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1a04431cff
Implement MutatorContextCheck on Windows. Add AVERT(MutatorContext, context) in PoolAccess and other functions. Document initialization functions MutatorContextInitFault and MutatorContextInitThread and implement them on Windows. Add a union discriminator to MutatorContextStruct on Windows so that we don't accidentally try to get the stack pointer from a fault context, or the exception address from a thread context. Copied from Perforce Change: 192567 ServerID: perforce.ravenbrook.com
137 lines
4.5 KiB
C
137 lines
4.5 KiB
C
/* prmcw3.c: MUTATOR CONTEXT FOR WIN32
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*
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* $Id$
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* Copyright (c) 2016 Ravenbrook Limited. See end of file for license.
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*
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* .purpose: Implement the mutator context module. See <design/prmc/>.
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*
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*
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* ASSUMPTIONS
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*
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* .context.regroots: The root registers are assumed to be recorded in
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* the context at word-aligned boundaries.
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*
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* .context.flags: The ContextFlags field in the CONTEXT structure
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* determines what is recorded by GetThreadContext. This must include:
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*
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* .context.sp: CONTEXT_CONTROL, so that the stack pointer (Esp on
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* IA-32; Rsp on x86-64) is recorded.
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*
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* .context.regroots: CONTEXT_INTEGER, so that the root registers
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* (Edi, Esi, Ebx, Edx, Ecx, Eax on IA-32; Rdi, Rsi, Rbx, Rbp, Rdx,
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* Rcx, Rax, R8, ..., R15 on x86-64) are recorded.
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*
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* See the header WinNT.h for documentation of CONTEXT and
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* ContextFlags.
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*/
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#include "prmcw3.h"
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SRCID(prmcw3, "$Id$");
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#if !defined(MPS_OS_W3)
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#error "prmcw3.c is specific to MPS_OS_W3"
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#endif
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Bool MutatorContextCheck(MutatorContext context)
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{
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CHECKS(MutatorContext, context);
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CHECKL(NONNEGATIVE(context->var));
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CHECKL(context->var < MutatorContextLIMIT);
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return TRUE;
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}
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Res MutatorContextInitThread(MutatorContext context, HANDLE thread)
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{
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BOOL success;
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AVER(context != NULL);
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context->var = MutatorContextTHREAD;
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/* This dumps the relevant registers into the context */
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/* .context.flags */
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context->the.context.ContextFlags = CONTEXT_CONTROL | CONTEXT_INTEGER;
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success = GetThreadContext(thread, &context->the.context);
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if (!success)
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return ResFAIL;
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context->sig = MutatorContextSig;
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AVERT(MutatorContext, context);
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return ResOK;
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}
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void MutatorContextInitFault(MutatorContext context,
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LPEXCEPTION_POINTERS ep)
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{
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AVER(context != NULL);
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AVER(ep != NULL);
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context->var = MutatorContextFAULT;
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context->the.ep = ep;
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context->sig = MutatorContextSig;
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AVERT(MutatorContext, context);
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}
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Res MutatorContextScan(ScanState ss, MutatorContext context,
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mps_area_scan_t scan_area, void *closure)
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{
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CONTEXT *cx;
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Res res;
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AVERT(ScanState, ss);
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AVERT(MutatorContext, context);
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AVER(context->var == MutatorContextTHREAD);
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cx = &context->the.context;
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res = TraceScanArea(ss, (Word *)cx, (Word *)((char *)cx + sizeof *cx),
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scan_area, closure); /* .context.regroots */
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return res;
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}
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/* C. COPYRIGHT AND LICENSE
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*
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* Copyright (C) 2001-2016 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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