[Bug 1501545] Re: Valgrind fails on rdrand when the cpu supports it (haswell)

[Alexandros Frantzis]

This upstream bug looks related (affecting rdrand) but the instruction
bytes are different:

https://bugs.kde.org/show_bug.cgi?id=353370

** Bug watch added: KDE Bug Tracking System #353370
   https://bugs.kde.org/show_bug.cgi?id=353370

** Also affects: valgrind via
   https://bugs.kde.org/show_bug.cgi?id=353370
   Importance: Unknown
       Status: Unknown

** No longer affects: valgrind

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Title:
  Valgrind fails on rdrand when the cpu supports it (haswell)

Status in valgrind package in Ubuntu:
  New

Bug description:
  vex amd64->IR: unhandled instruction bytes: 0xF 0xC7 0xF0 0x89 0x6 0xF 0x42 0xC1
  vex amd64->IR: REX=0 REX.W=0 REX.R=0 REX.X=0 REX.B=0
  vex amd64->IR: VEX=0 VEX.L=0 VEX.nVVVV=0x0 ESC=0F
  vex amd64->IR: PFX.66=0 PFX.F2=0 PFX.F3=0

  opcode "rdrand %eax"

  Need valgrind 1:3.11.0-1ubuntu1

  How to reproduce (need haswell or a cpu that supports rdrand)
  http://pastebin.ubuntu.com/12628142/
  g++ -std=c++14 test.cpp -o test
  valgrind ./test

  Bug also needs to be filed upstream

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