procfs: Fix pread/pwrite to procfs fail when specified size is bigger than 4MB

Fujitsu: POSTK_DEBUG_TEMP_FIX_43
Refs: #1018
Change-Id: I736ac69885695ef8eeababc3fcfe69a6258b4e16

test/issues/1018/CT_001.c

@@ -0,0 +1,99 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include "./test_chk.h"
+
+#define TEST_NAME "CT_001"
+
+#define MEGA (1024 * 1024)
+
+#define PROCFILE_LEN 128
+#define MAP_LEN (8 * MEGA)
+
+int main(int argc, char *argv[])
+{
+	int fd = 0, i = 0;
+	pid_t pid = getpid();
+	char pfname[PROCFILE_LEN];
+	unsigned long *anon_map = NULL;
+	unsigned long *tmp_buf = NULL;
+	int data_pos[3] = {1 * MEGA / sizeof(unsigned long),
+			2 * MEGA / sizeof(unsigned long),
+			4 * MEGA / sizeof(unsigned long)};
+	off_t ret = 0;
+
+	printf("*** %s start *******************************\n", TEST_NAME);
+
+	/* anonymous mmap */
+	anon_map = (unsigned long *)mmap(NULL, MAP_LEN, PROT_READ | PROT_WRITE,
+			MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+	OKNG(anon_map == MAP_FAILED, "mmap device file");
+	printf("  anonymous map to %p, size:%.2f MB\n",
+	       anon_map, (double)MAP_LEN / MEGA);
+
+	/* allocate tmp_buf */
+	tmp_buf = (unsigned long *)mmap(NULL, MAP_LEN, PROT_READ | PROT_WRITE,
+			MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+	CHKANDJUMP(tmp_buf == NULL, "alloc tmp_buf");
+
+	/* set magic_number */
+	anon_map[data_pos[0]] = 0x1111;
+	anon_map[data_pos[1]] = 0x2222;
+	anon_map[data_pos[2]] = 0x3333;
+
+	/* generate proc_mem path */
+	sprintf(pfname, "/proc/%d/mem", pid);
+
+	/* open proc_mem */
+	fd = open(pfname, O_RDWR);
+	CHKANDJUMP(fd < 0, "open proc_mem");
+
+	/* pread 2MB */
+	errno = 0;
+	ret = pread(fd, tmp_buf, 2 * MEGA, (off_t)anon_map);
+	OKNG(ret != 2 * MEGA || errno != 0, "2MB pread");
+
+	/* check read data */
+	OKNG(tmp_buf[data_pos[0]] != anon_map[data_pos[0]],
+	     "check read data :0x%lx", tmp_buf[data_pos[0]]);
+
+	/* pread 4MB */
+	errno = 0;
+	ret = pread(fd, tmp_buf, 4 * MEGA, (off_t)anon_map);
+	OKNG(ret != 4 * MEGA || errno != 0, "4MB pread");
+
+	/* check read data */
+	OKNG(tmp_buf[data_pos[1]] != anon_map[data_pos[1]],
+	     "check read data :0x%lx", tmp_buf[data_pos[1]]);
+
+	/* pread 8MB */
+	errno = 0;
+	ret = pread(fd, tmp_buf, 8 * MEGA, (off_t)anon_map);
+	OKNG(ret != 8 * MEGA || errno != 0, "8MB pread");
+
+	/* check read data */
+	OKNG(tmp_buf[data_pos[2]] != anon_map[data_pos[2]],
+	     "check read data :0x%lx", tmp_buf[data_pos[2]]);
+
+	close(fd);
+
+	printf("*** %s PASSED\n\n", TEST_NAME);
+
+	return 0;
+
+fn_fail:
+	if (fd > 0) {
+		close(fd);
+	}
+
+	printf("*** %s FAILED\n\n", TEST_NAME);
+
+	return -1;
+
+}