1  /* Test strncmp builtin expansion for compilation and proper execution.  */
       2  /* { dg-do run { target *-*-linux* *-*-gnu* *-*-uclinux* } } */
       3  /* { dg-options "-O2" } */
       4  /* { dg-require-effective-target ptr32plus } */
       5  
       6  #include <stdio.h>
       7  #include <stdlib.h>
       8  #include <string.h>
       9  #include <sys/mman.h>
      10  #include <unistd.h>
      11  #include <stdlib.h>
      12  
      13  int lib_memcmp(const void *a, const void *b, size_t n) asm("memcmp");
      14  int lib_strncmp(const char *a, const char *b, size_t n) asm("strncmp");
      15  
      16  static void test_driver_strncmp (void (test_strncmp)(const char *, const char *, int),
      17  				 void (test_memcmp)(const void *, const void *, int),
      18  				 size_t sz)
      19  {
      20    long pgsz = sysconf(_SC_PAGESIZE);
      21    char buf1[sz+1];
      22    char *buf2;
      23  #if _POSIX_C_SOURCE >= 200112L
      24    if ( posix_memalign ((void **)&buf2, pgsz, 2*pgsz) ) abort ();
      25  #else
      26    if ( !(buf2 = valloc(2*pgsz))) abort ();
      27  #endif
      28    char *p2;
      29    int r,i,e;
      30  
      31    r = mprotect (buf2+pgsz,pgsz,PROT_NONE);
      32    if (r < 0) abort();
      33    
      34    memset(buf1,'A',sz);
      35    for(i=10; i>=0; i--) {
      36      p2 = buf2+pgsz-sz-i;
      37      memset(p2,'A',sz);
      38      e = lib_strncmp(buf1,p2,sz);
      39      (*test_strncmp)(buf1,p2,e);
      40      e = lib_memcmp(buf1,p2,sz);
      41      (*test_memcmp)(buf1,p2,e);
      42    }
      43    mprotect (buf2+pgsz,pgsz,PROT_READ|PROT_WRITE);
      44    free(buf2);
      45  }
      46  
      47  #define RUN_TEST(SZ) test_driver_strncmp (test_strncmp_ ## SZ, test_memcmp_ ## SZ, SZ);
      48  
      49  #define DEF_TEST(SZ) \
      50  __attribute__((noinline))						  \
      51  void test_strncmp_ ## SZ (const char *str1, const char *str2, int expect) \
      52  {									  \
      53    int r;								  \
      54    r = strncmp(str1,str2,SZ);						  \
      55    if ( r < 0 && !(expect < 0) ) abort();				  \
      56    if ( r > 0 && !(expect > 0) )	abort();				  \
      57    if ( r == 0 && !(expect == 0) ) abort();				  \
      58  }                                                                         \
      59  __attribute__((noinline))						  \
      60  void test_memcmp_ ## SZ (const void *p1, const void *p2, int expect)      \
      61  {									  \
      62    int r;								  \
      63    r = memcmp(p1,p2,SZ);						          \
      64    if ( r < 0 && !(expect < 0) ) abort();				  \
      65    if ( r > 0 && !(expect > 0) )	abort();				  \
      66    if ( r == 0 && !(expect == 0) ) abort();				  \
      67  }
      68  
      69  DEF_TEST(1)
      70  DEF_TEST(2)
      71  DEF_TEST(3)
      72  DEF_TEST(4)
      73  DEF_TEST(5)
      74  DEF_TEST(6)
      75  DEF_TEST(7)
      76  DEF_TEST(8)
      77  DEF_TEST(9)
      78  DEF_TEST(10)
      79  DEF_TEST(11)
      80  DEF_TEST(12)
      81  DEF_TEST(13)
      82  DEF_TEST(14)
      83  DEF_TEST(15)
      84  DEF_TEST(16)
      85  DEF_TEST(32)
      86  DEF_TEST(64)
      87  DEF_TEST(65)
      88  DEF_TEST(66)
      89  DEF_TEST(67)
      90  DEF_TEST(68)
      91  DEF_TEST(69)
      92  DEF_TEST(70)
      93  DEF_TEST(71)
      94  
      95  int
      96  main(int argc, char **argv)
      97  {
      98    RUN_TEST(1) ;
      99    RUN_TEST(2) ;
     100    RUN_TEST(3) ;
     101    RUN_TEST(4) ;
     102    RUN_TEST(5) ;
     103    RUN_TEST(6) ;
     104    RUN_TEST(7) ;
     105    RUN_TEST(8) ;
     106    RUN_TEST(9) ;
     107    RUN_TEST(10);
     108    RUN_TEST(11);
     109    RUN_TEST(12);
     110    RUN_TEST(13);
     111    RUN_TEST(14);
     112    RUN_TEST(15);
     113    RUN_TEST(16);
     114    RUN_TEST(32);
     115    RUN_TEST(64);
     116    RUN_TEST(65);
     117    RUN_TEST(66);
     118    RUN_TEST(67);
     119    RUN_TEST(68);
     120    RUN_TEST(69);
     121    RUN_TEST(70);
     122    RUN_TEST(71);
     123    return 0;
     124  }