On Thu, 13 Sep 2018, Gerald Pfeifer wrote: > On Mon, 10 Sep 2018, Martin Liška wrote: > > Works for me! One needed to add --wrapper gdb81,--args. So now > > I see a nice back-trace. > > Great! This appears to be a tough one, though breaking FreeBSD/i386 > with clang, GCC 6 and GCC 9 (two weeks old), Solaris, HP/UX, so looks > like something around glibc vs other libcs? > > > On FreeBSD 10.4 I tried malloc debugging setting MALLOC_CONF=zero:true > in the environment, to zero initialize all allocations, alas that also > did not change anything. > > Nor did MALLOC_CONF=tcache:false,junk:true. > > So my guess is it's a memory allocation issue, but perhaps one level > higher than the system functions? > > > Not sure how I can help; clearly not my area of expertise. :-(
If it reproduces with clang as a host compiler maybe you can use ASAN with it? I'm not sure if GCCs ASAN support is up to speed. IIRC the issues all show up with the stage1 compiler... Martin's now gone and I have to try set up a VM with FreeBSD to debug this myself. Richard.
