mirror of
https://github.com/ioacademy-jikim/debugging
synced 2025-06-08 16:36:21 +00:00
75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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static void breakme(int line)
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{
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fprintf(stderr, "breakme function called from line %d\n", line);
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fflush(stderr);
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}
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static char undefined[10] = "undefined";
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int main (int argc, char *argv[])
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{
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/* we will test
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read watchpoint at 0,
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read/write watchpoints at 4
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write watchpoints at 8 */
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breakme(__LINE__); //break1
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/* We verify read watchpoints are triggered at 0 and 4, not at 8 */
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fprintf(stderr, "before reading 0/4/8\n");
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if (undefined[0] == 'u')
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fprintf(stderr, "u: Expected value at 0\n");
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else
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fprintf(stderr, "u: Unexpected value at 0\n");
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if (undefined[4] == 'f')
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fprintf(stderr, "f: Expected value at 4\n");
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else
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fprintf(stderr, "f: Unexpected value at 4\n");
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if (undefined[8] == 'd')
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fprintf(stderr, "d: Expected value at 8\n");
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else
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fprintf(stderr, "d: Unexpected value at 8\n");
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/* We verify write watchpoints are triggered at 4 and 8, not at 0 */
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fprintf(stderr, "before writing 0\n");
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undefined[0] = 'U';
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fprintf(stderr, "before writing 4\n");
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undefined[4] = 'F';
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fprintf(stderr, "before writing 8\n");
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undefined[8] = 'D';
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fprintf(stderr, "after writing 8\n");
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/* after having remove the watchpoints, check we can read and write
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without break. */
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fprintf(stderr, "value %s\n", undefined);
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fprintf(stderr, "before rewriting 0\n");
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undefined[0] = '0';
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fprintf(stderr, "before rewriting 4\n");
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undefined[4] = '4';
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fprintf(stderr, "before rewriting 8\n");
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undefined[8] = '8';
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fprintf(stderr, "value %s\n", undefined);
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{
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char *k50 = malloc(50000);
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memset (k50, 'p', 50000);
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fprintf(stderr, "value of k50[1000] %c\n", k50[1000]);
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free(k50); //break2
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}
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exit(0);
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}
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