[DTrace-devel] test FAILs with "5d3365d7 First implementation of the printf action"

[Eugene Loh]

Starting with the above patch, I get consistent FAILs with

         test/unittest/actions/printf/tst.conv_a.d
         test/unittest/builtinvar/tst.hpriority.d
         test/unittest/builtinvar/tst.lwpsinfo1.d
         test/unittest/inline/tst.InlineTypedef.d
         test/unittest/lexer/tst.keyword-member.d
         test/unittest/printf/tst.str.d

The first one does a "printf("%a", &`max_pfn)" and prints 
"vmlinux`max_pfn" (which one would expect from the documentation or 
DTv1) but the .r file expects "{ptr}".  How could this test ever have 
PASSed?

The remaining five FAIL because BPF complains of an invalid memory 
access, presumably because we're asking BPF to dereference pointers it 
does not recognize.  I assume we do not yet support access to kernel 
variables like that, and the tests used to PASS since they didn't do 
anything and didn't check anything but now they are trying to do something.

What I'm trying to figure out is if this patch was put back with FAILing 
tests (and a new test that was broken).  I don't understand.