[Lldb-commits] [PATCH] D71372: [lldb] Add additional validation on return address in 'thread step-out'

Mark Mossberg via Phabricator via lldb-commits lldb-commits at lists.llvm.org
Sun Dec 15 13:31:07 PST 2019

mossberg added a comment.

I wanted to also mention that this patch won't address buggy behavior if, for example, the stub takes a function pointer on the stack (vs a normal data pointer). In this case, the executable check will succeed, and the breakpoint will be written, but to a potentially arbitrary code address. This may or may not lead to the debugger "randomly" breaking out later in a debug session if or when that code happens to be executed (I've reproduced this, but also seen some very confusing behavior where in some situations the breakpoint logging will say a breakpoint is written, but it doesn't seem like this was actually the case.)

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