內存鎖定

+#include <stdio.h>
+#include <errno.h>
+#include <sys/mman.h>


+                               uint64_t  myAddress_ = (uint64_t)(buf)+536;
+                               uint64_t start_address = (myAddress_ >> PAGE_SHIFT) << PAGE_SHIFT;
+                               if (mprotect((void*)start_address, PAGE_SIZE, PROT_READ) == -1) {
+                                       fprintf(stderr,"liyl add line[%d] buf= %p err=%s",__LINE__,buf,strerror(errno));
+                               }



#if 0 
int retValue = posix_memalign(&protectBuf, pagesize, pagesize*1000*10);
if(retValue != 0 ) {
 LOG(E, "protectBuf is posix_memalign failed (%d)",retValue); 
} 
if(mprotect(protectBuf, pagesize*1000*10, PROT_READ) == -1) {
 LOG(E, "mprotect 1 strerr = %s",strerror(errno)); 4_
}
#else 
protectBuf = (char*)malloc(pagesize*1000*51); 
if(protectBuf == NULL) {
return;
}
uint64_t myAddress = (uint64_t)(protectBuf); 
uint64_t start_Address = myAddress - (myAddress & (pagesize-1));
LOG(E, "protectBuf (%p) start_Address %p",protectBuf,(char*)start_Address); fprintf(stderr, "protectBuf (%p) start_Address %p",protectBuf,(char*)start_Address); if(mprotect((char*)start_Address, pagesize*1000*50, PROT_READ) == -1) { 
LOG(E, "mprotect 1 strerr = %s",strerror(errno));
}
#endif