Access violation calling ippsExp_64fc_A53 in IPP 2018.0.124

[Keith_W_]

I am getting an access violation when calling ippsExp_64fc_A53 in IPP 2018.0.124

Code to reproduce:

Ipp64fc* b1{ ippsMalloc_64fc(1025) };
Ipp64fc* b2{ ippsMalloc_64fc(1025) };

for (int i = 0; i < 1025; i++)
{
	b1.re = 1;
	b1.im = 0;
}

ippsExp_64fc_A53(b1, b2, 1025);

ippsFree(b1);
ippsFree(b2);

My machine specs:

OS: Windows 10 Professional
IPP version: 2018.0.124
Processor: Intel Core i7-4790
Memory: 32 GB RAM
IDE: Visual Studio 2017 (debug build 64-bits)

The fix is to use ippsExp_64fc_A50 which works.

[Keith_W_]

I should add that this only occurs when I enable gflags to catch memory issues:

gflags /p /enable app.exe /full

[Jonghak_K_Intel]

Hi Keith,

 Can you provide a screenshot of the access violation message and some information about how gflags detects the memory issues and how it affects the working process?

thank you

[Keith_W_]

You can learn more about gflags here (it is part of the Microsoft Windows SDK for detecting memory leaks and buffer overruns):

https://docs.microsoft.com/en-us/windows-hardware/drivers/debugger/gflags

Screen shot of the error:

https://imgur.com/a/yKTNB

Replacing ippsExp_64fc_A53 with ippsExp_64fc_A50 resolves the problem.

[Jonghak_K_Intel]

Thanks for the information.

The issue has been escalated to the engineering to root cause.

We need some time to see what actually happens when gflags gets enabled.

Will get back to you as soon as possible.

Thank you.