Main changes: - COW optimization for safecopy. - safemap, a grant-based interface for sharing memory regions between processes. - Integration with safemap and complete rework of DS, supporting new data types natively (labels, memory ranges, memory mapped ranges). - For further information: http://wiki.minix3.org/en/SummerOfCode2009/MemoryGrants Additional changes not included in the original Wu's branch: - Fixed unhandled case in VM when using COW optimization for safecopy in case of a block that has already been shared as SMAP. - Better interface and naming scheme for sys_saferevmap and ds_retrieve_map calls. - Better input checking in syslib: check for page alignment when creating memory mapping grants. - DS notifies subscribers when an entry is deleted. - Documented the behavior of indirect grants in case of memory mapping. - Test suite in /usr/src/test/safeperf|safecopy|safemap|ds/* reworked and extended. - Minor fixes and general cleanup. - TO-DO: Grant ids should be generated and managed the way endpoints are to make sure grant slots are never misreused.
50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
#define _SYSTEM
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#define _MINIX
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#include <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <minix/config.h>
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#include <minix/com.h>
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#include <minix/type.h>
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#include <minix/const.h>
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#include <minix/endpoint.h>
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#include <minix/safecopies.h>
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#include <minix/syslib.h>
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#include <minix/sysutil.h>
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#include <errno.h>
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/* TEST_PAGE_SHIFT =
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* log2(CLICK_SIZE * TEST_PAGE_NUM) = CLICK_SHIFT + log2(TEST_PAGE_NUM)
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*/
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#define TEST_PAGE_NUM 8
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#define TEST_PAGE_SHIFT 15
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#define BUF_SIZE (TEST_PAGE_NUM * CLICK_SIZE)
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#define BUF_START 100
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#define FIFO_REQUESTOR "/usr/src/test/safecopy/1fifo"
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#define FIFO_GRANTOR "/usr/src/test/safecopy/2fifo"
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#define FIFO_WAIT(fid) { \
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int a; \
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if(read(fid, &a, sizeof(a)) != sizeof(a)) \
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panic(__FILE__, "FIFO_WAIT failed", NO_NUM); \
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}
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#define FIFO_NOTIFY(fid) { \
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int a = 1; \
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if(write(fid, &a, sizeof(a)) != sizeof(a)) \
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panic(__FILE__, "FIFO_NOTIFY failed", NO_NUM); \
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}
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#define DEBUG 0
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#if DEBUG
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# define dprint printf
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#else
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# define dprint (void)
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#endif
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