Attachment 154814 Details for Bug 211335 – test program

test program

direct_io_test.c (text/plain), 1.95 KB, created by Radovan Augustin on 2007-05-16 12:54:39 UTC

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Creator: Radovan Augustin

Created: 2007-05-16 12:54:39 UTC

Size: 1.95 KB

patch

obsolete

>/* test for BZ 211335 */
>#include <fcntl.h>
>#include <stdio.h>
>#include <stdlib.h>
>#include <string.h>
>#include <unistd.h>
>
>#define TEST_FILE_NAME 			"directIO_memory_leak"
>#define PAGE_SIZE 			(4096)
>#define BUFFER_ALIGNMENT		PAGE_SIZE
>#define BUFFER_ALIGN 			(PAGE_SIZE - 1)
>
>/* how much memory do you want to lost today? */
>/* 100 MB */
>#define LOST_PAGES			25600
>#define LOST_MEM			(PAGE_SIZE * LOST_PAGES)
>
>int write_buffer(int fd, char *buffer, ssize_t count)
>{
>    ssize_t ret;
>    
>    while (count > 0) {
>	ret = write(fd, buffer, count);
>	if (ret < 0) {
>	    return -1;
>	}
>	buffer += ret;
>	count -= ret;
>    }
>    return 0;
>}
>
>int main()
>{
>    int		fout, i;
>    char	*buf;
>    char	*aligned_buf;
>
>    /* create file with a gap */
>    printf("Creating file with gap\n");
>    
>    fout = open(TEST_FILE_NAME, O_CREAT | O_TRUNC | O_WRONLY);
>    if (fout < 0) {
>	perror("creating new file");
>	return 1;
>    }
>    if (0 > lseek(fout, LOST_MEM, SEEK_SET)) {
>	perror("lseek");
>	return 1;
>    }
>    i = 0x12;
>    if (1 != write(fout, &i, 1)) {
>	perror("write");
>	return 1;
>    }
>    close(fout);
>
>    printf("File created\n");
>
>    printf("Open test file\n");
>
>    /* create and align buffer to BUFFER_ALIGNMENT */
>    buf = (char *)malloc(LOST_MEM + BUFFER_ALIGNMENT);
>    if (buf == NULL) {
>	printf("error allocating memory\n");
>	return 1;
>    }
>    aligned_buf = (char *) (((long)buf & ~BUFFER_ALIGN) + BUFFER_ALIGNMENT);
>
>    memset(aligned_buf, 0x12, LOST_MEM);
>
>    fout = open(TEST_FILE_NAME, O_WRONLY | O_DIRECT);
>    if (fout < 0) {
>	perror("open");
>	return 1;
>    }
>
>    printf("Write test file\n");
>
>    for (i = 0; i < LOST_PAGES; i++) {
>
>	printf("\rPage: %d", i);
>	fflush(stdout);
>
>	if (0 > write_buffer(fout, aligned_buf + (i * PAGE_SIZE), PAGE_SIZE)) {
>	    perror("write_buffer");
>	    return 1;
>	}
>    }
>    close(fout);
>
>    printf("\nFreeing allocated memory\n");
>    free(buf);
>
>    /* memory is lost and will not be freed with BZ211335 */
>
>    printf("Done\n");
>    return 0;
>}

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Attachments on bug 211335: 138819 | 154814