mirror of
https://github.com/gigablast/open-source-search-engine.git
synced 2024-10-04 12:17:35 +03:00
107 lines
2.4 KiB
C++
107 lines
2.4 KiB
C++
//#include "gb-include.h"
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#include <malloc.h>
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#include <sys/time.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/mman.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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bool testChunk ( unsigned char *mem , long memSize ) {
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unsigned char *pend = mem + memSize;
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for ( unsigned char *p = mem ; p < pend ; p++ ) {
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*p = 0;
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if ( *p ) return false;
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*p = 0x01;
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if ( *p != 0x01 ) return false;
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*p = 0x02;
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if ( *p != 0x02 ) return false;
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*p = 0x04;
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if ( *p != 0x04 ) return false;
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*p = 0x08;
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if ( *p != 0x08 ) return false;
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*p = 0x10;
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if ( *p != 0x10 ) return false;
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*p = 0x20;
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if ( *p != 0x20 ) return false;
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*p = 0x40;
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if ( *p != 0x40 ) return false;
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*p = 0x80;
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if ( *p != 0x80 ) return false;
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*p = 0x01;
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*p <<= 1; if ( *p != 0x02 ) return false;
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*p <<= 1; if ( *p != 0x04 ) return false;
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*p <<= 1; if ( *p != 0x08 ) return false;
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*p <<= 1; if ( *p != 0x10 ) return false;
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*p <<= 1; if ( *p != 0x20 ) return false;
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*p <<= 1; if ( *p != 0x40 ) return false;
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*p <<= 1; if ( *p != 0x80 ) return false;
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}
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return true;
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}
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int main ( int argc , char *argv[] ) {
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if ( argc < 2 || argc > 2 ) {
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fprintf(stderr,"quarantine <bytes>\n");
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return -1;
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}
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//mlockall(MCL_FUTURE);
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long long maxMem = atoi(argv[1]); // 1GB?
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long long chunkSize = 300000;
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long n = 0;
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long max = (long)(maxMem / chunkSize) + 10;
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char *mem [ max ];
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long long total = 0LL;
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for ( ; ; ) {
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mem[n] = (char *)malloc ( chunkSize );
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if ( mem[n] == NULL ) break;
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total += chunkSize;
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n++;
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if ( total >= maxMem ) break;
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if ( (n % 1000) == 0 )
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fprintf(stderr,"quarantine: alloc block #%li\n",n);
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}
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fprintf(stderr,
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"quarantine: grabbed %li chunks of ram for "
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"total of %llu : %s\n",
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n,total,strerror(errno));
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fprintf(stderr,
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"quarantine: scanning grabbed mem for errors.\n");
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long long badRam = 0;
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// scan each chunk
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for ( long i = 0 ; i < n ; i++ ) {
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// erturns true if passes
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if ( testChunk ( (unsigned char *)mem[i], chunkSize ) )
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free ( mem[i] );
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// otherwise do not free it
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else {
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badRam += chunkSize;
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// and lock it up
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mlock ( mem[i] , chunkSize );
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}
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if ( (i % 1000) == 0 )
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fprintf(stderr,"quarantine: test block #%li\n",i);
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}
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if ( badRam ) {
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fprintf(stderr,
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"quarantine: quarantining %llu bytes of bad ram.\n",
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badRam);
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// sleep forever
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for ( ; ; ) sleep ( 100 );
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}
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fprintf(stderr,"quarantine: all ram was good. exiting.\n");
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return 0;
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}
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