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Correcting design documentation relating to stacks. Referencing hot and cold end concepts from glossary entry for control stacks. Copied from Perforce Change: 189320 ServerID: perforce.ravenbrook.com
114 lines
4.6 KiB
C
114 lines
4.6 KiB
C
/* ssw3i3pc.c: STACK SCANNING FOR WIN32 WITH PELLES C
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*
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* $Id$
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* Copyright (c) 2001-2014 Ravenbrook Limited. See end of file for license.
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*
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* This scans the stack and fixes the registers which may contain roots.
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* See <design/thread-manager/>.
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*
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* .assume.ms-compat: We rely on the fact that Pelles C's setjmp stores
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* the callee-save registers in the jmp_buf and is compatible with Microsoft
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* C. The Pelles C 7.00 setjmp.h header has a comment "MS compatible". See
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* also "Is Pelles C's jmp_buf compatible with Microsoft C's?"
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* <http://forum.pellesc.de/index.php?topic=5464>
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*
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* REFERENCES
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*
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* "Argument Passing and Naming Conventions"; MSDN; Microsoft Corporation;
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* <http://msdn.microsoft.com/en-us/library/984x0h58%28v=vs.100%29.aspx>.
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*
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* "Calling conventions for different C++ compilers and operating systems";
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* Agner Fog; Copenhagen University College of Engineering; 2012-02-29;
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* <http://agner.org./optimize/calling_conventions.pdf>.
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*/
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#include "mpm.h"
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#include <setjmp.h>
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SRCID(ssw3i3pc, "$Id$");
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/* This definition isn't in the Pelles C headers, so we reproduce it here.
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* See .assume.ms-compat. */
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typedef struct __JUMP_BUFFER {
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unsigned long Ebp;
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unsigned long Ebx;
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unsigned long Edi;
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unsigned long Esi;
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unsigned long Esp;
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unsigned long Eip;
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unsigned long Registration;
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unsigned long TryLevel;
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unsigned long Cookie;
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unsigned long UnwindFunc;
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unsigned long UnwindData[6];
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} _JUMP_BUFFER;
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Res StackScan(ScanState ss, Word *stackCold,
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mps_area_scan_t scan_area,
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void *closure, size_t closure_size)
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{
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jmp_buf jb;
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/* .assume.ms-compat */
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(void)setjmp(jb);
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/* These checks, on the _JUMP_BUFFER defined above, are mainly here
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* to maintain similarity to the matching code on the MPS_BUILD_MV
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* version of this code. */
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AVER(sizeof(((_JUMP_BUFFER *)jb)->Ebx) == sizeof(Word));
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AVER(sizeof(((_JUMP_BUFFER *)jb)->Edi) == sizeof(Word));
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AVER(sizeof(((_JUMP_BUFFER *)jb)->Esi) == sizeof(Word));
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/* Ensure that the callee-save registers will be found by
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StackScanInner when it's passed the address of the Ebx field. */
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AVER(offsetof(_JUMP_BUFFER, Edi) == offsetof(_JUMP_BUFFER, Ebx) + 4);
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AVER(offsetof(_JUMP_BUFFER, Esi) == offsetof(_JUMP_BUFFER, Ebx) + 8);
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return StackScanInner(ss, stackCold, (Word *)&((_JUMP_BUFFER *)jb)->Ebx, 3,
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scan_area, closure, closure_size);
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}
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/* C. COPYRIGHT AND LICENSE
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*
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* Copyright (C) 2001-2014 Ravenbrook Limited <http://www.ravenbrook.com/>.
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* All rights reserved. This is an open source license. Contact
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* Ravenbrook for commercial licensing options.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Redistributions in any form must be accompanied by information on how
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* to obtain complete source code for this software and any accompanying
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* software that uses this software. The source code must either be
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* included in the distribution or be available for no more than the cost
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* of distribution plus a nominal fee, and must be freely redistributable
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* under reasonable conditions. For an executable file, complete source
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* code means the source code for all modules it contains. It does not
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* include source code for modules or files that typically accompany the
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* major components of the operating system on which the executable file
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* runs.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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* PURPOSE, OR NON-INFRINGEMENT, ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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