[Qemu-devel] [PATCH v3 00/25] Do away with TB retranslation

[Richard Henderson <rth@twiddle.net>]

Version 3.  Notable changes:

  (1) Add a guard page at the end of the code_gen_buffer.
      We will segv insted of silently corrupting memory
      if we overrun the buffer.

      The win32 bits tested under wine only; I haven't put together
      all the right bits under my win7 vm yet.  Although I ought to
      be able to copy them from the wine installation...

  (2) Overflow protection via highwater mark.  At first I was going
      to make this be the solution for win32 only, so that I didn't
      have to figure out how to make SEH dtrt wrt catching #GPF.

      But I can't actually measure the performance overhead of these
      checks under Linux.  Which might not be the case if we instead
      have to call sigsetjmp at the beginning of tb_gen_code.  So now
      I'm thinking this might be better solution universally.


r~


Richard Henderson (25):
  tcg: Rename debug_insn_start to insn_start
  target-*: Unconditionally emit tcg_gen_insn_start
  target-*: Increment num_insns immediately after tcg_gen_insn_start
  target-*: Introduce and use cpu_breakpoint_test
  tcg: Allow extra data to be attached to insn_start
  target-arm: Add condexec state to insn_start
  target-i386: Add cc_op state to insn_start
  target-mips: Add delayed branch state to insn_start
  target-s390x: Add cc_op state to insn_start
  target-sh4: Add flags state to insn_start
  target-cris: Mirror gen_opc_pc into insn_start
  target-sparc: Tidy gen_branch_a interface
  target-sparc: Split out gen_branch_n
  target-sparc: Remove gen_opc_jump_pc
  target-sparc: Add npc state to insn_start
  tcg: Merge cpu_gen_code into tb_gen_code
  target-*: Drop cpu_gen_code define
  tcg: Add TCG_MAX_INSNS
  tcg: Pass data argument to restore_state_to_opc
  tcg: Save insn data and use it in cpu_restore_state_from_tb
  tcg: Remove gen_intermediate_code_pc
  tcg: Remove tcg_gen_code_search_pc
  tcg: Emit prologue to the beginning of code_gen_buffer
  tcg: Allocate a guard page after code_gen_buffer
  tcg: Check for overflow via highwater mark

 include/exec/exec-all.h       |  12 +-
 include/qom/cpu.h             |  16 ++
 target-alpha/cpu.h            |   1 -
 target-alpha/translate.c      |  70 ++----
 target-arm/cpu.h              |   2 +-
 target-arm/translate-a64.c    |  48 +---
 target-arm/translate.c        |  83 +++----
 target-arm/translate.h        |   8 +-
 target-cris/cpu.h             |   1 -
 target-cris/translate.c       |  93 ++------
 target-cris/translate_v10.c   |   3 -
 target-i386/cpu.h             |   2 +-
 target-i386/translate.c       | 106 +++------
 target-lm32/cpu.h             |   1 -
 target-lm32/translate.c       |  83 ++-----
 target-m68k/cpu.h             |   1 -
 target-m68k/translate.c       |  82 ++-----
 target-microblaze/cpu.h       |   1 -
 target-microblaze/translate.c |  83 ++-----
 target-mips/cpu.h             |   2 +-
 target-mips/translate.c       |  98 +++-----
 target-moxie/cpu.h            |   1 -
 target-moxie/translate.c      |  82 +++----
 target-openrisc/cpu.h         |   1 -
 target-openrisc/translate.c   |  78 ++-----
 target-ppc/cpu.h              |   1 -
 target-ppc/translate.c        |  72 ++----
 target-s390x/cpu.h            |   2 +-
 target-s390x/translate.c      |  78 ++-----
 target-sh4/cpu.h              |   2 +-
 target-sh4/translate.c        |  91 +++-----
 target-sparc/cpu.h            |   2 +-
 target-sparc/translate.c      | 185 +++++++--------
 target-tilegx/cpu.h           |   1 -
 target-tilegx/translate.c     |  58 ++---
 target-tricore/translate.c    |  59 ++---
 target-unicore32/translate.c  |  83 ++-----
 target-xtensa/cpu.h           |   1 -
 target-xtensa/translate.c     |  79 ++-----
 tcg/tcg-op.h                  |  52 ++++-
 tcg/tcg-opc.h                 |   4 +-
 tcg/tcg.c                     | 158 +++++++------
 tcg/tcg.h                     |  21 +-
 tci.c                         |   9 -
 translate-all.c               | 520 +++++++++++++++++++++++++-----------------
 45 files changed, 950 insertions(+), 1486 deletions(-)

-- 
2.4.3