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Diffstat (limited to 'lkm/vinum/memory.c')
| -rw-r--r-- | lkm/vinum/memory.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/lkm/vinum/memory.c b/lkm/vinum/memory.c new file mode 100644 index 0000000..5dee671 --- /dev/null +++ b/lkm/vinum/memory.c @@ -0,0 +1,186 @@ + +/*- + * Copyright (c) 1997, 1998 + * Nan Yang Computer Services Limited. All rights reserved. + * + * This software is distributed under the so-called ``Berkeley + * License'': + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Nan Yang Computer + * Services Limited. + * 4. Neither the name of the Company nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * This software is provided ``as is'', and any express or implied + * warranties, including, but not limited to, the implied warranties of + * merchantability and fitness for a particular purpose are disclaimed. + * In no event shall the company or contributors be liable for any + * direct, indirect, incidental, special, exemplary, or consequential + * damages (including, but not limited to, procurement of substitute + * goods or services; loss of use, data, or profits; or business + * interruption) however caused and on any theory of liability, whether + * in contract, strict liability, or tort (including negligence or + * otherwise) arising in any way out of the use of this software, even if + * advised of the possibility of such damage. + * + * $Id: memory.c,v 1.16 1998/08/08 04:43:22 grog Exp grog $ + */ + +#define REALLYKERNEL +#define USES_VM +#include "vinumhdr.h" + +extern jmp_buf command_fail; /* return on a failed command */ + +#if __FreeBSD__ >= 3 +/* Why aren't these declared anywhere? XXX */ +int setjmp(jmp_buf); +void longjmp(jmp_buf, int); +#endif + +void freedatabuf(struct mc *me); +caddr_t allocdatabuf(struct mc *me); + +void +expand_table(void **table, int oldsize, int newsize) +{ + if (newsize > oldsize) { + int *temp; + + temp = (int *) Malloc(newsize); /* allocate a new table */ + CHECKALLOC(temp, "vinum: Can't expand table\n"); + if (*table != NULL) { /* already something there, */ + bcopy((char *) *table, (char *) temp, oldsize); /* copy it to the old table */ + Free(*table); + } + *table = temp; + } +} + +#ifndef DEBUG +/* increase the size of a request block */ +void +expandrq(struct plexrq *prq) +{ + expand_table((void **) &prq->rqe, + prq->requests * sizeof(struct rqelement), + (prq->requests + RQELTS) * sizeof(struct rqelement)); + bzero(&prq->rqe[prq->requests], RQELTS * sizeof(struct rqelement)); /* clear the new part */ + prq->rqcount += RQELTS; +} + +#endif + +#if DEBUG /* XXX debug */ +#define MALLOCENTRIES 16384 +int malloccount = 0; +int highwater = 0; /* highest index ever allocated */ +static struct mc malloced[MALLOCENTRIES]; + +static total_malloced; + +caddr_t +MMalloc(int size, char *file, int line) +{ + caddr_t result; + int i; + static int seq = 0; + int s; + struct mc me; /* information to pass to allocdatabuf */ + + if (malloccount >= MALLOCENTRIES) { /* too many */ + printf("vinum: can't allocate table space to trace memory allocation"); + return 0; /* can't continue */ + } + result = malloc(size, M_DEVBUF, M_WAITOK); /* use malloc for smaller and irregular stuff */ + if (result == NULL) + printf("vinum: can't allocate %d bytes from %s:%d\n", size, file, line); + else { + me.flags = 0; /* allocation via malloc */ + s = splhigh(); + for (i = 0; i < malloccount; i++) { + if (((result + size) > malloced[i].address) + && (result < malloced[i].address + malloced[i].size)) /* overlap */ + Debugger("Malloc overlap"); + } + if (result) { + i = malloccount++; + total_malloced += size; + malloced[i].address = result; + malloced[i].size = size; + malloced[i].line = line; + malloced[i].seq = seq++; + malloced[i].flags = me.flags; + malloced[i].databuf = me.databuf; /* only used with kva alloc */ + bcopy(file, malloced[i].file, min(strlen(file) + 1, 16)); + } + if (malloccount > highwater) + highwater = malloccount; + splx(s); + } + return result; +} + +void +FFree(void *mem, char *file, int line) +{ + int i; + int s; + + s = splhigh(); + for (i = 0; i < malloccount; i++) { + if ((caddr_t) mem == malloced[i].address) { /* found it */ + bzero(mem, malloced[i].size); /* XXX */ + free(mem, M_DEVBUF); + malloccount--; + total_malloced -= malloced[i].size; + if (i < malloccount) /* more coming after */ + bcopy(&malloced[i + 1], &malloced[i], (malloccount - i) * sizeof(struct mc)); + splx(s); + return; + } + } + splx(s); + printf("Freeing unallocated data at 0x%08x from %s, line %d\n", (int) mem, file, line); + Debugger("Free"); +} + +void +vinum_meminfo(caddr_t data) +{ + struct meminfo *m = (struct meminfo *) data; + + m->mallocs = malloccount; + m->total_malloced = total_malloced; + m->malloced = malloced; + m->highwater = highwater; +} + +int +vinum_mallocinfo(caddr_t data) +{ + struct mc *m = (struct mc *) data; + unsigned int ent = *(int *) data; /* 1st word is index */ + + if (ent >= malloccount) + return ENOENT; + m->address = malloced[ent].address; + m->size = malloced[ent].size; + m->line = malloced[ent].line; + m->seq = malloced[ent].seq; + bcopy(malloced[ent].file, m->file, 16); + return 0; +} + +#endif |
