32fbbd370c
shared with the kernel, mapped into kernel address space; kernel is notified of its location. kernel segment size is increased to make it fit. - map in kernel and other processes that don't have their own page table using single 4MB (global) mapping. - new sanity check facility: objects that are allocated with the slab allocator are, when running with sanity checking on, marked readonly until they are explicitly unlocked using the USE() macro. - another sanity check facility: collect all uses of memory and see if they don't overlap with (a) eachother and (b) free memory - own munmap() and munmap_text() functions. - exec() recovers from out-of-memory conditions properly now; this solves some weird exec() behaviour - chew off memory from the same side of the chunk as where we start scanning, solving some memory fragmentation issues - use avl trees for freelist and phys_ranges in regions - implement most useful part of munmap() - remap() stuff is GQ's for shared memory
72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
#ifndef _SANITYCHECK_H
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#define _SANITYCHECK_H 1
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#include "vm.h"
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#include "glo.h"
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#if SANITYCHECKS
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/* This macro is used in the sanity check functions, where file and
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* line are function arguments.
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*/
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#define MYASSERT(c) do { if(!(c)) { \
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printf("VM:%s:%d: %s failed\n", file, line, #c); \
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vm_panic("sanity check failed", NO_NUM); } } while(0)
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#define SLABSANITYCHECK(l) if((l) <= vm_sanitychecklevel) { \
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slab_sanitycheck(__FILE__, __LINE__); }
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#define SANITYCHECK(l) if(!nocheck && ((l) <= vm_sanitychecklevel)) { \
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struct vmproc *vmp; \
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vm_assert(incheck == 0); \
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incheck = 1; \
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usedpages_reset(); \
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slab_sanitycheck(__FILE__, __LINE__); \
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for(vmp = vmproc; vmp < &vmproc[VMP_NR]; vmp++) { \
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if((vmp->vm_flags & (VMF_INUSE | VMF_HASPT)) == \
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(VMF_INUSE | VMF_HASPT)) { \
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PT_SANE(&vmp->vm_pt); \
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} \
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} \
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map_sanitycheck(__FILE__, __LINE__); \
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vm_assert(incheck == 1); \
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incheck = 0; \
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}
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#include "../../kernel/proc.h"
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#define USE(obj, code) do { \
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slabunlock(obj, sizeof(*obj)); \
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do { \
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code \
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} while(0); \
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slablock(obj, sizeof(*obj)); \
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} while(0)
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#define SLABSANE(ptr) { \
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if(!slabsane_f(__FILE__, __LINE__, ptr, sizeof(*(ptr)))) { \
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printf("VM:%s:%d: SLABSANE(%s)\n", __FILE__, __LINE__, #ptr); \
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vm_panic("SLABSANE failed", NO_NUM); \
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} \
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}
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#define NOTRUNNABLE(ep) { \
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struct proc pr; \
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if(sys_getproc(&pr, ep) != OK) { \
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vm_panic("VM: sys_getproc failed", ep); \
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} \
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if(!pr.p_rts_flags) { \
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vm_panic("VM: runnable", ep); \
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} \
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}
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#else
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#define SANITYCHECK
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#define SLABSANITYCHECK(l)
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#define USE(obj, code) do { code } while(0)
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#define SLABSANE(ptr)
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#define NOTRUNNABLE(ep)
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#endif
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#endif
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