[Bug translator/11815] New: SDT_V2 sdt.h broken for modern gcc on x86-64, cxxclass.exp

["fche at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

With gcc 4.5ish on x86-64, SDT_V2 gets super optimized,
and gives us this ditty in the .probes section assembly code:

3:
        .asciz "$.LC0 $64 $24"  #,,
        .balign 8

where $.LC0 is a reference to a string literal.  This symbol
does not get propagated past the assembler, so stap has no
hope of resolving this particular operand.

Secondarily, the regexp magic in tapsets.cxx:4651ish

      // this pattern matches 0xD(%R) | (%R) | %R                              
                                                           
      const char *pattern =
"\\([0x]*-*[0-9]*\\)\\([(]*\\)\\(%*[0-9a-z][0-9a-z]*\\)\\([)]*\\)";            
                               

this unfortunately appears to match each of the above quoted operands, and
leads to wrong code generation (fetch_register(0)).

-- 
           Summary: SDT_V2 sdt.h broken for modern gcc on x86-64,
                    cxxclass.exp
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: translator
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: fche at redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=11815

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