me how should i try to debug a problem where malloc is failing ?

Answer 1

/HEAP sets the heap size in bytes. Also the square brackets in the documentation denote an optional parameter – you don’t actually type these in. So it would be e.g.

/HEAP:1073741824

for a 1 GB heap, or

/HEAP:1073741824,16777216

if you really do want to specify the “commit” parameter in addition to the heap size (you probably don’t).

Unfortunately I don’t think this will solve your real problem, which is that you are running out of memory. You may have memory leaks, which you can track down with a tool such as valgrind. If that’s not the case then you have a bad design, which will be a lot harder to fix than memory leaks.