Found this by testing the Solaris execx (the bits that are
Linux-cmpatible) test. That was giving
--28286-- VALGRIND INTERNAL ERROR: Valgrind received a signal 11 (SIGSEGV) - exiting
--28286-- si_code=2; Faulting address: 0x4A0095A; sp: 0x1002ca9c88
valgrind: the 'impossible' happened:
Killed by fatal signal
host stacktrace:
==28286== at 0x5803DE54: vgPlain_strcpy (m_libcbase.c:309)
==28286== by 0x5810A9B3: vgSysWrap_linux_sys_execveat_before (syswrap-linux.c:13310)
==28286== by 0x580953C9: vgPlain_client_syscall (syswrap-main.c:2234)
It's a mistake to copy the path obtained with VG_(resolve_filename) to
the client ARG2, it's unlikely to have space for the path.
Instead just copy the pointer.
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