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authorNick Alcock <nick.alcock@oracle.com>2021-03-25 16:32:46 +0000
committerNick Alcock <nick.alcock@oracle.com>2021-03-25 16:32:48 +0000
commit86f64bf43f70ecefa9232f5b8621b179dfff52fd (patch)
treea5bdee1f432ebdbe78db8a65e6d0133907c9c9a5 /gold/reduced_debug_output.cc
parent24c877f9b19dc38f9c40e25116175481c8bb78f2 (diff)
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libctf, serialize: functions with no args have a NULL dtd_vlen
Every place that accesses a function's dtd_vlen accesses it only if the number of args is nonzero, except the serializer, which always tries to memcpy it. The number of bytes it memcpys in this case is zero, but it is still undefined behaviour to copy zero bytes from a null pointer. So check for this case explicitly. libctf/ChangeLog 2021-03-25 Nick Alcock <nick.alcock@oracle.com> PR libctf/27628 * ctf-serialize.c (ctf_emit_type_sect): Allow for a NULL vlen in CTF_K_FUNCTION types.
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