tests/printf.c

   1 #include <sys/types.h>
   2 #include <sys/resource.h>
   3 #include <math.h>
   4 #include <stdio.h>
   5 #include <stdint.h>
   6 #include <string.h>
   7 #include <time.h>
   8 #include <stdlib.h>
   9 #include <os/assumes.h>
  10
  11 #include "darwintest.h"
  12 #include "darwintest_utils.h"
  13
  14 static void crash_callback(const char *str) {
  15         T_PASS("Crashed with \"%s\"", str);
  16         T_END;
  17 }
  18
  19 T_DECL(sprintf_percent_n, "Test of %n")
  20 {
  21         char str[1024];
  22         int len, ret;
  23
  24         char *fmt = "%010d%n";
  25
  26         T_EXPECT_POSIX_SUCCESS((ret = snprintf(str, sizeof(str), fmt, 0, &len)), NULL);
  27         T_EXPECT_EQ(len, ret, NULL);
  28
  29         char fmt_buf[32];
  30         strlcpy(fmt_buf, fmt, sizeof(fmt_buf));
  31
  32         os_set_crash_callback(crash_callback);
  33         snprintf(str, sizeof(str), fmt_buf, 0, &len);
  34         T_ASSERT_FAIL("Should have crashed on dynamic %%n");
  35 }
  36
  37 #if !TARGET_OS_IPHONE
  38 #define STRSIZE (1024 * 1024 * 256)
  39
  40 T_DECL(printf_PR_30663523, "Test for PR-30663523",
  41                 T_META_CHECK_LEAKS(NO))
  42 {
  43         char *temp_path;
  44         asprintf(&temp_path, "%s/%s", dt_tmpdir(), "big_file");
  45
  46         {
  47                 char *x = calloc(1, 0x80000001);
  48                 memset(x, 0x41, 0x80000001);
  49
  50                 FILE *f = fopen(temp_path, "w");
  51                 int len = fprintf(f, "%s", x);
  52                 T_EXPECT_EQ(len, EOF, "fprintf should return EOF when string is longer than INT_MAX");
  53                 fclose(f);
  54         }
  55
  56         {
  57                 char *x = calloc(1, STRSIZE);
  58                 memset(x, 0x41, STRSIZE - 1);
  59
  60                 FILE *f = fopen(temp_path, "w");
  61                 int len = fprintf(f, "%s%s%s%s%s%s%s%s%s%s", x,x,x,x,x,x,x,x,x,x);
  62                 T_EXPECT_EQ(len, EOF, "fprintf should return EOF when output string is longer than INT_MAX");
  63                 fclose(f);
  64         }
  65 }
  66 #endif // !TARGET_OS_IPHONE