Extended Description

In some situations when the XRay tracing system has been turned off in the middle of the execution of any one of __xray_Function{Entry,Exit,TailExit} and __xray_ArgLoggerEntry and the handlers have been un-installed, we could be left in an unaligned stack state.

In other cases, we might have a handler that doesn't leave the stack aligned in a specific state after returning, and could be in a situation where the stack is unaligned after the instrumentation is turned off.

We should fix the trampolines to adhere to the Linux x86_64 ABI and align the stack to 16-byte addresses always before calling a function, and re-aligning the stack before restoring the state of the registers and returning. In particular, we already do this correctly for the __xray_CustomEvent trampoline, we just need to port the same implementation across the other trampolines.