42 lines
738 B
C
42 lines
738 B
C
#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdbool.h>
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#include <sys/prctl.h>
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#include <stdlib.h>
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int main(int argc, char** argv)
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{
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int merge = prctl(PR_GET_MEMORY_MERGE, 0, 0, 0, 0);
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printf("PR_SET_MEMORY_MERGE is %u after exec\n", merge);
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if(merge != 1)
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{
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fprintf(stderr, "KSM merging not enabled!\n");
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return 1;
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}
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printf("allocating memory\n");
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char* buf = malloc(100000000);
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printf("writeing memory\n");
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for(size_t i = 0; i < 100000000; i++)
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buf[i] = 0x44;
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printf("reading memory\n");
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volatile char read;
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while(true)
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{
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for(size_t i = 0; i < 100000000; i++)
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{
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read = buf[i];
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if(read != 0x44)
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return 2;
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}
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sleep(1);
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}
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return 0;
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}
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