mirror of
https://github.com/ioacademy-jikim/debugging
synced 2025-06-08 00:16:11 +00:00
40 lines
790 B
C
40 lines
790 B
C
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#include <stdio.h>
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#include <stdlib.h>
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#include "../memcheck.h"
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int main1 ( void )
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{
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int xxx, i;
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for (i = 0; i < 10; i++) (void) VALGRIND_CHECK_VALUE_IS_DEFINED(xxx);
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return 0;
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}
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int main ( void )
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{
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int i, sum, m;
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char* aa = calloc(100,1);
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sum = 0;
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(void) VALGRIND_CHECK_MEM_IS_DEFINED(aa,100);
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m = VALGRIND_MAKE_MEM_UNDEFINED( &aa[49], 1 );
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(void) VALGRIND_CHECK_MEM_IS_ADDRESSABLE(aa,100);
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printf("m_na: returned value is %d\n", m );
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for (i = 0; i < 100; i++)
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sum += aa[i];
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printf("sum is %s\n", sum > 0 ? "positive" : "non-positive");
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m = VALGRIND_DISCARD(m);
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printf("m_rm: returned value is %d\n", m );
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for (i = 0; i < 100; i++)
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sum += aa[i];
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printf("sum is %s\n", sum > 0 ? "positive" : "non-positive");
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return 0;
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}
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