[PATCH] D29586: [lsan] Enable LSan for arm Linux

[Maxim Ostapenko via Phabricator via llvm-commits]

m.ostapenko added a comment.

In https://reviews.llvm.org/D29586#679711, @ygribov wrote:

> One option is to force libasan and tests to compile to ARM (via `-marm` switch) which is known to work. I think common understanding is that fast unwinder is unfixable in Thumb mode.


I'm afraid this isn't enough, consider two following cases:

1. If LSan itself is compiled with Thumb fast unwinder would be unable to leave first frame.
2. Likewise, if LSan is compiled with GCC 4.8, fast unwinder would be unable to leave first frame due to __interceptor_malloc's frame doesn't contain saved fp (see objdump output several comments above).


Repository:
  rL LLVM

https://reviews.llvm.org/D29586