A bug in sanitizer api

Question

A bug in sanitizer api

Closed this issue 6 months ago · 4 comments

Hi,

I found Sanitizer_ResourceMemoryData::flags == 0x6 rather than 0x2 if the allocation is managed memory, my cuda version 12.1.

Answer 1 · 2024-02-18T21:13:34.000Z

Hi @achartier , I've created a repository to reproduce the bug with the callback for cudaMallocManaged. Could you please check it out?
https://github.com/Lin-Mao/sanitizer-api-bug

Answer 2 · 2024-02-18T21:15:45.000Z

Assigning to @aladram

Answer 3 · 2024-03-07T19:11:36.000Z

Hi @aladram @achartier, I am wondering if there's any update about this bug.

Answer 4 · 2024-03-07T19:16:00.000Z

Thank you Lin for the ping, this is expected as these flags are not mutually exclusive. 0x6 means both 0x2 and 0x4, i.e. both SANITIZER_MEMORY_FLAG_MANAGED and SANITIZER_MEMORY_FLAG_HOST_MAPPED. If you want to check if an allocation is managed, you can check for the flag using a binary AND, see example below:

bool isAllocationManaged = flags & SANITIZER_MEMORY_FLAG_MANAGED;

Please let me know if you have any additional questions, marking as closed for now,