add LSAN support

[zhihuawensc]

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Description

Not sure if LeakSanitizer is supported on on pixel with userdebug build android 7.1.2

Environment Details

Platform - OSX 10.12.5 Device - Google Pixel, userdebug build NJH47B android-7.1.2_r17 NDK 15.1.4119039

I was trying to use Address Sanitizer on Anroid, I built the 7.1.2 userdebug version on Pixel.

After run ./asan_device_setup, I was able to catch simple use-after-free, stack-overflow and heap-buffer-overflow. However, ASAN seems cant detect simple memory leaks, is LSAN enabled on Android now.

[DanAlbert]

I'm actually not sure. LSAN is part of ASAN iirc, but idk if that's true for Android. @eugenis or @stephenhines would know.

[eugenis]

Not yet, sorry. See https://github.com/google/sanitizers/issues/379

[infomaniac777]

@eugenis Is there any timeline for Leak Sanitizer support in Android?

[infomaniac777]

I'm sure a lot of people are looking forward to this.

[DanAlbert]

@stephenhines: is this on the roadmap for the platform/toolchain?

[stephenhines]

No, we have no timeline for when LSan will be available in Android.

[infomaniac777]

@stephenhines I have found LSan to be very useful in debugging memory leaks. Is there not enough demand for LSan on Android ?

[stephenhines]

It just isn't a priority at this time. We don't have the ability to take on every project that could be helpful.

[infomaniac777]

Ok. I understand.

[axnsan12]

Judging by https://github.com/google/sanitizers/issues/379#issuecomment-907132213 and https://reviews.llvm.org/D85927 LSAN should now be supported on 30/31+?

Is there any update on the NDK side?

[stephenhines]

This is a feature request, and official support requires additional testing if we are going to advertise it in the NDK. I think that would be the biggest remaining blocker from considering this "Fixed".

[20083017]

android still not support lsan yet? hope for a quick answer~

[DanAlbert]

The quick answers are on this page. The bug is open and it's in the "unplanned" milestone.