1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | #include <stdio.h>
#include <stdlib.h>
int main(int argc, char* argv[]) {
// MEMORY LEAK -- messier
int* a = malloc(sizeof(*a) * 3); // allocates 3 * 4 = 12 bytes
int* b = malloc(sizeof(*a) * 4); // allocates 4 * 4 = 16 bytes
int* c = malloc(sizeof(*a) * 5); // ..
int* d = malloc(sizeof(*a) * 6); // ..
int* e = malloc(sizeof(*a) * 7); // allocates 7 * 4 = 28 bytes
// total = 100 bytes
// assuming sizeof(int) is 4 bytes
// Free only 2 of them (b and c)
free(b);
free(c);
return EXIT_SUCCESS;
}
/*
HEAP SUMMARY:
in use at exit: 64 bytes in 3 blocks
total heap usage: 5 allocs, 2 frees, 100 bytes allocated
12 bytes in 1 blocks are definitely lost in loss record 1 of 3
at 0x4A06A2E: malloc (vg_replace_malloc.c:270)
by 0x4005BE: main (leak_fancy.c:7)
24 bytes in 1 blocks are definitely lost in loss record 2 of 3
at 0x4A06A2E: malloc (vg_replace_malloc.c:270)
by 0x4005E8: main (leak_fancy.c:10)
28 bytes in 1 blocks are definitely lost in loss record 3 of 3
at 0x4A06A2E: malloc (vg_replace_malloc.c:270)
by 0x4005F6: main (leak_fancy.c:11)
LEAK SUMMARY:
definitely lost: 64 bytes in 3 blocks
indirectly lost: 0 bytes in 0 blocks
possibly lost: 0 bytes in 0 blocks
still reachable: 0 bytes in 0 blocks
suppressed: 0 bytes in 0 blocks
*/
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */
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