c5b309ff07
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.
51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
#define _SYSTEM
|
|
#define _MINIX
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <stdlib.h>
|
|
#include <signal.h>
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
|
|
#include <minix/config.h>
|
|
#include <minix/com.h>
|
|
#include <minix/type.h>
|
|
#include <minix/const.h>
|
|
#include <minix/endpoint.h>
|
|
#include <minix/safecopies.h>
|
|
#include <minix/syslib.h>
|
|
#include <minix/sysutil.h>
|
|
#include <errno.h>
|
|
|
|
/* TEST_PAGE_SHIFT =
|
|
* log2(CLICK_SIZE * TEST_PAGE_NUM) = CLICK_SHIFT + log2(TEST_PAGE_NUM)
|
|
*/
|
|
#define TEST_PAGE_NUM 8
|
|
#define TEST_PAGE_SHIFT 15
|
|
|
|
#define BUF_SIZE (TEST_PAGE_NUM * CLICK_SIZE)
|
|
#define BUF_START 100
|
|
|
|
#define FIFO_REQUESTOR "/usr/src/test/safecopy/1fifo"
|
|
#define FIFO_GRANTOR "/usr/src/test/safecopy/2fifo"
|
|
|
|
#define FIFO_WAIT(fid) { \
|
|
int a; \
|
|
if(read(fid, &a, sizeof(a)) != sizeof(a)) \
|
|
panic(__FILE__, "FIFO_WAIT failed", NO_NUM); \
|
|
}
|
|
#define FIFO_NOTIFY(fid) { \
|
|
int a = 1; \
|
|
if(write(fid, &a, sizeof(a)) != sizeof(a)) \
|
|
panic(__FILE__, "FIFO_NOTIFY failed", NO_NUM); \
|
|
}
|
|
|
|
#define DEBUG 0
|
|
#if DEBUG
|
|
# define dprint printf
|
|
#else
|
|
# define dprint (void)
|
|
#endif
|
|
|