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3e01ac9b04
If user requests a size >= 65532, adding the heap admin size overflows size. Fixes #2358.
82 lines
2.3 KiB
C
82 lines
2.3 KiB
C
#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include "unittest.h"
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TEST
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{
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char *buf, *buf2;
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unsigned int i;
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buf = realloc(NULL, 0);
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ASSERT_IsTrue (buf == NULL, "realloc (NULL, 0) returned something");
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for (i = 1; i < 10; i++) {
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buf2 = realloc(buf, i);
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ASSERT_IsTrue (buf2 != NULL, "small realloc returned nothing");
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if (i > 1) {
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ASSERT_IsTrue (buf2 == buf, "buf shouldn't have moved");
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}
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buf = buf2;
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}
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buf = realloc(NULL, 15);
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ASSERT_IsTrue (buf != NULL, "realloc (NULL, 15) returned nothing");
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buf = realloc(buf, 0);
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ASSERT_IsTrue (buf == NULL, "realloc (buf, 0) returned something");
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buf = realloc(buf, 32);
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memset(buf, 'a', 32);
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for (i = 0; i < 32; i++) {
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ASSERT_IsTrue(buf[i] == 'a', "wrong contents in buf");
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}
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/* Now realloc larger, while there's nothing else in the heap */
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buf = realloc(buf, 64);
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memset(buf+32, 'b', 32);
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for (i = 0; i < 32; i++) {
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ASSERT_IsTrue(buf[i] == 'a', "wrong contents in start of buf");
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}
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for (i = 32; i < 64; i++) {
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ASSERT_IsTrue(buf[i] == 'b', "wrong contents in end of buf");
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}
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/* Now realloc smaller, while there's nothing else in the heap */
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buf = realloc(buf, 40);
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for (i = 0; i < 32; i++) {
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ASSERT_IsTrue(buf[i] == 'a', "wrong contents in start of buf");
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}
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for (i = 32; i < 40; i++) {
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ASSERT_IsTrue(buf[i] == 'b', "wrong contents in end of buf");
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}
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/* Allocate something else, so next realloc has to change block */
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malloc(50);
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/* Now realloc larger, with something else in the heap */
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buf = realloc(buf, 128);
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for (i = 0; i < 32; i++) {
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ASSERT_IsTrue(buf[i] == 'a', "wrong contents in start of buf");
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}
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for (i = 32; i < 40; i++) {
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ASSERT_IsTrue(buf[i] == 'b', "wrong contents in end of buf");
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}
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for (i = 129; i < 8192; i++) {
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buf = realloc(buf, i);
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ASSERT_IsTrue(buf != NULL, "realloc failed");
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}
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malloc(4096);
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buf2 = realloc(buf, 58000UL);
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ASSERT_IsTrue (buf2 == NULL, "realloc (buf, 58000) returned something");
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for (i = 65535UL; i > 65527UL; i--) {
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buf2 = realloc(buf, i);
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ASSERT_IsTrue (buf2 == NULL, "realloc returned something but shouldn't have");
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}
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}
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ENDTEST
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