mirror of https://github.com/t1meshift/os_labs.git
51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
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/* Example code for Think OS.
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Copyright 2015 Allen Downey
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License: Creative Commons Attribution-ShareAlike 3.0
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*/
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#define PRINT_DISTANCE(a, b) printf("Distance between " #a " and " #b ": %ld\n", (void *) (a) - (void *) (b))
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#include <malloc.h>
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#include <mcheck.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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int global;
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int another_global;
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int main() {
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char malloc_trace_path[4096];
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getcwd(malloc_trace_path, 4096);
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strcat(malloc_trace_path, "/malloc_trace.txt");
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setenv("MALLOC_TRACE", malloc_trace_path, 0);
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mtrace();
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int local = 5;
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int another_local = 7;
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void *p = malloc(128);
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void *another_p = malloc((1 << 18));
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printf("Address of main is %p\n", main);
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printf("Address of global is %p\n", &global);
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printf("Address of local is %p\n", &local);
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printf("Address of another_local is %p\n", &another_local);
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printf("Address of p is %p\n", p);
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printf("Address of another_p is %p\n\n", another_p);
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PRINT_DISTANCE(&global, &main);
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PRINT_DISTANCE(&global, &another_global);
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PRINT_DISTANCE(&local, &another_local);
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PRINT_DISTANCE(p, another_p);
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malloc_stats();
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FILE *minfo = fopen("malloc_info.xml", "w");
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malloc_info(0, minfo);
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fclose(minfo);
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return 0;
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}
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