mirror of
https://github.com/Zenithsiz/ftmemsim-valgrind.git
synced 2026-02-04 02:18:37 +00:00
87e9f78e0c
to translations and back to dispatcher, and also different arg passing conventions to LibVEX_Translate). - Rewrite x86 dispatcher to not increment the profiling counters unless requested by the user. This dramatically reduces the D1 miss rate and gives considerable performance improvement on x86. Also, restructure and add comments to dispatch-x86-linux.S to make it much easier to follow (imo). amd64/ppc32/ppc64 fixes to follow. git-svn-id: svn://svn.valgrind.org/valgrind/trunk@5345
76 lines
3.1 KiB
C
76 lines
3.1 KiB
C
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/*--------------------------------------------------------------------*/
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/*--- The dispatcher. pub_core_dispatch.h ---*/
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/*--------------------------------------------------------------------*/
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/*
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This file is part of Valgrind, a dynamic binary instrumentation
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framework.
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Copyright (C) 2000-2005 Julian Seward
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jseward@acm.org
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307, USA.
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The GNU General Public License is contained in the file COPYING.
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*/
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#ifndef __PUB_CORE_DISPATCH_H
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#define __PUB_CORE_DISPATCH_H
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//--------------------------------------------------------------------
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// PURPOSE: This module contains the inner loop of the execution
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// mechanism, which is: find next basic block, execute it, repeat until
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// the next bb isn't found in the fast-cache; or if the current bb
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// exited with a request for some special action before continuing; or
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// if the current thread has used up its scheduling quantum.
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//--------------------------------------------------------------------
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#include "pub_core_dispatch_asm.h"
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/* This subroutine is called from the C world. It is passed
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a pointer to the VEX guest state (arch.vex). It must run code
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from the instruction pointer in the guest state, and exit when
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VG_(dispatch_ctr) reaches zero, or we need to defer to the scheduler.
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The return value must indicate why it returned back to the scheduler.
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It can also be exited if the executing code throws a non-resumable
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signal, for example SIGSEGV, in which case control longjmp()s back past
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here.
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If do_profiling is nonzero, the profile counters arrays should be
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updated for each translation run.
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This code simply handles the common case fast -- when the translation
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address is found in the translation cache. For anything else, the
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scheduler does the work.
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*/
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extern
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UWord VG_(run_innerloop) ( void* guest_state, UWord do_profiling );
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#if defined(VGA_x86) || defined(VGA_amd64)
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/* We need to locate a couple of labels inside VG_(run_innerloop), so
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that Vex can add branches to them from generated code. Hence the
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following somewhat bogus decls. At least on x86 and amd64. */
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extern void VG_(run_innerloop__dispatch_unprofiled);
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extern void VG_(run_innerloop__dispatch_profiled);
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#endif
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#endif // __PUB_CORE_DISPATCH_H
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/*--------------------------------------------------------------------*/
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/*--- end ---*/
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/*--------------------------------------------------------------------*/
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