927e19f5f3
ASan's instrumentation pass uses `ASanStackFrameLayout::ComputeASanStackFrameLayout()` to calculate the offset of variables, taking into account alignment. However, the fake stack frames returned by the runtime's `GetFrame()` are not guaranteed to be sufficiently aligned (and in some cases, even guaranteed to be misaligned), hence the offset addresses may sometimes be misaligned. This change fixes the misalignment issue by padding the FakeStack. Every fake stack frame is guaranteed to be aligned to the size of the frame. The memory overhead is low: 64KB per FakeStack, compared to the FakeStack size of ~700KB (min) to 11MB (max). Updates the test case from https://github.com/llvm/llvm-project/pull/152889.
Compiler-RT ================================ This directory and its subdirectories contain source code for the compiler support routines. Compiler-RT is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt. ================================