BUILD_TESTS don't work on SPARC64 debian 7.8.0 about pugixml HOT 5 CLOSED

It's interesting that this problem can't really be caught by the undefined behavior sanitizer on x86/x64 despite the fact that it checks alignment violations:

x86 has sizeof(void*) = 4 alignof(double) = 4
x64 has sizeof(void*) = 8 alignof(double) = 8

And the problem only manifests when sizeof(void*) < alignof(double).

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A qemu image would help.

I suspect that this is specific to the way the tests are setup combined with the unaligned memory access not working. The tests override allocation functions but in doing so they violate the basic malloc contract because they return unaligned memory. This is done to catch single-byte buffer overflows on heap. This can create cases when pugixml accesses unaligned memory - I had these issues before with instrumentation that flags unaligned accesses like UB sanitizers.

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i'll prepare a small installation text and put the image somewhere on an free downloader website, but beware the sparc emulation is textmode only, very slow (costs serveral minutes to compile pugixml) but works

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uploaded the image+start description (pugi_sparc.txt) to depositfiles (seems to be the only free file hoster with ftp upload feature)
https://depositfiles.com/files/sj20aqwp0

press the "regular download" button, wait some seconds, solve the chapca, "download file in regular mode by browser"

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cmake 3.2.3 (build from source in 10h)

Wow. Thank you! I'm looking into this (btw pugixml does not require cmake - you can just do "make test" after git clone)

As I suspected, one of the issues is the test-only allocator; although even if I disable that I still get crashes somewhere further.

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