2 Commits

Author	SHA1	Message	Date
Ulrich Weigand	24ec521cd7	[libunwind][SystemZ] Use process_vm_readv to avoid potential segfaults ... Fix potential crashes during unwind when checking for signal frames and the current PC is invalid. The same bug was fixed for aarch64 in https://reviews.llvm.org/D126343. Reviewed by: MaskRay Differential Revision: https://reviews.llvm.org/D129856	2022-07-18 16:54:48 +02:00
Shoaib Meenai	0be0a53df6	[libunwind] Use process_vm_readv to avoid potential segfaults ... We've observed segfaults in libunwind when attempting to check for the Linux aarch64 sigreturn frame, presumably because of bad unwind info leading to an incorrect PC that we attempt to read from. Use process_vm_readv to read the memory safely instead. The s390x code path should likely follow suit, but I don't have the hardware to be able to test that, so I didn't modify it here either. Reviewed By: MaskRay, rprichard, #libunwind Differential Revision: https://reviews.llvm.org/D126343	2022-05-26 09:12:51 -07:00